WO2011097812A1 - Method and device for segmenting data in communication system based on carrier aggregation - Google Patents

Abstract

A method and device for segmenting data at the media access control (MAC) layer in a sending device of a wireless communication system which is based on carrier aggregation technique are provided in the present invention. Firstly, one or multiple component carriers for transmitting the data on the logical channel are scheduled for each logical channel, and the total data amount transmitted on all the scheduled component carriers is determined. Secondly, according to the total data amount transmitted on all the component carriers scheduled for each logical channel, in a transmission time interval, a new radio link control layer (RLC) protocol data unit (PDU) is generated separately for all the component carriers scheduled for each logical channel. Finally, a new RLC PDU from each logical channel is mapped to one or multiple component carriers in order to be transmitted, wherein the carriers are scheduled for the logical channel. Correspondingly, a method and device for recomposing data at the MAC layer in a receiving device of a wireless communication system which is based on carrier aggregation technique are provided in the present invention. A method and device for segmenting data at the RLC layer are also provided.

Description

 Carrier aggregation based communication system

 Method and apparatus for data segmentation

Technical field

 The present invention relates to a wireless communication system, and more particularly to a carrier communication technology (Carrier Aggregation, CA) based wireless communication system. Background technique

 In the MAC specification of LTE Release 8/9, the Media Access Control (MAC) layer of the UE is responsible for performing logical channel (LCH) priority processing, which is based on logic. The priority of the channel, the UL grant (uplink grant) is allocated between the logical channels, and the size of the corresponding RLC PDU is calculated for each logical channel within one Transmission Time Interval (TTI).

 In the Long Term Evolution-Advanced (LTE-Advanced) application scenario, a wider bandwidth, up to 100M, is used to meet the needs of higher transmission rates. For backward compatibility, the 100M bandwidth will be divided into multiple Component Carriers, each with a maximum bandwidth of 20M. Therefore, for a user equipment in an LTE-A application scenario, five component carriers can be used. In an application scenario of multiple component carriers of LTE-A, data from a logical channel is placed on multiple component carriers for transmission, which is compared with transmitting data from a logical channel on one component carrier in LTE. , will bring higher data segmentation possibilities.

 At present, in the application scenario of multiple component carriers of LTE-A, how to handle data segmentation is an urgent problem to be solved. Summary of the invention

Based on the above problems, the present invention provides, in one embodiment, a method for data segmentation at an RLC layer in a transmitting device of a carrier-based wireless communication system, the method comprising the steps of: a. Logical channel scheduling for transmitting on the logical channel One or more component carriers of data and determining the amount of data transmitted on each of the scheduled component carriers; b. transmitting on each of the one or more component carriers scheduled for each logical channel The amount of data, in one transmission time interval, respectively generating one or more new RLC PDUs for the one or more component carriers scheduled for each logical channel; c. will be from each logical channel One or more RLC PDUs are mapped to one or more component carriers scheduled for the logical information, respectively.

 Optionally, the step a further includes: scheduling, at the MAC layer, one or more component carriers for transmitting data on the logical channel for each logical channel and determining to transmit on each scheduled component wave. The amount of data is notified to the logical channel by the scheduling result; the step b further includes: scheduling, according to the scheduling result from the MAC layer, the logical channel on each logical channel in a transmission time interval The one or more component carriers generate corresponding one or more new RLC PDUs and send them to the MAC layer; the step c further includes: one or more from each logical channel at the MAC layer The new RLC PDUs are mapped to one or more component carriers scheduled for the logical channel for transmission.

 In another embodiment, the present invention provides a method for data segmentation at a MAC layer in a transmitting device of a carrier-based wireless communication system, the method comprising the following steps: A. scheduling for each logical channel One or more component carriers for transmitting data on the logical channel and determining the total amount of data transmitted on all of the scheduled component carriers; B. transmitting on all component carriers scheduled for each logical channel The total amount of data, in a transmission time interval, respectively, generate a new RLC PDU for all component carriers scheduled for each logical channel; C. Map a new RLC PDU from each logical channel to the Transmission on one or more component carriers scheduled by the logical channel.

Optionally, the step A further includes: scheduling, at the MAC layer, one or more component carriers for transmitting data on the logical channel for each logical channel and determining a total transmission on all scheduled component carriers. The amount of data notifies the scheduling result to each logical channel; the step B further includes: scheduling, according to the scheduling result from the MAC layer, the logical channel on each logical channel in a transmission time interval All component carriers generate a new RLC PDU and send it to the MAC layer; the step C further includes: The MAC layer maps a new RLC PDU from each logical channel to one or more component carriers scheduled for the logical channel for transmission.

 In still another embodiment, the present invention provides a method for data reassembly at a MAC layer in a receiving device of a carrier-based wireless communication system, the method comprising the steps of: i. from one or more component carriers Receiving a plurality of MAC PDUs from the transmitting device; ii. sequentially, according to the header information of the multiple MAC PDUs, data belonging to the same logical channel in one or more of the plurality of MAC PDUs Form an RLC PDU.

 Optionally, the step ii further includes: according to the logical channel identifier information in the multiple MAC PDU header information, and based on the order information of the one or more component carriers, the multiple MAC PDUs The data belonging to the same logical channel among one or more MAC PDUs in the order is recombined into one RLC PDU.

 Optionally, the step ii further includes: performing, according to the logical channel identifier information and the segmentation sequence number information in the multiple MAC PDU header information, one or more of the plurality of MAC PDUs Data belonging to the same logical channel is sequentially reassembled into one RLC PDU.

 The present invention provides, in an embodiment, a first segmentation apparatus for performing data segmentation at an RLC layer in a transmitting device of a carrier aggregation technology-based wireless communication system, the first segmentation device comprising: a first scheduling And means for scheduling, for each logical channel, one or more component carriers for transmitting data on the logical channel and determining an amount of data transmitted on each of the scheduled component carriers; ^ ^ The amount of data transmitted on each component carrier of one or more component carriers scheduled for each logical channel, respectively, within one transmission time interval, the one or each scheduled for each logical channel Multiple component carriers generate corresponding one or more new RLC PDUs; first mapping means for mapping one or more RLC PDUs from each logical channel to one or more scheduled for the logical information Transmission on component carriers.

Optionally, the first scheduling device is further configured to: at the MAC layer, schedule, for each logical channel, one or more component carriers for transmitting data on the logical channel, and determine, on each component carrier that is scheduled. The amount of data transferred and informs each of the logic of the scheduling result The first generating means is further configured to generate, according to the scheduling result from the MAC layer, a phase for the one or more component carriers scheduled for the logical channel on each logical channel in a transmission time interval. Corresponding one or more new RLC PDUs are sent to the MAC layer; the first mapping device is further configured to map one or more new RLC PDUs from each logical channel to the MAC layer respectively The transmission is performed on one or more component carriers scheduled by the logical channel.

 The present invention provides, in another embodiment, a second segmentation device for performing data segmentation at a MAC layer in a transmitting device of a wireless communication system based on a carrier wave aggregation technology, the second segmentation device comprising: a second scheduling apparatus, configured to schedule, for each logical channel, one or more component carriers for transmitting data on the logical channel and determine a total amount of data transmitted on all of the scheduled component carriers; a second generating device, For generating a new RLC PDU for all component carriers scheduled for each logical channel in a transmission time interval according to the total amount of data transmitted on all component carriers scheduled for each logical channel; And a mapping device, configured to map a new RLC PDU from each logical channel to one or more component carriers scheduled for the logical channel.

 Optionally, the second scheduling device is further configured to: at the MAC layer, schedule, for each logical channel, one or more component carriers for transmitting data on the logical channel, and determine to transmit on all scheduled component carriers. The total amount of data and notifying the scheduling result to each of the logical channels; the second generating means is further configured to, according to the scheduling result from the MAC layer, the logical logic on each logical channel within a transmission time interval All component carriers scheduled by the channel generate a new RLC PDU and send it to the MAC layer; the second mapping device is further configured to map a new RLC PDU from each logical channel to the logic at the MAC layer. The transmission is performed on one or more component carriers scheduled by the channel.

The present invention provides, in still another embodiment, a data recombining apparatus for performing data recombination at a MAC layer in a receiving apparatus of a carrier communication technology-based wireless communication system, the data recombining apparatus comprising: receiving means for And receiving, by the plurality of component carriers, a plurality of MAC PDUs from the sending device, where the recombining means is configured to belong to one or more of the plurality of MAC PDUs according to the header information of the multiple MAC PDUs The data of the same logical channel is sequentially reassembled into one RLC PDU. Optionally, the reorganizing device is further configured to: according to the logical channel identifier information in the multiple MAC PDU header information, and based on the order information of the one or more component carriers, the multiple MAC PDUs The data belonging to the same logical channel among one or more MAC PDUs in the order is recombined into one RLC PDU.

 Optionally, the recombining apparatus is further configured to: according to the logical channel identifier information and the segment sequence number information in the multiple MAC PDU header information, one or more MACs of the multiple MAC PDUs The data belonging to the same logical channel in the PDU is sequentially reassembled into one RLC PDU. Used in wireless communication systems based on carrier aggregation technology. DRAWINGS

 Other objects, features, and advantages of the present invention will become more apparent and apparent from the description of the appended claims.

 1 is a flowchart showing a method of data segmentation at an RLC layer in a transmitting device of a carrier aggregation technology-based wireless communication system according to an embodiment of the invention;

 2 is a flow chart showing a method of data segmentation at a MAC layer in a transmitting device of a carrier aggregation technology-based wireless communication system according to an embodiment of the invention;

 3 is a block diagram showing the structure of a first segmentation apparatus for data segmentation at an RLC layer in a transmission device of a carrier aggregation technology-based wireless communication system according to an embodiment of the invention;

 4 is a block diagram showing the structure of a first segmentation device for data segmentation at the MAC layer in a transmitting device of a carrier aggregation technology-based wireless communication system according to an embodiment of the invention.

 Wherein, the same or similar reference numerals denote the same or similar step features/devices (modules). detailed description

 The technical solution of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 illustrates a wireless communication based on carrier aggregation technology according to an embodiment of the invention A flow chart of a method for data segmentation at the RLC layer in a transmitting device of a letter system.

 First, in step S11, the transmitting device 1 schedules, for each logical channel, one or more component carriers for transmitting data on the logical channel and determines the amount of data transmitted on each of the scheduled component carriers.

 Specifically, the transmitting device 1 schedules, for each logical channel, one or more component carriers for transmitting data on the logical channel and determines the amount of data transmitted on each component carrier scheduled at the MAC layer, and The scheduling result notifies each logical channel.

 The scheduling result includes an amount of data transmitted on each of the one or more component carriers scheduled for the logical channel.

 In one embodiment, the MAC layer calculates each component carrier of each of the one or more component carriers for which each logical channel is scheduled, based on the resources of one or more component carriers scheduled for each logical channel. The amount of data transferred on.

 In another embodiment, the MAC layer first calculates the total data transmitted by each logical channel on all of the component carriers it schedules, based on the resources of one or more component carriers scheduled for each logical channel. the amount. Then, the amount of data transmitted by each logical channel on each of the component carriers for which all of the component carriers are scheduled is calculated.

 Next, in step S12, the transmitting device 1 according to the amount of data transmitted on each of the one or more component carriers scheduled for each logical channel, in a transmission time interval, respectively, for each logic The one or more component carriers scheduled by the channel generate corresponding one or more new RLC PDUs (Radio Link Control Layer Protocol Data Units).

 Specifically, the sending device 1 generates, according to the scheduling result from the MAC layer, one or more new ones on each logical channel for one or more component carriers scheduled for the logical channel in one transmission time interval. The RLC PDU is sent to the MAC layer.

 In one embodiment, each logical channel fetches data from the logical channel buffer into one or more new RLC PDUs and sends them to the MAC layer.

 For a logical channel, there is a correspondence between one or more new RLC PDUs generated by the logical channel and one or more component carriers scheduled for the logical channel, that is, one component of one RLC PDU Carrier.

The size of one RLC PDU generated by the logical channel is related to the amount of data that the logical channel is to transmit on the component carrier corresponding to the RLC PDU. For example, the logic The channel is to transmit 50 bits of information on the component carrier corresponding to the RLC PDU, and the size of the RLC PDU should also be 50 bits.

 Of course, if the data in the logical channel buffer is not enough, the corresponding Padding is added at the MAC layer.

 For the first transmission, each logical channel is taken out of the logical channel buffer by an RLC SDU (Radio Link Control Layer Service Data Unit). When data in multiple RLC SDUs taken from a logical channel buffer is assembled into an RLC PDU, the first part of the data and/or the last part of the data in the RLC PDU may be segmented RLC SDU data. That is, if an RLC PDU can only accommodate data in 4 and a half RLC SDUs, data in the first 4 RLC SDUs taken from the logical channel buffer can be sequentially placed in the RLC PDU. Only half of the data in the five RLC SDUs can be placed in the RLC PDU. Part of the data in the 5th RLC SDU is assembled into an RLC PDU together with all the data in the first 4 RLC SDUs. In this case, the data in the fifth RLC SDU is segmented, and the first half of the data is combined with the data in the first four RLC SDUs to generate a new RLC PDU for transmission on one component carrier, and the latter half. The data is assembled with the data in the remaining RLC SDUs in the logical channel buffer into another new RLC PDU for transmission on the other component carrier.

 Similarly, for retransmission, each logical channel fetches from the logical channel buffer is the RLC PDU that failed for the first transmission and needs to be retransmitted. If the size of the new RLC PDU generated by the logical channel during retransmission can only be three-quarters of the size of one RLC PDU when the original transmission is first, the data in the RLC PDU that needs to be retransmitted is divided, where The first three-quarters of the data will generate a new RLC PDU for transmission on one component carrier, and the next quarter of the data will be combined with the rest of the logical channel buffer for the RLC PDUs that need to be retransmitted into another A new RLC PDU is transmitted on another component carrier.

 Finally, in step S13, the transmitting device 1 maps one or more RLC PDUs from each logical channel to one or more component carriers scheduled for the logical channel, respectively.

Specifically, the transmitting device 1 respectively maps one or more new RLC PDUs from each logical channel to one or more component carriers scheduled for the logical channel at the MAC layer. Transfer on.

 It should be noted that the header information generated by each logical channel corresponding to one or more new RLC PDUs of one or more component carriers scheduled for it includes sequence number information. In this way, after receiving, by the RLC layer, one or more new RLC PDUs from one or more component carriers, the receiving device 2 can obtain the sequence number information included in the header information of the one or more new RLC PDUs. The one or more new RLC PDUs are reorganized in order.

 2 is a flow chart showing a method of data segmentation at a MAC layer in a transmitting device of a carrier aggregation technology-based wireless communication system according to an embodiment of the invention.

 First, in step S21, the transmitting device 1 schedules one or more component carriers for transmitting data on the logical channel for each logical channel and determines the total amount of data transmitted on the scheduled full partial carrier.

 Specifically, the transmitting device 1 schedules, at the MAC layer, one or more component carriers for transmitting data on the logical channel for each logical channel and determines a total amount of data transmitted on all scheduled component carriers and schedules The result informs each logical channel.

 The scheduling result includes the total amount of data transmitted on all component carriers scheduled for the logical channel.

 In one embodiment, the MAC layer calculates the total amount of data that each logical channel can transmit on all of its component carriers scheduled based on the resources of one or more component carriers scheduled for each logical channel.

 Next, in step S22, the transmitting device 1 respectively performs all the component carriers scheduled for each logical channel in one transmission time interval according to the total data amount transmitted on all component carriers scheduled for each logical channel. Generate a new RLC PDU.

 Specifically, the sending device 1 generates a new RLC PDU for each component carrier scheduled for the logical channel and sends it to the MAC on each logical channel in a transmission time interval according to the scheduling result from the MAC layer. Floor.

 In one embodiment, each logical channel fetches data from the logical channel buffer into a new RLC PDU and sends it to the MAC layer.

For a logical channel, the size of a new RLC PDU generated by the logical channel and the total data transmitted by the logical channel on all component carriers scheduled for it The size of the quantity is related. For example, the logical channel is to be transmitted on all component carriers scheduled for it.

300 bits of information, then the size of the new RLC PDU should also be 300 bits.

 Of course, if the data in the logical channel buffer is not enough, the corresponding Padding is added at the MAC layer.

 Finally, in step S23, the transmitting device 1 maps a new RLC PDU from each logical channel to one or more component carriers scheduled for the logical channel.

 Specifically, the transmitting device 1 maps a new RLC PDU from each logical channel to one or more component carriers scheduled for the logical channel at the MAC layer for transmission.

 That is, the transmitting device 1 segments the data in a new RLC PDU from each logical channel at the MAC layer, and then places the segmented one or more data segments into one or more MACs respectively. The PDU is mapped to the one or more component PONs for transmission.

 In one embodiment, each of a plurality of component carriers configured for the transmitting device 1 is set in an order that is synchronized in the transmitting device 1 and the receiving device 2. After the MAC layer segments the data in a new RLC PDU from a logical channel and assembles into one or more MAC PDUs, the one or more MAC PDUs are scheduled as one or more of the logical channels. The order of the component carriers is mapped one by one to the one or more component carriers for transmission.

 Corresponding to the embodiment, after the receiving device 2 receives the plurality of MAC PDUs from the transmitting device 1 from the one or more component carriers, according to the logical channel identifier information in the header information of the multiple MAC PDUs, and the The order information of one or more component carriers, and the data belonging to the same logical channel among the one or more MAC PDUs of the plurality of MAC PDUs are sequentially recombined into one RLC PDU.

 For example, the transmitting device 1 is configured with three component carriers, which are respectively CC1, CC2, and CC3. Assuming that the component carriers scheduled by a certain logical channel are CC1 and CC3, then the MAC layer generates a new one for the logical channel. The data in the RLC PDU is segmented to generate a first data segment and a second data segment, and then the first data segment is put into one MAC PDU and transmitted through CC1, and the second data segment is segmented into another. The MAC PDU is transmitted through CC3.

When the receiving device 2 receives the two MAC PDUs on CC1 and CC3, according to The logical channel identifier information in the two MAC PDU header information may be that the first data segment and the second data segment of the two MAC PDUs belong to the same logical channel, and then the receiving device 2 will be from CC 1 The first data segment in the received MAC PDU and the second data segment in the MAC PDU received from CC3 are sequentially reassembled into the original RLC PDU.

 The logical channel identifier information is used to identify which logical channel or logical channels the data in the MAC PDU belongs to. For example, all data in one MAC PDU may belong to only one logical channel, or some of the data may belong to one logical channel, and another part of data belongs to another logical channel.

 In another embodiment, the MAC layer segments data in a new RLC PDU from each logical channel, and the header information of the one or more MAC PDUs assembled includes at least logical channel identifier information. And segment number information.

 The logical channel identifier information is used to identify which logical channel or logical channels the data in the MAC PDU belongs to.

 The segment sequence number information is used to indicate which data segment of the logical channel the data in the MAC PDU belongs to or which data segment belongs to which logical segment.

 Optionally, the header information of each MAC PDU further includes last segment indication information and/or MAC layer segment indication information.

 The last segment indication information is used to indicate whether data belonging to a certain logical channel in the MAC PDU is the last segment. If it is the last segment, then the MAC layer does not need to wait for subsequent data, but can directly reassemble all the data segments that have been received belonging to the logical channel.

 The MAC layer segmentation indication information is used to indicate whether data belonging to a certain logical channel in the MAC PDU is segmented. If it has not been segmented, the MAC layer does not need to wait for subsequent data for reassembly, but can directly transfer the data belonging to the logical channel in the MAC PDU to the RLC layer.

Corresponding to this embodiment, after the receiving device 2 receives the plurality of MAC PDUs from the transmitting device 1 from the one or more component carriers, according to the logical channel identifier information and the segmentation in the header information of the multiple MAC PDUs Sequence number information, the data belonging to the same logical channel in one or more MAC PDUs of the multiple MAC PDUs are sequentially reorganized into one RLC PDU.

 It should be noted that the foregoing sending device 1 includes but is not limited to a user equipment or a base station. Correspondingly, the receiving device 2 includes but is not limited to a base station or a user equipment. For example, when the transmitting device 1 is a user equipment, the receiving device 2 is a base station; and when the transmitting device 1 is a base station, the receiving device 2 is a user equipment. The above is a description of the technical solution of the present invention from the viewpoint of method steps. Hereinafter, the technical solution of the present invention will be further described from the perspective of the device module.

 Figure 3 is a block diagram showing the structure of a first segmentation device for data segmentation at the RLC layer in a transmitting device of a carrier aggregation technology based wireless communication system, in accordance with one embodiment of the invention. The first segmentation device 10 includes a first scheduling device 101, a first generation device 102, and a first mapping device 103.

 First, the first scheduling device 101 in the first segmentation device 10 in the transmitting device 1 schedules, for each logical channel, one or more component carriers for transmitting data on the logical channel and determines each component that is scheduled. The amount of data transmitted on the carrier.

 Specifically, the first scheduling apparatus 101 schedules, at the MAC layer, one or more component carriers for transmitting data on the logical channel for each logical channel and determines the amount of data transmitted on each of the scheduled component carriers. , and notify each logical channel of the scheduling result.

 The scheduling result includes an amount of data transmitted on each of the one or more component carriers scheduled for the logical channel.

 In one embodiment, the first scheduling device 101 calculates, at the MAC layer, one or more components for which each logical channel is scheduled, based on resources of one or more component carriers scheduled for each logical channel. The amount of data transmitted on each component carrier in the carrier.

 In another embodiment, the first scheduling device 101 calculates, at the MAC layer, the resources of one or more component carriers scheduled for each logical channel, firstly, respectively, all the components for which each logical channel is scheduled. The total amount of data transmitted on the carrier. Then, the amount of data transmitted by each logical channel on each of the component carriers for which it is scheduled is calculated.

Second, the first generating means 102 of the first segmentation means 10 in the transmitting device 1 is based on each of the one or more component carriers scheduled for each logical channel. The amount of data transmitted, in one transmission time interval, respectively generating one or more new RLC PDUs (Radio Link Control Layer Protocol data) for the one or more component carriers scheduled for each logical channel. unit).

 Specifically, the first generating device 102 generates, according to the scheduling result from the MAC layer, a corresponding one or more component carriers scheduled for the logical channel on each logical channel in one transmission time interval. One or more new RLC PDUs are sent to the MAC layer.

 In one embodiment, the first generation device 102 fetches data from the logical channel buffer on each logical channel into one or more new RLC PDUs and sends them to the MAC layer.

 For a logical channel, there is a correspondence between one or more new RLC PDUs generated by the first generating device 102 on the logical channel and one or more component carriers scheduled for the logical channel, That is, one RLC PDU corresponds to one component carrier.

 The size of one RLC PDU generated by the logical channel is related to the amount of data that the logical channel is to transmit on the component carrier corresponding to the RLC PDU. For example, if the logical channel is to transmit 50 bits of information on a component carrier corresponding to the RLC PDU, then the size of the RLC PDU should also be 50 bits.

 Of course, if the data in the logical channel buffer is not enough, the corresponding Padding is added at the MAC layer.

For the first transmission, each logical channel is taken out of the logical channel buffer by an RLC SDU (Radio Link Control Layer Service Data Unit). When data in a plurality of RLC SDUs taken from a logical channel buffer is assembled into one RLC PDU, the first part of the data and/or the last part of the data in the RLC PDU may be segmented RLC SDU data. That is, if an RLC PDU can only accommodate data in 4 and a half RLC SDUs, data in the first 4 RLC SDUs taken from the logical channel buffer can be sequentially placed in the RLC PDU. Only half of the data in the five RLC SDUs can be placed in the RLC PDU. Part of the data in the 5th RLC SDU is assembled into one RLC PDU together with all the data in the first 4 RLC SDUs. In this case, the data in the fifth RLC SDU is segmented, and the first half of the data is combined with the data in the first four RLC SDUs to generate a new RLC PDU for transmission on one component carrier, and the latter half. Data The data in the remaining number of RLC SDUs in the logical channel buffer is assembled into another new RLC PDU for transmission on the other component carrier.

 Similarly, for retransmission, each logical channel takes the RLC PDU from the logical channel buffer for the first transmission failure and needs to be retransmitted. If the retransmission, the size of the new RLC PDU generated by the logical channel can only be It is the original three-quarters of the size of an RLC PDU. Then, the data in the RLC PDU that needs to be retransmitted will be split. The first three-quarters of the data will generate a new RLC PDU in one component. The carrier transmits on the carrier, and the next quarter of the data is assembled with the remaining RLC PDUs in the logical channel buffer that need to be retransmitted into another new RLC PDU for transmission on the other component carrier.

 Finally, the first mapping device 103 in the first segmentation device 10 in the transmitting device 1 maps one or more RLC PDUs from each logical channel to one or more component carriers scheduled for the logical channel, respectively Transmission

 Specifically, the first mapping device 103 maps one or more new RLC PDUs from each logical channel to one or more component carriers scheduled for the logical channel at the MAC layer.

 It should be noted that the header information generated by the first generating device 102 on each logical channel corresponding to one or more new RLC PDUs of one or more component carriers scheduled for it includes a sequence number. information. In this way, the receiving device 2 receives the one or more new RLC PDUs from one or more component carriers after the RLC layer receives the sequence number included in the header information of the one or more new RLC PDUs. The information can be reorganized in sequence for the one or more new RLC PDUs.

 Fig. 4 is a block diagram showing the structure of a second segmentation means for data segmentation at the MAC layer in a transmitting device of a carrier aggregation technology based wireless communication system according to an embodiment of the invention. The second segmentation device 10 includes a second scheduling device 101, a second generation device 102, and a second mapping device 103.

 First, the second scheduling device 10 in the second segmentation device 10 in the transmitting device 1 schedules, for each logical channel, one or more component carriers for transmitting data on the logical channel and determines all of the scheduled The total amount of data transmitted on the component carrier.

Specifically, the second scheduling apparatus 101 is configured for each logical channel at the MAC layer. Transmitting one or more component carriers of data on the logical channel and determining the total amount of data transmitted on all of the scheduled component carriers and notifying each logical channel of the scheduling result.

 The scheduling result includes the total amount of data transmitted on all component carriers scheduled for the logical channel.

 In one embodiment, the second scheduling device 101 calculates, based on the resources of one or more component carriers scheduled for each logical channel, the MAC layer, for all component carriers that each logical channel can schedule. The total amount of data transferred on.

 Secondly, the second generation device 102 of the second segmentation device 10 in the transmitting device 1 is respectively based on the total amount of data transmitted on all component carriers scheduled for each logical channel, within one transmission time interval, respectively A new RLC PDU is generated for all component carriers scheduled for each logical channel.

 Specifically, the second generating device 102 generates a new RLC PDU for each component carrier scheduled for the logical channel on each logical channel according to a scheduling result from the MAC layer and It is sent to the MAC layer.

 In one embodiment, the second generating means 102, on each logical channel, fetches data from the logical channel buffer into a new RLC PDU and sends it to the MAC layer.

 For a logical channel, the second generating means 102, the size of a new RLC PDU generated on the logical channel and the total amount of data transmitted by the logical channel on all component carriers scheduled for it related. For example, if the logical channel is to transmit 300 bits of information on all component carriers it schedules, then the new RLC PDU should also be 300 bits in size.

 Of course, if the data in the logical channel buffer is not enough, the corresponding Padding is added at the MAC layer.

 Finally, the second mapping device 103 of the second segmentation device 10 in the transmitting device 1 maps a new RLC PDU from each logical channel to one or more component carriers scheduled for the logical channel. transmission.

 Specifically, the second mapping device 103 maps a new RLC PDU from each logical channel to one or more component carriers scheduled for the logical channel at the MAC layer.

That is, the second mapping device 103 will be a new one from each logical channel at the MAC layer. Data in the RLC PDU is segmented, and then the segmented one or more data segments are respectively placed into one or more MAC PDUs and the one or more MAC PDUs are mapped to one or more respectively Transmission on the component carrier.

 In one embodiment, each of a plurality of component carriers configured for the transmitting device 1 is set in an order, and the order information is synchronized in the transmitting device 1 and the receiving device 2. The second mapping means 103, after segmenting the data in a new RLC PDU from a logical channel by the MAC layer and assembling into one or more MAC PDUs, the one or more MAC PDUs are followed by the logic The order of one or more component carriers scheduled by the channel is mapped one by one to the one or more component carriers for transmission.

 Corresponding to the embodiment, after the receiving device 2 receives the plurality of MAC PDUs from the transmitting device 1 from the one or more component carriers, according to the logical channel identifier information in the header information of the multiple MAC PDUs, and the The order information of one or more component carriers, and the data belonging to the same logical channel among the one or more MAC PDUs of the plurality of MAC PDUs are sequentially recombined into one RLC PDU.

 For example, the transmitting device 1 is configured with three component carriers, CC1, CC2, and CC3, respectively. If the component carriers scheduled for a certain logical channel are CC1 and CC3, then the second mapping device 103' is at the MAC layer. The data in a new RLC PDU generated by the channel is segmented to generate a first data segment and a second data segment, and then the first data segment is put into a MAC PDU and transmitted through CC1, and the second The data segment is put into another MAC PDU and transmitted through CC3.

After receiving the two MAC PDUs on the CC1 and the CC3, the receiving device 2 can know the first data segment and the first of the two MAC PDUs according to the logical channel identifier information in the two MAC PDU header information. The two data segments belong to the same logical channel, and then the receiving device 2 sequentially weights the first data segment in the MAC PDU received from CC1 and the second data segment in the MAC PDU received from CC3. The original RLC is composed, wherein the logical channel identifier information is used to identify which logical channel or logical channels the data in the MAC PDU belongs to. For example, all data in one MAC PDU may belong to only one logical channel, or some of the data may belong to one logical channel, and another part of data belongs to another logical channel. In another embodiment, the second mapping means 103 segments the data in a new RLC PDU from each logical channel at the MAC layer and assembles one or more

The header information of the MAC PDU includes at least logical channel identifier information and a segment sequence number signal,

 The logical channel identifier information is used to identify which logical channel or logical channels the data in the MAC PDU belongs to.

 The segment sequence number information is used to indicate which data segment of the logical channel the data in the MAC PDU belongs to or which data segment belongs to which logical segment.

 Optionally, the header information of each MAC PDU further includes last segment indication information and/or MAC layer segment indication information.

 The last segment indication information is used to indicate whether data belonging to a certain logical channel in the MAC PDU is the last segment. If it is the last segment, then the MAC layer does not need to wait for subsequent data, but can directly reassemble all the data segments that have been received belonging to the logical channel.

 The MAC layer segmentation indication information is used to indicate whether data belonging to a certain logical channel in the MAC PDU is segmented. If it has not been segmented, the MAC layer does not need to wait for subsequent data for reassembly, but can directly transfer the data belonging to the logical channel in the MAC PDU to the RLC layer.

 Corresponding to this embodiment, after the receiving device 2 receives the plurality of MAC PDUs from the transmitting device 1 from the one or more component carriers, according to the logical channel identifier information and the segmentation in the header information of the multiple MAC PDUs The sequence number information is used to sequentially reassemble data belonging to the same logical channel in one or more of the plurality of MAC PDUs into one RLC PDU.

It should be noted that the foregoing sending device 1 includes but is not limited to a user equipment or a base station. Correspondingly, the receiving device 2 includes but is not limited to a base station or a user equipment. For example, when the transmitting device 1 is a user equipment, the receiving device 2 is a base station; and when the transmitting device 1 is a base station, the receiving device 2 is a user equipment. The invention has been illustrated and described in detail in the drawings and the foregoing description The embodiment is described.

 Other variations to the disclosed embodiments can be understood and effected by those skilled in the <RTIgt; In the claims, the <RTIgt; "comprising"</RTI> does not exclude other elements and steps, and the word "a" does not exclude the plural. In the practical application of the present invention, a part may perform the functions of a plurality of technical features cited in the claims. Any reference signs in the claims should not be construed as limiting the scope.

Claims

Claim A method for data segmentation at an RLC layer in a transmitting device of a wireless communication system based on carrier aggregation technology, the method comprising the steps of:  a. scheduling, for each logical channel, one or more component carriers for transmitting data on the logical channel and determining an amount of data transmitted on each of the scheduled component carriers;  b. according to the amount of data transmitted on each of the one or more component carriers scheduled for each logical channel, in one transmission time interval, respectively, the one or each scheduled for each logical channel Multiple component carriers generate corresponding one or more new RLC PDUs;  c Mapping one or more RLC PDUs from each logical channel to one or more component carriers scheduled for the logical information.  2. The method according to claim 1, wherein the step a further comprises: scheduling, at the MAC layer, one or more component carriers for transmitting data on the logical channel for each logical channel and determining The amount of data transmitted on each of the scheduled component carriers and notifying the scheduling result to each of the logical channels;  The step b further includes:  Generating one or more new RLC PDUs for each one or more component carriers scheduled for the logical channel on each logical channel according to a scheduling result from the MAC layer. Send it to the MAC layer;  The step c further includes:  One or more new RLC PDUs from each logical channel are mapped at the MAC layer to one or more component carriers scheduled for the logical channel for transmission.  The method according to claim 2, wherein the step b further comprises: extracting data from the logical channel buffer on each logical channel into one or more new RLC PDUs.  A method for data segmentation at a MAC layer in a transmitting device of a wireless communication system based on carrier aggregation technology, the method comprising the steps of: A. scheduling one or more data for transmitting the logical channel for each logical channel Component carriers and determining the total amount of data transmitted on all of the scheduled component carriers; B. generating, according to the total amount of data transmitted on all component carriers scheduled for each logical channel, a new RLC PDU for each component carrier scheduled for each logical channel in one transmission time interval;  C. Mapping a new RLC PDU from each logical channel to one or more component carriers scheduled for the logical channel.  5. The method according to claim 4, wherein the step A further comprises: scheduling, at the MAC layer, one or more component carriers for transmitting data on the logical channel for each logical channel and determining The total amount of data transmitted on all of the scheduled component carriers and notifying the each logical channel of the scheduling result;  The step B further includes:  According to the scheduling result from the MAC layer, a new RLC PDU is generated on each logical channel for all component carriers scheduled for the logical channel and sent to the MAC layer in one transmission time interval;  The step C further includes:  A new RLC PDU from each logical channel is mapped at the MAC layer to one or more component carriers scheduled for the logical channel for transmission.  The method according to claim 5, wherein the step B further comprises: extracting data from the logical channel buffer on each logical channel and assembling into a new one. RLC PDIL  A method for data recombination at a MAC layer in a receiving device of a wireless communication system based on carrier aggregation technology, the method comprising the steps of:  i. receiving a plurality of MAC PDUs from the transmitting device from one or more component carriers; ii. locating one or more of the plurality of MAC PDUs according to header information of the plurality of MAC PDUs Data belonging to the same logical channel is sequentially reassembled into one RLC PDU. The method according to claim 7, wherein the step ii further comprises: based on the logical channel identifier information in the plurality of MAC PDU header information, and based on the one or more component carriers Order information, one of the plurality of MAC PDUs Data belonging to the same logical channel among one or more MAC PDUs is sequentially reassembled into one RLC PDU.  The method according to claim 7, wherein the step ii further comprises: performing the multiple according to logical channel identifier information and segment sequence number information in the plurality of MAC PDU header information Data belonging to the same logical channel in one or more MAC PDUs in the MAC PDU are sequentially reassembled into one RLC PDU.  The method according to claim 9, wherein the MAC PDU header information further includes last segment indication information and/or MAC layer segment indication information.  A first segmentation device for performing data segmentation at an RLC layer in a transmitting device of a wireless communication system based on a carrier aggregation technology, the first segmentation device comprising:  a first scheduling apparatus, configured to schedule, for each logical channel, one or more component carriers for transmitting data on the logical channel and determine an amount of data transmitted on each of the scheduled component carriers;  a first generating means, configured to schedule, according to each of the one or more component carriers scheduled for each logical channel, the amount of data transmitted on each of the component carriers, respectively, in one transmission time interval The one or more component carriers generate corresponding one or more new RLC PDUs;  And a first mapping device, configured to map one or more RLC PDUs from each logical channel to one or more component carriers scheduled for the logical information.  The first segmentation device according to claim 11, wherein the first scheduling device is further configured to:  Scheduling one or more component carriers for transmitting data on the logical channel for each logical channel at the MAC layer and determining the amount of data transmitted on each of the scheduled component carriers and notifying each of the scheduling results Logical channel  The first generating device is further configured to:  Generating one or more new RLC PDUs for each one or more component carriers scheduled for the logical channel on each logical channel according to a scheduling result from the MAC layer. Send it to the MAC layer; The first mapping device is further configured to: One or more new RLC PDUs from each logical channel are mapped at the MAC layer to one or more component carriers scheduled for the logical channel, respectively.  A second segmentation device for performing data segmentation at a MAC layer in a transmitting device of a wireless communication system based on a carrier aggregation technology, the second segmentation device comprising:  a second scheduling apparatus, configured to schedule, for each logical channel, one or more component carriers for transmitting data on the logical channel and determine a total amount of data transmitted on all of the scheduled component carriers;  a second generating means, configured to generate a new one for each component carrier scheduled for each logical channel in a transmission time interval according to the total amount of data transmitted on all component carriers scheduled for each logical channel RLC PDU;  A second mapping means for mapping a new RLC PDU from each logical channel to one or more component carriers scheduled for the logical channel.  The second segmentation device according to claim 13, wherein the second scheduling device is further configured to:  Scheduling one or more component carriers for transmitting data on the logical channel for each logical channel at the MAC layer and determining the total amount of data transmitted on all of the scheduled component carriers and notifying each of the scheduling results Logical channel  The second generating device is further configured to:  According to the scheduling result from the MAC layer, a new RLC PDU is generated on each logical channel for all component carriers scheduled for the logical channel and sent to the MAC layer in one transmission time interval;  The second mapping device is further configured to:  A new RLC PDU from each logical channel is mapped at the MAC layer to one or more component carriers scheduled for the logical channel for transmission.  A data recombining apparatus for performing data recombination at a MAC layer in a receiving device of a wireless communication system based on a carrier aggregation technology, the data recombining apparatus comprising:  Receiving means, configured to receive, from one or more component carriers, a plurality of MAC PDUs from the sending device; Reorganizing means, configured to, according to the header information of the multiple MAC PDUs, the multiple Data belonging to the same logical channel among one or more MAC PDUs in the MAC PDU is sequentially reassembled into one RLC PDU.