WO2008106869A1

WO2008106869A1 - A method for uplink scheduling access control

Info

Publication number: WO2008106869A1
Application number: PCT/CN2008/000455
Authority: WO
Inventors: Yincheng Zhang; Hui Chen
Original assignee: Zte Corporation
Priority date: 2007-03-07
Filing date: 2008-03-07
Publication date: 2008-09-12
Also published as: CN101262279A; KR101056034B1; JP5007347B2; CN101262279B; KR20090129458A; JP2010520679A

Abstract

The present invention discloses a method for uplink scheduling access control, which includes: (1) Enhanced uplink MAC control entity at UE side configures the transport format, access service class ASC and uplink scheduling information, and configures the random access type as enhanced uplink random access; (2) Enhanced uplink MAC control entity at UE side sends random access request to the physical layer, the request includes said transport format, ASC, random access type and uplink scheduling information; (3) Based on the transport format, ASC, random access type and uplink scheduling information, the physical layer at UE side selects corresponding uplink synchronous code and physical random access channel resources to initiate random access procedure, and sends uplink scheduling information. The present method solves the problem of controlling the uplink scheduling access in enhanced uplink technology.

Description

Uplink scheduling access control method

Technical field

The present invention relates to the field of wireless communications, and in particular, to an uplink scheduling access control method, which is applied to a time division duplex system including a time division synchronous code division multiple access system. Background technique

In the uplink enhancement technology of the TD-SCDMA (Time Division-Synchronous Multiple Access) wireless communication system, which is one of the standards of the third generation mobile communication system, the uplink enhanced service resource is scheduled by the Node B. Way to distribute. If the user equipment UE (User Equipment) needs to send uplink data in the uplink enhanced mode, the UE needs to apply for the uplink scheduling first, and then wait for the Node B to authorize the uplink enhanced service resource to send. The uplink scheduling access refers to a process in which the UE sends an uplink scheduling application to the Node B without the authorized uplink enhanced service resource. In the TD-SCDMA system, the application process is generally implemented by means of random access.

In the TD-SCDMA system, the random access procedure is controlled by the MAC (Media Access Control) layer and the physical layer. After the introduction of the uplink enhancement technology, the MAC layer has two different entities controlling different random access requests, wherein the MAC-c/sh entity (common/shared MAC layer control entity) controls the transmission channel RACH (random access channel) triggering. The random access request, and the MAC-e entity (uplink enhanced MAC layer control entity) controls the random access request for the uplink scheduling access.

In the TD-SCDMA system, the random access procedure further includes two successive processes, namely an uplink synchronization process and a data transmission process. In the uplink synchronization process, the uplink synchronization code (the uplink synchronization code is also described as a signature), the transmission and reception processes embodies the uplink common channel resource in the random access process - the physical random access channel (PRACH) ) The way in which competition is shared. Therefore, different uplink synchronization codes can be configured for the two different random access requests, but the same PRACH physical channel resources and their configurations are shared. When the MAC initiates a random access request, it needs to send the random access type to the physical layer. In the random access process, different priorities are provided for random access requests of different services and categories. In the TD-SCDMA system, the random access priority is reflected in the access service level, which is the ASC (Access Service Class). In addition, in the TD-SCDMA system, multiple PRACH physical channel resources with different attributes, including transmission time intervals, can be configured at the same time. In the random access process of the TD-SCDMA system, the ASC and the transmission format are usually selected and controlled by the MAC layer entity. When the MAC entity initiates a random access request to the physical layer and triggers the physical layer random access procedure, the MAC entity sends the selected ASC and the transport format to the physical layer. The physical layer then selects the corresponding PRACH physical channel resource to send random access information according to the ASC and the transport format, and the random access resource configuration.

In the uplink enhancement technology of the TD-SCDMA system, the physical channel defined for the random access procedure of the uplink scheduling access is an E-DCH Random Access Uplink Control Channel (E-RUCCH), The E-RUCCH shares the same physical channel resource and its configuration as the PRACH physical channel defined for the RACH random access, and the configuration includes the radio network controller RNC (Radio Network Controller) configured to transmit to the UE through the cell system information broadcast. And information sent to Node B through NBAP. However, compared with RACH random access, there are many different places for random access for uplink scheduling access. Therefore, in order to control the random access procedure of the uplink scheduling access and share the same PRACH physical channel resource and its configuration with the RACH random access procedure, it is necessary to provide a control method for uplink scheduling access. Summary of the invention

The technical problem to be solved by the present invention is to provide an uplink scheduling access control method, which is applied to a time division duplex system including a time division synchronous code division multiple access system, and implements a random access procedure for uplink scheduling access. control. In order to solve the above technical problem, the present invention provides an uplink scheduling access control method, including: (1) an uplink enhanced medium access control MAC layer control entity of a user equipment UE side configures a transmission format and connection of the uplink enhanced access Enter the service level ASC and uplink scheduling information, and configure the random access type as uplink enhanced random access; (2) The uplink enhanced MAC layer control entity on the UE side initiates a random access request to the physical layer, and carries the transport format, the ASC, the random access type, and the uplink scheduling information in the request;

(3) The physical layer at the UE side selects the corresponding uplink synchronization code and the physical random access channel resource to initiate a random access procedure according to the transmission format, ASC, and random access type carried in the received random access request, and sends an uplink scheduling procedure. information. Further, the transmission format is configured as follows:

Configuring and indicating a transmission format and/or a transmission time interval for uplink enhanced random access in the system information that is sent to the UE by the radio network controller RNC through the cell system information broadcast; in step (1), the UE The uplink enhanced MAC layer control entity of the side configures the transport format as the transport format indicated in the system information or the transport format with the transmission time interval indicated in the system information. Further, in the step (1), the transmission format is configured as follows: The UE-side uplink enhanced MAC layer control entity performs a modulo operation according to the number of transmission formats of the random access channel in the UE identifier and the system information. And selecting a transmission format to be configured; or the UE-side uplink enhanced MAC layer control entity performs a modulo operation according to the number of transmission time intervals of the random access channel in the UE identifier and the system information, and selects a transmission time interval. And select and configure a transmission format with the transmission time interval. Further, the UE identifier is one or a combination of an international mobile subscriber identifier, a universal mobile communication system wireless network temporary identifier, and a cell wireless network temporary identifier. Further, in the step (1), the UE-side uplink enhanced MAC layer control entity selects a transmission format from a plurality of transmission formats having different transmission time intervals in the system information. Further, the UE side uplink enhanced MAC layer control entity selects a transmission format as: random selection, priority selection according to service related priority and/or transmission format, and length selection according to transmission time interval in the transmission format. , or a combination of the above. Further, in the step (1), the configuration of the ASC includes: The uplink enhanced MAC layer control entity on the UE side determines the uplink enhanced access request according to the ASC configured by the current cell and the MAC logical channel priority MLP of all the service logical channels involved in the uplink enhanced access request. ASC. Further, comparing the ASC with the lowest priority among all available ASCs in the cell, and the MLP with the highest priority among the MLPs of all logical channels, the uplink enhanced MAC layer control entity on the UE side selects a relatively high one of the two. The priority is used as the ASC for the uplink enhanced access request. Further, the ASC is configured as follows:

The ASC that is used to enhance the access request is configured by the RRC layer through the system information or the RRC message. The uplink enhanced MAC layer control entity on the UE side in the step (1) directly uses the ASC. Further, the system applying the uplink scheduling access control method is a time division duplex system including a time division synchronous code division multiple access system.

The method clarifies the parameters to be configured in the random access process of the uplink scheduling access control and the configuration method thereof, and provides a method for the physical layer to perform the random access process control according to the parameters, thereby solving the uplink in the uplink enhanced technology. Scheduling access control issues.

BRIEF abstract

1 is a flow chart of an embodiment of the present invention.

Preferred embodiment of the invention

The present invention will be described in detail below with reference to the TD-SCDMA system in conjunction with the accompanying drawings and specific embodiments. As shown in FIG. 1, this embodiment includes the following steps. This is for convenience of explanation only, and the execution order of step 1, step 2 and step 3 may be reversed, and the order does not indicate a strict sequence of time.

Step 1: The uplink enhanced MAC layer control entity on the UE side configures the uplink enhanced access Transmission format, where the main configuration transmission time interval;

In the uplink enhancement technology of the TD-SCDMA system, the random access procedure of the uplink scheduling access shares the same PRACH physical channel resource and its configuration with the RACH random access procedure. The information of the PRACH physical channel resource is configured according to the transmission format of the RACH transport channel, and the RACH and the corresponding PRACH physics of multiple transport formats can be simultaneously configured in the information that is sent by the RNC to the UE. Channel resources. Therefore, in the RACH random access procedure, the UE-side uplink enhanced MAC layer control entity needs to select an appropriate transmission format according to the configuration information and the service data to be transmitted through the RACH, including a transmission time interval (TTI) and a transmission block size. The number of transport blocks, etc. However, in the random access process of the uplink scheduling access, that is, the E-RUCCH random access process, since no service data needs to be sent, the information to be transmitted is the scheduling information with a fixed format and different contents, and therefore, the E-RUCCH is randomly Access, no corresponding transport format configured. However, in order to share the same PRACH physical channel resource and its configuration in the physical layer and the RACH random access procedure, and the data transmission process, the UE-side uplink enhanced MAC layer control entity sends an E-RUCCH random access request to the physical layer. The transport format must be indicated. In the random access process of the physical layer, the control is mainly related to the transmission time interval in the transmission format. Therefore, for the E-RUCCH random access, the UE-side uplink enhanced MAC layer control entity actually needs to select and determine the transmission time interval. Then, according to the transmission time interval and the system information configuration, a transmission format is selected, or when the transmission format is selected, the transmission time interval is selected as the main selection content. In the E-RUCCH random access request message sent to the physical layer, the transport block size and the number of transport blocks in the transport format have no practical meaning, and the physical layer can be ignored.

However, since the E-RUCCH random access does not have a transport block of service data, the transport format and its transmission time interval cannot be selected according to the transport block size and number. For the case of a transmission format configured with multiple transmission time intervals, the UE-side uplink enhanced MAC layer control entity may select the transmission format and the transmission time interval of the E-RUCCH random access according to one of the following methods:

Method 1: In the system information that is sent by the RNC to the UE through the cell system information broadcast, in one of the transmission formats having different transmission time intervals, one of the transmission formats and the transmission time interval are configured and used for E- RUCCH random access. Then, the UE-side uplink enhanced MAC layer control entity may select the transmission format and its corresponding transmission time interval according to the system information. Line E-RUCCH random access. The transmission format or the transmission time interval may also be configured and indicated in the system information, and the UE-side uplink enhanced MAC layer control entity may directly select the transmission format in the system information, or select one according to the transmission time interval in the system information. The transmission format of the transmission time interval.

Method 2: The UE-side uplink enhanced MAC layer control entity selects a transmission format according to the number of RACH transmission formats or the number of transmission time intervals in the UE identifier and system information, or selects a transmission time interval, and selects one type. The transmission format with this transmission time interval. The UE identifier may include an IMSI (International Mobile Subscriber Identifier), a U-RNT Universal Mobile Telecommunications System (WLAN) temporary identifier, a C-RNTI (Cell Radio Network Temporary Identity), and the like. Specifically, if the N transmission formats are numbered 0, 1...N-1, the transmission format is selected by using the result of the UE's IMSI mod N (IMSI divided by N).

Method 3: The UE layer uplink enhanced MAC layer control entity selects a transmission format from a plurality of transmission formats having different transmission time intervals in the system information. The method may further comprise: randomly selecting; selecting according to a priority of the service-related priority and/or the transmission format; selecting according to the length of the transmission time interval in the transmission format; or a combination of these methods. For example, select the transmission format with the highest priority or select the transmission format with the shortest transmission interval.

Step 2: The UE side uplink enhanced MAC layer control entity configures the ASC of the uplink enhanced access request. The ASC may be determined by the UE-side uplink enhanced MAC layer control entity > the lowest priority ASC configured according to the local cell, and the service logical channel priority involved in the uplink enhanced access request, or may be determined by the RRC (radio resource) The control layer is determined by system information or an RRC message, and is directly used by the UE side uplink enhanced MAC layer control entity.

In the TD-SCDMA system, all available ASCs are configured in the system information of each cell, wherein the smaller the ASC value, the higher the priority. In the process of establishing/reconfiguring radio bearers of RRC (Radio Resource Control) messages, each service logical channel is configured with a MAC logical channel priority (MLP). The uplink scheduling access is related to a certain service, and may include multiple logical channels. Therefore, the UE-side uplink enhanced MAC layer control entity may select an ASC that determines an uplink enhanced access request according to the two configuration information. For example, if the two priority configuration information are comparable (so-called comparability, that is, the definition and value of the two priority information are the same, the usage method is the same, but the different definitions are different because of the common usage fields. Concept only), then Among the two priorities of the lowest priority ASC among all available ASCs and the MLP of the highest priority among the MLPs of all logical channels, a relatively higher priority is selected as the ASC of the uplink enhanced access request. The RRC layer may also configure the ASC used by the UE for the uplink enhanced access request by using the system information or the RRC message, and the UE-side uplink enhanced MAC layer control entity directly uses the ASC.

Step 3: The uplink enhanced MAC layer control entity on the UE side configures the random access type to uplink enhanced random access, and configures uplink scheduling information.

In the TD-SCDMA system, different uplink synchronization codes are configured for the above two different random access requests, but the same PRACH physical channel resources and their configurations are shared. Therefore, when the MAC initiates a random access request, it needs to send the random access type to the physical layer.

In the random access request message sent to the physical layer, in addition to the above-mentioned transport format, ASC, and random access type, it is necessary to include uplink scheduling information (SI) to be transmitted in the E-RUCCH random access procedure. The uplink scheduling information is configured by an uplink enhanced MAC layer control entity on the UE side.

Step 4: The uplink enhanced MAC layer control entity on the UE side initiates a random access request to the physical layer. The request message includes the contents of the selection determination and configuration in steps 1, 2 and 3.

Step 5: The physical layer of the UE side selects a corresponding uplink synchronization code and a PRACH physical resource according to the transmission format, the ASC, and the random access type to initiate a random access procedure, and sends uplink scheduling information.

After receiving the random access request, the physical side of the UE side according to the transmission format in the request message, the ASC, the random access type, and the configuration information in the system information. The corresponding uplink synchronization code and the PRACH physical resource are selected to initiate a random access procedure. The random access procedure is similar to the random access procedure before the introduction of the uplink enhancement technique by the TD-SCDMA system in the 3GPP (3rd Generation Partnership Project) standard.

The configuration information in the system information used in the MAC layer and the physical layer of the UE is configured by the RRC layer on the UE side to receive the system information and then configured to the MAC layer and the physical layer.

In view of the similarity of the uplink enhancement techniques, the method of the present invention can also be applied to uplink enhancement techniques of other systems in the existing 3GPP specifications, such as 3.84 Mcps TDD (Time Division Duplex), 7.68 Mcps TDD system. Industrial applicability

The method clarifies the parameters to be configured in the random access process of the uplink scheduling access control and the configuration method thereof, and provides a method for the physical layer 4 to perform random access process control according to the parameters, thereby solving the uplink enhancement technology. The control problem of uplink scheduling access.

Claims

Claim

An uplink scheduling access control method, including:

(1) The uplink enhanced medium access control MAC layer control entity on the UE side of the user equipment configures the transmission format, access service level ASC, and uplink scheduling information of the uplink enhanced access, and configures the random access type as uplink enhanced random. Access

(2) The uplink enhanced MAC layer control entity of the UE side initiates a random access request to the physical layer, and carries the transport format, the ASC, the random access type, and the uplink scheduling information in the request;

(3) The physical layer on the UE side selects the corresponding uplink synchronization code and the physical random access channel resource to initiate a random access procedure according to the transmission format, ASC, and random access type carried in the received random access request, and sends an uplink scheduling. information.

2. The method according to claim 1, wherein the transmission format is configured as follows:

Configuring, in the system information that the radio network controller RNC broadcasts to the UE by using the cell system information broadcast, a transmission format for uplink enhanced random access and/or a transmission time interval P鬲; in step (1), The uplink enhanced MAC layer control entity on the UE side configures the transport format as the transport format indicated in the system information or the transport format with the transmission time interval indicated in the system information.

The method according to claim 1, wherein in the step (1), the transmission format is configured as follows:

The UE-side uplink enhanced MAC layer control entity performs a modulo operation according to the number of transmission formats of the random access channel in the UE identifier and the system information, and selects one transmission format to be configured; or the UE side uplink enhanced MAC layer control The entity performs a modulo operation according to the number of transmission time intervals of the random access channel in the UE identifier and the system information, selects a transmission time interval, and selects and configures a transmission format having the transmission time interval.

The method according to claim 3, wherein the UE identifier is one or a combination of an international mobile subscriber identifier, a universal mobile communication system wireless network temporary identifier, and a cell wireless network temporary identifier.

The method according to claim 1, wherein in the step (1), the UE-side uplink enhanced MAC layer control entity has multiple transmission formats with different transmission time intervals in the system information. Choose a transmission format yourself.

The method according to claim 5, wherein the UE side uplink enhanced MAC layer control entity selects a transmission format as: a random selection, a priority according to a service-related priority, and/or a transmission format. Select, according to the length of the transmission time interval in the transmission format, or a combination of the above.

The method according to claim 1, wherein in the step (1), the configuration of the ASC comprises:

The uplink enhanced MAC layer control entity on the UE side determines the uplink enhanced access request according to the ASC configured by the current cell and the MAC logical channel priority MLP of all the service logical channels involved in the uplink enhanced access request. AS (:.

The method according to claim 7, wherein the ASC with the lowest priority among all the available ASCs in the current cell and the MLP with the highest priority among the MLPs of all the logical channels are compared, and the uplink on the UE side is The enhanced MAC layer control entity selects a relatively high priority among the two as the ASC of the uplink enhanced access request.

The method according to claim 1, wherein the ASC is configured as follows:

The ASC that is used to enhance the access request is configured by the RRC layer through the system information or the RRC message. The uplink enhanced MAC layer control entity on the UE side in the step (1) directly uses the ASC.

The method according to any one of claims 1-9, characterized in that the system applying the uplink scheduling access control method is a time division duplex system including a time division synchronous code division multiple access system.