KR101353632B1 - EDCA Communication system, Station and Access point therefor and Communication method thereof - Google Patents

Abstract

The present invention relates to a channel contention setting method for wireless communication in consideration of terminal state information. According to an aspect of the present invention, there is provided a wireless communication in which a plurality of terminals obtain data transmission resources based on contention, including: a base station for controlling communication; And a terminal device connected to the base station to transmit and receive data: the terminal device transmits terminal state information indicating a state of the terminal device to the base station, and the base station receives the received terminal state information. Set the channel competition method using. According to the present invention as described above, it is possible to maintain a channel contention scheme in consideration of the state of the terminal has the advantage of minimizing the power consumption of the terminal.

Battery, Wireless, Channel Competition, TXOP

Description

Competitive-based terminal and base station for transmitting and receiving data, including the system and competition-based data transmission method {EDCA Communication system, Station and Access point therefor and Communication method

1 is a schematic diagram illustrating an EDCA channel approach;

FIG. 2 is a schematic view showing a state of competition for each AC in the station in the EDCA system. FIG.

3 is a schematic diagram illustrating EDCA TXOP bursting;

4 is a block diagram illustrating a data structure of terminal state information according to a specific embodiment of the present invention.

5 is a schematic diagram illustrating the structure of an HCF super frame in a contention period and a contention period.

6 is a block diagram showing the structure of a DATA frame according to a specific embodiment of the present invention.

7 is a flowchart illustrating a competition-based data transmission and reception method according to a specific embodiment of the present invention.

8 is a flowchart illustrating a contention-based data transmission / reception method according to another specific embodiment of the present invention.

The present invention relates to a channel contention setting method for wireless communication in consideration of terminal state information.

Wireless LANs are widely used in a variety of wireless user environments such as home networks, enterprise wireless networks and hot spots. Existing commercial wireless LAN is an extension of Ethernet and provides only Best Effort service based on IEEE 802.11b standardized in 1999. However, wireless LAN users want complete multimedia stream delivery without loss of transmitted data. In particular, new applications such as video or multimedia streaming require quality of service (QoS) in wireless LAN environments.

Continuous user demand for bandwidth expansion is leading to increased congestion of the entire wireless network and a decrease in the relative transmission rate. As a result, network administrators need a new mechanism to ensure that applications that require strict QoS are required even in highly congested networks, and this requirement has resulted in the development of a medium access control (MAC) protocol that is more advanced than in existing wireless LANs .

The 802.11 MAC defines a Distributed Coordination Function (DCF) and a Point Coordination Function (PCF). That is, the transmission medium can operate in both DCF, which is a contention mode, and PCF, which is a contention free mode. DCF is an asynchronous transmission method that provides the basic media access method of 802.11 MAC and is implemented in all commercial wireless LAN products. DCF does not take into account the priority among stations (hereinafter referred to as " STA ") in wireless medium access. The characteristics of such a DCF can not reflect the transmission of various types of data traffic, and thus can not support the QoS requested by the user.

The synchronous transmission scheme is implemented by the PCF as a medium access method through polling. The PCF uses a centralized polling function that directly controls the services of all STAs by the AP by positioning the PC (Point Coordination) function in a central access point (hereinafter referred to as "AP"). That is, the AP periodically polls the combined STAs to give each STA an opportunity to send frames.

The existing 802.11 Medium Access Control (MAC) has many problems in supporting wireless LAN QoS (Quality of Service). Distributed Coordination Function (DCF), an essential feature of 802.11 MAC, does not provide any functionality for QoS support. Therefore, when the DCF scheme is used, all data traffic is provided in the order of arriving at the transmission queue and processed in the best effort manner.

Unlike DCF, PCF (Point Coordination Function) of 802.11 MAC is developed to support real-time traffic service.

That is, a PC (Point Coordinator) located in the AP in the PCF scheme simply defines a scheduling algorithm based on a round-robin scheme for polling. However, since there are various types of traffic that require differentiated QoS, the round robin algorithm that cannot give priority to traffic has a problem that is not sufficient to support it.

In addition, if the size of the super frame is small, there is a problem that repetition of a contention period and a contention free period can cause considerable overhead.

In addition, in a conventional MAC, the transmission of a beacon frame or the time of a superframe may be changed. The PC prepares a beacon frame to be transmitted after TBTT (Target Beacon Transmission Time), and transmits a beacon frame if the medium is spaced during the PISF (Point Inter Frame Space). However, although the STAs can not complete the frame transmission in the upcoming TBTT, they may initiate transmission, which may result in delayed beacon frame transmission.

The delay of the beacon frame, which should be transmitted immediately after the TBTT, eventually delays the transmission of the prototyped frame that should be transmitted in the contention-free period. This problem causes a time delay that is difficult to predict in a noncontacting cycle, which has a problem of seriously affecting QoS.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to set up a channel contention method including state information of a terminal device in a contention-based channel access method of wireless communication. It is to provide a communication system and a method of setting a competition method thereof.

Another object of the present invention is to provide a wireless communication system and a method of setting a contention method thereof, which continuously provide changed base state information to a base station to maintain an optimal channel contention method.

In addition, another object of the present invention is to provide a wireless communication system and a method for setting a contention method thereof so as to set an optimal channel contention method according to a terminal state so that power consumption can be minimized from a terminal device point of view.

According to a feature of the present invention for achieving the above object, the present invention provides a wireless communication in which a plurality of terminals obtain data transmission resources based on the competition, the base station for controlling the communication; And a terminal device connected to the base station to transmit and receive data: the terminal device transmits terminal state information indicating a state of the terminal device to the base station, and the base station receives the received terminal state information. Set the channel competition method using.

In this case, the terminal state information includes at least one of battery remaining amount information, CPU load information, or temperature information of the terminal device.

The battery remaining amount information, CPU load amount information, and temperature information may be divided into four groups, respectively, and may be represented by two bits of data representing each group.

In addition, the base station may set a channel contention scheme such that a larger battery remaining amount, a lower CPU load and a lower temperature, and a shorter transmission waiting time according to the transmitted terminal state information.

In addition, the channel contention method may be configured to set a channel contention parameter value to correspond to the terminal state information.

In this case, the channel contention parameter may include at least one of AIFS, CWmin, or CWmax that determines the back off time.

When the base station determines that resetting of the channel contention scheme is necessary from the received terminal state information, the base station may transmit data by resetting the channel contention parameter value based on the received terminal state information.

Meanwhile, the terminal state information may include the QUEUE size of the terminal to be serviced.

In addition, the base station may set a channel contention parameter value such that a transmission waiting time is shorter as the amount of data stored in the QUEUE is smaller according to the transmitted terminal state information.

Meanwhile, in the wireless communication in which a plurality of terminals obtain a data transmission resource based on contention, the present invention transmits state information of a terminal device to a base station, and transmits data transmitted by a channel contention scheme set by the base station. And a terminal device for receiving contention-based data transmission and reception.

In addition, the present invention is a wireless communication in which a plurality of terminals obtain a data transmission resource based on the competition, receiving the terminal state information transmitted from the terminal device, and sets the channel contention scheme using the terminal state information, It includes a base station for contention transmission and reception of data to transmit data through the established channel contention scheme.

In this case, when it is determined that resetting of the channel contention scheme is necessary from the received terminal state information, the base station resets the channel contention parameter value and transmits data based on the received terminal state information. It includes a base station for transmitting and receiving data.

In addition, in a wireless communication in which a plurality of terminals obtain data transmission resources based on contention, (I) the terminal transmitting terminal status information to the base station; (II) the base station receiving terminal status information from the terminal apparatus; (III) setting, by the base station, a channel contention scheme using the received terminal state information; (IV) transmitting the set channel contention scheme to a terminal; And (V) the terminal accessing to obtain a data transmission resource in the established channel contention scheme.

In addition, the present invention includes a contention-based data transmission / reception method of performing steps (I) to (V) repeatedly.

In this case, the terminal state information may include the amount of data stored in the buffer of the terminal.

On the other hand, the base station may set the channel contention scheme so that the transmission standby time is shorter as the amount of battery remaining, the CPU load and temperature are lower, and the amount of data stored in the terminal buffer is smaller according to the transmitted terminal state information. .

The present invention relates to a wireless communication in which a plurality of terminals obtain a data transmission resource based on contention, the method comprising: receiving channel contention information transmitted from a base station to a plurality of terminals; Accessing to obtain a resource capable of transmitting data according to the received contention information; Transmitting data including terminal status information to the base station; Receiving channel contention information changed according to the terminal state information from a base station; And accessing to obtain data transmission resources according to the changed channel contention information.

In addition, the present invention provides a wireless communication in which a plurality of terminals obtain data transmission resources based on contention, the method comprising: receiving terminal state information from a terminal device; Setting a channel contention scheme using the received terminal state information; And a contention-based data transmission / reception method including transmitting the established channel contention scheme to the terminal.

According to the present invention having the above-described configuration, the channel contention scheme can be maintained in an optimal state, and accordingly, there is an advantage of minimizing power consumption of the terminal device.

The present invention includes state information of a terminal device in a channel contention parameter for guaranteeing QoS (Quality of Service) of wireless communication. The scope of the present invention is not limited to the contents of the IEEE 802.11e standard. For example, let's look at the example applied in the wireless communication according to the IEEE 802.11e standard.

Accordingly, the AP of the present specification is an example of a base station, and the EDCA parameter is an example of a channel determination parameter.

In addition, the setting of the channel determination method of this specification means setting a back off time by setting channel determination parameters, or adjusting the continuous time of data transmission by setting TXOP limit.

Hereinafter, a specific embodiment of a wireless communication system, a terminal device and an access point, and a method for setting a channel contention method thereof according to the present invention as described above will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram illustrating an EDCA channel approach scheme, FIG. 2 is a schematic diagram illustrating race conditions for each AC within a station in an EDCA scheme, FIG. 3 is a schematic diagram illustrating an EDCA TXOP bursting, and FIG. FIG. 5 is a schematic diagram illustrating a data structure of terminal state information according to a specific embodiment, and FIG. 5 is a schematic diagram illustrating a structure of an HCF superframe of a contention period and a contention period, and FIG. 6 is a data view according to a specific embodiment of the present invention. 7 is a flowchart illustrating a structure of a frame, and FIG. 7 is a flowchart illustrating a competition-based data transmission / reception method according to a specific embodiment of the present invention, and FIG. 8 is a competition-based data transmission and reception according to another specific embodiment of the present invention. A flowchart illustrating the method.

In order to provide more advanced QoS in a wireless LAN, an 802.11e MAC supplementing the existing 802.11 MAC is provided.

 IEEE 802.11e defines EDCA and HCCA that can support QoS at the MAC layer of wireless LAN based on DCF transmission method of 802.11 MAC, and it is a new wireless LAN MAC protocol that can transmit delay-sensitive traffic in addition to best effort service. to provide.

802.11e defines HCF (Hybrid Coordination Function) based on existing 802.11 MAC protocol DCF and PCF. HCF includes a new media access mechanism to improve the QoS of wireless LANs and can transmit QoS data in both competing and noncopying cycles. Hereinafter, a QoS STA (QSTA: QoS Station) represented by 802.11e refers to a station that supports QoS, and a QoS AP (QAP: QoS AP) represents an access point supporting QoS.

The HCF has two modes of operation, one is EDCA (Enhanced Distributed Channel Access) based on contention, and the other is HCFC Controlled Channel Access (HCCA) using a contention-based channel access method using a polling mechanism. to be.

The EDCA and the HCCA are controlled by an HC (Hybrid Coordinator) located at an access point (AP), and are compatible with the existing 802.11 MAC using DCF and PCF. The EDCA provides prioritized traffic similar to the DiffServ of the wired network for QoS support (Supported QOS), while the HCCA provides Parameterized Traffic similar to IntServ for QoS guaranteed (Guaranteed QoS) do.

The EDCA scheme is used to support priority based QoS in the infrastructure mode and the ad hoc mode. That is, the EDCA provides a differentiated channel access function for frames having different priorities from higher layers, while the HCCA provides a parameter-based QoS in an infrastructure mode.

The 802.11e MAC establishes a virtual connection between two stations (hereinafter referred to as STAs) before transmitting data to provide parameter QoS. The characteristics of data to be actually transmitted and the parameters that require QoS are negotiated and exchanged in the process of setting the traffic stream. AP allocates wireless bandwidth to each STA based on the exchanged QoS parameters and performs frame transmission scheduling for polling frame and downlink frame transmission.

The TXOP (Transmission Opportunity) of the 802.11e MAC is used to grant and guarantee a certain time to transmit a frame to a specific STA. The TXOP acquisition is achieved by either succeeding in the EDCA competition or by receiving a QoS CF-Poll frame from the AP, the former being the EDCA TXOP and the latter being the polled TXOP.

As described above, a certain time may be given or a transmission time may be forcibly limited by any one STA to transmit a frame using TXOP. The transmission start time and the maximum transmission time of the TXOP are determined by the AP. The STA is informed by the beacon frame in the case of the EDCA TXOP and the QoS CF-Poll frame in the case of the fold TXOP.

While the EDCA is used only in the competition cycle, the HCCA can theoretically operate in both the competition cycle and the non-competition cycle, but is preferably used only in the competition cycle.

Hereinafter, look at the EDCA method to which the present invention is applied.

As described above, EDCA, which is a contention-based channel access method, enhances the existing DCF to allow differentiated media access for eight types of user priority frames. In Table 1 below, the user priorities are listed in the table. Each frame arriving from the upper layer to the MAC layer has a specific user priority value, and each QoS data frame MAC header carries a user priority value.

- User priority and AC mapping - User priority 802.1D Designation AC (Access Category) Designation One BK AC_BK Back Ground 2 - AC_BK Back Ground 0 BE AC_BE Best Effort 3 EE AC_BE Best Effort 4 CL AC_VI Video 5 VI AC_VI Video 6 VO AC_VO Voice 7 NC AC_VO Voice

For transmission of QoS data frames containing these priorities, an 802.11e QoS STA implements 4 Access Categories (see Table 1). The user priority of frames arriving at the MAC layer is assigned to one AC corresponding to each other. The user priorities listed in Table 1 are specified in the IEEE 802.1D bridge standard. Every AC has its own transmission queue and AC parameters, with different AC priority values implemented from differently set AC parameter values.

Basically, EDCA uses AIFS [AC], CWmin [AC], and CWmax [AC] instead of DIFS, CWmin, and CWmax used by DCF in the competition for transmitting frames belonging to AC. AIFS [AC] is determined by the SIFS + AIFS [AC] slot time, where AIFS [AC] is an integer value greater than zero. These EDCA parameter values will be discussed below.

When the collision between STAs occurs during frame transmission, the EDCA backoff process of generating a new backoff counter is similar to the existing DCF. That is, in a contention-based media access control method, if a collision occurs due to contention, a backoff procedure is entered. In the present invention, a parameter taking the terminal state into consideration in the medium access control is performed to perform the backoff procedure reflecting the terminal state.

As shown in FIG. 1, the channel access method of the EDCA is similar to DCF. However, different AIFS (Arbitration Inter Frame Space) and CW are maintained for each AC. Here, AIFS should be larger than PIFS and DIFS, which is set to be at least larger than SIFS time, in order to protect transmission such as ACK frames.

Values such as AIFS [AC], CWmin [AC], and CWmax [AC], which are referred to as the EDCA parameter set, can be notified to each STA by a beacon frame by the AP. Basically, the smaller the value of AIFS [AC] and CWmin [AC], the higher the priority. Therefore, the shorter the channel access delay, the more bandwidth is used in a given traffic environment.

Information included in the EDCA parameter may include ACI (Access Category Identification) / Arbitration Inter Frame Spacing Number (AIFSN), ECWmin / ECWmax and TXOP Limit for each AC. Where ACI is an identifier of the corresponding AC, and AIFSN is a slot that represents the delay before QAP and QSTA start transmitting for the AC's traffic or call the backoff procedure defined by the specification. As a number, the actual Arbitration Inter Frame Space (AIFS) is a time obtained by multiplying an AFISN by one slot time and adding a Short Inter Frame Space (SIFS) time.

The EDCA parameters are an important means used to differentiate channel access in various user priority traffic. In addition, the appropriate setting of the EDCA parameter values, including each AC-specific parameter, optimizes network performance while at the same time achieving the transmission effect of priority of traffic. Therefore, the AP is required to perform overall management and coordination functions on the EDCA parameters to ensure fair access to all STAs participating in the network.

As shown in FIG. 2, the four per-AC transmission queues defined in the 802.11e MAC serve as individual EDCA contention entities for wireless medium access within one STA. One AC maintains its own backoff counter with its AIFS value. If there is more than one AC that has been backed off at the same time, the collision between the ACs is adjusted by the Virtual Collision Handler. The highest priority frame is first selected and transmitted for contention between STAs, and the other ACs update the backoff counter by increasing the CW value.

 As mentioned earlier, 802.11e determines the transmission time based on the TXOP when a particular STA initiates a transmission. 802.11e AP transmits EDCA parameters such as AIFS [AC], CWmin [AC], CWmax [AC] and TXOP Limit [AC] which is EDCA TXOP time to beacon frame to each STA.

As shown in FIG. 3, during the EDCA TXOP Limit time, multiple frames can be simultaneously transmitted in the SIFS interval between the ACK and the consecutive frame transmission. The 'EDCA TXOP Bursting' '.

Two QoS data frames including a priority are transmitted during the TXOP Limit time. It can be seen that the two QoS data frames and the ACK frame are transmitted within the TXOP limit time determined by the AP. EDCA TXOP bursting does not necessarily affect the performance of the entire network by EDCA TXOP bursting because it must comply with the TXOP limit when transmitting multiple frames. Therefore, selecting the appropriate TXOP Limit value can improve overall network performance.

On the other hand, the terminal state information described above has a configuration as shown in FIG.

As shown in the figure, the battery remaining amount information, the CPU load amount information, and the temperature information each occupy 2 bits and have an extra storage space.

Once the traffic stream (TS) is established, the HC tries to provide the contracted QoS by allocating the required bandwidth for the established traffic stream between the AP and the STA. In the non-contention period of the HCCA, the HC has overall control over the medium, and if necessary in the contention period, the QoS CF-Poll frame is transmitted after the idle time of PIFS (Point Inter Frame Space) . That is, in order to allocate the fold TXOP even in the contention period, the control right of the medium is acquired by transmitting the QoS CF-Poll frame. Therefore, the HCF super frame that is periodically repeated includes both the non-competition period and the contention period (see FIG. 5).

Meanwhile, the UE status information needs to be transmitted to the AP, which changes the UE status information to a time varying value.

The present invention uses a DATA frame as a method for continuously transmitting the UE status information to an AP.

That is, the STA adds the terminal status information area to the DATA frame transmitted to the AP and transmits the DATA frame including the terminal status information to the AP.

To this end, the DATA frame according to the present invention has a configuration as shown in FIG. That is, as shown in the figure, the UE state information is included in a DATA frame header area including Frame control, Duration ID, Address 1, Address 2, Address 3, Sequence Control, Address 4 and QoS control.

In this case, the terminal state information, as described above, has a structure as shown in FIG.

At this time, the area added by the present invention is a terminal status area in which STA status information is stored. The status information stored in the terminal status area may be divided into groups and stored.

The terminal status information may include various information of the STA, but the STA battery level information, the CPU load information, and the temperature information will be described as an example.

First of all, the battery remaining amount information can be divided into four groups to divide the battery information into 2-bit data. (Of course, the data can be stored as more detailed data. However, considering the data amount of the terminal status information, Divide into groups of.)

For example, as shown in Table 2 below, when the remaining amount of the battery is less than 30%, it is expressed as '11' as one group, when it is less than 30% and less than 50% 3 groups are represented by '01', and when they are 75% or more, 4 groups are represented by '00'.

Battery level (%) group Show data Less than 30 One 11 30 to less than 50 2 10 50 to less than 75 3 01 75 or more 4 00

Next, referring to the CPU load information, as shown in Table 3 below, when the CPU load is 75% or more, '11' is indicated as one group, and when the CPU load is 50% or more and less than 75% If they are less than 30% and less than 50%, they can be represented as '01' as 3 groups and as '00' as 4 groups if they are less than 30%.

CPU load (%) group Show data 75 or more One 11 50 to less than 75 2 10 30 to less than 50 3 01 Less than 30 4 00

Referring to the temperature information, as shown in Table 4 below, when the temperature can not be measured, it is represented as '11' as one group. When the temperature is very high, it is represented as '10' Group as '01', and when the temperature is appropriate, it can be expressed as '00' as 4 groups.

Temperature group Show data Not measurable One 11 Very high 2 10 Somewhat high 3 01 Proper temperature 4 00

At this time, since the appropriate temperature and the degree of the high temperature depend on the type and characteristics of the terminal, it is preferable that the temperature and the degree of high are set differently according to the characteristics of each device.

According to a specific embodiment of the present invention, the channel competition method is set such that the lower the remaining battery capacity, the higher the CPU load, and the higher the temperature, the longer the transmission standby time. Of course, at this time, it is also possible to set the channel contention scheme to shorten the continuity of the data transmission.

In addition, the terminal state information of the present invention may include a QUEUE SIZE indicating the amount of data stored in the buffer of the terminal.

When the amount of data stored in the buffer of the terminal is large (the larger the QUEUE SIZE), since there is a relatively small need to receive data in preference to other terminals, the channel contention scheme is set to have a long transmission standby time.

Hereinafter, a contention-based data transmission / reception method according to the present invention will be described in detail with reference to the accompanying drawings.

7 is a flowchart illustrating a method of setting a channel contention scheme according to a specific embodiment of the present invention.

As shown in the drawing, in order to set the channel contention scheme according to a specific embodiment of the present invention, the terminal first creates a data frame including its own state information and transmits it to the base station (S100).

The base station receiving the data frame determines whether the channel contention parameter needs to be reset using the terminal state information included in the data frame (S120). That is, it is determined whether the terminal state information is changed and needs to apply a new parameter.

As a result of the determination, when a new channel contention parameter is required, the base station adjusts the channel contention parameter (EDCA parameter) using the received terminal state information (S130).

The newly established channel contention scheme is transmitted to the terminal (S140).

Thereafter, data is transmitted to the terminal according to the changed channel contention scheme (S150).

The process of steps 100 to 150 may be repeated periodically or aperiodically, which is to reflect this because the terminal state information changes with time. Here, the aperiodic means that the base station requests the terminal state information from the terminal when the base station determines that the update of the channel contention scheme is necessary and the channel contention scheme is updated.

Meanwhile, according to another embodiment of the present invention, as shown in FIG. 8, a channel contention scheme may be set using the queue size by receiving a queue size of the terminal (S110 ′).

Of course, the channel contention scheme may be set in consideration of the terminal state information and the queue size, and the queue size may be one element constituting the terminal state information.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

In the competition-based data transmission and reception system and communication method according to the present invention as described in detail above, the following effects can be expected.

That is, since data is transmitted by setting a channel contention scheme using the state information of the terminal device, there is an advantage in that the data can be optimally transmitted in consideration of the state of the receiver.

In addition, the present invention continuously transmits the terminal state information to the AP, and the AP updates the channel contention scheme according to the updated terminal state information, which has the advantage of maintaining an optimal contention scheme.

In addition, since the channel contention scheme is set in consideration of the terminal state, excessive operation can be avoided even from the viewpoint of the terminal receiving the data, and thus, power consumption of the terminal apparatus can be reduced.

Claims (33)

In a wireless communication in which a plurality of terminal devices obtain data transmission resources based on competition, A base station for controlling communication; And a terminal device connected to the base station for transmitting and receiving data, The terminal device transmits terminal state information indicating the state of the terminal device to the base station, And the base station sets a channel contention scheme using the received terminal state information. The method of claim 1, The terminal state information, Competitive-based data transmission and reception system, characterized in that it comprises any one or more of the remaining battery information, CPU load information or temperature information of the terminal device. The method of claim 2, The battery level information, the CPU load information and the temperature information are divided into four groups, each represented by two bits of data representing each group, competition-based data transmission and reception system, characterized in that. The method of claim 3, wherein And the base station sets a channel contention scheme such that a higher battery remaining amount, a lower CPU load amount and a lower temperature, and a shorter transmission waiting time according to the transmitted terminal state information result in shorter transmission latency. 5. The method of claim 4, The setting of the channel contention scheme, And a channel contention parameter value corresponding to the terminal state information. 6. The method of claim 5, The channel competition parameter is, A competition-based data transmission / reception system comprising any one or more of AIFS, CWmin, or CWmax, which determines the back off time. The method according to claim 5 or 6, The base station includes: If it is determined that resetting of the channel contention scheme is necessary from the received terminal state information, And transmitting data by resetting the channel contention parameter value based on the received terminal state information. The method of claim 7, wherein The terminal state information, Contention transmission and reception system, characterized in that it comprises a QUEUE size of the terminal receiving the service. 9. The method of claim 8, The base station includes: And a channel contention parameter value is set such that a transmission latency is shorter as the amount of data stored in the QUEUE is smaller according to the transmitted terminal state information. In a wireless communication in which a plurality of terminal devices obtain data transmission resources based on competition, Transmits the status information of the terminal device to the base station, Contention-based data transmission and reception terminal device characterized in that for receiving the data transmitted by the channel contention scheme set by the base station. 11. The method of claim 10, The terminal state information, Competitive-based data transmission and reception terminal device characterized in that it comprises any one or more of the remaining battery information, CPU load information or temperature information of the terminal device. The method of claim 11, The base station includes: The contention-based terminal device for content transmission and reception, characterized in that the channel contention scheme is set such that the greater the remaining battery capacity, the lower the CPU load and the temperature, the shorter the transmission waiting time according to the transmitted terminal state information. In a wireless communication in which a plurality of terminal devices obtain data transmission resources based on competition, Receiving terminal status information transmitted from the terminal apparatus, Sets a channel contention scheme using the terminal state information; Contention-based base station for transmitting and receiving data, characterized in that for transmitting data through the set channel contention scheme. 14. The method of claim 13, The terminal state information, Comprising a base station for data transmission and reception based on any one or more of the remaining battery information, CPU load information or temperature information of the terminal device. 15. The method of claim 14, The battery level information, the CPU load information, and the temperature information are divided into four groups and represented by two bits of data representing each group. 14. The method of claim 13, The base station includes: The base station for contention-based data transmission / reception, characterized in that a channel contention scheme is set such that a higher battery level, a lower CPU load and a lower temperature, and a shorter waiting time are transmitted according to the transmitted terminal state information. 17. The method of claim 16, The setting of the channel contention scheme, The base station for contention-based data transmission and reception, characterized in that for setting the channel contention parameter value corresponding to the terminal state information. 18. The method of claim 17, The channel competition parameter is, Comprising a base station for data transmission and reception, characterized in that it comprises one or more of AIFS, CWmin or CWmax to determine the back off time. 14. The method of claim 13, The terminal state information, Comprising a base station for data transmission and reception based on the QUEUE size of the terminal receiving the service. 20. The method of claim 19, The base station includes: The base station for contention-based data transmission / reception, characterized in that the channel contention parameter value is set to have a shorter transmission waiting time according to the amount of data stored in the QUEUE according to the transmitted terminal state information. 14. The method of claim 13, The base station includes: If it is determined that resetting of the channel contention scheme is necessary from the received terminal state information, Based on the received terminal state information, the contention-based base station for data transmission and reception, characterized in that for transmitting data by resetting the channel contention parameter value. In a wireless communication in which a plurality of terminal devices obtain data transmission resources based on competition, (I) a terminal device transmitting terminal status information to a base station; (II) the base station receiving terminal status information from the terminal apparatus; (III) setting, by the base station, a channel contention scheme using the received terminal state information; (IV) transmitting the set channel contention scheme to a terminal; And And (V) accessing, by the terminal apparatus, to obtain a data transmission resource in the established channel contention scheme. 23. The method of claim 22, A competition-based data transmission / reception method comprising repeating steps (I) to (V). 24. The method of claim 23, The terminal state information, Competition data transmission and reception method comprising any one or more of the remaining battery information, CPU load information or temperature information of the terminal device. 25. The method of claim 24, The terminal state information, And a data amount stored in a buffer of the terminal device. 26. The method of claim 25, The base station sets a channel contention scheme such that the transmission latency is shorter as the battery level is higher, the CPU load and the temperature are lower, and the amount of data stored in the terminal buffer is smaller according to the transmitted terminal state information. Competition based data transmission and reception method. 27. The method of any of claims 22 to 26, The setting of the channel contention scheme, And a channel contention parameter value corresponding to the terminal state information. 28. The method of claim 27, The channel competition parameter is, A competition-based data transmission / reception method comprising at least one of AIFS, CWmin, or CWmax that determines the back off time. In a wireless communication in which a plurality of terminal devices obtain data transmission resources based on competition, Receiving channel contention information transmitted from the base station to the plurality of terminals; Accessing to obtain a resource capable of transmitting data according to the received contention information; Transmitting data including terminal status information to the base station; Receiving channel contention information changed according to the terminal state information from a base station; And And accessing to obtain a data transmission resource according to the changed channel contention information. In a wireless communication in which a plurality of terminal devices obtain data transmission resources based on competition, Receiving terminal status information from a terminal device; Setting a channel contention scheme using the received terminal state information; And And transmitting the established channel contention scheme to the terminal. The method of claim 29 or 30, The terminal state information, And at least one of battery remaining amount information, CPU load information, temperature information, and QUEUE size information of the terminal device. 32. The method of claim 31, The base station includes: According to the transmitted terminal state information, the contention-based channel contention scheme is set such that the greater the remaining battery capacity, the lower the CPU load and temperature, and the smaller the amount of data stored in the terminal buffer, the shorter the transmission waiting time. How to send and receive data. 33. The method of claim 32, The setting of the channel contention scheme, And a channel contention parameter value corresponding to the terminal state information.

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