CN101252379A - A wireless network media access control system and channel parameter adjustment method thereof - Google Patents

Abstract

The invention discloses a wireless network media access control system and a channel parameter adjustment method thereof. The system includes a base station and a terminal. The terminal includes a measurement module for measuring downlink channel information and storing it in a channel information table; a feedback module for calculating channel information statistics, constructing a channel information report message, and feeding back to the corresponding base station . The base station includes a request module, which is used to select a feedback mode when the base station requires the terminal to feed back current channel information, construct a channel information request message, and send it to the terminal; the first adjustment module is used to control the physical layer to adjust the downlink transmission power; the second An adjustment module is used to determine the power value that each terminal needs to adjust, and save the power adjustment value and the identification of the corresponding terminal in the uplink power adjustment list, count the number of terminals that need to adjust the power, and adjust the uplink transmission power of the corresponding terminal. It enables the wireless network media access control to be well implemented.

Description

A wireless network media access control system and channel parameter adjustment method thereof

technical field

The invention relates to the technical field of wireless communication, in particular to a wireless network medium access control system and a channel parameter adjustment method thereof.

Background technique

Wireless Metropolitan Area Network (802.16 WirelessMAN) is a broadband network capable of providing high-speed wireless access within the metropolitan area (see Carl Eklund, Roger B. Marks, "IEEE Standard 802.16: A Technical Overview of the WirelessMANTM Air Interface for BroadbandWireless Access", IEEE C802.16-02/05, 2002). The IEEE 802.16 working group released IEEE Std 802.16-2004 on October 1, 2004, which defines the air interface physical layer (PHY) and media access control layer (MAC) specifications of the wireless metropolitan area network broadband wireless access system.

IEEE Std 802.16e was released in February 2006, which defines the air interface specification for mobile broadband wireless access systems.

However, the 802.16 protocol, that is, the wireless metropolitan area network protocol standard, only proposes several channel information feedback methods and general power control methods, and does not provide the specific implementation methods of the channel information feedback workflow and power control, making its Wireless network media access control is not well implemented.

Contents of the invention

The problem to be solved by the present invention is to provide a wireless network media access control system and a channel parameter adjustment method thereof, which enable the wireless network media access control to be well realized.

A wireless network access control system provided to achieve the purpose of the present invention includes a base station and a terminal, the terminal includes a measurement module and a feedback module, the base station includes a request module, a first adjustment module and a second adjustment module, wherein :

The measurement module of the terminal is used to measure the downlink channel information and store it in the channel information table according to the area type;

The feedback module of the terminal is used to calculate channel information statistics according to the feedback request of the base station, construct a channel information report message, and feed back downlink channel information to the corresponding base station;

The request module of the base station is used to select a feedback mode when the base station requires the terminal to feed back current channel information, construct a channel information request message, and send it to the terminal;

The first adjustment module of the base station is configured to control the physical layer to adjust the downlink transmission power according to the frame information and the downlink channel information fed back by the terminal;

The second adjustment module of the base station is used to determine the power value that each terminal needs to adjust according to the uplink channel information, and save the power adjustment value and the identification of the corresponding terminal in the uplink power adjustment list. When the base station determines the power value of all terminals When calculating the power adjustment value, count the number of terminals that need to adjust the power, and use different methods to adjust the uplink transmit power of the corresponding terminal according to the number.

The first level of the channel information table includes RSSI queues, default CINR queues, CINR queues organized according to area types, CINR queues organized according to area types and channel usage bitmaps, and CINR queues organized according to preamble types.

The RSSI queue maintains a series of nodes, each node includes a frame number and the RSSI value of the frame, and the RSSI queue also includes fields representing the RSSI mean value and standard deviation for storing statistical results;

The default CINR queue maintains a series of nodes, each node includes a frame number and the CINR value of the frame, and the default CINR queue includes fields representing the CINR mean value and standard deviation at the same time, for storing statistical results;

The CINR queue organized according to the area type includes a series of nodes, each node includes an area type domain and a CINR queue, and the CINR queue organized according to the area type is the same as the default CINR queue;

The CINR queue organized according to the area type and the channel usage bitmap comprises a series of nodes, each node includes an area type field, a channel usage bitmap and a CINR queue, the CINR queue organized according to the area type and the channel usage bitmap and The default CINR queues are the same;

The CINR queue organized according to the preamble type includes a series of nodes, each node includes a preamble type field and a CINR queue, and the CINR queue organized according to the preamble type is the same as the default CINR queue.

The feedback mode is CQICH fast feedback mode, REP-REQ feedback mode and feedback polling IE message request feedback mode.

The terminal also includes a feedback timer for implementing periodic channel information feedback;

When the feedback module of the terminal receives the CQICH allocation IE, it parses the information unit and records the parameters of the information unit, and then creates a feedback timer, resets the feedback timer or Delete the feedback timer; when the feedback timer expires, the feedback module performs statistical calculations on the channel information, constructs a feedback message, and sends it to the base station.

According to different numbers, different methods are used to adjust the transmit power of the corresponding terminal, which is:

If it is 0, it means that no terminal needs to adjust the power, and the processing ends;

If it is 1, it means that only one terminal needs to adjust the transmission power, use the PMC-RSP message to control a single terminal to adjust the transmission power, and the process ends;

If it is greater than 1, it means that there are multiple terminals that need to adjust the transmission power, use the FPC message to control multiple terminals to adjust the transmission power, and the process ends.

In order to realize the object of the present invention, a method for adjusting channel parameters of a wireless network access control system is provided, which includes the following steps:

Step A, the terminal measures the downlink channel information and stores it in the channel information table according to the area type;

Step B, when the base station requires the terminal to feed back the current channel information, select a feedback method, construct a channel information request message, and send it to the terminal; the terminal calculates the channel information statistics according to the feedback request from the base station, constructs a channel information report message, and feeds back Downlink channel information to the corresponding base station;

Step C, the base station controls the physical layer to adjust the downlink transmission power according to the frame information and the downlink channel information fed back by the terminal;

Step D, the base station determines the power value that each terminal needs to adjust according to the uplink channel information, and saves the power adjustment value and the identification of the corresponding terminal in the uplink power adjustment list. When the base station determines the power adjustment value of all terminals, the statistics need According to the number of terminals that adjust the power, different methods are used to adjust the transmit power of the corresponding terminals.

In the step A, the terminal stores the downlink channel information in the channel information table, including the following steps:

Step A1, obtain channel information parameters from the physical layer, including CINR, RSSI, frame number, type, and the terminal saves the information of N frames at most, and enters step A2;

Step A2, calculate the modulus of the frame number to N, assuming that the modulus value n is obtained, enter step A3;

Step A3, first query whether there is a node whose frame number is n in the RSSI queue, if found, update the content of the node with new RSSI information;

If not found, create a new node, assign the frame number to n, assign the RSSI value to a new RSSI value, and add the node to the RSSI queue;

Go to step A4;

Step A4, query whether there is a node whose frame number is n in the CINR queue, if found, update the content of the node with the new CINR information;

If not found, create a new node, assign the frame number to n, CINR value is the new CINR value, and add the node to the default CINR queue;

Go to step A5;

Step A5, according to the channel information type T obtained from the physical layer, perform the following operations:

If T belongs to the leader type, search for a node whose leader type is T in the information queue organized by leader type, if found, add CINR to the CINR queue corresponding to the node in the same way as step A4; if not found, Then create a new node, assign the type to T, and add CINR to the CINR queue corresponding to the node in the same way as step A4;

If T belongs to the area type and the area type is a partially used subchannel and the channel usage bitmap B is not 0, then the lookup is performed in the CINR queue organized by area type and channel usage bitmap The area type is T and the channel usage bitmap is If the node of B is found, add CINR to the CINR queue corresponding to the node in the same way as step A4; if not found, create a new node, assign the area type to T, and assign the channel usage bitmap to B, And add the CINR to the CINR queue corresponding to the node in the same way as step A4;

Otherwise, look for a node whose area type is T in the CINR queue organized by area type, if found, add CINR to the CINR queue corresponding to the node in the same way as step A4; if not found, create a new node, The type is assigned as T, and the CINR is added to the CINR queue corresponding to the node in the same manner as step A4.

In the step B, the base station selects a feedback mode, including the following steps:

When both the base station and the terminal support channel quality information channel CQICH fast feedback, select the CQICH fast feedback mode;

When the channel quality of the terminal is relatively stable, use the REP-REQ message feedback method to request the channel information of the terminal as needed;

When the channel quality of the terminal is unstable, it is necessary to monitor the channel status of the terminal in real time. At this time, a feedback polling IE message is sent to request the terminal to periodically feedback channel information.

In the step B, the terminal uses the report response management message REP-RSP to implement feedback, including the following steps:

Step B11, the terminal receives the report request management message REP-REQ, and enters step B12;

Step B12, analyze the REP-REQ message, record the parameters therein, and enter step B13;

Step B13, comparing the new REP-REQ parameter with the saved REP-REQ parameter, if they are equal, go to step B15; if they are not equal, go to step B14;

Step B14, update the saved REP-REQ parameters to new REP-REQ parameters, and enter step B15;

Step B15, perform statistical calculation on channel information, and enter step B16;

Step B16, after the calculation is completed, a REP-RSP message is constructed according to the calculation result and the saved REP-REQ parameters, and the downlink channel information is reported to the base station, and the processing ends.

In the step B, the terminal uses the channel quality information channel CQICH to realize feedback, including the following steps:

Step B11', the terminal receives the channel quality information channel allocation information unit CQICH allocationIE, and enters step B12';

Step B12', analyze and record the information of the information unit, and enter step B13';

Step B13', check the existing CQICH information list, if the number of nodes is 0, go to step B14'; otherwise go to step B18';

Step B14', judge whether the lifetime duration field in the CQICH allocation IE is 0, if it is 0, the processing ends; otherwise, enter step B15';

Step B15', add the information of the information unit into the CQICH information list, and enter step B16';

Step B16', create a feedback timer, enter step B17';

Step B17', the feedback flag is set to 1, and the processing ends;

Step B18', check whether there is a node identical to the CQICH identifier of the CQICH allocation IE in the CQICH information list, if not, go to step B14'; otherwise, go to step B19';

Step B19', judge the value of the feedback flag, if it is 0, enter step B110'; otherwise, go to step B112';

Step B110', judge whether the duration field in the CQICH allocation IE is 0, if not 0, enter step B111'; otherwise, end the process;

Step B111', update the information in the CQICH list, go to step B16';

Step B112', judge whether the duration field in the CQICH allocation IE is 0, if it is 0, enter step B113'; otherwise, go to step B116';

Step B113', delete the node whose CQICH identifier is the same as the CQICH allocation IE in the CQICH information list, and enter step B114';

Step B114', delete the feedback timer, enter step B115';

Step B115', the feedback flag is set to 0, and the processing ends;

Step B116', update the CQICH information list, enter step B117';

Step B117', reset the feedback timer, and the process ends.

In the step B, the terminal implements feedback according to the feedback request information unit feedback polling IE message, including the following steps:

Step B11″, the terminal receives the feedback polling IE message, starts parsing, and enters step B12″;

Step B12″, detect whether there is information belonging to the terminal in the information unit IE, if yes, enter step B13″; otherwise, the process ends;

Step B13″, analyze and obtain information about the terminal in the IE, and enter step B14″;

Step B14 ″, detect whether there is a node identical to the new IE feedback type in the saved feedback polling IE information list, and enter step B15 ″;

Step B15 ", if finding the same node as the new IE feedback type, go to step B19 "; otherwise, go to step B16 ";

Step B16 "judging whether the lifetime duration parameter in the new IE is 0, if yes, the process ends; otherwise, enter step B17";

Step B17 ", new IE information node is added in the information list, enters step B18 ";

Step B18 ", create a feedback timer, end processing;

Step B19″, judge whether the duration parameter in the new IE is 0, if yes, enter step B110″; otherwise, go to step B113″;

Step B110″, check whether the existing feedback timer has expired, if yes, end the process; otherwise, enter step B111″;

Step B111 ", delete the feedback timer, enter step B112 ";

Step B112 ", delete the found information node from the IE information list, and end the process;

Step B113 ", update the found information node, enter step B114 ";

Step B114″, check whether the existing feedback timer has expired, if yes, enter step B115″; otherwise, go to step B116″;

Step B115", create a feedback timer, and the process ends;

Step B116", reset the feedback timer, and the process ends.

In the step B, if the adjustment of the channel parameters is implemented in the Linux operating system kernel state and the statistical calculation function is realized, then the terminal performs channel information statistical calculation, including the following steps:

Step B21, first create a calculation parameter node, and initialize it, then go to step B22;

Step B22, judging whether there is a CINR parameter in the calculation parameters, if so, go to B24; otherwise go to B25;

Step B23, assign a value to the CINR parameter list item in the calculation parameter node, and enter step B24;

Step B24, judge whether there are RSSI parameters in the calculation parameters, if so, go to step B25; otherwise go to step B26;

Step B25, assign a value to the RSSI parameter list item in the calculation parameter node, and enter step B26;

Step B26, assign the data identifier in the calculation parameter list to the data identifier in the calculation parameter node, and enter step B27;

Step B27, add 1 to the data identifier in the calculation parameter list, and enter step B28;

Step B28, the calculation parameter node is added to the calculation parameter list, and enters step B29;

Step B29, set the call flag, mark the calculation function called by the function, and enter step B210;

Step B210, construct a primitive message according to the calculation parameters, data identifier and call identifier, and pass it to the user state for calculation, and enter step B211;

Step B211, after the calculation is completed, analyze the calculation result primitive, which includes data identification, call identification and calculation results, and enter step B212;

Step B212, search in the calculation parameter list according to the data identifier, and enter step B213;

Step B213, if the node whose data identifier is equal to the resolved data identifier is found, go to step B214; otherwise, it indicates that the calculation result is not the expected result, and the process ends;

Step B214, save the calculation result, and proceed to step B215 from the calculation parameter node found in the calculation parameter list;

Step B215, call the corresponding processing function to feed back the channel information to the base station according to the calling identifier, and the processing ends.

In the step C, the base station controls the downlink transmission power, including the following steps:

In step C1, the base station obtains the downlink channel information fed back by the terminal, and proceeds to step C2;

Step C2, calculating the power adjustment value from the obtained channel information, and proceeding to step C3;

Step C3, adding the power adjustment information to the downlink power adjustment list, and entering step C4;

Step C4, for each area that needs to be enhanced with zone boost, calculate the total zone boost value Z according to the frame information, and calculate the zone boost value of each burst according to the sub-channel ratio of each burst, and enter the step C5;

Step C5, look up the power adjustment value corresponding to each burst from the downlink power adjustment information list, and use it as the enhanced value PBB of each burst, and count the total PBB value P, and enter step C6;

Step C6, judging whether P+Z<=3 is true, if true, go to step C8; otherwise, go to step C7;

Step C7, scale down the PBB in each area and recalculate P, so that P+Z<=3 can be satisfied, and enter step C8;

Step C8, judging whether the sum of zone boost and PBB of each burst is less than or equal to 9, if yes, go to step C10; otherwise, go to step C9;

Step C9, setting the PBB that does not meet the conditional burst as 9-zone boost, and entering step C10;

Step C10, convert the finally obtained PBB value and zone boost value into coded values, and end the return.

In the step D, the base station controls the uplink transmission power of the terminal, including the following steps:

In step D1, the physical layer of the base station measures and obtains the uplink channel information CINR and RSSI of each terminal, and proceeds to step D2;

Step D2, select channel information of a terminal, and enter step D3;

Step D3, determine the power adjustment value according to the signal quality, and enter step D4;

Step D4, judging whether the terminal needs to adjust the power, if yes, go to step D5; otherwise, go to step D6;

Step D5, adding the power adjustment information to the uplink power adjustment list, and entering step D6;

Step D6, judging whether the channel information of all terminals has been detected, if yes, go to step D8; otherwise, go to step D7;

Step D7, get the channel information of the next terminal, go to step D3;

Step D8, counting the number N of terminals that need to adjust power, and proceeding to step D9;

Step D9, if N is 0, go to step D10; otherwise, go to step D11;

Step D10, no terminal needs to adjust the power, and the process ends;

Step D11, if N is 1, go to step D12; otherwise, go to step D13;

Step D12, use the PMC-RSP message to control a single terminal to adjust the transmission power, and the processing ends;

Step D13, use the FPC message to control multiple terminals to adjust the transmission power, and the process ends.

The beneficial effects of the present invention are: the wireless network medium access control system and its channel parameter adjustment method of the present invention provide the specific realization of the work flow of channel information feedback and power control, so that the wireless network medium access control can be well realized.

Description of drawings

Fig. 1 is a schematic structural diagram of a wireless network media access control system of the present invention;

FIG. 2 is a schematic structural diagram of a channel information table maintained by a terminal;

3 is a flowchart of a method for adjusting channel parameters in a wireless network media access control system according to the present invention;

Fig. 4 is a flow chart of terminal processing REP-REQ message to realize information feedback;

Fig. 5 is a flow chart of terminal processing CQICH allocation IE to realize information feedback;

Fig. 6 is a flow chart of terminal processing feedback polling IE to realize information feedback;

Fig. 7 is the working flow diagram of terminal statistical calculation channel information;

Fig. 8 is a flow chart of base station adjusting downlink transmit power;

FIG. 9 is a schematic diagram of a base station controlling a terminal to adjust uplink transmit power.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, a wireless network media access control system and a channel parameter adjustment method thereof according to the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The wireless network access control system of the present invention will be described in detail below.

As shown in FIG. 1, the wireless network access control system of the present invention includes a base station 2 and a terminal 1, the terminal includes a measurement module 11 and a feedback module 12, and the base station 2 includes a request module 23, a first adjustment module 21 and a The second adjustment module 22 . in:

The measurement module 11 of the terminal is used to measure the downlink channel information and store it in the channel information table according to the area type;

The feedback module 12 of the terminal is used to calculate channel information statistics according to the feedback request of the base station 2, construct a channel information report message, and feed back downlink channel information to the corresponding base station 2;

The request module 23 of the base station is used to select a feedback mode when the base station 2 requires the terminal 1 to feed back current channel information, construct a channel information request message, and send it to the terminal 1;

The first adjustment module 21 of the base station is configured to control the physical layer to adjust the downlink transmission power according to the frame information and the downlink channel information fed back by the terminal;

The second adjustment module 22 of the base station is used to determine the power value that each terminal needs to adjust according to the uplink channel information, and save the power adjustment value and the identifier of the corresponding terminal in the uplink power adjustment list. When the base station determines that all terminals When the power adjustment value is calculated, the number of terminals that need to adjust the power is counted, and different methods are used to adjust the uplink transmit power of the corresponding terminals according to the number.

In a wireless network media access control system of the present invention, the measurement module 11 of the terminal 1 maintains a channel information table, and when the terminal 1 obtains downlink channel information from the physical layer, the channel information is classified and stored according to the area type or preamble type , terminal 1 saves a certain number of frames of channel information, when the saved channel information reaches the maximum number of frames, the old channel information will be overwritten by the new channel information;

When the base station 2 requires the terminal 1 to feed back the current channel information, the request module 23 selects a feedback method, constructs a channel information request message, and sends it to the terminal 1; the feedback module 12 of the terminal 1 processes the request information sent by the base station, and according to the The sent channel information request message, calculates the channel information statistical value, constructs the channel information report message, and sends it to the base station 2;

The first adjustment module 21 of the base station 2 determines the adjustment value of the transmission power of each terminal by the base station in the next frame according to the frame information and the downlink channel information reported by each terminal, and controls the physical layer to adjust the downlink transmission power;

The second adjustment module 22 of the base station 2 obtains uplink channel information from the physical layer, determines the power value that each terminal needs to adjust accordingly, and saves the power adjustment value and the identification of the corresponding terminal in the uplink power adjustment list. When the base station determines all When adjusting the power of the terminal, count the number of terminals that need to adjust the power, and use different methods to control the terminal to adjust the uplink transmission power according to the number.

Preferably, the terminal further includes a feedback timer 13 for realizing periodic channel information feedback. When the feedback module 12 of the terminal receives the CQICH allocation IE, it parses the information element (IE) and records the parameters of the information element (IE), and then creates according to the parameters of the information element (IE) and the feedback sign of the terminal Feedback Timer, Reset Feedback Timer, or Delete Feedback Timer. When the feedback timer 13 times out, the feedback module 12 performs statistical calculation on the channel information, constructs a feedback message, and sends it to the base station 2 . When the feedback module 12 of the terminal receives the feedback polling IE, it parses the information element (IE) and records the parameters of the information element (IE), and then according to the parameters of the information element (IE), the existing feedback timer state to create, reset, or delete a feedback timer.

The method for adjusting channel parameters of the wireless network access control system of the present invention is described in detail below, as shown in FIG. 2 , which includes the following steps:

Step S100, the terminal measures the downlink channel information and stores it in the channel information table according to the area type;

In order to support the terminal's channel information feedback, the present invention requires the terminal to maintain a channel information table for storing channel information. The structure of the channel information table defined by the terminal in the present invention is shown in FIG. 3 . The first level of the table includes the received signal strength (Received Signal Strength Indicator, RSSI) queue, the default carrier to interference ratio (Carrier to Interference and Noise Ratio, CINR) queue, CINR queue organized by area type, by area type and Channels use bitmap-organized CINR queues and CINR queues organized by preamble type. The RSSI queue maintains a series of nodes, each node includes a frame number and the RSSI value of the frame, and the RSSI queue also includes fields representing the mean value and standard deviation of the RSSI for storing statistical results. The default CINR queue maintains a series of nodes, and each node includes the frame number and the CINR value of the frame. The CINR queue also contains fields representing the CINR mean value and standard deviation, which are used to store statistical results. A CINR queue organized by region type consists of a series of nodes, each node contains a region type domain and a CINR queue. A CINR queue organized by area type and channel usage bitmap contains a series of nodes, and each node contains an area type field, a channel usage bitmap, and a CINR queue. A CINR queue organized by preamble type consists of a series of nodes, each node contains a preamble type field and a CINR queue.

Because the channel information of the current frame cannot completely reflect the channel status, the terminal needs to maintain the historical channel information, but because the premature channel information is meaningless for reflecting the current channel status and the terminal storage space is limited.

Preferably, the embodiment of the present invention adopts an information storage method for storing channel information of N frames.

The process for the terminal to maintain the channel information table is as follows:

Step S110: Obtain channel information parameters from the physical layer, including CINR, RSSI, frame number, type (area type or preamble type), and the terminal saves the information of N frames at most, and enters S120;

Step S120: Calculate the modulus of the frame number to N, assuming that the modulus n is obtained, go to S130;

Step S130: first check whether there is a node with frame number n in the RSSI queue, if found, update the content of the node with new RSSI information; if not found, create a new node, assign the frame number to n, RSSI The value is assigned as a new RSSI value, and the node is added to the RSSI queue, and enters S140;

Step S140: Query whether there is a node with frame number n in the CINR queue, if found, update the content of the node with new CINR information; if not found, create a new node, assign the frame number to n, CINR value Be the new CINR value, and add this node in the default CINR queue, enter S150;

Step S150: According to the channel information type T obtained from the physical layer, perform the following operations:

If T belongs to the leading type, then search for the node whose leading type is T in the information queue organized by leading type, if found, then add CINR in the corresponding CINR queue of this node according to the mode similar to step S140; If not found, Then create a new node, assign the type to T, and add CINR to the CINR queue corresponding to the node in a manner similar to step S140;

If T belongs to the area type and the area type is partly used sub-channel PUSC and the channel usage bitmap B is not 0, then search in the CINR queue organized by area type and channel usage bitmap The area type is T and the channel usage bitmap If the node of B is found, CINR is added to the CINR queue corresponding to the node in a manner similar to step S140; if not found, a new node is created, the area type is assigned as T, and the channel usage bitmap is assigned as B , and add the CINR to the CINR queue corresponding to the node in a manner similar to step S140;

Otherwise, search for a node whose area type is T in the CINR queue organized by area type, if found, then add CINR to the CINR queue corresponding to the node in a manner similar to step S140; if not found, create a new node, The type is assigned as T, and the CINR is added to the CINR queue corresponding to the node in a manner similar to step S140.

The following takes the RSSI queue as an example to illustrate the maintenance method of the channel information table:

First get the current frame number F and channel information RSSI;

Calculate the modulus of the frame number F to N, and obtain the modulus value of n;

Check whether there is a node with frame number n in the RSSI queue, if found, update the RSSI value of the node with the new RSSI value; if not found, create a new node, assign the frame number to n, and assign the RSSI value For the new RSSI value, then add the newly created node to the RSSI queue;

After a statistical calculation is performed on the RSSI queue, the nodes in the RSSI queue are cleared, and the calculation result is stored in the head of the RSSI queue.

The reason for clearing the nodes in the RSSI queue is: if the statistical calculation is relatively frequent, it means that the real-time requirements for channel information are relatively high, so only the channel information of the last few frames is needed; and if the statistical calculation has not been performed for a long time, pass In the above method, the terminal only maintains the latest N frames of channel information without occupying too much storage space.

The maintenance method of the CINR queue is similar to that of the RSSI.

Step S200, when the base station requires the terminal to feed back the current channel information, select a feedback method, construct a channel information request message, and send it to the terminal; the terminal calculates the channel information statistics according to the feedback request from the base station, constructs a channel information report message, and feeds back Downlink channel information to the corresponding base station;

In order to implement channel information feedback, the base station needs to select a feedback mode, construct a feedback request message, and request the terminal to feed back channel information.

The base station selects the feedback method as follows:

(1) When both the base station and the terminal support Channel Quality Indicator Channel (CQICH) fast feedback, the CQICH fast feedback method is preferred, because this method is the fastest and most efficient, so when the base station needs the terminal to feedback channel information When , the base station constructs a channel quality information channel allocation information element (CQICH allocation IE) and sends it to the terminal. Otherwise, choose according to (2).

(2) When the channel quality of the terminal is relatively stable, the report request message (ReportRequest, REP-REQ) feedback method can be used to request the channel information of the terminal on demand, which can reduce the amount of feedback information;

(3) When the channel quality of the terminal is unstable, it is necessary to monitor the channel status of the terminal in real time. At this time, a feedback request information element (feedback polling IE) can be sent to request the terminal to periodically feedback channel information.

In order to realize the information feedback, the channel information feedback request message sent by the base station should be correctly analyzed, and the channel information feedback can be effectively realized according to the feedback request message.

Further, the method for the terminal to implement channel information feedback is as follows:

When the terminal receives the REP-REQ message, it parses the message and saves the parameters in the message, then performs statistical calculations on the channel information according to the parameter requirements of the REP-REQ message, and constructs a report response message (Report Request/Response, REP-RSP), sent to the base station.

Further, the specific flow of the terminal processing the REP-REQ message for feedback in the present invention is shown in FIG. 2 .

Figure 4 is a flow chart of the terminal processing the REP-REQ message to implement information feedback, and the specific steps for the terminal to process the REP-REQ message to implement feedback are as follows:

S41: The terminal receives the REP-REQ message, and enters S42;

S42: parse the REP-REQ message, record the parameters therein, and enter S43;

S43: compare the new REP-REQ parameter with the saved REP-REQ parameter, if they are equal, go to S45; if they are not equal, go to S44;

S44: update the saved REP-REQ parameters to new REP-REQ parameters, and enter S45;

S45: Perform statistical calculation on the channel information, enter S46;

S46: After the calculation is completed, a REP-RSP message is constructed according to the calculation result and the saved REP-REQ parameters, and the downlink channel information is reported to the base station, and the processing ends.

When the terminal receives the CQICH allocation IE, it parses the information element (IE) and records the parameters of the information element (IE), and then creates a feedback timer according to the parameters of the information element (IE) and the feedback flag of the terminal. Reset the feedback timer or delete the feedback timer.

Further, the process of the terminal processing the CQICH allocation IE sent by the base station of the present invention for feedback is shown in FIG. 3 . The function of the feedback timer can realize periodic channel information feedback. When the feedback timer expires, the channel information is statistically calculated, and a feedback message is constructed and sent to the base station.

Figure 5 is a flowchart of the terminal processing CQICH allocation IE to realize information feedback. The specific steps for the terminal to use CQICH to realize feedback are as follows:

S51: The terminal receives the CQICH allocation IE, and enters S52;

S52: Parsing and recording the information of the IE, and proceeding to S53;

S53: Check the existing CQICH information list, if the number of nodes is 0, go to S54; otherwise go to S58;

S54: Whether the duration (life period, indicating the time of feedback) field in the CQICH allocation IE judged is 0, if it is 0, the processing ends; otherwise, enter S55;

S55: add the information of the IE to the CQICH information list, and enter S56;

S56: create a feedback timer, enter S57;

S57: Set the feedback flag to 1, and the processing ends;

S58: Detect whether there is a node identical to the CQICH identifier of the CQICH allocation IE in the CQICH information list, if not, go to S54; otherwise, go to S59;

S59: judge the value of the feedback flag, if it is 0, enter S510; otherwise, go to S512;

S510: judge whether the duration field in the CQICH allocation IE is 0, if not 0, enter S511; otherwise, end the processing;

S511: update the information in the CQICH list, go to S56;

S512: judge whether the duration field in the CQICH allocation IE is 0, if it is 0, enter S513; otherwise, go to S516;

S513: Delete the node whose CQICH identifier is the same as the CQICH allocation IE in the CQICH information list, and enter S514;

S514: delete the feedback timer, enter S515;

S515: Set the feedback flag to 0, and the processing ends

S516: update the information in the CQICH list, and enter S517;

S517: Reset the feedback timer, and the processing ends.

When the terminal receives the feedback polling IE, it parses the information element (IE) and records the parameters of the information element (IE), and then according to the parameters of the information element (IE) and the state of the existing feedback timer Create a feedback timer, reset a feedback timer, or delete a feedback timer.

Further, the process of the terminal processing the feedback polling IE for feedback in the present invention is shown in FIG. 4 . The function of the feedback timer can realize periodic channel information feedback. When the feedback timer expires, the channel information is statistically calculated, and a feedback message is constructed and sent to the base station.

Figure 6 is a flow chart of the terminal processing the feedback polling IE to realize information feedback. The specific steps for the terminal to realize feedback according to the feedback polling IE are as follows:

S61: The terminal receives feedback polling IE, starts parsing, and enters S62;

S62: Detect whether there is information belonging to the terminal in the IE, and if so, proceed to S63; otherwise, the process ends;

S63: Analyze and obtain the information about the terminal in the IE, and enter S64;

S64: Detect whether there is a node identical to the new IE feedback type in the saved feedback polling IE information list, and enter S65;

S65: If a node with the same type as the new IE feedback is found, go to S69; otherwise, go to S66;

S66: judging whether the duration parameter in the new IE is 0, if yes, then processing ends; otherwise, enter S67;

S67: add the new IE information node into the information list, and enter S68;

S68: Create a feedback timer and end the processing;

S69: judge whether the duration parameter in the new IE is 0, if yes, enter S610; otherwise, proceed to S613;

S610: Check whether the existing feedback timer has timed out, if yes, end the processing; otherwise, enter S611;

S611: delete the feedback timer, enter S612;

S612: Delete the found information node from the IE information list, and end the processing;

S613: update the found information node, and enter S614;

S614: Check whether the existing feedback timer has timed out, if yes, go to S615; otherwise, go to S616;

S615: Create a feedback timer, and the processing ends;

S616: Reset the feedback timer, and the processing ends.

If the adjustment function of the channel parameters is implemented in the kernel state of the linux operating system, in order to overcome the shortcoming of poor support for floating-point number calculations in the kernel state, an implementation method for statistically calculating channel information in the user state is provided in the embodiments of the present invention:

When processing a statistical calculation request, it first constructs a calculation parameter node, assigns values to the CINR parameter item and RSSI parameter item, and assigns its data identifier to the data identifier of the calculation parameter list, and adds the data identifier of the calculation parameter list to 1. Add this node to the list of calculation parameters, set the call ID to the ID of the call function that initiates the calculation request, and then construct a calculation parameter primitive and pass it to the user mode for calculation. After the user mode is calculated, it is passed to the kernel mode to analyze the calculation result, and search the calculation parameter node in the calculation parameter list according to the data identifier to find the storage location of the calculation result. calculation results. After finding the calculation parameter node, save the calculation result, and then call the corresponding processing function according to the call ID to construct a feedback message.

Further, the specific flow of channel information statistical calculation in the present invention is shown in FIG. 5 .

Fig. 7 is the working flow chart of terminal statistical calculation channel information, and specific steps are as follows:

S71: first create a calculation parameter node, and initialize it, and enter S72;

S72: Judging whether there is a CINR parameter in the calculation parameters, if so, proceed to S73; otherwise, proceed to S74;

S73: assign values to the CINR parameter list items in the calculation parameter node, and enter S74;

S74: judge whether there is an RSSI parameter in the calculation parameter, if so, enter S75; otherwise, go to S76;

S75: assign values to the RSSI parameter list items in the calculation parameter node, and enter S76;

S76: assign the data identifier in the calculation parameter list to the data identifier in the calculation parameter node, and enter S77;

S77: add 1 to the data identifier in the calculation parameter list, and enter S78;

S78: The calculation parameter node is added to the calculation parameter list, and enters S79;

S79: Set the calling flag, mark the function that calls the calculation function, and enter S710;

S710: Construct a primitive message according to the calculation parameters, data identifier and call identifier, pass it to the user state for calculation, and enter S711;

S711: After the calculation is completed, analyze the calculation result primitive, which includes the data identifier, call identifier and calculation result, and enter S712;

S712: search in the calculation parameter list according to the data identifier, and enter S713;

S713: If the node whose data identifier is equal to the resolved data identifier is found, proceed to S714; otherwise, it indicates that the calculation result is not the expected result, and the process ends;

S714: Save the calculation result, and proceed to S715 from the calculation parameter node found in the calculation parameter list;

S715: Call the corresponding processing function according to the calling identifier to feed back the channel information to the base station, and the processing ends.

In order to support the function of statistical calculation, the calculation parameter primitive format and description thereof provided by the present invention are as shown in Table 1:

Table 1 Calculation parameter primitive structure table

field describe type Message type: Calculation parameters from kernel state to user state Length The length of the message payload immediately following this field Call flag The call identifier is used to mark the function that initiates the statistical calculation request, so as to ensure that the function that needs to be called can be determined after the calculation result is returned in an asynchronous situation. Data flag Data identification, mark the calculation parameter node, so as to save the calculation result when the calculation returns Parameter Calculation parameters

The computing result primitive format and description thereof provided by the present invention are as shown in Table 2:

Table 2 Calculation result primitive structure table

field describe type Message type: calculation result from user state to kernel state Length The length of the message payload immediately following this field Call flag The call identifier is used to mark the function that initiates the statistical calculation, so as to ensure that the function that needs to be called can be determined after the calculation result is returned in an asynchronous situation. Dataflag Data identification, mark the calculation parameter node, so as to save the calculation result when the calculation returns Result Calculation results

Step S300, the base station controls the physical layer to adjust the downlink transmission power according to the frame information and the downlink channel information fed back by the terminal;

When receiving the feedback information from the terminal, the base station judges whether to adjust the transmission power to the terminal according to the channel information. If necessary, add the power adjustment value to the downlink power adjustment list. For a zone that needs zone boost, do the following:

Calculate the total zone boost (zone boost) value Z according to the frame information, and calculate the zone boost (zone boost) value of each burst according to the subchannel ratio occupied by each burst; find it from the downlink power adjustment information list The power adjustment value corresponding to each burst, and use this as each burst enhancement (PBB), and count each total burst enhancement (PBB) value P; determine whether P+Z<=3 is established, if not established , scale down the PBB of each burst and recalculate P, so that P+Z<=3 can be satisfied; judge whether the sum of each burst zone boost (zone boost) and each burst boost (PBB) If it is less than or equal to 9, set the value of each burst boost (PBB) that does not meet the condition to 9-zone boost; the final value of each burst boost (PBB) and zone boost (zone boost) is converted to Encoded value, end of processing.

Further, the process of adjusting the downlink transmission power of the base station of the present invention is shown in FIG. 6 .

Figure 8 is a flow chart of the base station adjusting the downlink transmission power. The specific steps for the base station to control the downlink transmission power are as follows:

S81: The base station obtains the downlink channel information fed back by the terminal, and proceeds to S82;

S82: Calculate the power adjustment value from the obtained channel information, and enter S83;

S83: Add the power adjustment information to the downlink power adjustment list, and enter S84;

S84: For each area that needs zone boost, calculate the total zone boost value Z according to the frame information, and calculate the zone boost value of each burst according to the sub-channel ratio of each burst, and enter S85;

S85: Find the power adjustment value corresponding to each burst from the downlink power adjustment information list, and use it as the PBB, and count the total PBB value P, and enter S86;

S86: judge whether P+Z<=3 is established, if established, go to S88; otherwise, enter S87;

S87: scale down the PBB in each area and recalculate P, so that P+Z<=3 can be satisfied, and enter S88;

S88: judge whether the sum of zone boost and PBB of each burst is less than or equal to 9, if yes, go to S810; otherwise, go to S89;

S89: set the PBB that does not satisfy the conditional burst to 9-zone boost, and enter S810;

S810: Convert the finally obtained PBB value and zone boost value into coded values, and the processing process ends.

Step S400, the base station determines the power value that each terminal needs to adjust according to the uplink channel information, and saves the power adjustment value and the identification of the corresponding terminal in the uplink power adjustment list. When the base station determines the power adjustment value of all terminals, the statistics need According to the number of terminals that adjust the power, different methods are used to adjust the transmit power of the corresponding terminals.

In order to realize that the base station controls each terminal to adjust the uplink transmission power, the physical layer of the base station measures the uplink channel quality of each terminal, judges whether the terminal needs to adjust the power, and if so, adds the power adjustment information to the uplink power adjustment list. Then the base station counts the number of terminals that need to adjust the power. If it is 0, it means that no terminal needs to adjust the power, and the process ends; if it is 1, it means that there is only one terminal that needs to adjust the transmission power. Change response, PMC-RSP) controls a single terminal to adjust the transmission power, and the processing ends; if it is greater than 1, it means that there are multiple terminals that need to adjust the transmission power, and use the fast power control management message (Fast Power Control, FPC) to control multiple terminals to adjust the transmission power, end of processing.

Further, the flow of the base station controlling the terminal to adjust the uplink transmission power of the present invention is shown in FIG. 7 .

FIG. 9 is a schematic diagram of a base station controlling a terminal to adjust uplink transmission power. The specific steps for the base station to control the uplink transmission power of a terminal are as follows:

S91: The physical layer of the base station measures the uplink channel quality of each terminal, and proceeds to S92;

S92: Select the channel quality of a terminal, enter S93;

S93: Determine the power adjustment value according to the signal quality, and enter S94;

S94: judge whether the terminal needs to adjust the power, if yes, go to S95; otherwise, go to S96;

S95: Add the power adjustment information to the uplink power adjustment list, and enter S96;

S96: Determine whether the channel information of all terminals has been detected, if yes, go to S98; otherwise, go to S97;

S97: Get the channel information of the next terminal, go to S93;

S98: Count the number N of terminals that need power adjustment, and enter S99;

S99: if N is 0, go to S910; otherwise, go to S911;

S910: no terminal needs to adjust the power, and the processing ends;

S911: if N is 1, go to S912; otherwise, go to S913;

S912: Use the PMC-RSP message to control a single terminal to adjust the transmission power, and the processing ends;

S913: Use the FPC message to control multiple terminals to adjust the transmission power, and the process ends.

The wireless network medium access control system and the channel parameter adjustment method of the present invention provide the working flow of channel information feedback and the specific realization of power control, so that the wireless network medium access control can be well realized.

Other aspects and features of the present invention will be apparent to those skilled in the art by describing specific embodiments of the present invention in conjunction with the accompanying drawings.

The specific embodiments of the present invention have been described and illustrated above, and these embodiments should be considered as exemplary only, and are not used to limit the present invention, and the present invention should be interpreted according to the appended claims.

Claims (15)

1. A wireless network access control system, comprising a base station and a terminal, wherein the terminal comprises a measurement module and a feedback module, and the base station comprises a request module, a first adjustment module and a second adjustment module, wherein: The measurement module of the terminal is used to measure the downlink channel information and store it in the channel information table according to the area type; The feedback module of the terminal is used to calculate channel information statistics according to the feedback request of the base station, construct a channel information report message, and feed back downlink channel information to the corresponding base station; The request module of the base station is used to select a feedback mode when the base station requires the terminal to feed back current channel information, construct a channel information request message, and send it to the terminal; The first adjustment module of the base station is configured to control the physical layer to adjust the downlink transmission power according to the frame information and the downlink channel information fed back by the terminal; The second adjustment module of the base station is used to determine the power value that each terminal needs to adjust according to the uplink channel information, and save the power adjustment value and the identification of the corresponding terminal in the uplink power adjustment list. When the base station determines the power value of all terminals When calculating the power adjustment value, count the number of terminals that need to adjust the power, and use different methods to adjust the uplink transmit power of the corresponding terminal according to the number. 2. The wireless network access control system according to claim 1, wherein the first level of the channel information table includes RSSI queues, default CINR queues, CINR queues organized according to area types, And channels use bitmap-organized CINR queues and CINR queues organized by preamble type. 3. The wireless network access control system according to claim 2, characterized in that the RSSI queue maintains a series of nodes, each node includes a frame number and the RSSI value of the frame, and the RSSI queue also contains RSSI Domains of mean and standard deviation for storing statistical results; The default CINR queue maintains a series of nodes, each node includes a frame number and the CINR value of the frame, and the default CINR queue includes fields representing the CINR mean value and standard deviation at the same time, for storing statistical results; The CINR queue organized according to the area type includes a series of nodes, each node includes an area type domain and a CINR queue, and the CINR queue organized according to the area type is the same as the default CINR queue; The CINR queue organized according to the area type and the channel usage bitmap comprises a series of nodes, each node includes an area type field, a channel usage bitmap and a CINR queue, the CINR queue organized according to the area type and the channel usage bitmap and The default CINR queues are the same; The CINR queue organized according to the preamble type includes a series of nodes, each node includes a preamble type field and a CINR queue, and the CINR queue organized according to the preamble type is the same as the default CINR queue. 4. The wireless network access control system according to claim 2, wherein the feedback mode is CQICH fast feedback mode, REP-REQ feedback mode and feedback polling IE message request feedback mode. 5. The wireless network access control system according to claim 4, wherein the terminal further includes a feedback timer for realizing periodic channel information feedback; When the feedback module of the terminal receives the CQICH allocation IE, it parses the information unit and records the parameters of the information unit, and then creates a feedback timer, resets the feedback timer or Delete the feedback timer; when the feedback timer expires, the feedback module performs statistical calculations on the channel information, constructs a feedback message, and sends it to the base station; When the terminal receives the feedback polling IE, it parses the information unit and records the parameters of the information unit and the state of the existing feedback timer to create a feedback timer, reset the feedback timer or delete the feedback timer; feedback timing When the device times out, the feedback module performs statistical calculation on the channel information, constructs a feedback message, and sends it to the base station. 6. The wireless network access control system according to claim 1, characterized in that, according to the difference in the number, different methods are used to adjust the transmit power of the corresponding terminal, which is: If it is 0, it means that no terminal needs to adjust the power, and the processing ends; If it is 1, it means that only one terminal needs to adjust the transmission power, use the PMC-RSP message to control a single terminal to adjust the transmission power, and the process ends; If it is greater than 1, it means that there are multiple terminals that need to adjust the transmission power, use the FPC message to control multiple terminals to adjust the transmission power, and the process ends. 7. A method for adjusting channel parameters of a wireless network access control system, comprising the following steps: Step A, the terminal measures the downlink channel information and stores it in the channel information table according to the area type; Step B, when the base station requires the terminal to feed back the current channel information, select a feedback method, construct a channel information request message, and send it to the terminal; the terminal calculates the channel information statistics according to the feedback request from the base station, constructs a channel information report message, and feeds back Downlink channel information to the corresponding base station; Step C, the base station controls the physical layer to adjust the downlink transmission power according to the frame information and the downlink channel information fed back by the terminal; Step D, the base station determines the power value that each terminal needs to adjust according to the uplink channel information, and saves the power adjustment value and the identification of the corresponding terminal in the uplink power adjustment list. When the base station determines the power adjustment value of all terminals, the statistics need According to the number of terminals that adjust the power, different methods are used to adjust the transmit power of the corresponding terminals. 8. The method for adjusting channel parameters of a wireless network access control system according to claim 7, wherein in said step A, said terminal stores downlink channel information in a channel information table, comprising the following steps: Step A1, obtain channel information parameters from the physical layer, including CINR, RSSI, frame number, type, and the terminal saves the information of N frames at most, and enters step A2; Step A2, calculate the modulus of the frame number to N, assuming that the modulus value n is obtained, enter step A3; Step A3, first query whether there is a node whose frame number is n in the RSSI queue, if found, update the content of the node with new RSSI information; If not found, create a new node, assign the frame number to n, assign the RSSI value to a new RSSI value, and add the node to the RSSI queue; Go to step A4; Step A4, query whether there is a node whose frame number is n in the CINR queue, if found, update the content of the node with the new CINR information; If not found, create a new node, assign the frame number to n, CINR value is the new CINR value, and add the node to the default CINR queue; Go to step A5; Step A5, according to the channel information type T obtained from the physical layer, perform the following operations: If T belongs to the leader type, search for a node whose leader type is T in the information queue organized by leader type, if found, add CINR to the CINR queue corresponding to the node in the same way as step A4; if not found, Then create a new node, assign the type to T, and add CINR to the CINR queue corresponding to the node in the same way as step A4; If T belongs to the area type and the area type is a partially used subchannel and the channel usage bitmap B is not 0, then the lookup is performed in the CINR queue organized by area type and channel usage bitmap The area type is T and the channel usage bitmap is If the node of B is found, add CINR to the CINR queue corresponding to the node in the same way as step A4; if not found, create a new node, assign the area type to T, and assign the channel usage bitmap to B, And add the CINR to the CINR queue corresponding to the node in the same way as step A4; Otherwise, look for a node whose area type is T in the CINR queue organized by area type, if found, add CINR to the CINR queue corresponding to the node in the same way as step A4; if not found, create a new node, The type is assigned as T, and the CINR is added to the CINR queue corresponding to the node in the same manner as step A4. 9. The method for adjusting channel parameters of a wireless network access control system according to claim 7, wherein in said step B, said base station selects a feedback mode, comprising the following steps: When both the base station and the terminal support channel quality information channel CQICH fast feedback, select the CQICH fast feedback mode; When the channel quality of the terminal is relatively stable, use the REP-REQ message feedback method to request the channel information of the terminal as needed; When the channel quality of the terminal is unstable, it is necessary to monitor the channel status of the terminal in real time. At this time, a feedback polling IE message is sent to request the terminal to periodically feedback channel information. 10. The method for adjusting channel parameters of a wireless network access control system according to claim 9, characterized in that, in the step B, the terminal uses the report response management message REP-RSP to implement feedback, including the following steps: Step B11, the terminal receives the report request management message REP-REQ, and enters step B12; Step B12, analyze the REP-REQ message, record the parameters therein, and enter step B13; Step B13, comparing the new REP-REQ parameter with the saved REP-REQ parameter, if they are equal, go to step B15; if they are not equal, go to step B14; Step B14, update the saved REP-REQ parameters to new REP-REQ parameters, and enter step B15; Step B15, perform statistical calculation on channel information, and enter step B16; Step B16, after the calculation is completed, a REP-RSP message is constructed according to the calculation result and the saved REP-REQ parameters, and the downlink channel information is reported to the base station, and the processing ends. 11. The method for adjusting channel parameters of a wireless network access control system according to claim 9, characterized in that, in the step B, the terminal implements feedback using the channel quality information channel CQICH, comprising the following steps: Step B11', the terminal receives the channel quality information channel allocation information unit CQICH allocationIE, and enters step B12'; Step B12', analyze and record the information of the information unit, and enter step B13'; Step B13', check the existing CQICH information list, if the number of nodes is 0, go to step B14'; otherwise go to step B18'; Step B14', judge whether the lifetime duration field in the CQICH allocation IE is 0, if it is 0, the processing ends; otherwise, enter step B15'; Step B15', add the information of the information unit into the CQICH information list, and enter step B16'; Step B16', create a feedback timer, enter step B17'; Step B17', the feedback flag is set to 1, and the processing ends; Step B18', check whether there is a node identical to the CQICH identifier of the CQICH allocation IE in the CQICH information list, if not, go to step B14'; otherwise, go to step B19'; Step B19', judge the value of the feedback flag, if it is 0, enter step B110'; otherwise, go to step B112'; Step B110', judge whether the duration field in the CQICH allocation IE is 0, if not 0, enter step B111'; otherwise, end the process; Step B111', update the information in the CQICH list, go to step B16'; Step B112', judge whether the duration field in the CQICH allocation IE is 0, if it is 0, enter step B113'; otherwise, go to step B116'; Step B113', delete the node whose CQICH identifier is the same as the CQICH allocation IE in the CQICH information list, and enter step B114'; Step B114', delete the feedback timer, enter step B115'; Step B115', set the feedback flag to 0, and end the processing; Step B116', update the CQICH information list, enter step B117'; Step B117', reset the feedback timer, and the process ends. 12. The method for adjusting channel parameters of a wireless network access control system according to claim 9, wherein in said step B, the terminal realizes feedback according to the feedback polling IE message of the feedback request information unit, comprising the following steps: Step B11″, the terminal receives the feedback polling IE message, starts parsing, and enters step B12″; Step B12″, detect whether there is information belonging to the terminal in the information unit IE, if yes, enter step B13″; otherwise, the process ends; Step B13″, analyze and obtain information about the terminal in the IE, and enter step B14″; Step B14 ″, detect whether there is a node identical to the new IE feedback type in the saved feedback polling IE information list, and enter step B15 ″; Step B15 ", if finding the same node as the new IE feedback type, go to step B19 "; otherwise, go to step B16 "; Step B16 "judging whether the lifetime duration parameter in the new IE is 0, if yes, the process ends; otherwise, enter step B17"; Step B17 ", add new IE information node in the information list, enter step B18 "; Step B18 ", create a feedback timer, end processing; Step B19″, judge whether the duration parameter in the new IE is 0, if yes, enter step B110″; otherwise, go to step B113″; Step B110″, check whether the existing feedback timer has expired, if yes, end the process; otherwise, enter step B111″; Step B111 ", delete the feedback timer, enter step B112 "; Step B112 ", delete the found information node from the IE information list, and end the process; Step B113 ", update the found information node, enter step B114 "; Step B114″, check whether the existing feedback timer has expired, if yes, enter step B115″; otherwise, go to step B116″; Step B115", create a feedback timer, and the process ends; Step B116", reset the feedback timer, and the process ends. 13. The method for adjusting channel parameters of a wireless network access control system according to claim 9, wherein in said step B, if the adjustment of channel parameters is implemented in the kernel state of the Linux operating system and the statistical calculation function is implemented, the terminal Perform channel information statistical calculation, including the following steps: Step B21, first create a calculation parameter node, and initialize it, then go to step B22; Step B22, judging whether there is a CINR parameter in the calculation parameters, if so, go to B24; otherwise go to B25; Step B23, assign a value to the CINR parameter list item in the calculation parameter node, and enter step B24; Step B24, judge whether there are RSSI parameters in the calculation parameters, if so, go to step B25; otherwise go to step B26; Step B25, assign a value to the RSSI parameter list item in the calculation parameter node, and enter step B26; Step B26, assign the data identifier in the calculation parameter list to the data identifier in the calculation parameter node, and enter step B27; Step B27, add 1 to the data identifier in the calculation parameter list, and enter step B28; Step B28, the calculation parameter node is added to the calculation parameter list, and enters step B29; Step B29, set the call flag, mark the calculation function called by the function, and enter step B210; Step B210, construct a primitive message according to the calculation parameters, data identifier and call identifier, and pass it to the user state for calculation, and enter step B211; Step B211, after the calculation is completed, analyze the calculation result primitive, which includes data identification, call identification and calculation results, and enter step B212; Step B212, search in the calculation parameter list according to the data identifier, and enter step B213; Step B213, if the node whose data identifier is equal to the resolved data identifier is found, go to step B214; otherwise, it indicates that the calculation result is not the expected result, and the process ends; Step B214, save the calculation result, and proceed to step B215 from the calculation parameter node found in the calculation parameter list; Step B215, call the corresponding processing function to feed back the channel information to the base station according to the calling identifier, and the processing ends. 14. The method for adjusting channel parameters of a wireless network access control system according to claim 7, characterized in that, in the step C, the base station controls the downlink transmission power, comprising the following steps: In step C1, the base station obtains the downlink channel information fed back by the terminal, and proceeds to step C2; Step C2, calculating the power adjustment value from the obtained channel information, and proceeding to step C3; Step C3, adding the power adjustment information to the downlink power adjustment list, and entering step C4; Step C4, for each area that needs to be enhanced with zone boost, calculate the total zone boost value Z according to the frame information, and calculate the zone boost value of each burst according to the sub-channel ratio of each burst, and enter the step C5; Step C5, look up the power adjustment value corresponding to each burst from the downlink power adjustment information list, and use it as the enhanced value PBB of each burst, and count the total PBB value P, and enter step C6; Step C6, judging whether P+Z<=3 is true, if true, go to step C8; otherwise, go to step C7; Step C7, scale down the PBB in each area and recalculate P, so that P+Z<=3 can be satisfied, and enter step C8; Step C8, judging whether the sum of zone boost and PBB of each burst is less than or equal to 9, if yes, go to step C10; otherwise, go to step C9; Step C9, setting the PBB that does not meet the conditional burst as 9-zone boost, and entering step C10; Step C10, convert the finally obtained PBB value and zone boost value into coded values, and end the return. 15. The method for adjusting channel parameters of a wireless network access control system according to claim 7, wherein in said step D, the base station controls the uplink transmission power of the terminal, comprising the following steps: In step D1, the physical layer of the base station measures and obtains the uplink channel information CINR and RSSI of each terminal, and proceeds to step D2; Step D2, select channel information of a terminal, and enter step D3; Step D3, determine the power adjustment value according to the signal quality, and enter step D4; Step D4, judging whether the terminal needs to adjust the power, if yes, go to step D5; otherwise, turn to step D6; Step D5, adding the power adjustment information to the uplink power adjustment list, and entering step D6; Step D6, judging whether the channel information of all terminals has been detected, if yes, go to step D8; otherwise, go to step D7; Step D7, get the channel information of the next terminal, go to step D3; Step D8, counting the number N of terminals that need to adjust power, and proceeding to step D9; Step D9, if N is 0, go to step D10; otherwise, go to step D11; Step D10, no terminal needs to adjust the power, and the process ends; Step D11, if N is 1, go to step D12; otherwise, go to step D13; Step D12, use the PMC-RSP message to control a single terminal to adjust the transmission power, and the processing ends; Step D13, use the FPC message to control multiple terminals to adjust the transmission power, and the process ends.

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