CN101179421B - A method, device and system for differentiating quality of service mapping tables - Google Patents

Abstract

The invention discloses a method, device and system for distinguishing the quality of service mapping table, so that the terminal equipment can correctly update the quality of service mapping table when the quality of service mapping table on the network side is changed; the method of the invention includes: the network side sends A message of a quality mapping table and its identification information; when the message is a response message sent by the network side after receiving a message requesting a quality of service mapping table, the terminal device receiving the response message locally saves the quality of service mapping table and Its identification information; when the message is an update message sent by the network side, the terminal device that receives the update message determines that the identification information in the message is consistent with the local identification information, and uses the quality of service mapping table in the update message The local QoS mapping table is updated; in addition, the terminal device updates the local QoS mapping table according to the updated QoS mapping table sent by the network side through unicast.

Description

A method, device and system for differentiating quality of service mapping tables

technical field

The invention relates to the communication field, in particular to a method, device and system for distinguishing service quality mapping tables.

Background technique

The extended service set (ESS, Extension Service Set) of the 802.11 network shown in Fig. Group synchronous terminals/stations (STA, STATION), the STA is a processing device with an 802.11 wireless network interface, mainly referring to a user terminal of the 802.11 network, such as a laptop computer or a laptop computer; the STA passes An access point (AP, Access Point) is connected to a DS; the DS is not included in the ESS.

In the IEEE 802.11u standard document "P802.11u-D0.01", it is mentioned that QoS (Quality of Service) mapping is required when WLAN communicates with external networks. However, different external networks have different QoS representation methods , but in all IP data packets, the end-to-end priority is identified by the Different Service Code Point (DSCP, Different Service Code Point) in the IP header, so if you want to reserve this priority on the air interface of IEEE 802.11, you must The DSCP needs to be correctly mapped to the IEEE 802.11e access category (AC, Access Category). The following describes the method of QoS mapping and the method of transmitting the QoS mapping table.

IEEE 802.11e defines the QoS mechanism, that is, the mapping method from user priority (UP, User Priority) to access category (AC, Access Category). The mechanism of Enhanced Distribution Coordinate Access (EDCA, Enhanced Distribution Coordinate Access) is defined in IEEE 802.11e, and the following functions are provided in this mechanism: Terminal/site supporting quality of service (QSTA, Quality of Service (QoS) Station ) can use 8 different UPs to access the channel. The specific method is: define four types of access ACs to support STAs to distribute service flows with different UPs. Different ACs correspond to different sending opportunities (duration of channel occupation), contention window, and backoff time, and different ACs correspond to different queues. When the STA sends data to the AP, the data with different UP identifiers will be put into the corresponding AC queue for sending, and the same is true for the AP sending data to the STA, so the QoS of IEEE 802.11 is realized. Table 1 shows the mapping table from UP to AC.

Table 1

The above table mainly reflects the mapping from the UP column to the AC column, and the priority from top to bottom is increasing. The 8 UP values correspond to the four types of services defined in the AC: AC_BK, AC_BE, AC_VI, and AC_VO, and the services of these four ACs are the corresponding Background, Best Effort, Video, and Voice.

The following describes the mapping method from DSCP to UP. In the existing proposal, the QoS Map Set element is used to represent the mapping relationship. The specific form of the QoS mapping table is shown in Table 2.

Serial number Order Size Size(octets) Description Description 1 1 Element ID 2 1 length 3 2 DSCP exception element #1 (optional) 4 2 DSCP exception element #2 (optional) 4+n-2 2 DSCP exception element #n (optional) 5+n-2 2 UP 0 DSCP range element 6+n-2 2 UP 1 DSCP range element 7+n-2 2 UP 2 DSCP range elements 8+n-2 2 UP 3 DSCP range elements

9+n-2 2 UP 4 DSCP range elements 10+n-2 2 UP 5 DSCP range elements 11+n-2 2 UP 6 DSCP range elements 12+n-2 2 UP 7 DSCP range elements

Table 2

In the QoS mapping table, the element identifier Element ID is the identification value of the QoS mapping table element; the length Length is the number of bytes in the QoS Map Set except for the Element ID field and the Length field; the differentiated service code point exception element DSCP exception element is optional There are at most 8; QoS MapSet finally has 8 differentiated service code point range elements DSCP Range element corresponding to 8 UP values; for example, the value of UP corresponding to DSCP Range element whose sequence number is 5+n-2 is equal to 0 , and others similar.

The following describes the formats of the DSCP exception element field and the DSCP Range element field in detail. In the specific format diagram of the DSCP exception element field shown in Figure 2, DSCPValue is the value of DSCP, and User Priority is the corresponding UP value; in the specific format diagram of the DSCP Rangeelement field shown in Figure 3, DSCP Low Value is DSCP The little endian value of DSCPHigh Value is the big endian value of DSCP, and the DSCP value between the little endian value and the big endian value corresponds to a corresponding UP value (see Table 1 for the specific UP value). After the above mapping, each DSCP value corresponds to a UP value, so a QoS mapping table is also a QoS mapping table from DSCP to UP.

As shown in Figure 4, this figure is a schematic diagram of primitives for interaction between a terminal and an access point, where the media access control (MAC, Media Access Control) layer and the terminal management entity (SME, Station ManagementEntity) are implemented through primitives Communication (there is a MAC layer management entity MLME (MAC sublayer management entity) interface between the MAC layer and the SME), the MAC layer of the STA and the MAC layer of the AP communicate through frames; the interaction process is as follows:

1. The SME of the STA generates a request primitive and sends the request primitive to the MAC layer of the STA.

2. The MAC layer of the STA generates a corresponding request frame according to the received request primitive, and sends the request frame to the MAC layer of the AP.

3. The MAC layer of the AP generates a corresponding indication primitive according to the received request frame, and sends the indication primitive to the SME of the AP.

4. The SME of the AP generates a corresponding response primitive according to the received indication primitive, and sends the response primitive to the MAC layer of the AP.

5. The MAC layer of the AP generates a corresponding response frame according to the received response primitive, and sends the response frame to the MAC layer of the STA.

6. The MAC layer of the STA generates a corresponding confirm primitive according to the received response frame, and sends the confirm primitive to the SME of the STA. The STA's SME performs corresponding actions after receiving the confirm primitive.

In the schematic diagrams of the general frame structure of the 802.11 protocol shown in Figure 5A and Figure 5B, the general frame of the 802.11 protocol is mainly composed of media access control header information (MAC Header), frame body information (Frame Body) and frame check sequence (FCS, Frame Check Sequence) consists of three parts, among which, MAC Header mainly identifies the frame type, address, segmentation information and service quality control (QoS Control) and other information; Frame Body is frame body information, if the frame is a data frame, then Frame Body is data information; if the frame is a management frame, Frame Body is some information that needs to be managed; FCS is the check information of the entire frame.

Figure 6 is a schematic diagram of the management frame structure of the 802.11 protocol. The management frame of the 802.11 protocol is also composed of MAC Header, Frame Body and FCS. Among them, DA in the MAC Header represents the destination address of the frame, SA represents the source address of the frame, and BSSID is The MAC address of an AP that manages the BSS; the Frame Body contains the specific management information of the management frame. The Action frame belongs to the management frame, and its frame body is mainly composed of the Action field. The Action field is mainly composed of the Category field and the Action Details field, as shown in Figure 7; the Category field identifies the category of the Action frame, and a given Category Name The Action frame is called <Category Name>Action frame, for example, the Action frame of the QoS category is called a QoS Action frame, and the value of the Category field is 1 at this time; Action Details is some specific information of the Action frame, which varies according to the type of the Action frame different.

The following describes the transmission method of the QoS mapping table. As shown in Figure 8, this process assumes that the information of the back-end network is pre-configured in the AP, such as the correspondence between VLAN and DSCP mapping. The implementation process is as follows:

In step 800, the STA completes the association/re-association (Association) with the AP.

In step 801, the STA and the AP complete the EAP authentication, that is, the STA receives the EAP-Success message.

Step 802, the AP associates the STA with the virtual local area network/tunnel VLAN/Tunnel, and the AP can correctly associate the STA with the corresponding QoS Map Set according to this information.

In step 803, the STA obtains the transmission key of the air interface, that is, completes the four-way handshake.

Step 804, the STA requests the QoS mapping table from the AP through the QoS Map Request frame.

Step 805, the AP selects the QoS mapping table corresponding to the STA, and puts the QoS mapping table in the QoS Map Configure frame and sends it to the STA.

Step 806, the STA saves the QoS mapping table in the received QoS Map Configure frame.

Step 807, when the QoS mapping table in the AP is updated, the AP sends the QoS Map Configure frame containing the updated QoS mapping table to the STA through multicast/broadcasting.

In step 808, the STA updates the local QoS mapping table after receiving the QoS Map Configure frame.

The QoS Map Request frame and QoS Map Configure frame in the above process are both Action frames, and the frame body format of the QoS Map Request frame is shown in Table 3:

Serial number Order Information 0 Category Category 1 Action 2 Dialog Token

table 3

The frame body format of the QoS Map Configure frame is shown in Table 4:

Serial number Order Information 0 Category Category 1 Action 2 Dialog Token 3 QoS Map Set

Table 4

The meaning of the Category field in Table 3 and Table 4 is the same as the Category field in Figure 7, and their values are all 1 (representing a QoS Action frame), and the Action field represents different QoS Action frames, and their values are 4 respectively and 5; the Dialog Token field is used to match the response and request of the Action frame; see Table 2 above for the specific form of the QoS mapping table in Table 4.

When the STA requests the QoS mapping table from the AP, as shown in Figure 9, the transmission process of the QoS Map Request frame and the QoS MapConfigure frame between the STA and the AP is as follows:

1. The SME of the STA generates a MLME-QoSMap.request primitive, and sends the primitive to the MAC layer of the STA.

2. The MAC layer of the STA generates a corresponding QoS Map Request frame according to the received MLME-QoSMap.request primitive, and sends the frame to the MAC layer of the AP.

3. The MAC layer of the AP generates the MLME-QoSMap.indication primitive according to the received QoS Map Request frame, and sends the primitive to the SME of the AP.

4. The SME of the AP generates the corresponding MLME-QoSMap.response primitive according to the received MLME-QoSMap.indication primitive, and sends the primitive to the MAC layer of the AP.

5. The MAC layer of the AP generates the corresponding QoS Map Configure frame according to the received MLME-QoSMap.response primitive, and sends the frame to the MAC layer of the STA.

6. The MAC layer of the STA generates the MLME-QoSMap.confirm primitive according to the received QoS Map Configure frame, and sends the primitive to the SME of the STA. The STA's SME performs corresponding actions according to the received primitive.

When the QoS Map Set in the AP is updated, the transmission process of the QoS Map Configure frame between the STA and the AP is similar to the above process, only steps 1 to 3 are omitted (at this time, the SME of the AP will not receive the MLME -QoSMap.indication primitive), the other implementation steps are the same, and will not be repeated here.

To sum up, in the prior art, the access point AP has multiple QoS mapping tables, so the QoS mapping tables delivered to the terminal are also different, so when the AP delivers the updated QoS mapping table, the STA cannot distinguish between Is the QoS mapping table in the QoS Map Configure frame its own corresponding QoS mapping table? If the QoS mapping table issued by the AP is not the QoS mapping table corresponding to the STA, the STA will get the wrong QoS mapping table, which will cause the STA to malfunction. Updating the QoS mapping table further affects the service quality of the STA.

Contents of the invention

The invention provides a method for distinguishing the quality of service mapping table, so that the terminal equipment can correctly update the service quality mapping table when the service quality mapping table on the network side is changed.

The present invention provides following technical scheme:

A method for differentiating quality of service mapping tables, comprising the steps of:

The network side sends a message including the quality of service mapping table and its identification information;

When the message is a response message sent by the network side after receiving a message requesting a QoS mapping table, the terminal device receiving the response message locally saves the QoS mapping table and its identification information;

When the message is an update message sent by the network side, after receiving the update message, the terminal device determines that the identification information in the message is consistent with the local identification information, and uses the service quality mapping table in the update message to update the local quality of service mapping table.

A method for updating a quality of service mapping table, comprising the steps of:

The network side sends an update message including the updated QoS mapping table through unicast;

The terminal device that receives the update message updates the local quality of service mapping table according to the service quality mapping table in the update message.

A network device comprising:

a receiving unit, configured to receive messages sent by other communication devices;

A selection unit, configured to select the quality of service mapping table and its identification information corresponding to other communication devices according to the request message or actively;

A sending unit, configured to send a message including the QoS mapping table and its identification information.

A terminal device comprising:

a receiving unit, configured to receive a message including a quality of service mapping table and its identification information;

a storage unit, configured to store the quality of service mapping table and its identification information;

A comparing unit, configured to compare the identification information of the quality of service mapping table in the received message with the identification information of the saved quality of service mapping table;

An updating unit, configured to update the quality of service mapping table in the storage unit according to the quality of service mapping table in the message when the identification information in the received message is consistent with the saved identification information.

A communication system comprising:

The network device is configured to send a message including the quality of service mapping table and its identification information to the terminal device;

The terminal device is configured to receive a response message after requesting the message of the quality of service mapping table from the network device, and store locally the quality of service mapping table and its identification information carried in the response message; or to receive an update message, and determine the After the identification information in the message is consistent with the local identification information, the local quality of service mapping table is updated by using the service quality mapping table in the update message.

The beneficial effects of the present invention are as follows:

In the present invention, when the quality of service mapping table on the network side is updated, the terminal device can correctly determine whether to update the locally stored quality of service mapping table; when the terminal device requests the quality of service mapping table from the network side for the first time, the network side will include the corresponding quality of service mapping table The response message of the mapping table and its identification information is sent to the terminal device, and the terminal device locally saves the service quality mapping table and its identification information; when the service quality mapping table on the network side changes, it will include the updated service An update message of the quality mapping table and its identification information is sent to the terminal device, and the terminal device receiving the update message compares the identification information in the message with the identification information of the locally saved quality of service mapping table, and When consistent, update the locally saved QoS mapping table according to the QoS mapping table in the update message; in addition, in the present invention, when the QoS mapping table on the network side is updated, the network side sends the updated QoS mapping table through unicast mode. The mapping table can also realize that the terminal equipment correctly updates the locally stored quality of service mapping table; the use of the present invention effectively avoids the problem that the quality of service cannot be processed normally due to the terminal equipment incorrectly updating the locally stored quality of service mapping table, thereby making the terminal Equipment can work more efficiently.

Description of drawings

FIG. 1 is a schematic diagram of an extended service set of an 802.11 network in the prior art;

Fig. 2 is a schematic diagram of the format of the DSCP exception element field in the prior art;

Fig. 3 is a schematic diagram of the format of the DSCP range element field in the prior art;

FIG. 4 is a primitive diagram of interaction between a terminal and an access point in the 802.11 protocol in the prior art;

5A and 5B are schematic diagrams of the general frame structure of the 802.11 protocol in the prior art;

FIG. 6 is a schematic diagram of a management frame structure of the 802.11 protocol in the prior art;

Fig. 7 is a schematic diagram of the format of the Action field in the Action frame body in the prior art;

FIG. 8 is a flow chart of transmitting a QoS mapping table between a STA and an AP in the prior art;

Fig. 9 is a primitive diagram of transmission of QoS Map Request frame and QoS Map Configure frame between STA and AP in the prior art;

FIG. 10 is a schematic structural diagram of a communication system in an embodiment of the present invention;

Fig. 11 is the implementation flowchart of updating the local QoS mapping table by the STA through the QoS mapping table identification when adding the QoS mapping table identification in the QoS Map Configure frame in Embodiment 1 of the present invention;

FIG. 12 is an implementation flowchart of updating the local QoS mapping table by the STA through the QoS mapping table identifier when adding the QoS mapping table identifier in the QoS mapping table in Embodiment 1 of the present invention;

FIG. 13 is a flow chart of the STA updating the local QoS mapping table through the multicast address when adding a multicast address field or a multicast address cell in the QoS Map Configure frame in Embodiment 2 of the present invention;

FIG. 14 is a schematic diagram of the format of a multicast address cell in Embodiment 2 of the present invention;

FIG. 15 is an implementation of updating the local QoS mapping table by the STA through the multicast address when the multicast address field is added to the QoS mapping table in Embodiment 2 of the present invention;

Fig. 16 is a schematic structural diagram of a communication system in an embodiment of the present invention.

Detailed ways

In the embodiment of the present invention, the terminal device determines whether to update the locally saved QoS mapping table to the updated QoS mapping table issued by the network side through the identification information of the quality of service QoS mapping table. When receiving the QoS mapping table identification information in the update message Update the local QoS mapping table when it is consistent with the identification information of the locally saved quality of service mapping table; in addition, in the embodiment of the present invention, the network side sends an update message containing the updated QoS mapping table to the terminal device through unicast, and the terminal The device updates the locally stored QoS mapping table according to the QoS mapping table in the update message.

A schematic structural diagram of a communication system in this embodiment is shown in FIG. 10. The system includes a terminal device (STA) 100 and an access device (AP) 101; the access device 101 is used to send an A message of a mapping table and its identification information; the terminal device 100 is configured to process the QoS mapping table according to the received identification information in the message.

When the terminal device 100 requests the QoS mapping table to the access device 101, the access device 101 sends a response message to the terminal device 100 through a quality of service configuration QoS Map Configure frame, and the QoS MapConfigure frame includes a QoS mapping table and its identification information; The terminal device 100 of the response message locally saves the QoS mapping table and its identification information in the QoS Map Configure frame.

The access device 101 sends an update message to the terminal device 100 through a QoS Map Configure frame, the QoS Map Configure frame includes an updated QoS mapping table and its identification information, and the terminal device 100 combines the identification information in the response message with the locally stored identification The information is compared, and when the two are consistent, the local QoS mapping table is updated according to the QoS mapping table in the QoS Map Configure frame.

As shown in FIG. 10 , the access device 101 includes: a receiving unit 1010 for receiving a message sent by the terminal device 100, the message including a request message for requesting a QoS mapping table sent by the terminal device 100; a selection unit 1011 for actively selecting Or select the QoS mapping table and its identification information corresponding to the terminal device 100 according to the request message sent by the terminal device 100; the sending unit 1012 is configured to send a response message containing the QoS mapping table and its identification information to the terminal device 100 according to the request message , and send an update message including the updated QoS mapping table and its identification information to the terminal device 100 when the QoS mapping table is updated.

The terminal device 100 includes: a sending unit 1000 for sending a request message requesting a QoS mapping table to the access device 101; a receiving unit 1001 for receiving a message containing the QoS mapping table and its identification information sent by the access device 101, and Obtain the corresponding QoS mapping table and its identification information according to the received message, the message includes the response message and update message sent by the access device 101; the storage unit 1002 is used to locally store the QoS mapping table obtained from the response message and its identification information; the comparing unit 1003 is used for comparing the identification information of the QoS mapping table in the received update message with the identification information of the locally saved QoS mapping table; the updating unit 1004 is used for When the identification information is consistent with the saved identification information, update the QoS mapping table in the storage unit 1002 according to the QoS mapping table in the update message. If there is no QoS mapping table locally in the terminal device 100, the received QoS Map Configure frame containing the QoS mapping table is directly discarded; the STA described here does not have a QoS mapping table, which means that the STA does not request the QoS mapping table or requests QoS mapping table but no response message was received.

Embodiment one:

In this embodiment, the STA determines whether to update the locally saved QoS mapping table to the updated QoS mapping table issued by the AP through the QoS mapping table identification; the QoS mapping table identification can adopt various forms, such as simple and non-repetitive numbers, domain names , Subscription Service Provider Network (SSPN, Subscription Service Provider Network) logo, etc.

In this embodiment, the addition of the QoS mapping table identification is realized in the following two ways: one is to increase the QoS mapping table identification field in the QoSMap Configure frame; the other is to increase the QoS mapping table identification field in the QoS mapping table.

As shown in Figure 11, when adding the QoS mapping table identification field in the QoS Map Configure frame in this embodiment, the implementation process of the STA updating the local QoS mapping table through the QoS mapping table identification is as follows:

Step 1100, the STA completes the association/re-association (Association) with the AP.

Step 1101, the STA and the AP complete the EAP authentication, that is, the STA receives the EAP-Success message.

Step 1102, the AP associates the STA with the virtual local area network/tunnel VLAN/Tunnel, and the AP establishes an association relationship between the STA and the corresponding QoS mapping table according to the information.

Step 1103, the STA obtains the transmission key of the air interface, that is, completes the four-way handshake.

Step 1104, STA requests QoS mapping table to AP through QoS Map Request frame (Action frame).

Step 1105, the AP selects the QoS mapping table corresponding to the STA and the QoS mapping table identifier corresponding to the QoS mapping table.

Step 1106, the AP sends the selected QoS mapping table and the QoS mapping table identifier to the STA through the QoS MapConfigure frame.

Step 1107, after receiving the QoS Map Configure frame, the STA saves the QoS mapping table and the QoS mapping table identifier in the frame, and establishes a corresponding relationship between the two.

Step 1108, when the QoS mapping table in the AP is updated, the AP sends the updated QoS mapping table through the QoS Map Configure frame, and the QoS Map Configure frame carries the updated QoS mapping table and the QoS mapping table corresponding to the QoS mapping table logo.

Step 1109, after receiving the QoS Map Configure frame, the STA compares the QoS mapping table identification in the frame with the locally saved QoS mapping table identification, and updates the local QoS mapping table to the update issued by the AP when the two are consistent QoS mapping table, otherwise the local QoS mapping table will not be updated.

When adding the QoS mapping table identification field in the QoS Map Configure frame, the frame body format of the QoS MapConfigure frame is shown in Table 5, and a Map ID field is added in the frame body of the existing QoS Map Configure frame, and the value of this field is AP The value of the QoS mapping table identifier assigned to the corresponding QoS mapping table; adding the Map ID field in the frame body of the QoS Map Configure frame is not limited to the positions in Table 5.

Serial number Order Information 0 Category Category 1 Action 2 Dialog Token 3 Mapping ID Map ID 4 QoS Map Set

table 5

In order for the MAC layer of the AP to assemble the QoS Map Configure frame with the QoS mapping table identifier and the SME of the STA to correctly obtain the QoS mapping table identifier corresponding to the QoS mapping table, it is necessary to modify the existing primitives, mainly The modification is as follows: Add the Map ID parameter in the MLME-QoSMap.response primitive. The main function of this parameter is that the SME of the AP sends the message of the QoS mapping table identification parameter corresponding to the QoS mapping table parameter in this primitive to the MAC layer. In this way, the MAC layer can assemble the QoS Map Configure frame with the QoS mapping table identifier; in addition, add the Map ID parameter in the MLME-QoSMap.confirm primitive. The message of the QoS mapping table identification parameter corresponding to the parameter is sent to the SME, so that the SME can correctly obtain the QoS mapping table identification corresponding to the QoS mapping table; if the corresponding processing between the QoS mapping table and the QoS mapping table identification is completed at the MAC layer, then Existing primitives need to be modified to meet the same requirements.

As shown in Figure 12, when adding the QoS mapping table identification field in the QoS mapping table in this embodiment, the implementation process of STA updating the local QoS mapping table through the QoS mapping table identification is as follows:

Step 1200 to step 1204: the same as above step 1100 to step 1104.

Step 1205, the AP selects the QoS mapping table corresponding to the STA, and the QoS mapping table contains the corresponding QoS mapping table identifier.

Step 1206, the AP sends the selected QoS mapping table to the STA through the QoS Map Configure frame.

Step 1207, after receiving the QoS Map Configure frame, the STA saves the QoS mapping table in the frame.

Step 1208, when the QoS mapping table in the AP is updated, the AP sends the updated QoS mapping table through the QoS Map Configure frame, and the QoS mapping table includes the QoS mapping table identifier.

Step 1209, STA compares the QoS mapping table identification in the QoS mapping table with the QoS mapping table identification in the locally saved QoS mapping table after receiving the QoS Map Configure frame, and updates the local QoS mapping table when both are consistent The updated QoS mapping table issued by the AP, otherwise the local QoS mapping table will not be updated.

When adding the QoS mapping table identification field in the QoS mapping table, the specific format of the QoS mapping table is shown in Table 6. Add the Map ID field in the existing QoS mapping table. The value of this field is the value assigned by the AP for this QoS mapping table The value identified by the QoS mapping table; the addition of the Map ID field in the QoS mapping table is not limited to the positions in Table 6.

Serial number Order Size Size(octets) Description Description 1 1 Element ID 2 1 length 3 2 Mapping table ID 4 2 DSCP exception element #1 (optional) 5 2 DSCP exception element #2 (optional) 5+n-2 2 DSCP exception element #n (optional) 6+n-2 2 UP 0 DSCP range element 7+n-2 2 UP 1 DSCP range element 8+n-2 2 UP 2 DSCP range elements 9+n-2 2 UP 3 DSCP range elements 10+n-2 2 UP 4 DSCP range elements 11+n-2 2 UP 5 DSCP range elements 12+n-2 2 UP 6 DSCP range elements

Serial number Order Size Size(octets) Description Description 13+n-2 2 UP 7 DSCP range elements

Table 6

Embodiment two:

In this embodiment, the STA determines whether to update the locally stored QoS mapping table to the updated QoS mapping table issued by the AP through the multicast address associated with the QoS mapping table.

After the AP receives the message from the STA requesting the QoS mapping table, it selects the corresponding QoS mapping table and the multicast address associated with the QoS mapping table and sends it to the STA, and the STA adds it to the multicast address identifier in the frame after receiving it. When the QoS mapping table in the AP is updated, the AP sends the updated QoS mapping table to the STA through the above multicast address, so that only the STAs in the multicast group identified by the above multicast address can get the update other STAs not in the multicast group identified by the above multicast address will not obtain the updated QoS mapping table.

In this embodiment, the multicast address associated with the QoS mapping table can be realized in the following two ways: one is to increase the multicast address field or the multicast address cell in the QoS Map Configure frame; the other is to add it in the QoS mapping table Added multicast address field.

As shown in Figure 13, when adding a multicast address field or a multicast address cell in the QoS Map Configure frame in this embodiment, the implementation process for the STA to update the local QoS mapping table through the multicast address is as follows:

Step 1300 to step 1301: the same as above step 1100 to step 1101.

Step 1302, associating the STA with the virtual local area network, the AP selects a multicast address, and maintains the multicast address; and establishes an association relationship between the multicast address and the QoS mapping table.

Step 1303, the STA obtains the transmission key of the air interface, that is, completes the four-way handshake.

Step 1304, STA requests QoS mapping table to AP through QoS Map Request frame.

Step 1305, the AP selects the QoS mapping table corresponding to the STA.

Step 1306, the AP sends the selected QoS mapping table and the multicast address to the STA through the QoS Map Configure frame.

Step 1307, after receiving the QoS Map Configure frame, the STA saves the QoS mapping table and the multicast address in the frame, and establishes an association between the two.

Step 1308, when the QoS mapping table in the AP is updated, the AP sends the updated QoS mapping table through the QoS Map Configure frame, and the destination address in the QoS Map Configure frame is the multicast address.

Step 1309, after receiving the QoS Map Configure frame, the STA compares the multicast address in the frame with the multicast address it also saves, and updates the local QoS mapping table to the updated one issued by the AP when the two are consistent. QoS mapping table, otherwise the local QoS mapping table will not be updated.

The way to add the multicast address associated with the QoS mapping table in the QoS Map Configure frame is as follows: add a multicast address field in the QoS Map Configure frame or add a multicast address cell in the QoS Map Configure frame.

When adding the multicast address field in the QoS Map Configure frame, the frame body format of the QoS Map Configure frame is shown in Table 7, and the multicast address field is added in the frame body of the existing QoS Map Configure frame:

Serial number Order Information 0 Category Category 1 Action 2 Dialog Token 3 Quality of Service Mapping Table QoS Map Set 4 Multicast Address Multicast Address

Table 7

When adding a multicast address cell in the QoS Map Configure frame, the frame body format of the QoS Map Configure frame is shown in Table 8, and the multicast address cell is added in the frame body of the existing QoS Map Configure frame:

Serial number Order Information 0 Category Category 1 Action 2 Dialog Token 3 Quality of Service Mapping Table QoS Map Set 4 Multicast Address IE

Table 8

As shown in Figure 14, the multicast address cell includes an Element ID field, a Length field, and a Multicast Address field:

The value of the Element ID field is 60, and the value of the Element ID is not limited to this value;

The Length field is the length of the Multicast Address field, and its value is 6;

The Multicast Address field identifies a multicast group.

In the above implementation process, the multicast address field or multicast address cell in the QoS Map Configure frame sent by the AP when responding to the STA is mandatory, but the AP sends the QoS Map Configure frame containing the updated QoS mapping table to the STA When , the multicast address field or the multicast address cell in the frame is optional, and the destination address field in the frame is the multicast address identified by the multicast address field or the multicast address cell.

As shown in Figure 15, when the multicast address field is added in the QoS mapping table in this embodiment, the implementation process for the STA to update the local QoS mapping table through the multicast address is as follows:

Step 1500 to step 1504: the same as above step 1300 to step 1304.

Step 1505, the AP selects a QoS mapping table corresponding to the STA, and the QoS mapping table includes a multicast address field.

Step 1506, the AP sends the selected QoS mapping table to the STA through the QoS Map Configure frame.

Step 1507, after receiving the QoS Map Configure frame, the STA saves the QoS mapping table in the frame, parses out the multicast address, and establishes the association between the multicast address and the QoS mapping table.

Step 1508, when the QoS mapping table in the AP is updated, the AP sends the updated QoS mapping table through the QoS Map Configure frame, which contains a multicast address field, and the destination address in the QoS MapConfigure frame is the multicast broadcast address.

Step 1509: After receiving the QoS Map Configure frame, the STA compares the multicast address in the frame with the locally saved multicast address, and updates the local QoS mapping table to the updated QoS issued by the AP when the two are consistent mapping table, otherwise the local QoS mapping table will not be updated.

When adding the multicast address field in the QoS mapping table, the frame body format of the QoS Map Configure frame is shown in Table 9, and the multicast address field is added in the existing QoS mapping table:

Serial numberOrder Size Size(octets) Description Description 1 1 Element ID 2 1 length 3 6 multicast address 4 2 DSCP exception element #1 (optional) 5 2 DSCP exception element #2 (optional) 5+n-2 2 DSCP exception element #n (optional) 6+n-2 2 UP 0 DSCP range element 7+n-2 2 UP 1 DSCP range element 8+n-2 2 UP 2 DSCP range elements 9+n-2 2 UP 3 DSCP range elements 10+n-2 2 UP 4 DSCP range elements 11+n-2 2 UP 5 DSCP range elements 12+n-2 2 UP 6 DSCP range elements

Serial numberOrder Size Size(octets) Description Description 13+n-2 2 UP 7 DSCP range elements

Table 9

Embodiment three:

In this embodiment, when the QoS mapping table in the AP is updated, the AP sends the QoS Map Configure frame containing the updated QoS mapping table to the corresponding STA in unicast mode, and the STA that receives the frame updates the local QoS mapping table .

A schematic structural diagram of a communication system in this embodiment is shown in FIG. 16 , the system includes a terminal device (STA) 160 and an access device (AP) 161; the access device 161 sends a request message to the terminal device 160 Containing a response message of the QoS mapping table, and sending an update message containing an updated QoS mapping table to the terminal device 160 by unicast, the destination address of the update message being a media access control (MAC) address of a certain terminal device; The terminal device 160 is configured to update the local QoS mapping table according to the QoS mapping table in the update message.

As shown in Figure 16, the access device 161 includes: a receiving unit 1610 for receiving a message sent by the terminal device 160, the message including a request message for requesting a QoS mapping table sent by the terminal device 160; a selection unit 1611 for actively selecting Or select the QoS mapping table corresponding to the terminal device 160 according to the request message sent by the terminal device 160; the sending unit 1612 is used to send a response message containing the QoS mapping table to the terminal device 160 according to the request message, and update the QoS mapping table At this time, an update message including the updated QoS mapping table is sent to the terminal device 160 in a unicast manner.

The terminal device 160 includes: a sending unit 1600 for sending a request message requesting a QoS mapping table to the access device 161; a receiving unit 1601 for receiving a message containing a QoS mapping table sent by the access device 161, the message including the QoS mapping table message of the access device 161 The response message and update message sent by 161; the storage unit 1602 is used to store the QoS mapping table in the response message locally; the updating unit 1603 updates the QoS mapping in the storage unit 1602 according to the QoS mapping table in the update message surface.

In this embodiment, the process of updating the local QoS mapping table by the STA is shown in Figure 8. In step 807, the AP sends the QoS Map Configure frame containing the updated QoS mapping table to the STA in unicast mode, and the destination address of the unicast It is the MAC address of the STA that needs to receive this frame; when the STA receives the QoS Map Configure frame, it updates the local QoS mapping table according to the QoS mapping table in the QoS Map Configure frame.

In order for the AP to correctly set the destination address in the QoS Map Configure frame to the MAC address of a specific STA, it is necessary to modify the Non-AP QSTAAddress parameter definition of the MLME-QoSMap.response primitive. The modification method is: This parameter is changed to a unicast address or a multicast/broadcast address (this parameter is a multicast/broadcast address in existing documents), and the unicast address is the MAC address of the STA receiving the frame.

By adopting the technical scheme of the present invention, when the quality of service mapping table on the network side of the terminal device is updated, it can correctly judge whether to update the locally stored quality of service mapping table according to the identification information of the service quality mapping table; When the quality of service mapping table is updated, the network side sends the updated quality of service mapping table through unicast mode, and the terminal equipment can also correctly update the locally saved quality of service mapping table; the present invention effectively avoids errors caused by terminal equipment updating The quality of service mapping table saved locally causes the problem that the quality of service cannot be handled normally, so that the terminal device can work more effectively.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (16)

1. A method for distinguishing a quality of service mapping table, characterized in that, comprising steps: The network side sends a message including the quality of service mapping table and its identification information; When the message is a response message sent by the network side after receiving a message requesting a QoS mapping table, the terminal device receiving the response message locally saves the QoS mapping table and its identification information; When the message is an update message sent by the network side, after receiving the update message, the terminal device determines that the identification information in the message is consistent with the local identification information, and uses the service quality mapping table in the update message to update the local quality of service mapping table. 2. The method according to claim 1, wherein the message is an update message sent by the network side, and the terminal device discards the update message when there is no service quality mapping table locally. 3. The method according to claim 1, wherein the identification information of the quality of service mapping table is an identification of the quality of service mapping table; or, the identification information is a multicast address for sending the message. 4. The method according to claim 3, characterized in that, the identifier of the quality of service mapping table is a domain name, an identifier or a number of a contracted service providing network. 5. The method according to claim 3, wherein when the identification information is a multicast address for delivering the message, the destination address of the message is set as the multicast address. 6. The method according to any one of claims 1 to 5, wherein the quality of service mapping table identification field is added to carry the identification information in the frame body of the quality of service mapping configuration frame sent by the network side; A QoS mapping table identification field is added to the QoS mapping table in the frame body to carry the identification information. 7. The method according to any one of claims 1 to 5, wherein a multicast address field or a multicast address cell is added to carry the identification information in the quality of service mapping configuration frame sent by the network side; or, A multicast address field is added to the QoS mapping table in the frame body to carry the identification information. 8. The method according to claim 7, wherein the multicast address information element comprises an element identification field, a length field and a multicast address field. 9. A method for updating a quality of service mapping table, comprising the steps of: The network side sends an update message including the updated QoS mapping table through unicast; The terminal device that receives the update message updates the local quality of service mapping table according to the service quality mapping table in the update message. 10. The method according to claim 9, wherein the destination address in the update message is set as the MAC address of the terminal device. 11. A network device, characterized in that it comprises: a receiving unit, configured to receive messages sent by other communication devices; A selection unit, configured to select the quality of service mapping table and its identification information corresponding to other communication devices according to the request message or actively; A sending unit, configured to send a message including the QoS mapping table and its identification information. 12. The network device according to claim 11, wherein the identification information of the quality of service mapping table is an identification of the quality of service mapping table; or, the identification information is a multicast address for sending messages. 13. The network device according to claim 12, characterized in that, the QoS mapping table identification field is added to carry the identification information in the frame body of the QoS mapping configuration frame sent; or, in the frame body A QoS mapping table identification field is added to the QoS mapping table to carry the identification information. 14. The network device according to claim 12, characterized in that, adding a multicast address field or a multicast address cell to carry the identification information in the quality of service mapping configuration frame sent; or, in the frame body The multicast address field is added in the QoS mapping table to carry the identification information. 15. A terminal device, characterized in that it comprises: a receiving unit, configured to receive a message including a quality of service mapping table and its identification information; a storage unit, configured to store the quality of service mapping table and its identification information; A comparing unit, configured to compare the identification information of the quality of service mapping table in the received message with the identification information of the saved quality of service mapping table; An updating unit, configured to update the quality of service mapping table in the storage unit according to the quality of service mapping table in the message when the identification information in the received message is consistent with the saved identification information. 16. A communication system, characterized in that it comprises: The network device is configured to send a message including the quality of service mapping table and its identification information to the terminal device; The terminal device is configured to receive a response message after requesting the message of the quality of service mapping table from the network device, and store locally the quality of service mapping table and its identification information carried in the response message; or to receive an update message, and determine the After the identification information in the message is consistent with the local identification information, the local quality of service mapping table is updated by using the service quality mapping table in the update message.

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