WO2013064076A1

WO2013064076A1 - Information packet transmitting and receiving method and device in ibss system

Info

Publication number: WO2013064076A1
Application number: PCT/CN2012/083861
Authority: WO
Inventors: 刘孟红
Original assignee: 华为技术有限公司
Priority date: 2011-10-31
Filing date: 2012-10-31
Publication date: 2013-05-10
Also published as: CN103096436B; CN103096436A

Abstract

The present invention relates to an information packet transmitting and receiving method and device in an IBSS system, the information packet receiving method in the IBSS system comprising: receiving a first field in an IBSS information packet, the first field comprising the first partial address information of a receiving terminal; matching the second partial address information of the IBSS system with the first partial address information; if the matching succeeds, then continuing the reception of a second field in the IBSS information packet, the second field comprising the first address information of the receiving terminal; matching the second partial address information of the IBSS system with the first address information, if the matching fails, then aborting the reception of the IBSS information packet, and if the matching succeeds, then continuing the reception of the IBSS information packet. An embodiment of the present invention can conduct partial matching after receiving the first field of the IBSS information packet, and if the matching fails, the reception of the information packet can be aborted without the need to receive the second field, thus saving processing time, simplifying the processing procedure and effectively reducing power consumption.

Description

Method and device for transmitting and receiving information packets in IBSS system

The present invention relates to the field of mobile communications, and in particular, to a method and apparatus for transmitting and receiving information packets in an IBSS system. Background technique

FIG. 1 is a schematic diagram of a prior art wireless local area network. As shown in the figure, a basic service set (BSS) is a basic component of a wireless local area network (WLAN). Stations (STAs) that are within a certain coverage area and have some associations form a BSS, such as BBS1, BBS2, and BBS3.

The most basic form of association between BBSs is that each station communicates directly with each other in an ad hoc network, called Independent BSS (IBSS), as shown in Figure 1 for BSS1. IBSS is also known as ad hoc network. An IBSS system can contain at least one site, and the simplest is to include only two sites, such as BBS2 and BBS3.

The STA can be associated with a central site that manages the BSS, which is called an Access Point (AP), as shown in the figure, ATA 3. The BSS built around the AP is called the infrastructure BSS, such as STA4, STA5, and STA6. The BSS with the basic implementation can be interconnected by the AP through a distributed system (DS), and an extended service set (ESS) is formed by the BSSs connected by the DS.

In the IBSS system, communication can be performed using the 802.lacc standard. The 802.llac physical layer frame includes a Data field, and the Data field includes a MAC Protocol Data Unit (MPDU), and the MPDU includes a media access control (MAC) layer receiving address of the receiving end. Packets can be classified into unicast packets, multicast packets, and broadcast packets according to the MAC layer receiving address. The MAC layer receiving address of the unicast packet corresponds to one site; the MAC layer receiving address of the multicast packet corresponds to a group of stations; the MAC layer receiving address of the broadcast packet is all 48 bits, corresponding to the BSS/IBSS All sites in .

The existing unicast packet interaction method in the I BSS system is that the sending end station generates and sends a unicast information packet, and the receiving end station receives the Da ta field, parses out the MAC layer receiving address, and uses its own MAC address to perform matching. If there is no match, the unicast packet is not received, and if it matches, the unicast packet is received.

Therefore, all stations in the I BSS system need to receive and parse the MAC receiving address in the Da ta field to know whether the packet should be received, so the amount of information processing is relatively large, thereby making the power consumption of the IBSS site relatively large. , increased processing costs. Summary of the invention

The embodiment of the invention provides a method and a device for transmitting and receiving a packet in an IBS S system, which can perform address matching on an IBSS packet in advance, and abandon the non-locally received IBSS packet in advance, thereby speeding up the judgment processing speed. , saving time cost and power consumption.

An embodiment of the present invention provides a method for receiving a packet in an IBS S system, where the method includes:

Receiving a first field in the IBSS packet, where the first field includes the first part of the address information of the receiving end;

And matching, according to the first part of the address information, with the second part of the address information of the second part, if the matching fails, abandoning to continue receiving the IBSS information packet; if the matching is successful, continuing to receive the second field in the IBSS information packet, where The second field includes first address information of the receiving end;

Matching the first address information with its own second address information, if the matching fails, abandoning to continue receiving the IBSS information packet, and if the matching is successful, continuing to receive the IBSS information packet.

The embodiment of the invention further provides a method for sending a packet in an I BSS system, the method comprising:

Generating an IBSS packet including a first field, where the first field includes the first part of the receiving end Sub-address information;

Send the IBSS packet.

The embodiment of the invention further provides a device for receiving a packet in an IBSS system, the device comprising:

a first receiving unit, configured to receive a first field in an IBSS packet, where the first field includes first part address information of the receiving end;

a first matching unit, configured to perform matching with the second partial address information according to the first partial address information, and if the matching fails, abandon the continuation of receiving the IBSS information packet;

a second receiving unit, configured to continue to receive the second field in the IBSS packet if the matching succeeds, where the second field includes first address information of the receiving end;

a second matching unit, configured to perform matching with the second address information of the first address information according to the first address information, and if the matching fails, to abort to continue receiving the IBSS information packet;

And a third receiving unit, configured to continue to receive the IBSS information packet if the matching succeeds.

The embodiment of the invention further provides a device for transmitting a packet in an IBSS system, the device comprising:

a generating unit, configured to generate an IBSS packet including a first field, where the first field includes first part address information of the receiving end;

And a sending unit, configured to send the IBSS information packet.

The method and device for transmitting and receiving a packet in an IBSS system according to an embodiment of the present invention may perform partial matching after receiving the first field of the IBSS packet, and need not continue to receive the second field after the first matching fails. The packet can be discarded, and only after the first matching is successful, the second field needs to be connected to determine whether the receiving end is the receiving end of the unicast packet according to the complete address information, thereby saving processing time and reducing The processing process effectively reduces power consumption. DRAWINGS 1 is a schematic diagram of a prior art wireless local area network;

2 is a flowchart of a method for transmitting a packet in an IBSS system according to an embodiment of the present invention; FIG. 3 is a flowchart of a method for receiving a packet in an IBSS system according to an embodiment of the present invention; FIG. 4 is a packet of an IBSS system according to an embodiment of the present invention; Schematic diagram of the transmitting device;

FIG. 5 is a schematic diagram of a packet receiving apparatus in an IBSS system according to an embodiment of the present invention. detailed description

The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments. The method and device for receiving a packet in the IBSS system according to the embodiment of the present invention improves the VHT-SIG-A field in the existing 802.11 lac packet, and inserts part of the address information, thereby being available at the receiving end. Pre-judgment is performed before receiving the packet.

2 is a flowchart of a method for sending a packet in an IBSS system according to an embodiment of the present invention. As shown in the figure, the embodiment includes the following steps:

Step 100: The sending end station generates a unicast IBSS packet including a first field, where the first field includes the first part of the address information of the receiving end.

Because the communication between the sender site and the receiver site communicates using the 802. l lac standard, Table 1 is the 802. l lac packet field table:

Table 1

VHT-SIG-B Very High Throughput Signaling B Field (VHT Signal B field)

Data data field, carrying the MAC layer protocol data unit (MPDU)

The VHT-SIG-A field is divided into two parts: VHT-SIG-A1 and VHT-SIG-A2. The first field is the VHT-SIG-A1 field. Table 3 shows the contents of VHT-SIG-A1.

table 3

The sender sets the Partial AID in the first field VHT-SIG-A1 as the first part of the address information of the receiving end station, usually a partial MAC address, in the sent packet.

Part of the MAC address is usually set to a specific number of MAC addresses, because the Partial AID has 9 bits (B13-B21), which can be set to any 9 bits of the receiving station's MAC address, for example, set to the lower of the receiving station's MAC address. 9-bit address; or set to the upper 9-bit address of the receiving station's MAC address; or set to the receiving station's MAC address through the hash function mapping 9-bit bit.

In addition, the second field is further included in the IBSS packet, where the second field includes the first address information of the receiving end, and the second field is the Data field in the IBSS packet, because the MPDU in the Data field includes the first address of the receiving end. Information, usually the MAC layer receiving address;

Step 101: The sending end station sends the unicast IBSS information packet.

FIG. 3 is a flowchart of a method for receiving a packet in an IBSS system according to an embodiment of the present invention. As shown in the figure, the embodiment includes the following steps:

Step 201: The receiving end station receives a first field in the IBSS information packet, where the first field includes the first part of the address information of the receiving end.

The first field received in this step is the VHT-SIG-A1 field of the IBSS packet sent by the sender station in the previous embodiment, and the first part of the address information is the reception of the Partial AID setting in the VHT-SIG-A1 field. Part of the MAC address of the end station;

Referring to Table 1, when the receiving end station receives the IBSS information packet, it is received from the left to the right of Table 1. After obtaining the partial MAC address of the receiving end station from the Partial AID in the VHT-SIG-A1 field, According to step 202, it is determined whether to continue to receive the IBSS information packet of the subsequent part. Step 202: The receiving end station matches the second partial address information according to the first partial address information, and if the matching fails, step 210 is performed, and if the matching succeeds, the execution is performed. Step 203;

This step is the first match. The receiving site matches the partial MAC address contained in the Partial AID in the received VHT-SIG-A1 field with its own partial MAC address. Because the partial MAC address of the Partial AID is 9 bits, the receiving site also needs to use the MAC. The 9 bits in the address are matched, such as the lower 9-bit address of the MAC address, or the upper 9-bit address of the MAC address, or the 9-bit bit obtained by mapping the MAC address through the hash function.

Step 203: The receiving end station continues to receive the second field of the IBSS packet, where the second field includes the first address information of the receiving end.

The second field is the Data field in the IBSS packet, because the MPDU in the Data field includes the first address information of the receiving end, and is usually the MAC layer receiving address; As shown in Table 1, the receiving end station has started receiving the Data field at this time. After obtaining the MAC layer receiving address from the Data field, it is determined according to step 204 whether to continue receiving the subsequent part of the IBSS information packet.

Step 204, the receiving end station according to the first address information and its own second address information to match, if the matching fails, step 210 is performed, if the matching is successful, step 205 is performed;

This step is to perform the second match. After the first partial MAC address is successfully matched, the received complete MAC address is used to match its complete MAC address.

Step 205: Continue receiving, by the receiving end station, the IBSS information packet.

If the two matches are successful, it indicates that the receiving end is the receiving end of the IBSS packet sent by the transmitting end unicast. At this time, the receiving end continues to receive the IBSS information packet, and then see Table 1, because it is already at this time. After receiving the Data field, this step is to continue receiving the remaining part of the Data field. The information packet can be divided into three categories: control packet, management packet and data packet.

Step 210: The receiving end station abandons to continue receiving the IBSS information packet.

If the first or second match is unsuccessful, it indicates that the receiving end is not the receiving end of the IBSS packet sent by the transmitting end unicast, and therefore, the remaining part of the IBSS packet is discarded.

In particular, the 802.lacc standard has a null data packet (NDP) that does not contain a Data field. The null data packet frame is used for receiving sounding measurement at the receiving end, and the null data packet frame can be sent to one. Or multiple receiving ends, because the null data packet frame does not contain the MAC layer receiving address, the receiving end is usually indicated in a Null Data Packet Announcement (NDPA) frame sent before the null data packet frame. In the embodiment of the present invention, if the data packet frame is sent to only one receiving end, the empty data packet frame is also considered to be a unicast IBSS information packet, and the Partial AID in the NDP may be set as a partial MAC address of the receiving end.

In the method for receiving and transmitting a packet in the IBSS system according to the embodiment of the present invention, after the VHT-SIG-A1 field needs to be received by the existing method, the Data field must be received, and the matching can be performed according to the complete MAC address. After receiving the VHT-SIG-A1 field, partial matching can be performed, and the Partial AID part in the VHT-SIG-A1 field is set as a partial MAC address, when the first After the second match fails, it is not necessary to continue receiving the subsequent fields of the IBSS packet to abandon the reception of the IBSS packet, and only after the first match is successful, it is necessary to continue to receive the Da ta field to determine whether the receiver is based on the complete MAC address. It is the receiving end of the unicast IBSS packet, which saves processing time and reduces the processing process, effectively reducing power consumption.

FIG. 4 is a schematic diagram of a packet sending apparatus according to an embodiment of the present invention. As shown in the figure, the embodiment includes: a generating unit 31 and a sending unit 32.

The generating unit 31 is configured to generate an IBSS packet that includes a first field, where the first field includes the first part of the address information of the receiving end. In addition, the IBSS information packet generated by the generating unit further includes a second field, where the second field The first address information of the receiving end is included.

The sending unit 32 is configured to send the IBSS information packet.

In the packet sent by this embodiment, the Par t ia l AID in the first field VHT-S IG-A1 is set as the first part of the address information of the receiving end station, usually a partial MAC address. Part of the MAC address is usually set to a specific number of MAC addresses, because the Par t ia l AID has 9 bits (B1 3-B21), which can be set to any 9 bits of the receiving station's MAC address, for example, set to the receiving site. The lower 9-bit address of the MAC address; or the upper 9-bit address of the receiving station's MAC address; or the 9-bit bit obtained by the hash function mapping of the receiving station's MAC address. The IBSS packet further includes a second field, where the second field includes first address information of the receiving end, and the second field is a Da ta field in the IBSS packet, because the MPDU in the Da ta field includes the first address information of the receiving end. , usually the MAC layer receives the address.

FIG. 5 is a schematic diagram of a packet receiving apparatus according to an embodiment of the present invention. As shown in the figure, the embodiment includes: a first receiving unit 11, a first matching unit 21, a second receiving unit 12, a second matching unit 22, and a third Receiving unit 13 3.

The first receiving unit 11 receives the first field in the IBSS information packet, where the first field includes the first part of the address information of the receiving end; the first receiving unit 1 1 is specifically configured to receive the VHT-S in the receiving IBSS information packet. IG-A1 field.

As shown in Table 1, the receiving end station receives the IBSS packet from the left to the right of Table 1. After receiving the partial MAC address of the receiving end station from the Partial AID in the VHT-SIG-A1 field, it is determined according to the first matching unit whether to continue receiving the subsequent part of the IBSS information packet; the first field VHT-SIG- The Partial AID in A1 is set to the partial address information of the receiving site, usually a partial MAC address. Part of the MAC address is usually set to a specific number of MAC addresses. Since the Partial AID has 9 bits (B13-B21), it can be set to any 9-bit bit of the receiving station's MAC address, for example, set to the low of the receiving station's MAC address. 9-bit address; or set to the upper 9-bit address of the receiving station's MAC address; or set to the 9-bit bit obtained by the receiving-site MAC address through the hash function mapping.

The first matching unit 21 is configured to perform matching with the second partial address information according to the first partial address information, and if the matching fails, abandon the continuation of receiving the IBSS information packet; the first matching unit 21 matches the partial address information to specifically match the partial media. Access control MAC address information.

The first matching unit 21 matches the partial MAC address of the Partial AID in the received VHT-SIG-A1 field with its partial MAC address. Since the partial MAC address of the Partial AID is 9 bits, the receiving site also needs to use. The 9 bits in the MAC address are matched, such as the lower 9-bit address of the MAC address, or the upper 9-bit address of the MAC address, or the 9-bit bit obtained by mapping the MAC address through the hash function.

The second receiving unit 12 is configured to continue to receive the second field of the IBSS packet if the matching is successful, where the second field includes the first address information of the receiving end, and the second receiving unit 12 is specifically configured to receive the received IBSS information packet. The Data field. The second field is the Data field in the IBSS packet, because the MPDU in the Data field includes the first address information of the receiving end, usually the MAC layer receiving address.

The second matching unit 22 is configured to perform matching with the second address information of the first address information according to the first address information, and if the matching fails, to abort to continue receiving the IBSS information packet; the matching information of the second matching unit 22 is specifically matching the MAC address information.

The second matching unit 22 performs a secondary matching. After the first partial MAC address is successfully matched, the received complete MAC address is matched with its own complete MAC address, and the matching is performed. It is already the first match after matching the filter.

The third receiving unit 13 is configured to continue receiving the IBSS packet if the matching is successful. If the two matches are successful, it means that the receiving end is the receiving end of the sending end that wants to send the IBSS packet unicast. At this time, the receiving end continues to receive the IBSS information packet, and then see Table 1, because it is already at After receiving the Da ta field, this step is to continue receiving the remaining part of the Da ta field, and the information packet can be divided into three categories: control packet, management packet and data packet. If the second match is unsuccessful, the receiver is not the receiver of the packet sent by the sender unicast, and thus the receiver is discarded.

The receiving and transmitting apparatus of the information packet in the IBSS system of the embodiment of the present invention can perform partial matching after receiving the VHT-SIG-A1 field, and utilizes the Par t ia l AID part setting in the VHT-S IG-A1 field. For a partial MAC address, after the first match fails, it is not necessary to continue to receive subsequent fields of the IBSS packet to abandon the reception of the IBSS packet, and only after the first match is successful, it is necessary to continue receiving the Da ta field according to the complete The MAC address is used to determine whether the receiving end is the receiving end of the unicast IBSS packet, so the processing time is saved, and the processing is reduced, and the power consumption is effectively reduced.

A person skilled in the art should further appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

The steps of a method or algorithm described in connection with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both. Software modules can be placed in random access memory (RAM), memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or technical field Any other form of storage medium known. The above described embodiments of the present invention are further described in detail, and the embodiments of the present invention are intended to be illustrative only. The scope of the protection, any modifications, equivalents, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Rights request

A method for receiving a packet in an IBSS system, the method comprising:

The method for receiving a packet in an IBSS system according to claim 1, wherein the receiving the first field in the IBSS packet comprises: receiving a VHT-SIG-A1 field in the IBSS packet The VHT-SIG-A1 field includes the first part of the address information of the receiving end.

The method for receiving a packet in an IBSS system according to claim 2, wherein the Par t ia l AID field in the VHT-SIG-A1 field is the first part of the address information of the receiving end.

The method for receiving a packet in an IBSS system according to claim 1, wherein the receiving the second field of the IBSS packet comprises: receiving a Da ta field in the IBSS packet, the Da The ta field includes the first address information of the receiving end.

The method for receiving a packet in an IBSS system according to claim 2 or 4, wherein the matching part address information is specifically a matching part of the medium access control MAC address information, and the matching address information is specifically matched. MAC address information.

The method for receiving a packet in an IBSS system according to claim 5, wherein the matching part of the MAC address information is specifically MAC address information matching any particular number of bits.

The method for receiving a packet in an IBSS system according to claim 6, wherein the MAC address information matching any particular number of bits is specifically a MAC matching a lower specific number of bits. Address information, or MAC address information matching a certain number of bits of a high order, or MAC address information matching a specific number of bits mapped by a hash function.

A method for transmitting a packet in an IBSS system, the method comprising: generating an IBSS packet including a first field, where the first field includes first portion address information of the receiving end;

Send the IBSS packet.

The method for transmitting a packet according to claim 8, wherein the first field is a VHT-SIG-Al field, and the VHT-S IG-Al field includes a first part of address information of the receiving end.

The method for transmitting a packet in an IBSS system according to claim 9, wherein the Part ia l AID field in the VHT-SIG-Al field is set as the first part of the address information of the receiving end.

The method for transmitting a packet in an IBSS system according to claim 8, wherein the first partial address information is a partial MAC address.

12. The method of transmitting a packet in an IBSS system according to claim 11, wherein the partial MAC address is a MAC address of any particular number of bits.

The method for transmitting a packet in an IBSS system according to claim 12, wherein the MAC address of the specific specific number of bits is specifically a MAC address of a lower specific bit number, or a MAC address of a higher specific bit number, Or a MAC address of a specific number of bits mapped by a hash function.

The method for transmitting a packet in an IBSS system according to claim 8, wherein the generated IBSS packet further includes a second field, and the second field includes first address information of the receiving end.

The method for transmitting a packet in an IBSS system according to claim 14, wherein the first address information is a MAC address.

A device for receiving a packet in an IBSS system, the device comprising: a first receiving unit, configured to receive a first field in an IBSS packet, where the first field is encapsulated Including the first part of the address information of the receiving end;

The apparatus for receiving a packet in an IBSS system according to claim 16, wherein the first receiving unit is specifically configured to receive a VHT-SIG-A1 field in the received IBSS packet.

The apparatus for receiving a packet in an IBSS system according to claim 16, wherein the second receiving unit is specifically configured to receive a Da ta field in the received IBSS packet.

The apparatus for receiving a packet in the IBSS system according to claim 17 or 18, wherein the first matching unit matching part address information is specifically a matching part of the medium access control MAC address information, and the second matching unit The matching address information is specifically matching MAC address information.

A device for transmitting a packet in an IBSS system, the device comprising: a generating unit, configured to generate an IBSS packet including a first field, where the first field includes a first portion of address information of the receiving end ;

And a sending unit, configured to send the IBSS information packet.

The apparatus for transmitting a packet according to claim 20, wherein the IBSS packet generated by the generating unit further includes a second field, and the second field includes first address information of the receiving end.