CN100561964C - The machinery of consultation of IP header-compressed in a kind of WLAN (wireless local area network) - Google Patents
The machinery of consultation of IP header-compressed in a kind of WLAN (wireless local area network) Download PDFInfo
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- CN100561964C CN100561964C CNB2006101496828A CN200610149682A CN100561964C CN 100561964 C CN100561964 C CN 100561964C CN B2006101496828 A CNB2006101496828 A CN B2006101496828A CN 200610149682 A CN200610149682 A CN 200610149682A CN 100561964 C CN100561964 C CN 100561964C
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Abstract
The invention discloses the negotiation processing method of IP header-compressed in a kind of WLAN (wireless local area network), comprising: terminal sends the request of IP header-compressed according to the parameter of the business that starts the IP header-compressed to WAP (wireless access point); The WAP (wireless access point) that receives the request of IP header-compressed is according to request content and the request of network configuration process IP header-compressed, determine target network entity, and send the indication of IP header-compressed or transmit the request of IP header-compressed to target network entity to target network entity; The network entity that receives IP header-compressed indication is replied IP header result, and the wireless access result that names a person for a particular job returns to terminal.Adopt the inventive method, can prolong the transmission path of the IP data of compression the biglyyest, reduce the transmission delay on the path, improve the ratio that loads in the transmission course, improve transmission quality the business of delay sensitive; Can realize whole unified distribution, avoid the confusion in IP header-compressed and the recovery process.
Description
Technical field
The present invention relates to the wireless local area network (WLAN) system in the communications field, relate in particular to the negotiation method of IP header-compressed in the WLAN (wireless local area network).
Background technology
WLAN (WLAN (wireless local area network)) is meant that the employing wireless communication technology is interconnected with computer equipment, and formation can the mutual communication and the network system that realizes resource-sharing.In the wlan network environment, an extended service set is by one or more Basic Service Sets, and the compartment system formation that connects these Basic Service Sets, and each Basic Service Set comprises a wireless access point device.The expansion service group is distinguished by ESSID (extended service set identifier), and WAP (wireless access point) is distinguished by BSSID (Basic Service Set identifier).Terminal is obtained extended service set and Basic Service Set information in the WLAN environment of living in by scanning channel, and selects to add a suitable Basic Service Set.
802.11 the physical layer that standard is an IEEE802.11 WLAN standard working group to be formulated and media interviews control (MAC) consensus standard are convenient to WLAN (wireless local area network) and radio equipment manufacturer and are set up mutual operation network equipment.Physical layer has defined the signal characteristic and the modulation of transfer of data.Media interviews controls (MAC) layer can be considered by a series of finishing such as the service of information exchange, power control, associate management, management by synchronization and process management to be formed.
The IP header-compressed is a kind of reduction network management overhead commonly used in the point-to-point transmission, improves the method for the efficient of net load in transmission.In the transmission course of point-to-point, the header major part of transmission is the same, and is indeclinable, thus in transmission, only transmit the part of variation, at receiving terminal again according to the header reconstruct data bag of receiving in the past.
Be example with the voice application of using Real-time Transport Protocol.Code check is the voice application of 32Kbps, and general every 20ms produces a secondary data, and each data volume that produces is 80 bytes.These 80 bytes are through RTP, and UDP sends after three layers of processing of IP, and these three layers of meetings reach 40 bytes for 80 bytes increase network overheads.The data volume that then every 20ms need send becomes 120 bytes from 80 bytes, and valid data only occupy 66% of transmission total data.But, in these 40 bytes of each transmission, have only the timestamp of frame, contents such as sequence number change, contents such as other guide such as source address, destination address, udp port number, successively two frames all are the same.
If adopt the IP header compression technique, only transmit the part that changes in these data, just can become 2～4 bytes to the quantity of network overhead from 40 bytes, in 44 bytes of feasible each transmission, the ratio of net load brings up to 91%, thereby networks efficiency is got a promotion.This algorithm compresses the IP head, but can only be applied in the link of point-to-point, and can not be applied to end to end in the link.
WLAN (wireless local area network) works in physical layer and the MAC layer in the network model, and the transfer of data in the services set in WLAN (wireless local area network) all is to rely on the MAC Address of each network entity as address designation.Four MAC Address are arranged in the mac frame of WLAN (wireless local area network), have two Attribute domains (to DS, from DS) to be used for the whereabouts and the attribute of judgment data bag simultaneously.
The network configuration of WLAN (wireless local area network) and layout are fit to carry out the operation of IP header-compressed very much.But present protocol of wireless local area network does not have regulation how to concentrate in the basic service of WLAN (wireless local area network) to carry out the IP header-compressed and how to carry out IP header-compressed negotiations process between STA and the AP.The negotiations process of IP header-compressed must be discerned the characteristic of upper-layer service.
Summary of the invention
Purpose of the present invention is exactly to overcome the shortcoming that does not have complete IP header-compressed negotiation processing method in the prior art, proposes the method for handling through consultation of IP header-compressed in a kind of WLAN (wireless local area network).
The negotiation processing method of IP header-compressed is characterized in that in a kind of WLAN (wireless local area network), comprises the negotiations process when terminal is opened the IP header-compressed, these negotiations process following steps:
The first step, terminal sends to WAP (wireless access point) according to the parameter of the business that starts the IP header-compressed and opens IP header-compressed request and carry described parameter, and described parameter refers to the IP of the business datum that described terminal is obtained according to the characteristics and the configuring condition of upper-layer service and the relevant information in the upper-layer protocol control head;
Second step, the WAP (wireless access point) that receives the request of described unlatching IP header-compressed is handled the request of described unlatching IP header-compressed according to request content and network configuration, determine target network entity, and send unlatching IP header-compressed indication or transmit the request of described unlatching IP header-compressed to target network entity to target network entity;
The 3rd step received the result that network entity that this unlatchings IP header-compressed indicates is replied the IP header, and the described wireless access described result of naming a person for a particular job returns to terminal.
Further, the negotiation processing method of described IP header-compressed also comprises the negotiations process when terminal is closed the IP header-compressed, and this negotiations process comprises:
The first step, described terminal send to described WAP (wireless access point) and close the request of IP header-compressed, carry the mapping numbering of having distributed;
Second step, receiving the WAP (wireless access point) of closing the request of IP header-compressed handles this according to request content and network configuration and closes the request of IP header-compressed, determine target network entity, and close the indication of IP header-compressed or transmit the request of the described IP of closing header-compressed to target network entity to the target network entity transmission;
In the 3rd step, the network entity that receives the indication of the described IP of closing header-compressed is replied the result of IP header, and the described wireless access described result of naming a person for a particular job returns to terminal.
Consult the standing part of successful service in the IP of the data of transmitting terminal header and be compressed, BSS information when the MAC layer transmits under the carried terminal and mapping numbering; When receiving, according to BSS information of carrying in the MAC packet and the common IP header that recovers of mapping numbering at the target network entity place.
The method that the present invention proposes sends the request of IP header-compressed by terminal to WAP (wireless access point), and WAP (wireless access point) is carried out the judgement of target network entity according to the information in the request, distributes pre-mapping numbering.WAP (wireless access point) is to the target network entity IP header-compressed request that continues, until finishing of overall negotiation process.
The method of the invention possesses following advantage:
1, WAP (wireless access point) occurs as the transfer person's of IP header-compressed request identity, can realize terminal-WAP (wireless access point), terminal-WAP (wireless access point)-terminal, terminal-WAP (wireless access point)-WAP (wireless access point)-terminal, the negotiations process of the IP header-compressed under terminal-WAP (wireless access point)-transmission modes such as gateway; Finish wireless transmission in the BSS, twice wireless transmission in the BSS, an once wireless wire transmission in the BSS, the negotiations process of the IP header-compressed of twice wireless transmission in the ESS;
2, the negotiations process that provides by this method can prolong the transmission path of the IP data of compression the biglyyest, reduces the transmission delay of IP data on these paths, improves the ratio that loads in the transmission course, improves the transmission quality to the business of delay sensitive;
3, the IP header-compressed mapping relations in each BSS of wireless access point control can realize whole unified distribution, avoid the confusion in IP header-compressed and the recovery process.
Description of drawings
Fig. 1 is an IP header-compressed structural representation in the WLAN (wireless local area network);
Fig. 2 is the flow chart of the IP header-compressed of the method for the invention;
Fig. 3 is the flow chart of a specific embodiment of the method for the invention.
Embodiment
Below in conjunction with accompanying drawing, be described in detail inventing described method.
The method of the invention comprises the following steps: that terminal sends the request of IP header-compressed according to the parameter of the business that starts the IP header-compressed to WAP (wireless access point); The WAP (wireless access point) that receives the request of IP header-compressed is according to request content and the request of network configuration process IP header-compressed, determine target network entity, and send the indication of IP header-compressed or transmit the request of IP header-compressed to target network entity to target network entity; The network entity that receives IP header-compressed indication is replied IP header result, and the wireless access result that names a person for a particular job returns to terminal.
The request of above-mentioned IP header-compressed comprises: open IP header compression function request and close the request of IP header-compressed.
Above-mentioned terminal is meant characteristics and the configuring condition of STA according to its upper-layer service according to the parameter of the business that starts the IP header-compressed, obtain the relevant information in the control head of the IP of business datum and upper-layer protocol thereof, as source IP address, target ip address, the RTP parameter, RTCP parameter, UDP parameter, the TCP parameter, typical professional an IP and a upper-layer protocol control head thereof such as transmission time interval; If close the request of IP header-compressed then parameter comprise the mapping numbering of having distributed.
Above-mentioned terminal is meant to the request of WAP (wireless access point) transmission IP header-compressed according to the parameter of the business that starts the IP header-compressed: the WAP (wireless access point) among the BSS of terminal under it sends the request of IP header-compressed, carry complete IP and upper-layer protocol head thereof in the request, and identify the wherein fixing part and the part of variation;
The above-mentioned WAP (wireless access point) of IP header-compressed request that receives is according to request content and the request of network configuration process IP header-compressed, determine that target network entity is meant: WAP (wireless access point) is according to the relevant information in the IP header-compressed request that receives, judge that the target network entity of these professional data in this subnet (can be the terminal in this BSS, or other main frames in the ESS distributed system, WAP (wireless access point) or gateway).
WAP (wireless access point) according to request content and network configuration preassignment should business the mapping numbering of IP header-compressed; Then numbering is discharged if close the request of IP header-compressed according to the mapping numbering of carrying in the request.
The indication of above-mentioned IP header-compressed comprises opens the indication of IP header-compressed and closes the indication of IP header-compressed.
The WAP (wireless access point) of the above-mentioned IP of receiving header-compressed request sends the indication of IP header-compressed or transmits the request of IP header-compressed to target network entity to target network entity and is meant: if target network entity and transmission network entity are the other-ends in the same BSS, then send the indication of IP header-compressed to target network entity.
If target network entity and transmission network entity are the terminals under other interior WAP (wireless access point) of same ESS, then transmit the request of IP header-compressed.
If open the indication of IP header-compressed, then WAP (wireless access point) sends related content in preallocated IP header-compressed mapping numbering and the request of former IP header-compressed to target network entity, this indication is used for the notification target network entity has a business of having opened the IP header-compressed to send data to, and has distributed IP header-compressed numbering; If close the indication of IP header-compressed, then WAP (wireless access point) sends related content in preallocated IP header-compressed mapping numbering and the request of former IP header-compressed to target network entity, and this indication is used for the business that this IP header-compressed mapping of notification target network entity numbers will close the IP header compression function.WAP (wireless access point) need be carried preallocated IP header-compressed mapping numbering and be sent the IP header-compressed parameter of network entity when transmitting request.
The network entity of the above-mentioned IP of receiving header-compressed indication is replied IP header result and is meant target network entity according to the content in preallocated numbering and the indication information, and whether decision accepts the configuration of IP header-compressed.
The WAP (wireless access point) that receives the IP header-compressed request of forwarding distributes the IP header-compressed mapping in the new BSS to number, and sends the indication of IP header-compressed to the final goal terminal.Then discharge the mapping numbering if close the indication of IP header-compressed.
The result that names a person for a particular job returns to terminal and is meant above-mentioned wireless access: if open the IP header-compressed, WAP (wireless access point) replying then according to target network entity, terminal to former request IP header-compressed sends final process result, if success is then carried the mapping of formal distribution and numbered in the result.If close the IP header-compressed, then response results represents that mapping numbering discharges successfully or fails.
Consult the standing part of successful service in the IP of the data of transmitting terminal header and be compressed, BSS information when the MAC layer transmits under the carried terminal and mapping numbering; When receiving, according to BSS information of carrying in the MAC packet and the common IP header that recovers of mapping numbering at the target network entity place.
Radio local network environment of the present invention can be a Basic Service Set, or an extended service set.As shown in Figure 1.The IP header-compressed can be carried out in all wireless connections.Be without loss of generality, if terminal 1 is the source terminal of initiating the IP header-compressed, then the IP header-compressed can be in terminal 1 to WAP (wireless access point) 1, terminal 1 is to WAP (wireless access point) 1 to terminal 2, terminal 1 is to catv terminal, and terminal 1 is to gateway, and terminal 1 is to WAP (wireless access point) 2, terminal 1 is to holding consultation between the terminal 3 and carrying out, and precondition is that these network entities are in the same subnet.
Fig. 2 is the main flow chart of the machinery of consultation of IP header-compressed of the present invention, comprises the following steps:
1, terminal sends the request of IP header-compressed according to new business parameter and current configuration to WAP (wireless access point); The copy of a complete IP header to be compressed of protection and the source address and the destination address that load on the transmission in the local area network (LAN) that should business in this request;
2, WAP (wireless access point) is according to the mapping of the parameter preassignment IP header-compressed in request numbering, and this mapping numbering is carried out the IP header copy of this terminal traffic and the sign of this Basic Service Set related;
3, WAP (wireless access point) sends the indication of IP header-compressed or transmits the request of IP header-compressed to destination node.Destination node can be another terminal of this Basic Service Set, the WAP (wireless access point) of this Basic Service Set itself, the terminal of same subnet in the wired distributing system, the gateway of same subnet in the wired distributing system, expansion service is concentrated another terminal of same subnet, another WAP (wireless access point) of the same subnet that expansion service is concentrated.If other WAP (wireless access point) of the same subnet that terminal in other BSS of the concentrated same subnet of expansion service or expansion service are concentrated, then the Target Wireless access point distributes new mapping numbering, and new IP header-compressed numbering and relevant parameter are sent to target terminal.
4, destination node will respond and send to former transmission terminal step by step.
In conjunction with Fig. 3, the example of the negotiations process of an IP header-compressed comprises the following steps:
1, when terminal (hereinafter to be referred as source node) upper-layer service need be carried out the request of IP header-compressed, the MAC layer management entity structure IP header-compressed request message of source node, the structure foundation of this message is the parameter of upper-layer service and the configuration of terminal and the residing BSS of terminal (hereinafter to be referred as BSS1).If open the request of IP header-compressed, then this message should be carried source node address information, destination node address information, and the necessary relevant information of IP header-compressed.If close the request of IP header-compressed, then need to carry the IP header-compressed numbering of having distributed in this message.Source node will be constructed the WAP (wireless access point) (hereinafter to be referred as WAP (wireless access point) 1) that good message sends to BSS1, change 2.
2, the request message of WAP (wireless access point) 1 reception sources node, judge then whether WAP (wireless access point) 1 supports the IP header-compressed, if do not support, then directly consult replying of failure to terminal performance IP header-compressed, if support, then WAP (wireless access point) 1 judges that request is to open IP header-compressed request or close the request of IP header-compressed.If open the request of IP header-compressed, change 3, otherwise change 13.
3, WAP (wireless access point) 1 is received a request of opening the IP header-compressed, and then WAP (wireless access point) is preserved the complete parameter in this request message.Then according to the resource operating position of BSS1 and the service parameter preassignment IP header-compressed mapping numbering in the request.WAP (wireless access point) 1 judges according to the content in the message whether the final goal node of this request is oneself, if change 4, otherwise change 5.
4, the destination node of this IP header-compressed request is oneself, and then WAP (wireless access point) 1 is confirmed the preallocated IP header-compressed numbering among the BSS1, sends response message to terminal.Comprise the IP header-compressed numbering of having distributed and having confirmed in the response message.WAP (wireless access point) 1 can be refused the IP header-compressed request of source node, if refuse then distribute to comprise the numbering that an expression is refused in the response message, this consults to finish.
5, the destination node of this IP header-compressed request is not oneself, then WAP (wireless access point) 1 judges that according to the IP address in the request message whether destination node is another terminal in BSS1 or the distributed system, and and source node in same subnet, if, change 6, otherwise change 8.
6, the destination node of this IP header-compressed request is another terminal in BSS1 or the distributed system, and then WAP (wireless access point) is constructed IP header-compressed Indication message, and sends to destination node.Carry original IP header-compressed required parameter and preallocated IP header-compressed numbering in this IP header-compressed Indication message, change 7.
7, after destination node receives the indication of IP header-compressed, preserve relevant parameter and numbering, and construct and consult successful response message, send to WAP (wireless access point) 1 and reply.WAP (wireless access point) 1 returns to source node with response message after receiving and replying, and this consults to finish.
8, the destination node of this IP header-compressed request is not another terminal in BSS1 or the distributed system, and then the negotiation in the BSS1 scope finishes, and WAP (wireless access point) 1 is confirmed the preallocated IP header-compressed numbering among the BSS1, sends response message to terminal, changes 9.
9, WAP (wireless access point) 1 continues to judge, whether destination node is another terminal in the ESS, and and source node in same subnet.If change 10, otherwise change 12.
10, the destination node of this IP header-compressed request is another terminal in the ESS, then WAP (wireless access point) structure IP header-compressed request message.In this request message, carry the information of source node and original parameter, the IP header-compressed number information of having distributed.WAP (wireless access point) 1 sends to this request message the WAP (wireless access point) (hereinafter to be referred as WAP (wireless access point) 2) of the BSS (hereinafter to be referred as BSS2) at destination node place.
11, after WAP (wireless access point) 2 receives this request message, distribute the IP header-compressed numbering in the new BSS2, and structure IP header-compressed Indication message, send to target terminal, its process and 6,7 similar.
12, the destination node of this IP header-compressed request is not another terminal in the ESS, and then WAP (wireless access point) 1 thinks to have only source node can use the IP header-compressed to one section between the WAP (wireless access point) 1 on this professional transmission path, and this consults end.
13, WAP (wireless access point) thinks that this IP header-compressed request is to close the IP header-compressed, then WAP (wireless access point) 1 discharges IP header-compressed numbering, and close the IP header-compressed to the destination node transmission and indicate, close the reciprocal process of IP header-compressed indication and aforesaid step roughly the same, successfully receive response until source node.
Claims (8)
1, the negotiation processing method of IP header-compressed in a kind of WLAN (wireless local area network) is characterized in that, comprises the negotiations process when terminal is opened the IP header-compressed, these negotiations process following steps:
The first step, terminal sends to WAP (wireless access point) according to the parameter of the business that starts the IP header-compressed and opens IP header-compressed request and carry described parameter, and described parameter refers to the IP of the business datum that described terminal is obtained according to the characteristics and the configuring condition of upper-layer service and the relevant information in the upper-layer protocol control head;
Second step, the WAP (wireless access point) that receives the request of described unlatching IP header-compressed is handled the request of described unlatching IP header-compressed according to request content and network configuration, determine target network entity, and send unlatching IP header-compressed indication or transmit the request of described unlatching IP header-compressed to target network entity to target network entity;
The 3rd step received the result that network entity that this unlatchings IP header-compressed indicates is replied the IP header, and the described wireless access described result of naming a person for a particular job returns to terminal.
2, the negotiation processing method of IP header-compressed in the WLAN (wireless local area network) as claimed in claim 1 is characterized in that, also comprise the negotiations process when terminal is closed the IP header-compressed, this negotiations process comprises:
The first step, described terminal send to described WAP (wireless access point) and close the request of IP header-compressed, carry the mapping numbering of having distributed;
Second step, receiving the WAP (wireless access point) of closing the request of IP header-compressed handles this according to request content and network configuration and closes the request of IP header-compressed, determine target network entity, and close the indication of IP header-compressed or transmit the request of the described IP of closing header-compressed to target network entity to the target network entity transmission;
In the 3rd step, the network entity that receives the indication of the described IP of closing header-compressed is replied the result of IP header, and the described wireless access described result of naming a person for a particular job returns to terminal.
3, the negotiation processing method of IP header-compressed in the WLAN (wireless local area network) as claimed in claim 1 or 2 is characterized in that:
Relevant information in the IP of described business datum and the upper-layer protocol control head comprises the complete IP and the control head of upper-layer protocol thereof, and identifies the wherein fixing part and the part of variation.
4, the negotiation processing method of IP header-compressed in the WLAN (wireless local area network) as claimed in claim 1 or 2 is characterized in that:
Described definite target network entity is meant: WAP (wireless access point) is judged the target network entity of these professional data in this subnet according to the relevant information in the IP header-compressed request that receives;
Described network entity can be the terminal in this Basic Service Set, or other main frames in the extended service set distributed system, or WAP (wireless access point), or gateway;
WAP (wireless access point) according to request content and network configuration preassignment should business the mapping numbering of IP header-compressed;
If close the request of IP header-compressed, then numbering is discharged according to the mapping numbering of carrying in the request.
5, the negotiation processing method of IP header-compressed in the WLAN (wireless local area network) as claimed in claim 4 is characterized in that:
The described WAP (wireless access point) that receives the request of described unlatching IP header-compressed is handled the request of described unlatching IP header-compressed according to request content and network configuration, determine target network entity, and to target network entity transmission unlatching IP header-compressed indication or to the request of the described unlatching IP header-compressed of target network entity forwarding, the perhaps described WAP (wireless access point) of closing the request of IP header-compressed of receiving is handled this according to request content and network configuration and is closed the request of IP header-compressed, determine target network entity, and close the IP header-compressed to the target network entity transmission and indicate or transmit in the request of the described IP of closing header-compressed to target network entity
If target network entity is the interior other-end of same Basic Service Set with sending network entity, then sends and open the indication of IP header-compressed or close the indication of IP header-compressed to target network entity;
If target network entity and transmission network entity are the terminals under other interior WAP (wireless access point) of same extended service set, then transmit and open IP header-compressed request or close the request of IP header-compressed;
WAP (wireless access point) is being transmitted the IP header-compressed parameter that need carry preallocated IP header-compressed mapping numbering when opening IP header-compressed request or closing the request of IP header-compressed and send network entity.
6, the negotiation processing method of IP header-compressed in the WLAN (wireless local area network) as claimed in claim 5 is characterized in that:
If open the indication of IP header-compressed, then WAP (wireless access point) sends related content in preallocated IP header-compressed mapping numbering and the request of former IP header-compressed to target network entity, this indication is used for the notification target network entity has a business of having opened the IP header-compressed to send data to, and has distributed IP header-compressed numbering;
If close the indication of IP header-compressed, then WAP (wireless access point) sends related content in preallocated IP header-compressed mapping numbering and the request of former IP header-compressed to target network entity, and this indication is used for the business that this IP header-compressed mapping of notification target network entity numbers will close the IP header compression function.
7, the negotiation processing method of IP header-compressed in the WLAN (wireless local area network) as claimed in claim 4 is characterized in that:
The network entity of the described IP of receiving header-compressed indication is replied IP header result and is meant,
Target network entity is according to the content in preallocated numbering and the indication information, and whether decision accepts the configuration of IP header-compressed;
The WAP (wireless access point) that receives the IP header-compressed request of forwarding distributes the IP header-compressed mapping in the new Basic Service Set to number, and sends the indication of IP header-compressed to the final goal terminal;
Then discharge the mapping numbering if close the indication of IP header-compressed.
8, the negotiation processing method of IP header-compressed in the WLAN (wireless local area network) as claimed in claim 4 is characterized in that:
The result that names a person for a particular job returns to terminal and is meant described wireless access:
If open the indication of IP header-compressed, then WAP (wireless access point) is according to the replying of target network entity, and sends final process result to the terminal of former request IP header-compressed, if the mapping numbering of formal distribution is then carried in success in the result;
If close IP header-compressed indication, then response results represents that the mapping numbering discharges successfully or fails.
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| CN109526030B (en) * | 2017-09-18 | 2021-09-14 | 华为技术有限公司 | Message processing method, device and equipment |
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