CN100448206C - Multi-rate transmission method of radio local network - Google Patents
Multi-rate transmission method of radio local network Download PDFInfo
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- CN100448206C CN100448206C CNB031346308A CN03134630A CN100448206C CN 100448206 C CN100448206 C CN 100448206C CN B031346308 A CNB031346308 A CN B031346308A CN 03134630 A CN03134630 A CN 03134630A CN 100448206 C CN100448206 C CN 100448206C
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Abstract
The present invention relates to a multi-rate transmission method of a wireless local network, which comprises: speed rate information exchange; splitting the speed rate into multiple grades; the first transmitting frame and a request transmitting frame adopts a basic rate in the data transmission; determining a node transmitting rate and an opposite end determined frame rate; a transmitting node sets the reserved time length according to the information rate of the current transmitting frame, the transmitting rate of a receiving end confirming frame, and the lower limit of the transmitting rate of a next frame and opposite end return determined frame; finally, the computation and the refreshment of the network distribution vectors. The present invention solves the technical problem that the background art is not adaptable to a wireless channel, particularly a wireless rapid transmitting channel, an asymmetric channel and an unconnected network. The present invention is suitable for not only a wireless mobile channel, but also a rapid transmitting wireless fading channel, and operates in a symmetrical channel and an asymmetric channel; thus, the multiple speed rate transmission of unconnected network can be realized.
Description
Technical field
The present invention relates to a kind of many speed rates of WLAN (wireless local area network) method.
Background technology
WLAN (wireless local area network) is normally based on carrier sense multiple agreement CSMA's, its improved procedure has: channel division reservation multiple access inserts SRMA (split-channel reservation multiple access), conflict avoids multiple access access protocol MACA (multiple access with collision avoidance), improved conflict to avoid multiple access access protocol MACAW, bottom to obtain agreements such as multiple access access protocol FAMA (floor acquisition multiple acess) and 802.11, and the WLAN (wireless local area network) of indication of the present invention generally all is based on the CSMA agreement.In WLAN (wireless local area network), carry out many speed rates and need solve two subject matters: channel quality estimation and rate selection.Channel quality estimation mainly is to estimate the transmission quality of weighing channel with the statistics of signal to noise ratio, signal strength signal intensity, bit error rate, error sign ratio or frame error rate as judgement, and implementation method is more at present, and ripe.
In WLAN (wireless local area network), existing rate selection method mainly contains two kinds at present: a kind of is " automatic rate strain (Auto Rate Fallback) agreement ", and another kind is " based on automatic rate (the Receiver BasedAuto Rate) agreement of receiver ".Automatic rate strain agreement is proposed by people such as Ai Di. Ka Moman, and its core concept is, serves as according to adjusting transmission rate with the success and the frequency of failure of transmitting previously.This is actual to be that a kind of speed according to frame error rate is adjusted system, after successfully transmitting certain number of times between node, thinks that channel quality reliably and then step by step improves transmission rate; Otherwise, if bust this between node thinks that then channel quality descends and reduces transmission rate step by step.Transmission rate according to each frame in the same transmission course of this agreement is constant, and therefore many speed rates can not cause the variation of reservation duration, and are when channel variation is slow between node, comparatively suitable.But be not suitable for wireless mobile channel environment, because in wireless mobile channel, the variation of channel quality is very fast, the correlation time of channel is short, transfer of data with success for several times or failure is oversize as the channel quality timing statistics window time at interval, thereby make that the channel quality statistics is unreliable, the transmission throughput descends.Based on the automatic rate agreement of receiver by the lid literary composition. Dutch moral, the court of a feudal ruler how. Wei Deya and handkerchief are such fertile. Ba Er proposes, and this agreement has overcome the shortcoming that automatic rate strain agreement can not adapt to wireless mobile channel.Its core concept is to insert the transmission rate and the frame length of this frame in the reservation duration subdomain of mac frame head.Transmit when initial, transmission request that is used to insert and transmission acknowledgement frame all adopt basic rate, sending node and receiving node will be according to received signal estimated channel quality information subsequently, and adjust transmission rate adaptively thereupon, sending node and receiving node then go out data transfer rates and frame length according to received signal, immediate updating and correction NAV.Owing to be to be channel quality timing statistics window,, be applicable to wireless mobile channel so this agreement rate variation is real-time with a frame transmission interval in the transmission course.The topmost shortcoming of this agreement is that its hypothesis channel is a symmetric channel, and node can not pre-determine the transmission rate when sending next frame, therefore is not suitable for nonsymmetric channel and high-speed mobile channel.This agreement hypothesis channel is a symmetric channel, it is the channel quality parameter of forward channel that communication node is used as the estimated parameter of backward channel, and the forward channel quality of nonsymmetric channel and reverse channel quality are different, therefore this agreement is not suitable for nonsymmetric channel, and in the reality, indoor and city wireless channel is nonsymmetric channel often.In addition, also there is the small scale decline in wireless channel simultaneously except the large scale decline is arranged, when the node high-speed mobile, the channel condition information of physical channel changes very fast, for communication reliably, transmission frame length is had certain limitation, and long mac frame often will be divided into a plurality of segment transmission.If there is concealed nodes, speed is higher when preengaging, and actual transfer rate is when low, these concealed nodes may be thought channel idle and disturb ongoing communication, such problem is for the automatic rate agreement based on receiver, in the single hop transmission, do not exist, but in the multistage transmission, but can't avoid.Therefore this agreement is not suitable for nonsymmetric channel and high-speed mobile channel.
Except above speed rates agreement more than two kinds, also have a kind of many speed rates of double-channel time slot A LOHA agreement in the WLAN (wireless local area network), this agreement adopts control channel independently to be used for the setting of transmission rate, because the busy channel resource is too much, seldom uses in the historical facts or anecdotes border.
And in non-full-mesh network, ongoing data frame transfer communication event number may more than one, in traditional many speed rates, the calculating of network allocation vector and more new method can only not be suitable for non-full-mesh network at a communication event.
Summary of the invention
The invention solves background technology and do not fit into wireless channel, especially do not fit into the technical problem of wireless high-speed mobile channel, nonsymmetric channel and unconnected network.
Technical solution of the present invention is:
A kind of many speed rates of WLAN (wireless local area network) method, its special character is: this method comprises
1). the rate information exchange
(1). transmission rate information: the transmission rate of transmitting current transmit frame speed and receiving terminal acknowledgement frame;
(2). the rate variation mode:
1]. speed is divided into a plurality of grades; In the data frame transfer, node is according to current transmit frame rate sending data, first transmit frame in the transfer of data, and the transmission rate of its current transmit frame speed and receiving terminal acknowledgement frame all adopts basic rate;
2]. judge whether to adopt the request transmit frame and allow transmit frame, be, then ask the current transmit frame speed of transmit frame and the transmission rate of receiving terminal acknowledgement frame all to adopt basic rate, the current transmit frame speed of request transmit frame and the transmission rate of the permission transmit frame that receiving terminal returns adopt basic rate, the transmission rate of first data sementation and acknowledgement frame is according to channel quality saltus step or constant, and all the other frame rate change step by step or be constant; Not, then the current transmit frame speed of first data sementation and the transmission rate of receiving terminal acknowledgement frame all adopt basic rate, the transmission rate of first data sementation and acknowledgement frame adopts basic rate, the transmission rate of second data segmentation and acknowledgement frame is according to channel quality saltus step or constant, and all the other frame rate change step by step or be constant;
(3). determining of node transmission rate and opposite end acknowledgement frame speed: the node transmission rate is determined according to the transmission rate of the receiving terminal acknowledgement frame of current received frame, and this value is inserted current transmit frame rate domain notice opposite end; Opposite end acknowledgement frame speed is estimated channel according to current reception, with the transmission rate comparison of current received frame, calculates the current transmission rate of wanting the acknowledgement frame of transmit frame of opposite end response, and this value is inserted the transmission rate field notice opposite end of receiving terminal acknowledgement frame;
2). the setting of reservation duration
Sending node is provided with the reservation duration according to the information rate of current transmit frame, the transmission rate of receiving terminal acknowledgement frame and the next frame of local transmission and the lower limit of the transmission rate that acknowledgement frame is returned in the opposite end;
3). the calculating of network allocation vector and renewal
In the full-mesh network, the adjacent node of transmitting-receiving node calculates according to the reservation duration territory of receiving frame and the renewal network allocation vector; In non-full-mesh network, the adjacent node of transmitting-receiving node is according to receiving that the transmitting-receiving address of frame sets up communications event list, and renewal and computing network allocation vector.
Above-mentioned transmission rate information can utilize physics frame head or medium access control layer frame control domain to transmit the transmission rate of current transmit frame speed and receiving terminal acknowledgement frame.
Above-mentioned data frame transfer can comprise the request transmit frame, allow the transmission of transmit frame, data sementation and acknowledgement frame.
Above-mentioned data frame transfer can comprise data sementation and acknowledgement frame.
The above-mentioned variation step by step should be adopted frame by frame by the speed incremental classification or is decremented to suitable.
The above-mentioned communications event list of setting up specifically can be: the adjacent node of transmitting-receiving node is numbered the data frame transfer process that listens to according to the transmitting-receiving address of receiving frame, the corresponding reservation of record duration.
The situation of above-mentioned renewal and computing network allocation vector can comprise:
1). listen to channel busy, can comprise the data frame transfer of new generation and begun but uncompleted data frame transfer;
2). detect the data frame transfer access and whether fail;
3). detect whether accidental interruption of data frame transfer.
Above-mentioned channel quality can be determined according to the statistics of signal to noise ratio, signal strength signal intensity, bit error rate, error sign ratio or frame error rate.
The present invention has following advantage:
1. the present invention is in data transmission procedure, and the rate of information throughput can change according to physical frame segmented adaptive ground according to channel status; Sending node can send data according to the permission receiving velocity of receiving node.The switching method of the rate information that the while proposes according to the present invention, sending node not only knows the information rate of current transmit frame, also know the transmission rate of the acknowledgement frame that the opposite end is returned simultaneously, and can estimate the lower limit of the transmission rate that acknowledgement frame is returned in local next frame that sends and opposite end exactly.So the present invention is not only applicable to wireless mobile channel, more is applicable to the high-speed mobile wireless fading channel.
2. the present invention has adopted the switching technology of rate information, and the exchange of the exchange of rate information and channel quality information is of equal value, so the present invention not only can work in symmetric channel and also can work in nonsymmetric channel.
3. the present invention is aided with the method for setting up communications event list by many speed rates of the method realization full-mesh network of the network allocation vector that upgrades in time, can also realize many speed rates of non-full-mesh network.
Embodiment
Specific implementation method of the present invention is
1. rate information exchange
The present invention is divided into V with speed
1～V
pIndividual grade, grade two-forty more are fast more, V
1Speed is minimum, is basic rate, V
pSpeed is the highest, is flank speed.
1). transmission rate information: we set up the transmission rate territory of current transmit frame rate domain and receiving terminal acknowledgement frame in physics frame head or key-course frame control domain, are used for transmitting the value of the transmission rate of current transmit frame speed and receiving terminal acknowledgement frame respectively.
2). the rate variation mode: according to the present invention, we are divided into V with speed
1～V
pIndividual grade, grade two-forty more are fast more, V
1Speed is minimum, and we are referred to as basic rate, V
pSpeed is the highest, and we are referred to as flank speed.When data frame transfer, carrier sense multiple agreement with collision detection is an example, request transmit frame, permission transmit frame adopt basic rate, and the transmission rate of first data sementation and acknowledgement frame can be according to the channel quality saltus step, and other frame rate thereafter can only change by channel quality step by step.What is called changes promptly frame by frame step by step, and transmission rate increases, subtracts by the speed classification or be constant.Channel quality then can be determined according to the statistics of signal to noise ratio, signal strength signal intensity, bit error rate, error sign ratio or frame error rate.Need to prove that the data sementation in the data frame transfer had only one when long or channel quality was fine when Frame.
3). according to the present invention, first transmit frame in the transfer of data, the transmission rate resp_fRATE of its current transmit frame speed fRATE and receiving terminal acknowledgement frame all adopts basic rate;
4). determining of node transmission rate and opposite end acknowledgement frame speed: first transmit frame during divisor is reportedly defeated, the transmission rate resp_fRATE of its current transmit frame speed fRATE and receiving terminal acknowledgement frame all adopts outside the basic rate, the transmission rate of the receiving terminal acknowledgement frame in the acknowledgement frame that sending node returns according to current receiving terminal is determined the transmission rate of oneself, and this value is inserted current transmit frame rate domain notify the opposite end, according to current reception channel is estimated simultaneously, compare with the transmission rate of current received frame, calculate the current transmission rate of wanting the acknowledgement frame of transmit frame of opposite end response, this value is inserted the transmission rate field notice opposite end of receiving terminal acknowledgement frame.
2. reservation duration setting
Sending node is provided with the reservation duration according to the information rate of current transmit frame, the transmission rate of acknowledgement frame and the next frame of local transmission and the lower limit of the transmission rate that acknowledgement frame is returned in the opposite end.Can therefore not bump with assurance.
3. the calculating of network allocation vector and renewal
When network was the full-mesh network, the adjacent node of transmitting-receiving node calculated according to the reservation duration territory of receiving frame and the renewal network allocation vector.Because in the full-mesh network, the transmitting-receiving node that is in communications status only has a pair of.
And when network was the full-mesh network, the adjacent node of transmitting-receiving node according to setting up communications event list in the transmitting-receiving address of receiving frame, was numbered the data frame transfer process that listens to, the corresponding reservation of record duration.And upgrade and calculating NAV, this comprises the processing to following several situations:
1). listen to burst communication and arrive, this comprises the burst communication of new generation and has begun but uncompleted burst communication.
2). detect the burst transfer reservation and whether fail.
3). detect whether accidental interruption of burst transfer.
Like this, can the phase mutual interference in the time of can guaranteeing on the one hand that portable terminal is communicated by letter in pairs, eliminate and preengage the negative effect of duration sometimes greater than the actual transmissions duration, can improve the operating efficiency of the whole network on the other hand.
Claims (6)
1. many speed rates of WLAN (wireless local area network) method, it is characterized in that: this method comprises
1). the rate information exchange:
(1). transmission rate information: transmission rate information is to utilize physics frame head or medium access control layer frame control domain to transmit the transmission rate of current transmit frame speed and receiving terminal acknowledgement frame.
(2). the rate variation mode:
1]. speed is divided into a plurality of grades; In the data frame transfer, node is according to current transmit frame rate sending data, first transmit frame in the transfer of data, and the transmission rate of its current transmit frame speed and receiving terminal acknowledgement frame all adopts basic rate;
2]. judge whether to adopt the request transmit frame and allow transmit frame, be, then ask the current transmit frame speed of transmit frame and the transmission rate of receiving terminal acknowledgement frame all to adopt basic rate, the current transmit frame speed of request transmit frame and the transmission rate of the permission transmit frame that receiving terminal returns adopt basic rate, the transmission rate of first data sementation and acknowledgement frame is according to channel quality saltus step or constant, and all the other frame rate change step by step or be constant; Not, then the current transmit frame speed of first data sementation and the transmission rate of receiving terminal acknowledgement frame all adopt basic rate, the transmission rate of first data sementation and acknowledgement frame adopts basic rate, the transmission rate of second data segmentation and acknowledgement frame is according to channel quality saltus step or constant, and all the other frame rate change step by step or be constant;
(3). determining of node transmission rate and opposite end acknowledgement frame speed: the node transmission rate is determined according to the transmission rate of the receiving terminal acknowledgement frame of current received frame, and this value is inserted current transmit frame rate domain notice opposite end; Opposite end acknowledgement frame speed is estimated channel according to current reception, with the transmission rate comparison of current received frame, calculates the current transmission rate of wanting the acknowledgement frame of transmit frame of opposite end response, and this value is inserted the transmission rate field notice opposite end of receiving terminal acknowledgement frame;
2). the setting of reservation duration:
Sending node is provided with the reservation duration according to the information rate of current transmit frame, the transmission rate of receiving terminal acknowledgement frame and the next frame of local transmission and the lower limit of the transmission rate that acknowledgement frame is returned in the opposite end;
3). the calculating of network allocation vector and renewal:
In the full-mesh network, the adjacent node of transmitting-receiving node calculates according to the reservation duration territory of receiving frame and the renewal network allocation vector; In non-full-mesh network, the adjacent node of transmitting-receiving node is according to receiving that the transmitting-receiving address of frame sets up communications event list, and renewal and computing network allocation vector.
2. many speed rates of WLAN (wireless local area network) method according to claim 1 is characterized in that: described data frame transfer comprises the request transmit frame, allows the transmission of transmit frame, data sementation and acknowledgement frame.
3. many speed rates of WLAN (wireless local area network) method according to claim 1 and 2 is characterized in that: the described variation step by step is frame by frame by the speed incremental classification or successively decrease.
4. many speed rates of WLAN (wireless local area network) method according to claim 3, it is characterized in that: the described communications event list of setting up is: the adjacent node of transmitting-receiving node is according to the transmitting-receiving address of receiving frame, the data frame transfer process that listens to is numbered the corresponding reservation of record duration.
5. many speed rates of WLAN (wireless local area network) method according to claim 4 is characterized in that: the situation of described renewal and computing network allocation vector comprises:
1). listen to channel busy, this comprises the data frame transfer of new generation and has begun but uncompleted data frame transfer;
2). detect the data frame transfer access and whether fail;
3). detect whether accidental interruption of data frame transfer.
6. many speed rates of WLAN (wireless local area network) method according to claim 5, it is characterized in that: described channel quality is determined according to the statistics of signal to noise ratio, signal strength signal intensity, bit error rate, error sign ratio or frame error rate.
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| CNB031346308A CN100448206C (en) | 2003-09-18 | 2003-09-18 | Multi-rate transmission method of radio local network |
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| CNB031346308A CN100448206C (en) | 2003-09-18 | 2003-09-18 | Multi-rate transmission method of radio local network |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4364165B2 (en) * | 2005-06-17 | 2009-11-11 | 株式会社東芝 | Wireless communication device |
| CN1996908B (en) * | 2005-12-31 | 2010-05-05 | 中兴通讯股份有限公司 | Method for ending time update and its state detection of occupied channels in the wireless LAN |
| CN101364944B (en) * | 2008-09-05 | 2010-12-29 | 西安电子科技大学 | Cooperative media access control method for wireless distributed network |
| CN101808418B (en) * | 2009-09-25 | 2012-07-25 | 南京邮电大学 | Distributed processing method for introducing non-competitive transmission cycle in network |
| CN101714896B (en) * | 2009-09-29 | 2016-11-02 | 北京新岸线移动多媒体技术有限公司 | Communication means |
| CN102801690B (en) * | 2011-05-25 | 2015-09-30 | 华为技术有限公司 | The processing method of Streaming Media, Distributor, client and system |
| CN103228056B (en) | 2013-04-24 | 2019-03-01 | 中兴通讯股份有限公司 | A kind for the treatment of method and apparatus of channel access |
| CN105960762B (en) * | 2014-10-31 | 2019-04-26 | 华为技术有限公司 | The data transmission method and relevant device and passive optical network of passive optical network |
| CN106656371A (en) * | 2016-12-29 | 2017-05-10 | 中国科学院微电子研究所 | Wireless rate selection method based on receiving end signal-to-noise ratio prediction and wireless network |
| CN110611939B (en) * | 2019-08-20 | 2023-09-26 | 贵州电网有限责任公司 | Intelligent transmission method for monitoring data of power distribution network based on mesh structure |
| CN111278033B (en) * | 2020-01-21 | 2022-10-18 | 北京工业大学 | Method for intelligent scanning and dynamic optimal configuration of transmission rate of LoRa communication network |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01117536A (en) * | 1987-10-30 | 1989-05-10 | Nec Corp | Method and apparatus for multi-rate frame transmission |
| CN1319293A (en) * | 1998-09-22 | 2001-10-24 | 西门子公司 | Method and device for estimating transmission quality of digital communication signal |
| WO2002005578A1 (en) * | 2000-07-12 | 2002-01-17 | Symbol Technologies, Inc. | Method and apparatus for variable power control in wireless communications systems |
| WO2003003657A1 (en) * | 2001-06-29 | 2003-01-09 | Koninklijke Philips Electronics N.V. | Signal to noise margin information for power control and bit rate adaptation in ieee 802.11h wlan |
-
2003
- 2003-09-18 CN CNB031346308A patent/CN100448206C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01117536A (en) * | 1987-10-30 | 1989-05-10 | Nec Corp | Method and apparatus for multi-rate frame transmission |
| CN1319293A (en) * | 1998-09-22 | 2001-10-24 | 西门子公司 | Method and device for estimating transmission quality of digital communication signal |
| WO2002005578A1 (en) * | 2000-07-12 | 2002-01-17 | Symbol Technologies, Inc. | Method and apparatus for variable power control in wireless communications systems |
| WO2003003657A1 (en) * | 2001-06-29 | 2003-01-09 | Koninklijke Philips Electronics N.V. | Signal to noise margin information for power control and bit rate adaptation in ieee 802.11h wlan |
Non-Patent Citations (4)
| Title |
|---|
| A Rate-Adaptive MAC Protocol for Multi-HopWireless Networks. Gavin Holland,Nitin Vaidya,Paramvir Bahl.Proceedings of ACM MOBICOM'01. 2001 |
| A Rate-Adaptive MAC Protocol for Multi-HopWireless Networks. Gavin Holland,Nitin Vaidya,Paramvir Bahl.Proceedings of ACM MOBICOM'01. 2001 * |
| WaveLAN -II: A High-Performance Wireless LAN for the Unlicensed Band. Ad Kamerman, Leo Monteban.Bell Labs Technical Journal,Vol.2 No.3. 1997 |
| WaveLAN -II: A High-Performance Wireless LAN for the Unlicensed Band. Ad Kamerman, Leo Monteban.Bell Labs Technical Journal,Vol.2 No.3. 1997 * |
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