CN103313367A - Uplink multi-user method applicable to wireless local area network - Google Patents
Uplink multi-user method applicable to wireless local area network Download PDFInfo
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- CN103313367A CN103313367A CN2013102859528A CN201310285952A CN103313367A CN 103313367 A CN103313367 A CN 103313367A CN 2013102859528 A CN2013102859528 A CN 2013102859528A CN 201310285952 A CN201310285952 A CN 201310285952A CN 103313367 A CN103313367 A CN 103313367A
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Abstract
The invention discloses an uplink multi-user method applicable to the wireless local area network. The method includes a station requiring transmission of uplink data transmits a resource request frame to an access station by competition; the access station judges whether a user group available for uplink multi-user transmission exists or not according to the resource request frame transmitted by the request station; if yes, the access station distributes same uplink transmission resources for users in the user group in a control channel; if not, the access station normally distributes the uplink transmission resources to the request station; the request station transmits the uplink data according to the distribution of the uplink resources in the control channel. The method has the advantage that system throughput is effectively increased by simultaneous uplink transition of data through multiple stations.
Description
Technical field
The present invention relates to the WLAN (wireless local area network) field, relate in particular to a kind of uplink multi-users transmission method that is applicable to WLAN (wireless local area network).
Background technology
In the WLAN, the base station access website (CAP, access point) that is otherwise known as.Used Single User MIMO technology and descending multi-user MIMO technology in the existing protocol of wireless local area network, and because the development uplink multi-users MIMO technology of many packet inspection technicals has also received more concern.The uplink multi-users mimo system is a virtual mimo system, as shown in Figure 1, each terminal sends one or more data flow at identical running time-frequency resource, receiver can be regarded these data flow from different terminals as the different data streams from same terminal, thereby consists of a virtual mimo system.The uplink multi-users technology has been applied in LTE-Advanced and the IEEE802.16e system, will also be following trend in its application and the WLAN (wireless local area network) therefore.
Simultaneously, in the uplink multi-users system, a plurality of users' that the required power controlling mechanism is transmitted simultaneously with balance transmitting channel arrives the intensity at AP place.If there is not power control mechanism, when sending the constant power signal, distance A P is near or do not have the STA of obstacle owing to experiencing different paths or reverberation etc., away from AP or to have the STA of obstacle to arrive the power of AP much larger, and unbalanced power will bring impact to receiving algorithm than those.
Supported Single User MIMO technology and descending multi-user MIMO technology in the existing protocol of wireless local area network system, and uplink multi-users MIMO technology can further increase the throughput of wireless local area network (WLAN) system.The present invention is mainly for the implementation method of uplink multi-users transmission in the WLAN (wireless local area network).
Summary of the invention
In WLAN (wireless local area network), used the entire throughput that Single User MIMO and descending multi-user MIMO improve system.Up, also can further improve up throughput by using uplink multi-users MIMO.The present invention proposes a kind of uplink multi-users transmission method that is applicable to WLAN (wireless local area network).
The present invention adopts following technical scheme for solving above technical problem: a kind of uplink multi-users transmission method that is applicable to WLAN (wireless local area network) may further comprise the steps:
Step 3, if there is this user's group, described access website then is the identical uplink transmission resource of user assignment in this user's group in control channel; Otherwise described access website is the described website normal allocation uplink transmission resource that needs to send upstream data;
Beneficial effect of the present invention is as follows: the present invention has realized the transmission method of uplink multi-users in the WLAN (wireless local area network), realizes that by the small change to existing system several users send upstream data simultaneously, and then effectively improves throughput of system.
Description of drawings
Fig. 1 is the schematic diagram of uplink multi-users MIMO of the present invention;
Fig. 2 is the method flow diagram of the embodiment of the invention;
Fig. 3 is the frame structure schematic diagram of the existing random access request frame of the present invention;
Fig. 4 is the frame structure schematic diagram of the existing accidental access response frame of the present invention;
Fig. 5 is the frame structure schematic diagram of the improved resource request frame of the embodiment of the invention.
Embodiment
Below in conjunction with specific embodiment, further illustrate the present invention, should understand these embodiment only is used for explanation the present invention and is not used in and limits the scope of the invention, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present invention.
As shown in Figure 2, a kind of uplink multi-users transmission method that is applicable to WLAN (wireless local area network) may further comprise the steps:
Step 3, if there is this user's group, described access website then is the identical uplink transmission resource of user assignment in this user's group in control channel CCH; Otherwise described access website is the described website normal allocation uplink transmission resource that needs to send upstream data;
In step 3, utilize unicast schedule signaling field in the control channel, arrange and carry out specially the dispatch that the uplink multi-users resource is distributed, and stipulate that each user's uplink can only use a code word.Concrete field distribution is as shown in table 1.In the table 1, utilize reserved value b1=1 in the unicast schedule signaling, therefore make up b
0b
1=01 expression is carried out the uplink multi-users resource and is distributed.
b
2b
3B
23Be the uplink transmission resource of the user assignment that carries out multi-user transmission, and identical value be set for this uplink user all users in organizing.
b
24b
25B
30, b
31b
32Be respectively MCS and coded system that the user sends, for each user this parameter be set by CAP.
b
33b
34b
35For being the initial index value of the spatial flow of certain user assignment in this uplink multi-users transmission group.
b
39b
40B
43Be the index of demodulation pilot frequency pattern, the position of its demodulation pilot frequency is set in order to indicating user.
b
44b
45B
51Be the power control field, adopt open loop or close-loop power control in order to indication.
Table 1 uplink multi-users dispatch Field Definition
By above-mentioned steps, under WLAN (wireless local area network) EUHT system, just can realize the uplink multi-users transmission by less modification, thereby further improve the throughput of system.The below illustrates respectively the specific embodiments of uplink channel estimation and power control according to dispatch.
1) uplink channel estimation
The user need to insert demodulation pilot frequency so that receiving terminal carries out channel estimating with demodulating data before data before carrying out the uplink multi-users transmission.Therefore here up multi-user can be regarded as a virtual Single User MIMO, thereby utilize the inserted mode of demodulation pilot frequency when multithread sends in the existing protocol just can realize that the pilots insertion of uplink finishes uplink channel estimation.
Each user is according to b in the dispatch
39b
40B
43Fluxion N when the index value of demodulation pilot frequency pattern of indication obtains this uplink multi-users transmission total empty
Sts, pilot period DPI
FWith number of pilot symbols DP
Num, according to b
33b
34b
35And b
24b
25B
30The index value of stream when obtaining empty that this user is assigned with, thus utilize the computing formula of demodulation pilot frequency subcarrier set just can obtain the position that each user's demodulation pilot frequency inserts.
2) power control
In the uplink multi-users system, a plurality of users' that the required power controlling mechanism is transmitted simultaneously with balance transmitting channel arrives the intensity at AP place.If there is not power control mechanism, when sending the constant power signal, distance A P is near or do not have the STA of obstacle owing to experiencing different paths or reverberation etc., away from AP or to have the STA of obstacle to arrive the power of AP much larger, and unbalanced power will bring impact to receiving algorithm than those.
The flow process that can be found out the power Control loop power control among the existing WLAN (wireless local area network) EUHT of association by the random access frame structure of Fig. 3 and Fig. 4 is:
Step 1: STA carries this transmitted power and dump power surplus in the random access request frame.Information thus, access point can obtain STA to the estimated value of the uplink transmission path loss of access point and the maximum transmit power of STA.
Step 2: access point carries power adjustment with the transmitted power of closed-loop control STA according to the quality of received frame in accidental access response.
Open Loop Power control flow process among the existing EUHT: the transmitted power of in the BCF frame, carrying CAP, website is according to this value and utilize the reciprocity of up-downgoing can estimate the estimated value of uplink transmission path, and according to the MCS value that configures among the CCH, can open loop control its transmitted power and be
P
STA=min{P
STA_MAX,PL
OL+C/N+10log
10(BW)}(dBm)
\*MERGEFORMAT(1)
Wherein, PL
OLEstimated value for the uplink transmission path loss; C/N is carrier-to-noise ratios corresponding to different MCS; BW is the transmission bandwidth that CAP distributes to STA.
Power control in the existing EUHT agreement all is slow power control, thinks that namely the channel variation of website is slow.Only in the flow process of access, control in the close-loop power control, but As time goes on subscriber channel sends when changing, and need in time carry out the adjustment of power; In the open loop control, owing to being subject to the impact that shadow fading or STA move, not accurate enough thereby the uplink transmission path that STA estimates by the transmission merit power that carries among the BCF is lost in the power control that causes open loop of can changing when sending upstream data.And in uplink multi-users when transmission, is higher to the requirement of real-time of power control, the requirement in the time of therefore need to making amendment to satisfy the uplink multi-users transmission to existing power control mode.
In the present invention, improved power is controlled according to following steps:
Step 1: STA carries the transmitted power of website in the resource request frame, as shown in Figure 5, STA can be determined whether carrying transmitted power in the resource request frame by channel variance situation, with a reserved bit in the frame control as " indication of STA transmit power domain " bit to indicate whether to carry the transmitted power field.
Step 2: CAP adopts open loop or close-loop power control, and CAP is obtained the maximum transmit power of STA by the access request frame.If STA does not carry transmitted power in the resource request frame, then CAP estimates the up path loss by the access request frame.Otherwise, estimate the up path loss by the resource request frame.CAP is STA grouping and selection MCS according to the up path loss of above-mentioned STA maximum transmit power and estimation.CAP utilizes bit b in uplink multi-users group scheduling signaling
44b
45B
51Which kind of power control indication adopts, and when this bit value=0, open Loop Power control is adopted in expression, and STA sets transmitted power according to formula, when generally being used for access point and being one group of user identical MCS being set; Otherwise the transmission power value that employing close-loop power control, the value representation CAP in this territory are STA to be arranged is when generally being used for the access point MCS different for the user arranges.
The above only is preferred implementation of the present invention; be noted that for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make the some improvements and modifications that can expect, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. uplink multi-users transmission method that is applicable to WLAN (wireless local area network) may further comprise the steps:
Step 1, the website that needs to send upstream data send the resource request frame by competition to access website;
Step 2, described access website adjudicate whether there is the user's group that can carry out the uplink multi-users transmission according to described resource request frame;
If there is this user's group in step 3, described access website then is the identical uplink transmission resource of user assignment in this user's group in control channel; Otherwise described access website is the described website normal allocation uplink transmission resource that needs to send upstream data;
Step 4, the described website that need to send upstream data are distributed according to the ascending resource in the described control channel and are carried out upstream data and send.
2. the uplink multi-users transmission method that is applicable to WLAN (wireless local area network) according to claim 1, it is characterized in that, for described user's group arranges special unicast schedule signaling, wherein said unicast schedule signaling comprises the resource location that the user is assigned with in control channel, fluxion when the modulation coding mode MCS that the user is set up and user and line space, the channel coding method that the user adopts, the user is assigned with flows initial index when empty, user's time domain demodulation pilot period, user's frequency-domain demodulation pilot tone pattern, the index of user's frequency-domain demodulation pilot tone pattern, and user power control indication field.
3. the uplink multi-users transmission method that is applicable to WLAN (wireless local area network) according to claim 2, it is characterized in that, the position that demodulation pilot frequency inserted when the index that fluxion, user were assigned with when the user can be according to the user in the described unicast schedule signaling and line space flows initial index and user's frequency-domain demodulation pilot tone pattern when empty arranged the uplink multi-users data and sends is so that access point carries out uplink channel estimation.
4. the uplink multi-users transmission method that is applicable to WLAN (wireless local area network) according to claim 1, it is characterized in that, the described website that needs to send upstream data determines whether carrying website transmitted power field by channel variance situation in the resource request frame, this field is used for assisting described access point to estimate that the up path loss is take further for described website selection modulation coding mode MCS, whether described access point basis is that the identical modulation coding mode MCS of described user's set of dispense decides which kind of power control mode of employing, if identical modulation coding mode MCS, then adopt open Loop Power control, if different modulation coding mode MCS then adopts close-loop power control.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105474736A (en) * | 2013-12-02 | 2016-04-06 | 华为技术有限公司 | Data transmission method and apparatus |
| WO2016095161A1 (en) * | 2014-12-18 | 2016-06-23 | 华为技术有限公司 | Method for acquiring station request, access pointand station |
| WO2016172893A1 (en) * | 2015-04-30 | 2016-11-03 | 华为技术有限公司 | Data transmission method and device |
| CN106793152A (en) * | 2017-03-03 | 2017-05-31 | 西安电子科技大学 | A kind of network concurrent competitive channel and referee method based on power distribution |
| CN110881194A (en) * | 2018-09-05 | 2020-03-13 | 广东新岸线计算机系统芯片有限公司 | Communication method and device based on ultra-high throughput wireless system |
| TWI710267B (en) * | 2015-09-10 | 2020-11-11 | 美商內數位專利控股公司 | Multi-user power control methods and procedures |
| CN113260082A (en) * | 2015-10-23 | 2021-08-13 | 交互数字专利控股公司 | Method for concurrent link establishment and downlink data retrieval for efficient WLAN |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080049820A1 (en) * | 2006-08-22 | 2008-02-28 | Nortel Networks Limited | Multi-antenna scheduling system and method |
| CN101472286A (en) * | 2007-12-28 | 2009-07-01 | 阿尔卡特朗讯 | Virtual MIMO system and apparatus thereof |
| US20100135177A1 (en) * | 2007-05-10 | 2010-06-03 | Hao Liu | Method for scheduling uplink transmission in a wireless communication system and relevant devices |
| CN102687415A (en) * | 2009-11-10 | 2012-09-19 | 英特尔公司 | Techniques to control uplink power |
-
2013
- 2013-07-08 CN CN201310285952.8A patent/CN103313367B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080049820A1 (en) * | 2006-08-22 | 2008-02-28 | Nortel Networks Limited | Multi-antenna scheduling system and method |
| US20100135177A1 (en) * | 2007-05-10 | 2010-06-03 | Hao Liu | Method for scheduling uplink transmission in a wireless communication system and relevant devices |
| CN101472286A (en) * | 2007-12-28 | 2009-07-01 | 阿尔卡特朗讯 | Virtual MIMO system and apparatus thereof |
| CN102687415A (en) * | 2009-11-10 | 2012-09-19 | 英特尔公司 | Techniques to control uplink power |
Non-Patent Citations (1)
| Title |
|---|
| 中华人民共和国工业和信息化部: "高频谱利用率和高数据吞吐的无线局域网技术要求第2 部分:增强型超高速无线局域网媒体接入控制层(MAC) 和物理层(PHY)", 《中华人民共和国通信行业标准YD/T 2394.2-2012》 * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105474736A (en) * | 2013-12-02 | 2016-04-06 | 华为技术有限公司 | Data transmission method and apparatus |
| CN105474736B (en) * | 2013-12-02 | 2020-02-14 | 华为技术有限公司 | Method and device for transmitting data |
| US11350435B2 (en) | 2014-12-18 | 2022-05-31 | Huawei Technologies Co., Ltd. | Method for obtaining request of station, access point, and station |
| WO2016095161A1 (en) * | 2014-12-18 | 2016-06-23 | 华为技术有限公司 | Method for acquiring station request, access pointand station |
| US10728917B2 (en) | 2014-12-18 | 2020-07-28 | Huawei Technologies Co., Ltd. | Method for obtaining request of station, access point, and station |
| WO2016172893A1 (en) * | 2015-04-30 | 2016-11-03 | 华为技术有限公司 | Data transmission method and device |
| US11778567B2 (en) | 2015-09-10 | 2023-10-03 | Interdigital Patent Holdings, Inc. | Multi-user power control methods and procedures |
| TWI710267B (en) * | 2015-09-10 | 2020-11-11 | 美商內數位專利控股公司 | Multi-user power control methods and procedures |
| US11122517B2 (en) | 2015-09-10 | 2021-09-14 | Interdigital Patent Holdings, Inc. | Multi-user power control methods and procedures |
| CN113260082B (en) * | 2015-10-23 | 2024-03-22 | 交互数字专利控股公司 | Method for concurrent link establishment and downlink data retrieval for efficient WLAN |
| CN113260082A (en) * | 2015-10-23 | 2021-08-13 | 交互数字专利控股公司 | Method for concurrent link establishment and downlink data retrieval for efficient WLAN |
| CN106793152A (en) * | 2017-03-03 | 2017-05-31 | 西安电子科技大学 | A kind of network concurrent competitive channel and referee method based on power distribution |
| CN106793152B (en) * | 2017-03-03 | 2020-07-03 | 西安电子科技大学 | Network concurrent competition channel based on power distribution and arbitration method |
| CN110881194B (en) * | 2018-09-05 | 2023-09-19 | 广东新岸线科技有限公司 | Communication method and device based on ultra-high throughput wireless system |
| CN110881194A (en) * | 2018-09-05 | 2020-03-13 | 广东新岸线计算机系统芯片有限公司 | Communication method and device based on ultra-high throughput wireless system |
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