CN102404027B - Method and device for achieving space division multiplexing - Google Patents
Method and device for achieving space division multiplexing Download PDFInfo
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- CN102404027B CN102404027B CN201010274369.3A CN201010274369A CN102404027B CN 102404027 B CN102404027 B CN 102404027B CN 201010274369 A CN201010274369 A CN 201010274369A CN 102404027 B CN102404027 B CN 102404027B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
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Abstract
An embodiment of the invention discloses a method and a device for achieving space division multiplexing, which relate to wireless broadband access technology and used for reducing processing complexity. The method comprises the steps of selecting space division multiplexing grouped user terminals according to collected antenna array information, controlling antenna array to form wave beams pointing to the space division multiplexing grouped user terminals, and directionally sending data to space division multiplexing grouped user terminals according to the wave beams. The method and the device for achieving the space division multiplexing are mainly used for wireless fidelity (wifi) networks.
Description
Technical field
The present invention relates to Wireless Broadband MAN, particularly a kind of method and apparatus realizing space division multiplexing.
Background technology
Along with the large scale deployment of wifi network, interference problem between user is more and more serious, the speed of serious reduction link and performance, and wifi network itself is limited to AP (Access Point, access point) transmission range, make AP in region dispose too intensive, add lower deployment cost, also make the performance of wifi network have a greatly reduced quality.
Adopt directional transmissions (beam forming) to increase coverage, effectively avoid unnecessary interference.Because directional transmissions spatially in turn introduces the degree of freedom, therefore SDMA (Spatial DivisionMultiple Access can be realized, space division multiplexing) communication, AP can be communicated with at least 2 users (user that can simultaneously communicate forms a SDMA grouping) on the same channel at synchronization simultaneously, thus greatly promote the throughput of wifi system.
Baseband wave beam shaping can be utilized at present to realize space division multiplexing, first the member of space division multiplexing grouping is selected according to different priority policies, then allow channel preserve within a period of time mourn in silence, obtain the channel condition information (CSI:channel state information) of each group member successively, then according to CSI compute beam forming weights, and corresponding weight is adopted to send and Received signal strength.
Realizing inventor's discovery in process of the present invention, baseband wave beam shaping is utilized to realize space division multiplexing, need known channel state information, and commercial wifi chip common is at present difficult to get channel condition information, therefore need to revise wifi chip, need the wifi chip revised to carry out a series of matrix computations of channel estimating and beam-forming weights in addition, process complexity is high.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus realizing space division multiplexing, can reduce the complexity of process.
The embodiment of the present invention adopts following technical scheme:
Realize a method for space division multiplexing, comprising:
According to the antenna array information of collecting, select the user terminal of space division multiplexing grouping;
Control antenna battle array, forms the wave beam pointing to described space division multiplexing packet user terminal;
According to described wave beam, to the user terminal directive sending data that described space division multiplexing is divided into groups.
Realize an equipment for space division multiplexing, comprise antenna array;
Antenna array information collection unit, for collecting antenna array information;
User selection unit, for according to described antenna array information, selects the user terminal of space division multiplexing grouping;
Antenna array control unit, for controlling described antenna array, forms the wave beam pointing to the space division multiplexing packet user terminal that described user selection unit is selected;
Transmitting-receiving control unit, for the wave beam according to described formation, to the user terminal directive sending data that described space division multiplexing is divided into groups.
From the technical scheme of the embodiment of the present invention, by the user terminal that the antenna array Information Selection space division multiplexing of collecting is divided into groups, and control antenna formation becomes to point to the wave beam of described space division multiplexing packet user terminal, then according to the user terminal directive sending data that described wave beam divides into groups to described space division multiplexing, thus can directly utilize antenna array information to carry out space division multiplexing grouping and beam forming, compared with prior art, because antenna array information is easy to collect, do not need known channel state information, therefore do not need to revise common commercial wifi chip, thus reduce the complexity of process.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described.
The method flow diagram realizing space division multiplexing that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the schematic diagram that the embodiment of the present invention carries out filling each user terminal to transmit data in the forward direction SDMA grouping of process;
The equipment structure chart realizing space division multiplexing that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 realizes the equipment structure chart of space division multiplexing for another kind that the embodiment of the present invention provides;
Fig. 5 is the communication flow diagram realizing the equipment of space division multiplexing of the embodiment of the present invention.
Embodiment
In WLAN (Wireless Local Area Network, WLAN (wireless local area network)) system, the radio frequency beam of antenna array can be utilized to be shaped and to realize space division multiplexing.Owing to directly utilizing antenna array information to carry out space division multiplexing grouping and beam forming, do not need known channel state information, therefore do not need to revise common commercial wifi chip, thus the complexity of process can be reduced.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
The embodiment of the present invention proposes a kind of method realizing space division multiplexing for wlan network, and as shown in Figure 1, the method for space division multiplexing that what the embodiment of the present invention provided realize, mainly comprises in the process of access device AP:
Step 11, according to the antenna array information of collecting, selects the user terminal of space division multiplexing grouping.
Composition SDMA grouping must meet following two conditions simultaneously:
(1) interference between user terminal is smaller; (2) during SDMA communication, throughput has gain.
For condition (1), namely there is N number of (number of 2≤N≤maximum communication opposite end) mutual interference and meet pre-conditioned user terminal, meet:
The received signal strength indicator confirmation signal ACK RSSI (ReceiveSignal Strength Indicator) of user terminal 1 under certain wave beam is very large, and user terminal 2,3 ..., the N ACK RSSI under this wave beam is very little;
The ACK RSSI of user terminal 2 under certain wave beam is very large, and user terminal 1,3 ..., the N ACK RSSI under this wave beam is very little;
The ACK RSSI of user terminal N under certain wave beam is very large, and user terminal 1,2 ..., the N-1 ACK RSSI under this wave beam is very little;
And the directional diagram that the above-mentioned wave beam of user terminal 1,2 ..., N is corresponding is spatially isolated relatively good.The such as main lobe of user terminal 1 in beam pattern and user terminal 2 have together with such as 50% partially overlap at the main lobe of beam pattern, and so these two user terminals are just not suitable for composition SDMA grouping.
In other words, to described N number of user terminal, ACK RSSI during the non-SDMA of arbitrary user terminal under certain wave beam is greater than ACKRSSI during the non-SDMA of other N-1 user terminal under this wave beam, such as, and the 3db beamwidth of this user terminal in beam pattern and the angle overlapped portion of other N-1 user terminal in beam pattern between 3db beamwidth are less than setting threshold, are less than 10 degree.
Above-mentioned overlapped portion can utilize crossover angle to judge.The 3db beamwidth of such as user 1 is from 60 degree to 100 degree, and width is 40 degree; The 3db beamwidth of user 2 is from 70 degree to 90 degree, and width is 20 degree, then the crossover angle between these two users is exactly 20 degree.
For condition (2), be namely the summation whether total speed comparing composition SDMA communication is greater than speed corresponding to optimal beam when non-SDMA communicates, if total speed is comparatively large, then when thinking that SDMA communicates, throughput has gain.
Specifically, pre-conditioned user terminal is met for the N number of mutual interference meeting above-mentioned condition (1), the ACK RSSI corresponding according to different beams during the described non-SDMA of N number of user terminal, the Signal to Interference plus Noise Ratio SINR (Signal to Interference plus Noise Ratio) when the signal to noise ratio snr (Signal to Noise Ratio) when calculating the non-SDMA of each user terminal and SDMA;
According to SNR and SINR and speed corresponding to optimal beam, obtain 1,2 ... respective speed r1 during N number of user terminal SDMA, r2 ... rN;
According to total speed r_sdma=N*min (r1, r2, r3...rN), obtain total speed during described N number of user terminal SDMA;
During speed rN_max under the speed r1_max+...+ user terminal N optimal beam under total speed r_sdma > user terminal 1 optimal beam when described N number of user terminal SDMA, by described N number of user terminal composition SDMA grouping.
What be necessary explanation is, the judgement of SDMA grouping needs according to certain antenna array information, these days, linear array packets of information was drawn together: user terminal non-SDMA (non-SDMA, transmitting terminal adopts the mode of directional transmissions, under the same frequency of synchronization only and a user terminal communication) time ACKRSSI corresponding to different beams, optimal beam during user terminal non-SDMA and speed corresponding to optimal beam.Wherein, wave beam when optimal beam refers to that user rate is optimum.
Owing to starting most without any antenna array historical information, therefore need first non-SDMA and user terminal communication a period of time, collect linear array information these days.In addition, after antenna array and control unit design, the method for being tested by darkroom is also needed to obtain the pattern information of the different switch combination of antenna array, so that the radio frequency beam carrying out SDMA grouping is shaped.
Step 12, control antenna battle array, formed point to described space division multiplexing packet user terminal wave beam.
The antenna array of the embodiment of the present invention is made up of a series of tier with switch, different Transmit-Receive Units has a set of duplexer to be connected with the antenna of antenna array separately, by the break-make of the duplexer of control antenna battle array, the wave beam pointing to SDMA packet user terminal can be formed, reach the object that radio frequency beam is shaped.
It should be noted that, the wave beam adopted each user terminal during now SDMA communication is exactly the wave beam determined in above-mentioned condition (1).Once wave beam is determined, the break-make of the corresponding duplexer of antenna array also just determines.
Step 13, according to described wave beam, to the user terminal directive sending data that described space division multiplexing is divided into groups.
When transmitting terminal sends SDMA data, do not wish other terminal challenge channel, otherwise can collide, have influence on normal SDMA and communicate, therefore need the certain measure of employing to ensure in a period of time that channel is sent out end and take.The embodiment of the present invention is before transmission SDMA packet, channel is allowed to keep mourning in silence within a period of time: first to send DTIM (Delivery Traffic Indication Message, delay transmission indicating information), DTIM comprises a broadcast bit, when being set to 1, all terminals will wait for a broadcast frame; And then send CTS-to-self broadcast frame at once.CTS-to-self frame is a kind of special CTS (Clear To Send the allows to send) frame of WLAN standard protocol definition, and namely the receiving terminal address of CTS frame is identical with the address of CTS transmitting terminal.Be provided with a period of time length in CTS-to-self frame, all terminals receiving this frame during this period of time can not send uplink information, also would not affect normal SDMA and communicate.
In addition, in SDMA grouping, each user terminal is due to the difference of long data packet and speed, transmitting time (transmitting time=data packet length/speed) can be caused different, as shown in Figure 2.The packet of user terminal 2 is also when transmission, and user terminal 1 has just replied ACK frame, and this will produce interference at transmitting terminal.
For avoiding above-mentioned situation to occur, transmitting terminal needs to carry out filling process to sent packet, to make the transmitting time of each packet identical, has the processing method that two kinds are possible:
(1) if each user terminal adopts identical speed in SDMA grouping, ensure that packet is equally long.When long data packet is different, after short packages, fill 0;
(2) if each user terminal adopts different speed in SDMA grouping, ensure that transmitting time is equally long.When data packet length is improper, after packet, fill 0.
Can ensure that after above-mentioned filling process the transmitting time of each user terminal data bag is identical, such transmitting terminal just can send data to the user terminal of SDMA grouping simultaneously, transmitting terminal can be communicated with at least 2 user terminals on the same channel at synchronization simultaneously, thus under the prerequisite not increasing extra frequency resource, coverage and the capacity of wifi system can be promoted.
It should be noted that, when the user terminal divided into groups according to the antenna array Information Selection SDMA collected, multiple SDMA may be obtained divide into groups, at this moment can determine according to the service priority of the speed of space division multiplexing grouping and space division multiplexing grouping the sending order that multiple SDMA divides into groups.Specifically, two kinds of modes are had to determine the sending order that multiple SDMA divides into groups:
A kind of mode is throughput-maximized, take into account QoS: determine according to the speed of SDMA grouping the sending order (such as determining according to the speed order from high to low of SDMA grouping the sending order that SDMA divides into groups) that SDMA divides into groups, and when the speed of SDMA grouping is identical, the service priority (such as from high to low) according to SDMA grouping determines the sending order that SDMA divides into groups;
Another kind of mode can be preferential guaranteed qos, take into account throughput: the service priority (such as from high to low) according to SDMA grouping determines the sending order that SDMA divides into groups, and when the service priority of SDMA grouping is identical, determine according to the speed of SDMA grouping the sending order (such as determining according to the speed order from high to low of SDMA grouping the sending order that SDMA divides into groups) that SDMA divides into groups;
Wherein, the service priority of SDMA grouping is that in being divided into groups by SDMA, the highest service priority of user terminal is determined.
In addition, carrying out in SDMA communication process, be necessary the renewal carrying out SDMA grouping, such as user terminal 1 moves and causes it to be no longer applicable to forming SDMA divide into groups with user terminal 2.Judge that the foundation upgraded is:
After certain SDMA packet communication a period of time, obtain the average packet error rate that this SDMA divides into groups; When the average packet error rate that described SDMA divides into groups is more than or equal to setting threshold value, such as 50%, need the user terminal revising SDMA grouping.
The method obtaining the average packet error rate of SDMA grouping is, after each user terminal in SDMA grouping receives the packet of transmitting terminal transmission, short interFrameGap (Short InterFrame Space, SIFS, a time span of 802.11 consensus standards regulations) time reply ACK frame to transmitting terminal, transmitting terminal just can add up the Packet Error Ratio PER (Packet Error Ratio) of each communication terminal according to ACK frame.
In sum, the method of space division multiplexing that what the embodiment of the present invention provided realize, by the user terminal that the antenna array Information Selection SDMA collected divides into groups, and control antenna formation becomes to point to the wave beam of described SDMA packet user terminal, then according to the user terminal directive sending data that described wave beam divides into groups to described SDMA, thus directly can carry out SDMA grouping and beam forming according to antenna array information, compared with prior art, because antenna array information is easy to collect, do not need known channel state information, oneself design is not needed to be applicable to the wifi chip of SDMA grouping, common commercial wifi chip can meet the demands, because this reducing the complexity of process.
The embodiment of the present invention gives a kind of communication apparatus simultaneously, and this equipment performs above-mentioned method, and each step in preceding method can be applied in this equipment.
As shown in Figure 3, the equipment of space division multiplexing that what the embodiment of the present invention provided realize, comprises antenna array 31, Transmit-Receive Unit 35, and
Antenna array information collection unit 32, for collecting antenna array information;
User selection unit 33, for according to described antenna array information, selects the user terminal of space division multiplexing grouping;
Antenna array control unit 34, for controlling described antenna array 31, forms the wave beam pointing to described space division multiplexing packet user terminal;
Transmitting-receiving control unit 36, for the wave beam according to described formation, controls the user terminal directive sending data that described Transmit-Receive Unit 35 divides into groups to described space division multiplexing.
Wherein, described Transmit-Receive Unit 35 at least two, and each Transmit-Receive Unit adopts different duplexers to be connected with same described antenna array 31 separately.Each Transmit-Receive Unit can realize WLAN standard agreement PHY (physical layer) and MAC (Media Access Control, the medium access control) function of standard; The number of Transmit-Receive Unit determines maximum SDMA user terminal number, is the upper limit of user terminal number in SDMA grouping.
The antenna array information that described antenna array information collection unit 32 is collected comprises: the ACK RSSI that different beams during user terminal non-SDMA is corresponding, optimal beam during user terminal non-SDMA and speed corresponding to optimal beam, wherein, wave beam when optimal beam refers to that user rate is optimum.
The user terminal that described user selection unit 33 selects SDMA to divide into groups comprises:
Select N number of user terminal, the Correspondent Node number of wherein 2≤N≤maximum;
The ACK RSSI corresponding according to different beams during described N number of user terminal non-SDMA, obtains total speed during described N number of user terminal SDMA;
When total speed when described N number of user terminal SDMA is greater than the summation of speed corresponding to the optimal beam of each user terminal, by described N number of user terminal composition SDMA grouping.
Antenna array structure as shown in Figure 3, it is made up of a series of tier, different Transmit-Receive Units has a set of duplexer to be connected with the antenna of antenna array separately, antenna array control unit 34 forms by the break-make of control antenna switch the wave beam needed, reach the object that radio frequency beam is shaped, different duplexer combinations forms different beam configuration, corresponding different directional diagrams.
Further, see accompanying drawing 4, the equipment of space division multiplexing that what the embodiment of the present invention provided realize can also comprise:
Grouping selected cell 41, for when selectable space division multiplexing is grouped into multiple, determines the sending order of described multiple SDMA grouping according to the speed of SDMA grouping and the service priority of SDMA grouping.
Specifically, divide into groups selected cell can:
Be further used for determining according to the speed of SDMA grouping the sending order that SDMA divides into groups, (such as determining according to the speed order from high to low of SDMA grouping the sending order that SDMA divides into groups), and when the speed of SDMA grouping is identical, the service priority (such as from high to low) according to SDMA grouping determines the sending order that SDMA divides into groups; Or,
Can also be further used for determining according to the service priority (such as from high to low) of SDMA grouping the sending order that SDMA divides into groups, and when the service priority of SDMA grouping is identical, speed according to SDMA grouping determines the sending order that SDMA divides into groups, (such as determining according to the speed order from high to low of SDMA grouping the sending order that SDMA divides into groups);
Wherein, the service priority of SDMA grouping is determined by the highest service priority of user terminal in group.
Further, still see accompanying drawing 4, the equipment of space division multiplexing that what the embodiment of the present invention provided realize can also comprise:
Updating block 42, for obtaining the average packet error rate of SDMA packet user terminal, and when the average packet error rate of described SDMA packet user terminal is more than or equal to setting threshold value, the user terminal of amendment SDMA grouping.Judge that the foundation upgraded is:
After certain SDMA packet communication a period of time, obtain the average packet error rate that this SDMA divides into groups; When the average packet error rate that described SDMA divides into groups is more than or equal to setting threshold value, such as 50%, revise the user terminal that described SDMA divides into groups.
In addition, because each user terminal in SDMA grouping is due to the difference of long data packet and speed, transmitting time (transmitting time=data packet length/speed) can be caused different, produce interference at transmitting terminal.For avoiding above-mentioned situation to occur, preferably, described transmitting-receiving control unit 36, also for before sending data to the user in described SDMA grouping simultaneously, carries out filling process to make the transmitting time of each packet identical to sent packet.There is the processing method that two kinds are possible:
One is, if each user terminal adopts identical speed in SDMA grouping, ensure that packet is equally long.When long data packet is different, after short packages, fill 0;
Another kind is, if each user terminal adopts different speed in SDMA grouping, ensure that transmitting time is equally long.When data packet length is improper, after packet, fill 0.
Can ensure that after above-mentioned filling process the transmitting time of each user terminal data bag is identical.
The concrete communication process of the equipment of space division multiplexing that realizes of the embodiment of the present invention as shown in Figure 5.Due to equipment start most without any historical information time, the selection of SDMA grouping cannot be carried out, also just cannot SDMA communication, therefore need first non-SDMA to communicate a period of time, internal antenna battle array information collection unit collects the relevant information of antenna array during this period of time; Judge according to antenna array information the user terminal that all possible SDMA divides into groups by grouping selected cell and user selection unit, then select one of them SDMA to divide into groups to communicate according to the criterion of design further; Transmitting-receiving control unit controls Transmit-Receive Unit transmission CTS-to-self broadcast frame and reserves wireless channel; Antenna array control unit becomes to point to the wave beam of the space division multiplexing packet user terminal of described selection according to the antenna array information control antenna formation of collecting; Transmitting-receiving control unit controls multiple Transmit-Receive Unit directive sending data; User terminal replys ACK after receiving data; Antenna array information collection unit collects the antenna array information needed according to ACK, continue the SDMA communication of next round.
Wherein, the antenna array information spinner that antenna array information collection unit is collected will comprise: the beam pattern of the different switch combination of antenna array is (after antenna array and control unit design, the method can tested by darkroom obtains this information), the speed r_max that the ACK RSSI that during non-SDMA communication, different beams is corresponding, optimal beam, optimal beam are corresponding, and average packet error rate PER during SDMA communication.
The equipment realizing space division multiplexing of the embodiment of the present invention, collected and antenna array information during user terminal communication by antenna array information collection unit, and the user terminal divided into groups according to the space division multiplexing of antenna array Information Selection by user selection unit, described antenna array is controlled by antenna array control unit, form the wave beam pointing to the space division multiplexing packet user terminal that described user selection unit is selected, then Transmit-Receive Unit is controlled according to the described wave beam formed by transmitting-receiving control unit, to the user terminal directive sending data that described space division multiplexing is divided into groups, thus directly carry out space division multiplexing grouping and beam forming according to antenna array information, compared with prior art, because antenna array information is easy to collect, do not need known channel state information, oneself design is not needed to be applicable to the wifi chip of space division multiplexing, common commercial wifi chip can meet the demands, because this reducing the complexity of process.
One of ordinary skill in the art will appreciate that, each functional unit in the embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.And all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in a computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Above-mentioned specific embodiment is not in order to limit the present invention; for those skilled in the art; under the premise without departing from the principles of the invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. realize a method for space division multiplexing, it is characterized in that, comprising:
According to the antenna array information of collecting, select the user terminal of space division multiplexing grouping;
Control antenna battle array, forms the wave beam pointing to described space division multiplexing packet user terminal;
According to described wave beam, to the user terminal directive sending data that described space division multiplexing is divided into groups;
Wherein, described control antenna battle array, forms the wave beam pointing to described space division multiplexing packet user terminal and comprises:
By the break-make of the duplexer of control antenna battle array, form the wave beam pointing to described space division multiplexing packet user terminal.
2. method according to claim 1, is characterized in that, the antenna array information of described collection comprises:
The received signal strength indicator confirmation signal ACKRSSI that different beams during the non-space division multiplexing of user terminal is corresponding, optimal beam during the non-space division multiplexing of user terminal and speed corresponding to optimal beam, wherein, wave beam when optimal beam refers to that user rate is optimum.
3. method according to claim 2, is characterized in that, described according to antenna array information, selects the user terminal of space division multiplexing grouping to comprise:
Select N number of user terminal, the Correspondent Node number of wherein 2≤N≤maximum;
The ACK RSSI corresponding according to different beams during the described non-space division multiplexing of N number of user terminal, obtains total speed during described N number of user terminal space division multiplexing;
When total speed when described N number of user terminal space division multiplexing is greater than the summation of speed corresponding to the optimal beam of each user terminal, by described N number of user terminal composition space division multiplexing grouping.
4. method according to claim 3, is characterized in that, the method for the N number of user terminal of described selection comprises:
To described N number of user terminal, ACKRSSI during the non-space division multiplexing of arbitrary user terminal under certain wave beam is greater than ACK RSSI during the non-space division multiplexing of other N-1 user terminal under this wave beam, and the 3db beamwidth of this user terminal in beam pattern and the angle overlapped portion of other N-1 user terminal in beam pattern between 3db beamwidth are less than setting threshold.
5. method according to claim 3, is characterized in that, the described ACK RSSI corresponding according to different beams during the described non-space division multiplexing of N number of user terminal, and total speed when obtaining described N number of user terminal space division multiplexing comprises:
The ACK RSSI corresponding according to different beams during the described non-space division multiplexing of N number of user terminal, Signal to Interference plus Noise Ratio SINR when signal to noise ratio snr when obtaining the non-space division multiplexing of each user terminal and space division multiplexing;
The speed corresponding according to the optimal beam of described SNR and described SINR and described N number of user terminal, obtains respective speed during described N number of user terminal space division multiplexing;
According to respective speed during described N number of user terminal space division multiplexing, obtain total speed during described N number of user terminal space division multiplexing.
6. method according to claim 1, is characterized in that, according to described wave beam, before the user terminal directive sending data that described space division multiplexing is divided into groups, also comprises:
Carry out filling process to make the transmitting time of each packet identical to sent packet.
7., according to the arbitrary described method of claim 1-6, it is characterized in that, described method also comprises:
When the space division multiplexing selected is grouped into multiple, determine the sending order of described multiple space division multiplexing grouping according to the speed of space division multiplexing grouping and the service priority of space division multiplexing grouping.
8. method according to claim 7, is characterized in that, the service priority of the described speed according to space division multiplexing grouping and space division multiplexing grouping determines that the sending order of described multiple space division multiplexing grouping comprises:
According to the sending order of the speed determination space division multiplexing grouping of space division multiplexing grouping, and when the speed of space division multiplexing grouping is identical, according to the sending order of the service priority determination space division multiplexing grouping of space division multiplexing grouping;
Or, according to the sending order of the service priority determination space division multiplexing grouping of space division multiplexing grouping, and when the service priority of space division multiplexing grouping is identical, according to the sending order of the speed determination space division multiplexing grouping of space division multiplexing grouping.
9. method according to claim 7, is characterized in that, described method also comprises:
Obtain the average packet error rate of space division multiplexing packet user terminal;
When the average packet error rate of described space division multiplexing packet user terminal is more than or equal to setting threshold value, the user terminal of amendment space division multiplexing grouping.
10. realize an equipment for space division multiplexing, comprise antenna array and Transmit-Receive Unit, it is characterized in that, also comprise:
Antenna array information collection unit, for collecting antenna array information;
User selection unit, for according to described antenna array information, selects the user terminal of space division multiplexing grouping;
Antenna array control unit, for controlling described antenna array, forms the wave beam pointing to the space division multiplexing packet user terminal that described user selection unit is selected;
Transmitting-receiving control unit, for the wave beam according to described formation, controls the user terminal directive sending data that described Transmit-Receive Unit divides into groups to described space division multiplexing;
Wherein, described equipment comprises at least two Transmit-Receive Units, and each Transmit-Receive Unit adopts different duplexers to be connected with same described antenna array separately.
11. equipment according to claim 10, it is characterized in that, the antenna array information that described antenna array information collection unit is collected comprises: the received signal strength indicator confirmation signal ACK RSSI that different beams during the non-space division multiplexing of user terminal is corresponding, optimal beam during the non-space division multiplexing of user terminal and speed corresponding to optimal beam, wherein, wave beam when optimal beam refers to that user rate is optimum.
12. equipment according to claim 11, is characterized in that, described user selection unit selects the user terminal of space division multiplexing grouping to comprise:
Select N number of user terminal, the Correspondent Node number of wherein 2≤N≤maximum;
The ACK RSSI corresponding according to different beams during the described non-space division multiplexing of N number of user terminal, obtains total speed during described N number of user terminal space division multiplexing;
When total speed when described N number of user terminal space division multiplexing is greater than the summation of speed corresponding to the optimal beam of each user terminal, by described N number of user terminal composition space division multiplexing grouping.
13. equipment according to claim 12, is characterized in that,
Described transmitting-receiving control unit, also at the wave beam according to described formation, before the user terminal directive sending data that described space division multiplexing is divided into groups, carries out filling process to make the transmitting time of each packet identical to sent packet.
14. according to the arbitrary described equipment of claim 10-13, and it is characterized in that, described equipment also comprises:
Grouping selected cell, during for being grouped into multiple in the space division multiplexing selected, determines the sending order of described multiple space division multiplexing grouping according to the speed of space division multiplexing grouping and the service priority of space division multiplexing grouping.
15. equipment according to claim 14, it is characterized in that, the sending order of the speed determination space division multiplexing grouping that described grouping selected cell divides into groups according to space division multiplexing, and when the speed of space division multiplexing grouping is identical, according to the sending order of the service priority determination space division multiplexing grouping of space division multiplexing grouping; Or,
The sending order of the service priority determination space division multiplexing grouping that described grouping selected cell divides into groups according to space division multiplexing, and when the service priority of space division multiplexing grouping is identical, according to the sending order of the speed determination space division multiplexing grouping of space division multiplexing grouping.
16. equipment according to claim 14, is characterized in that, described equipment also comprises:
Updating block, for obtaining the average packet error rate of space division multiplexing packet user terminal, and when the average packet error rate of described space division multiplexing packet user terminal is more than or equal to setting threshold value, the user terminal of amendment space division multiplexing grouping.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010274369.3A CN102404027B (en) | 2010-09-07 | 2010-09-07 | Method and device for achieving space division multiplexing |
| PCT/CN2011/079346 WO2012031545A1 (en) | 2010-09-07 | 2011-09-05 | Method and device for realizing spatial division multiple access |
Applications Claiming Priority (1)
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| CN201010274369.3A CN102404027B (en) | 2010-09-07 | 2010-09-07 | Method and device for achieving space division multiplexing |
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| CN105229933B (en) * | 2013-08-27 | 2018-12-14 | 华为技术有限公司 | Space division multiplexing method and base station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101267235A (en) * | 2007-03-16 | 2008-09-17 | 大唐移动通信设备有限公司 | A method and device for realizing space division multiplexing |
| CN101316130A (en) * | 2007-06-01 | 2008-12-03 | 中国移动通信集团公司 | Community antenna system and method in closed loop mode |
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| CN1210975C (en) * | 2001-03-22 | 2005-07-13 | 中兴通讯股份有限公司 | Base station equipment and method for adaptive control of antenna beam |
| US20040142665A1 (en) * | 2003-01-21 | 2004-07-22 | Apostolos Papathanasion | Method and apparatus for diversity combining using a least squares approach |
| CN100392995C (en) * | 2004-11-17 | 2008-06-04 | 中兴通讯股份有限公司 | Down link multiple-user dispath for multiple-transmission antenna and multiple-receiving antenna system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101267235A (en) * | 2007-03-16 | 2008-09-17 | 大唐移动通信设备有限公司 | A method and device for realizing space division multiplexing |
| CN101316130A (en) * | 2007-06-01 | 2008-12-03 | 中国移动通信集团公司 | Community antenna system and method in closed loop mode |
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| CN102404027A (en) | 2012-04-04 |
| WO2012031545A1 (en) | 2012-03-15 |
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