CN101998410B - Method and device for grouping space division multiple address (SDMA) users - Google Patents
Method and device for grouping space division multiple address (SDMA) users Download PDFInfo
- Publication number
- CN101998410B CN101998410B CN 200910090558 CN200910090558A CN101998410B CN 101998410 B CN101998410 B CN 101998410B CN 200910090558 CN200910090558 CN 200910090558 CN 200910090558 A CN200910090558 A CN 200910090558A CN 101998410 B CN101998410 B CN 101998410B
- Authority
- CN
- China
- Prior art keywords
- terminal
- sdma
- channel
- base station
- physical channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000002955 isolation Methods 0.000 claims description 38
- 230000001174 ascending effect Effects 0.000 claims description 33
- 230000005540 biological transmission Effects 0.000 claims description 21
- 230000000737 periodic effect Effects 0.000 claims description 18
- 230000011664 signaling Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 description 13
- 230000001360 synchronised effect Effects 0.000 description 8
- 238000012546 transfer Methods 0.000 description 5
- 230000002708 enhancing effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000011002 quantification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method and a device for grouping space division multiple address (SDMA) users so as to improve the accuracy of grouping the SDMA users. The method comprises that: a base station schedules more than one terminal to transmit a signal of an uplink shared physical channel in a non-space division mode and determines whether a channel estimation result on the uplink shared physical channel of the last signal transmitted by a corresponding terminal is effective according to a fact that whether the time interval between the time when the last signal is transmitted on the uplink shared physical channel at each terminal and the current time exceeds the set corresponding first time threshold; and terminals with the effective channel estimation result are subjected to the SDMA grouping by an SDMA grouping algorithm.
Description
Technical field
The present invention relates to communication technical field, refer to especially a kind of method and device that carries out space division multiple access (SDMA) user grouping.
Background technology
SDMA distinguishes the spatial degrees of freedom that a plurality of users that take same asset utilize many antennas to provide, thereby realize a plurality of users' data transmit-receive, identical resource can be according in time slot, code channel and the frequency one or more, and the purpose of introducing SDMA is in order to improve the average data transfer rate of residential quarter.
The mode that realizes SDMA is relevant with the multi-antenna technology of employing.In intelligent antenna array, the sky that uses multi-beam figuration technology to carry out the multi-user divides, a plurality of wave beams are aimed at the user who takies same asset carry out data transmit-receive, directly improve on the one hand the signal interference ratio of desired user by wave beam forming, so as to improving performance or the availability of frequency spectrum of system; Carry out multiplexing by wave beam forming to limited frequency spectrum resource on the other hand.In the MIMO aerial array, use MU-MIMO (multiuser MIMO) technology, utilize user's space stalling characteristic to disturb in advance elimination at transmitting terminal, use different weight vectors can reduce interference between the user to the user base station array antenna that uses same asset to different user data.
Referring to shown in Figure 1, comprise in the prior art that the concrete step of the resource regulating method of SDMA user grouping is as follows:
Step 101: base station (NodeB) carries out channel estimating according to the up channel of each terminal, again in conjunction with uplink feedback informations such as CQI, utilizes certain algorithm that all terminals are dispatched.In scheduling process, when the resources such as time slot frequency code road are inadequate, can be a plurality of terminals and carry out the SDMA grouping.The user grouping algorithm depends on the angle isolation between the user, the quadrature isolation characteristic of space channel etc.
Step 102: if user grouping success, NodeB will be every group of SDMA user assignment same asset, and is the resource of its distribution by the control channel notification terminal.If user grouping is unsuccessful, then only come dispatched users with time-division, frequency division, code grading mode.
Step 103:Node B utilizes ZF, MMSE, BD scheduling algorithm according to information such as uplink channel estimation, calculates the wave beam forming coefficient of the terminal in the SDMA group, and the figuration direction of each terminal is different in the group, and the wave beam zero that mutually is positioned at the other side falls into.
The forming coefficient that step 104:Node B utilizes each terminal sends downlink data or receives upstream data the terminal in every group of SDMA, realizes that in Node B side the interference between each user eliminates.
Grouping between the terminal is by dynamically control of base station, because the movement of terminal and the variation of channel fading, so that user grouping situation time to time change.When in step 101, carrying out channel estimating according to the user uplink channel, the condition that the up channel of these terminal rooms need to satisfy is: can not have identical pilot tone at each subscriber channel that base station side receives simultaneously, otherwise can't effectively distinguish each user's channel estimating, also just can't carry out effective user grouping.
At present when carrying out the SDMA user grouping, often be used to judge that the up channel of each user's channel estimating all is that terminal periodic sends to the base station, such as the channel of following DPCH, semi-continuous scheduling, up sounding etc.The parameters such as the delivery time of these periodicity up channels, transmission cycle, duration are to be configured to each user by network side.Such as, the up DPCH of following is time division multiplexing to each user, the base station follows DPCH from different user what different time received, therefore can effectively distinguish each user's channel estimating, thereby carry out accurately user grouping.
According to the detailed discussion of prior art as can be known, need to distinguish in base station side each user's channel estimating, thereby carry out the SDMA user grouping.Therefore, can not have the situation of same pilot as the up channel of channel estimating when receiving appears in base station side, normally used up channel is the up channel that the user periodically sends, as follows DPCH etc.But, do not follow DPCH etc. periodically under the scene or state of up channels at some, such as the enhancing CELL_FACH state introduced among the HSPA+ etc., base station side is difficult to effectively distinguish each user's channel estimating, also just can not guarantee the realization of SDMA technology.Do user grouping even utilize the aperiodicity up channel with different pilot tones, because these channels are subjected to the impact of scheduling interval, when scheduling interval is larger, can causes channel estimation results can not follow the tracks of Real-time Channel and change, and channel estimating lost efficacy, and the SDMA user grouping is very inaccurate.There is not at present relevant design to solve this class problem.
Summary of the invention
The invention provides a kind of method and device that carries out the space division multiple access user grouping, in order to improve the accuracy of SDMA user grouping.
A kind of method of carrying out space division multiple access SDMA user grouping that the embodiment of the invention provides comprises:
A. above terminal of base station side scheduling sends the signal of up share class physical channel in non-NULL minute mode, whether and whether the signal that sent up share class physical channel according to each terminal last time surpass the corresponding very first time threshold value of setting with current time interval, determine the channel estimation results of the up share class physical channel of counterpart terminal transmitted signal last time effective;
B. utilize the SDMA grouping algorithm that the effective terminal of described channel estimation results is carried out the SDMA grouping.
A kind of device that carries out the space division multiple access user grouping that the embodiment of the invention provides comprises:
Scheduling unit is used for above terminal of scheduling sends up share class physical channel in non-NULL minute mode signal;
The first judging unit, whether the signal that is used for sending up share class physical channel last time according to each terminal surpasses the corresponding very first time threshold value of setting with the current time interval, and whether the channel estimation results of definite up share class physical channel to counterpart terminal transmitted signal last time is effective;
Grouped element is used for utilizing the SDMA grouping algorithm that the effective terminal of described channel estimation results is carried out the SDMA grouping.
A kind of method of carrying out space division multiple access SDMA user grouping that the embodiment of the invention provides comprises:
If the synchrotimer duration is less than the second time threshold of setting, base station side sends ascending control channel according to above terminal of synchrotimer periodic scheduling in a non-NULL minute mode, and described ascending control channel is the feedback channel of the down control channel of described synchrotimer control transmission;
Base station side utilizes the SDMA grouping algorithm that a described above terminal is carried out the SDMA grouping.
A kind of device that carries out space division multiple access SDMA user grouping that the embodiment of the invention provides comprises:
The first judging unit is used for judging that whether the synchrotimer duration is less than the second time threshold of setting;
The first scheduling unit, be used at the synchrotimer duration during less than the second time threshold of setting, above terminal of periodic scheduling sends ascending control channel in a non-NULL minute mode, and described ascending control channel is the feedback channel of the down control channel of described synchrotimer control transmission;
The first grouped element is used for utilizing the SDMA grouping algorithm that a described above terminal is carried out the SDMA grouping.
A kind of method of carrying out space division multiple access SDMA user grouping that the embodiment of the invention provides comprises:
If the synchrotimer duration is not less than the second time threshold of setting, base station side sends the signal of up share class physical channel in non-NULL minute mode according to above terminal of timer periodic scheduling of setting, and the timer duration of setting is less than the synchrotimer duration;
Base station side utilizes the SDMA grouping algorithm that the terminal of the signal of the up share class physical channel of described transmission is carried out the SDMA grouping.
A kind of device that carries out space division multiple access SDMA user grouping that the embodiment of the invention provides comprises:
Judging unit is used for the second time threshold of synchrotimer duration and setting is compared;
Scheduling unit, be used for being not less than at the synchrotimer duration the second time threshold of setting, send the signal of up share class physical channel in non-NULL minute mode according to above terminal of timer periodic scheduling of setting, and the timer duration of setting is less than the second time threshold;
Grouped element is used for utilizing the SDMA grouping algorithm that a described above terminal is carried out the SDMA grouping.
In embodiments of the present invention, above terminal of base station side scheduling sends the signal of up share class physical channel in non-NULL minute mode, whether and whether the signal that sent up share class physical channel according to each terminal last time surpass the corresponding very first time threshold value of setting with current time interval, determine the channel estimation results of the up share class physical channel of counterpart terminal transmitted signal last time effective; Utilize the SDMA grouping algorithm that the effective terminal of described channel estimation results is carried out the SDMA grouping.Or, if the synchrotimer duration is less than the second time threshold of setting, above terminal of base station side periodic scheduling sends ascending control channel in a non-NULL minute mode, described ascending control channel is the feedback channel of the down control channel of described synchrotimer control transmission, this moment is because the synchrotimer duration is smaller, the channel estimation results of then assert the ascending control channel that each terminal sent last time is effective, base station side utilizes the SDMA grouping algorithm that a described above terminal is carried out the SDMA grouping, has improved the accuracy of SDMA user grouping.
Description of drawings
Fig. 1 is the schematic flow sheet that comprises the resource regulating method of SDMA user grouping in the prior art;
Fig. 2 is the schematic flow sheet that the embodiment of the invention one is carried out the SDMA user grouping;
Fig. 3 is the schematic flow sheet that the embodiment of the invention two is carried out the SDMA user grouping;
Fig. 4 is a specific embodiment schematic flow sheet that carries out the SDMA user grouping of the embodiment of the invention;
Fig. 5 is the structural representation of the embodiment one of the present invention's device of carrying out the space division multiple access user grouping;
Fig. 6 is the structural representation of the embodiment two of the present invention's device of carrying out the space division multiple access user grouping.
Embodiment
In embodiments of the present invention, above terminal of base station side scheduling sends the signal of up share class physical channel in non-NULL minute mode, whether and whether the signal that sent up share class physical channel according to each terminal last time surpass the corresponding very first time threshold value of setting with current time interval, determine the channel estimation results of the up share class physical channel of counterpart terminal transmitted signal last time effective; Utilize the SDMA grouping algorithm that the effective terminal of described channel estimation results is carried out the SDMA grouping.If the synchrotimer duration is less than the second time threshold of setting, above terminal of base station side periodic scheduling sends ascending control channel in a non-NULL minute mode, described ascending control channel is the feedback channel of the down control channel of described synchrotimer control transmission, this moment is because the synchrotimer duration is smaller, the channel estimation results of then assert the ascending control channel that each terminal sent last time is effective, and base station side utilizes the SDMA grouping algorithm that a described above terminal is carried out the SDMA grouping.
Described up share class physical channel comprises arbitrarily reverse link traffic channel and ascending control channel etc., such as HS-SICH, and E-PUCH, E-RUCCH etc.The shared physical resource of up share class physical channel not can with the time distribute to a plurality of users, perhaps distribute to a plurality of users but will use different pilot tones.
The mode that described non-NULL divides refers to that the base station is that the uplink physical channel of each terminal distributes different physical resources or distributes the identical physical resources of using different pilot tones.
When terminal was in desynchronizing state, scheduling was not done to terminal in the base station, and this moment, the SDMA technology was not adopted to the user of step-out in the base station, did not just have the user grouping problem of SDMA yet.
Referring to shown in Figure 2, the specific implementation process of the embodiment of the invention one is as follows:
Step 201: above terminal periodic of base station side scheduling sends the signal of up share class physical channel in non-NULL minute mode.
Step 202: follow the signal that sent up share class physical channel last time according to each terminal and current time interval whether to surpass the corresponding very first time threshold value of setting, whether effectively determine the channel estimation results of the up share class physical channel of counterpart terminal transmitted signal last time.
Here, step 202 can realize in the following manner: judge whether signal that each terminal sent up share class physical channel last time and current time interval surpass the corresponding very first time threshold value of setting, if, then the channel estimation results of the up share class physical channel of definite counterpart terminal transmitted signal last time is effective, if not, then the channel estimation results of the up share class physical channel of definite counterpart terminal transmitted signal last time is invalid.Very first time threshold value corresponding to each terminal can be identical, also can be different.
When described up share class physical channel is the corresponding uplink feedback channel of down control channel that synchrotimer control sends, it is ascending control channel, when synchrotimer is overtime, base station side triggers the transmission of a down control channel, synchrotimer with regard to reclocking once, twice trigger interval is exactly the synchrotimer duration, terminal is whenever received the signal of a down control channel, just need to feed back by ascending control channel to base station side, that is to say, a uplink feedback signal also will be received every the synchrotimer duration in the base station.If the synchrotimer duration of base station side is smaller, as less than the second time threshold of setting, can judge that then counterpart terminal satisfies empty minute condition.The second time threshold can be taken as the typical cycle value of the periodicity up channel that is used as the SDMA user grouping in the existing system.
Up share class physical channel can for: any one reverse link traffic channel also can be ascending control channel.The judgment mode that adopts when this situation can be larger for the synchrotimer time length ratio of base station side also can not considered the synchrotimer duration, directly the judgment mode of employing.
Very first time threshold value corresponding to each terminal can be identical, also can be different.Each very first time threshold value can corresponding timer.And described very first time threshold value can be to preset to be kept at base station side, or base station side is received by high-level signaling.
Step 203: utilize the SDMA grouping algorithm that the effective terminal of described channel estimation results is carried out the SDMA grouping.Detailed process can be as follows:
The base station utilizes the SDMA grouping algorithm to the channel estimation results of the up share class physical channel of the last time of the effective terminal of described channel estimation results and the feedback information in the up share class physical channel, determine the isolation of per two terminal rooms, and isolation is satisfied the terminal that corresponding SDMA divides set condition be divided into SDMA group.
Described isolation is the passage ownership interval in the indoor environment, or estimate the expectation terminal figuration received power and the ratio of its terminal to the interference power of expectation terminal of utilizing beamforming algorithm to calculate according to the up share class physical channel of each terminal for base station side in the outdoor environment, or be the terminal room arrival angle intervals in the outdoor environment.
In embodiments of the present invention, isolation can be satisfied corresponding SDMA divides terminal set condition and that satisfy the setting priority level to be divided in the SDMA group, also isolation can be satisfied corresponding SDMA divides terminal set condition and that maximum throughput can be provided in group together to be divided in the SDMA group, it is also conceivable that the situation that terminal PRI is other and maximum throughput is provided together in group, divide the SDMA group.
Be subject to the impact of the factors such as each user moving speed and physical location, need to adjust on the basis of timer thresholding initial value.Base station statistics each user's within certain period passage ownership or arrival angle or the isoparametric change frequency of received power, whenever described parameter changes and variable quantity when surpassing certain predetermined value, the base station statistics once, be shortened the effective time that changes the channel estimating information that this user last time is described sooner, turn the timer thresholding down, otherwise, change then tuning up slowly the timer thresholding.
Before step 201, can further include: base station side judges that whether the synchrotimer duration is less than the second time threshold of setting, if be not less than, then execution in step 201, if less than, then above terminal of base station side periodic scheduling sends ascending control channel in a non-NULL minute mode, and described ascending control channel is the feedback channel of the down control channel of described synchrotimer control transmission, and base station side utilizes the SDMA grouping algorithm that a described above terminal is carried out the SDMA grouping.Like this, can directly utilize the estimated result of feedback channel of the down control channel of synchrotimer control to carry out the SDMA grouping.
Can find out from such scheme, if the interval of the down control channel that the base station sends is less, then do not need the uplink channel estimation of other up channel, but can utilize terminal to do the user grouping that channel estimating is finished SDMA according to the up channel of the down control channel transmission of base station; If the described down control channel interval that the base station sends is larger, then can assist the channel estimating with other up channel.Comprise: descending scheduling is done to terminal in the base station, and the correspondence of terminal feedback the uplink feedback channel of downlink traffic channel, and this uplink feedback channel can not distributed to a plurality of users and use simultaneously; Perhaps, when uplink scheduling is done to terminal in the base station, terminal sends reverse link traffic channel at the physical resource of base station assigns, the base station utilizes this channel to do each user's channel estimating, this moment, the base station was each user's the different physical resource of reverse link traffic channel distribution, although perhaps distribute identical physical resource to distribute different pilot tones; Perhaps, semi-continuous scheduling is done to terminal in the base station, utilizes the periodicity up channel in the semi-continuous scheduling to do channel estimating.
In the step 202, can judge by timer is set the validity of uplink channel estimation.No matter be in descending scheduling or the uplink scheduling, if whether the signal that sent up share class physical channel according to each terminal last time surpasses the corresponding very first time threshold value of setting with current time interval, think that then the channel estimation results of up share class physical channel of this terminal transmitted signal last time is effective.
When accessing terminal to network, activate the timer that arranges for this user in base station side; The base station scheduling terminal is carried out transfer of data, comprises up or descending transfer of data.Breaking with network when terminal links, and when exitting network, the base station cancellation is the timer of this terminal setting.
Referring to shown in Figure 3, the detailed process of the embodiment of the invention two is as follows:
Step 301: if base station side determines that the synchrotimer duration is less than the second time threshold of setting, above terminal of periodic scheduling sends ascending control channel in a non-NULL minute mode, and described ascending control channel is the feedback channel of the down control channel of described synchrotimer control transmission;
Step 302: base station side utilizes the SDMA grouping algorithm that a described above terminal is carried out the SDMA grouping.
If the synchrotimer duration is not less than the second time threshold of setting, then base station side can also send according to above terminal of timer periodic scheduling of setting the signal of up share class physical channel in non-NULL minute mode, and the timer duration of setting is less than the synchrotimer duration; Base station side utilizes the SDMA grouping algorithm that the terminal of the signal of the up share class physical channel of described transmission is carried out the SDMA grouping.
And the up share class physical channel here can be any one reverse link traffic channel, or is ascending control channel.
Above-mentioned Fig. 2 and embodiment illustrated in fig. 3 in, therefore, according to top discussion, when in the base station terminal being dispatched, can periodically send by transmission down control channel triggering terminal and keep synchronous up channel, channel estimating is done in the base station, carries out the user grouping of SDMA.At this moment, do not need auxiliary channel estimating with other up channel; Perhaps, the base station arranges described timer length less than synchrotimer length, and dispatched users by descending scheduling or uplink scheduling, if make the terminal user grouping unsuccessful, is then only come with time-division, frequency division, code grading mode in the base station during terminal synchronizes.If user grouping success, the base station will be every group of SDMA user assignment same asset, and is the resource of its distribution by the control channel notification terminal.The base station adopts interference cancellation techniques that every group of SDMA user sent downlink data or receive upstream data.
Base station side presets the timer thresholding, this timer thresholding can be unique value when certain user and other any user divide into groups, perhaps the timer thresholding can be a plurality of values, and described a plurality of values are the timing time length threshold Tth that provide the timer under the disturbance degree that quantizes between the user.As: for indoor environment, described annoyance level decays to characterize with the user power that user's passage ownership interval or base station side receive; For outdoor environment, described annoyance level can utilize the multi-antenna array wave beam forming to merge interference user that reception technique receives to the interference power of desired user by the base station, perhaps characterizes for the angle isolation between the different user etc.The timer thresholding can be determined by in advance emulation or test.The timer thresholding can preset in base station side, is perhaps configured to the base station by high-level signaling.
Describe technical scheme of the present invention in detail below in conjunction with accompanying drawing.
In TDD HSPA+ system, introduce enhancing CELL_FACH technology, namely under the CELL_FACH state, improved transmission rate, reduction state conversion time delay etc. with the HSPA channel.In strengthening CELL_FACH, removed and followed the DPCH channel, therefore also just can't rely on the user grouping of following DPCH to realize SDMA.According to the present invention, in the situation that the up DPCH that follows not periodically, the up channel when utilizing scheduling or keep synchronous up channel and carry out the SDMA user grouping.Uplink physical channel among the HSPA comprises E-RUCCH, HS-SICH and E-PUCH etc.
E-RUCCH is the enhancing uplink random access channel of terminal, and synchronous detection of loss of mains is based on the timer T-sync of base station side under enhancing CELL_FACH state.When dispatch terminal the base station, in order to keep synchronous, timer T-sync can be safeguarded in the base station, the base station issues HS-SCCH order, terminal receives that the backward base station of HS-SCCH order sends E-RUCCH, timer T-sync is restarted after receiving E-RUCCH in the base station, and when T-sync was overtime, the base station issued HS-SCCH order again.In order to carry out the SDMA user grouping, the base station can utilize E-RUCCH to carry out uplink channel estimation.Even base station decodes E-RUCCH mistake, and use again notification terminal transmission E-RUCCH of HS-SCCH order, but being data portion, verification E-RUCCH carries out CRC check, so channel estimating still will be done.Strengthening under the CELL_FACH state, be summarized as follows:
(1) terminal is in step-out, and scheduling is not done to terminal in the base station, and this moment, the SDMA technology was not adopted to the user of step-out in the base station, did not just have the user grouping problem of SDMA yet.
(2) when dispatch terminal the base station, send HS-SCCH order, send out E-RUCCH on the terminal.Same E-RUCCH can not used by a plurality of users simultaneously, and namely E-RUCCH does not carry out sky and divides.Base station maintenance timer T-sync then sends out E-RUCCH on the notification terminal again whenever T-sync is overtime.The base station utilizes E-RUCCH to do uplink channel estimation, recycles this channel estimating and carries out the SDMA user grouping.For indoor environment, judge user's passage ownership, upgrade each user attaching of base station stored; For outdoor environment, judgement user's angle intervals or the C/I between the user (this user received power/treat that grouping user is to this user's interference power) etc.
Need to prove: for so that strengthening the channel estimating of utilizing E-RUCCH under the CELL_FACH state and do the user grouping of SDMA, need so that the duration of T-sync can not be long, for example get in the length of T-sync and the existing SDMA technology and follow the cycle of DPCH close, equivalent such as 80ms.
If it is long to keep synchronous base station side timer T-sync to arrange, then in order to guarantee the promptness of each user uplink channel estimating, can re-use other up channel, specific as follows:
(a) when the HSDPA scheduling is carried out to terminal in the base station, utilize HS-SCCH that the multi-user is dispatched, need so to arrange HS-SICH and be not SDMA.The scheduling when carrying out transfer of data, if in order to keep uplink synchronous, the base station can send HS-SCCH with certain cycle and keep synchronously, the HS-SCCH of dispatch terminal when being different from the transmission of data, this keeps synchronous HS-SCCH can adopt special format, and the bit of for example setting signaling TBS is 0.Corresponding up channel HS-SICH as HS-SCCH can not use empty minute technology, namely can not a plurality of users use simultaneously same HS-SICH.The base station utilizes the HS-SICH channel to do uplink channel estimation, utilizes this channel estimating to carry out the SDMA user grouping.The transmission of HS-SICH can utilize the resource fragmentation of ascending time slot, as having distributed the code channel of certain remaining behind other ascending resource SF=16 in the time slot.
(b) when the HSUPA scheduling was carried out to terminal in the base station, the channel E-PUCH that utilizes each user uplink to send did channel estimating.For channel estimating that can dividing multi-user, need the base station when dispatching, to be the different time-slot code channel resource of each user assignment at E-AGCH, although perhaps identical time-slot code channel resource is distributed for each user in the base station, distribute different pilot tone (midamble shift).Then the base station utilizes E-PUCH to carry out uplink channel estimation, recycles the user grouping that this channel estimating is SDMA.The scheduling when carrying out transfer of data, if in order to keep uplink synchronous, the E-PUCH that carries SI that the base station can utilize E-AGCH and terminal to send, also can utilize E-PUCH and E-HICH in the semi-continuous scheduling, but in any case, to guarantee that all E-PUCH can not adopt SDMA, perhaps use SDMA but will take different pilot tones.
Arrange when long at T-sync, the SDMA user grouping is done for the user arranges timer in the base station, and this timer can be used for the HS-SICH cycle that above-mentioned a) base station scheduling terminal sends, and b) E-PUCH cycle of sending of middle base station scheduling terminal.When terminal has the uplink service of the periodicity up channel that is different from base station scheduling to be sent, when perhaps terminal had the uplink feedback of downlink business of the periodicity up channel that is different from base station scheduling to be sent, the base station need to be judged in terminal is adjacent during sending up channel twice uplink channel estimation validity according to the timer of described setting.Detailed process such as following description:
If current have a N user access network, activate N timer in base station side for these users, and it is as shown in table 1 to establish the timing thresholding (being timing length effective time) of timer:
| Annoyance level | I1 | I2 | I3 | ...... |
| The timing thresholding | Tth(1) | Tth(2) | Tth(3) | ...... |
Table 1
Wherein, if for indoor distributed system, then annoyance level can be decayed to represent with user's the user power that passage belongs to or base station side receive, for example I1 represents that the user belongs to same channels (user's power attenuation is less than power attenuation value that passage is required of data experience), I2 represents the user to be positioned at adjacency channel, and (user's power attenuation is greater than power attenuation value that passage is required of experience, but less than two power attenuation values that passage is required of experience), I3 represents the user to be positioned at the different passages of the passage in interval, and (user's power attenuation is greater than two power attenuation values that passage is required of experience, but less than three power attenuation values that passage is required of experience), the like.For outdoor system, annoyance level can utilize the multi-antenna array wave beam forming to merge interference user that reception technique receives to the interference power of desired user by the base station, perhaps (think that the angle isolation is larger for the angle isolation between the different user, then annoyance level is less), perhaps also can represent for other index that can characterize the inter-user interference degree.Each timer thresholding can be determined by in advance emulation or test.
When terminal sent up channel, uplink channel estimation was all carried out in the base station, and restarts the timer of this terminal.These up channels can comprise E-RUCCH, HS-SICH, E-PUCH etc.Wherein, require a plurality of users' that base station side receives at the same time up channel can not use identical pilot tone.In TDDHSPA+, specifically refer to the HS-SICH or the E-RUCCH that do not use the SDMA technology, perhaps do not use the E-PUCH of SDMA, perhaps used SDMA still to organize the E-PUCH that interior user adopts different midamble shift.
Referring to shown in Figure 4, the specific implementation process of the present embodiment is as follows:
Step 401: be located at the SDMA user grouping of carrying out 2 users among N the user, to certain user, set its annoyance level with other N-1 user corresponding N-1 timing thresholding Tth (1)～Tth (N-1).This N user is made as Tout (i), i=1～N the timer expired time separately.The establishing method of Tth comprises: for certain user, its Tth (i) can be set as same time span, as Tth (1)=Tth (2)=...=80ms, implementing like this can be simple, but can not demonstrate fully the difference of the timer validity when dividing into groups between different degree of isolation users.So each user's Tth (i) also can followingly be set:
For indoor heating system, can set Tth (1) and be certain typical time span, equivalent such as 80ms, Tth (i) is made as the linear multiple of Tth (1).Tout is made as two interchannel timing length effective time at a distance of farthest.
For outdoor system, the angle isolation can be divided into some quantification gradations, ascending I (1), the I (2) of being respectively ...Perhaps interference power is divided into some quantification gradations, is expressed as respectively I (1), I (2) ...The Tth (1) that correspondence I (1) is made as certain typical time span, and such as 80ms, Tth (i) is made as the linear multiple of Tth (1).Tout is made as the angle isolation of greatest level or timing length effective time of maximum interference power grade.
Step 402: at first carry out the judgement of timer effective status.Consider first the user that dispatching priority is high, this user's present timing device timing length is T, if T＞Tout illustrates that then the channel estimating information of this user last time is out-of-date, then this user does not participate in the grouping of SDMA.If T does not surpass Tout, then according to dispatching priority order from high to low with N-1 user respectively thresholding and the T corresponding with this user's annoyance level compare, be located at the T that has M-1 user to satisfy current this user among this N-1 user and be no more than corresponding timing thresholding.Then, see again whether this M-1 user timer separately is effective, thresholding be these users respectively with this user between timing thresholding corresponding to annoyance level, if have K-1 user's timer effective among M-1 the user, illustrate that then this user might carry out the SDMA grouping with this K-1 user, a this user and K-1 user's last channel estimating information all is effectively, can use the SDMA grouping algorithm.And any grouping among this user and all the other N-K the user, every group at least always has user's timer to be in disarmed state, and namely last channel estimating information is out-of-date, so do not carry out this user and this N-K user's the SDMA judgement of dividing into groups.
Step 403: a plurality of users that correspondence the timer effective status carry out the judgement that SDMA divides into groups.The SDMA grouping is carried out to this user and an above-mentioned K-1 user in the base station, utilizes existing SDMA grouping algorithm, as long as and the isolation between this user satisfy the user that SDMA divides set condition and can be divided into one group.Concrete, divide set condition if there is L user and current this user's isolation to satisfy SDMA among K-1 user, then among this user and this L the user any can be divided into one group, also need in the reality in conjunction with the dispatching priority of users in the dispatching algorithm, be divided into one group such as L the highest user and current this user of user's medium priority, but perhaps L user's medium priority not the highlyest can provide the user of maximum throughput and current this user to be divided into one group with current this user.
For indoor isolation, can belong to for passage, thinking that isolation satisfies SDMA between the user of different passages ownership divides set condition;
For outdoor isolation, can utilize beamforming algorithm to calculate C/I between per two users according to each user's uplink channel estimation in base station side, wherein C is a user's figuration received power, I is that figuration merges rear another user to this user's interference power, when C/I was worth greater than certain, thinking that isolation satisfies SDMA between these two users divided set condition; Perhaps for outdoor, can be with the angle of arrival as the isolation index, when two users' angle intervals during greater than certain value (such as 20 degree), think that satisfying SDMA divides set condition.Because outdoor scene may have two users' angle intervals and reach a minute set condition, but but very near apart from the base station, so mutual interference also is may be larger, therefore can also on the basis of the angle of arrival, measure user's received power in conjunction with the base station, such as utilizing two angle intervals values to be divided into Three regions, be two users angle intervals greater than certain value (as 40 the degree) time think that satisfying SDMA divides set condition, two users' angle intervals less than another value (as 20 the degree) time think that not satisfying SDMA divides set condition, two users' angle intervals is (as greater than 20 degree and less than 40 degree) between these two values the time, go again to see that the base station is to these two users' received power measurement, when this two users' received power measured value during all less than certain thresholding, think that just they satisfy SDMA and divide set condition.
Step 404: the adjustment of timer thresholding.User's timer thresholding is subject to the impact of the factors such as each user moving speed and physical location, therefore need to adjust on the basis of timer thresholding initial value (threshold value of setting in such as above-mentioned (1)).Concrete grammar as:
Base station statistics each user's within certain period passage ownership or arrive the change frequency of angle or received power, be shortened the effective time that changes the channel estimating information that this user last time is described sooner, should correspondingly turn the timer thresholding down.As to establish this section period be Tstat, certain user sends m up channel to the base station in Tstat, the base station is carried out the m secondary channel and is estimated, and keep up-to-date channel estimating information, and the base station receives the change frequency of adding up this subscriber channel ownership in this user uplink channel procedure or arriving angle or received power at this m time, wherein, for indoor heating system, when the every replacing one subchannel ownership of user, then the base station statistics once; For outdoor system, when user's every adjacent twice arrival angle or received power variable quantity or path loss variable quantity surpass certain value, then the base station statistics once, this value can be made as certain typical number of degrees for arriving angle, spends etc. such as 5.The base station adjusts according to the timer thresholding of the These parameters change frequency of adding up certain user at Tstat in the time to this user, such as, the datum quantity of timer thresholding adjustment is Tdelta, the datum quantity of change frequency is S, when change frequency during greater than a * S time and less than (a+1) * S time, and timer thresholding downward modulation a * Tdelta, then thresholding Tth becomes Tth-a * Tdelta, a=0 wherein, 1 ...If the change frequency in next Tstat is greater than b * S time and less than (b+1) * S time, if b=a does not then adjust the timer thresholding; If b＞a, then timer thresholding downward modulation (b-a) * Tdelta; If b＜a, then the timer thresholding raises (a-b) * Tdelta, b=0 wherein, and 1 ...The rest may be inferred.
In the above-described embodiments, at first whether be in effective status according to the timer of each user between the user and select the user that may divide into groups; Then these users that may divide into groups are used existing SDMA grouping algorithm, select isolation and satisfy the user that SDMA divides set condition; Isolation is satisfied the user that SDMA divides set condition, and in conjunction with dispatching priority, which user of final decision is divided into one group.
Referring to shown in Figure 5, a kind of device that carries out the space division multiple access user grouping of the embodiment of the invention comprises: scheduling unit 51, the first judging unit 52 and the first grouped element 53.
Scheduling unit 51 is used for above terminal of scheduling sends up share class physical channel in non-NULL minute mode signal;
The first judging unit 52, whether the signal that is used for sending up share class physical channel last time according to each terminal surpasses the corresponding very first time threshold value of setting with the current time interval, and whether the channel estimation results of definite up share class physical channel to counterpart terminal transmitted signal last time is effective;
Grouped element 53 is used for utilizing the SDMA grouping algorithm that the effective terminal of described channel estimation results is carried out the SDMA grouping.
This device also further comprises:
Whether the second judging unit 54 is used for judging the synchrotimer duration less than the second time threshold of setting,
Trigger element 55 when being not less than the second time threshold of setting for the synchrotimer duration, triggers the judgement of the first judging unit;
Then described scheduling unit 51 is used for above terminal of periodic scheduling and sends ascending control channel in a non-NULL minute mode;
Described grouped element 53 also is used for during less than the second time threshold of setting, utilizing the SDMA grouping algorithm that a described above terminal is carried out the SDMA grouping at the synchrotimer duration.
Described the first judging unit 52, be used for judging that signal that each terminal sent up share class physical channel last time and current time interval are whether above the corresponding very first time threshold value of setting, if, then the channel estimation results of the up share class physical channel of definite counterpart terminal transmitted signal last time is effective, if not, then the channel estimation results of the up share class physical channel of definite counterpart terminal transmitted signal last time is invalid.
Very first time threshold value corresponding to each terminal is identical, or different.
Described grouped element 53, for the channel estimation results of the up share class physical channel that utilizes effective terminal the last time of described channel estimation results and the feedback information of up share class physical channel, determine the isolation of per two terminal rooms, and isolation is satisfied the terminal that corresponding SDMA divides set condition be divided into SDMA group.
Described grouped element 53 is used for that isolation is satisfied corresponding SDMA and divides terminal set condition and that satisfy the setting priority level to be divided into a SDMA group.
Described grouped element 53 is used for that isolation is satisfied corresponding SDMA and divides terminal set condition and that maximum throughput can be provided in group together to be divided into a SDMA group.
Also further comprise:
Adjustment unit 56, effective time of channel estimating information of be used for determining the up share class physical channel of a terminal is when changing, and then the second time threshold that this terminal is corresponding is adjusted accordingly.
Described grouped element 53, be used for the channel estimation results of up share class physical channel of terminal the last time and the feedback information of up share class physical channel, determine the isolation of per two terminal rooms, and isolation is satisfied the terminal that corresponding SDMA divides set condition be divided into SDMA group, wherein, described isolation is the passage ownership interval in the indoor environment, or estimate the expectation terminal figuration received power and the ratio of its terminal to the interference power of expectation terminal of utilizing beamforming algorithm to calculate according to the up share class physical channel of each terminal for base station side in the outdoor environment, or be the terminal room arrival angle intervals in the outdoor environment.
Described up share class physical channel can be any one reverse link traffic channel, or is ascending control channel.
Referring to shown in Figure 6, the another kind that the embodiment of the invention provides carries out the device of SDMA user grouping, comprising:
The first judging unit 61 is used for judging that whether the synchrotimer duration is less than the second time threshold of setting;
The first scheduling unit 62, be used at the synchrotimer duration during less than the second time threshold of setting, above terminal of periodic scheduling sends ascending control channel in a non-NULL minute mode, and described ascending control channel is the feedback channel of the down control channel of described synchrotimer control transmission;
The first grouped element 63 is used for utilizing the SDMA grouping algorithm that a described above terminal is carried out the SDMA grouping.
Can further include:
The second scheduling unit, be used for when the synchrotimer duration is not less than the second time threshold of setting, send the signal of up share class physical channel in non-NULL minute mode according to above terminal of timer periodic scheduling of setting, and the timer duration of setting is less than the synchrotimer duration;
The second grouped element is used for utilizing the SDMA grouping algorithm that the terminal of the signal of the up share class physical channel of described transmission is carried out the SDMA grouping.
The embodiment of the invention also provides a kind of device that carries out space division multiple access SDMA user grouping, comprising:
Judging unit is used for the second time threshold of synchrotimer duration and setting is compared;
Scheduling unit, be used for being not less than at the synchrotimer duration the second time threshold of setting, send the signal of up share class physical channel in non-NULL minute mode according to above terminal of timer periodic scheduling of setting, and the timer duration of setting is less than the second time threshold;
Grouped element is used for utilizing the SDMA grouping algorithm that a described above terminal is carried out the SDMA grouping.
Described up share class physical channel is: any one reverse link traffic channel, or be ascending control channel.
In embodiments of the present invention, in the scene that does not have dedicated channel resource, base station periodic scheduling terminal, and whether effective according to the channel estimation results of the up share class physical channel of the nearest transmission of terminal in the scheduling process; Carry out the SDMA grouping according to the channel estimation results to the up share class physical channel of the last transmitted signal of the effective terminal of described channel estimation results, perhaps at the synchrotimer duration during less than the second time threshold of setting, utilize the SDMA grouping algorithm that a described above terminal is carried out the SDMA grouping, thereby effectively guarantee the effective terminal that up share class physical channel is estimated is just carried out the SDMA user grouping, improved the grouping precision, so that under the scene or state that do not have the periodicity up channel, base station side is distributed for the multi-access mode resource of the user being carried out SDMA, and utilize other aperiodicity up channel with different pilot tones to distinguish user's channel estimating, guarantee the realization of SDMA technology.The mode of the embodiment of the invention is applicable to any communication system.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (19)
1. a method of carrying out space division multiple access SDMA user grouping is characterized in that, the method may further comprise the steps:
A. above terminal of base station side scheduling sends the signal of up share class physical channel in non-NULL minute mode, whether and whether the signal that sent up share class physical channel according to each terminal last time surpass the corresponding very first time threshold value of setting with current time interval, determine the channel estimation results of the up share class physical channel of counterpart terminal transmitted signal last time effective;
B. utilize the SDMA grouping algorithm that the effective terminal of described channel estimation results is carried out the SDMA grouping.
2. method according to claim 1 is characterized in that, the method further comprises:
A01, base station side judge that the synchrotimer duration whether less than the second time threshold of setting, if be not less than, then sets very first time threshold value less than the second time threshold, execution in step A, if less than, execution in step A02 then;
A02, above terminal of base station side periodic scheduling send ascending control channel in a non-NULL minute mode, and described ascending control channel is the feedback channel of the down control channel of described synchrotimer control transmission,
A03, base station side utilize the SDMA grouping algorithm that above terminal described in the steps A 02 is carried out the SDMA grouping.
3. method according to claim 1 and 2 is characterized in that, whether the signal that sent up share class physical channel last time according to each terminal in the steps A surpasses the corresponding very first time threshold value of setting with the current time interval, comprising:
Judge whether signal that each terminal sent up share class physical channel last time and current time interval surpass the corresponding very first time threshold value of setting, if, then the channel estimation results of the up share class physical channel of definite counterpart terminal transmitted signal last time is effective, if not, then the channel estimation results of the up share class physical channel of definite counterpart terminal transmitted signal last time is invalid.
4. method according to claim 1 is characterized in that, very first time threshold value corresponding to each terminal is identical, or different.
5. method according to claim 1 is characterized in that, the method further comprises:
If base station side determines effective time of channel estimating information of the up share class physical channel of a terminal and change, then very first time threshold value that this terminal is corresponding is adjusted accordingly.
6. method according to claim 1 is characterized in that, described very first time threshold value is to preset to be kept at base station side, or base station side is received by high-level signaling.
7. method according to claim 1 is characterized in that, step B comprises:
The base station utilizes the channel estimation results of up share class physical channel of effective terminal the last time of described channel estimation results and the feedback information in the up share class physical channel, determine the isolation of per two terminal rooms, and isolation is satisfied the terminal that corresponding SDMA divides set condition be divided into SDMA group
Described isolation is the passage ownership interval in the indoor environment, or estimate the expectation terminal figuration received power and the ratio of other terminal to the interference power of expectation terminal of utilizing beamforming algorithm to calculate according to the up share class physical channel of each terminal for base station side in the outdoor environment, or be the terminal room arrival angle intervals in the outdoor environment.
8. method according to claim 7 is characterized in that, isolation is satisfied corresponding SDMA divide terminal set condition and that satisfy the setting priority level to be divided in the SDMA group.
9. method according to claim 7 is characterized in that, isolation is satisfied corresponding SDMA divide terminal set condition and that maximum throughput can be provided in group together to be divided in the SDMA group.
10. method according to claim 1 is characterized in that, described up share class physical channel is: any one reverse link traffic channel, or be ascending control channel.
11. a device that carries out the space division multiple access user grouping is characterized in that, comprising:
Scheduling unit is used for above terminal of scheduling sends up share class physical channel in non-NULL minute mode signal;
The first judging unit, whether the signal that is used for sending up share class physical channel last time according to each terminal surpasses the corresponding very first time threshold value of setting with the current time interval, and whether the channel estimation results of definite up share class physical channel to counterpart terminal transmitted signal last time is effective;
Grouped element is used for utilizing the SDMA grouping algorithm that the effective terminal of described channel estimation results is carried out the SDMA grouping.
12. device according to claim 11 is characterized in that, further comprises:
Whether the second judging unit is used for judging the synchrotimer duration less than the second time threshold of setting,
Trigger element when being used for the synchrotimer duration and being not less than the second time threshold of setting, is set very first time threshold value, and very first time threshold value is not more than the synchrotimer duration, and triggers the judgement of the first judging unit;
Then described scheduling unit is used for above terminal of periodic scheduling and sends ascending control channel in a non-NULL minute mode;
Described grouped element is further used for during less than the second time threshold of setting, utilizing the SDMA grouping algorithm that an above terminal of described transmission ascending control channel is carried out the SDMA grouping at the synchrotimer duration.
13. according to claim 11 or 12 described devices, it is characterized in that, described the first judging unit, be used for judging that signal that each terminal sent up share class physical channel last time and current time interval are whether above the corresponding very first time threshold value of setting, if, then the channel estimation results of the up share class physical channel of definite counterpart terminal transmitted signal last time is effective, if not, then the channel estimation results of the up share class physical channel of definite counterpart terminal transmitted signal last time is invalid.
14. device according to claim 11 is characterized in that, very first time threshold value corresponding to each terminal is identical, or different.
15. device according to claim 11, it is characterized in that, described grouped element, for the channel estimation results of the up share class physical channel that utilizes effective terminal the last time of described channel estimation results and the feedback information of up share class physical channel, determine the isolation of per two terminal rooms, and isolation is satisfied the terminal that corresponding SDMA divides set condition be divided into SDMA group.
16. device according to claim 15 is characterized in that, described grouped element is used for that isolation is satisfied corresponding SDMA and divides terminal set condition and that satisfy the setting priority level to be divided into a SDMA group.
17. device according to claim 15 is characterized in that, described grouped element is used for that isolation is satisfied corresponding SDMA and divides terminal set condition and that maximum throughput can be provided in group together to be divided into a SDMA group.
18. device according to claim 11 is characterized in that, further comprises:
Adjustment unit, effective time of channel estimating information of be used for determining the up share class physical channel of a terminal is when changing, and then the second time threshold that this terminal is corresponding is adjusted accordingly.
19. device according to claim 11 is characterized in that, described up share class physical channel is: any one reverse link traffic channel, or be ascending control channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910090558 CN101998410B (en) | 2009-08-20 | 2009-08-20 | Method and device for grouping space division multiple address (SDMA) users |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910090558 CN101998410B (en) | 2009-08-20 | 2009-08-20 | Method and device for grouping space division multiple address (SDMA) users |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210532227.1A Division CN102970685B (en) | 2009-08-20 | 2009-08-20 | Method and device for performing space division multiple access user grouping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101998410A CN101998410A (en) | 2011-03-30 |
| CN101998410B true CN101998410B (en) | 2013-04-03 |
Family
ID=43787786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910090558 Active CN101998410B (en) | 2009-08-20 | 2009-08-20 | Method and device for grouping space division multiple address (SDMA) users |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101998410B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107846266B (en) * | 2016-09-18 | 2022-03-04 | 中兴通讯股份有限公司 | Time-frequency resource space division scheduling method and device |
| CN113811010B (en) * | 2020-06-12 | 2023-03-24 | 大唐移动通信设备有限公司 | Multi-user MIMO scheduling method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1388964A1 (en) * | 2002-08-06 | 2004-02-11 | Mitsubishi Electric Information Technology Centre Europe B.V. | Transmission quality reporting method |
| CN1933649A (en) * | 2005-09-12 | 2007-03-21 | 大唐移动通信设备有限公司 | Down beam shaping method in multi-carrier high-speed down group switching-in |
| CN101060389A (en) * | 2006-04-20 | 2007-10-24 | 大唐移动通信设备有限公司 | A TD-CDMA system performance optimization method |
| 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 |
| CN101414874A (en) * | 2007-10-19 | 2009-04-22 | 中兴通讯股份有限公司 | Method for judging down space division multiple access mode of TDD system |
-
2009
- 2009-08-20 CN CN 200910090558 patent/CN101998410B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1388964A1 (en) * | 2002-08-06 | 2004-02-11 | Mitsubishi Electric Information Technology Centre Europe B.V. | Transmission quality reporting method |
| CN1933649A (en) * | 2005-09-12 | 2007-03-21 | 大唐移动通信设备有限公司 | Down beam shaping method in multi-carrier high-speed down group switching-in |
| CN101060389A (en) * | 2006-04-20 | 2007-10-24 | 大唐移动通信设备有限公司 | A TD-CDMA system performance optimization method |
| 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 |
| CN101414874A (en) * | 2007-10-19 | 2009-04-22 | 中兴通讯股份有限公司 | Method for judging down space division multiple access mode of TDD system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101998410A (en) | 2011-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100473214C (en) | Movable communication system, base station equipment and movable communication system controlling method | |
| US9008678B2 (en) | Dynamic multiple input and multiple output cell cluster | |
| CN101902261A (en) | Base station and radio communication method | |
| WO2007066073A1 (en) | Point to multipoint device for communication with a plurality of telecommunications units | |
| CN102316597A (en) | Resource scheduling method and device for multiple input multiple output (MIMO) system | |
| CN101160742A (en) | High rate packet data spatial division multiple access (sdma) | |
| KR20060110327A (en) | Method and system of radio communications of traffic with different characteristic | |
| CN103384179B (en) | Use the uplink-downlink configuration method and equipment in the system of time division duplex communication standard | |
| CN101364832A (en) | Adaptive switching method between spatial division multiplexing and code division multiplexing | |
| CN102413487A (en) | Performance evaluation system aiming at Relay technology in LTE-A (Long Term Evolution-Advanced) system | |
| CN104412535A (en) | Methods and nodes for multiple user mimo scheduling | |
| CN106027214B (en) | A kind of extensive mimo system pilot distribution method of multiple cell | |
| CN101854668A (en) | Method, system and device for data transmission under MU-MIMO system | |
| EP1914909A1 (en) | Downlink scheduling method for MIMO/MISO cellular systems with limited feedback signalling | |
| EP1876847A1 (en) | A method for scheduling of user terminals in an SDMA capable radio communication network, a base station and a network therefor | |
| CN101340232A (en) | Transmission method and network appliance for multimedia broadcast multicast service | |
| CN102291834A (en) | Multi-input/multi-output resource scheduling method and base station | |
| CN102083122B (en) | Radio resource management method and wireless network controller | |
| CN106506109A (en) | Intensive small cell network user grouping and self-adapting interference suppression method | |
| CN101998410B (en) | Method and device for grouping space division multiple address (SDMA) users | |
| CN102394675B (en) | Base station and methods for selecting service mode and feeding back pre-coding matrix | |
| CN101989894A (en) | Cooperative communication method, equipment and system | |
| KR102102060B1 (en) | Method for Scheduling for Grant-free Multiple Access and User equipment | |
| JP5091257B2 (en) | Method and apparatus for reduced interference in cellular access systems | |
| CN102970685B (en) | Method and device for performing space division multiple access user grouping |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: INST OF TELECOMMUNICATION SCIENCE AND TECHNOLGOY Free format text: FORMER OWNER: DATANG MOBILE COMMUNICATION EQUIPMENT CO., LTD. Effective date: 20110422 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100083 NO. 29, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING TO: 100191 NO. 40, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20110422 Address after: 100191 Haidian District, Xueyuan Road, No. 40, Applicant after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100083 Haidian District, Xueyuan Road, No. 29, Applicant before: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210528 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |