CN102036391A - Uplink MU-MIMO (multiple user multiple-input multiple-output) transmission method and base station based on terminal service level - Google Patents
Uplink MU-MIMO (multiple user multiple-input multiple-output) transmission method and base station based on terminal service level Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0268—Traffic management, e.g. flow control or congestion control using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
Abstract
The invention relates to an uplink MU-MIMO (multiple user multiple-input multiple-output) transmission method and base station based on a terminal service level. The method comprises: determining the time delay requirement of the service level of a terminal and/ or the terminal service to be transmitted by the base station; according to the service level/ or time delay requirements, distributing a dataflow index selected from a dataflow index sequence for the terminal; and decoding the dataflow which is transmitted according to the dataflow index by a terminal and is used for bearing the terminal service. In the invention, the service level of the terminal and the time delay requirement of the terminal service to be transmitted are comprehensively considered; according to the service level of the terminal and/ or the terminal service to be transmitted, the corresponding dataflow index is distributed for the terminal; according to the dataflow index sequence, the dataflow bearing the terminal service is decoded, and the jointed dispatching of the base station and the terminal is combined to adjust a base station receiver to decode the time delay of different types of dataflow, thus improving the user experience degrees of various services with different service level terminals.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of up MU-MIMO (Multiple User Multiple-Input Multiple-Output, multi-user's multiple-input and multiple-output) transmission method and base station based on the Terminal Service grade.
Background technology
Multiple-input and multiple-output (Multiple-Input Multiple-Output, MIMO) technology is meant and utilizes many transmit antennas and Duo Gen reception antenna to carry out the technology of wireless transmission, studies show that, mimo system can improve power system capacity and spectrum efficiency greatly, and not need with the running time-frequency resource be cost.In order to bring into play the benefit that the MIMO technology is brought, (Space Multiplexing SM) is MIMO mode commonly used at present to spatial reuse.Space multiplexing technique is to send simultaneously different data flow on different antennae, and each data flow do not use redundant transmission, and the scattering abundant in the receiving terminal utilization will send a kind of technology that Signal Separation is come out.Space multiplexing technique be divided into single user spatial reuse (Single User-MIMO, SU-MIMO) and multi-user's spatial reuse (Multiple User-MIMO, MU-MIMO).
Multi-user's spatial reuse can be divided into up and descending again, descending MU-MIMO is meant that a plurality of data flow that the base station will take identical running time-frequency resource send to different terminals, different with descending MU-MIMO, up MU-MIMO is a virtual mimo system, be that each terminal all sends a data flow, but two or more data stream take identical running time-frequency resource, from receiver, these data flow from different terminals then can be counted as the data flow from different antennae on the same terminal, thereby constitute a mimo system, compare with SU-MIMO, MU-MIMO can obtain multi-user diversity gain, promptly for SU-MIMO, all MIMO signals are all from the antenna on the same terminal, and for MU-MIMO, its signal is to come from different terminals, than the independence of the easier acquisition interchannel of SU-MIMO.
Be the multiplexing performance of room for promotion, and consider the implementation complexity of receiver that (Successive Interference Cancellation, SIC) technology is used interference eliminated usually continuously.In the SIC receiver, data flow is by continuous demodulation sign indicating number.In case first data flow is by demodulation, its meeting that influences is to received signal estimated and is deducted, and can improve the ability of receiver demodulation follow-up data stream thus.Event data stream is by correct demodulation sign indicating number, and the channel estimating of receiver is enough accurate, and first data flow can effectively be estimated the interference of other data flow so.Then, receiver can from the revision received signal second data flow of demodulation.This process can continue, up to each data flow all by demodulation.Because data flow is by continuous demodulation sign indicating number, cause thus between the decoding of first and last data flow, having sizable time-delay.Rough estimate, under the situation of N data flow, the time-delay of last data flow of decoding is N a times of first data flow time-delay of decoding.
For up MU-MIMO, the corresponding data flow of common each terminal, the SIC receiver of base station side need be according to particular order demodulation sign indicating number successively corresponding to the data flow of each terminal, as previously mentioned, must cause the decoding time delay difference of each terminal thus, thereby cause each terminal use's experience difference.And there is the division to the Terminal Service grade in present most of communication system, and the terminal that requires usually to have the higher grade of service is enjoyed higher priority of service, that is to say, the base station needs the preferential user experience that guarantees high grade of service terminal.On the other hand, may there be multiple business to be transmitted simultaneously in each terminal, for example the networking telephone, net along browse, FTP downloads etc., and these business are also different to the requirement of time delay.Therefore, in order to guarantee the user experience of miscellaneous service, need take all factors into consideration the grade of service of terminal and the time delay demand of terminal traffic.
Summary of the invention
Main purpose of the present invention is to provide a kind of up MU-MIMO transmission method and base station based on the Terminal Service grade, is intended to adjust the time delay of base station receiver decoding different data streams, improves user experience.
In order to achieve the above object, the present invention proposes a kind of uplink multi-users multiple-input and multiple-output MU-MIMO transmission method based on the Terminal Service grade, comprising:
The grade of service of terminal and/or the time delay demand of terminal business to be transmitted are determined in the base station;
According to the grade of service of described terminal and/or the time delay demand of terminal business to be transmitted, the stream index of from the stream index sequence, selecting for terminal distribution; Wherein, described stream index sequence is arranged according to the decode sequencing of described data flow of base station receiver;
The described terminal of decoding is according to the data flow of this terminal traffic of carrying of the described stream index transmission that distributes.
Preferably, the described grade of service and/or the time delay demand of the terminal business to be transmitted step that is the stream index selected of terminal distribution from the stream index sequence according to terminal comprises:
When the grade of service of each terminal is inequality, be each terminal distribution stream index according to the grade of service of terminal; Perhaps when the grade of service of each terminal is identical, be each terminal distribution stream index according to the time delay demand of terminal business to be transmitted; The described stream index of distributing is carried at the terminal that sends to correspondence in the control signaling.
Preferably, the described grade of service according to terminal comprises for each terminal distribution stream index: being the preferential stream index of decoding of the terminal distribution of the high grade of service, is the stream index of the terminal distribution time preferential decoding of the low grade of service.
Preferably, described time delay demand according to terminal business to be transmitted comprises for each terminal distribution stream index: being the preferential stream index of decoding of the terminal distribution with strict time delay demand, is the stream index with terminal distribution time preferential decoding of time strict time delay demand.
Preferably, described decoding terminal comprises according to the step of the data flow of this terminal traffic of carrying of the described stream index transmission that distributes:
Reception comprises the composite signal of described terminal according to the data flow of described control signaling transmission;
According to the described stream index sequence respective stream of data of decoding successively.
Preferably, described control signaling also carries the decoding time delay information of data flow.
Preferably, described terminal is selected corresponding transport service according to default stream index and the mapping relations of decoding time delay and the time delay demand of terminal business to be transmitted from business to be transmitted.
Preferably, described terminal is chosen the service bearer to be transmitted that decoding time delay demand is not less than described decoding time delay according to the decoding time delay of data flow and be transferred to described base station in data flow from business to be transmitted.
Preferably, described terminal up link works in the MU-MIMO transmission mode, sends upstream data on identical running time-frequency resource.
Preferably, described time delay demand is meant decoding time delay demand, and strict time delay demand is meant low decoding time delay demand.
The present invention also proposes a kind of up MU-MIMO transmission base station based on the Terminal Service grade, comprising:
Grade of service acquisition module is used for determining the grade of service of terminal and/or the time delay demand of terminal business to be transmitted;
The stream index distribution module, being used for according to the grade of service of described terminal and/or the time delay demand of terminal business to be transmitted is the stream index that terminal distribution is selected from the stream index sequence; Wherein, described stream index sequence is arranged according to the decode sequencing of described data flow of base station receiver;
The data flow decoder module, the data flow of described terminal according to this terminal traffic of carrying of the described stream index transmission that distributes is used to decode.
Preferably, described stream index distribution module comprises:
The stream index allocation units are used for when the grade of service of each terminal is inequality, are each terminal distribution stream index according to the grade of service of terminal; Perhaps when the grade of service of each terminal is identical, be each terminal distribution stream index according to the time delay demand of terminal business to be transmitted;
Stream index transmitting element, the described stream index that is used for distributing are carried at the control signaling and send to corresponding terminal.
Preferably, described data flow decoder module comprises:
Signal receiving unit is used to receive the composite signal that comprises the data flow that described terminal sends according to the control signaling;
The data flow decoding unit is used for according to the described stream index sequence respective stream of data of decoding successively.
Preferably, described control signaling also carries the decoding time delay information of data flow.
Preferably, described terminal is selected corresponding transport service according to default stream index and the mapping relations of decoding time delay and the time delay demand of business to be transmitted from business to be transmitted.
A kind of up MU-MIMO transmission method and base station that the present invention proposes based on the Terminal Service grade, the grade of service by taking all factors into consideration terminal and the time delay demand of terminal business to be transmitted, according to the grade of service of terminal and/or the time delay demand of terminal business to be transmitted, be the corresponding stream index of terminal distribution, according to the stream index sequence to the carrying terminal traffic data flow decode, and in conjunction with the combined dispatching of base station and terminal, adjusted the time delay of base station receiver decoding different data streams, thereby improved the user experience of miscellaneous service with different grade of service terminals.
Description of drawings
Fig. 1 is the structure chart of the successive interference cancellation receiver that uses in the mimo system;
Fig. 2 is the up MU-MIMO transmission method one embodiment schematic flow sheet that the present invention is based on the Terminal Service grade;
Fig. 3 the present invention is based among up MU-MIMO transmission method one embodiment of Terminal Service grade the schematic flow sheet that time delay demand according to the grade of service of terminal and/or terminal business to be transmitted is the stream index selected of terminal distribution from the stream index sequence;
Fig. 4 is the schematic flow sheet that the present invention is based on the data flow of this terminal traffic of carrying that decoding terminal among up MU-MIMO transmission method one embodiment of Terminal Service grade sends according to the stream index of distributing;
Fig. 4 a the present invention is based on a kind of transmission means schematic diagram among up MU-MIMO transmission method one embodiment of Terminal Service grade;
Fig. 4 b the present invention is based on another kind of transmission means schematic diagram among up MU-MIMO transmission method one embodiment of Terminal Service grade;
Fig. 4 c the present invention is based on another transmission means schematic diagram among up MU-MIMO transmission method one embodiment of Terminal Service grade;
Fig. 5 is the up MU-MIMO transmission base station one example structure schematic diagram that the present invention is based on the Terminal Service grade;
Fig. 6 is the structural representation that the present invention is based on stream index distribution module among up MU-MIMO transmission base station one embodiment of Terminal Service grade;
Fig. 7 is the structural representation that the present invention is based on data flow decoder module among up MU-MIMO transmission base station one embodiment of Terminal Service grade.
In order to make technical scheme of the present invention clearer, clear, be described in further detail below in conjunction with accompanying drawing.
Embodiment
Solution for embodiment of the invention mainly is the time delay demand by the grade of service of taking all factors into consideration terminal and terminal business to be transmitted, according to the grade of service of terminal and/or the time delay demand of terminal business to be transmitted is the corresponding stream index of terminal distribution, according to the stream index sequence data flow of carrying terminal traffic is decoded, to adjust the time delay of base station receiver decoding different data streams, improve user experience.
At the 4th generation (4G) mobile communication standard, for example in the formulation process of IEEE 802.16m, LTE-A etc., up MU-MIMO mode has been adopted by normal structure as a kind of upstream multi-antenna transmission mode, to promote the throughput of cell-level.
As shown in Figure 1, the receiver input signal is the composite signal that each reception antenna receives, and supposes that the number of transmission data flow is N, and then receiver comprises N processing unit.Each processing unit (except last) comprises a data flow detection device, and an echo signal regenerates device and a summing unit.To be handled by each processing unit corresponding to each composite signal that receives branch, for example under the situation of OFDM (OFDM), handle respectively by each processing unit corresponding to each a plurality of sub-carrier signal that receive branch.Each processing unit is configured to detect target data stream from the composite signal of input, and obtain of contribution or the influence of this target data stream to composite signal by recovering the received signal corresponding with this target data stream, be of value to the data flow detection of subsequent treatment unit.In fact, each data flow that is successfully detected is received machine to be regarded as the not interference of detected data stream, and each processing unit is progressively eliminated this interference by deduct the echo signal of recovering again from the composite signal that receives.For example, processing unit 1 is after the detection of finishing the 1st data flow, the 1st data flow is admitted to the device that regenerates of echo signal simultaneously, and the output signal of this device is corresponding to the contribution of the 1st data flow to original composite signal, promptly to the influence of composite signal.Then, regenerate or the signal that recovers is deducted from the composite signal of input by summing unit, like this, corresponding to the interference of the 1st data flow then by deletion from original composite signal or cancellation.By using the output of processing unit 1 summing unit, this process is repeated, promptly the 2nd data stream is decoded by processing unit 2 data flow checkout gears, regenerating device corresponding to the interference signal of this data flow by processing unit 2 echo signals is resumed, then, the signal of recovery is deleted from the input signal of cascade by processing unit 2 summing units.This process is repeated, and is all decoded up to N data flow.In case the data flow checkout gear of the processed unit N of last data flow decoding then no longer needs to carry out the deletion of interference signal, what promptly no longer need echo signal regenerates device and summing unit.
Though spatial reuse and SIC receiver be combined in power system capacity and the data rate aspect provides extraordinary performance, and the complexity of receiver is not high yet, but the mode of this continuous detecting in the end a data flow decoded before, may cause serious time-delay.Yet, be that the data of target comprise several application-specific by making, and have the data flow of different time delay sensitivities with specific receiver, can alleviate the problem that causes by these time-delays.Concrete, for up and descending SU-MIMO transmission mode, base station or terminal can make the preferential decoded higher Business Stream of data flow carrying time delay sensitivity, for example real-time voice or video traffic, and make follow-up decoded data flow carry the lower Business Stream of time delay sensitivity, for example file transfer business; And for descending MU-MIMO transmission mode, terminal can optionally receive specific data stream to reduce time delay.Concrete, for up MU-MIMO transmission mode, introduce as preamble, because a plurality of data flow that with the base station receiver are target are normally from different terminals, and base station receiver all data flow of need decoding, this causes the decoding time delay difference corresponding to the data flow of different terminals, in addition, particular terminal may comprise one or more business to be transmitted, and different business has different time delay demands.By the grade of service of comprehensive consideration terminal and the time delay demand of described terminal business to be transmitted, and in conjunction with the combined dispatching of base station and terminal, can guarantee to have the user experience of the miscellaneous service of different grade of service terminals.
By certain mode, can accelerate the decoding of the 1st data flow.For example, when using iterative decoding, the code check of use is low more, and the iterations that needs is just few more, and the decoding time delay is just low more.The time of the 1st data flow needs is reduced if decode, and the time-delay of decode successive data flow also can reduce accordingly.
As shown in Figure 2, one embodiment of the invention proposes a kind of up MU-MIMO transmission method based on the Terminal Service grade, comprising:
Step S101, the grade of service of terminal and/or the time delay demand of terminal business to be transmitted are determined in the base station;
The grade of service is to be divided by the sequencing of base station services according to terminal, and each terminal is corresponding to a Terminal Service grade, and wherein, the terminal of the high grade of service is enjoyed high priority of service.
In the present embodiment, in order to adjust the time delay that base station receiver is decoded to each terminal data stream in the composite signal, the grade of service of each terminal of upstream data is at first determined to send in the base station on identical running time-frequency resource, the data flow of the high terminal of the grade of service is carried out preferential decoding processing; If have two or more Terminal Service grades identical in each terminal, the time delay demand that then needs the business to be transmitted of the identical terminal of definite grade of service, identical to the grade of service, but the data flow of the comparatively strict terminal of the time delay demand of transport service is carried out preferential decoding processing.
Step S102 is the stream index that terminal distribution is selected from the stream index sequence according to the grade of service of terminal and/or the time delay demand of terminal business to be transmitted;
Wherein, the stream index sequence is arranged according to the sequencing of base station receiver decoded data stream.
In this step, for the different terminal of the grade of service, be the terminal distribution stream index according to the grade of service of terminal, particularly, being the preferential stream index of decoding of the terminal distribution of the high grade of service, is the stream index of the terminal distribution time preferential decoding of the low grade of service; For the identical terminal of the grade of service, then according to the corresponding stream index of time delay demand assignment of terminal business to be transmitted, particularly, for having the preferential stream index of decoding of terminal distribution of strict time delay (low time delay) demand, be terminal distribution time preferential stream index of decoding with time strict time delay demand, and the like.
The base station is to send to corresponding terminal in the present embodiment in the alleged control signaling with the stream index information-bearing that distributes in the uplink scheduling control information, go back the decoding time delay information of portability base station receiver in this control signaling, terminal is according to the decoding time delay Information Selection corresponding to be transmitted business of control in the signaling, and is carried on and is transferred to the base station in the data flow.
As another kind of execution mode, the decoding time delay information that also can not carry base station receiver in the control signaling, under this kind situation, terminal can be according to the mapping relations of default stream index with the decoding time delay, select corresponding business to be transmitted, and be carried on and be transferred to the base station in the data flow.
Choosing to be transmittedly when professional, terminal is chosen the service bearer to be transmitted that decoding time delay demand is not less than the decoding time delay of data flow according to the decoding time delay of data flow and be transferred to the base station in data flow from business to be transmitted.Wherein, the decoding time delay demand decoding time delay that the is not less than data flow decoding time delay demand that is meant business to be transmitted is greater than (being higher than) or equal the decoding time delay of data flow.
Step S103, decoding terminal is according to the data flow of this terminal traffic of carrying of the stream index transmission that distributes.
After the base station receives the data flow that terminal sends, according to the stream index sequence respective stream of data of decoding successively.
As shown in Figure 3, step S102 comprises:
Step S1021 judges whether each Terminal Service grade is identical, if then enter step S1022; Otherwise, enter step S1023;
Step S1022 is each terminal distribution stream index according to the time delay demand of terminal business to be transmitted; Enter step S1024;
Step S1023 is each terminal distribution stream index according to the grade of service of terminal; Enter step S1024;
Step S1024 is carried at the stream index of distributing the terminal that sends to correspondence in the control signaling.
As shown in Figure 4, step S103 comprises:
Step S1031, reception comprises the composite signal of terminal according to the data flow of control signaling transmission;
Step S1032 is according to the corresponding data flow of stream index sequential decoding;
The stream index sequence is arranged according to the sequencing of base station receiver decoded data stream.
Wherein, described time delay demand is meant decoding time delay demand, and strict time delay demand is meant low decoding time delay demand.
With instantiation technical solution of the present invention is described in detail below:
Example one, the up MU-MIMO transmission of two terminals that the corresponding with service grade is inequality.
Shown in Fig. 4 a, terminal 1 is matched with terminal 2 and is realized up MU-MIMO transmission, be that terminal 1 sends data with terminal 2 on identical running time-frequency resource, terminal 1 has different Terminal Service grades with terminal 2, and the Terminal Service grade A of terminal 1 is higher than the Terminal Service grade B of terminal 2, in addition, terminal 1 is current to comprise 3 business to be transmitted, be respectively professional 1-1 to be transmitted, professional 1-2 to be transmitted and professional 1-3 to be transmitted, decoding time-delay demand is respectively 1 millisecond of (millisecond, ms), 2 milliseconds and 3 milliseconds, similarly, terminal 2 is current also to comprise 3 business to be transmitted, is respectively professional 2-1 to be transmitted, professional 2-2 to be transmitted and professional 2-3 to be transmitted, decoding time-delay demand is respectively 1 millisecond, 2 milliseconds and 3 milliseconds.
What suppose that the base station successive interference cancellation receiver at first decodes is the 1st data flow, and the decoding time-delay is 1 millisecond, and secondly decoding is the 2nd data flow, and the decoding time-delay is 2 milliseconds.
Step 1, base station determine that the grade of service of terminal 1 is A, and the grade of service of terminal 2 is B, and the grade of service of terminal 1 is higher than the grade of service of terminal 2.
Step 2, base station specified data stream index sequence be 1,2}, i.e. base station the 1st data flow of at first decoding, the 2nd data flow of decoding then.
Step 3, base station determine with terminal 1 corresponding data flow index be 1, with terminal 2 corresponding data flow index be 2, and notify terminal 1 and terminal 2 respectively.
The grade of service of terminal 1 is higher than the grade of service of terminal 2, in order to guarantee the priority of service of terminal 1, decoded at first stream index is distributed to terminal 1, and gives terminal 2 with the index assignment of follow-up decoded data flow.
Preferably, the base station sends to terminal 1 by uplink scheduling control information carrying stream index 1 information of the clean culture corresponding with terminal 1, and uplink scheduling control information carrying stream index 2 information by the clean culture corresponding with terminal 2 send to terminal 2.
Step 4, terminal 1 is obtained stream index 1 and stream index 2 information respectively with terminal 2.
Terminal when obtaining stream index information, the decoding time delay information of acquisition data flow that can also be direct or indirect; Wherein, directly acquisition is meant that the control signaling carries data flow decoding time delay information, obtains indirectly to be meant that the default stream index of terminal basis and the implicit expression mapping relations of decoding time delay obtain the time delay information of decoding.
Step 5, the index that terminal 1 use distributes are 1 data flow transmission professional 1-1 to be transmitted, and the index that terminal 2 uses distribute is 2 data flow transmission professional 2-2 to be transmitted.
For terminal 1, stream index is that the decoding time delay of 1 data flow is 1 millisecond, 3 professional 1-1 to be transmitted of terminal 1, the decoding time-delay demand of 1-2 and 1-3 is respectively 1 millisecond, 2 milliseconds and 3 milliseconds, its decoding time-delay demand is all more than or equal to the decoding time delay of data flow, promptly no matter which kind of business is terminal 1 transmit, and can both satisfy its decoding time-delay demand.
Hypothesis decoding time-delay demand is P more than or equal to the set of all business to be transmitted of the decoding time delay of data flow, be P={ professional 1-1 to be transmitted, professional 1-2 to be transmitted, professional 1-3} to be transmitted, the final business of selecting to be transmitted that is used for actual transmissions is for being contained in set P, and the business to be transmitted with the time-delay demand of the strictest (minimum), professional 1-1 promptly to be transmitted.
For terminal 2, stream index is that the decoding time delay of 2 data flow is 2 milliseconds, 3 professional 2-1 to be transmitted of terminal 2, the decoding time-delay demand of 2-2 and 2-3 is respectively 1 millisecond, 2 milliseconds and 3 milliseconds, decoding time-delay demand is professional 2-2 to be transmitted and professional 2-3 to be transmitted more than or equal to the business to be transmitted of data flow decoding time delay, and promptly terminal 2 has only transmission professional 2-2 to be transmitted and professional 2-3 to be transmitted, can satisfy corresponding decoding time-delay demand.
Hypothesis decoding time-delay demand is P more than or equal to the set of all business to be transmitted of the decoding time delay of data flow, be P={ professional 2-2 to be transmitted, professional 2-3} to be transmitted, the final business of selecting to be transmitted that is used for actual transmissions is for being contained in set P, and the business to be transmitted with the time-delay demand of the strictest (minimum), professional 2-2 promptly to be transmitted.
Example two, the up MU-MIMO transmission of two terminals that the corresponding with service grade is identical.
Shown in Fig. 4 b, terminal 1 is matched with terminal 2 and is realized up MU-MIMO transmission, be that terminal 1 sends data with terminal 2 on identical running time-frequency resource, terminal 1 has identical Terminal Service grade A with terminal 2, in addition, terminal 1 is current to comprise 3 business to be transmitted, be respectively professional 1-1 to be transmitted, professional 1-2 to be transmitted and professional 1-3 to be transmitted, its decoding time-delay demand is respectively 1 millisecond, 2 milliseconds and 3 milliseconds, similarly, terminal 2 is current also to comprise 3 business to be transmitted, is respectively professional 2-1 to be transmitted, professional 2-2 to be transmitted and professional 2-3 to be transmitted, decoding time-delay demand is respectively 2 milliseconds, 3 milliseconds and 4 milliseconds.
What suppose that the base station successive interference cancellation receiver at first decodes is the 1st data flow, and the decoding time-delay is 1 millisecond, and secondly decoding is the 2nd data flow, and the decoding time-delay is 2 milliseconds.
Step 1, base station determine that the terminal 1 and the grade of service of terminal 2 are A, and terminal 1 has identical Terminal Service grade with terminal 2, and the time delay demand of terminal 1 business to be transmitted is strict relatively more.
Step 2, base station specified data stream index sequence be 1,2}, i.e. base station the 1st data flow of at first decoding, the 2nd data flow of decoding then.
Step 3, base station determine with terminal 1 corresponding data flow index be 1, with terminal 2 corresponding data flow index be 2, and notify terminal 1 and terminal 2 respectively.
The grade of service of terminal 1 equals the grade of service of terminal 2, but the time delay demand of terminal 1 business to be transmitted is strict relatively more, for satisfying the time delay demand of terminal 1, give terminal 1 with the index assignment of decoded at first data flow, and the index assignment of will be follow-up decoded data flow is to terminal 2.
Preferably, the base station sends to terminal 1 by uplink scheduling control information carrying stream index 1 information of the clean culture corresponding with terminal 1, and uplink scheduling control information carrying stream index 2 information by the clean culture corresponding with terminal 2 send to terminal 2.
Step 4, terminal 1 is obtained stream index 1 and stream index 2 information respectively with terminal 2.
Terminal when obtaining stream index information, the decoding time delay information of acquisition data flow that can also be direct or indirect; Wherein, directly acquisition is meant that the control signaling carries data flow decoding time delay information, obtains indirectly to be meant that the default stream index of terminal basis and the implicit expression mapping relations of decoding time delay obtain the time delay information of decoding.
Step 5, the index that terminal 1 use distributes are 1 data flow transmission professional 1-1 to be transmitted, and the index that terminal 2 uses distribute is 2 data flow transmission professional 2-1 to be transmitted.
Stream index is that the decoding time delay of 1 data flow is 1 millisecond, 3 professional 1-1 to be transmitted of terminal 1, the decoding time-delay demand of 1-2 and 1-3 is respectively 1 millisecond, 2 milliseconds and 3 milliseconds, its decoding time-delay demand is all more than or equal to the decoding time delay of data flow, be which kind of business no matter terminal 1 transmit, can both satisfy its decoding time-delay demand.
Hypothesis decoding time-delay demand is P more than or equal to the set of all business to be transmitted of the decoding time delay of data flow, be P={ professional 1-1 to be transmitted, professional 1-2 to be transmitted, professional 1-3} to be transmitted, the final business of selecting to be transmitted that is used for actual transmissions is for being contained in set P, and the business to be transmitted with the time-delay demand of the strictest (minimum), professional 1-1 promptly to be transmitted.
Stream index is that the decoding time delay of 2 data flow is 2 milliseconds, 3 professional 2-1 to be transmitted of terminal 2, the decoding time-delay demand of 2-2 and 2-3 is respectively 2 milliseconds, 3 milliseconds and 4 milliseconds, its decoding time-delay demand is all more than or equal to the decoding time delay of data flow, promptly no matter which kind of business is terminal 2 transmit, and can both satisfy its decoding time-delay demand.
Hypothesis decoding time-delay demand is P more than or equal to the set of all business to be transmitted of the decoding time delay of data flow, be P={ professional 2-1 to be transmitted, professional 2-2 to be transmitted, professional 2-3} to be transmitted, the final business of selecting to be transmitted that is used for actual transmissions is for being contained in set P, and the business to be transmitted with the time-delay demand of the strictest (minimum), professional 2-1 promptly to be transmitted.
Embodiment three, the up MU-MIMO transmission of three terminals that corresponding with service grade part is identical.
Shown in Fig. 4 c, terminal 1, terminal 2 is divided into one group with terminal 3 and realizes up MU-MIMO transmission, it is terminal 1, terminal 2 sends data with terminal 3 on identical running time-frequency resource, the Terminal Service grade of terminal 1 is A, terminal 2 has identical Terminal Service grade B with terminal 3, and the Terminal Service grade A of terminal 1 is higher than the Terminal Service grade B of terminal 2 and terminal 3, in addition, terminal 1 is current to comprise 3 business to be transmitted, be respectively professional 1-1 to be transmitted, professional 1-2 to be transmitted and professional 1-3 to be transmitted, decoding time-delay demand is respectively 1 millisecond, 2 milliseconds and 3 milliseconds; Similarly, terminal 2 is current to comprise 2 business to be transmitted, is respectively professional 2-1 to be transmitted and professional 2-2 to be transmitted, decoding time-delay demand be respectively 3 milliseconds with 4 milliseconds; Similarly, terminal 3 is current to comprise 3 business to be transmitted, is respectively professional 3-1 to be transmitted, professional 3-2 to be transmitted and professional 3-3 to be transmitted, and decoding time-delay demand is respectively 1 millisecond, 2 milliseconds and 3 milliseconds.
What suppose that the base station successive interference cancellation receiver at first decodes is the 1st data flow, and the decoding time-delay is 1 millisecond, and secondly decoding is the 2nd data flow, and the decoding time-delay is 2 milliseconds, and decoding is the 3rd data flow at last, and the decoding time-delay is 3 milliseconds.
Step 1, base station determine that the grade of service of terminal 1 is A, and terminal 2 is B with the grade of service of terminal 3, and the grade of service of terminal 1 is higher than the Terminal Service grade of terminal 2 and terminal 3, and the relative terminal 2 of decoding time delay demand of terminal 3 business to be transmitted is strict more.
Step 2, base station specified data stream index sequence be 1,2,3}, i.e. base station the 1st data flow of at first decoding, the 2nd data flow of will decoding then, the 3rd data flow of just decoding at last.
Step 3, base station determine with terminal 1 corresponding data flow index be 1, with terminal 2 corresponding data flow index be 3, with terminal 3 corresponding data flow index be 2, and notify terminal 1 respectively, terminal 2 and terminal 3.
The grade of service of terminal 1 is higher than the grade of service of terminal 2 and terminal 3, is the priority of service that guarantees terminal 1, gives terminal 1 with the index assignment of decoded at first data flow, and gives terminal 2 and terminal 3 with the index assignment of inferior elder generation and last decoded data flow; The grade of service of terminal 2 equals the grade of service of terminal 3, but the time delay demand of terminal 3 business to be transmitted is strict relatively more, for satisfying the time delay demand of terminal 3, the index assignment of the data flow that inferior elder generation is decoded is given terminal 3, and the index assignment of data flow that will be at last decoded is given terminal 2.
Preferably, the base station sends to terminal 1 by uplink scheduling control information carrying stream index 1 information of the clean culture corresponding with terminal 1, uplink scheduling control information carrying stream index 2 information by the clean culture corresponding with terminal 2 send to terminal 2, and uplink scheduling control information carrying stream index 3 information by the clean culture corresponding with terminal 3 send to terminal 3.
Step 4, terminal 1, terminal 2 are obtained stream index 1, stream index 3 and stream index 2 information respectively with terminal 3.
Terminal when obtaining stream index information, the decoding time delay information of acquisition data flow that can also be direct or indirect; Wherein, directly acquisition is meant that the control signaling carries data flow decoding time delay information, obtains indirectly to be meant that the default stream index of terminal basis and the implicit expression mapping relations of decoding time delay obtain the time delay information of decoding.
Step 5, the index that terminal 1 use distributes are 1 data flow transmission professional 1-1 to be transmitted, and the index that terminal 2 uses distribute is 3 data flow transmission professional 2-1 to be transmitted, and the index of terminal 3 use distribution is 2 data flow transmission professional 3-2 to be transmitted.
Stream index is that the decoding time delay of 1 data flow is 1 millisecond, 3 professional 1-1 to be transmitted of terminal 1, the decoding time-delay demand of 1-2 and 1-3 is respectively 1 millisecond, 2 milliseconds and 3 milliseconds, its decoding time-delay demand is all more than or equal to the decoding time delay of data flow, promptly no matter transmit which kind of business, can both satisfy its decoding time-delay demand.
Hypothesis decoding time-delay demand is P more than or equal to the set of all business to be transmitted of the decoding time delay of data flow, be P={ professional 1-1 to be transmitted, professional 1-2 to be transmitted, professional 1-3} to be transmitted, the final business of selecting to be transmitted that is used for actual transmissions is for being contained in set P, and the business to be transmitted with the time-delay demand of the strictest (minimum), professional 1-1 promptly to be transmitted.
Stream index is that the decoding time delay of 2 data flow is 2 milliseconds, 3 professional 3-1 to be transmitted of terminal 3, the decoding time-delay demand of 3-2 and 3-3 is respectively 1 millisecond, 2 milliseconds and 3 milliseconds, decoding time-delay demand is professional 3-2 to be transmitted and professional 3-3 to be transmitted more than or equal to the business to be transmitted of data flow decoding time delay, promptly have only transmission professional 3-2 to be transmitted and professional 3-3 to be transmitted, can satisfy corresponding decoding time-delay demand.
Hypothesis decoding time-delay demand is P more than or equal to the set of all business to be transmitted of the decoding time delay of data flow, be P={ professional 3-2 to be transmitted, professional 3-3} to be transmitted, the final business of selecting to be transmitted that is used for actual transmissions is for being contained in set P, and the business to be transmitted with the time-delay demand of the strictest (minimum), professional 3-2 promptly to be transmitted.
Stream index is that the decoding time delay of 3 data flow is 3 milliseconds, 2 professional 2-1 to be transmitted of terminal 2 and the decoding time-delay demand of 2-2 be respectively 3 milliseconds with 4 milliseconds, its decoding time-delay demand is all more than or equal to the decoding time delay of data flow, promptly no matter transmit which kind of business, can both satisfy its decoding time-delay demand.
Hypothesis decoding time-delay demand is P more than or equal to the set of all business to be transmitted of the decoding time delay of data flow, be P={ professional 2-1 to be transmitted, professional 2-2} to be transmitted, the final business of selecting to be transmitted that is used for actual transmissions is for being contained in set P, and the business to be transmitted with the time-delay demand of the strictest (minimum), professional 2-1 promptly to be transmitted.
Need to prove, in the present embodiment, when terminal after the base station sends business to be transmitted, the base station comprises the composite signal of the data flow of carrying this terminal traffic with reception, and according to the stream index sequence respective stream of data of decoding successively.All terminal up links work in the MU-MIMO transmission mode, send upstream data on identical running time-frequency resource.
Indication business to be transmitted is meant the activating service that needs to send data in the present embodiment, and wherein, activating service is meant and is established, but not deleted as yet uplink service stream.Base station receiver includes but not limited to continuous interference eliminated (SIC) receiver.
The present embodiment terminal utilizes speed matching algorithm to realize the rate controlled of data flow; Wherein, rate-matched is a part that belongs to chnnel coding, to realize the transmission of packet on identical running time-frequency resource of different sizes.
Present embodiment by taking all factors into consideration terminal the grade of service and the time delay demand of described terminal business to be transmitted, and in conjunction with the combined dispatching of base station and terminal, thereby guaranteed to have the user experience of the various business to be transmitted of different grade of service terminals.
As shown in Figure 5, one embodiment of the invention proposes a kind of up MU-MIMO transmission base station based on the Terminal Service grade, comprising: grade of service acquisition module 501, stream index distribution module 502 and data flow decoder module 503, wherein:
Grade of service acquisition module 501 is used for determining the grade of service of terminal and/or the time delay demand of terminal business to be transmitted;
The grade of service is to be divided by the sequencing of base station services according to terminal, and each terminal is corresponding to a Terminal Service grade, and wherein, the terminal of the high grade of service is enjoyed high priority of service.
In the present embodiment, in order to adjust the time delay that base station receiver is decoded to each terminal data stream in the composite signal, the grade of service of each terminal of upstream data is at first determined to send in the base station on identical running time-frequency resource, the data flow of the high terminal of the grade of service is carried out preferential decoding processing; If have two or more Terminal Service grades identical in each terminal, the time delay demand that then needs the business to be transmitted of the identical terminal of definite grade of service, identical to the grade of service, but the data flow of the comparatively strict terminal of the time delay demand of transport service is carried out preferential decoding processing.
Stream index distribution module 502, being used for according to the grade of service of terminal and/or the time delay demand of terminal business to be transmitted is the stream index that terminal distribution is selected from the stream index sequence;
Wherein, the stream index sequence is arranged according to the sequencing of base station receiver decoded data stream.
In the present embodiment, for the different terminal of the grade of service, be the terminal distribution stream index according to the grade of service of terminal, particularly, being the preferential stream index of decoding of the terminal distribution of the high grade of service, is the stream index of the terminal distribution time preferential decoding of the low grade of service; For the identical terminal of the grade of service, then according to the corresponding stream index of time delay demand assignment of terminal business to be transmitted, particularly, for having the preferential stream index of decoding of terminal distribution of strict time delay (low time delay) demand, be terminal distribution time preferential stream index of decoding with time strict time delay demand, and the like.
The base station is to send to corresponding terminal in the present embodiment in the alleged control signaling with the stream index information-bearing that distributes in the uplink scheduling control information, go back the decoding time delay information of portability base station receiver in this control signaling, terminal is according to the decoding time delay Information Selection corresponding to be transmitted business of control in the signaling, and is carried on and is transferred to the base station in the data flow.
As another kind of execution mode, the decoding time delay information that also can not carry base station receiver in the control signaling, under this kind situation, terminal can be according to the mapping relations of default stream index with the decoding time delay, select corresponding business to be transmitted, and be carried on and be transferred to the base station in the data flow.
Selecting to be transmittedly when professional, terminal is chosen the service bearer to be transmitted that decoding time delay demand is not less than the decoding time delay of data flow according to the decoding time delay of data flow and be transferred to the base station in data flow from business to be transmitted.Wherein, the decoding time delay demand decoding time delay that the is not less than data flow decoding time delay demand that is meant business to be transmitted is greater than (being higher than) or equal the decoding time delay of data flow.
Data flow decoder module 503 is used for the data flow of decoding terminal according to this terminal traffic of carrying of the stream index transmission that distributes.
After the base station receives the data flow that terminal sends, according to the stream index sequence respective stream of data of decoding successively.
As shown in Figure 6, stream index distribution module 502 comprises: stream index allocation units 5021 and stream index transmitting element 5022, wherein:
Stream index allocation units 5021 are used for when the grade of service of each terminal is inequality, are each terminal distribution stream index according to the grade of service of terminal; Perhaps when the grade of service of each terminal is identical, be each terminal distribution stream index according to the time delay demand of terminal business to be transmitted;
Stream index transmitting element 5022, the stream index that is used for distributing are carried at the control signaling and send to corresponding terminal.
As shown in Figure 7, data flow decoder module 503 comprises:
Signal receiving unit 5033 is used to receive the composite signal that comprises the data flow that terminal sends;
Data flow decoding unit 5034 is used for according to the corresponding data flow of stream index sequential decoding.
Need to prove that in the present embodiment, all terminal up links work in the MU-MIMO transmission mode, send upstream data on identical running time-frequency resource.
Indication business to be transmitted is meant the activating service that needs to send data in the present embodiment, and wherein, activating service is meant and is established, but not deleted as yet uplink service stream.Base station receiver includes but not limited to continuous interference eliminated (SIC) receiver.
The present embodiment terminal utilizes speed matching algorithm to realize the rate controlled of data flow; Wherein, rate-matched is a part that belongs to chnnel coding, to realize the transmission of packet on identical running time-frequency resource of different sizes.
Further need to prove, each module in the foregoing description or each step can adopt the general calculation device to realize, can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, can also adopt the executable program code of calculation element to realize, thereby, it can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Therefore the present invention is not restricted to any specific hardware and software combination.
The embodiment of the invention provides up MU-MIMO transmission method and the base station based on the Terminal Service grade, the grade of service by taking all factors into consideration terminal and the time delay demand of terminal business to be transmitted, according to the grade of service of terminal and/or the time delay demand of terminal business to be transmitted, be the corresponding stream index of terminal distribution, according to stream index the data flow of carrying terminal traffic is decoded, and in conjunction with the combined dispatching of base station and terminal, adjusted the time delay of base station receiver decoding different data streams, thereby improved the user experience of miscellaneous service with different grade of service terminals.
The above only is the preferred embodiments of the present invention; be not so limit claim of the present invention; every equivalent structure or flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical field, all in like manner be included in the scope of patent protection of the present invention.
Claims (14)
1. the uplink multi-users multiple-input and multiple-output MU-MIMO transmission method based on the Terminal Service grade is characterized in that, comprising:
The grade of service of terminal and/or the time delay demand of terminal business to be transmitted are determined in the base station;
According to the grade of service of described terminal and/or the time delay demand of terminal business to be transmitted, the stream index of from the stream index sequence, selecting for terminal distribution; Wherein, described stream index sequence is arranged according to the decode sequencing of described data flow of base station receiver;
The described terminal of decoding is according to the data flow of this terminal traffic of carrying of the described stream index transmission that distributes.
2. method according to claim 1 is characterized in that, the described grade of service and/or the time delay demand of the terminal business to be transmitted step that is the stream index selected of terminal distribution from the stream index sequence according to terminal comprises:
When the grade of service of each terminal is inequality, be each terminal distribution stream index according to the grade of service of terminal; Perhaps when the grade of service of each terminal is identical, be each terminal distribution stream index according to the time delay demand of terminal business to be transmitted; The described stream index of distributing is carried at the terminal that sends to correspondence in the control signaling.
3. method according to claim 2, it is characterized in that, the described grade of service according to terminal comprises for each terminal distribution stream index: being the preferential stream index of decoding of the terminal distribution of the high grade of service, is the stream index of the terminal distribution time preferential decoding of the low grade of service.
4. method according to claim 2, it is characterized in that, described time delay demand according to terminal business to be transmitted comprises for each terminal distribution stream index: being the preferential stream index of decoding of the terminal distribution with strict time delay demand, is the stream index with terminal distribution time preferential decoding of time strict time delay demand.
5. method according to claim 1 is characterized in that, described decoding terminal comprises according to the step of the data flow of this terminal traffic of carrying of the described stream index transmission that distributes:
Reception comprises the composite signal of described terminal according to the data flow of described control signaling transmission;
According to the described stream index sequence respective stream of data of decoding successively.
6. method according to claim 2 is characterized in that, described control signaling also carries the decoding time delay information of data flow.
7. method according to claim 2 is characterized in that, described terminal is selected corresponding transport service according to default stream index and the mapping relations of decoding time delay and the time delay demand of terminal business to be transmitted from business to be transmitted.
8. according to claim 6 or 7 described methods, it is characterized in that described terminal is chosen the service bearer to be transmitted that decoding time delay demand is not less than described decoding time delay according to the decoding time delay of data flow and be transferred to described base station in data flow from business to be transmitted.
9. according to each described method among the claim 1-4, it is characterized in that described terminal up link works in the MU-MIMO transmission mode, sends upstream data on identical running time-frequency resource.
10. the up MU-MIMO transmission base station based on the Terminal Service grade is characterized in that, comprising:
Grade of service acquisition module is used for determining the grade of service of terminal and/or the time delay demand of terminal business to be transmitted;
The stream index distribution module, being used for according to the grade of service of described terminal and/or the time delay demand of terminal business to be transmitted is the stream index that terminal distribution is selected from the stream index sequence; Wherein, described stream index sequence is arranged according to the decode sequencing of described data flow of base station receiver;
The data flow decoder module, the data flow of described terminal according to this terminal traffic of carrying of the described stream index transmission that distributes is used to decode.
11. base station according to claim 10 is characterized in that, described stream index distribution module comprises:
The stream index allocation units are used for when the grade of service of each terminal is inequality, are each terminal distribution stream index according to the grade of service of terminal; Perhaps when the grade of service of each terminal is identical, be each terminal distribution stream index according to the time delay demand of terminal business to be transmitted;
Stream index transmitting element, the described stream index that is used for distributing are carried at the control signaling and send to corresponding terminal.
12. base station according to claim 10 is characterized in that, described data flow decoder module comprises:
Signal receiving unit is used to receive the composite signal that comprises the data flow that described terminal sends according to the control signaling;
The data flow decoding unit is used for according to the described stream index sequence respective stream of data of decoding successively.
13. base station according to claim 11 is characterized in that, described control signaling also carries the decoding time delay information of data flow.
14. base station according to claim 11 is characterized in that, described terminal is selected corresponding transport service according to default stream index and the mapping relations of decoding time delay and the time delay demand of business to be transmitted from business to be transmitted.
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| CN201010580587XA CN102036391A (en) | 2010-12-09 | 2010-12-09 | Uplink MU-MIMO (multiple user multiple-input multiple-output) transmission method and base station based on terminal service level |
| PCT/CN2011/074409 WO2012075780A1 (en) | 2010-12-09 | 2011-05-20 | Method and base station for uplink multiple user multiple input multiple output transmission based on service level of terminal |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102316068A (en) * | 2011-09-21 | 2012-01-11 | 中兴通讯股份有限公司 | Transmission method for control signalings and system |
| CN102316070A (en) * | 2011-09-21 | 2012-01-11 | 中兴通讯股份有限公司 | Data transmission method and device, and data processing method and device |
| WO2012075780A1 (en) * | 2010-12-09 | 2012-06-14 | 中兴通讯股份有限公司 | Method and base station for uplink multiple user multiple input multiple output transmission based on service level of terminal |
| WO2012159302A1 (en) | 2011-06-28 | 2012-11-29 | 华为技术有限公司 | Method, user equipment and base station for controlling uplink application layer service |
| CN105453681A (en) * | 2014-07-28 | 2016-03-30 | 华为技术有限公司 | A data scheduling method and apparatus |
| WO2016188147A1 (en) * | 2015-05-26 | 2016-12-01 | 中兴通讯股份有限公司 | Uplink mu-mimo transmission method and device, and storage medium |
| CN106341898A (en) * | 2015-07-09 | 2017-01-18 | 中兴通讯股份有限公司 | Multi-site transmission indicating, triggering, executing method and device |
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| CN102036391A (en) * | 2010-12-09 | 2011-04-27 | 中兴通讯股份有限公司 | Uplink MU-MIMO (multiple user multiple-input multiple-output) transmission method and base station based on terminal service level |
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| US6512929B1 (en) * | 1998-05-29 | 2003-01-28 | Koninklijke Philips Electronics N.V. | Telecommunication assembly |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012075780A1 (en) * | 2010-12-09 | 2012-06-14 | 中兴通讯股份有限公司 | Method and base station for uplink multiple user multiple input multiple output transmission based on service level of terminal |
| WO2012159302A1 (en) | 2011-06-28 | 2012-11-29 | 华为技术有限公司 | Method, user equipment and base station for controlling uplink application layer service |
| CN102316068A (en) * | 2011-09-21 | 2012-01-11 | 中兴通讯股份有限公司 | Transmission method for control signalings and system |
| CN102316070A (en) * | 2011-09-21 | 2012-01-11 | 中兴通讯股份有限公司 | Data transmission method and device, and data processing method and device |
| CN105453681A (en) * | 2014-07-28 | 2016-03-30 | 华为技术有限公司 | A data scheduling method and apparatus |
| WO2016188147A1 (en) * | 2015-05-26 | 2016-12-01 | 中兴通讯股份有限公司 | Uplink mu-mimo transmission method and device, and storage medium |
| CN106302268A (en) * | 2015-05-26 | 2017-01-04 | 中兴通讯股份有限公司 | A kind of method and device of uplink multi-users multiple-input and multiple-output MU-MIMO transmission |
| CN106341898A (en) * | 2015-07-09 | 2017-01-18 | 中兴通讯股份有限公司 | Multi-site transmission indicating, triggering, executing method and device |
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