CN104283644A - Data decoding method and equipment with uplink coordinated multiple points - Google Patents
Data decoding method and equipment with uplink coordinated multiple points Download PDFInfo
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- CN104283644A CN104283644A CN201410610812.8A CN201410610812A CN104283644A CN 104283644 A CN104283644 A CN 104283644A CN 201410610812 A CN201410610812 A CN 201410610812A CN 104283644 A CN104283644 A CN 104283644A
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- constellation point
- point information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0076—Distributed coding, e.g. network coding, involving channel coding
- H04L1/0077—Cooperative coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/345—Modifications of the signal space to allow the transmission of additional information
- H04L27/3461—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel
- H04L27/3483—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel using a modulation of the constellation points
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- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The invention provides data decoding method and equipment with uplink coordinated multiple points. The data decoding method comprises the following steps: a main district receives constellation point information from a cooperation district, wherein the data quantity of the constellation point information is smaller than that of uplink data received by the cooperation district; the main district carries out weighted combination on the constellation point information to obtain combined constellation point information; and the main district carries out demodulation and decoding on the combined constellation point information to obtain original information. With the adoption of the technical scheme of the invention, the data transmission cost between the main district and the cooperation district is reduced, the problem that the gain is lowered caused by decoding soft bits after being combined is solved.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of data decoding method and equipment of up collaborative multiple spot.
Background technology
The handling process of ascending physical signal Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH), comprises treatment step and the Output rusults in each stage, as shown in Figure 1.Main process is: input upstream data, carries out channel estimating and equalization operation and produces constellation point information, carry out demodulation produce soft bit to constellation point information, then carries out decoding to soft bit and obtain initial data.
Current Long Term Evolution (Long Term Evolution, LTE) up collaborative multiple spot (Coordinated Multiple Points, CoMP) in transmission technology, usual employing merges the method for upstream data, namely upstream data is passed to main plot (terminal persistent district) by cooperation cell, main plot is when signal equalization, and unified process upstream data reaches data and merges, and then sends into decoder and carries out decoding.Prior art is when two adjacent cooperation cell that single terminal is corresponding are all 2 antenna cells, and the transmission quantity of upstream data between cooperation cell and main plot of terminal is little; If but be all 8 antenna cells, or more cooperation cell transmit ascending data carries out data merging to main plot, then and the data volume transmitted is very huge, very high to the requirement of transmission system.
Another method be cooperation cell after demodulation descrambling, soft bit is passed to main plot, and main plot merged soft bit before decoding, then send into decoder carry out decoding.Cooperation cell demodulation descrambling produces soft bit and belongs to fixed-point calculation, has performance loss, and after main plot merges soft bit, the gain of main plot can not reach the set goal.
Summary of the invention
The invention provides a kind of data decoding method and equipment of up collaborative multiple spot, huge to the data volume of main plot to solve cooperation cell transmit ascending data, require high to transmission system, and main plot merged soft bit before decoding, the gain of main plot can not reach the problem of re-set target.
In order to solve the problem, the invention discloses a kind of data decoding method of up collaborative multiple spot, comprising:
Main plot receives the constellation point information from cooperation cell; Wherein, the data volume of described constellation point information is less than the data volume of the upstream data that described cooperation cell receives;
Described main plot is weighted merging to described constellation point information, obtains the constellation point information after merging;
Constellation point information after merging is carried out demodulation and decoding by described main plot, obtains raw information.
Preferably, described main plot receives the constellation point information from cooperation cell, comprising:
Described main plot, by the X2 interface transmission means between transmission means in base station or base station, receives the described constellation point information from cooperation cell.
Preferably, described main plot is weighted merging to described constellation point information, comprising:
Described main plot is weighted merging according to the signal-tonoise information of the signal-tonoise information of itself and described cooperation cell to the described constellation point information received from cooperation cell.
Preferably, the signal-tonoise information of described cooperation cell is be sent to described main plot by the X2 interface transmission means between transmission means in base station or base station.
Preferably, described upstream data is that described cooperation cell is at reception of eating dishes without rice or wine.
Correspondingly, the invention also discloses a kind of data decoding equipment of up collaborative multiple spot, comprising:
Receiver module, for receiving the constellation point information from cooperation cell; Wherein, the data volume of described constellation point information is less than the data volume of the upstream data that described cooperation cell receives;
Merging module, for being weighted merging to described constellation point information, obtaining the constellation point information after merging;
Decoding module, for the constellation point information after merging is carried out demodulation and decoding, obtains raw information.
Preferably, described receiver module, for by the X2 interface transmission means between transmission means in base station or base station, receives the constellation point information from cooperation cell.
Preferably, described merging module, for being weighted merging according to the signal-tonoise information of main plot and the signal-tonoise information of described cooperation cell to described constellation point information, obtains the constellation point information after merging;
Wherein, described main plot is corresponding with described cooperation cell.
Preferably, the signal-tonoise information of described cooperation cell is be sent to described merging module by the X2 interface transmission means between transmission means in base station or base station.
Preferably, described upstream data is that described cooperation cell is at reception of eating dishes without rice or wine.
Compared with background technology, the present invention includes following advantage:
First, main plot receives constellation point information from cooperation cell, instead of receives the upstream data that data volume is greater than constellation point information from cooperation cell, decreases the data transfer overhead between main plot and cooperation cell.
Secondly, main plot is weighted merging to constellation point information, and the constellation point information after being then combined is carried out decoding and obtained raw information, avoid adopt in background technology, soft bit is merged after carry out decoding again and the problem of gain reduction that causes.
Accompanying drawing explanation
Fig. 1 is up PUSCH process chart in background technology;
Fig. 2 is the data decoding method flow chart of a kind of up collaborative multiple spot in the embodiment of the present invention;
Fig. 3 is that in the embodiment of the present invention, soft bit merges the decoding performance after merging with constellation point and emulates schematic diagram;
Fig. 4 is that in the embodiment of the present invention, another soft bit merges the decoding performance after merging with constellation point and emulates schematic diagram;
Fig. 5 is the data decoding method flow chart of another kind of up collaborative multiple spot in the embodiment of the present invention;
Fig. 6 is the structural representation of the data decoding equipment of a kind of up collaborative multiple spot in the embodiment of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Below by data decoding method and the equipment of enumerating several specific embodiment and introduce in detail a kind of up collaborative multiple spot provided by the invention.
Embodiment one
Introduce the data decoding method of a kind of up collaborative multiple spot that the embodiment of the present invention provides in detail.
With reference to Fig. 2, show the data decoding method flow chart of a kind of up collaborative multiple spot in the embodiment of the present invention.
Step 100, main plot receives the constellation point information from cooperation cell.
Main plot in above-mentioned steps 100 and cooperation cell belong to and send up CoMP cell set corresponding to the terminal of upstream data, and up CoMP cell set corresponding to terminal can be determined by the measurement data of the information reporting of terminal and base station.
Multiple cooperation cell can receive the upstream data of same terminal, and main plot can receive the constellation point information from multiple cooperation cell.
Wherein, the data volume of described constellation point information is less than the data volume of the upstream data that described cooperation cell receives.
Illustrate:
The cooperation cell of 28 antennas, if cooperation cell sends upstream data to main plot, then upstream data is 30720*8=491520words, is about the transmission quantity of 500K words; If cooperation cell sends constellation point information to main plot, then constellation point information is 1200*12*2=28800words when maximum 100PRB dispatches, and is about the transmission quantity of 30K words, is only 1/16 of transmitting uplink data amount.
Step 102, described main plot is weighted merging to described constellation point information, obtains the constellation point information after merging.
Step 104, the constellation point information after merging is carried out demodulation and decoding by described main plot, obtains raw information.
If the soft bit after merging is carried out decoding by main plot, obtain raw information, from performance, the constellation point information after merging is carried out performance that decoding obtains raw information and be better than the soft bit after merging to carry out the performance that decoding obtains raw information.As shown in Figure 3 and Figure 4, abscissa in Fig. 3 and Fig. 4 is up signal to noise ratio, unit is dB, ordinate is throughput, unit is kbps, adopt the main plot merging constellation point information in Fig. 3 and adopt in received power difference 10dB, Fig. 4 of the main plot merging soft bit information and adopt the main plot merging constellation point information and the received power adopting the main plot merging soft bit information difference 30dB.
In sum, in the present embodiment:
First, main plot receives constellation point information from cooperation cell, instead of receives the upstream data that data volume is greater than constellation point information from cooperation cell, decreases the data transfer overhead between main plot and cooperation cell.
Secondly, main plot is weighted merging to constellation point information, and the constellation point information after being then combined is carried out decoding and obtained raw information, avoid adopt in background technology, soft bit is merged after carry out decoding again and the problem of gain reduction that causes.
Embodiment two
Introduce the data decoding method of a kind of up collaborative multiple spot that the embodiment of the present invention provides in detail.
With reference to Fig. 5, show the data decoding method flow chart of a kind of up collaborative multiple spot in the embodiment of the present invention.
Step 200, selects the corresponding up CoMP cell set of terminal.
Preferably, by the information reporting of terminal and the measurement data of base station, select the up CoMP cell set that this terminal is corresponding.
Cooperation cell and main plot can be comprised in the up CoMP cell set that this terminal is corresponding.
When the network planning, be CoMP cell set by current area and neighbouring several adjacent cell plannings.The foundation of the corresponding cooperation cell of certain terminal base station selected is the strongest adjacent cell of instruction in measuring according to the A3 of terminal to report, or adjacent cell is initiatively selected according to the positional information of terminal in base station.
Step 202, combined dispatching.
Preferably, combined dispatching is carried out in base station in up CoMP cell set.
Base station is all that terminal has reserved identical time-frequency domain resources in main plot and cooperation cell, and for the signal that receiving terminal is launched, this behavior is called combined dispatching.
Step 204, each community receives upstream data respectively.
Preferably, above-mentioned each community can be main plot and cooperation cell, can eat dishes without rice or wine in correspondence the upstream data of this terminal of reception respectively in main plot and cooperation cell.
It should be noted that, main plot must receive with a upstream data at identical time point with cooperation cell.
Step 206, each community is by calculating constellation point information and signal-tonoise information.
Step 208, judges whether each community is main plot.
If judge that community is cooperation cell, not main plot, then perform step 210; If judge that community is main plot, then perform step 212.
Step 210, constellation point information and signal-tonoise information are sent to main plot by cooperation cell.
Preferably, constellation point information and the signal-tonoise information in this terminal corresponding moment, by the X2 link transmission in base station or between base station, are sent to main plot by cooperation cell.
Step 212, main plot is weighted merging to constellation point information.
Preferably, the weighting that constellation point information is carried out according to the signal-tonoise information of cooperation cell and main plot itself or similar information in main plot merges, and obtains the constellation point information after merging.
Wherein, the information similar with signal-tonoise information can be: the absolute value of received power, the path loss of terminal in Liang Ge community, and, the disturbed condition etc. of Liang Ge community.
Step 214, the constellation point information after merging is carried out demodulation coding by main plot, obtains raw information.
The effect of demodulation is symbol transition constellation point information represented is bit information, decoding be by demodulation after bit information according to third generation partner program (The 3rd Generation Partnership Project, 3GPP) agreement carries out Turbo decoding, obtains original transmission bits information.
In sum, in the present embodiment:
First, main plot receives constellation point information from cooperation cell, instead of receives the upstream data that data volume is greater than constellation point information from cooperation cell, decreases the data transfer overhead between main plot and cooperation cell.
Secondly, main plot is weighted merging to constellation point information, and the constellation point information after being then combined is carried out decoding and obtained raw information, avoid adopt in background technology, soft bit is merged after carry out decoding again and the problem of gain reduction that causes.
Embodiment three
Introduce the data decoding equipment of a kind of up collaborative multiple spot that the embodiment of the present invention provides in detail.
With reference to Fig. 6, show the data decoding device structure schematic diagram of a kind of up collaborative multiple spot in the embodiment of the present invention.
The data decoding equipment of described a kind of up collaborative multiple spot can be positioned at main plot, and the data decoding equipment of described a kind of up collaborative multiple spot, specifically can comprise: receiver module 30, merges module 32 and decoding module 34.
Introduce the relation between the function of each module and each module below respectively in detail.
Described receiver module 30, for receiving the constellation point information from cooperation cell; Wherein, the data volume of described constellation point information is less than the data volume of the upstream data that described cooperation cell receives.Described upstream data can for described cooperation cell be at reception of eating dishes without rice or wine.
Preferably, described receiver module 30 by the X2 interface transmission means between transmission means in base station or base station, can receive the constellation point information from cooperation cell.
Described merging module 32, for being weighted merging to described constellation point information, obtains the constellation point information after merging.
Preferably, described merging module 32 can be weighted merging according to the signal-tonoise information of the signal-tonoise information of main plot and described cooperation cell to described constellation point information, obtains the constellation point information after merging.
Wherein, described main plot is corresponding with described cooperation cell, and the signal-tonoise information of described cooperation cell is the described merging module 32 being sent to main plot by the X2 interface transmission means between transmission means in base station or base station.
Described decoding module 34, also for the constellation point information after merging is carried out demodulation and decoding, obtains raw information.
In sum, the data decoding equipment of a kind of up collaborative multiple spot that the present embodiment provides for realizing the data decoding method of the up collaborative multiple spot in aforementioned multiple embodiment of the method, in the present embodiment:
First, receiver module receives constellation point information from cooperation cell, instead of receives the upstream data that data volume is greater than constellation point information from cooperation cell, decreases the data transfer overhead between receiver module and cooperation cell.
Secondly, merge module and merging is weighted to constellation point information, then decoding module be combined after constellation point information carry out decoding and obtain raw information, avoid adopt in background technology, soft bit is merged after carry out decoding again and the problem of gain reduction that causes.
For apparatus embodiments, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
Above to data decoding method and the equipment of a kind of up collaborative multiple spot that the embodiment of the present invention provides, be described in detail, apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a data decoding method for up collaborative multiple spot, is characterized in that, comprising:
Main plot receives the constellation point information from cooperation cell; Wherein, the data volume of described constellation point information is less than the data volume of the upstream data that described cooperation cell receives;
Described main plot is weighted merging to described constellation point information, obtains the constellation point information after merging;
Constellation point information after merging is carried out demodulation and decoding by described main plot, obtains raw information.
2. method according to claim 1, is characterized in that, described main plot receives the constellation point information from cooperation cell, comprising:
Described main plot, by the X2 interface transmission means between transmission means in base station or base station, receives the described constellation point information from cooperation cell.
3. method according to claim 1, is characterized in that, described main plot is weighted merging to described constellation point information, comprising:
Described main plot is weighted merging according to the signal-tonoise information of the signal-tonoise information of itself and described cooperation cell to the described constellation point information received from cooperation cell.
4. method according to claim 3, is characterized in that, the signal-tonoise information of described cooperation cell is be sent to described main plot by the X2 interface transmission means between transmission means in base station or base station.
5. method according to claim 1, is characterized in that, described upstream data is that described cooperation cell is at reception of eating dishes without rice or wine.
6. a data decoding equipment for up collaborative multiple spot, is characterized in that, comprising:
Receiver module, for receiving the constellation point information from cooperation cell; Wherein, the data volume of described constellation point information is less than the data volume of the upstream data that described cooperation cell receives;
Merging module, for being weighted merging to described constellation point information, obtaining the constellation point information after merging;
Decoding module, for the constellation point information after merging is carried out demodulation and decoding, obtains raw information.
7. equipment according to claim 6, is characterized in that,
Described receiver module, for by the X2 interface transmission means between transmission means in base station or base station, receives the constellation point information from cooperation cell.
8. equipment according to claim 6, is characterized in that,
Described merging module, for being weighted merging according to the signal-tonoise information of main plot and the signal-tonoise information of described cooperation cell to described constellation point information, obtains the constellation point information after merging;
Wherein, described main plot is corresponding with described cooperation cell.
9. equipment according to claim 8, is characterized in that, the signal-tonoise information of described cooperation cell is be sent to described merging module by the X2 interface transmission means between transmission means in base station or base station.
10. equipment according to claim 6, is characterized in that, described upstream data is that described cooperation cell is at reception of eating dishes without rice or wine.
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