CN101635950B - Method and device for determining positions of cell reference signals - Google Patents

Method and device for determining positions of cell reference signals Download PDF

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Publication number
CN101635950B
CN101635950B CN200910162634.6A CN200910162634A CN101635950B CN 101635950 B CN101635950 B CN 101635950B CN 200910162634 A CN200910162634 A CN 200910162634A CN 101635950 B CN101635950 B CN 101635950B
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csi
community
cell
cooperation cell
base station
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CN101635950A (en
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戴博
郁光辉
张峻峰
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ZTE Corp
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ZTE Corp
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J11/00Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023Interference mitigation or co-ordination
    • H04J11/005Interference mitigation or co-ordination of intercell interference
    • H04J11/0053Interference mitigation or co-ordination of intercell interference using co-ordinated multipoint transmission/reception
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035Resource allocation in a cooperative multipoint environment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • H04L5/0094Indication of how sub-channels of the path are allocated

Abstract

The invention provides a method and a device for determining positions of cell reference signals. The method comprises the following steps: selecting a plurality of coordinate cell positions for transmitting CSI-RS of the coordinate cells from the positions for transmitting channel state information reference signals (CSI-RS) in difference cells; and determining the positions of CSI-RS of the coordinate cells according to marks of the coordinate cells. By using the method, target UE defines a plurality of cell positions transmitting CSI-RS, thereby achieving the goal of using a base station for transmitting data by measuring channel state information of a plurality of cells and reporting the information to the base station so as to ensure the application of multi-point coordinate transmission and reception (CoMP) technique to improve the overall performance of the system.

Description

A kind of method and device determining positions of cell reference signals
Technical field
The present invention relates to Long Term Evolution (LTE, Long Term Evolution) technology, espespecially a kind of method and device determining positions of cell reference signals.
Background technology
OFDM (OFDM) technological essence is a kind of multi-carrier modulation communication technology, OFDM technology is one of core technology in forth generation mobile communication.On frequency domain, the multipath channel of OFDM presents frequency selective fading characteristic, in order to overcome this decline, channel is divided into multiple subchannel on frequency domain, spectral characteristic all near flat of every sub-channels, and each sub-channels of OFDM is mutually orthogonal.Therefore, allow the frequency spectrum of subchannel overlapped, thus very can utilize frequency spectrum resource to limits.
Multiple-input and multiple-output (MIMO) technology can increase power system capacity, improve transmission performance, and energy is fine and other physical-layer techniques merges, and therefore becomes the key technology of B3G and 4G mobile communication system.But when channel relevancy is strong, the diversity gain brought by multipath channel and spatial multiplexing gain reduce greatly, cause declining to a great extent of mimo system performance.In order to eliminate the impact of channel relevancy, mimo channel, as the efficient MIMO multiplex mode of one, is changed into multiple independently pseudo channel by the precoding processing of sending and receiving end, ensure that mimo system stability under circumstances by MIMO method for precoding.
LTE system is the essential planning of third generation partnership.Fig. 1 is LTE system Frequency Division Duplexing (FDD) (FDD, Frequency Division Duplex) pattern and time division duplex (TDD, Time Division Duplex) the frame structure schematic diagram of pattern, as shown in Figure 1, in the frame structure of fdd mode, the radio frames (radio frame) of a 10ms is 0.5ms by 20 length, time slot (slot) composition of numbering 0 ~ 19, time slot 2i and 2i+1 forms subframe (subframe) i that length is 1ms; In the frame structure of tdd mode, the radio frames (radio frame) of a 10ms is made up of two long fields (half frame) for 5ms, and a field comprises 5 long subframes (subframe) for 1ms.Subframe i is defined as 2 long time slot 2i and 2i+1 for 0.5ms.When system adopts conventional cyclic prefix, a time slot comprises the uplink/downlink symbol of 7 length; When system adopts extended cyclic prefix, a time slot comprises the uplink/downlink symbol of 6 length.The structural representation of the Physical Resource Block that Fig. 2 is the system bandwidth of LTE system when being 5MHz, as shown in Figure 2, a Resource Unit (RE, Resource Element) be a subcarrier in an OFDM symbol, and a downlink resource block (RB, Resource Block) be made up of continuous 12 subcarriers and continuous 7 (during extended cyclic prefix being 6) OFDM symbol, frequency domain is 180kHz, it time domain is the time span of a general time slot, when carrying out Resourse Distribute, be that base unit distributes with Resource Block.
LTE system supports that the MIMO of 4 antennas applies, corresponding antenna port #0, antenna port #1, antenna port #2 and antenna port #3 all adopt the publicly-owned reference signal in the community of full bandwidth (CRS, Cell-specificreference signals) mode.Fig. 3 a is in LTE system, when Cyclic Prefix is conventional cyclic prefix, and the schematic diagram of the position of publicly-owned reference signal in Physical Resource Block, community, these publicly-owned reference signal positions in Physical Resource Block are as shown in Figure 3 a; Fig. 3 b is in LTE system, when Cyclic Prefix is extended cyclic prefix, the schematic diagram of the position of publicly-owned reference signal in Physical Resource Block, community, these publicly-owned reference signal positions in Physical Resource Block as shown in Figure 3 b, in Fig. 3 a and Fig. 3 b, abscissa represents time domain, and ordinate represents frequency domain.In addition, also has the reference signal (UE-specific referencesignals) that a kind of user is proprietary, this reference signal is only transmitted on the time-frequency domain position at proprietary Physical Shared Channel (PDSCH, the Physical downlinkshared channel) place of user.The publicly-owned reference signal function in its small area comprises to be measured and down channel estimation (demodulation) down channel quality.
Senior LTE (LTE-Advanced, Further Advancements for E-UTRA) is the evolution version of LTERelease-8.Except to meet or more than 3GPP TR 25.913: except all related needs of " Requirements for EvolvedUTRA (E-UTRA) and Evolved UTRAN (E-UTRAN) ", also will meet or exceed the demand of IMT-Advanced that ITU-R proposes.Wherein, refer to the demand of LTE Release-8 backward compatibility: the terminal of LTE Release-8 can work in the network of LTE-Advanced; The terminal of LTE-Advanced can work in the network of LTE Release-8.
In addition, LTE-Advanced at the spectrum disposition of different size, should be able to work, to reach higher performance and Target peak rate under comprising the spectrum disposition (the continuous print frequency spectrum resource as 100MHz) wider than LTE Release-8.Because LTE-Advanced network needs to access LTE user, so its operational frequency bands needs to cover current LTE frequency band, and in this frequency range, there is not the spectral bandwidth of assignable continuous 100MHz.Therefore, LTE-Advanced needs the direct technology solved to be that several distribution continuous component carrier frequency on different frequency bands (Component carrier) i.e. spectrum aggregating is got up to be formed the operable 100MHz bandwidth of LTE-Advanced.Namely for the frequency spectrum after gathering, be divided into n component carrier frequency, the frequency spectrum in each component carrier frequency is continuous print.
The descending application can supporting at most 8 antennas of LTE-Advanced, and LTE-Advanced is as the application of support 8 antenna and coordinated multipoint transmission and reception (CoMP, Coordinated multiple pointtransmission and reception), the design basic framework (Way forward) of LTE-Advanced downlink reference signal under the use of the technology such as double fluid (Beamforming), the downlink reference signal operated LTE-Advanced is defined as the reference signal of two types: towards the reference signal of PDSCH demodulation with towards channel condition information (CSI, Channel Status Information) reference signal that produces.
CoMP technical spirit is the expansion of multi-antenna technology, the base station of multiple community is worked in coordination with and is sent data to target terminal user (UE), therefore, object UE needs to know that multiple community sends the position of the reference signal (CSI-RS) of CSI, like this, UE could measure multiple cell channel state information and report base station, to make base station send for data, thus realizes CoMP technology.
At present, also not about the scheme determining CSI-RS position, multiple community, so, The present invention gives the sending method that a kind of positions of cell reference signals is determined, thus, ensure that the application of CoMP technology, reach the target improving entire system performance;
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method determining positions of cell reference signals, can ensure the application of CoMP technology, improves entire system performance target.
Another object of the present invention is to provide a kind of device determining positions of cell reference signals, the application of CoMP technology can be ensured, improve entire system performance target.
For achieving the above object, technical scheme of the present invention is achieved in that
Determine a method for positions of cell reference signals, the method comprises:
Determine the position of the reference signal CSI-RS of the channel condition information of community, user equipment (UE) is according to the multiple cell channel state information of the position measurement of CSI-RS and report base station.
Described community is cooperation cell; Describedly determine that the position of the reference signal CSI-RS of the channel condition information of community comprises:
From the position of reference signal CSI-RS that can be used as the channel condition information sending different districts, select the several position, cooperation cell for transmitting each cooperation cell CSI-RS;
According to the mark of each cooperation cell, determine the position of each cooperation cell CSI-RS.
The described current sequence of positions that can be used as the CSI-RS sending different districts is numbered k 1, k 2..., k n, described selection comprises for several position, cooperation cell of transmitting each cooperation cell CSI-RS:
M the position of described transmission m community CSI-RS is k h, k h+1..., k h+m-1; A described m position is continuous print;
Wherein, m represents each cooperation cell, and h is fixed value or for pre-setting.
When described h is fixed value, its value is 0, or n-m;
Wherein, n represents the current number that can be used as the position of the CSI-RS sending different districts.
When described h is for pre-setting, the value of described h passes through signaling object UE by base station.
Described selection comprises for several position, cooperation cell of transmitting each cooperation cell CSI-RS:
That chooses m position to all n position is combined into line number, correspondence numeral index r that described any m position is all unique, corresponding m the position that each numeral index r is unique;
According to the position of m community CSI-RS, base station selection numeral index sends to object UE;
Object UE is according to the numeral index r received, and the corresponding relation of numeral index r and position, obtains m positional information;
Wherein, n represents the current number that can be used as the position of the CSI-RS sending different districts; M represents each cooperation cell.
The described current sequence of positions that can be used as the CSI-RS sending different districts is numbered k 1, k 2..., k n, m the position chosen is , wherein, 1≤s k≤ n, s k< s k+1;
Described numeral index <math> <mrow> <mi>r</mi> <mo>=</mo> <munderover> <mi>&amp;Sigma;</mi> <mrow> <mi>k</mi> <mo>=</mo> <mn>0</mn> </mrow> <mrow> <mi>m</mi> <mo>-</mo> <mn>1</mn> </mrow> </munderover> <mfenced open='&lt;' close='&gt;'> <mtable> <mtr> <mtd> <mi>n</mi> <mo>-</mo> <msub> <mi>s</mi> <mi>k</mi> </msub> </mtd> </mtr> <mtr> <mtd> <mi>m</mi> <mo>-</mo> <mi>k</mi> </mtd> </mtr> </mtable> </mfenced> <mo>,</mo> </mrow></math> r = 0 , . . . , n m - 1 , Wherein, the definition of binomial coefficient is expanded: <math> <mrow> <mfenced open='&lt;' close='&gt;'> <mtable> <mtr> <mtd> <mi>x</mi> </mtd> </mtr> <mtr> <mtd> <mi>y</mi> </mtd> </mtr> </mtable> </mfenced> <mo>=</mo> <mfenced open='{' close=''> <mtable> <mtr> <mtd> <mfenced open='(' close=')'> <mtable> <mtr> <mtd> <mi>x</mi> </mtd> </mtr> <mtr> <mtd> <mi>y</mi> </mtd> </mtr> </mtable> </mfenced> </mtd> <mtd> <mi>x</mi> <mo>&amp;GreaterEqual;</mo> <mi>y</mi> </mtd> </mtr> <mtr> <mtd> <mn>0</mn> </mtd> <mtd> <mi>x</mi> <mo>&lt;</mo> <mi>y</mi> </mtd> </mtr> </mtable> </mfenced> <mo>,</mo> </mrow></math> x y Represent the number of combinations C getting y numerical value in x different numerical value x y.
The numeral index r of m the position of described m community CSI-RS by base station by signalling to object UE.
M signalling is passed through, the CSI-RS position of each denoting signaling community in m the position of described m community CSI-RS.
Determine that the position of each cooperation cell CSI-RS comprises: according to the order of m the cell ID that base station sends, determine the position of community CSI-RS;
Or, according to cell ID large young pathbreaker described in m ranking cells, determine the position of community CSI-RS according to the position after sequence.
The order of described m the cell ID according to base station transmission, determine that the position of community CSI-RS specifically comprises:
When described certain community ID is when the order that m cell ID sends is g, the position of the CSI-RS that this community is corresponding is g position in a described m position.
According to cell ID large young pathbreaker described in m ranking cells, according to sequence after position determine that the position of community CSI-RS specifically comprises:
When described certain community ID position is in the ranking g, the position of the CSI-RS that this community is corresponding is g position in a described m position.
Describedly determine that the position of each cooperation cell CSI-RS is k ((cell_ID+x) mod m), wherein, Cell_ID is cell ID, and m represents each cooperation cell; Mod is complementation symbol;
X is fixed value, or the value of x passes through signaling object UE by base station.
Determine a device for positions of cell reference signals, comprise and select module and determination module, wherein,
Selecting module, for from the position that can be used as the CSI-RS sending different districts, selecting the several position, cooperation cell for transmitting each cooperation cell CSI-RS;
Determination module, for the mark according to each cooperation cell, determines the position of each cooperation cell CSI-RS.
For each community in described community, CSI-RS all in this community is arranged on one or two orthogonal frequency division multiplex OFDM symbols of a subframe;
Described community is single community or cooperation cell.
When described subframe adopts conventional cyclic prefix, described OFDM symbol is one or two OFDM symbol in second, the 3rd, the 4th OFDM symbol of second time slot in subframe;
When described subframe adopts extended cyclic prefix, described OFDM symbol is one or two OFDM symbol in second, the 3rd OFDM symbol of second time slot in subframe.
When described CSI-RS sends on identical physical sub-carrier with the reference signal of antenna port #5, only send described CSI-RS;
When described CSI-RS sends on identical physical sub-carrier with the data sending to the Physical Shared Channel of R8 version terminal to carry, only send described CSI-RS;
The Physical Shared Channel of the above terminal of R8 version is sent to not map on the subcarrier of described CSI-RS place.
Base station, according to the CSI-RS position of described each cooperation cell, sends the mark of each cooperation cell according to respective sequence.
As can be seen from the technical scheme that the invention described above provides, determine the position of the reference signal CSI-RS of the channel condition information of community, user equipment (UE) is according to the multiple cell channel state information of the position measurement of CSI-RS and report base station.When community is cooperation cell, from the position that can be used as the CSI-RS sending different districts, select the several position, cooperation cell for transmitting each cooperation cell CSI-RS; According to the mark of each cooperation cell, determine the position of each cooperation cell CSI-RS.Pass through the inventive method, object UE specify that multiple community sends the position of CSI reference signal, like this, reach UE measure multiple cell channel state information and report base station, with the object making base station send for data, thus ensure that the application of CoMP technology, reach the target improving entire system performance.
Accompanying drawing explanation
Fig. 1 is the frame structure schematic diagram of LTE system fdd mode and tdd mode;
The structural representation of the Physical Resource Block that Fig. 2 is the system bandwidth of LTE system when being 5MHz;
Fig. 3 a is in LTE system, when Cyclic Prefix is conventional cyclic prefix, and the schematic diagram of the position of publicly-owned reference signal in Physical Resource Block, community;
Fig. 3 b is in LTE system, when Cyclic Prefix is extended cyclic prefix, and the schematic diagram of the position of publicly-owned reference signal in Physical Resource Block, community;
Fig. 4 is the flow chart that the present invention determines the method for reference signal position, cooperation cell;
Fig. 5 is the composition structural representation that the present invention determines the device of reference signal position, cooperation cell.
Embodiment
Determine the position of the reference signal CSI-RS of the channel condition information of community, user equipment (UE) is according to the multiple cell channel state information of the position measurement of CSI-RS and report base station.
Fig. 4 is the flow chart that the present invention determines the method for reference signal position, cooperation cell, as shown in Figure 4, comprising:
Step 400: from the position that can be used as the CSI-RS sending different districts, select the several position, cooperation cell for transmitting each cooperation cell CSI-RS.
Suppose, the current sequence of positions that can be used as the CSI-RS sending different districts is numbered k1, k2 ..., kn, CoMP concentrate relevant community ID to be ID1, ID2 ..., IDm, wherein, m, n are integer.
In this step, the several position, cooperation cell for transmitting each cooperation cell CSI-RS is selected to be specially:
A kind of implementation method is: m the position of transmission m community CSI-RS is k h, k h+1..., k h+m-1, this m position is a continuous print m position.Wherein, h is fixed value, such as 0 or n-m etc.; Or h is what pre-set, its value passes through signaling object UE by base station.
Another kind of implementation method is: that chooses m position to all n position is combined into line number, and ensure correspondence numeral index that any m position is all unique, according to the position of m community CSI-RS, base station selection numeral index sends to object UE; Object UE is according to the numeral index received, and the corresponding relation of numeral index and position, obtains m positional information.
Suppose, m the position chosen is , 1≤s k≤ n, s k< s k+1, so, numeral index r is as shown in formula (1):
<math> <mrow> <mi>r</mi> <mo>=</mo> <munderover> <mi>&amp;Sigma;</mi> <mrow> <mi>k</mi> <mo>=</mo> <mn>0</mn> </mrow> <mrow> <mi>m</mi> <mo>-</mo> <mn>1</mn> </mrow> </munderover> <mfenced open='&lt;' close='&gt;'> <mtable> <mtr> <mtd> <mi>n</mi> <mo>-</mo> <msub> <mi>s</mi> <mi>k</mi> </msub> </mtd> </mtr> <mtr> <mtd> <mi>m</mi> <mo>-</mo> <mi>k</mi> </mtd> </mtr> </mtable> </mfenced> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow></math>
Like this, numeral index r = 0 , . . . , n m - 1 , Wherein, the definition of binomial coefficient is expanded as shown in formula (2):
<math> <mrow> <mfenced open='&lt;' close='&gt;'> <mtable> <mtr> <mtd> <mi>x</mi> </mtd> </mtr> <mtr> <mtd> <mi>y</mi> </mtd> </mtr> </mtable> </mfenced> <mo>=</mo> <mfenced open='{' close=''> <mtable> <mtr> <mtd> <mfenced open='(' close=')'> <mtable> <mtr> <mtd> <mi>x</mi> </mtd> </mtr> <mtr> <mtd> <mi>y</mi> </mtd> </mtr> </mtable> </mfenced> </mtd> <mtd> <mi>x</mi> <mo>&amp;GreaterEqual;</mo> <mi>y</mi> </mtd> </mtr> <mtr> <mtd> <mn>0</mn> </mtd> <mtd> <mi>x</mi> <mo>&lt;</mo> <mi>y</mi> </mtd> </mtr> </mtable> </mfenced> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>)</mo> </mrow> </mrow></math>
In formula (2), x y Represent the number of combinations Cxy getting y numerical value in x different numerical value.
The numeral index of m position of transmission m community CSI-RS by base station by signaling to UE.M signalling is passed through, the CSI-RS position of each denoting signaling community in m the position of m community CSI-RS.
Step 401: according to the mark of each cooperation cell, determines the position of each cooperation cell CSI-RS.
The specific implementation of this step has following two kinds of methods:
First method, according to the order of m the cell ID that base station sends, that is, the order of m the cell ID that UE receives, determines the position of community CSI-RS.Such as: community IDi is g in the order that m cell ID sends, so, the position of the CSI-RS of its correspondence is g position in a described m position.
Base station (eNB) needs the CSI-RS position according to m community, sends m cell ID according to respective sequence;
Second method, according to cell ID large young pathbreaker described in m ranking cells, determine the position of community CSI-RS according to the position after sequence.Such as: the position of community IDi in above-mentioned sequence is g, so, the position of the CSI-RS of its correspondence is g position in a described m position.
Except the method shown in Fig. 3, the present invention also provides a kind of method determining cell reference signals.
First, from the position that can be used as the CSI-RS sending different districts, the several position, cooperation cell for transmitting each cooperation cell CSI-RS is selected.
Then, suppose, the current position that can be used as the CSI-RS sending different districts is k1, k2 ..., kn, CoMP concentrate relevant community ID to be ID1, ID2 ..., IDm, wherein, m, n are integer; Cell ID is Cell_ID, and the position of the CSI-RS of its correspondence is k ((cell_ID+x) mod m), wherein, mod is complementation symbol; X is fixed value, such as 0 etc.; Or the value of x passes through signaling object UE by base station.
The all CSI-RS in community is arranged in one or two OFDM symbol of a subframe.Here, community refers to single community or cooperation cell.
When subframe adopts conventional cyclic prefix, described OFDM symbol is one or two OFDM symbol in second, the 3rd, the 4th OFDM symbol of second time slot in subframe;
When subframe adopts extended cyclic prefix, described OFDM symbol is one or two OFDM symbol in second, the 3rd OFDM symbol of second time slot in subframe.
When CSI-RS sends with the reference signal of antenna port #5 on identical physical sub-carrier, only send CSI-RS, not the reference signal of transmitting antenna port #5, namely destroy the reference signal of antenna port #5 on (Drop) described subcarrier.
When the data sending to the Physical Shared Channel of R8 version terminal to carry send with CSI-RS on identical physical sub-carrier, only send CSI-RS, do not send the data of described Physical Shared Channel carrying;
The Physical Shared Channel of the above terminal of R8 version is sent to not map on the subcarrier of CSI-RS place.
By the inventive method, specify that the position of cell reference signals, thus ensure that the application of CoMP technology, reach the target improving entire system performance.
For the inventive method, also provide a kind of device determining positions of cell reference signals, Fig. 5 is the composition structural representation that the present invention determines the device of cooperation cell reference signal, as shown in Figure 5, comprises and selects module and determination module, wherein,
Selecting module, for from the position that can be used as the CSI-RS sending different districts, selecting the several position, cooperation cell for transmitting each cooperation cell CSI-RS.
Determination module, for the mark according to each cooperation cell, determines the position of each cooperation cell CSI-RS.
Carry out citing below in conjunction with embodiment to the inventive method to describe.
First embodiment, supposes that the current CSI-RS position that can be used as sending different districts is k1, k2 ..., kn, CoMP concentrate relevant cell ID to be ID1, ID2, ..., IDm, (m < n, and, ID1 < ID2 < ... < IDm), so, the CSI-RS position of community IDi is k (h+i), wherein, and 1≤i≤m, h, m, n are integer.
That is, concentrated by all CoMP community to sort according to the size of cell ID, be then mapped to successively on corresponding available CSI-RS position according to the order after sequence.
Wherein, h is fixed value, such as 0 or n-m etc.; Or, the value of h by base station by signaling to object UE.
Second embodiment, suppose the order receiving cell ID according to UE, CoMP concentrates relevant cell ID to be ID1, ID2 ..., IDm, the current CSI-RS position that can be used as sending different districts is k1, k2 ..., kn, so, the CSI-RS position of community IDi is k (h+i), wherein, 1≤i≤m, h, m, n are integer.
Wherein, h is fixed value, such as 0 or n-m etc.; Or, the value of h by base station by signaling to object UE.
Base station (eNB) needs the CSI-RS position according to m community, sends m cell ID according to respective sequence;
3rd embodiment, expansion binomial coefficient is defined as <math> <mrow> <mfenced open='&lt;' close='&gt;'> <mtable> <mtr> <mtd> <mi>x</mi> </mtd> </mtr> <mtr> <mtd> <mi>y</mi> </mtd> </mtr> </mtable> </mfenced> <mo>=</mo> <mfenced open='{' close=''> <mtable> <mtr> <mtd> <mfenced open='(' close=')'> <mtable> <mtr> <mtd> <mi>x</mi> </mtd> </mtr> <mtr> <mtd> <mi>y</mi> </mtd> </mtr> </mtable> </mfenced> </mtd> <mtd> <mi>x</mi> <mo>&amp;GreaterEqual;</mo> <mi>y</mi> </mtd> </mtr> <mtr> <mtd> <mn>0</mn> </mtd> <mtd> <mi>x</mi> <mo>&lt;</mo> <mi>y</mi> </mtd> </mtr> </mtable> </mfenced> <mo>.</mo> </mrow></math> Suppose, m the position chosen is , 1≤s k≤ n, s k< s k+1, so, numeral index <math> <mrow> <mi>r</mi> <mo>=</mo> <munderover> <mi>&amp;Sigma;</mi> <mrow> <mi>k</mi> <mo>=</mo> <mn>0</mn> </mrow> <mrow> <mi>m</mi> <mo>-</mo> <mn>1</mn> </mrow> </munderover> <mfenced open='&lt;' close='&gt;'> <mtable> <mtr> <mtd> <mi>n</mi> <mo>-</mo> <msub> <mi>s</mi> <mi>k</mi> </msub> </mtd> </mtr> <mtr> <mtd> <mi>m</mi> <mo>-</mo> <mi>k</mi> </mtd> </mtr> </mtable> </mfenced> <mo>,</mo> </mrow></math> I.e. numeral index r = 0 , . . . , n m - 1 .
Its decoding process is as follows:
Input parameter is r, and after decoding, output parameter is
The first step: x is set min=1; K=0;
Second step: x=x min, <math> <mrow> <mi>p</mi> <mo>=</mo> <mfenced open='&lt;' close='&gt;'> <mtable> <mtr> <mtd> <mi>n</mi> <mo>-</mo> <mi>x</mi> </mtd> </mtr> <mtr> <mtd> <mi>m</mi> <mo>-</mo> <mi>k</mi> </mtd> </mtr> </mtable> </mfenced> <mo>;</mo> </mrow></math>
3rd step: judge whether p > r sets up, if set up, x=x+1, <math> <mrow> <mi>p</mi> <mo>=</mo> <mfenced open='&lt;' close='&gt;'> <mtable> <mtr> <mtd> <mi>N</mi> <mo>-</mo> <mi>x</mi> </mtd> </mtr> <mtr> <mtd> <mi>m</mi> <mo>-</mo> <mi>k</mi> </mtd> </mtr> </mtable> </mfenced> <mo>,</mo> </mrow></math> Return execution
3rd step; If be false, perform the 4th step;
4th step: s is set k=x, x min=s k+ 1, r=r-p;
5th step: judge that k equals m-1 and whether sets up, if set up, exports , terminate decode procedure; If be false, k=k+1 is set, returns execution second step.
First, that chooses m position to all n position is combined into line number, ensure correspondence numeral index r that any m position is all unique, according to the position of m community CSI-RS, base station selection numeral index r sends to object UE, object UE is according to receiving numeral index r, and the corresponding relation of numeral index r and position, obtains m positional information.
Then, UE, according to the order of the m a received cell ID, determines the position of community CSI-RS.That is, community IDi is g at m cell ID sending order, then, the position of the CSI-RS of its correspondence is g position in a described m position.
Base station (eNB) needs the CSI-RS position according to m community, sends m cell ID according to respective sequence;
Or,
According to cell ID large young pathbreaker described in m ranking cells, determine the position of community CSI-RS according to the position after sequence; That is, the position of community IDi in above-mentioned sequence is g, then, the position of the CSI-RS of its correspondence is g position in a described m position.
4th embodiment, supposes that CoMP concentrates relevant cell ID to be ID1, ID2 ..., IDm, the current CSI-RS position that can be used as sending different districts is k1, k2 ..., kn, so, the CSI-RS position of community IDi is k ((IDi+x) mod m)(1≤i≤m), x, m, n are integer.Wherein, x is fixed value, such as 0 or n-m etc.; Or the value of x passes through signaling by base station.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention, and all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (16)

1. determine a method for positions of cell reference signals, it is characterized in that, the method comprises:
Determine the position of the reference signal CSI-RS of the channel condition information of community, user equipment (UE) is according to the multiple cell channel state information of the position measurement of CSI-RS and report base station;
Described community is cooperation cell; Describedly determine that the position of the reference signal CSI-RS of the channel condition information of community comprises:
From the position of reference signal CSI-RS that can be used as the channel condition information sending different districts, select the several position, cooperation cell for transmitting each cooperation cell CSI-RS;
Described from the position of reference signal CSI-RS that can be used as the channel condition information sending different districts, select the several position, cooperation cell for transmitting each cooperation cell CSI-RS to comprise:
The current sequence of positions that can be used as the CSI-RS sending different districts is numbered k 1, k 2..., k n;
M the position of transmission m community CSI-RS is k h, k h+1..., k h+m-1; A described m position is continuous print;
Wherein, m, n are integer, and m represents each cooperation cell, and h is fixed value or for pre-setting;
Or that chooses m position to all n position is combined into line number, correspondence numeral index r that any m position is all unique, corresponding m the position that each numeral index r is unique;
According to the position of m community CSI-RS, base station selection numeral index sends to object UE;
Object UE is according to the numeral index r received, and the corresponding relation of numeral index r and position, obtains m positional information;
Wherein, n represents the current number that can be used as the position of the CSI-RS sending different districts; M represents each cooperation cell;
According to the mark of each cooperation cell, determine the position of each cooperation cell CSI-RS.
2. method according to claim 1, is characterized in that, when described h is fixed value, its value is 1, or n-m;
Wherein, n represents the current number that can be used as the position of the CSI-RS sending different districts.
3. method according to claim 1, is characterized in that, when described h is for pre-setting, the value of described h passes through signaling object UE by base station.
4. method according to claim 1, is characterized in that, described from the position of reference signal CSI-RS that can be used as the channel condition information sending different districts, selects the several position, cooperation cell for transmitting each cooperation cell CSI-RS to comprise:
The current sequence of positions that can be used as the CSI-RS sending different districts is numbered k 1, k 2..., k n, m the position chosen is wherein, m, n are integer, 1≤s k≤ n, s k< s k+1;
Described numeral index r = 0 , . . . , n m - 1 , Wherein, the definition of binomial coefficient is expanded: x y Represent the number of combinations of getting y numerical value in x different numerical value
5. method according to claim 1, is characterized in that, the numeral index r of m the position of described m community CSI-RS by base station by signalling to object UE.
6. method according to claim 1, is characterized in that, m signalling is passed through, the CSI-RS position of each denoting signaling community in m the position of m community CSI-RS.
7. method according to claim 1, is characterized in that, determines that the position of each cooperation cell CSI-RS comprises: according to the order of m the cell ID that base station sends, determine the position of community CSI-RS;
Or, according to cell ID large young pathbreaker described in m ranking cells, determine the position of community CSI-RS according to the position after sequence.
8. method according to claim 7, is characterized in that, the order of described m the cell ID according to base station transmission, determines that the position of community CSI-RS specifically comprises:
When certain community ID is when the order that m cell ID sends is g, the position of the CSI-RS that this community is corresponding is g position in a described m position.
9. method according to claim 7, is characterized in that, according to cell ID large young pathbreaker described in m ranking cells, according to sequence after position determine that the position of community CSI-RS specifically comprises:
When ID position in the ranking in certain community is g, the position of the CSI-RS that this community is corresponding is g position in a described m position.
10. method according to claim 1, is characterized in that, describedly determines that the position of each cooperation cell CSI-RS is k ((cell_ID+x) modm), wherein, Cell_ID is cell ID, and m represents each cooperation cell; Mod is complementation symbol;
X is fixed value, or the value of x passes through signaling object UE by base station.
11. 1 kinds of devices determining positions of cell reference signals, is characterized in that, comprise and select module and determination module, wherein,
Select module, for being numbered k in the current sequence of positions that can be used as the CSI-RS sending different districts 1, k 2..., k ntime, m the position of transmission m community CSI-RS is k h, k h+1..., k h+m-1; A described m position is continuous print;
Wherein, m, n are integer, and m represents each cooperation cell, and h is fixed value or for pre-setting;
Or, be combined into line number, correspondence numeral index r that any m position is all unique, corresponding m the position that each numeral index r is unique for what choose m position to all n position;
According to the position of m community CSI-RS, base station selection numeral index sends to object UE;
Object UE is according to the numeral index r received, and the corresponding relation of numeral index r and position, obtains m positional information;
Wherein, n represents the current number that can be used as the position of the CSI-RS sending different districts; M represents each cooperation cell;
Determination module, for the mark according to each cooperation cell, determines the position of each cooperation cell CSI-RS.
12. devices according to claim 11, is characterized in that, for each community in described different districts, CSI-RS all in this community is arranged on one or two orthogonal frequency division multiplex OFDM symbols of a subframe;
Described community is single community or cooperation cell.
13. devices according to claim 12, is characterized in that, when described subframe adopts conventional cyclic prefix, described OFDM symbol is one or two OFDM symbol in second, the 3rd, the 4th OFDM symbol of second time slot in subframe;
When described subframe adopts extended cyclic prefix, described OFDM symbol is one or two OFDM symbol in second, the 3rd OFDM symbol of second time slot in subframe.
14. devices according to claim 12, is characterized in that,
When described CSI-RS sends on identical physical sub-carrier with the reference signal of antenna port #5, only send described CSI-RS.
15. devices according to claim 12, is characterized in that,
When described CSI-RS sends on identical physical sub-carrier with the data sending to the Physical Shared Channel of R8 version terminal to carry, only send described CSI-RS;
The Physical Shared Channel of the above terminal of R8 version is sent to not map on the subcarrier of described CSI-RS place.
16. devices according to claim 11, is characterized in that, this device also comprises:
Base station, according to the CSI-RS position of described each cooperation cell, sends the mark of each cooperation cell according to respective sequence.
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Families Citing this family (68)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101635950B (en) * 2009-08-14 2015-06-10 中兴通讯股份有限公司 Method and device for determining positions of cell reference signals
CN102036264B (en) 2009-09-30 2013-12-04 华为技术有限公司 Method and device for measuring channel of cell
WO2011096646A2 (en) 2010-02-07 2011-08-11 Lg Electronics Inc. Method and apparatus for transmitting downlink reference signal in wireless communication system supporting multiple antennas
KR101241916B1 (en) * 2010-02-07 2013-03-11 엘지전자 주식회사 A method for transmitting downlink reference signal in multi-carrier supporting wireless communication system and an apparatus for the same
CN102668629B (en) * 2010-02-11 2014-12-10 上海贝尔股份有限公司 Super -physical-resource-block-based method and apparatus for determining shift modes of channel state information reference signal
US8923203B2 (en) * 2010-02-12 2014-12-30 Blackberry Limited Reference signal for a coordinated multi-point network implementation
EP2534857B1 (en) 2010-02-12 2019-05-22 BlackBerry Limited Reference signal for a coordinated multi-point network implementation
KR101498079B1 (en) * 2010-03-04 2015-03-03 엘지전자 주식회사 Apparatus of transmitting and receiving signal in distributed antenna system
WO2011115421A2 (en) * 2010-03-17 2011-09-22 Lg Electronics Inc. Method and apparatus for providing channel state information-reference signal (csi-rs) configuration information in a wireless communication system supporting multiple antennas
CN102209388B (en) * 2010-03-30 2016-06-01 中兴通讯股份有限公司 The sending method of a kind of channel measurement pilot frequency information and device
CN105162508B (en) 2010-04-01 2018-05-29 Lg电子株式会社 The method and apparatus of transceiver channel status information reporting in wireless access system
EP2557834B1 (en) * 2010-04-05 2018-03-21 NTT DoCoMo, Inc. Base station device, mobile station device and reference signal transmission method
CN102215198A (en) * 2010-04-09 2011-10-12 中兴通讯股份有限公司 Orthogonal method and device of channel measurement pilot frequencies in different cells
US9136997B2 (en) * 2010-05-04 2015-09-15 Qualcomm Incorporated Methods and apparatuses for using channel state information reference signals
US8995465B2 (en) 2010-05-04 2015-03-31 Qualcomm Incorporated Reference signal patterns
KR101790505B1 (en) * 2010-06-01 2017-11-21 주식회사 골드피크이노베이션즈 Apparatus and Method for allocating Channel State Information-Reference Signal dependent on Subframe Configuration in wireless communication
CN102281635B (en) * 2010-06-10 2014-02-05 电信科学技术研究院 Measurement pilot frequency sending method and device and measurement pilot frequency receiving method and device
CN102291744A (en) * 2010-06-17 2011-12-21 中兴通讯股份有限公司 Channel state information reference signal sending and processing method and device
JP5373706B2 (en) * 2010-06-21 2013-12-18 株式会社エヌ・ティ・ティ・ドコモ Base station apparatus, mobile terminal apparatus and communication control method
CN102340801B (en) * 2010-07-14 2014-06-11 中国移动通信集团公司 Method for determining reference signal (RS) position and equipment thereof
CN102340379B (en) * 2010-07-15 2015-04-22 中国移动通信集团公司 CSI-RS (Channel Status Information-Reference Signal) transmission method and detection method, and devices of CSI-RS transmission method and detection method
CN102347821B (en) * 2010-08-02 2014-04-02 华为技术有限公司 Information indicating and processing methods, devices and communication system
JP4938117B2 (en) * 2010-08-16 2012-05-23 株式会社エヌ・ティ・ティ・ドコモ Signaling method, base station apparatus, mobile terminal apparatus and radio communication system
CN102131225B (en) * 2010-08-16 2013-04-17 华为技术有限公司 Method and device for measuring state information of data channel
CN102378270B (en) * 2010-08-16 2015-12-09 上海贝尔股份有限公司 For determining the method for reference signal pattern
CN102404689B (en) * 2010-09-13 2015-08-12 电信科学技术研究院 Receive and send the method and apparatus of CSI-RS configuration information
CN102438312B (en) * 2010-09-29 2015-06-03 中兴通讯股份有限公司 Mobile communication system and CSI-RS (channel state indication reference signal) configuring method thereof
WO2012040877A1 (en) * 2010-09-30 2012-04-05 Nokia Siemens Networks Oy Reference signals in a communication system
JP4987113B2 (en) * 2010-10-04 2012-07-25 株式会社エヌ・ティ・ティ・ドコモ Base station apparatus, mobile terminal apparatus and communication control method
JP5005082B2 (en) * 2010-10-04 2012-08-22 株式会社エヌ・ティ・ティ・ドコモ Base station apparatus, mobile terminal apparatus and communication control method
KR101488734B1 (en) * 2010-10-05 2015-02-03 노키아 솔루션스 앤드 네트웍스 오와이 Channel state information measurement and reporting
CN102469489B (en) * 2010-11-08 2015-03-25 大唐移动通信设备有限公司 Method and device for reporting channel quality indicator (CQI)
CN102045762B (en) * 2010-12-02 2013-07-24 大唐移动通信设备有限公司 Method and device for reporting channel state
CN103229539A (en) * 2011-02-12 2013-07-31 富士通株式会社 Method for measuring channel state information (csi), user equipment (ue) and base station
CN102647751B (en) * 2011-02-17 2014-12-10 上海贝尔股份有限公司 Method for determining channel state in coordinative multiple point transmission
CN102684850B (en) * 2011-03-11 2017-07-04 夏普株式会社 Channel state information feedback method, user equipment and base station
CN102694622B (en) * 2011-03-25 2017-06-27 中兴通讯股份有限公司 The signaling methods and system of a kind of measuring assembly
US9998944B2 (en) * 2011-04-29 2018-06-12 Intel Corporation System and method of channel control in a wireless communication system
CN105323041B (en) * 2011-07-12 2019-06-07 华为技术有限公司 A kind of cell measuring method, local resource sharing method and relevant device
CN102891710B (en) * 2011-07-20 2015-12-02 华为技术有限公司 A kind of method and device obtaining channel condition information
CN102291764A (en) * 2011-08-05 2011-12-21 电信科学技术研究院 Method, system and equipment for configuring and reporting measurement information
CN103650403B (en) * 2011-08-10 2018-01-19 富士通株式会社 Report method, user equipment and the base station of channel condition information
CN103139905B (en) * 2011-11-29 2016-07-13 华为技术有限公司 The method and apparatus that subscriber equipment is positioned
KR101873596B1 (en) * 2012-01-16 2018-08-02 삼성전자주식회사 Method and apparatus for transmitting data in wireless communication system
CN102571284B (en) * 2012-01-19 2014-12-24 新邮通信设备有限公司 Channel measuring method for LTE (Long Term Evolution) system
KR20140135700A (en) * 2012-02-10 2014-11-26 엘지전자 주식회사 Method and apparatus for taking measurements on neighboring cells in wireless communication systems
CN102573061B (en) * 2012-03-07 2015-09-30 华为技术有限公司 Assist the localization method under multicast communication scene, device and base station
CN103312439B (en) * 2012-03-13 2018-04-27 中兴通讯股份有限公司 The processing method and processing device of channel state information reference signals
WO2013139026A1 (en) * 2012-03-22 2013-09-26 Alcatel Lucent Channel state information feedbacks for coordinated multipoint transmissions
US8767581B2 (en) * 2012-03-28 2014-07-01 Sharp Laboratories Of America, Inc. Coordinated multipoint (CoMP) radio resource management (RRM) measurement
EP2837103B1 (en) 2012-04-12 2017-03-01 Nokia Solutions and Networks Oy Three-dimensional beamforming in a mobile communications network
CN102685795B (en) * 2012-04-18 2015-08-05 新邮通信设备有限公司 The collocation method that a kind of RRM RRM measures
CN103384388B (en) * 2012-05-04 2016-08-10 华为技术有限公司 Determine main plot home site method, measuring method, method for sending information and device
CN103535065B (en) * 2012-05-11 2017-11-28 华为技术有限公司 Measure method, the network equipment and the user equipment reported
CN103428759A (en) * 2012-05-15 2013-12-04 中兴通讯股份有限公司 Measuring result identification method, user equipment and network side
CN103491523B (en) * 2012-06-11 2016-09-28 华为技术有限公司 Method and the communication terminal of CSI-RS information are provided
JP5743965B2 (en) * 2012-06-26 2015-07-01 株式会社Nttドコモ User terminal, radio communication system, radio communication method, and radio base station
CN102790974B (en) * 2012-07-20 2015-01-28 东南大学 Base station optimal position selection method in CoMP (coordinated multi-point) system network planning
US9106386B2 (en) * 2012-08-03 2015-08-11 Intel Corporation Reference signal configuration for coordinated multipoint
CN103780291B (en) * 2012-10-25 2017-04-19 华为技术有限公司 Method, device and base station by using three-dimensional beam codebooks to perform communication
CN104105210B (en) * 2013-04-15 2018-03-30 电信科学技术研究院 A kind of method and apparatus for carrying out CoMP transmission
WO2015047333A1 (en) * 2013-09-27 2015-04-02 Intel Corporation Csi-rs antenna ports extension and 3d codebook design
WO2017020183A1 (en) * 2015-07-31 2017-02-09 Nec Corporation Method and apparatus for performing radio resource measurement
WO2017045571A1 (en) * 2015-09-17 2017-03-23 中兴通讯股份有限公司 Reference signal transmission method and device, receiving method and device
WO2017096524A1 (en) * 2015-12-08 2017-06-15 Telefonaktiebolaget Lm Ericsson (Publ) Coordinated multi-point (comp) transmission from a comp cluster
CN107689855A (en) * 2016-08-05 2018-02-13 电信科学技术研究院 Signal sending, receiving method and equipment
CN107809799A (en) * 2016-09-08 2018-03-16 北京信威通信技术股份有限公司 A kind of method and device for sending physical channel reference signal
CN108023697A (en) * 2016-11-03 2018-05-11 华为技术有限公司 A kind of resource indicating method, relevant device and system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008126623A1 (en) * 2007-03-20 2008-10-23 Ntt Docomo, Inc. User device, base station device, and method in mobile communication system
CN101505180A (en) * 2009-03-17 2009-08-12 中兴通讯股份有限公司 CSI reference signal bearing method and apparatus in long term evolution system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101635950B (en) * 2009-08-14 2015-06-10 中兴通讯股份有限公司 Method and device for determining positions of cell reference signals

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008126623A1 (en) * 2007-03-20 2008-10-23 Ntt Docomo, Inc. User device, base station device, and method in mobile communication system
CN101505180A (en) * 2009-03-17 2009-08-12 中兴通讯股份有限公司 CSI reference signal bearing method and apparatus in long term evolution system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEC Group.On the role of Rel-8 cell-specific RS as CSI-RS for LTE-A.《On the role of Rel-8 cell-specific RS as CSI-RS for LTE-A》.2009,第2.2.3节. *

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