CN101867949B - Mapping method of channel measurement pilot frequency and physical resource block - Google Patents

Mapping method of channel measurement pilot frequency and physical resource block Download PDF

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Publication number
CN101867949B
CN101867949B CN200910134981.8A CN200910134981A CN101867949B CN 101867949 B CN101867949 B CN 101867949B CN 200910134981 A CN200910134981 A CN 200910134981A CN 101867949 B CN101867949 B CN 101867949B
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China
Prior art keywords
antenna port
pilot frequency
channel measurement
measurement pilot
subcarrier
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CN200910134981.8A
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CN101867949A (en
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姜静
孙云锋
朱常青
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ZTE Corp
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ZTE Corp
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Priority to CN200910134981.8A priority Critical patent/CN101867949B/en
Priority to PCT/CN2010/071930 priority patent/WO2010121541A1/en
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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
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Abstract

The invention discloses a mapping method of a channel measurement pilot frequency and a physical resource block, which are applied in an advanced long-term evolution system, and comprises the following step that: the base station is provided with one or a plurality of antenna ports adopting a common pilot frequency specified in the long-term evolution system to be as the channel measurement pilot frequency, and is provided with the channel measure pilot frequencies of other antenna parts to avoid the mapping positions of the common pilot frequency and downlink dedicated pilot frequency in the long-term evolution system. The invention can save system overhead, and can not cause large influence on performance of the user of the long-term evolution system.

Description

The mapping method of channel measurement pilot frequency and Physical Resource Block
Technical field
The present invention relates to radio communication, particularly relate to a kind of senior Long Term Evolution (Long-TermEvolution advance, referred to as LTE-A) mapping method of channel measurement pilot frequency (referred to as CSI-RS) and Physical Resource Block (Resource Block, referred to as RB) in system.
Background technology
Two kinds of pilot tone: CSI-RS and the demodulation pilot frequency (referred to as DMRS) of LTE-A has been defined in 3GPP LTE56 meeting, wherein clear and definite CSI-RS is cell-specific (cell-specific), every root antenna port all sends, and distributes more sparse relative to demodulation pilot frequency on running time-frequency resource.
But how CSI-RS is specifically mapped on physical resource in the not clear and definite lte-a system of prior art.
Summary of the invention
The technical problem to be solved in the present invention overcomes the problems referred to above exactly, the mapping method of a kind of channel measurement pilot frequency and Physical Resource Block is proposed, can overhead be saved, and little to the performance impact of Long Term Evolution (Long-TermEvolution, referred to as LTE) system user.
In order to solve the problems of the technologies described above, the invention provides the mapping method of a kind of channel measurement pilot frequency and Physical Resource Block, be applied in advanced long-term evolution system, comprising:
Base station arranges one or more antenna port and adopts the public guide frequency specified in long evolving system as channel measurement pilot frequency, and the channel measurement pilot frequency arranging other antenna port avoids the public guide frequency of described long evolving system and the mapping position of descending special pilot frequency.
Further, above-mentioned mapping method also can have following characteristics:
When base station arrange 1 or 2 antenna port adopt the public guide frequency that specifies in long evolving system as channel measurement pilot frequency time, the channel measurement pilot frequency that base station arranges other antenna port is distributed on the 6th or 9 or 11 or 14 OFDM symbols of Physical Resource Block;
When base station arrange 4 antenna ports adopt the public guide frequency that specifies in long evolving systems as channel measurement pilot frequency time, the channel measurement pilot frequency that base station arranges other antenna port is distributed on the 6th or 11 or 14 OFDM symbols of Physical Resource Block.
Further, above-mentioned mapping method also can have following characteristics:
The frequency domain original position of channel measurement pilot frequency in described Physical Resource Block on OFDM symbol of other antenna port described is i-th subcarrier, i=0,1,2 or 3.
Further, above-mentioned mapping method also can have following characteristics:
In other antenna port described, between the channel measurement pilot frequency of same antenna port, every other sub-carrier number is approximate number or the multiple of 12.
Further, above-mentioned mapping method also can have following characteristics:
In other antenna port described, between the channel measurement pilot frequency of same antenna port, every other sub-carrier number is 6,12 or 24.
Further, above-mentioned mapping method also can have following characteristics:
In other antenna port described, the channel measurement pilot frequency of an antenna port is positioned at an OFDM symbol in described Physical Resource Block, or is positioned at multiple OFDM symbol.
Further, above-mentioned mapping method also can have following characteristics:
For the subframe that each channel measurement pilot frequency configuration sends, channel measurement pilot frequency is mapped on Physical Resource Block by base station in the manner described above, is sent by described antenna port.
Further, above-mentioned mapping method also can have following characteristics:
Described base station evenly sends described channel measurement pilot frequency according to the fixing cycle.
Further, above-mentioned mapping method also can have following characteristics:
Base station arranges antenna port 0 ~ 3 and adopts the public guide frequency specified in long evolving system as channel measurement pilot frequency, and the channel measurement pilot frequency of other antenna ports maps in such a way;
The channel measurement pilot frequency of antenna port 4 is mapped on the subcarrier 0 of the 6th OFDM symbol of each Physical Resource Block, and on the subcarrier 6 of the 14th OFDM symbol; The channel measurement pilot frequency of antenna port 5 is mapped on the subcarrier 3 of each Physical Resource Block the 6th OFDM symbol, and on the subcarrier 9 of the 14th OFDM symbol; The channel measurement pilot frequency of antenna port 6 is mapped on the subcarrier 6 of the 6th OFDM symbol of each Physical Resource Block, and on the subcarrier 0 of the 14th OFDM symbol; The channel measurement pilot frequency of antenna port 7 is mapped on the subcarrier 9 of the 6th OFDM symbol of each Physical Resource Block, and on the subcarrier 3 of the 14th OFDM symbol.
Further, above-mentioned mapping method also can have following characteristics:
Base station arranges antenna port 0 ~ 3 and adopts the public guide frequency specified in long evolving system as channel measurement pilot frequency, and the channel measurement pilot frequency of other antenna ports maps in such a way:
The channel measurement pilot frequency of antenna port 4 is mapped on the subcarrier 0 of the 14th OFDM symbol of each Physical Resource Block; The channel measurement pilot frequency of antenna port 5 is mapped on the subcarrier 3 of each Physical Resource Block the 14th OFDM symbol; The channel measurement pilot frequency of antenna port 6 is mapped on the subcarrier 6 of the 14th OFDM symbol of each Physical Resource Block; The channel measurement pilot frequency of antenna port 7 is mapped on the subcarrier 9 of the 14th OFDM symbol of each Physical Resource Block.
Further, above-mentioned mapping method also can have following characteristics:
Described base station arranges antenna port 0 ~ 3 and adopts the public guide frequency specified in long evolving system as channel measurement pilot frequency, and the channel measurement pilot frequency of other antenna ports maps in such a way:
On the subcarrier 0 that the channel measurement pilot frequency of antenna port 4 is mapped to the 14th OFDM symbol of each Physical Resource Block and subcarrier 6; The channel measurement pilot frequency of antenna port 5 is mapped on the subcarrier 1 and 7 of each Physical Resource Block the 14th OFDM symbol; On the subcarrier 3 that the channel measurement pilot frequency of antenna port 6 is mapped to the 14th OFDM symbol of each Physical Resource Block and subcarrier 9; On the subcarrier 4 that the channel measurement pilot frequency of antenna port 7 is mapped to the 14th OFDM symbol of each Physical Resource Block and subcarrier 10.
Beneficial effect of the present invention is as follows:
1. base station is using all or part of public guide frequency as part CSI-RS, then not be used in public guide frequency transmitting antenna port transmitting channel measurement pilot frequency again, thus greatly save pilot-frequency expense;
2., because undefined CSI-RS, LTE user can not identify the CSI-RS that Physical Resource Block sends in LTE physical layer standard, LTE user will using the symbol of CSI-RS as mistake in the data received; In the present invention, newly-increased CSI-RS distributes very sparse on each RB, very little to the original performance degradation of LTE;
3. the subcarrier number that the CSI-RS of newly-increased each antenna port is separated by is approximate number or the multiple of subcarrier number 12 on each RB, is convenient to CSI-RS uniform on full bandwidth;
4. the CSI-RS of newly-increased antenna port can send by each antenna port uniform intervals, is conducive to reducing the degradation to LTE system;
5. can obtain the channel quality indication (CQI) information on full bandwidth;
6. do not destroy original public guide frequency pattern, less to systematic influence.
Accompanying drawing explanation
Fig. 1 is public guide frequency and the descending special pilot frequency pattern of normal cyclic prefix frame structure.
Fig. 2 is the CSI-RS of embodiment one and the mapping pattern of Physical Resource Block;
Fig. 3 is the CSI-RS of embodiment two and the mapping pattern of Physical Resource Block;
Fig. 4 is the CSI-RS of embodiment three and the mapping pattern of Physical Resource Block;
Fig. 5 is the CSI-RS of embodiment four and the mapping pattern of Physical Resource Block;
Fig. 6 is the CSI-RS of embodiment five and the mapping pattern of Physical Resource Block;
Fig. 7 is the CSI-RS of embodiment six and the mapping pattern of Physical Resource Block;
Fig. 8 is the CSI-RS of embodiment seven and the mapping pattern of Physical Resource Block;
Fig. 9 (A) ~ (B) CSI-RS for embodiment eight and the mapping pattern of Physical Resource Block.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in detail.
In LTE and lte-a system, when physical resource is configured to, the structure of two dimension frequently.Specify in the physical layer standard of LTE, the time domain of a Physical Resource Block (being called for short RB) of normal circulation frame structure comprises 14 OFDMs (Orthogonal Frequency Division Multiplexing, referred to as OFDM) symbol, frequency domain comprises 12 subcarriers.RB is the base unit of physical source distributing in ofdm system, as shown in Figure 1.
Because LTE system supports at most 4 antennas, so the public guide frequency of antenna port 0,1,2,3 has defined its pilot tone pattern in LTE system, as shown in Figure 1.The present invention based on this, when public guide frequency being used for channel quality indication calculation CSI-RS and Physical Resource Block mapping in.
In the present invention, based on public guide frequency, because the most multipotency of lte-a system supports 8 antennas, then base station arranges wherein one or more (preferably 4,2 or 1) antenna ports and adopts the public guide frequency specified in former LTE system as CSI-RS, and the CSI-RS arranging other antenna port avoids the public guide frequency of former LTE system and the mapping position of descending special pilot frequency:
When base station arrange 4 antenna ports adopt the public guide frequency that specifies in former LTE system as CSI-RS time, the CSI-RS that base station arranges other antenna port is distributed in the 6th or 11 or 14 OFDM symbol of RB;
When base station arrange 2 antenna ports adopt the public guide frequency that specifies in former LTE system as CSI-RS time, the CSI-RS that base station arranges other antenna port is distributed in the 6th or 9 or 11 or 14 OFDM symbol of RB;
When base station arrange 1 antenna port adopt the public guide frequency that specifies in former LTE system as CSI-RS time, the CSI-RS that base station arranges other antenna port is distributed in the 6th or 9 or 11 or 14 OFDM symbol of RB.
Preferably, the frequency domain original position of CSI-RS in described RB in OFDM symbol of other antenna port described is i-th subcarrier, i=0,1,2,3.
In other antenna port described, between the CSI-RS of same antenna port, every other sub-carrier number is approximate number or the multiple of 12,6 or 12 or 24 subcarriers of being preferably separated by.
In other antenna port described, the CSI-RS of an antenna port can be positioned at an OFDM symbol in described RB, also can be positioned at multiple OFDM symbol;
For the subframe that each CSI-RS configuration sends, CSI-RS is mapped on Physical Resource Block by base station in a manner described, is sent by described antenna port;
The subframe that described CSI-RS configuration sends refers to: the subframe of carrying CSI-RS.
Base station can send CSI-RS continuously by above-mentioned mapping mode, also evenly can send CSI-RS at each antenna port according to the fixing cycle.
It is 5ms that the CSI-RS of high level (referring to the layer of more than the MAC layer) allocating cell of such as base station sends the cycle, and so every 5ms CSI-RS sends once according to above mapping mode, and four subframes at interval do not send CSI-RS.In the subframe that CSI-RS configuration sends, CSI-RS is mapped on Physical Resource Block by base station in a manner described, is sent by described antenna port.The time interval (namely sending the cycle) that CSI-RS sends by the LTE-A number of users of high level according to this community and the VELOCITY DISTRIBUTION of user, can be configured each community.
Embodiment one
As shown in Figure 2, base station arranges antenna port 0 ~ 3 and adopts the public guide frequency specified in LTE as CSI-RS, and the CSI-RS of other antenna ports maps in such a way:
1. the CSI-RS of antenna port 4 is mapped on the subcarrier 3 of the 6th OFDM symbol of each RB;
2. the CSI-RS of antenna port 5 is mapped on the subcarrier 9 of each RB the 6th OFDM symbol;
3. the CSI-RS of antenna port 6 is mapped on the subcarrier 3 of each RB the 14th OFDM symbol;
4. the CSI-RS of antenna port 7 is mapped on the subcarrier 9 of each RB the 14th OFDM symbol;
For the subframe that each CSI-RS configuration sends, CSI-RS is mapped on Physical Resource Block by base station in a manner described, is sent by described antenna port.
On full bandwidth, in antenna port 4 ~ 7, the CSI-RS of each antenna port is separated by 12 subcarriers.
Embodiment two
As shown in Figure 3, base station arranges antenna port 0 ~ 3 and adopts the public guide frequency specified in LTE as CSI-RS, and the CSI-RS of other antenna ports maps in such a way:
1. the CSI-RS of antenna port 4 is mapped on the subcarrier 3 of the 6th OFDM symbol of each RB;
2. the CSI-RS of antenna port 5 is mapped on the subcarrier 9 of each RB the 6th OFDM symbol;
3. the CSI-RS of antenna port 6 is mapped on the subcarrier 0 of each RB the 11st OFDM symbol;
4. the CSI-RS of antenna port 7 is mapped on the subcarrier 6 of each RB (Physical Resource Block) the 11st OFDM symbol;
For the subframe that each CSI-RS configuration sends, CSI-RS is mapped on Physical Resource Block by base station in a manner described, is sent by described antenna port.
On full bandwidth, in antenna port 4 ~ 7, the CSI-RS of each antenna port is separated by 12 subcarriers.
Embodiment three
As shown in Figure 4, base station arranges antenna port 0 ~ 3 and adopts the public guide frequency specified in LTE as CSI-RS, and the CSI-RS of other antenna ports maps in such a way:
1. the CSI-RS of antenna port 4 is mapped on the subcarrier 0 of the 6th OFDM symbol of each RB, and on the subcarrier 6 of the 14th OFDM symbol;
2. the CSI-RS of antenna port 5 is mapped on the subcarrier 3 of each RB the 6th OFDM symbol, and on the subcarrier 9 of the 14th OFDM symbol;
3. the CSI-RS of antenna port 6 is mapped on the subcarrier 6 of the 6th OFDM symbol of each RB, and on the subcarrier 0 of the 14th OFDM symbol;
4. the CSI-RS of antenna port 7 is mapped on the subcarrier 9 of the 6th OFDM symbol of each RB, and on the subcarrier 3 of the 14th OFDM symbol;
For the subframe that each CSI-RS configuration sends, CSI-RS is mapped on Physical Resource Block by base station in a manner described, is sent by described antenna port.
On full bandwidth, in antenna port 4 ~ 7, the CSI-RS of each antenna port is separated by 6 subcarriers.
Embodiment four
As shown in Figure 5, base station arranges antenna port 0 ~ 3 and adopts the public guide frequency specified in LTE as CSI-RS, and the CSI-RS of other antenna ports maps in such a way:
1. on the CSI-RS of antenna port 4 subcarrier 2 that is mapped to the 6th OFDM symbol of each RB and subcarrier 8;
2. on the CSI-RS of antenna port 5 subcarrier 5 that is mapped to each RB the 6th OFDM symbol and subcarrier 11;
3. on the CSI-RS of antenna port 6 subcarrier 2 that is mapped to the 14th OFDM symbol of each RB and subcarrier 8;
4. on the CSI-RS of antenna port 7 subcarrier 5 that is mapped to the 14th OFDM symbol of each RB and subcarrier 11;
For the subframe that each CSI-RS configuration sends, CSI-RS is mapped on Physical Resource Block by base station in a manner described, is sent by described antenna port.
On full bandwidth, in antenna port 4 ~ 7, the CSI-RS of each antenna port is separated by 6 subcarriers.
Embodiment five
As shown in Figure 6, base station arranges antenna port 0 ~ 3 and adopts the public guide frequency specified in LTE as CSI-RS, and the CSI-RS of other antenna ports maps in such a way:
1. the CSI-RS of antenna port 4 is mapped on the subcarrier 0 of the 14th OFDM symbol of each RB;
2. the CSI-RS of antenna port 5 is mapped on the subcarrier 3 of each RB the 14th OFDM symbol;
3. the CSI-RS of antenna port 6 is mapped on the subcarrier 6 of the 14th OFDM symbol of each RB;
4. the CSI-RS of antenna port 7 is mapped on the subcarrier 9 of the 14th OFDM symbol of each RB;
For the subframe that each CSI-RS configuration sends, CSI-RS is mapped on Physical Resource Block by base station in a manner described, is sent by described antenna port.
On full bandwidth, in antenna port 4 ~ 7, the CSI-RS of each antenna port is separated by 12 subcarriers.
Embodiment six
As shown in Figure 7, base station arranges antenna port 0 ~ 3 and adopts the public guide frequency specified in LTE as CSI-RS, and the CSI-RS of other antenna ports maps in such a way:
1. on the CSI-RS of antenna port 4 subcarrier 0 that is mapped to the 14th OFDM symbol of each RB and subcarrier 6;
2. the CSI-RS of antenna port 5 is mapped on the subcarrier 1 and 7 of each RB the 14th OFDM symbol;
3. on the CSI-RS of antenna port 6 subcarrier 3 that is mapped to the 14th OFDM symbol of each RB and subcarrier 9;
4. on the CSI-RS of antenna port 7 subcarrier 4 that is mapped to the 14th OFDM symbol of each RB and subcarrier 10;
For the subframe that each CSI-RS configuration sends, CSI-RS is mapped on Physical Resource Block by base station in a manner described, is sent by described antenna port.
On full bandwidth, in antenna port 4 ~ 7, the CSI-RS of each antenna port is separated by 6 subcarriers.
Embodiment seven
As shown in Figure 8, base station arranges antenna port 0 ~ 1 and adopts in LTE the public guide frequency specified as CSI-RS, the public guide frequency of not transmitting antenna port 2 ~ 3 in full bandwidth resource.The CSI-RS of other antenna ports maps in such a way:
1. the CSI-RS of antenna port 2 is mapped on the subcarrier 0 of the 6th OFDM symbol of each RB;
2. the CSI-RS of antenna port 3 is mapped on the subcarrier 6 of each RB the 6th OFDM symbol;
3. the CSI-RS of antenna port 4 is mapped on the subcarrier 3 of each RB the 11st OFDM symbol;
4. the CSI-RS of antenna port 5 is mapped on the subcarrier 9 of each RB the 11st OFDM symbol;
5. the CSI-RS of antenna port 6 is mapped on the subcarrier 0 of each RB the 14th OFDM symbol;
6. the CSI-RS of antenna port 7 is mapped on the subcarrier 6 of each RB the 14th OFDM symbol;
For the subframe that each CSI-RS configuration sends, CSI-RS is mapped on Physical Resource Block by base station in a manner described, is sent by described antenna port.
On full bandwidth, in antenna port 2 ~ 7, the CSI-RS of each antenna port is separated by 12 subcarriers.
Embodiment eight
As shown in Figure 9, base station arranges antenna port 0 and adopts the public guide frequency specified in LTE as CSI-RS, and the CSI-RS of other antenna ports maps in such a way:
1. the CSI-RS of antenna port 1, i.e. R1, every 2 RB send once, are mapped on the subcarrier 1 of the 9th OFDM symbol of first RB;
2. the CSI-RS of antenna port 2, i.e. R2, every 2 RB send once, are mapped on the subcarrier 4 of the 9th OFDM symbol of first RB;
3. the CSI-RS of antenna port 3, i.e. R3, every 2 RB send once, are mapped on the subcarrier 7 of the 9th OFDM symbol of first RB;
4. the CSI-RS of antenna port 4, i.e. R4, every 2 RB send once, are mapped on the subcarrier 10 of the 9th OFDM symbol of first RB;
5. the CSI-RS of antenna port 5, i.e. R5, every 2 RB send once, are mapped on the subcarrier 2 of the 11st OFDM symbol of second RB;
6. the CSI-RS of antenna port 6, i.e. R6, every 2 RB send once, are mapped on the subcarrier 6 of the 11st OFDM symbol of second RB;
7. the CSI-RS of antenna port 7, i.e. R7, every 2 RB send once, are mapped on the subcarrier 10 of the 11st OFDM symbol of second RB;
For the subframe that each CSI-RS configuration sends, CSI-RS is mapped on Physical Resource Block by base station in a manner described, is sent by described antenna port.
On full bandwidth, in antenna port 1 ~ 7, the CSI-RS of each antenna port is separated by 24 subcarriers.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.

Claims (7)

1. a mapping method for channel measurement pilot frequency and Physical Resource Block, is applied in advanced long-term evolution system, comprises:
Base station arranges one or more antenna port and adopts the public guide frequency specified in long evolving system as channel measurement pilot frequency, and the channel measurement pilot frequency arranging other antenna port avoids the public guide frequency of described long evolving system and the mapping position of descending special pilot frequency;
Wherein, when base station arrange 1 or 2 antenna port adopt the public guide frequency that specifies in long evolving system as channel measurement pilot frequency time, the channel measurement pilot frequency that base station arranges other antenna port is distributed on the 6th or 9 or 11 or 14 OFDM symbols of Physical Resource Block;
When base station arrange 4 antenna ports adopt the public guide frequency that specifies in long evolving systems as channel measurement pilot frequency time, the channel measurement pilot frequency that base station arranges other antenna port is distributed on the 6th or 11 or 14 OFDM symbols of Physical Resource Block, wherein:
Base station arranges antenna port 0 ~ 3 and adopts the public guide frequency specified in long evolving system as channel measurement pilot frequency, and the channel measurement pilot frequency of other antenna ports maps in such a way:
The channel measurement pilot frequency of antenna port 4 is mapped on the subcarrier 0 of the 6th OFDM symbol of each Physical Resource Block, and on the subcarrier 6 of the 14th OFDM symbol; The channel measurement pilot frequency of antenna port 5 is mapped on the subcarrier 3 of each Physical Resource Block the 6th OFDM symbol, and on the subcarrier 9 of the 14th OFDM symbol; The channel measurement pilot frequency of antenna port 6 is mapped on the subcarrier 6 of the 6th OFDM symbol of each Physical Resource Block, and on the subcarrier 0 of the 14th OFDM symbol; The channel measurement pilot frequency of antenna port 7 is mapped on the subcarrier 9 of the 6th OFDM symbol of each Physical Resource Block, and on the subcarrier 3 of the 14th OFDM symbol; Or,
Base station arranges antenna port 0 ~ 3 and adopts the public guide frequency specified in long evolving system as channel measurement pilot frequency, and the channel measurement pilot frequency of other antenna ports maps in such a way:
The channel measurement pilot frequency of antenna port 4 is mapped on the subcarrier 0 of the 14th OFDM symbol of each Physical Resource Block; The channel measurement pilot frequency of antenna port 5 is mapped on the subcarrier 3 of each Physical Resource Block the 14th OFDM symbol; The channel measurement pilot frequency of antenna port 6 is mapped on the subcarrier 6 of the 14th OFDM symbol of each Physical Resource Block; The channel measurement pilot frequency of antenna port 7 is mapped on the subcarrier 9 of the 14th OFDM symbol of each Physical Resource Block; Or,
Base station arranges antenna port 0 ~ 3 and adopts the public guide frequency specified in long evolving system as channel measurement pilot frequency, and the channel measurement pilot frequency of other antenna ports maps in such a way:
On the subcarrier 0 that the channel measurement pilot frequency of antenna port 4 is mapped to the 14th OFDM symbol of each Physical Resource Block and subcarrier 6; The channel measurement pilot frequency of antenna port 5 is mapped on the subcarrier 1 and 7 of each Physical Resource Block the 14th OFDM symbol; On the subcarrier 3 that the channel measurement pilot frequency of antenna port 6 is mapped to the 14th OFDM symbol of each Physical Resource Block and subcarrier 9; On the subcarrier 4 that the channel measurement pilot frequency of antenna port 7 is mapped to the 14th OFDM symbol of each Physical Resource Block and subcarrier 10.
2. mapping method as claimed in claim 1, it is characterized in that, the frequency domain original position of channel measurement pilot frequency in described Physical Resource Block on OFDM symbol of other antenna port described is i-th subcarrier, i=0,1,2 or 3.
3. mapping method as claimed in claim 1, it is characterized in that, in other antenna port described, between the channel measurement pilot frequency of same antenna port, every other sub-carrier number is approximate number or the multiple of 12.
4. mapping method as claimed in claim 1, it is characterized in that, in other antenna port described, between the channel measurement pilot frequency of same antenna port, every other sub-carrier number is 6,12 or 24.
5. mapping method as claimed in claim 1, it is characterized in that, in other antenna port described, the channel measurement pilot frequency of an antenna port is positioned at an OFDM symbol in described Physical Resource Block, or is positioned at multiple OFDM symbol.
6. mapping method as claimed in claim 1, is characterized in that, for the subframe that each channel measurement pilot frequency configuration sends, channel measurement pilot frequency is mapped on Physical Resource Block by base station in the manner described above, is sent by described antenna port.
7. mapping method as claimed in claim 6, is characterized in that,
Described base station evenly sends described channel measurement pilot frequency according to the fixing cycle.
CN200910134981.8A 2009-04-20 2009-04-20 Mapping method of channel measurement pilot frequency and physical resource block Expired - Fee Related CN101867949B (en)

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