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Method and device for transmitting channel measurement pilot frequency

A channel measurement pilot and control channel technology, applied in the field of wireless communication systems, to achieve the effects of reducing overhead, increasing throughput, and reducing performance degradation

Inactive Publication Date: 2011-01-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the main purpose of the present invention is to provide a method for transmitting channel measurement pilots in the LTE-A system, which is used to solve the technical problem of how to map the channel measurement pilots in the LTE-A system

Method used

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  • Method and device for transmitting channel measurement pilot frequency
  • Method and device for transmitting channel measurement pilot frequency
  • Method and device for transmitting channel measurement pilot frequency

Examples

Experimental program
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Effect test

Embodiment 1

[0068] Step E11, after calculation, the number of control symbols that all users (including LTE R8 protocol version users and LTE-A protocol version users) actually need to occupy is 2.

[0069] In step E12, the eNB configures the CFI codeword as "00000000000000000000000000000000".

[0070] Step E13, send the pilot CRS of LTE R8 protocol version users with the full bandwidth of the first two control symbols, and the CRS on these two symbols are mapped according to the definition in LTE; the transmission pattern is the same as the pattern defined by the pilot in LTE.

[0071] Step E14 , sending the CRS full bandwidth of the R8 protocol version user on other control symbols.

[0072] Step E15 , the eNB configures the period and the number N of CCEs for the channel measurement pilot CSI-RS of the redundant antenna port of LTE-A.

[0073] Step E16, allocate the CCE resources required by users of the LTE R8 protocol version to users of the LTE R8 protocol version; then other CCE r...

Embodiment 2

[0079] Step E21, assuming that the current system bandwidth is 10M, and the number of control symbols actually occupied by all users is 3.

[0080] In step E22, the eNB configures the CFI as "11011011011011011011011011011011".

[0081] Step E23 , the first two symbols send CRS with full bandwidth, and the CRS sending pattern on these symbols is the same as the pattern defined by LTE CRS.

[0082] Step E24, the pilot CRS of the users of the LTE R8 protocol version on other symbols is sent with full bandwidth, so as to facilitate the access of the users of the LTE R8 protocol version without frequency band restrictions.

[0083] Step E25, determine the channel measurement pilot transmission period and the number N of CCEs of the redundant antenna ports of the LTE-A user;

[0084] Step E26 , first allocate CCEs to the pilots of the LTE-A users, and the number of REs corresponding to the allocated CCEs is 14.3% of the number of REs corresponding to the control symbols.

[0085] ...

Embodiment 3

[0089] Step E31 , assuming that the current system bandwidth is 1.4M, and the number of control symbols actually occupied by all users is 4.

[0090] In step E32, the eNB configures the CFI as "11011011011011011011011011011011".

[0091] Step E33 , the first two symbols are full bandwidth to send the pilot of LTE R8 protocol version users, and the pilot CRS transmission pattern on these symbols is the same as the pattern defined by CRS in LTE.

[0092] Step E34 , the pilots of users of the LTE R8 protocol version on other symbols are sent with full bandwidth, which is convenient for users of the LTE R8 protocol version to access without frequency band restrictions.

[0093] Step E35, determine the channel measurement pilot transmission period of the redundant antenna port of the LTE-A user

[0094] Step E36 , first allocate CCEs to the channel measurement pilots of the LTE-A users, and the number of REs corresponding to the allocated CCEs is 1 CCE.

[0095] Step E37, the pri...

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Abstract

The invention discloses a method and a device for transmitting channel measurement pilot frequency, which are applicable to channel measurement pilot frequency in an LTE-A (Long Term Evolution-Advanced) system and are used for solving the problem on transmitting channel measurement pilot frequency in the LTE-A system. The mapping pattern of the pilot frequency of an original antenna port of an R8 protocol version system in two first symbols of each subframe is ensured to be unchanged by calculating the control symbols occupied by all users and sending the channel measurement pilot frequency on redundant control symbols, R8 users are compatible, and the influence on R8 protocol version users is small. The channel measurement pilot frequency provides pilot frequency information required by high-order MIMO (Multiple Input Multiple Output) and COMP (Coordinated Multi-Point), so that LTE-A users can improve single-link quality conveniently. The total number of the channel measurement pilot frequency is small, so that the expense of the pilot frequency is reduced. The channel measurement pilot frequency full bandwidth is sent in all redundant antenna ports, the measurement information of all bandwidth and all antenna ports of channel measurement can be ensured, and the throughput of the LET-A system is increased.

Description

technical field [0001] The present invention relates to a wireless communication system, in particular to a method and device for transmitting a channel measurement pilot suitable for an LTE-Advanced system. Background technique [0002] In order to improve the throughput of the cell and coordinate interference between cells, a new generation of wireless communication systems, such as LTE-Advance (Long-Term Evolution advance, advanced long-term evolution system), IMT-Advance (International Mobile Telecommunication advance, advanced international wireless communication System) and so on have introduced the coordinated transmission technology between network levels (Coordinate Multipoint Transmission and Reception hereinafter referred to as COMP). [0003] In the 3GPP LTE56 meeting, two kinds of pilots of LTE-Advanced (LTE-A for short): Channel State Indicator Reference Signal (CSI-RS for short) and Demodulation Reference Signal (Demodulation Reference Signal) have been define...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04W72/04
Inventor 李岩姜静王衍文刘文豪
Owner ZTE CORP
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