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Enhanced pilot transmission method and system under mbms service non-dedicated carrier

A dedicated carrier and service technology, applied in the direction of multi-frequency code system, etc., can solve the problem that the pilot frequency cannot meet the requirements of high data rate, etc., and achieve the effect of increasing the number of layers and increasing the data transmission rate

Inactive Publication Date: 2017-03-22
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide an enhanced pilot transmission method and system under non-dedicated carriers for MBMS services, so as to at least solve the problem that the pilots in the prior art cannot meet the high data rate requirements

Method used

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  • Enhanced pilot transmission method and system under mbms service non-dedicated carrier
  • Enhanced pilot transmission method and system under mbms service non-dedicated carrier
  • Enhanced pilot transmission method and system under mbms service non-dedicated carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] figure 2 The pattern of a group of MBMS pilots in a subframe is given. The total overhead is 36REs / RB. Different pilot ports in the same pilot group can be distinguished by time division or code division.

[0057] When a pilot group contains two pilot ports, the specific mapping method is: the first 1 to 2 OFDM symbols can be used for downlink control channel transmission, and the MBMS pilot can be mapped to the {2, 3} and { 6, 7, 10, 11} OFDM symbols. Suppose the RE positions occupied by pilot port 0 are respectively (x0, y0), and the RE positions occupied by pilot port 1 are (x1, y1), where x represents the index of the relative subcarrier sequence number OFDM symbol in an RB, y represents the index of the OFDM symbol. When using time division multiplexing to map the pilot ports, (x0, y0) = {(2m, 2), (2m+1, 6), (2m, 10)}, (x1, y1) = {(2m, 3), (2m+1, 7), (2m, 11)} or (x1, y1) = {(2m, 2), (2m+1, 6), (2m, 10)}, (x0, y0 )={(2m,3),(2m+1,7),(2m,11)}, where m={0,1,...,5}. ...

Embodiment 2

[0060] image 3 The pattern of a group of MBMS pilots in a subframe is given. The total overhead is 24REs / RB. Different pilot ports in the same pilot group can be distinguished by time division or code division.

[0061] When a pilot group contains two pilot ports, the specific mapping method is: the first 1 to 2 OFDM symbols are used for downlink control channel transmission, and MBMS pilots can be mapped to the {4, 5, 10, 11} OFDM symbol. Suppose the RE positions occupied by pilot port 0 are respectively (x0, y0), and the RE positions occupied by pilot port 1 are (x1, y1), where x represents the index of the relative subcarrier sequence number OFDM symbol in an RB, y represents the index of the OFDM symbol. When using time division multiplexing to map the pilot ports, (x0, y0) = {(2m, 4), (2m+1, 10)}, (x1, y1) = {(2m, 5), (2m+ 1,11)} or (x1, y1)={(2m,4), (2m+1,10)}, (x0,y0)={(2m,5), (2m+1,11)}, Where m={0,1,...,5}. When using code division multiplexing to map the pilot port...

Embodiment 3

[0064] Figure 4 The pattern of a group of MBMS pilots in a subframe is given. The total overhead is 24REs / RB. Different pilot ports in the same pilot group can be distinguished by time division or code division.

[0065] When a pilot group contains two pilot ports, the specific mapping method is: the first 1 to 2 OFDM symbols are used for downlink control channel transmission, and MBMS pilots can be mapped to the {4, 5, 10, 11} OFDM symbol. Suppose the RE positions occupied by pilot port 0 are respectively (x0, y0), and the RE positions occupied by pilot port 1 are (x1, y1), where x represents the index of the relative subcarrier sequence number OFDM symbol in an RB, y represents the index of the OFDM symbol. When using time division multiplexing to map the pilot ports, (x0, y0) = {(2m, 4), (2m, 10)}, (x1, y1) = {(2m, 5), (2m, 11) } Or (x1, y1) = {(2m, 4), (2m, 10)}, (x0, y0) = {(2m, 5), (2m, 11)}, where m = {0, 1, …,5}. When using code division multiplexing to map the pilot...

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Abstract

The invention discloses a method and system for transmitting an enhanced pilot frequency under a non-dedicated carrier wave of an MBMS (model base management system) business. The method comprises the following steps: multiplexing one antenna port or more antenna ports of the MBMS business on one or more OFDM (orthogonal frequency division multiplexing) symbols in a second OFDM symbol of an even-numbered timeslot, a third OFDM symbol of the even-numbered timeslot, a fourth OFDM symbol of the even-numbered timeslot, a fifth OFDM symbol of the even-number timeslot, a 0th OFDM symbol of an odd number timeslot, a first OFDM symbol of the odd number timeslot, a fourth OFDM symbol of the odd number timeslot and a fifth OFDM symbol of the odd number timeslot in a time division, frequency division or code division mode, and transmitting the pilot frequency under the non-dedicated carrier wave of the MBMS business on a multiplexed antenna port. According to the transmitting the enhanced pilot frequency under the non-dedicated carrier wave of the MBMS business, the problem that the method for transmitting the enhanced pilot frequency under the non-dedicated carrier wave of the MBMS business in the prior art cannot meet the requirement of high data rate, so as to improve the quantity of transmission layers of the MBMS business and the data transmission rate of the MBMS business.

Description

Technical field [0001] The present invention relates to the field of wireless communication, and in particular to a method and system for designing an enhanced pilot frequency under an MBMS service non-dedicated carrier in an LTE-Advanced (Long term evolution advanced system) system. Background technique [0002] In LTE Release 8 / 9, for PTP (Point to Point) service, CRS (Common Reference Signal), UE (User Equipment, user equipment) are designed to measure the quality of the channel and demodulate the received data symbols. ) Channel measurement can be performed through CRS to determine UE cell reselection and handover to the target cell, and the channel quality measurement is performed in the UE connection state. When the interference level is high, the physical layer can pass through high-level related radio links The connection failure signaling disconnects. In LTE R10, in order to further improve the average spectrum utilization rate of the cell and the cell edge spectrum uti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 郭森宝孙云锋张峻峰
Owner ZTE CORP