Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and device for mapping resources of physical hybrid retransmission indicator channel

A technology of retransmission indication and physical mixing, which is applied in the field of resource mapping of physical mixing retransmission indication channels, and can solve the problems of complex indirect mapping of the second codeword stream and poor performance against channel fading

Inactive Publication Date: 2015-04-01
ZTE CORP
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0047] For method one, because the DMRS signaling in the uplink scheduling DCI is 3 bits, if the PHICH mapping of the first codeword stream follows the R8 method, the indirect mapping method of the second codeword stream may be more complicated; for method two, in general , it can only ensure that the PHICHs of the two CWs are in different groups, the sequence index is the same, and the anti-channel fading performance is relatively poor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for mapping resources of physical hybrid retransmission indicator channel
  • Method and device for mapping resources of physical hybrid retransmission indicator channel
  • Method and device for mapping resources of physical hybrid retransmission indicator channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0146] When the UE has two codeword streams to transmit on a component carrier in the uplink, the downlink transmission needs to allocate two PHICHs for the two codeword streams of the component carrier of the UE. Suppose the PHICH resource corresponding to the kth stream is In terms of specific distribution methods, the following relationships are satisfied:

[0147] The DMRS parameter in the PHICH resource mapping formula of the first codeword stream is the DMRS signaling value in the uplink scheduling DCI.

[0148] The PHICH resource location of the second codeword stream is indirectly indicated by the PHICH resource location of the first codeword stream.

[0149] The formula is as follows:

[0150] n PHICH group [ 1 ] = I PHICH × N PHICH group × 2 + N PHICH group - n PHICH group [ 0 ] - 1 - - - ( 2 )

[0151] n PHICH seq [ 1 ] = 2 N SF PHICH - n PHICH seq ...

Embodiment 2

[0168] When the UE has two codeword streams to transmit on a component carrier in the uplink, the downlink transmission needs to allocate two PHICHs for the two codeword streams of the component carrier of the UE. Suppose the PHICH resource corresponding to the kth stream is In terms of specific distribution methods, the following relationships are satisfied:

[0169] The DMRS parameter in the PHICH resource mapping formula of the first codeword stream is the DMRS signaling value in the uplink scheduling DCI.

[0170] The PHICH resource location of the second codeword stream is indirectly indicated by the PHICH resource location of the first codeword stream.

[0171] The formula is as follows:

[0172] n PHICH group [ 1 ] = Mod ( n PHICH group [ 0 ] + C , N PHICH group ) - - - ( 10 )

[0173] n PHICH seq [ 1 ] = Mod ( n PHICH seq [ 0 ] + D , 2 N SF PHI...

Embodiment 3

[0178] When the UE has two codeword streams to transmit on a component carrier in the uplink, the downlink transmission needs to allocate two PHICHs for the two codeword streams of the component carrier of the UE. Suppose the PHICH resource corresponding to the kth stream is In terms of specific distribution methods, the following relationships are satisfied:

[0179] The DMRS parameter in the PHICH resource mapping formula of the first codeword stream is the DMRS signaling value in the uplink scheduling DCI.

[0180] n PHICH group = ( I PRB _ RA lowest _ index + n DMRS ) mod N PHICH group + I PHICH N PHICH group - - - ( 12 )

[0181]

[0182] Among them, C[0]=0, D[0]=0;

[0183] The PHICH resource location of the second codeword stream is indirectly indicated by the PHICH resource location of the first codeword stream.

[0184] The formula is as follows:

[0185] n PHICH group [ 1 ]...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses a resource mapping method and an apparatus for Physical Hybrid Automatic Repeat Request (ARQ) Indicator Channel (PHICH). The method includes: according to the dynamic cyclic shift parameter of a Demodulation Reference Signal (DMRS) in the PHICH resource mapping formula corresponding to a first code stream, determining the PHICH resource position of the first code stream, wherein the dynamic cyclic shift parameter is the DMRS signaling value in the Downlink Control Information (DCI); indicating the PHICH resource position of a second code stream indirectly by utilizing the PHICH resource position of the first code stream; implementing a resource mapping process on the PHICH resource positions of the first and the second code streams. The present invention effectively realizes the PHICH resource mapping in an Uplink Multiple Input Multiple Output (UL MIMO) scenario.

Description

Technical field [0001] The present invention relates to the field of communications, and in particular to a resource mapping method and device for a physical hybrid ARQ indicator channel (PHICH for short). Background technique [0002] The Long Term Evolution (LTE) system is an important plan of the third-generation partner organization. When the LTE system uses the Normal Cyclic Prefix, a slot contains 7-length uplink / downlink symbols, when the LTE system uses the extended cyclic prefix (Extended Cyclic Prefix), a slot contains 6-length uplink / downlink symbols . [0003] figure 1 It is a schematic diagram of the physical resource block of the LTE system with a bandwidth of 5MHz according to the related technology, such as figure 1 As shown, a resource element (Resource Element, abbreviated as RE) is a subcarrier in an OFDM symbol, and a downlink resource block (Resource Block, abbreviated as RB) consists of 12 consecutive subcarriers and 7 consecutive (extended The cyclic prefix...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L1/06
CPCH04L1/1893
Inventor 夏树强戴博曾萍吴欣左志松
Owner ZTE CORP