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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: 2010-10-13
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • 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

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Embodiment 1

[0146] When two codeword streams are sent on a certain component carrier in the uplink of the UE, downlink transmission needs to allocate two PHICHs for the two codeword streams of the component carrier of the UE. Assume that the PHICH resource corresponding to the kth stream is In terms of specific distribution methods, the following relationship is 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 position of the second codeword stream is indirectly indicated by the PHICH resource position of the first codeword stream.

[0149] The formula is as follows:

[0150] n PHICH group [ 1 ] = I PHICH × N PHICH group × 2 + N ...

Embodiment 2

[0168] When two codeword streams are sent on a certain component carrier in the uplink of the UE, downlink transmission needs to allocate two PHICHs for the two codeword streams of the component carrier of the UE. Assume that the PHICH resource corresponding to the kth stream is In terms of specific distribution methods, the following relationship is 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 position of the second codeword stream is indirectly indicated by the PHICH resource position of the first codeword stream.

[0171] The formula is as follows:

[0172] n PHICH group [ 1 ] = Mod ( n PHICH group [ ...

Embodiment 3

[0178] When two codeword streams are sent on a certain component carrier in the uplink of the UE, downlink transmission needs to allocate two PHICHs for the two codeword streams of the component carrier of the UE. Assume that the PHICH resource corresponding to the kth stream is In terms of specific distribution methods, the following relationship is 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 ...

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Abstract

The invention discloses a method and a device for mapping resources of a physical hybrid retransmission indicator channel. The method comprises the following steps: determining the position of PHICH resources of a first code stream based on a dynamic cyclic shift parameter of a DMRS in a PHICH resource mapping formula corresponding to the first code stream, wherein the dynamic cyclic shift parameter is the signaling value of the de-modulation reference signal (DMRS) in uplink scheduling / downlink control information (DCI); indirectly indicating the position of PHICH resources of a second code stream by using the position of PHICH resources of the first code stream; and carrying out resource mapping on the position of PHICH resources of the first code stream and the position of PHICH resources of the second code stream. The invention effectively realizes the mapping of PHICH resources under UL MIMO scenarios.

Description

technical field [0001] The present invention relates to the communication field, in particular to a physical hybrid ARQ indicator channel (Physical hybrid ARQ indicator channel, PHICH for short) resource mapping method and device. Background technique [0002] The Long Term Evolution (LTE for short) system is an important plan of the third generation partnership organization. When the LTE system adopts the normal cyclic prefix (Normal Cyclic Prefix), a time slot contains 7 lengths of uplink / downlink symbols, and when the LTE system adopts the extended cyclic prefix (Extended Cyclic Prefix), a time slot contains 6 lengths of uplink / downlink symbols . [0003] figure 1 It is a schematic diagram of a physical resource block of an LTE system with a bandwidth of 5MHz according to related technologies, such as figure 1 As shown, a resource element (Resource Element, referred to as RE) is a subcarrier in an OFDM symbol, and a downlink resource block (Resource Block, referred to ...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/06
CPCH04L1/1893
Inventor 夏树强戴博曾萍吴欣左志松
Owner ZTE CORP
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