Mapping cyclic shif to channel index used for ACK/NACK resource allocation

一种资源分配、资源的技术，应用在无线网络领域，能够解决影响UE互相关性质等问题

Active Publication Date: 2015-08-26
NOKIA NETWORKS OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CSI is used to find the appropriate PHICH, but CSI itself affects the cross-correlation properties between UE's transmissions

Method used

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  • Mapping cyclic shif to channel index used for ACK/NACK resource allocation
  • Mapping cyclic shif to channel index used for ACK/NACK resource allocation
  • Mapping cyclic shif to channel index used for ACK/NACK resource allocation

Examples

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Embodiment Construction

[0056] Embodiments of the present invention relate to a mapping that may preferably be defined in a radio specification that defines a default behavior for UE and eNodeB regarding the interpretation of the cyclic shift (given by CSI) of the DM RS such that for different configurations The optimal cyclic shift for will result in the smallest offset for the PHICH index modifier detailed in above-referenced US Patent Application Serial No. 12 / 349,683. It is the default mapping behavior as it can be dynamically modified by the eNodeB for maximum flexibility in the wireless system. It should be noted that although the exemplary embodiments are detailed with respect to an LTE environment, these teachings can be implemented in any wireless system that maps downlink channels to uplink channels and uses cyclic shifting in one of them .

[0057] As a citation prior to studying the details of various implementations, the reference to figure 1 for reference, figure 1 Simplified block d...

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Abstract

From the network perspective, an uplink resource allocation (PDCCH) is sent that grants an uplink resource to a plurality of user equipments UEs, and the allocation has an indication of a cyclic shift CS for each of the plurality of UEs. The granted uplink resource is mapped to a downlink resource (PHICH) in dependence on the indicated CS for each of the plurality of UEs. The mapping is such that for a predetermined number of UEs being allocated a same uplink resource in a single MU-MIMO uplink resource allocation grant, each pair of said predetermined number of UEs which map to an adjacent downlink resource exhibit an optimized CS relative to one another. The network sends to each of the respective plurality of UEs on the respective mapped downlink resource an indication (ACK / NACK) about data received (on a PUSCH). Apparatus, method, and computer programs for network and UE side implementations are detailed.

Description

[0001] Cross references to related patent applications [0002] Pursuant to Title 35, United States Code, Section 119(e), this patent application claims priority from United States Provisional Patent Application No. 61 / 063.620, filed February 4, 2008, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] This teaching is generally concerned with wireless networks employing ACK / NACK protocols, especially in cases where the ACK / NACK is sent on a channel that is implicitly mapped based on the occupied physical data / control resources of the data to which the ACK / NACK refers. NACK. Background technique [0004] This section is intended to provide a background or context to the invention that is recited in the claims. The description herein may include that concepts may be pursued, but not necessarily concepts that have been previously conceived or pursued. Therefore, unless otherwise indicated herein, what is described in this sec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/18H04L5/00H04W72/00
CPCH04W72/0493H04L5/0053H04L5/0044H04W28/04H04L1/1607H04L1/1854H04W72/042H04W72/00H04L5/0091H04L5/0005H04W72/0406H04W72/04H04W72/23H04W72/20H04W72/53H04L1/1812H04L5/0048H04L5/0055H04L27/2607
Inventor F.弗雷德里克森E.T.蒂罗拉
Owner NOKIA NETWORKS OY
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