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Apparatus, method and computer program memory medium providing efficient signaling of rach response

A technology of storage medium and response message, applied in wireless communication, network traffic/resource management, digital transmission system, etc., can solve the problem of not being able to optimize resources, etc.

Inactive Publication Date: 2010-06-16
NOKIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is especially true for signaling related to random access, since in this case the eNB does not have precise information about the channel state of the DL, and thus cannot optimize resources according to signal quality

Method used

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  • Apparatus, method and computer program memory medium providing efficient signaling of rach response
  • Apparatus, method and computer program memory medium providing efficient signaling of rach response
  • Apparatus, method and computer program memory medium providing efficient signaling of rach response

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Embodiment Construction

[0057] By way of introduction and as mentioned above, the resources involved in L1 / L2 control signaling can be considered as scarce resources and any opportunity that arises to reduce the number of signaling bits is significant. This is especially true for signaling related to random access, since the eNB does not have precise information about the channel state of the DL, and therefore cannot optimize resources according to the signal instructions.

[0058]The inventors have realized that normal DL signaling entities contain bits that are not necessary for dispatching RACH responses. For example, HARQ is not used for RACH response, thus, there is no need to reserve bits for HARQ. Another possibly unnecessary information field contains some number of bits for expressing precoding information. In general, precoding has limited value if the eNB needs to send RACH responses to several UEs in a TTI. Furthermore, the inventors have realized that signaling can be simplified at lea...

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Abstract

Disclosed are various exemplary embodiments of apparatus, methods and memory medium storing computer program instructions for both a base station and a user equipment. For example, an apparatus includes a radio frequency transmitter and a controller configured to derive a resource assignment for a random access channel response for at least one user equipment. At least part of the resource assignment is specified explicitly and at least part of the resource assignment is specified implicitly. The controller is further configured to transmit a message that includes the derived resource assignment for the random access channel response to at least one user equipment.

Description

technical field [0001] The exemplary and non-limiting embodiments of the present invention relate generally to wireless communication systems, methods, devices and computer program products, and more particularly to the use of random access channels between user equipment and wireless network access nodes . Background technique [0002] Various abbreviations appearing in this specification and / or in the drawings are defined as follows: [0003] 3GPP Third Generation Partnership Project [0004] UTRAN Universal Terrestrial Radio Access Network [0005] Node B Node B [0006] UE User Equipment [0007] HO switching [0008] EUTRAN Evolved UTRAN [0009] aGW access gateway [0010] eNB EUTRAN Node B (Evolved Node B) [0011] PDCCH Physical Downlink Control Channel [0012] PDSCH physical downlink shared channel [0013] RACH random access channel [0014] LTE Long Term Evolution [0015] CDM code division multiplexing [0016] FDD frequency division multiplexing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56
CPCH04W74/0833H04W28/06H04W72/1289H04W74/006H04W72/23
Inventor J·K·奥亚拉J·S·科尔霍宁
Owner NOKIA CORP