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Handling uplink grant in random access response

A technology for downlink and link resources, applied in the field of formatted uplink license

Active Publication Date: 2011-07-13
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sending requests for resources consumes uplink resources and sending grants for resources consumes downlink resources

Method used

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  • Handling uplink grant in random access response
  • Handling uplink grant in random access response
  • Handling uplink grant in random access response

Examples

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Embodiment Construction

[0034] A wireless communication system provides a Random Access Channel (RACH) procedure for user equipment (UE) to request access to an uplink channel. From a physical layer perspective, an evolved base station (eNB) responds with a Random Access Response (RARP), which can detect a preamble, a fixed-length message (e.g., 21 bits, or 20 bits reserved for future extensions), and other fields such as Timing Advance and Cell Radio Network Temporary Identifier (C-RNTI) as echoes. In response to the existing need to adapt RAR to changes in uplink system bandwidth, a method of encoding a truncated resource block (RB) assignment of a RAR in such a way that a UE can interpret the RAR at any system bandwidth is provided. In this way, the need to implement RACH procedures and have channel resources can be realized.

[0035] Various aspects are now described with reference to the figures. In the following description, for purposes of explanation, numerous specific details are set forth...

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Abstract

A wireless communication system provides for a random access channel (RACH) procedure for user equipment (UE) to request access to an uplink channel. From a physical layer perspective, an evolved Base Station (eNB) responds with a random access preamble and a random access response (RAR) of a fixed length message, such as 21 bits or 20 bits with a reserved bit for future extensions. In answer to a need that exists for an RAR to accommodate variations in system bandwidth, an approach to encoding a truncated resource block (RB) assignment of the RAR in manner in which the UE can interpret the RAR without loss of information. Thereby, needs for achieving RACH procedures and existing channel resources can be realized.

Description

[0001] Claim of priority under 35 U.S.C. §119 [0002] This patent application claims No. 61 of the titled "A Method and Apparatus for Handling Uplink Grant in Wireless Communication System (A Method and Apparatus for Handling Uplink Grant in Wireless Communication System)" filed on August 12, 2008. / 088,308 provisional application and the application titled "Method and Apparatus for Handling Uplink Grant in Wireless Communication System (AMethod and Apparatus for Handling Uplink Grant in Wireless Communication System)" filed on August 12, 2008 Priority to Provisional Application No. 61 / 088,327, both assigned to the present assignee and expressly incorporated herein by reference. technical field [0003] The exemplary and non-limiting aspects described herein relate generally to wireless communication systems, methods, computer program products, and apparatuses, and more specifically, to techniques for formatting uplink grants. Background technique [0004] Wireless commun...

Claims

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Application Information

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IPC IPC(8): H04W74/08
CPCH04W74/0833H04W74/004H04W72/042H04W28/04H04W74/006H04W74/0866H04W72/23H04W72/04
Inventor 胡安·蒙托霍阿诺德·梅朗
Owner QUALCOMM INC
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