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Apparatus and method for transmitting and receiving enhanced RACH in a mobile communication system

A technology of mobile communication system and random access channel, applied in transmission system, wireless communication, radio transmission system, etc.

Active Publication Date: 2015-06-03
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the received RoT does not exceed the target RoT, thus preventing degradation of system performance

Method used

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  • Apparatus and method for transmitting and receiving enhanced RACH in a mobile communication system
  • Apparatus and method for transmitting and receiving enhanced RACH in a mobile communication system
  • Apparatus and method for transmitting and receiving enhanced RACH in a mobile communication system

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Embodiment Construction

[0045] Matters defined in the specification, such as detailed construction and elements, are provided to help comprehensive understanding of the present invention. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0046] Embodiments of the invention will be described in the context of data being sent on the E-DCH when data is sent in a RACH transmission procedure, eg in a UMTS communication system.

[0047] Figure 4 Describe the change of RoT in the traditional physical layer RACH transmission procedure.

[0048] refer to Figure 4 , the vertical axis 402 represents the uplink RoT, while the horizontal axis 404 represents time. Before the RACH transmission procedure starts, the UE is aware of the RACH transmiss...

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Abstract

A method for transmitting an enhanced Random Access CHannel (RACH) in a User Equipment (UE) in a mobile communication system is provided, in which the UE transmits an uplink preamble to a Node B and upon receipt of an ACKnowledgment (ACK) for the uplink preamble, transmits an Enhanced Uplink Dedicated CHannel (E-DCH) and a Dedicated Physical Control CHannel (DPCCH) to the Node B. The transmission of the DPCCH starts before the transmission of the E-DCH. The time of the DPCCH transmission prior to the E-DCH transmission is proportional to the E-DCH TTI. Accordingly, the transmission starting time of E-DCH depends on the E-DCH TTI.

Description

technical field [0001] The present invention generally relates to an uplink communication device and method in a mobile communication system. More particularly, the present invention relates to an apparatus and method for transmitting and receiving a Random Access Channel (RACH) in a mobile communication system. Background technique [0002] Third generation (3G) mobile communication system or Universal Mobile Telecommunications Service (UMTS) operating on Wideband Code Division Multiple Access (WCDMA) based on European System for Mobile Communications, Global System for Mobile Communications (GSM) and General Packet Radio Service (GPRS) Provides consistent services for sending packet-based text, digitized voice or video data, and multimedia data at 2Mbps or above to mobile or computer users throughout the world. [0003] Specifically, the UMTS system uses a transport channel that attempts to improve the performance of uplink packet transmission from a user equipment (UE) t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04B7/26
CPCH04B7/2606H04W74/004H04W72/21
Inventor 金泳范许允亨李周镐金银晶
Owner SAMSUNG ELECTRONICS CO LTD
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