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Random accessing method based on E-DCH transmission channel in TD-SCDMA system

A TD-SCDMA and random access technology, applied in the field of wireless communication, can solve problems such as collision, data interruption, failure, etc., and achieve the effects of avoiding signaling interaction, saving time delay, and saving resource overhead

Inactive Publication Date: 2009-09-16
王芳伟
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In the CELL_FACH state, interactive and background packet services are generally performed, and data is prone to interruption, so UE will frequently initiate E-RUCCH access, and E-RUCCH occupies system random access resources. Collision is prone to occur, resulting in failure; even if E-RUCCH can be sent successfully at one time, it will bring a lot of delay to UE

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  • Random accessing method based on E-DCH transmission channel in TD-SCDMA system
  • Random accessing method based on E-DCH transmission channel in TD-SCDMA system
  • Random accessing method based on E-DCH transmission channel in TD-SCDMA system

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Embodiment Construction

[0042] For the service characteristics of CELL_FACH state, the present invention provides a kind of random access method based on E-DCH transmission channel under CELL_FACH state in TD-SCDMA system, comprises the following steps (see figure 2 ):

[0043] 201. The UE sends an uplink synchronization code through the UpPCH channel; wherein: the uplink synchronization code is a dedicated synchronization code for uplink access in the enhanced CELL_FACH state, or the UpPCH subchannel where the UpPCH channel is sent is the uplink access in the enhanced CELL_FACH state The dedicated UpPCH sub-channel, or the combination of the uplink synchronization code and the UpPCH sub-channel is dedicated for uplink access in the enhanced CELL_FACH state;

[0044] 202. After the Node B detects the uplink synchronization code of the UE, if it determines that it is an uplink access in the enhanced CELL_FACH state, it returns an acknowledgment on the FPACH channel, which carries E-DCH resource infor...

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Abstract

The invention provides a random accessing method based on E-DCH at a CELL FACH state in a TD-SCDMA system, which comprises the following steps: firstly, UE sends an uplink synchronous code through an UpPCH channel, wherein the uplink synchronous code is a special synchronous code for enhancing uplink accessing at the CELL FACH state, or the UpPCH channel is a special sub UpPCH channel for enhancing uplink accessing at the CELL FACH state, or the combination of the uplink synchronous code and the sub UpPCH channel is specially for enhancing uplink accessing at the CELL FACH state; secondly, after NodeB detects the uplink synchronous code of the UE, confirmation is fed back on a fast physical accessing channel (FPACH) and carries with E-DCH resource information if the uplink synchronous code is determined to be the uplink synchronous code special for enhancing uplink accessing at CELL FACH state wherein; thirdly, UE sends data on authorized E-DCH resources.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a random access method based on an E-DCH transmission channel in a CELL_FACH state in a TD-SCDMA system. Background technique [0002] 3GPP (3rd Generation Partnership Project, third generation mobile communication partnership organization) is currently working on the standardization of CELL_FACH (Cell_Forward Access Channel) state uplink enhancement. CELL_FACH uplink enhancement introduces E-DCH (enhanced-dedicated transport channel) transport channel in CELL_FACH state to enhance the uplink packet data transmission performance in this state, so that it can obtain smaller packet transmission delay and higher transmission rate. [0003] E-DCH transmission is commonly referred to as HSUPA (High Speed ​​Uplink Packet Access, High Speed ​​Uplink Packet Access). HSUPA uses advanced physical layer technology to obtain high transmission efficiency. In versions before 3GPP Rel-7, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04W76/02H04B7/26
Inventor 陈慧李群
Owner 王芳伟
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