Random access method, user equipment, base station and system

A technology for random access and user equipment, applied in electrical components, wireless communication and other directions, can solve the problems of increasing UE power consumption, large random access delay, etc., to reduce random access delay, save power overhead, improve The effect of quality of service

Inactive Publication Date: 2015-07-01
RDA CHONGQING MICROELECTRONICS TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0005] Although the existing technology can reduce the UE random access delay in the contention-based random access process, since the random access response window is up to 10 subframes, the UE needs to detect each subframe in the random access response window , it can be determined that the eNB has not returned the corresponding random access response, which not only increases the power consumption of the UE, but also has a large random access delay

Method used

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  • Random access method, user equipment, base station and system
  • Random access method, user equipment, base station and system
  • Random access method, user equipment, base station and system

Examples

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Embodiment Construction

[0018] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. In the drawings, the thickness of regions and layers are exaggerated for clarity. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0019] The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the invention. However, one skilled in the art will appreciate that the technical soluti...

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Abstract

The invention provides a random access method. The method comprises the following steps: transmitting a randomly-selected random access preamble; and receiving a random access response message, and if a conflict indication area in the random access response message indicates that a conflict occurs, ending a current random access process, and retransmitting a randomly-reselected random access preamble; alternatively, if the conflict indication area in the random access response message indicates that the conflict occurs, judging the priority of current random access, and if the priority is high, sending a random access message 3, and continuing the current random access process, otherwise, ending the current random access process, and retransmitting the randomly-reselected random access preamble. Through adoption of the method, the random access delay can be reduced, and the power consumption of user equipment is saved.

Description

technical field [0001] The present invention relates to a random access method, in particular to a contention-based random access method and system. Background technique [0002] LTE (Long Term Evolution, long-term evolution) is the long-term evolution of the UMTS (Universal Mobile Telecommunications System, Universal Mobile Communications System) technical standard formulated by 3GPP (The3rd Generation Partnership Project, Third Generation Partnership Project), LTE-A ( The Long Term Evolution-Advanced (LTE) system is a further enhancement of the LTE system. In LTE or LTE-A system, random access plays a very important role. In the following five scenarios, random access process is required: 1) initial access; 2) connection reestablishment after wireless link failure; 3) Switching; 4) In the connected state, when the uplink is out of sync, there is downlink data to be sent; 5) In the connected state, when the uplink is out of sync, there is uplink data to be sent. According...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
CPCH04W74/0833
Inventor 黄宗治杨萍冯侨
Owner RDA CHONGQING MICROELECTRONICS TECH CO LTD
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