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Methods for controlling random access to prevent collision between uplink messages in a mobile communication system

A mobile communication system, random access technology, applied in access restriction, transmission system, wireless communication, etc.

Inactive Publication Date: 2006-01-18
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0046] This problem may be more pronounced in MBMS implementations where multiple UEs simultaneously send RACH signals based on one group signaling message

Method used

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  • Methods for controlling random access to prevent collision between uplink messages in a mobile communication system
  • Methods for controlling random access to prevent collision between uplink messages in a mobile communication system
  • Methods for controlling random access to prevent collision between uplink messages in a mobile communication system

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Embodiment Construction

[0075] Now, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals designate the same or similar elements even if these elements are drawn in different drawings. In the following description, the message description will be omitted when a detailed description of well-known functions and configurations contained herein may make the subject matter of the present invention rather unclear.

[0076] The present invention can be applied to any communication service or any mobile communication system in which data is transmitted from a user equipment in uplink direction according to a random access scheme. In particular, the present invention can be more effectively used in Multimedia Broadcast / Multicast Service (MBMS) in which multiple UEs frequently transmit messages through random access simultaneously.

[0077] Therefore, the present invention will be described based on ...

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Abstract

A method for controlling random accesses of UE in a mobile communication system. The mobile communication system includes Node B, a RNC and a service node which provides information indicating the number of UE associated with group signaling to the RNC. When the UE respond to the group signaling, the RNC refers to the number of UE, calculates a back-off window value indicating a back-off range necessary for controlling the random accesses of the UE, contains the calculated value in a group signaling message, and transmits the message to the UE. The UEs randomly selects a back-off value within a range based upon the back-off window value and wait for a time period corresponding to the value, and transmit a response message, respectively. Therefore, collision and congestion of radio messages can be mitigated.

Description

technical field [0001] The present invention relates to a mobile communication system, and more particularly to a method for effectively providing transmission time interval information of uplink messages to prevent transmission of uplink messages through a random access channel (RACH) at the same time by a plurality of user equipments (UEs). A method for destructive collisions between messages. Background technique [0002] In a traditional general packet radio service (GPRS) based communication system, multiple user equipments (user equipment, UE) may use a random access channel (random access channel, RACH) to send uplink data. Traditionally, random access is performed to initiate any transmission operation when the UE generates data without being under the control of the system. Such random access enables efficient and practical use of the transmission frequency band without intensive channel monitoring operations of the system. [0003] In multimedia broadcast / multica...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04L12/18H04W4/06H04W74/08
CPCH04L12/1881H04W74/002H04W74/0833H04W4/06H04L12/189H04W74/08H04W48/08
Inventor 金成勋李国熙崔成豪
Owner SAMSUNG ELECTRONICS CO LTD
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