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Method and system for non-contention random access, network side network element and user equipment

A random access and user equipment technology, applied in electrical components, wireless communication, etc., to achieve the effect of quickly sending and receiving a large amount of data and shortening the time for cell access

Inactive Publication Date: 2013-02-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the above six events that trigger the random access process of the UE, (4) the arrival of downlink data in the RRC connection state requires a random access process, and (5) the arrival of uplink data in the RRC connection state requires a random access process, which will trigger Scell ​​execution Random access process, but does not exclude other events triggering the Scell ​​to perform the random access process, such as triggering the execution of the random access process when the Scell ​​is activated

Method used

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  • Method and system for non-contention random access, network side network element and user equipment
  • Method and system for non-contention random access, network side network element and user equipment
  • Method and system for non-contention random access, network side network element and user equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] In this example, Cell3 schedules itself. The opportunity for the UE in the Cell3 broadcast to send the random access preamble is prach-FreqOffset=10, prach-ConfigIndex=3 (subframe 1 of any radio frame can send the random access preamble).

[0086] Step 1, the base station sends the MAC CE to the UE. Image 6 It is a schematic diagram of MAC CE according to Embodiment 1 of the present invention, such as Image 6 As shown, in this example, the MAC CE includes a command to activate Cell3 and an opportunity to allow sending a random access preamble such as subframe 5. After receiving the command, the UE activates Cell3 and sends a common random access preamble;

[0087] Step 2, the base station receives the public random access preamble, calculates TA, generates a response message and sends it to the UE on the DL-SCH of Cell3, and the message contains TA; the message passes through the RA-RNTI on the PDCCH on Cell3 (or C -RNTI) for instructions;

[0088] Step 3: After o...

Embodiment 2

[0090] In this example, Cell2 and Cell3 schedule themselves, and the timing for the UE in the broadcast of Cell2 to send a random access preamble is prach-FreqOffset=10, prach-ConfigIndex=5 (subframe 7 of any radio frame can send random access preamble), the timing for the UE in the Cell3 broadcast to send the random access preamble is prach-FreqOffset=10, prach-ConfigIndex=3 (subframe 1 of any radio frame can send the random access preamble).

[0091] Step 1, the base station sends the MAC CE to the UE, Figure 7 It is a schematic diagram of the MAC CE of Embodiment 2 of the present invention, such as Figure 7 As shown, in this example, the MAC CE includes commands to activate Cell2 and Cell3, and includes the timing of allowing the sending of random access preambles on Cell2 such as subframe 5 and the timing of allowing sending of random access preambles on Cell3 such as subframe 3, After receiving the MAC CE, the UE activates Cell2 and Cell3, and sends a public random acc...

Embodiment 3

[0096] In this example, Cell2 and Cell3 schedule themselves.

[0097] Step 1, the base station sends the MAC CE to the UE, Figure 8a It is a schematic diagram of MAC CE according to Embodiment 3 of the present invention, as shown in Figure 8a As shown, in this example, the MAC CE includes a command to activate Cell2, and includes the UE's uplink authorization on Cell2 and Cell3, and the UE can send random access preamble or uplink data at the timing of the uplink authorization. After receiving the command, the UE activates Cell2 and Cell3 respectively, and sends the common random access preamble or uplink data on the uplink authorized subframe respectively;

[0098] Step 2, the base station receives the public random access preamble or uplink data on Cell2, calculates TA, generates a response message and sends it to the UE on the DL-SCH of Cell2, and the message contains TA; the message passes through the RA on the PDCCH on Cell2 -RNTI (or C-RNTI) to indicate;

[0099] St...

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Abstract

The invention discloses method for non-contention random access. The method includes: a network side sends an MAC (medium access control) CE (control element) to UE (user equipment), wherein random access opportunity information of cells or UL (uplink) grant information is set in the MAC CE; the UE sends random access guide to the cells according to the random access opportunity or sends random access guide or uplink data at opportunity indicated by UL grant; and the network side calculates TA (time adjustment) according to the received random access guide or uplink data and feeds back to the UE, and the UE successfully accesses to the cells to transmit and receive data normally. The invention further discloses a system for non-contention random access, a network side network element and the user equipment. Access of auxiliary service cells can be realized in a non-competitive way, cell access time is greatly shortened, and the requirement of the UE on quickness in mass data transceiving is met.

Description

technical field [0001] The present invention relates to a secondary serving cell access technology, in particular to a non-conflict random access method and system, a network element at the network side, and user equipment. Background technique [0002] In the wireless cellular communication system, the random access procedure (Random Access Procedure) is used for the UE (or called user equipment (UE, User Equipment)) in the idle state (RRC_IDLE) to initially access the network, or the UE in the connected state (RRC_CONNECTED) Perform uplink synchronization with the network and obtain resource allocation for subsequent data communication. [0003] In the Evolved Universal Terrestrial Radio Access Network (E-UTRAN, Evolved Universal Terrestrial Radio Access Network) of the Long Term Evolution (LTE, Long Term Evolution) system of the Third Generation Partnership Project (3GPP, Third Generation Partnership Project), the following six Several events can trigger the random acces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
CPCH04W74/08H04W74/006
Inventor 陈中明
Owner ZTE CORP
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