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Method and device for synchronization of UE and SeNB for use of new configuration parameters

A new configuration and parameter technology, applied in the field of communication systems, can solve the problem of PRACH resource overhead and other issues

Active Publication Date: 2015-11-25
ALCATEL LUCENT SHANGHAI BELL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This existing solution is feasible for scenarios 1, 5 and 7, because PRACH is always required for these scenarios; while for scenarios 2, 3, 4 and 6, although no uplink PRACH is required for uplink synchronization, it has to be triggered The redundant PRACH process is only used to synchronize UE and SeNB on the use of new configuration parameters, such as synchronizing UE and SeNB on UE autonomous uplink transmission
This will cause additional overhead on PRACH resources

Method used

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  • Method and device for synchronization of UE and SeNB for use of new configuration parameters
  • Method and device for synchronization of UE and SeNB for use of new configuration parameters

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Embodiment 1: The PRACH process on one cell triggers the transmission of uplink control information on another cell

[0053]The main idea of ​​Embodiment 1 is to make the PRACH procedure in one cell (for example, cell 1) trigger the transmission of autonomous uplink control information in another cell (for example, cell 2). Therefore, the technical solution of Embodiment 1 does not need to perform a PRACH process on cell 2 because the SeNB wants to trigger the transmission of the UE's uplink control information on cell 2 .

[0054] Based on the technical solution of Embodiment 1, after the UE completes its RRC configuration / reconfiguration for one or more cells of the SeNB, the UE should suspend the transmission of its autonomous uplink control information on all these cells until the SeNB A PRACH procedure on any cell is triggered and ends. In other words, when a PRACH on any cell of the SeNB ends, the UE will start to transmit autonomous uplink control information ...

Embodiment 2

[0064] Embodiment 2: Define a new MACCE for controlling the transmission of autonomous uplink control information

[0065] For embodiment 2, a new MACCE is proposed for synchronizing UE and SeNB on when to adopt new configuration parameters. If the SeNB wants to trigger the UE to adopt new configuration parameters, the SeNB will issue a new MACCE to instruct the UE to adopt the new configuration parameters. That is to say, in Embodiment 2, a newly designed MACCE is used instead of the PRACH procedure to synchronize UE and SeNB on the use of new configuration parameters. Therefore, compared with the existing solution, the cost of embodiment 2 is less. Specifically, a new MACCE can be designed in the following two ways.

[0066] Mode 1: A MACCE triggers the UE to adopt new configuration parameters on all cells where it has completed configuration / reconfiguration.

[0067] Way 2: One MACCE only triggers the UE to adopt new configuration parameters on some cells.

[0068] Fo...

Embodiment 3

[0071] Embodiment 3: Redefining the activation / deactivation of MACCE for controlling the transmission of UE's autonomous uplink control information

[0072] As discussed above, the technical solution of Embodiment 2 is very flexible, only one byte or two bytes of data load is needed to realize the synchronization between UE and SeNB in ​​the use of new configuration parameters, but it requires additional Define a new MACCE. However, Embodiment 3 reuses the currently activated / deactivated MACCE to achieve this purpose. For this, a new UE behavior needs to be defined:

[0073] -Principle 1: When the UE completes the RRC configuration / reconfiguration on the SPCell, the UE should check the bit indicating the SPcell in the activation / deactivation MACCE. For this situation, it is necessary to redefine the bit indicating the SPcell to indicate whether the UE should start its autonomous uplink transmission with new configuration parameters on the SPcell. For example, if the bit i...

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Abstract

The invention provides a method and device for the synchronization of UE and an SeNB for the use of new configuration parameters in a double-connection communication system. Specifically, the ending of one PRACH process of any one cell of the SeNB serves as the triggering, so as to achieve the synchronization of UE and the SeNB for the use of new configuration parameters. The SeNB enables a new defined MAC CE to be transmitted to the UE and to serve as the triggering, so as to synchronize the UE and the SeNB for the use of new configuration parameters. The SeNB enables a redefined activation / deactivation MAC CE to be transmitted to the UE and to serve as the triggering, so as to synchronize the UE and the SeNB for the use of new configuration parameters. The SeNB enables a scheduling command to be transmitted to the UE and to serve as the triggering, so as to synchronize the UE and the SeNB for the use of new configuration parameters.

Description

technical field [0001] The present invention relates to a communication system, and in particular to a method and a device for synchronizing UE and SeNB on the use of new configuration parameters in a dual connectivity communication system. Background technique [0002] According to the current dual connectivity (DC) state, there may be multiple cells configured for the secondary cell group (SCG) on the small cell base station (SeNB), one of these cells is used as a special primary cell (SPcell), and the others are used as ordinary From cells (Scells). The main function of the SPcell is to perform PUCCH transmission. At present, it has been agreed that after being added, SPcell is always active throughout its life cycle, which is similar to Pcell defined in R10. For an SCG cell, whether it is an SPcell or a Scell, it must have autonomous uplink control information (UCI) transmission, such as uplink SRS, uplink PUCCH and uplink CQI / PMI / RI, etc. Of course, the uplink PUCCH o...

Claims

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Application Information

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IPC IPC(8): H04W56/00
Inventor 杨涛钱德瑞卡·沃拉尔
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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