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Method and apparatus for synchronizing ue and senb on usage 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

Active Publication Date: 2019-08-23
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 apparatus for synchronizing ue and senb on usage of new configuration parameters
  • Method and apparatus for synchronizing ue and senb on usage of new configuration parameters

Examples

Experimental program
Comparison scheme
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 process on one cell (for example, cell 1) trigger the transmission of autonomous uplink control information on another cell (for example, cell 2). Therefore, the technical solution of Embodiment 1 does not need to perform the 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 has completed its RRC configuration / reconfiguration of one or more cells of the SeNB, the UE should suspend its autonomous uplink control information transmission on all these cells until the SeNB’s A PRACH process on any cell is triggered and ends. In other words, after a PRACH on any cell of the SeNB ends, the UE will start autonomous uplink control information transmission on all c...

Embodiment 2

[0064] Embodiment 2: Define a new MAC CE to control the transmission of autonomous uplink control information

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

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

[0067] Manner 2: A MAC CE only triggers the UE to adopt new configuration parameters on some cells.

[0068] For me...

Embodiment 3

[0071] Embodiment 3: Redefine the activation / deactivation of MAC CE to control the transmission of UE's autonomous uplink control information

[0072] As discussed above, the technical solution of Embodiment 2 is very flexible. It only needs one byte or two bytes of data load to synchronize the UE and SeNB in ​​the use of new configuration parameters, but it requires additional Define a new MAC CE. In Embodiment 3, the current activated / deactivated MAC CE is reused 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 activation / deactivation MAC CE indicating the SPcell bit. For this situation, it is necessary to redefine the bits 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 is 1, it indicates that the UE should use...

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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