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Control element canceling method and device, and terminal

A cell and media control access technology, applied in the field of communication, can solve the problems that the base station cannot know the actual situation of the terminal and cannot send MACCE in time

Inactive Publication Date: 2018-03-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unlicensed carriers and licensed carriers can be used through carrier aggregation or dual connectivity. Unlicensed carriers are generally used as a supplement to data transmission, that is, licensed carriers are used as primary serving cells, and unlicensed carriers are used as secondary serving cells. However, , although the MAC CE can be sent through an unlicensed carrier, but because the unlicensed carrier resources need to be used through the competition of LBT (Listen before talk), in this scenario, the MAC CE group packet is completed and submitted to the physical After the layer, cancel the MAC CE, then, when the execution result of LBT fails, the terminal cannot send the MAC CE to the base station in time, resulting in the base station not being able to know the actual situation of the terminal

Method used

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  • Control element canceling method and device, and terminal
  • Control element canceling method and device, and terminal
  • Control element canceling method and device, and terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] An embodiment of the present invention provides a control cell cancellation method, figure 1 It is a schematic flowchart of a method for canceling a control cell in an embodiment of the present invention, such as figure 1 As shown, the method includes:

[0039] S101: When the trigger condition is met, generate a MAC CE;

[0040] Wherein, the above trigger conditions include any one or more of the following: when the arriving uplink data has a higher priority than the currently prepared data or when the uplink data arrives, there is currently no ready data, the uplink resource allocation is received and filled The byte is greater than or equal to the BSR, the BSR periodic timer expires, the retransmission BSR timer expires and there is currently ready data, the periodic report timer expires, the configuration of the PHR changes, and the secondary serving cell (Scell, Secondary cell) is activated. The power backoff caused by power control exceeds the specified threshold...

Embodiment 2

[0048] Based on the first embodiment above, in order to timely cancel the MAC CE, it can be implemented in the following manner:

[0049] In an optional embodiment, S102 and S103 may include: performing the LBT process on the unlicensed carrier cell of the base station; when it is determined that the LBT process is successful, sending the MAC CE to the base station through the unlicensed carrier cell, and canceling the MAC CE.

[0050] Among them, the terminal performs an LBT process on the unlicensed carrier cell of the base station, completes the LBT process, and determines that the LBT process is successful, sends the MAC CE in the physical layer of the unlicensed carrier cell to the base station through the unlicensed carrier cell, and then cancels The MAC CE in the MAC layer of the terminal; that is to say, when the LBT process is performed and the LBT process is successful, the MAC CE is sent to the base station in time and then the MAC CE is canceled, so that the base st...

Embodiment 3

[0058] Based on the second embodiment above, further, in order to ensure the accuracy of the MAC CE sent to the base station by the terminal, it may be implemented in the following manner:

[0059] In an optional embodiment, S102 and S103 may include: performing the LBT process on the unlicensed carrier cell of the base station, and updating the number of failures when the LBT process fails; when the updated number of failures does not exceed the preset number of times, repeat Execute the steps of performing the LBT process on the unlicensed carrier cell of the base station, and updating the number of failures when the LBT process fails; when the LBT process is determined to be successful and the number of failed updates after the update does not exceed the preset number of times, send the MAC CE through the unlicensed carrier cell To the base station, cancel the MAC CE.

[0060] Among them, the terminal performs an LBT process on the unlicensed carrier cell of the base statio...

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Abstract

The invention discloses a control element canceling method. The control element canceling method comprises generating a media access control layer control element MAC CE when a trigger condition is satisfied; carrying out LBT (listen before talk) to a non-authoritative carrier cell of a base station; and canceling the MAC CE after obtaining an execution result of the LBT. The invention also discloses a control element canceling device and a terminal.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, device and terminal for controlling cell cancellation. Background technique [0002] In the Long Term Evolution system (LTE, Long Term Evolution), the Media Access Control (MAC, MediaAccess Control) layer mainly provides data transmission and wireless resource allocation through logical channels, and completes Hybrid Automatic Repeat Request (HARQ, Hybrid ARQ), Scheduling (SCH, Scheduling), priority processing and multiplexing and demultiplexing (MUX, Multiplexing) and other functions; the content sent by the MAC layer includes high-level data, MAC layer control cells (MAC CE, MACControl Element), or filling padding; MAC CE has uplink and downlink, the uplink mainly includes buffer status report (BSR, Buffer Status Report), power headroom report (PHR, Power Headroom Report), etc. [0003] When a terminal in the connected state needs to send uplink data, if there is no...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04W16/14H04W74/08
CPCH04W16/14H04W74/0808H04W72/21
Inventor 陈中明
Owner ZTE CORP
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