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Transmission mode switching method and device

A technology of transmission mode and switching device, which is applied in the field of communication and can solve problems such as undefined transmission mode

Active Publication Date: 2017-10-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, how to trigger switching between transmission modes has not been defined in the related art

Method used

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  • Transmission mode switching method and device
  • Transmission mode switching method and device
  • Transmission mode switching method and device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0039]Example 1: MAC sets a protection timer, and if the MAC does not receive a response from RRC to the transmission mode switching request within the time indicated by the protection timer, the original transmission mode is maintained.

[0040] In this example 1, considering that RRC may be too busy to process the transmission mode switching request and has no response to the transmission mode switching request, thus causing the MAC to be in the process of waiting for the RRC feedback reconfiguration completion notification for a long time, this preferred embodiment can The protection timer is set according to the preset time, and if the protection timer times out, the MAC will end the waiting process and enter the normal process. In this way, the transmission mode between the MAC and the UE can be avoided from being in an uncertain state for a long time, thereby improving transmission reliability.

example 2

[0041] Example 2: The MAC receives the first reconfiguration failure notification from the RRC, wherein the first reconfiguration failure notification is used to indicate that the RRC does not accept the transmission mode switching request; the original transmission mode is maintained between the MAC and the UE.

[0042] This example 2 considers that RRC may not accept the transmission mode switching request due to configuration reasons. In this preferred embodiment, when the MAC receives the reconfiguration failure notification that the RRC does not accept the transmission mode switching request, it will end the transmission mode switching as soon as possible. In the state of uncertain transmission mode caused by signaling interaction, the original transmission mode of the UE is maintained and a normal process is entered.

example 3

[0043] Example 3: MAC receives the second reconfiguration failure notification from RRC, wherein the second reconfiguration failure notification is used to indicate the reconfiguration failure of the transmission mode of the UE or the reconfiguration timeout of the RRC transmission mode; MAC and RRC perform abnormal processing.

[0044] Considering that UE may fail to reconfigure or RRC transmission mode reconfiguration timeout due to DCCH loss, for the first case that UE reconfiguration fails, UE will initiate a connection re-establishment request, that is, re-initiate random access, at this time MAC It will also enter the random access process; for the second case, the RRC transmission mode reconfiguration timeout is caused by DCCH loss. At this time, RRC cannot determine whether the UE reconfiguration is complete. The UE transmission mode is reconfigured, and the MAC can temporarily keep the original transmission mode unchanged.

[0045] Furthermore, the foregoing examples ...

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PUM

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Abstract

The invention discloses a method and a device for switching transmission modes. The method comprises the steps of: determining to carry out switching on the transmission modes by an MAC (Media Access Control); sending a transmission mode switching request to an RRC (Radio Resource Control), wherein the transmission mode switching request is used for requesting the RRC to carry out transmission mode reassortment on UE (User Equipment); and carrying out the transmission mode switching by the MAC according to a reassortment completion notice from the RRC, wherein the reassortment completion notice is used for indicating the completion of the reassortment of the transmission modes of the UE.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a transmission mode switching method and device. Background technique [0002] Eight downlink transmission modes are defined in the Long-Term Evolution (abbreviated as LTE) Release 9 protocol, among which transmission mode (Transmission Mode, abbreviated as TM) 1 is single-port port0 transmission; TM2 is transmit diversity mode; TM3 TM4's main transmission scheme is closed-loop spatial multiplexing; TM5's main transmission scheme is MU-MlMO; TM6 is single-layer precoding; TM7 The main transmission scheme of TM8 is single-stream beamforming (Beamforming, referred to as BF), which uses a single port port5 to transmit; TM8 supports dual-stream BF, which uses port7 and port8 to transmit, and also includes single-stream BF, which uses port7 or port8 to transmit . It should be noted that in addition to the main transmission scheme, TM3~TM8 also includes a transmit diversity transmi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/00H04W72/12H04L1/16
Inventor 付瑞颖
Owner ZTE CORP
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