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Switching method and switching device

A switching device and post-switching technology, applied in the field of communication, can solve problems such as unsatisfactory lossless switching, and achieve the effect of ensuring user experience

Active Publication Date: 2018-10-26
YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned existing technology can well guarantee the lossless handover when the traditional communication mode (communication between the base station and the UE) is switched, but when the UE switches from the traditional communication mode to the direct communication (D2D) mode, the existing technology Cannot meet the requirements of lossless switching, so a new switching scheme is needed to ensure lossless switching

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  • Switching method and switching device

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Embodiment Construction

[0042] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0043] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0044] image 3 A schematic flowchart of a handover method according to an embodiment of the present invention is shown.

[0045] Such as image 3 As shown, the switching method according to the e...

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Abstract

The present invention provides a switching method and a switching device, wherein the switching method includes: the first terminal and the second terminal perform direct communication; after initiating the communication mode switching, it is determined that the first terminal has not succeeded in the direct communication mode. Data packets transmitted to the second terminal; the first terminal performs data interaction with the second terminal through the first base station, the core network and the second base station, and transmits the unsuccessfully transmitted data packets to the second terminal. Through the technical solution of the present invention, the problem of retransmission of lost data packets when switching from the direct connection communication mode to the traditional communication mode is solved, the bit error rate is reduced, and the requirement of lossless switching is met.

Description

technical field [0001] The present invention relates to the technical field of communications, and in particular, to a switching method and a switching device. Background technique [0002] In the current LTE (Long Term Evolution) protocol technology, lossless switching during switching between uplink and downlink data transmission can be realized through data packet forwarding rules. [0003] In order to ensure the lossless switching of "uplink" data during switching, the terminal (UE) will retransmit the PDCP data packets stored in the PDCP (Packet Data Convergence Protocol, Packet Data Convergence Protocol) retransmission buffer, figure 1 This process is described. [0004] In this example, the PDCP entity initiates the transmission of PDCP data packets with sequence numbers 1 to 5, among which packets No. 3 and No. 5 are not received by the source eNB, for example, HARQ (Hybrid Automatic Repeat, hybrid automatic repeat request) is interrupted due to handover transmissi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/18
CPCH04W36/18
Inventor 张晨璐张云飞董贤东
Owner YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD