Distributed data transmission method and device based on TM RLC (Transparent Mode Radio Link Control) protocol and TM RLC entity

Abstract

Embodiments of the invention disclose a distributed data transmission method and device based on a TM RLC (Transparent Mode Radio Link Control) protocol and a TM RLC entity. A central transmission cache is arranged in the TM RLC entity. The method comprises a step that the central transmission cache sends a TM RLC SDU (Service Data Unit) to a corresponding branch wireless link in a form of TM RLC SUD burst cluster after receiving the TM RLC SDU. The technical scheme of the embodiments of the invention can be compatible with the existing TM RLC protocol stack function and the time delay brought by the discontinuous transmission and has good expansibility to quickly support a large amount of users.

Description

technical field [0001] The present invention relates to wireless data distribution transmission technology, in particular to a distributed data transmission method and device based on TM RLC protocol, and TM RLC entity. Background technique [0002] As a complete entity, the transparent mode radio link control (TMRLC, Transparent Mode Radio Link Control) protocol entity in the radio link layer control (RLC, Radio Link Control) protocol performs data packet sending and receiving processing. The 5G network architecture proposes a distributed architecture for the access network. The air interface protocol stacks run on different distributed entities, and the transmission between distributed entities is non-ideal. Taking the RCC-RRS (RCC: Radio Cloud Center, RRS: Remote Radio System) distributed architecture as an example, the transmission between RCC-RRS is non-ideal transmission, so it is necessary to consider the separation and weight of the protocol stack function under non-...

AI Technical Summary

Problems solved by technology

This scheme has the following problems: 1. It is necessary to add a sorting function to data packets in the PDCP protocol. This method confuses the functional division of RLC and PDCP, and destroys the principle of functional division of the protocol stack that only RLC is responsible for data packet sorting; 2. 1. It is necessary to add a complete set of sequential sending and receiving reordering mechanisms to the PDCP protocol, which greatly changes the PDCP protocol stack; 3. In the current protocol, PDCP does not need to process data in transparent mode (TM, Transparent Mode). If PDCP supports the sorting function of data packets, for the completeness of protocol functions, it is necessary to increase the processing of TM mode

4. When PDCP sorts through the serial number (SN, Serial Number) of PDCP PDU, it is possible to sort PDCP PDUs sent by multiple RLCs, resulting in high complexity and prolonged sorting.

5. When reestablishment (reestablishment), because the time for data and control information between RLC and PDCP is too long after non-ideal transmission, a new delay is added to the reestablishment process

Images