Data transmission method and device for uplink in radio communication

Abstract

The embodiment of the invention provides a data transmission method for an uplink chain in wireless communication. When MAC-es SDU needs to be cut and processed, an MAC-es SDU is cut by an MAC-es protocol entity of a terminal side; and HARQ is mixed and automatically retransmitted by the MAC-es protocol entity of the terminal side. The embodiment of the invention also provides a data transmission method for an uplink chain in wireless communication, which is as follows: receiving MAC-es PDU transmitted by the MAC-es protocol entity of a network side; detecting MAC-es SDU segment cut in MAC-es PDU by the MAC-es protocol entity of the network side; carrying out reordering, macro diversity and combination on the MAC-es PDU; carrying out segment package on the MAC-es SDU segment; and carrying out demux on the MAC-es SDU. By cutting and segment package, the invention can solve the problems that the MAC-es protocol entity of the terminal side only supports the sizes of several fixed and limited RLC PDU, and has no function of cutting the PLC PDU.

Description

technical field [0001] The invention relates to the communication field, in particular to an uplink data transmission method and device in wireless communication. Background technique [0002] A typical communication system is developed according to a layered protocol. The lowest layer is Layer 1, which is the physical layer (PHY, Physical), and Layer 2 consists of the Radio Link Control sublayer (RLC, Radio LinkControl) and the Media Access Control layer (MAC, Medium Access Control) composition. In the current research of 3GPP, the downlink peak rate of the wireless side and the downlink transmission efficiency of layer 2 have been improved to a considerable extent, while the uplink enhancement technology of the wireless side is on the research agenda of 3GPP, and "enhanced layer 2 uplink" has become its research A focus in . [0003] In the current standard, on the terminal side, the two enhanced dedicated transport channel protocol entities MAC-es protocol entity and MA...

AI Technical Summary

Problems solved by technology

When the wireless environment changes, especially when the RLC retransmission is caused by good or bad, because the MAC-es protocol entity supports several fixed MAC-es service data unit (SDU, Service Data Unit) sizes, it does not support variable RLC PDU sizes. It also does not have the function of dividing RLC PDU, and there may be a high HARQ residual error rate

[0006] In addition, in the case of enhanced random access channel (RACH, Random Access Channel), for the MAC-e PDU transmitted for the first time, the problem of terminal contention conflict resolution is also more serious, but the current MAC-e PDU cannot distinguish each terminal

At the same time, in the current uplink transmission, the mapping from the Common Control Channel (CCCH, Common Control Channel) to the Enhanced Dedicated Transport Channel (E-DCH, Enhanced Dedicated Transport Channel) is not supported.

In this way, the terminal not only has a large control plane delay in idle mode, CELL_FACH state, CELL_PCH state and URA_PCH state, but also is not conducive to the unification of uplink transmission channels for terminals supporting enhanced RACH

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