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Data receiving, transmitting and processing method and equipment for data link layer

A technology of data link layer and processing equipment, applied in the field of communication

Active Publication Date: 2010-12-29
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] LTE-A (Long Term Evolution-Advance, Long Term Evolution and Upgrade) system design requires UE downlink up to 1Gbps uplink up to 500Mbps peak rate, calculated based on the upper limit of IP packets of 1500bytes, every TTI layer 2 needs to be processed and cascaded high-level At least 84 data packets are required. Even considering that the actual data packets may be less than 1500 bytes, the processing capability requirements for layer 2 will be higher. Therefore, the disadvantage of the existing technology is that the existing processing design is not necessarily It can meet the requirements of the peak rate and processing capacity of the LTE-A system

Method used

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  • Data receiving, transmitting and processing method and equipment for data link layer
  • Data receiving, transmitting and processing method and equipment for data link layer
  • Data receiving, transmitting and processing method and equipment for data link layer

Examples

Experimental program
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Embodiment 1

[0092] Figure 5 It is a schematic diagram of PDCP concatenation in Embodiment 1. This embodiment is used to illustrate the concatenation of successively occurring PDCP SDUs of the same length during transmission in the first mode, and the number of concatenations is indicated in the PDCP PDU header; and When receiving, the PDCP SDU implementation manner is identified from the PDCP PDU according to the number of concatenations indicated by the PDCP PDU header.

[0093] Before the arrival of the transmission format instruction sent by the MAC layer, PDCP completes the header compression of a certain amount of PDCP SDUs, and then properly concatenates the PDCP SDUs. Number of concatenation, in the implementation, you can use the reserved bit 3bit in the header structure as the number of concatenation (Num) indication, in the specific implementation, you can use 000 to represent no concatenation, and 001 to represent two concatenations of the same length packets, and so on. The...

Embodiment 2

[0096] Figure 6 It is a schematic diagram of PDCP cascading in Embodiment 2. This embodiment is used to illustrate the concatenation of consecutively occurring fixed-length PDCP SDUs when sending in the second mode, and the number of concatenations is configured by the upper layer; and when receiving The implementation manner of identifying the PDCP SDU from the PDCP PDU according to the number of concatenations configured by the upper layer.

[0097]Before the MAC layer sends the transmission format indication, after PDCP completes the header compression of a certain amount of PDCP SDUs, the PDCP SDUs are properly concatenated. The rules for concatenating PDCP SDUs can be configurable only for frequently occurring PDCP SDU lengths. The concatenation of PDCP SDUs with irregular lengths is not concatenated. In this mode, there is no need to add a length indication field in the header structure, and the concatenated data packets are uniformly encrypted, and finally form a PDCP ...

Embodiment 3

[0100] Figure 7 It is a schematic diagram of PDCP concatenation in Embodiment 3. This embodiment is used to illustrate that in the third mode, PDCP SDU concatenation can be concatenated based on the algorithm or the number of bytes configured by the high layer, and indicated in the PDCP PDU header The length of each PDCP SDU except the last one; and when receiving, identify the implementation of the PDCP SDU from the PDCP PDU according to the length of each PDCP SDU except the last one indicated by the PDCP PDU header.

[0101] Before the MAC layer sends the transmission format indication, after PDCP completes the header compression of a certain amount of PDCP SDUs, it will properly concatenate the PDCP SDUs. The length of the concatenated PDCP SDUs is determined by the high-level configuration or algorithm, and the length indication needs to be added to the header structure. domain, the concatenated data packets are uniformly encrypted, and finally form a PDCP PDU and send i...

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Abstract

The invention discloses a data receiving, transmitting and processing method and data receiving, transmitting and processing equipment for a data link layer. The method comprises the following steps of: performing hearder compression on a packet data convergence protocol layer service data unit in a packet data convergence protocol layer and cascading the packet data convergence protocol layer service data unit; encrypting the cascaded packet data convergence protocol layer service data unit to form a packet data convergence protocol layer packet data unit and transmitting the packet data convergence protocol layer packet data unit to a radio link control layer; and after a transport format indication transmitted by a media access control layer is received, processing a radio link controllayer service data unit in the radio link control layer to form a radio link control layer packet data unit and transmitting the radio link control layer packet data unit. Requirements on high-speed service transmission as well as high transmission speed and processing complexity of a long term evolution upgrade system can be met.

Description

technical field [0001] The present invention relates to communication technology, in particular to a data link layer data sending and receiving processing method and equipment. Background technique [0002] figure 1 It is a schematic diagram of the structure of the uplink data link layer (Layer 2, layer 2). As shown in the figure, in the LTE (Long Term Evolution, long-term evolution) system, user data packets arrive at PDCP (Packet Data Convergence Protocol, packet data convergence protocol) Layer, after performing operations such as header compression, encryption, and header structure addition by PDCP, a PDCP PDU (Packet Data Unit, packet data unit) is formed and sent to the RLC (Radio Link Control, radio link control) layer. The RLC layer further performs appropriate concatenation, segmentation (segmentation) on these RLC SDUs (Service Data Unit, business data unit) according to the requirements of the specific transmission format of the MAC layer, and adds a header struc...

Claims

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Application Information

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IPC IPC(8): H04W80/02H04L29/06
Inventor 刘佳敏李国庆
Owner DATANG MOBILE COMM EQUIP CO LTD
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