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: 2013-03-13
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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Effect test

Embodiment 1

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

[0093] Before the transmission format indication sent by the MAC layer arrives, after PDCP completes the header compression of a certain amount of PDCP SDUs, the PDCP SDUs are appropriately concatenated. The rule for concatenating PDCP SDUs can be adopted to only perform variable number of consecutive PDCP SDUs of the same length. Concatenation of numbers, in the implementation, the reserved bit 3bit can be used in the header structure to indicate the number of concatenations (Num). packets, and so on. The concatenated data...

Embodiment 2

[0096] Image 6 It is a schematic diagram of PDCP cascading in Embodiment 2. This embodiment is used to illustrate that in the second mode, continuous PDCP SDUs of fixed length are cascaded during transmission, and the number of concatenations is configured by the high layer; and when receiving The implementation of identifying the PDCP SDU from the PDCP PDU according to the number of concatenations configured by the upper layer.

[0097]Before the transmission format indication sent by the MAC layer arrives, after PDCP completes the header compression of a certain amount of PDCP SDUs, the PDCP SDUs are appropriately concatenated. The rule for concatenating PDCP SDUs can be configured only for the frequently occurring PDCP SDU lengths. In this way, the length indicator field does not need to be added to the header structure, and the concatenated data packets are uniformly encrypted, and finally the PDCP PDU is formed and sent to the RLC layer. The RLC layer waits for the arri...

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 method, the concatenation of PDCP SDUs can be concatenated based on the algorithm or the number of bytes configured by the high layer during transmission, and indicated in the PDCP PDU header. The length of each PDCP SDU except the last one; and the implementation of the PDCP SDU is identified from the PDCP PDU according to the length of each PDCP SDU except the last one indicated by the PDCP PDU header when received.

[0101] Before the transmission format indication sent by the MAC layer arrives, after PDCP completes the header compression of a certain amount of PDCP SDUs, the PDCP SDUs are appropriately concatenated. The length of the concatenated PDCP SDUs is determined by the high-level configuration or algorithm, and a length indication needs to be added to the header structure. domain, the concatenated data packets are uniformly encry...

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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 control layer 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 structural diagram 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, the user data packet reaches the PDCP (Packet Data Convergence Protocol, packet data convergence protocol) layer , after PDCP performs operations such as header compression, encryption, and header structure addition, 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 structure to form an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04W80/02
Inventor 刘佳敏李国庆
Owner DATANG MOBILE COMM EQUIP CO LTD
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