Data sending 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 sending and processing method and equipment for data link layer
  • Data sending and processing method and equipment for data link layer
  • Data sending and processing method and equipment for data link layer

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Experimental program
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Embodiment 1

[0068] Figure 5 It is a schematic diagram of data block cascading preprocessing, as shown in the figure, before the low-level sending instruction arrives, PDCP completes a certain amount of PDCP SDU header compression and encryption operations to construct PDCP PDU and send it to the RLC layer; then in the data block preprocessing stage RLC The layer can concatenate the RLC SDUs and generate the corresponding header length indication. After the MAC layer sends the format indication, it can be grouped according to the actual required PDU size.

[0069] It can be seen from the figure that in the data block cascading preprocessing stage, the data blocks N to N+K have been cascaded, and the corresponding LI is generated 0 +E to LI K-1 +E, when the MAC layer transmits the format instruction, it can directly intercept the concatenated RLC SDU of the indicated length to form the data part of the RLC PDU. This part is shown by the payload in the figure, and LI+E Added to the header...

Embodiment 2

[0071] Figure 6 It is a schematic diagram of data block cascading preprocessing under CA, as shown in the figure, considering that the LTE-A system introduces CA technology, the number of RLC PDUs sent per TTI is related to the number of carriers. Before the arrival of the instruction sent by the lower layer, PDCP completes operations such as head compression and encryption of a certain amount of PDCP SDUs to construct a PDCP PDU and send it to the RLC layer. Then in the data block preprocessing stage, the RLC layer can concatenate the RLC SDU and generate the corresponding header length indication. After the MAC layer sends the format indication, it can be grouped according to the multiple PDU sizes actually required by each carrier. .

[0072] by the example Figure 6 It can be seen from that, in the data block cascading preprocessing stage, the data blocks N to N+K have been cascaded, and the corresponding LI 0 +E to LI K +E, and in the grouping stage, three RLC PDUs a...

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Abstract

The invention discloses a data sending and processing method and data sending and processing equipment for a data link layer. The data sending and processing method for the data link layer comprises the following steps of: receiving a packet data unit of a packet data aggregation protocol layer; cascading a service data unit of a wireless link control layer and generating a corresponding length indication; after receiving a transmission format indication sent by a media access control layer, selecting the cascaded service data unit of the wireless link control layer according to the length indication in the transmission format indication to generate a load part of the packet data unit of the wireless link control layer, adding the length indication which corresponds to the selected service data unit of the wireless link control layer to a head, and forming the packet data unit of the wireless link control layer; and sending the formed packet data unit of the wireless link control layer. The data sending and processing method and the data sending and processing equipment for the data link layer can meet the requirement of high-speed service transmission, and also can meet the demands of high transmission speed and high processing complexity of a long-term evolution updating system.

Description

technical field [0001] The invention relates to communication technology, in particular to a data transmission processing method and equipment of a data link layer. 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 adding header structure 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 lower layer, and adds a header structure to form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/06H04W80/02H04L1/00
Inventor 刘佳敏许芳丽
Owner DATANG MOBILE COMM EQUIP CO LTD
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