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RLC ARQ method for cross-base-station carrier aggregation system, and base station

A carrier aggregation, cross-base station technology, applied in the field of communication, can solve the problems of resource waste transmission efficiency, low data scheduling priority, SCellMAC unable to schedule data in time, etc.

Active Publication Date: 2018-01-09
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] If the RLC ARQ process in the intra-eNB carrier aggregation system is used, the following problems will exist: PCell RLC sends data to SCell RLC in advance, and during the process of scheduling and transmitting the data by SCell MAC, it may be due to the data scheduling priority is relatively low, causing SCell MAC to fail to schedule the data in time
In fact, the SCell MAC has not yet scheduled the data, and will continue to transmit the data for the first time, which will cause the PCell and SCell to transmit the same data, resulting in a waste of resources and a reduction in transmission efficiency

Method used

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  • RLC ARQ method for cross-base-station carrier aggregation system, and base station
  • RLC ARQ method for cross-base-station carrier aggregation system, and base station
  • RLC ARQ method for cross-base-station carrier aggregation system, and base station

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Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0150] The process of PCell RLC entity performing RLC ARQ based on the data transmission status message sent by SCell is as follows: Figure 7 As shown, the details are as follows:

[0151] Step 701: PCell configures a cross-eNB cell as an inter-station SCell, and activates the SCell;

[0152] Step 702: The PCell RLC entity sends the data PDU to the SCell RLC entity in advance, and the SCellMAC entity schedules and transmits the data PDU;

[0153] Step 703: The SCell RLC entity sends a data transmission status message to the PCell RLC entity according to the transmission status of the data PDU;

[0154] Step 704: The PCell RLC entity receives the RLC status report sent by the terminal, and performs an ARQ process on the data PDU indicated as NACK in the RLC status report, as follows:

[0155] For data PDUs transmitted on the PCell side and indicated by NACK in the RLC status report, the normal ARQ process is performed; for data PDUs transmitted on the SCell side and indicate...

no. 2 Embodiment

[0159] The process of the PCell RLC entity performing RLC ARQ based on the retransmission indication message is as follows: Figure 8 As shown, the details are as follows:

[0160] Step 801: PCell configures a cross-eNB cell as an inter-station SCell, and activates the SCell;

[0161]Step 802: The PCell RLC entity sends the data PDU to the SCell RLC entity in advance, and the SCellMAC entity schedules and transmits the data PDU;

[0162] Step 803: The PCell RLC entity receives the RLC status report sent by the terminal, and performs a normal ARQ process on the data PDU indicated as NACK in the RLC status report;

[0163] Step 804: The PCell RLC entity starts the ARQ process for the data PDUs transmitted on the SCell side and indicated as NACK in the RLC status report, and sends a retransmission indication message to the SCell RLC. The RB identifier of inter-site carrier aggregation, the sequence number of the data PDU that needs to be retransmitted on the RB, etc.;

[0164]...

no. 3 Embodiment

[0166] The process of the PCell RLC entity performing RLC ARQ based on the retransmission indication message and the data transmission status message sent by the SCell is as follows: Figure 9 As shown, the details are as follows:

[0167] Step 901: PCell configures a cross-eNB cell as an inter-station SCell, and activates the SCell.

[0168] Step 902: The PCell RLC entity sends the data PDU to the SCell RLC entity in advance, and the SCellMAC entity schedules and transmits the data PDU.

[0169] Step 903: The SCell RLC entity sends a data sending status message to the PCell RLC entity according to the transmission status of the data PDU.

[0170] Step 904: The PCell RLC entity receives the RLC status report sent by the terminal, and performs an ARQ process on the data PDU indicated as NACK in the RLC status report, as follows:

[0171] For data PDUs transmitted on the PCell side and indicated as NACK in the RLC status report, the normal ARQ process is performed; for data PD...

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Abstract

The invention discloses an RLC ARQ method for a cross-base-station carrier aggregation system, and a base station, and is used for providing a solution for an RLC ARQ process of the cross-base-stationcarrier aggregation system. The method comprises the steps that a main cell obtains a data transmitting state message sent by an auxiliary cell, wherein the data transmitting state message comprisesa serial number of a data PDU (protocol data unit), which has completed the initial transmission, on an RB (radio bearer) which carries out the cross-base-station carrier aggregation on UE, and the RBis located on an RLC (radio link control) entity of the auxiliary cell, and the main cell and the auxiliary cell belongs to different base stations covering the UE at the same time; The main cell determines the serial number of the data PDU which needs to start an ARQ (automatic retransmission request) process on the RB according to the data transmitting state message, and starts the ARQ processfor the data PDU which needs to start the ARQ process on the RB.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an RLCARQ method and a base station of a cross-base station carrier aggregation system. Background technique [0002] With the popularization of smart terminals, the service requirements of mobile communication networks are increasing geometrically, and spectrum resources are limited and non-renewable resources. The spectrum resources of the Long Term Evolution (LTE) system are relatively discrete. The carrier aggregation technology can aggregate continuous or discrete carriers together, which meets the large bandwidth requirements of the LTE system and can greatly improve the user equipment (UE) capacity. peak rate. [0003] 3GPP LTE-A defines protocol standards related to intra-site carrier aggregation, but in actual networking scenarios, the UE may be located in the overlapping coverage of two base stations, rather than in the overlapping coverage of multiple c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L5/00
Inventor 齐丙花徐明宇寇会如刘蓉
Owner DATANG MOBILE COMM EQUIP CO LTD
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