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Adaptive retransmission method and user equipment in frequency spectrum polymerization system

A spectrum aggregation and user equipment technology, applied in the field of adaptive retransmission method and user equipment, adaptive retransmission mechanism, can solve the problem that the carrier frequency cannot work alone, and achieve the effect of ensuring operation, improving performance, and ensuring normal efficiency

Inactive Publication Date: 2014-08-13
夏普高科技研发(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The third type is extended carrier frequency, that is, this type of carrier frequency cannot work alone in the system, and must work with other non-extended carrier frequencies. In addition, according to further understanding, PDCCH may not be transmitted on this carrier frequency

Method used

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  • Adaptive retransmission method and user equipment in frequency spectrum polymerization system
  • Adaptive retransmission method and user equipment in frequency spectrum polymerization system
  • Adaptive retransmission method and user equipment in frequency spectrum polymerization system

Examples

Experimental program
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Effect test

Embodiment 1

[0065] Such as Figure 5 As shown, the PDCCH and PDSCH for the user equipment to transmit data for the first time and retransmit data can be freely allocated on different carrier frequencies. Such as Figure 5 As shown, assume that the user equipment is assigned five segments of downlink carrier frequencies, respectively denoted as carrier frequency A to carrier frequency E, each segment of carrier frequency corresponds to an independent HARQ entity in one scheduling period, and each HARQ entity corresponds to 8 HARQ processes . Such as Figure 5 The carrier frequency A shown in may correspond to the HARQ processes A0-A7 in the HARQ entity A. Since the PDCCH and PDSCH of the LTE-Advanced user equipment transmission data block can be allocated on different carrier frequencies, assuming that the PDCCH of a certain transmission block of the user equipment is transmitted on the carrier frequency B for the first time, the corresponding HARQ entity is the carrier frequency B cor...

Embodiment 2

[0077] Such as Figure 6 As shown, the PDCCH for the user equipment's first data transmission and retransmission data can be freely allocated on different carrier frequencies, while the PDSCH for the first data transmission and retransmission data is restricted to be allocated on the same carrier frequency. Such as Figure 6 As shown, assume that the user equipment is assigned five segments of downlink carrier frequencies, respectively denoted as carrier frequency A to carrier frequency E, each segment of carrier frequency corresponds to an independent HARQ entity in one scheduling cycle, and each HARQ entity corresponds to 8 HARQ processes . Such as Figure 6 The carrier frequency A shown in may correspond to the HARQ processes A0-A7 in the HARQ entity A. Since the PDCCH and PDSCH of the data block transmitted by the LTE-Advanced user equipment can be allocated on different carrier frequencies, assuming that the PDSCH transmitted for the first time by a certain transmissio...

Embodiment 3

[0085] Such as Figure 7 As shown, the PDSCH for the user equipment's first data transmission and retransmission data can be freely allocated on different carrier frequencies, while the PDCCH for the first data transmission and retransmission data is restricted to be allocated on the same carrier frequency. Such as Figure 7 As shown, assume that the user equipment is assigned five segments of downlink carrier frequencies, respectively denoted as carrier frequency A to carrier frequency E, each segment of carrier frequency corresponds to an independent HARQ entity in one scheduling period, and each HARQ entity corresponds to 8 HARQ processes . Such as Figure 7The carrier frequency A shown in may correspond to the HARQ processes A0-A7 in the HARQ entity A. Since the PDCCH and PDSCH of the LTE-Advanced user equipment transmission data block can be allocated on different carrier frequencies, assuming that a certain transmission block of the user equipment is transmitted on th...

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Abstract

The invention discloses adaptive hybrid automatic repeat request (HARQ) technology, is applied to a system adopting frequency spectrum polymerization technology and provides a method for implementing adaptive HARQ by crossing carriers. The scheme is simple and effective, and the normal and high-efficiency work of the system is guaranteed. Particularly, an adaptive retransmission method comprises the following steps of: detecting physical downlink control channel (PDCCH) on a carrier and acquiring HARQ information; judging whether the HARQ information is retransmission data according to NDI in the HARQ information, and acquiring an HARQ process number in the system; reading CCI in the PDCCH, allocating related information according to resources in the PDCCH, and acquiring transmitted data from the carrier indicated by the CCI, if the NDI indicates the retransmission data, reading rv in the HARQ information, merging the acquired data with data in a soft cache corresponding to the HARQ process number of the system, accessing the merged data into the soft cache, performing cyclic redundancy check (CRC) on the data in the soft cache, if the data is verified to be accurate, transmitting an acknowledgement (ACK) signal to a base station, otherwise transmitting a negative acknowledgement (NACK) signal to the base station.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method for realizing an adaptive retransmission mechanism in LTE-Advanced and 4G systems. According to the present invention, an adaptive retransmission method and user equipment in a spectrum aggregation system are proposed. Background technique [0002] As early as in its RAN1#53bis meeting, 3GPP determined that the downlink bandwidth of the LTE-Advanced system will use spectrum aggregation (Carrier Aggregation) technology, which can support a system bandwidth greater than 20MHz. This brings more flexibility to the design of the downlink control channel, and also brings many new challenges to its subsequent related mechanisms (such as adaptive retransmission mechanism). [0003] After discussion at the 3GPP TSG RAN157 meeting, two optional downlink control channel structures for LTE-Advanced systems are temporarily reserved (Summary of email discussion on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/04H04L1/16
Inventor 黄磊刘仁茂张应余梁永明丁铭
Owner 夏普高科技研发(上海)有限公司
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