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Realizing method of semi-static dispatching downlink transmission

A technology of semi-static scheduling and implementation method, applied in the field of LTE, can solve the problems of LTE user downlink peak rate reduction, peak rate loss, etc., and achieve the effect of avoiding merging failure and saving signaling overhead.

Inactive Publication Date: 2010-02-10
POTEVIO INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For VoIP, its typical rate is in the range of 10-20Kbps, while the downlink peak rate of LTE in 20M bandwidth is 100Mbps. One (n≥2) HARQ processes will reduce the peak downlink rate of LTE users by n / m
Especially for TDD mode, if the uplink and downlink subframes are configured as 0, the peak rate may be lost by half or more
[0027] 2. For how many HARQ processes are reserved, the current protocol stipulates that it is configured by RRC, that is, an additional 3-bit RRC signaling overhead is required to configure how many HARQ processes are reserved

Method used

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  • Realizing method of semi-static dispatching downlink transmission
  • Realizing method of semi-static dispatching downlink transmission
  • Realizing method of semi-static dispatching downlink transmission

Examples

Experimental program
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Effect test

Embodiment 1

[0069] In this embodiment, for each semi-persistently scheduled data packet, during the first transmission, the evolved base station sends the data packet twice consecutively, and if the evolved base station does not receive the confirmation information returned by the user terminal, the second During the second transmission, the evolved base station also sends the data packet twice consecutively. That is to say: in this embodiment, the two transmissions of the evolved base station all adopt the mode of bundled transmission.

[0070] On the UE side, the UE receives two consecutive data packets in the first transmission, combines the two received data packets, and then decodes the combined data packets. If the decoding is correct, it returns an acknowledgment to the evolved base station information (ACK), otherwise, return non-acknowledgment information (NACK) to the evolved base station; if there is a second transmission, then the UE also receives two consecutive data packets ...

Embodiment 2

[0084] In this embodiment, for each semi-persistently scheduled data packet, in the first transmission, the evolved base station only sends the data packet once, and if the evolved base station does not receive the confirmation information returned by the user terminal, it transmits the data packet for the second time. transmission, during the second transmission, the eNB sends the data packet three times consecutively. That is to say: in this embodiment, the eNB only adopts the bundling transmission method in the second transmission.

[0085] On the UE side, the UE receives a data packet in the first transmission and immediately decodes the data packet. If the decoding is correct, it returns an ACK to the evolved base station, otherwise, it returns a NACK to the evolved base station; if there is a second transmission , then the UE receives three consecutive data packets in the second transmission, combines the three received data packets, and then decodes the combined data pa...

Embodiment 3

[0094] In this embodiment, for each semi-persistently scheduled data packet, during the first transmission, the evolved base station sends the data packet three times consecutively, and if the evolved base station does not receive the confirmation information returned by the user terminal, the second transmission is performed. transmission, during the second transmission, the eNB sends the data packet only once. That is to say: in this embodiment, the eNB only adopts the bundling transmission method in the first transmission.

[0095] On the UE side, the UE receives three consecutive data packets in the first transmission, combines the three received data packets, and then decodes the combined data packets. If the decoding is correct, it returns ACK to the evolved base station, otherwise , return NACK to the evolved base station; if there is a second transmission, the UE only receives the data packet once in the second transmission, and immediately decodes the data packet, and...

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Abstract

The invention discloses a realizing method of semi-static dispatching downlink transmission. In the method, eNB only reserves an HARQ process for each user terminal for semi-static dispatching downlink transmission, and binding transmission is carried out on a data packet of semi-static dispatching so as to enable the maximum transportable times of each data packet during a transmission period corresponding to the data packet to be more than or equal to 4. The invention can lower the influence of an HARQ mechanism of semi-static dispatching downlink transmission on LTE downlink peak value speed to be lowest and can save signaling expense of RRC while ensuring normal combination of HARQ, and reduces the complexity of downlink dispatching while ensuring downlink dynamic data transmission speed.

Description

technical field [0001] The present invention relates to LTE technology, in particular to a method for realizing semi-persistent scheduling downlink transmission. Background technique [0002] In order to meet the challenges of broadband access technology and to meet the demands of new services, the international standardization organization 3GPP started its long-term evolution (LTE) technology standardization work at the end of 2004. [0003] The LTE system adopts downlink Orthogonal Frequency Division Multiple Access (OFDMA) and uplink Single Carrier Frequency Division Multiplexing (SC-FDMA) access methods, and introduces Multiple Input Output (MIMO) technology, which greatly improves the The transmission capability of the system effectively resists multipath interference, and can flexibly configure different bandwidths. In the case of 20M bandwidth, the goal of LTE is to achieve the peak transmission rate of uplink 50Mbps and downlink 100Mbps. [0004] In addition, the e...

Claims

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Application Information

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IPC IPC(8): H04W28/04H04L1/18H04W72/12
Inventor 白炜
Owner POTEVIO INFORMATION TECH
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