Method, device and system for receiving data under ACK (Acknowledgement Character)/NACK(Negative Acknowledgement) repeating mechanism
A technology of downlink data and mechanism, applied in the field of mobile communication, can solve the problems of waste of power resources, UE cannot grasp the correct timing of monitoring PDCCH, and scheduling work cannot be carried out normally, so as to ensure the normal progress and avoid waste of power resources.
Active Publication Date: 2013-10-23
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology
[0004] The inventors found that under the repeated ACK / NACK mechanism, the UE's feedback needs to occupy several uplink subframes continuously, so it will have an impact on the existing minimum RRT (Round-Trip Time, round-trip time), and the existing technology does not rely on Considering this impact, the configuration of its RRT timer (RRT timer) is still carried out in the existing way, resulting in the UE not being able to grasp the correct timing of monitoring the PDCCH, for example: monitoring too early, resulting in waste of power resources
In addition, when the UE is configured with DRX, if the DRX configuration is unreasonable, when the network side schedules the UE, the UE may have entered a dormant state, causing the scheduling work to fail
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[0044] Based on the existing problems in the prior art, the present invention provides a data receiving scheme under the repeated ACK / NACK mechanism, which reconfigures the RRT timer in response to the delay caused by the repeated ACK / NACK, so that the UE can monitor the PDCCH reasonably .
[0045] For the sake of clarity, the following first briefly introduces the technical terms or terms that appear below:
[0046] LTE, Long Term Evolution, that is, long-term evolution;
[0047] TDD, Time Division Duplexing, real-time division duplexing;
[0048] FDD, Frequency Division Duplexing, namely frequency division duplexing;
[0049] Regular RRT, Round-Trip Time, that is, regular round trip time, refers to the time from the network side sending certain data to receiving the ACK / NACK feedback and being able to perform data transmission again under the regular ACK / NACK feedback mechanism. For example, in an LTE FDD system, the minimum round-trip time can be equal to the downlink data transmis...
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The embodiment of the invention discloses a method and a device for receiving data under a ACK (Acknowledgement Character) / NACK(Negative Acknowledgement) repeating mechanism. The method comprises the following steps: receiving downlink data and timing; monitoring a downlink physical control channel when the timing reaches the preconfigured round-trip time of a repeating feedback mechanism; receiving subsequent downlink data according to a control signaling loaded by the downlink physical control channel; and ensuring that the round-trip time of the repeating feedback mechanism is equal to the summation of the conventional round-trip time and the difference value of the time for feeding back the ACK / NACK for the last time and the time for feeding back the ACK / NACK for the first time. The embodiment of the invention also discloses a method and a device for configuring the round-trip time under the repeating mechanism as well as a communication system. The embodiment of the invention considers the time delay caused by the feedback of the repeated ACK / NACK and thereby reconfigures a RTT(Round-trip time) timer, so that UE(User Equipment) can determine the time for monitoring PDCCH(Physical Downlink Control Channel) and avoid the waste of electricity energy resources caused by prematurely monitoring the PDCCH.
Description
Technical field [0001] The present invention relates to the field of mobile communication technology, and more specifically, to a data receiving method and device under a repeated ACK (Acknowledgement, acknowledgement notification) / NACK (Negative Acknowledgment, error notification) mechanism. Background technique [0002] In a communication system, a UE (User Equipment) receives downlink data or sends uplink data according to a control command issued by the network side. During data transmission, the UE monitors the control channel PDCCH (Physical Downlink Control Channel, physical downlink control channel), and if there is a downlink control command for the terminal, it demodulates the downlink data sent by the network side according to the downlink control command. [0003] In order to ensure the reliability of data transmission, HARQ (Hybrid Automatic Repeat Request, Hybrid Automatic Repeat Request) technology was introduced and developed. In the communication system, the receiv...
Claims
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IPC IPC(8): H04L1/18
Inventor 杨晓东谌丽
Owner DATANG MOBILE COMM EQUIP CO LTD