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Method and base station for retransmitting packets

A technology of data packets and base stations, which is applied in data exchange details, data exchange networks, and devices that provide special services in branches, etc. It can solve the problems of missing alarms, reducing the reliability of retransmitted data packets, and difficult to guarantee retransmission of data packets, etc. achieve the effect of improving reliability

Active Publication Date: 2008-10-22
HUAWEI TECH CO LTD
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  • Claims
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Problems solved by technology

In this way, there is no doubt that the phenomenon of missing alarms has been caused, and the reliability of retransmitting data packets has been reduced.
Especially when the total number of UEs in the cell is not large, if the number of UEs that need to send NACK signals is small, it is difficult to ensure that the UEs that need to send NACK signals can normally retransmit data packets using existing methods

Method used

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  • Method and base station for retransmitting packets
  • Method and base station for retransmitting packets
  • Method and base station for retransmitting packets

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Embodiment Construction

[0031] In some embodiments of the present invention, a negative acknowledgment NACK signal from the user terminal UE is received; the user ratio that sends the NACK signal is determined, and the user ratio is the ratio of the number of UEs that send the NACK signal to the number of all UEs in the cell Ratio: when it is determined according to the proportion of users who send NACK signals that data packets need to be resent, resend data packets to the users who send NACK signals.

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0033] image 3 It is a flow chart of the method embodiment of the present invention, such as image 3 As shown, the method according to the embodiment of the present invention includes the following steps:

[0034] Step 300: Determine the power calibration valu...

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Abstract

The invention discloses a method and a base station for retransmitting a data packet. The method comprises the following steps of: determining a user proportion transmitting the NACK signal receiving a negative acknowledgement NACK signal from a user terminal UE, wherein the user proportion is a ratio of the number of UE transmitting the NACK signal and the number of all UE in the cell; and retransmitting the data packet to the user transmitting the NACK signal when the data packet is required to be retransmitted according to the user proportion transmitting the NACK signal, thereby guaranteeing the reliability of feedback. Furthermore, before acquiring the ratio of the users transmitting the NACK signal occupying the total number of users in the cell, the method performs equal probability grouping to the UE through a random number; after grouping, the number of the UE requiring transmitting the NACK signal in each group is equal, thereby reducing severe power peak effect occurring ina feedback channel.

Description

technical field [0001] The invention relates to multimedia multicast / multicast technology, in particular to a method and a base station for retransmitting data packets in multimedia multicast / multicast service (MBMS, Multimedia Broadcast / Multicast Service). Background technique [0002] It is one of the important services in the long-term evolution (LTE, Long Time Evolution) to implement the MBMS service on the Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) multi-carrier technology. MBMS mainly means that the network sends the same multimedia data to multiple receivers in the network. [0003] At present, people's demand for mobile communication is no longer satisfied with telephone and message services. With the rapid development of the Internet (Internet), a large number of mobile multimedia services have emerged. Among them, some mobile multimedia services require multiple users to receive the same data at the same time, suc...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04Q7/22H04L12/18H04L12/56H04L45/74
Inventor 周晓王俊伟
Owner HUAWEI TECH CO LTD
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