Method for determining re-transmitting data block size and base station, data transmission method

Abstract

The invention discloses a method for determining the size of a retransmission data block, a base station, and a data transmission method. During the data transmission process, when the receiver feeds back NACK to request retransmission, the resource quantity allocation unit of the base station allocates system resources required for retransmission The number of units is less than the number of system resource units allocated for the initial transmission of the system, the scheduler schedules system resource units for the retransmission process according to the allocation result, and the retransmission data block size setting unit of the base station determines the retransmission data block size according to the scheduling result; The transmitted data block. Since the present invention first determines the system resource when retransmitting, and then determines the amount of retransmitted data according to the transmission capacity of the determined system resource, it can ensure that the size of the retransmitted data block completely matches the amount of retransmitted system resources, avoiding system resource transmission It reduces the waste of capacity, reduces the signaling information that needs to be transmitted, and reduces the complexity of system resource scheduling.

Description

technical field [0001] The present invention relates to communication technology, in particular to a hybrid automatic repeat request (HARQ, Hybrid Automatic Repeat request) technology in the communication field. Background technique [0002] With the increasing demand for high-speed multimedia data services, wireless communication requires wider frequency band resources to meet the transmission of broadband data services, and the limited utilization of frequency bands has become a bottleneck restricting the development of broadband data services. How to maximize the data transmission rate, that is, how to maximize the frequency band utilization efficiency has become one of the key links of the third generation mobile communication and future communication systems. At the same time, the demand for high-speed multimedia services has prompted the wireless mobile communication system to adopt new technologies to increase the transmission rate and system capacity. [0003] Curre...

AI Technical Summary

Problems solved by technology

[0017] However, the main disadvantage of the above-mentioned prior art solution 1 is that the amount of data transmitted during retransmission may be too much, which may easily cause waste of system resources

[0021] However, the main disadvantage of the above-mentioned prior art solution 2 is: since the scheduling of system resources has a minimum allocation unit, reducing the size of the data block during retransmission may cause the size of the data block to not completely match the capacity of the allocated system resources

[0023] When this scheme is applied to adaptive HARQ, the amount of resources that need to be scheduled during retransmission is also related to the modulation mode during retransmission, and will change adaptively, so the system resource scheduling and MCS selection algorithms are more complicated

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