Method for improving performance of synchronous non-self-adapting mixed automatic retransmission
A hybrid automatic retransmission and non-adaptive technology, which is applied in the direction of using the return channel for error prevention/detection, multi-frequency code system, etc., can solve the problems of high retransmission times and reduced combining gain, so as to improve the combining gain of retransmission , avoid the effect of increasing the number of retransmissions and increasing signaling overhead
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Embodiment 1
[0036] The mapping period in this embodiment is greater than the superframe, such as figure 2 Shown: 5 radio frames are included in one mapping period. In each radio frame including eight subframes SF0 to SF7, the synchronized HARQ subframes are fixed to SF2 and SF3. The entire synchronous HARQ subframe is a distributed resource allocation area. The subcarrier mapping method of the synchronized HARQ subframe is as follows: the synchronized HARQ subframe of the first radio frame adopts subcarrier mapping mode 1, the synchronized HARQ subframe of the second radio frame adopts subcarrier mapping mode 2, ..., and so on By analogy, the synchronous HARQ subframe to the fifth radio frame adopts subcarrier mapping mode 5. The subcarrier mapping method changes periodically in one mapping period, that is to say, the subcarrier mapping method in the next mapping period is still the same as figure 2 The subcarrier mapping method shown in . In this way, the physical sub-carriers used...
Embodiment 2
[0039] The change of the carrier mapping method in this embodiment takes one superframe as the mapping period. . like image 3 As shown, in one superframe composed of four radio frames, in each radio frame including eight subframes SF0 to SF7, the synchronous HARQ subframes are fixed to SF3 and SF4. A part of the synchronous HARQ subframe is a distributed resource allocation area, and the other part is a centralized resource allocation area. The subcarrier mapping method is as follows: the distributed resource allocation area in the synchronous HARQ subframe of the first radio frame adopts the subcarrier mapping method 1, and the distributed resource allocation area in the synchronous HARQ subframe of the second radio frame adopts the subcarrier mapping method 1. Carrier mapping mode 2, ..., and so on, the subcarrier mapping mode 4 is adopted for the distributed resource allocation area in the synchronous HARQ subframe to the fourth radio frame. In this way, in fact, since ...
Embodiment 3
[0043] A mapping period in this embodiment includes 3 radio frames, and the synchronized HARQ subframes in each radio frame including 8 subframes are fixed as SF2 and SF3. In the radio frame of this mapping period, the entire area of some synchronous HARQ subframes is a distributed resource allocation area, some areas of some synchronous HARQ subframes are distributed resource allocation areas, and the other part is a centralized resource allocation area , and the ratio of these two allocation areas is variable. The subcarrier mapping method is as follows: the distributed resource allocation area in the synchronous HARQ subframe of the first radio frame adopts the subcarrier mapping method 1, and the distributed resource allocation area of the synchronous HARQ subframe of the second radio frame adopts the subcarrier mapping method. Mapping mode 2, ..., and so on. In this way, the physical sub-carriers of the initial transmission of HARQ and each retransmission are differe...
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