US Patent No. 9,444,601

METHOD AND DEVICE TO DETERMINE WHEN TO PERFORM HYBRID AUTOMATIC REPEAT REQUEST (HARQ) COMBINATION


Patent No. 9,444,601
Issue Date September 13, 2016
Title Method And Device To Determine When To Perform Hybrid Automatic Repeat Request (harq) Combination
Inventorship Wei Zhang, Shenzhen (CN)
Feng Wang, Shenzhen (CN)
Dandan Guo, Shenzhen (CN)
Ming Fang, Shenzhen (CN)
Yao Wang, Shenzhen (CN)
Assignee ZTE CORPORATION, Shenzhen (CN)

Claim of US Patent No. 9,444,601

1. A method and a base station for Hybrid Automatic Repeat Request HARQ combination, comprising:
receiving a data packet embedded with externally configured parameters relevant to the HARQ combination from a User Equipment
(UE), and calculating an identifier ddr2switch of Double-Data-Rate Two (DDR2) switching, to acquire addresses involved before
and after the HARQ combination;

wherein, the ddr2switch is an identifier indicating whether ping-pong switching is performed on the DDR2;
determining, according to the parameters and the addresses involved before and after the HARQ combination, whether the HARQ
combination is needed to be performed;

when the HARQ combination is needed to be performed:
reading data in DDR2,
storing data into a first data cache random access memory RAMA, and
calculate a HARQ combination on the read data stored in the first RAMA;
storing the calculated HARQ combination into a second data cache random access memory RAMB; and
transferring the calculated HARQ combination in the RAMB into the DDR2 to reduce both storage space of the DDR2 and transfer
times of data of the DDR2;

wherein the received externally configured parameters relevant to HARQ combination comprise:
new ue indicating whether the data packet sent by a User Equipment, the UE is a new packet;
e_demodnum indicating current transmission is which demodulation of the same UE;
harq_en indicating whether the HARQ combination is needed to be performed;
harq_num indicating a times of retransmission for the HARQ combination;
harq_addr indicating an address related to the HARQ combination; and
two gain factors b1 and b2 for the HARQ combination.