Transmission timing adjustment method and device

1. A transmission timing adjustment method, comprising:

determining, by a base station, a transmission delay between user equipment (UE) and the base station;

generating, by the base station, a timing advance (TA) quantized value according to the transmission delay, wherein the TA quantized value comprises a base value and an offset value, quantization precision of the base value is first quantization precision MTs, quantization precision of the offset value is second quantization precision NTs, M is a positive integer less than or equal to 16, N is a nonnegative integer less than M, and Ts has a value of 1/30.72 μs, wherein

when M is less than 16, and N is 0, the generating the TA quantized value comprises:

quantizing the transmission delay according to the first quantization precision MTs, to obtain the quantized value of the transmission delay, wherein the quantized value of the transmission delay is the TA quantized; and

sending, by the base station, the TA quantized value to the UE for uplink transmission timing adjustment of the UE.

2. The method according to claim 1 , wherein the transmission delay is a timing advance T ADV , wherein

during random access, T ADV =(eNB Rx−Tx time difference); or

during non-random access, T ADV =(eNB Rx−Tx time difference)+(UE Rx−Tx time difference),

wherein the “eNB Rx−Tx time difference” represents a difference between a receiving time and a transmitting time of the base station, and the “UE Rx−Tx time difference” represents a difference between a receiving time and a transmitting time of the UE.

3. A transmission timing adjustment method, comprising:

receiving, by user equipment (UE), a timing advance (TA) quantized value sent by a base station, wherein the TA quantized value comprises a base value and an offset value, quantization precision of the base value is first quantization precision MTs, quantization precision of the offset value is second quantization precision NTs, M is a positive integer less than or equal to 16, N is a nonnegative integer less than M, and Ts has a value of 1/30.72 μs;

determining, by the UE, a transmission timing adjustment amount according to the TA quantized value; and

performing, by the UE, uplink transmission timing adjustment according to the transmission timing adjustment amount, wherein

when M is less than 16, N is 0, the TA quantized value is the base value.

4. The method according to claim 3 , wherein during random access, the transmission timing adjustment amount is N TA , N TA =T A _ BASE *M+T A _ OFFSET *N, a unit of N TA is Ts, T A _ BASE is the base value, and T A _ OFFSET is the offset value; or

during non-random access, the transmission timing adjustment amount is N TA,new , N TA,new =N TA,old +(T A _ BASE −m)*M+T A _ OFFSET *N, a unit of N TA,new is Ts, N TA,old is a previous transmission timing adjustment amount, T A _ BASE is the base value, T A _ OFFSET is the offset value, m is [a maximum value of T A _ BASE /2], and represents rounding up or rounding down.

5. A base station, comprising:

a processor; and

a non-transitory computer readable storage medium, wherein the non-transitory computer readable storage medium stores a program which, when the program is executed by the processor, causes the processor to perform:

determining a transmission delay between user equipment (UE) and the base station;

generating a timing advance (TA) quantized value according to the transmission delay, wherein the TA quantized value comprises a base value and an offset value, quantization precision of the base value is first quantization precision MTs, quantization precision of the offset value is second quantization precision NTs, M is a positive integer less than or equal to 16, N is a nonnegative integer less than M, and Ts has a value of 1/30.72 μs; and

sending the TA quantized value to the UE for uplink transmission timing adjustment of the UE, wherein when M is less than 16, and N is 0,

the generating the TA quantized value comprises:

quantizing the transmission delay according to the first quantization precision MTs, to obtain the quantized value of the transmission delay, wherein the quantized value of the transmission delay is the TA quantized value.

6. The base station according to claim 5 , wherein the transmission delay is a timing advance T ADV , wherein

during random access, T ADV =(eNB Rx−Tx time difference); or

during non-random access, T ADV =(eNB Rx−Tx time difference)+(UE Rx−Tx time difference),

wherein the “eNB Rx−Tx time difference” represents a difference between a receiving time and a transmitting time of the base station, and the “UE Rx−Tx time difference” represents a difference between a receiving time and a transmitting time of the UE.

7. User equipment, comprising:

a processor; and

a non-transitory computer readable storage medium, wherein the non-transitory computer readable storage medium stores a program which, when the program is executed by the processor, causes the processor to perform:

receiving a timing advance (TA) quantized value sent by a base station, wherein the TA quantized value comprises a base value and an offset value, quantization precision of the base value is first quantization precision MTs, quantization precision of the offset value is second quantization precision NTs, M is a positive integer less than or equal to 16, N is a nonnegative integer less than M, and Ts has a value of 1/30.72 μs;

determining a transmission timing adjustment amount according to the TA quantized value; and

performing uplink transmission timing adjustment according to the transmission timing adjustment amount, wherein when M is less than 16 and N is 0,

the TA quantized value is the base value.

8. The user equipment according to claim 7 , wherein during random access, the transmission timing adjustment amount is N TA , N TA =T A _ BASE *M+T A _ OFFSET *N, a unit of N TA is Ts, T A _ BASE is the base value, and T A _ OFFSET is the offset value; or

during non-random access, the transmission timing adjustment amount is N TA,new , N TA,new =N TA,old +(T A _ BASE −m)*M+T A _ OFFSET *N, a unit of N TA,new is Ts, N TA,old is a previous transmission timing adjustment amount, T A _ BASE is the base value, T A _ OFFSET is the offset value, m is [a maximum value of T A _ BASE /2], and [ ] represents rounding up or rounding down.