Method for information transmission, user equipment and access network entity

1. A method for information transmission, comprising:

transmitting, by a first User Equipment (UE), a first random access request to an access network entity, wherein the first random access request carries a first preamble and data; and

receiving, by the first UE, a random access response sent by the access network entity according to the first random access request,

wherein at least one time slot occupied by the first preamble reserves a guard interval, and the reserved guard interval of the first preamble is used to be multiplexed by a UE other than the first UE,

wherein the first preamble and the data are time division multiplexed, and a total power for transmitting each of data symbols of the data is the same as a total power for transmitting any other one of the data symbols of the data; or

the first preamble and the data are frequency division multiplexed, and a power of the first preamble is the same as a total power for transmitting data symbols of the data.

2. The method according to claim 1 , wherein a second random access request sent by a second UE and the first random access request are frequency division multiplexed, wherein the second random access request carries a second preamble.

3. The method according to claim 1 , wherein in a case that the first preamble and the data are frequency division multiplexed,

the first preamble and the data adopt different subcarrier spacings, and a guard frequency band is comprised between a plurality of subcarriers where the first preamble is located and a plurality of subcarriers where the data is located; or

the first preamble and the data adopt a same subcarrier spacing, the data occupies a plurality of different subcarriers, the plurality of subcarriers where the first preamble is located is arranged in the center of the plurality of subcarriers where the data is located, and a guard frequency band is comprised at both the outermost sides of the plurality of subcarriers where the data is located.

4. The method according to claim 1 , wherein the first preamble comprises one or more preamble sequences, and the first preamble and the data occupy one or more time slots;

the data has a multi-carrier waveform or a single-carrier waveform;

a length of the first preamble is the same as or different from a length of the data; and

a length of a cyclic prefix of the first preamble is the same as or different from a length of a cyclic prefix of the data.

5. The method according to claim 1 , wherein the first preamble and the data respectively occupy different time slots, at least one time slot occupied by the data reserves a guard interval, and the reserved guard interval of the data is used to be multiplexed by the UE other than the first UE.

6. A method for information transmission, comprising:

receiving, by an access network entity, a first random access request sent by a first user equipment (UE), wherein the first random access request carries a first preamble and data; and

transmitting, by the access network entity, a random access response to the first UE according to the first random access request,

wherein at least one time slot occupied by the first preamble reserves a guard interval, and the reserved guard interval of the first preamble is used to be multiplexed by a UE other than the first UE,

wherein the first preamble and the data are time division multiplexed, and a total power for transmitting each of data symbols of the data is the same as a total power for transmitting any other one of the data symbols of the data; or

the first preamble and the data are frequency division multiplexed, and a power of the first preamble is the same as a total power for transmitting data symbols of the data.

7. The method according to claim 6 , further comprising:

calculating, by the access network entity, a channel estimation result according to the first preamble; and

detecting and demodulating the data by the access network entity according to the channel estimation result.

8. The method according to claim 7 , wherein a length of a cyclic prefix of the data is less than a length of a cyclic prefix of the first preamble, and after the receiving, by the access network entity, the first random access request sent by the first UE, the method further comprises:

detecting, by the access network entity, the first preamble to obtain a timing offset between the first UE and the access network entity; and

determining, by the access network entity, a Fast Fourier Transformation (FFT) processing window for transmitting each of the data symbols of the data according to the timing offset; and/or

wherein the method further comprises: receiving, by the access network entity, a second random access request sent by a second UE, the second random access request comprising a second preamble, and the first random access request and the second random access request being frequency division multiplexed.

9. The method according to claim 6 , wherein in a case that the first preamble and the data are frequency division multiplexed,

the first preamble and the data adopt different subcarrier spacings, and a guard frequency band is comprised between a plurality of subcarrier where the first preamble is located and a plurality of subcarrier where the data is located; or

the first preamble and the data adopt a same subcarrier spacing, the data occupies a plurality of different subcarriers, the plurality of subcarriers where the first preamble is located is arranged in the center of the plurality of subcarriers where the data is located, and a guard frequency band is comprised at both the outermost sides of the plurality of subcarriers where the data is located.

10. The method according to claim 6 , wherein the first preamble comprises one or more preamble sequences, and the first preamble and the data occupy one or more time slots;

the data has a multi-carrier waveform or a single-carrier waveform;

a length of the first preamble is the same as or different from a length of the data; and

a length of a cyclic prefix of the first preamble is the same as or different from a length of a cyclic prefix of the data; or

wherein the first preamble and the data respectively occupy different time slots, at least one time slot occupied by the data reserves a guard interval, and the reserved guard interval of the data is used to be multiplexed by the UE other than the first UE.

11. A user equipment (UE), comprising:

a processor, a memory and a transceiver, wherein when reading programs from the memory, the processor is configured to:

transmit a first random access request to an access network entity, wherein the first random access request carries a first preamble and data; and

receive a random access response sent by the access network entity according to the first random access request;

wherein the transceiver is configured to receive and transmit data under the control of the processor,

wherein at least one time slot occupied by the first preamble reserves a guard interval, and the reserved guard interval of the first preamble is used to be multiplexed by a UE other than the first UE,

wherein the first preamble and the data are time division multiplexed, and a total power for transmitting each of data symbols of the data is the same as a total power for transmitting any other one of the data symbols of the data; or

the first preamble and the data are frequency division multiplexed, and a power of the first preamble is the same as a total power for transmitting data symbols of the data.

12. The UE according to claim 11 ,

wherein a second random access request sent by a second UE and the first random access request are frequency division multiplexed, the second random access request carrying a second preamble.

13. The UE according to claim 11 , wherein in a case that the first preamble and the data are frequency division multiplexed,

the first preamble and the data adopt different subcarrier spacings, and a guard frequency band is comprised between a plurality of subcarriers where the first preamble is located and a plurality of subcarriers where the data is located; or

the first preamble and the data adopt a same subcarrier interval, the data occupies a plurality of different subcarriers, the plurality of subcarriers where the preamble is located is arranged in the center of the plurality of subcarriers where the data is located, and a guard frequency band is comprised at both the outermost sides of the plurality of subcarriers where the data is located.

14. The UE according to claim 11 , wherein the first preamble comprises one or more preamble sequences, and the first preamble and the data occupy one or more time slots;

the data has a multi-carrier waveform or a single-carrier waveform;

a length of the first preamble is the same as or different from a length of the data; and

a length of a cyclic prefix of the first preamble is the same as or different from a length of a cyclic prefix of the data; or

wherein the first preamble and the data respectively occupy different time slots, at least one time slot occupied by the data reserves a guard interval, and the reserved guard interval of the data is used to be multiplexed by the UE other than the first UE.

15. An access network entity, comprising:

a processor, and a memory, wherein when reading programs from the memory, the processor is configured to perform steps of the method for information transmission according to claim 6 .

16. The access network entity according to claim 15 , wherein the processor is configured to:

calculate a channel estimation result according to the first preamble; and

detect and demodulate the data according to the channel estimation result.

17. The access network entity according to claim 16 , wherein a length of a cyclic prefix of the data is less than a length of a cyclic prefix of the first preamble, and the processor is configured to:

detect the first preamble to obtain a timing offset between the first UE and the access network entity; and

determine an FFT processing window for transmitting each of the data symbols of the data according to the timing offset; and/or

wherein the processor is further configured to:

receive a second random access request sent by a second UE, the second access random access request comprising a second preamble, and the first random access request and the second random access request being frequency division multiplexed.

18. The access network entity according to claim 15 , wherein in a case that the first preamble and the data are frequency division multiplexed,

the first preamble and the data adopt different subcarrier spacings, and a guard frequency band is comprised between a plurality of subcarriers where the first preamble is located and a plurality of subcarriers where the data is located; or

the first preamble and the data adopt a same subcarrier spacing, the data occupies a plurality of different subcarriers, the plurality of subcarriers where the preamble is located is arranged in the center of the plurality of subcarriers where the data is located, and a guard frequency band is comprised at both the outermost sides of the plurality of subcarriers where the data is located.

19. The access network entity according to claim 15 , wherein the first preamble comprises one or more preamble sequences, and the first preamble and the data occupy one or more time slots;

the data has a multi-carrier waveform or a single-carrier waveform;

a length of the first preamble is the same as or different from a length of the data; and

a length of a cyclic prefix of the first preamble is the same as or different from a length of a cyclic prefix of the data; or

wherein the first preamble and the data respectively occupy different time slots, at least one time slot occupied by the data reserves a guard interval, and the reserved guard interval of the data is used to be multiplexed by the UE other than the first UE.