Method for transmitting information in communication system, base station and user equipment

• US 10,554,468 B2
• Filed: 06/26/2017
• Issued: 02/04/2020
• Est. Priority Date: 09/30/2016
• Status: Active Grant

• Current Assignee: Spreadtrum Communications (Shanghai) Co., Ltd., Spreadtrum Communications USA
• Original Assignee: Spreadtrum Communications USA
• Inventors: Zhou, Huayu, Xu, Weijie, Xu, Zhikun
• Primary Examiner(s): Crompton, Christopher R
• Application Number:
  US15/632,750
• Publication Number:
  US 20180097678A1
• Time in Patent Office: 953 Days
• Field of Search: 370329
• CPC Class Codes: H04L 1/0013 Rate matching, e.g. puncturing or repetition of code symbols
• CPC Class Codes: H04L 27/2666 Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length
• CPC Class Codes: H04L 27/2678 using cyclostationarities, e.g. cyclic prefix or postfix
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method for transmitting information in a communication system, a base station and a user equipment. The method includes mapping a synchronous signal and a broadcast channel to be transmitted to preset one or more time-frequency resource blocks in a target carrier, where a numerology used by the target carrier is a first numerology group, and the first numerology group includes any one or more numerologies that are allowed to be used by the target carrier; the one or more time-frequency resource blocks are located within an initial access subband of the target carrier and uses a second numerology, where the second numerology is a fixed numerology; the broadcast channel carries at least configuration information of the initial access subband; and the initial access subband is a subband corresponding to a numerology in the first numerology group; and transmitting the one or more time-frequency resource blocks to a user equipment.

Claims

1. A method for transmitting information in a communication system, comprising:

mapping a synchronous signal and a broadcast channel to be transmitted to preset one or more time-frequency resource blocks in a target carrier, where a numerology used by the target carrier is a first numerology group, and the first numerology group comprises any one or more first numerologies that are allowed to be used by the target carrier;

the one or more time-frequency resource blocks are located within an initial access subband of the target carrier and use a second numerology, where the second numerology is a fixed numerology;

the broadcast channel carries at least configuration information of the initial access subband; and

the initial access subband is a subband corresponding to a first numerology in the first numerology group;

transmitting the one or more time-frequency resource blocks to a user equipment; and

indicating, by the initial access subband, configuration information of one or more other subbands of the target carrier, wherein the other subbands comprise subbands of the target carrier other than the initial access subband;

wherein indicating the configuration information of the one or more other subbands of the target carrier by the initial access subband comprises;

carrying, by a downlink control channel in the initial access subband, scheduling information for scheduling the user equipment to receive configuration information of the one or more other subbands on a physical shared channel;

wherein the configuration information of the initial access subband comprises a bandwidth and a numerology of the initial access subband; and

wherein the configuration information of the other subbands comprises bandwidths and numerologies of the other subbands.

2. The method according to claim 1, wherein the second numerology comprises a fixed subcarrier spacing and a fixed cyclic prefix length.

3. The method according to claim 2, wherein the fixed cyclic prefix length is any one of a normal cyclic prefix length and an extended cyclic prefix length.

4. The method according to claim 1, wherein a time-frequency resource block has a slot duration of ½

{circumflex over ( 

)}m or 2 {circumflex over ( 

)}m milliseconds, and m is a positive integer.

5. The method according to claim 1, wherein a time-frequency resource block occupies one or more slots of the initial access subband.

6. The method according to claim 5, further comprising:

when resource of a downlink control channel is overlapped with resource of the time-frequency resource block, adjusting the resource of the downlink control channel by rate matching to avoid the resource of the downlink control channel being overlapped with the resource of the time-frequency resource block.

7. The method according to claim 1, wherein the bandwidth of the initial access subband is the same as a bandwidth of a reference signal used by the user equipment for performing a radio resource management measurement on the initial access subband.

8. The method according to claim 1, wherein the bandwidth of the initial access subband is the same as a bandwidth of a downlink control channel in the initial access subband.

9. The method according to claim 8, wherein a reference signal for decoding the downlink control channel in the initial access subband and a reference signal for decoding a broadcast channel in the initial access subband are of a quasi-co-location.

10. The method according to claim 1, wherein a subcarrier spacing in the numerology of the initial access subband occupies 2 bits.

11. The method according to claim 1, wherein a cyclic prefix length in the numerology of the initial access subband occupies 1 bit.

12. The method according to claim 1, wherein the cyclic prefix length in the numerology of the initial access subband is the same as a cyclic prefix length of a time-frequency resource block.

13. The method according to claim 1, wherein the configuration information of the initial access subband further comprises:

an offset of a center frequency point of a time-frequency resource block with respect to a center frequency point of the initial access subband.

14. The method according to claim 1,

wherein the one or more time-frequency resource blocks further comprise a common control channel, indicating the configuration information of the one or more other subbands of the target carrier by the initial access subband further comprises:

carrying, by the common control channel, at least the configuration information of the other subbands.

15. The method according to claim 1, wherein the bandwidths of the other subbands are the same as a bandwidth of a reference signal used by the user equipment for performing radio resource management measurements on the other subbands.

16. The method according to claim 1, wherein the bandwidths of the other subbands are the same as bandwidths of downlink control channels in the other subbands.

17. The method according to claim 1, wherein subcarrier spacings in the numerologies of the other subbands occupy 2 bits.

18. The method according to claim 1, wherein cyclic prefix lengths in the numerologies of the other subbands occupy 1 bit.

19. The method according to claim 1, wherein the configuration information of the other subbands further comprises:

an offset of a center frequency point of a time-frequency resource block with respect to a center frequency point of each of the other subbands.

20. The method according to claim 1, wherein transmitting the one or more time-frequency resource blocks to the user equipment comprises:

transmitting the one or more time-frequency resource blocks to the user equipment with a fixed time period.

21. A method for transmitting information in a communication system, comprising:

receiving one or more time-frequency resource blocks transmitted by a base station, where the one or more time-frequency resource blocks are located within an initial access subband and uses a second numerology, and the second numerology is a fixed numerology;

the initial access subband is a subband corresponding to a firstnumerology in a first numerology group used by a target carrier, where the first numerology group comprises any one or more first numerologies that are allowed to be used by the target carrier; and

a time-frequency resource block comprises a synchronization signal and a broadcast channel, where the broadcast channel carries at least configuration information of the initial access subband;

detecting the one or more time-frequency resource blocks, obtaining the synchronization signal and performing a time-frequency synchronization;

determining a location of the broadcast channel in the one or more time-frequency resource blocks and decoding the broadcast channel after a synchronization with the initial access subband; and

detecting a corresponding downlink control channel based on decoded information;

wherein the method further comprises;

after the synchronization with the initial access subband, obtaining configuration information of one or more other subbands of the target carrier from the initial access subband, and accessing the one or more other subbands according to the configuration information of the one or more other subbands so as to transmit and receive data on the one or more other subbands;

wherein obtaining the configuration information of the one or more other subbands of the target carrier from the initial access subband comprises;

obtaining scheduling information from a downlink control channel in the initial access subband, and receiving configuration information of the one or more other subbands of the target carrier on a physical shared channel indicated by the scheduling information;

wherein the configuration information of the initial access subband comprises a bandwidth and a numerology of the initial access subband;

wherein the configuration information of the other subbands comprises bandwidths and numerologies of the other subbands.

22. The method according to claim 21, wherein obtaining the configuration information of the one or more other subbands of the target carrier from the initial access subband further comprises:

obtaining the configuration information of the one or more other subbands by decoding a common control channel of the one or more time-frequency resource blocks.