Information indication method and apparatus, information detection method and apparatus and communication system

1. A network device, comprising:

a processor circuit configured to generate indication information indicating a position of a synchronization signal (SS)/physical broadcast channel (PBCH) block in a signal transmission period; and

a transmitter configured to transmit the indication information to a user equipment (UE),

wherein the indication information is an index of the SS/PBCH block and the indication information comprises two parts of information, a first part of the indication information is the least significant bits (LSB) of the index of the SS/PBCH block that are indicated by a demodulation reference signal (DMRS) sequence, and a second part of the indication information is the most significant bits (MSB) of the index of the SS/PBCH block that are indicated by a PBCH payload.

2. The network device according to claim 1 , wherein the transmitter simultaneously transmits the two parts of indication information to the UE.

3. The network device according to claim 1 , wherein each of the two parts of information is indicated by at least one of:

a signal sequence, information on a demodulation reference signal (DMRS) sequence, and information on the PBCH.

4. The network device according to claim 3 , wherein the signal sequence comprises one of: a secondary synchronization signal sequence, a demodulation reference signal (DMRS) sequence, and a tertiary synchronization signal (TSS) sequence;

the information on a DMRS sequence comprises one of: a frequency domain offset, a time domain offset of a time-frequency resource occupied by the DMRS sequence, and an orthogonal cover code of the DMRS sequence; and

the information on the PBCH comprises one of: a PBCH payload, a scrambling sequence of a PBCH, or a cyclic shift adopted by bit information contained in a PBCH, and a cyclic redundancy check (CRC) mask of CRC carried by a scrambled PBCH.

5. The network device according to claim 3 , wherein the

processor circuit is further configured to configure a mapping relationship between the information on the DMRS and a part of position information for determining the position of the SS/PBCH block.

6. The network device according to claim 1 , wherein the transmitter is configured to transmit a demodulation reference signal (DMRS), at least a part of the DMRS placed in a symbol where the SS is located in the SS/PBCH block.

7. A User Equipment (UE), comprising:

a receiver configured to receive indication information indicating a position of a synchronization signal (SS)/physical broadcast channel (PBCH) block in a signal transmission period,

wherein the indication information is an index of the SS/PBCH block and the indication information comprising two parts of information, a first part of the indication information is the least significant bits (LSB) of the index of the SS/PBCH block that are indicated by a demodulation reference signal (DMRS) sequence, and a second part of the indication information is the most significant bits (MSB) of the index of the SS/PBCH block that are indicated by a PBCH payload, and

a processor circuit configured to determine the position of the SS/PBCH block according to the indication information,

wherein the receiver further configured to receive the PBCH of the SS/PBCH block according to the least significant bits of the index of the SS/PBCH block indicated by the DMRS and to demodulate the PBCH of the SS/PBCH block by using the DMRS.

8. The UE according to claim 7 , wherein each of the two parts of information is indicated by at least one of:

a signal sequence, information on a demodulation reference signal (DMRS) sequence, and information on the PBCH.

9. The UE according to claim 7 , wherein the receiver is further configured to receive

mapping relationship information from a network side, the mapping relationship information indicating a relationship between information on a demodulation reference signal (DMRS) and a part of the position information for determining the position of the SS/PBCH block.

10. The UE according to claim 7 , wherein the receiver is further configured to receive information indicating to acknowledge a detected position or a part of the position of the SS/PBCH block in the signal transmission period transmitted by a network side, wherein,

the processor circuit is further configured

to acknowledge the detected position or part of the position of the SS/PBCH block in the signal transmission period according to the received information to acknowledge.

11. The network device according to claim 1 , wherein the processor circuit is further configured to generate a DMRS sequence based on the LSB of the index of the SS/PBCH block and a cell ID to which the SS/PBCH block corresponds.

12. The UE according to claim 7 , wherein the receiver is configured to simultaneously receive the two parts of information transmitted by a network device.

13. The UE according to claim 7 , wherein the processor is further configured to generate the DMRS sequence based on the LSB of the index of the SS/PBCH block and a cell ID to which the SS/PBCH block corresponds.

14. The network device according to claim 1 , wherein the SS/PBCH block comprises a PSS, an SSS, a PBCH and a DMRS, the DMRS is used for demodulation of the PBCH in the SS/PBCH block.

15. A communication network, comprising:

a network device configured to:

generate indication information indicating a position of a synchronization signal (SS)/physical broadcast channel (PBCH) block in a signal transmission period, and

transmit the indication information, wherein the indication information is an index of the SS/PBCH block and the indication information comprising two parts of information, a first part of the indication information is the least significant bits (LSB) of the index of the SS/PBCH block that are indicated by a demodulation reference signal (DMRS) sequence, and a second part of the indication information is the most significant bits (MSB) of the index of the SS/PBCH block that are indicated by a PBCH payload; and

a user equipment configured to receive the indication information.