Method for requesting system information block, and communication device

1 . A method for requesting a system information block (SIB), performed by a network device, comprising:

receiving an acquisition request for requesting the SIB; and

issuing feedback information for the acquisition request,

wherein receiving the acquisition request for requesting the SIB comprises:

receiving a first message (Msg1) carrying the acquisition request,

wherein issuing the feedback information for the acquisition request comprises:

issuing a second message (Msg2) carrying the feedback information,

wherein the Msg2 has a backoff indicator (BI) subheader of a BI, and the BI subheader carries the feedback information and auxiliary information,

wherein the feedback information is carried by a reserved bit of the BI subheader, and

wherein the auxiliary information is at least configured for a user equipment (UE) to determine relevant information required for acquiring the SIB.

2 . The method according to claim 1 , wherein

issuing the feedback information for the acquisition request, further comprises at least one of:

issuing a negative acknowledgement (NACK), wherein the NACK indicates that a network side does not issue the requested SIB; or

issuing an acknowledgement (ACK), wherein the ACK indicates that the network side issues the requested SIB, and

wherein issuing the NACK comprises at least one of:

issuing the NACK in a case where a resource indicated by configuration information carried in the requested SIB is not configured;

issuing the NACK in a case where the resource indicated by the configuration information carried in the requested SIB is configured, and the resource indicated by the configuration information is unavailable; or

issuing the NACK in a case where scheduling information of the requested SIB is in remaining minimum system information (RMSI).

3 . The method according to claim 1 , wherein the feedback information further comprises the

auxiliary information, and

wherein the auxiliary information comprises at least one of:

duration information, wherein the duration information indicates an interval duration for the UE to initiate the acquisition request again,

availability state information, wherein the availability state information indicates whether configuration information carried in the SIB requested by the acquisition request exists, or

availability state information, wherein the availability state information indicates whether a resource indicated by the configuration information carried in the SIB requested by the acquisition request is available.

4 . The method according to claim 1 , wherein

the feedback information is carried in a media access control (MAC) random access response (RAR) of the Msg2,

the MAC RAR carrying the feedback information is a second type of MAC RAR, and the MAC RAR not carrying the feedback information is a first type of MAC RAR,

the Msg2 that cannot carry the feedback information is a first type of Msg2, and

the Msg2 that can carry the feedback information is a second type of Msg2.

5 . The method according to claim 4 , wherein a communication resource of the Msg1 corresponding to the first type of Msg2 is different from a communication resource of the Msg1 corresponding to the second type of Msg2; and

the method further comprises:

issuing a SIB1, wherein the SIB1 carries resource information of the communication resource of the Msg1 corresponding to the second type of Msg2.

6 . The method according to claim 1 , wherein issuing the feedback information for the acquisition request comprises:

issuing the Msg2 carrying a random access preamble (RAP) identifier (ID) corresponding to the feedback information, and

wherein the Msg2 carrying the RAP ID corresponding to the feedback information is a second type of Msg2, and the Msg2 not carrying the RAP ID corresponding to the feedback information is a first type of Msg2.

7 . The method according to claim 1 , wherein

receiving the acquisition request for requesting the SIB comprises:

receiving a third message (Msg3) carrying the acquisition request for the SIB, and

issuing the feedback information for the acquisition request comprises:

issuing a fourth message (Msg4) carrying the feedback information.

8 . The method according to claim 7 , wherein

the Msg4 comprises a medium access control control element (MAC CE),

the MAC CE comprises a MAC CE subheader, and

at least part of a plurality of logical channel identifier (LCID) values carried in the MAC CE subheader have a corresponding relationship with the feedback information.

9 . The method according to claim 7 , wherein

the Msg4 comprises a medium access control control element (MAC CE),

the MAC CE comprises a payload,

a first part successively distributed in the payload does not have a corresponding relationship with the feedback information, and

a second part, other than the first part, in the payload has a corresponding relationship with the feedback information.

10 . The method according to claim 7 , wherein

the Msg4 comprises:

a first type of MAC CE, wherein the first type of MAC CE is configured for resolving a contention collision between UEs, and

a second type of MAC CE, wherein the second type of MAC CE carries the feedback information, and

the first type of MAC CE and the second type of MAC CE are adjacently distributed in the Msg4.

11 . The method according to claim 1 , wherein issuing the feedback information for the acquisition request comprises:

issuing a radio resource control (RRC) message carrying the feedback information.

12 . A communication device, comprising:

a processor;

a transceiver; and

a memory storing an executable program that is capable of being executed by the processor, and

wherein the executable program, when executed by the processor, causes the processor to perform the method according to claim 1 .

13 . A method for requesting a system information block (SIB), performed by a user equipment (UE), comprising:

sending an acquisition request for requesting the SIB; and

receiving feedback information for the acquisition request,

wherein sending the acquisition request for requesting the SIB comprises:

sending a first message (Msg1) carrying the acquisition request,

wherein receiving the feedback information for the acquisition request comprises:

receiving a second message (Msg2) carrying the feedback information,

wherein the Msg2 has a backoff indicator (BI) subheader of a BI, and the BI subheader carries the feedback information and auxiliary information,

wherein the feedback information is carried by a reserved bit of the BI subheader, and

wherein the auxiliary information is at least configured for the UE to determine relevant information required for acquiring the SIB.

14 . The method according to claim 13 , wherein receiving the feedback information for the acquisition request, further comprises at least one of:

receiving a negative acknowledgement (NACK), wherein the NACK indicates that a network side does not issue the requested SIB, or

receiving an acknowledgement (ACK), wherein the ACK indicates that the network side issues the requested SIB.

15 . The method according to claim 14 , further comprising:

acquiring, in response to receiving the NACK not carrying duration information, duration information for initiating the acquisition request again, wherein the duration information indicates an interval duration for the UE to initiate the acquisition request again.

16 . The method according to claim 13 , wherein the feedback information further comprises the

auxiliary information, and,

wherein the auxiliary information comprises at least one of:

duration information, wherein the duration information indicates an interval duration for the UE to initiate the acquisition request again,

availability state information, wherein the availability state information indicates whether configuration information carried in the SIB requested by the acquisition request exists, or

availability state information, wherein the availability state information indicates whether a resource indicated by the configuration information carried in the SIB requested by the acquisition request is available.

17 . The method according to claim 13 , wherein

the feedback information is carried in a media access control (MAC) random access response (RAR) of the Msg2,

the MAC RAR carrying the feedback information is a second type of MAC RAR, and the MAC RAR not carrying the feedback information is a first type of MAC RAR,

the Msg2 that cannot carry the feedback information is a first type of Msg2, and the Msg2 that can carry the feedback information is a second type of Msg2, and

a communication resource of the Msg1 corresponding to the first type of Msg2 is different from a communication resource of the Msg1 corresponding to the second type of Msg2.

18 . The method according to claim 17 , further comprising:

receiving a SIB1, wherein the SIB1 carries resource information of the communication resource of the Msg1 corresponding to the second type of Msg2.

19 . The method according to claim 13 , wherein receiving the feedback information for the acquisition request comprises:

receiving the Msg2 carrying a random access preamble (RAP) identifier (ID) corresponding to the feedback information.

20 . The method according to claim 13 , wherein

sending the acquisition request for requesting the SIB comprises:

sending a third message (Msg3) carrying the acquisition request for the SIB, and

receiving the feedback information for the acquisition request comprises:

receiving a fourth message (Msg4) carrying the feedback information.

21 . The method according to claim 20 , wherein

the Msg4 comprises a medium access control control element (MAC CE),

the MAC CE comprises a MAC CE subheader, and

at least part of a plurality of logical channel identifier (LCID) values carried in the MAC CE subheader have a corresponding relationship with the feedback information.

22 . The method according to claim 20 , wherein

the Msg4 comprises a medium access control control element (MAC CE),

the MAC CE comprises a payload,

a first part successively distributed in the payload does not have a corresponding relationship with the feedback information, and

a second part, other than the first part, in the payload has a corresponding relationship with the feedback information.

23 . The method according to claim 20 , wherein the Msg4 comprises:

a first type of MAC CE, wherein the first type of MAC CE is configured for resolving a contention collision between UEs; and

a second type of MAC CE, wherein the second type of MAC CE carries the feedback information, and

wherein the first type of MAC CE and the second type of MAC CE are adjacently distributed in the Msg4.

24 . The method according to claim 13 , wherein receiving the feedback information for the acquisition request comprises:

receiving a radio resource control (RRC) message carrying the feedback information.

25 . A communication device, comprising:

a processor;

a transceiver; and

a memory storing an executable program that is capable of being executed by the processor, and

wherein the executable program, when executed by the processor, causes the processor to perform the method according to claim 13 .