Communication method and apparatus

1 . A communication method, comprising:

receiving, by a terminal, at least one random access parameter set from a base station;

sending, by the terminal, a random access request to the base station using one random access parameter set of the at least one random access parameter set;

wherein the terminal selects the one random access parameter set based on a random access event;

wherein one or more random access groups correspond to one random access parameter set, one random access group of the one or more random access groups corresponds to a network slice, and the one random access group is selected based on the random access event; and

wherein the one random access parameter set of the at least one random access parameter set comprises a maximum quantity of random access times, and the one random access parameter set of the at least one random access parameter set is selected based on a network slice identifier.

2 . The communication method of claim 1 , wherein

the receiving, by a terminal, at least one random access parameter set from a base station, comprises:

receiving, by the terminal, a plurality of random access parameter sets sent from the base station using a broadcast message.

3 . The communication method of claim 1 , wherein

the receiving, by a terminal, at least one random access parameter set from a base station, comprises:

receiving, by the terminal, a plurality of random access parameter sets sent from the base station using dedicated signaling.

4 . The communication method of claim 1 , wherein the one random access group corresponds to a random backoff time coefficient, the random backoff time coefficient is greater than 0 and less than 1, and a random backoff time corresponding to the one random access group is obtained through calculation in the following manner: using a random backoff indicator included in a media access control-control element (MAC CE) as a reference value, and multiplying a random access time coefficient corresponding to the random access group.

5 . The method according to claim 1 , wherein the one random access parameter set further comprises one or any combination of the following parameters:

indication information of a random access preamble sequence;

indication information of a time-frequency resource occupied by the random access preamble sequence;

a timing time length of a contention resolution timer; and

a scheduling message size threshold.

6 . The communication method of claim 1 , wherein the network slice identifier includes a single management-network slice selection assistance information (S-NSSAI).

7 . A communication apparatus, comprising: at least one processor, wherein the at least one processor is coupled to at least one memory storing programming instructions executable by the at least one processor to perform operations comprising:

receiving at least one random access parameter set from a base station;

sending a random access request to the base station using one random access parameter set of the at least one random access parameter set;

wherein the terminal selects the one random access parameter set based on a random access event;

wherein one or more random access groups correspond to one random access parameter set, one random access group of the one or more random access groups corresponds to a network slice, and the one random access group is selected based on the random access event; and

wherein the one random access parameter set of the at least one random access parameter set comprises a maximum quantity of random access times, and the one random access parameter set of the at least one random access parameter set is selected based on a network slice identifier.

8 . The communication apparatus according to claim 7 , wherein the operations further comprise:

receiving a plurality of random access parameter sets sent from the base station using a broadcast message.

9 . The communication apparatus according to claim 7 , wherein the operations further comprise:

receiving a plurality of random access parameter sets sent from the base station using dedicated signaling.

10 . The communication apparatus according to claim 7 , wherein the one random access group corresponds to a random backoff time coefficient, the random backoff time coefficient is greater than 0 and less than 1, and a random backoff time corresponding to the one random access group is obtained through calculation in the following manner: using the random backoff indicator included in a media access control-control element (MAC CE) as a reference value, and multiplying a random access time coefficient corresponding to the random access group.

11 . The communication apparatus according to claim 7 , wherein the one random access parameter set further comprises one or any combination of the following parameters:

indication information of a random access preamble sequence;

indication information of a time-frequency resource occupied by the random access preamble sequence;

a timing time length of a contention resolution timer; and

a scheduling message size threshold.

12 . The communication apparatus of claim 7 , wherein the network slice identifier includes a single management-network slice selection assistance information (S-NSSAI).

13 . A communication apparatus, comprising: at least one processor, wherein the at least one processor is coupled to at least one memory storing programming instructions executable by the at least one processor to perform operations comprising:

sending at least one random access parameter set to a terminal;

receiving a random access request from the terminal using one random access parameter set of the at least one random access parameter set;

wherein the terminal selects the one random access parameter set based on a random access event;

wherein one or more random access groups correspond to one random access parameter set, one random access group of the one or more random access groups corresponds to a network slice, and the one random access group is selected based on the random access event; and

wherein the one random access parameter set of the at least one random access parameter set comprises a maximum quantity of random access times, and the one random access parameter set of the at least one random access parameter set is selected based on a network slice identifier.

14 . The communication apparatus according to claim 13 , wherein the operations further comprise:

sending a plurality of random access parameter sets to the terminal using a broadcast message.

15 . The communication apparatus according to claim 13 , wherein the operations further comprise:

sending a plurality of random access parameter sets to the terminal using dedicated signaling.

16 . The communication apparatus according to claim 13 , wherein the one random access group corresponds to a random backoff time coefficient, the random backoff time coefficient is greater than 0 and less than 1, and a random backoff time corresponding to the one random access group is obtained through calculation in the following manner: using the random backoff indicator included in a media access control-control element (MAC CE) as a reference value, and multiplying a random access time coefficient corresponding to the random access group.

17 . The communication apparatus according to claim 13 , wherein the one random access parameter set further comprises one or any combination of the following parameters:

indication information of a random access preamble sequence;

indication information of a time-frequency resource occupied by the random access preamble sequence;

a timing time length of a contention resolution timer; and

a scheduling message size threshold.

18 . The communication apparatus of claim 13 , wherein the network slice identifier includes a single management-network slice selection assistance information (S-NSSAI).