COMMUNICATION METHOD AND APPARATUS
FIG5 shows an example of a schematic structural diagram of a media access control-control element (Media Access Control-Control Element, MAC CE for short) according to an embodiment of this application
In an embodiment, a new MAC CE format in an Msg2 is defined to carry a plurality of random backoff indicators corresponding to a plurality of random access groups. FIG5 shows an example of a MAC CE that carries random backoff indicators corresponding to five random access groups. BI-0 to BI-4 in the MAC CE are random backoff indicators respectively corresponding to a random access group 0 to a random access group 4. Optionally, quantities of bits occupied by the random backoff indicators are the same. A correspondence between a random backoff indicator included in the MAC CE and a random access group may be stipulated, for example, five random access groups are used as an example. In this case, the random backoff indicators included in the MAC CE sequentially correspond to the five random access groups in a stipulated order. A correspondence is shown in FIG5. For another example, the base station may add a plurality of random backoff indicators corresponding to a plurality of logical channels or logical channel groups to the Msg2, and return the Msg2 to the terminal. One or more logical channels or logical channel groups correspond to one random backoff indicator. A MAC CE format in the Msg2 may be shown in FIG5. In another embodiment, the MAC CE in the Msg2 carries one random backoff indicator. A random backoff indicator (random backoff time) corresponding to each random access logical channel or logical channel group may be obtained through calculation in the following manner: using the random backoff indicator included in the MAC CE as a reference value, and multiplying a random access time coefficient corresponding to the random access logical channel or logical channel group, to obtain the random backoff time corresponding to the random access logical channel or logical channel group. A value range of the random access time coefficient may be set to (0, 1), in other words, the random access time coefficient is greater than 0 and less than 1.
schematic
5
Table
2
random access group logical channel
701
sending module
702
receiving module
3
Table solution
['2. The method according to claim 1, wherein the random access parameter set further comprises a random access preamble sequence, and the random access request comprises the random access preamble sequence; and after the receiving, by the base station, a random access request of the terminal in a connected mode or an inactive mode, the method further comprises: returning, by the base station, a random access response to the terminal, wherein the random access response comprises indication information of an uplink resource allocated to the terminal, the uplink resource is allocated by the base station based on a scheduling message size threshold value corresponding to a random access group, and the random access group is a random access group corresponding to the random access preamble sequence sent by the terminal.', '11. Abase station, comprising: a sending module, configured to send, by using dedicated signaling, at least one random access parameter set to a terminal in a connected mode or an inactive mode;  and a receiving module, configured to receive a random access request of the terminal in a connected mode or an inactive mode, wherein one of the at least one random access parameter set is used in the random access request, and the random access parameter set comprises monitoring start time and/or a time window size of a random access response time window.']