Method for updating system message, communication system, and base station

A communication system, comprising:

• more than one base station eNB, wherein each eNB is configured to perform a communication resource negotiation with a neighboring eNB to obtain an available subframe, send a paging message comprising a system message update indication to a user equipment (UE), wherein the system message update indication indicates that the system message is updated, and send a system message update indication message to the UE in the available subframe, wherein the system message update indication message is used to update the system message;
• and
• the UE, configured to receive the paging message comprising the system message update indication, and receive the system message update indication message in the available subframe.

A base station eNB, comprising:

• a negotiating module, configured to perform a communication resource negotiation with a neighboring eNB to obtain an available subframe;
• and
• a sending module, configured to send a paging message comprising a system message update indication to a user equipment (UE), wherein the system message update indication indicates that the system message is updated, and send a system message update indication message to the UE in the available subframe, wherein the system message update indication message is used to update the system message.