| 摘要 |
First, second and third apparatuses, methods and computer programs are provided. The first apparatus (10) controls a transmitter to transmit, to the third apparatus (30), service information relating to at least one service. The first apparatus (10) also controls the transmitter to transmit, to the third apparatus (30), at least one access control parameter that defines how to control access to the service information. The second apparatus (20) controls a transmitter to transmit a request, to the third apparatus (30) via data link layer signaling, requesting access to service information. The request comprises at least one access request parameter. The third apparatus (30) determines, from at least one access control parameter provided by the first apparatus (10), how to control access to service information provided by the first apparatus (10). The third apparatus (30) decides, in response to reception of the request from the second apparatus (20), whether to enable the second apparatus (20) to access service information provided by the first apparatus (10). The decision is dependent upon the at least one access control parameter. In response to deciding to enable the second apparatus (20) to access service information provided by the first apparatus (10), the third apparatus (30) controls a transmitter to transmit, via data link layer signaling, that service information to the second apparatus (20). |
