Patent ID: 11937308
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A method implemented by a contending radio node for attempting contention-based random access over one or more radio resources, the method comprising:
obtaining a random access preamble based on which a timing advance for transmission from the contending radio node to a recipient radio node is derivable, wherein the random access preamble is susceptible to contention;
obtaining a contention-resolving identity of the contending radio node;
transmitting the random access preamble and the contention-resolving identity to the recipient radio node, on the one or more radio resources, and using the same Orthogonal Frequency Division Multiplexing (OFDM) transmission advancement timing;
responsive to said transmitting, receiving from the recipient radio node a response signal that indicates a contention-resolving identity as well as a timing advance;
resolving the contention in favor of the contending radio node when the contention-resolving identity indicated by the response signal corresponds to the contention-resolving identity that the contending radio node transmitted; and
responsive to resolving the contention in favor of the contending radio node, adjusting the OFDM transmission advancement timing that governs the timing advancement of OFDM transmissions from the contending radio node to the recipient radio node, according to the timing advance indicated by the response signal.