Patent ID: 11916640
Assignee: NOKIA TECHNOLOGIES OY
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 24:
25. A terminal device comprising:
at least one processor; and
at least one memory storing instructions thereon that, when executed by the at least one processor, cause the terminal device to perform at least:
performing beam failure detection on a first number of serving cells configured for the terminal device, wherein the first number of serving cells comprises a special cell (SpCell) and a plurality of secondary cells (SCells);
determining that a beam failure is detected on a predetermined cell of a second number of serving cells, wherein the predetermined cell comprises the SpCell and/or at least one SCell, the second number being smaller than the first number;
determining that an allocated resource is insufficient for transmission of information indicating respective results of the beam failure detection on the first number of serving cells; wherein the respective results of the beam failure detection on the first number of serving cells are expected to be indicated by a four-octet bitmap included in a truncated BFR MAC CE, the four-octet bitmap being operable to indicate respective results of beam failure detection on up to thirty-two serving cells;
determining information to indicate respective results of the beam failure detected on the second number of serving cells, wherein a part of the four-octet bitmap corresponding to a first octet of the four-octet bitmap is included in the determined information and a remaining part of the four-octet bitmap is omitted;
evaluating a potential size of MAC CEs the terminal device is about to transmit along a MsgA or Msg3 of a random access procedure;
selecting between Random Access Preambles group A and group B for contention based random access depending on the potential size of the MAC CEs; and
transmitting, in a MAC CE in a message of the random access procedure, the determined information to a network device serving the terminal device using a random access resource allocated for the terminal device, wherein one bit in the first octet is used to indicate a result of beam failure detection on the SpCell.