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

Claim 0:
1. 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;
determining that a beam failure is detected on a predetermined serving cell of the first number of serving cells, wherein the predetermined serving cell comprises a special cell (SpCell);
initiating a random access procedure;
evaluating a potential size of medium access control (MAC) control elements (CEs) the terminal device is about to transmit along a MsgA or Msg3;
selecting between Random Access Preambles group A and B for contention based random access depending on the evaluating of the potential size of MAC CEs;

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 bitmap that is expected to be included in a beam failure recovery (BFR) MAC CE, and wherein the expected bitmap is a four-octet bitmap to indicate respective results of beam failure detection on up to third-two serving cells;
determining information to at least indicate respective results of the beam failure detection on a second number of serving cells among the first number of serving cells, the second number being smaller than the first number, wherein a part of the expected bitmap corresponding to the first octet is included in the determined information and a remaining part of the expected bitmap is omitted; and
transmitting, the determined information to a network device serving the terminal device using a resource allocated for the terminal device, wherein the determined information is included in a MAC CE, wherein the determined information is transmitted to the network deice in a message of the random access procedure, and wherein one bit in the first octet is used to indicate a result of beam failure detection on the SpCell.