Abstract: A signal transmission and reception method and apparatus and a communication system, the signal transmission and reception apparatus being applicable in an IAB-DU and includes a first receiver configured to receive uplink data transmitted to a parent node of an integrated access and backhaul (IAB) node via an uplink; and a first transmitter configured to transmit flow control feedback information to a child node of the integrated access and backhaul node, the flow control feedback information being used to indicate a load status of uplink transmission of the integrated access and backhaul node.

Abstract: An information transmitting apparatus, configured in a terminal equipment, includes: processor circuitry configured to trigger a delay information reporting at a media access control layer of the terminal equipment; and a transmitter configured to transmit the delay information reporting to a network device via a media access control control element, wherein that the processor circuitry triggers the delay information report at the media access control layer of the terminal equipment comprises: the media access control layer of the terminal equipment determines whether to trigger the delay information report according to a value of at least one discard timer.

Abstract: An indicating apparatus, configured to indicate unused transmission occasions, configured in a terminal equipment, includes: determining processor circuitry configured to determine an unused transmission occasion at a media access control layer of the terminal equipment; and indicating processor circuitry configured to indicate relevant information on the unused transmission occasion to a physical layer of the terminal equipment via the media access control layer of the terminal equipment; wherein the determining processor circuitry determines whether a transmission occasion in a predetermined number of valid transmission occasions is an unused transmission occasion.

Abstract: A method and an apparatus for detecting beam failure. The method comprises: receiving a beam failure instance indication by a medium access control (MAC) entity of a terminal equipment, incrementing a transmission reception point (TRP)-specific beam failure indication count by 1, and in a case where the TRP-specific beam failure indication count is greater than or equal to a TRP-specific beam failure instance maximum count, determining that a beam failure occurs in a transmission reception point or beam failure recovery (BFR) of the transmission reception point is triggered or a beam failure indication of the transmission reception point is triggered.

Abstract: A path processing apparatus, applicable to a remote terminal equipment configured with an indirect path, includes: a first receiver configured to receive first indication information transmitted by a network device, the first indication information comprising an indication for adding or changing a direct path in addition to the indirect path; and first processor circuitry configured to initiate RRC reestablishment when a direct path is added or changed according to the first indication information and the adding or changing a direct path fails.

Abstract: An apparatus, configured in a terminal equipment, includes: processor circuitry configured to: maintain uplink time alignment of a serving cell based on one or two timing advance (TA) timers, one TA timer in the one or two TA timers being associated with a timing advance group (TAG), and the serving cell being associated with two TA timers; and start or restart a TA timer in the two TA timers when the signal is received, the TA timer corresponding to a TAG which corresponds to the TAG ID of the one or more TAGS; and a receiver configured to receive a signal including a timing advance command (TAC) of the serving cell and TAG ID of one or more TAGS, the signal being a random access response (RAR) message or a message B (MSGB).

Abstract: A multi-path communication apparatus, configured in a remote terminal equipment, includes: a receiver configured to receive a radio resource control reconfiguration message for adding or changing an indirect path transmitted by a network device via a direct path; and a transmitter configured to transmit a radio resource control reconfiguration complete message to the network device via the direct path, wherein, a first timer is started when the remote terminal equipment receives the radio resource control reconfiguration message for adding or changing an indirect path; and, the first timer is stopped under a first condition, the first condition includes: the remote terminal equipment receives indication information transmitted by the relay terminal equipment.

Abstract: A multi-path communication apparatus, configured in a remote terminal equipment, includes: a receiver configured to receive first indication information transmitted by a relay terminal equipment and second indication information transmitted by a network device; and processor circuitry configured to transmit a first PC5-RRC (radio resource control) message to the relay terminal equipment according to the second indication information, the first PC5-RRC message being used to bring the relay terminal equipment into a radio resource control connected state.

Abstract: An apparatus for controlling migration of a distributed unit, applicable to an integrated access and backhaul node (IAB-node), includes: first processor circuitry controlling the node to execute the following: migrating an F1 terminating donor of the node from a first donor central unit (donor-CU) to a third donor-CU, wherein a radio resource control (RRC) terminating donor of the node is a second donor-CU, the second donor-CU being identical to the first donor-CU, or the second donor-CU being identical to the third donor-CU, or the second donor-CU being different from both the first donor-CU and the third donor-CU, and the node has two logical IAB-DUs, wherein the first IAB-DU has F1 connection with a first donor-CU and a second IAB-DU has F1 connection with the third donor-CU.

Abstract: An apparatus for transmitting and receiving signals, applicable to a mobile integrated access and backhaul (IAB) node, includes: first processor circuitry controlling the IAB node so that the IAB node executes the following: configuring a first logical mobile IAB distributed unit (IAB-DU) and a second logical mobile IAB distributed unit (LAB-DU) in the node respectively with uplink backhaul mapping configuration by different IAB-donor central units; and transmitting signals by a mobile termination of the node (IAB-MT) according to the uplink backhaul mapping configuration.

Abstract: An apparatus for receiving and transmitting data, configured in a relay terminal equipment, includes: a receiver configured to receive a first data packet transmitted by a source terminal equipment to a destination terminal equipment, the first data packet comprising data transmitted by the source terminal equipment to the destination terminal equipment; processor circuitry configured to determine a first egress RLC (Radio Link Control) channel according to mapping relationship of radio bearers (RBs) and egress RLC channels for a pair of the source terminal equipment and the destination terminal equipment configured by a first configuration information, wherein the first configuration information comprising an identifier of the source terminal equipment, an identifier of the destination terminal equipment, and mapping relationship information of radio bearers (RBs) and egress RLC channels corresponding to the pair of the source terminal equipment and the destination terminal equipment; and a transmitter.

Abstract: An information transceiving apparatus, applicable to a first IAB-donor-node, includes a transmitter configured to transmit a first message to a second IAB-donor-node, the first message comprising a BAP address of a first node in topology of the first IAB-donor-node, and a receiver configured to receive a second message transmitted by the second IAB donor node, the second message comprising a BAP Routing ID in topology of the second IAB donor node, and a processor configured to configure BAP routing entries for nodes in its topology according to the second message.

Abstract: A resource allocation apparatus includes processor circuitry configured to acquire UE bearer information, and processor circuitry configured to allocate a resource for an MAC SDU of a UE bearer k in a logical channel j, allocation of the resource being related to the number of tokens of UE bearer in the logical channel j.

Abstract: A random access apparatus configured in a terminal equipment, includes: a memory; and processor circuitry coupled to the memory and configured to: when the terminal equipment evaluates a serving cell and determines that the serving cell satisfies a first condition or when the terminal equipment receives an MAC (media access control) CE (control element) indicating a candidate cell, initiate a random access procedure on the candidate cell.

Abstract: A data processing apparatus, configured in a terminal equipment, includes: setting processor circuitry configured to set a discard timer duration for a protocol data unit (PDU) Set; and processor circuitry configured to discard a PDU Set corresponding to an expired discard timer at a packet data convergence protocol (PDCP) layer when a discard timer expires.

Abstract: An information processing apparatus, configured in a terminal equipment, includes: processor circuitry configured to trigger delay information report; and a transmitter configured to transmit the delay information to a network device, the delay information comprising a first remaining time and a first time point associated with the first remaining time, and/or, the delay information comprising a second remaining time, the second remaining time being a second deadline and/or a time associated with a second time point.

Abstract: A multi-path processing apparatus, configured in a remote terminal equipment, includes: a receiver configured to receive indication information transmitted by a network device; and a transmitter configured to transmit data by using a direct path or an indirect path in the multi-path according to the indication information, wherein the indication information comprises a first threshold related to a data amount of a PDCP (packet data convergence protocol) layer.

Abstract: A random access apparatus, applicable to a terminal equipment, includes: a transmitter configured to transmit a random access preamble on a L1/L2 triggered mobility (LTM) candidate cell on a determined physical random access channel (PRACH) occasion corresponding to a selected synchronization signal block (SSB); and processor circuitry configured to, when a terminal equipment transmits the random access preamble on the LTM candidate cell, and/or when the terminal equipment receives a physical downlink control channel (PDCCH) transmission in a search space or a control resource set (coreset) related to the LTM candidate cell, determine that a random access procedure on the LTM candidate cell is completed.

Abstract: A data processing apparatus, configured in a transmitting device, the transmitting device being a terminal equipment or a network device, includes: a receiving device; and a transmitter configured to, after the transmitting device discards PDCP SDUs, transmit sequence number information of discarded PDCP SDUs to the receiving device.

Abstract: An uplink data transmission apparatus, configured in a terminal equipment, includes: processor circuitry configured to determine hybrid automatic repeat request (HARQ) process identifier(s) associated with one configured grant (CG) occasion in at least two configured grant occasions (CG occasions) in a periodicity of a configured grant (CG) configuration, at least according to a first parameter and a second parameter; wherein the first parameter is an integer starting from 0, and the second parameter is the number of configured grant occasions (CG occasions) in the periodicity of the configured grant (CG) configuration; and a transmitter configured to transmit uplink data on the one configured grant occasion (CG occasion) according to determined hybrid automatic repeat request (HARQ) process identifier(s) associated with the one configured grant occasion (CG occasion).