A method for a User Equipment (UE) operating in a wireless communication system, the method includes receiving an Radio Resource Control (RRC) message for reconfiguring a new value of a Packet Data Convergence Protocol (PDCP) reordering timer, while the PDCP reordering timer is running; and setting a value of reordering_PDCP_RX_COUNT to a COUNT value associated to RX_HFN and Next_PDCP_RX_SN when the RRC message is received.

An apparatus for mass spectrometry comprises a portion generator (10) for creating localized analyte portions in synchronization with trigger pulses, a transfer system (20) coupled to the portion generator (10) for transporting the localized analyte portions, a plasma ionizer unit (30) coupled to the transfer system (20) for atomizing, vaporizing and ionizing received analyte portions with plasma, a mass analyzer (41) coupled to the plasma ionizer unit (30) for analyzing received analyte portions, the mass analyzer (41) comprising at least one detector, and a data acquisition electronics (50) connected to the at least one detector for acquiring signals (43) generated by the at least one detector. The apparatus further includes a signal delay device (60) for receiving the trigger pulses (11) and delivering delayed signals (61) corresponding to the trigger pulses to account for a delay experienced by the particles to be analyzed between portion generation and detection.

Indication of delivery-path information may benefit various communication systems. For example, wireless communication systems may benefit from per-protocol data unit delivery-path indication to data recipient or from setting a timer expiry value dependent on such received information. A method can comprise sending, by a data-sending protocol entity, a control protocol data unit. The control protocol data unit can identify protocol data units destined to a data-receiving protocol entity. The method can also comprise providing in the control protocol data unit, for each of the identified protocol data units, a direct or indirect indication of at least one delay figure of a delivery path chosen for an initial transmission of the identified protocol data unit.

A device may support communication without a radio link control (RLC) layer, which may include receiving a packet data convergence protocol (PDCP) service data units (SDUs) for multiple radio bearers at a PDCP layer. The multiple radio bearers may have different reliability or delay targets, and a reordering procedure at the PDCP layer may be conducted on the different radio bearers. The reordering procedure may be a same reordering procedure for each of the radio bearers, with one or more parameters that may be adjusted based on one or both of the reliability target or delay target of the radio bearer.

In the present invention, the transmitting device attaches a sequence number (SN) for each of service data unit (SDU) elements to generate a protocol data unit (PDU) containing the SDU elements. Each of the SDU elements is a SDU or SDU segment. The PDU includes the SDU elements and respective SNs for the SDU elements. The PDU includes an indicator for each of the SDU elements, and the indicator indicating whether a corresponding SDU element is a SDU or SDU segment.

The disclosure relates to a pre-5.sup.th-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4.sup.th-generation (4G) communication system such as long term evolution (LTE). A method of operating a user equipment (UE) and an apparatus therefor are provided. The method includes detecting an occurrence of a first state related to a state of a buffer for a packet data convergence protocol (PDCP) entity, transmitting a request message indicating the occurrence of the first state to a base station (BS), and receiving one or more packets from the BS based on transmission control performed based on the request message.

A data packet has a header and a radio link control (RLC) protocol data unit (PDU). The RLC PDU transports at least one full RLC service data unit (SDU), one or two RLC SDU fragments, or at least one full RLC SDU and at least one RLC SDU fragment. An RLC SDU fragment is only located (i) at the beginning or end of the RLC PDU or at the end of the radio link control protocol data or (ii) at the beginning and end of the RLC PDU. A single field in the header consists of a first bit and a second bit, even when a number of full RLC SDUs and RLC SDU fragments in the RLC PDU is more than two. The single field indicates whether (i) the RLC PDU begins with a fragment of a RLC SDU and (ii) the RLC PDU ends with a RLC SDU fragment. The data packet is formed including the configured header and the configured RLC PDU and transmitted.

Aspects of the disclosure provide techniques for automatic repeat request (ARQ) in a free-space optical communication (FSOC) architecture. These techniques, including block-selective ARQ, adaptive retransmission delay, and random seed scrambling, can be used individually or in combination to combat problems involving frame loss or corruption. These techniques enable the system to rapidly recover by streamlining the retransmission process. For instance, block-selective ARQ acknowledges variable length blocks of frames in the return stream from the receiver to the transmitter. Adaptive retransmission delay allows the retransmission delay to grow in the absence of feedback by the receiver, up to some defined limit. And with random seed sampling, a scrambling sequence is incorporated to aid with frame syncing, which avoids the need for a line code. These aspects of the technology provide a robust communication process, and also reduce overhead costs associated with unnecessary retransmissions.

A system and method for information delivery with multiple point transmission are provided. A method for detecting lost packets is provided. The method includes initiating a timer for a received packet at a receiving transmission point, where the timer is set according to a time value associated with the received packet. The method also includes determining that a delivery of the received packet has failed according to the timer elapsing, and transmitting a lost packet report to a primary transmission point that distributed the received packet to the receiving transmission point.

The present application provides a method and a device for receiving and processing data of a radio link control (RLC) layer, where the method includes: receiving a RLC protocol data unit (PDU); when a data field of the target RLC PDU merely comprises a segment of a complete RLC service data unit (SDU), processing the target RLC PDU or discarding the

RLC PDU according to a current operating state of a re-assembly timer corresponding to a value of a sequence number (SN) comprised in the target RLC PDU, where the target RLC PDU is one of a plurality of RLC PDUs, the plurality of RLC PDUs has SNs of a same value, and the plurality of RLC PDUs is capable of being re-assembled into the complete RLC SDU, and the current operating state is one of the following operating states: non-activated state, counting state and expired state.