Apparatuses, systems, and methods for a wireless device to manage an uplink bearer that utilizes concurrent inter-RAT dual uplink connectivity to avoid packet loss during bearer switch, handover, and/or radio link failure occasions. The wireless device may establish a first wireless link according to a first radio access technology (RAT) and a second wireless link according to a second RAT. A data bearer may be established that utilizes both the first wireless link and the second wireless link. Uplink data packets of the data bearer that are provided to a protocol stack for the second RAT may be stored in a buffer. The second wireless link may be lost. The stored uplink data packets that were provided to the protocol stack for the second RAT may be provided to a protocol stack for the first RAT based at least in part on the second wireless link being lost.

Techniques are described for improving service continuity for Multicast and Broadcast Services (MBS) communications during handover. Techniques are included for supporting lossless handover and data forwarding during handover for peer-to-multiple (PTM) MBS transmission. Lossless handover may be achieved in part by the user equipment (UE) providing to the target base station an indication of the next packet of the MBS session to be received following an RRC reconfiguration message, and an indication of any MBS packets provided by the source base station prior to the RRC reconfiguration message that were not properly received by the UE. Data forwarding may be performed from the source base station to the target base station if the MBS session was not configured on the target base station prior to the handover. Data forwarding may be omitted if the MBS session was configured on the target base station prior to the handover.

The present invention relates to a method of transmitting a scheduling request (SR) by a user equipment (UE) in a wireless communication system, wherein the UE is connected to a first network. In particular, the method includes the steps of: performing a random access procedure with a second network; and based on the random access procedure being successfully performed, discarding packets which are stored in a buffer for transmission to the first network.

A communication control method according to an embodiment is a communication control method for controlling communication of a user terminal. The communication control method comprises: transmitting, by a cellular base station, data of a predetermined layer, via a WLAN access point to the user terminal; and transmitting, by the user terminal, delivery acknowledgement information based on the received data, via the WLAN access point to the cellular base station.

A method is disclosed for tearing down a TCP connection between a transmission control protocol (TCP) client in a radio access network (RAN) and a TCP server, comprising: receiving, at the TCP client, an indication to close the TCP connection; sending, from the TCP client to the TCP server, a TCP segment with a FIN bit set to indicate termination of the TCP connection; and closing, at the TCP client, the TCP connection without waiting for double the maximum segment lifetime period, thereby releasing the radio bearer resources and achieving radio bearer resource optimization.

A method is disclosed for avoiding unnecessary keepalive data transfers, comprising: receiving, at an upstream TCP connection endpoint in a radio access network (RAN) from an operator core network, an Internet Protocol (IP) packet; performing, at the upstream TCP connection endpoint, shallow packet inspection on the IP packet; and forwarding the IP packet to the downstream TCP connection endpoint in the RAN if the IP packet is not a keepalive packet, based on the performed shallow packet inspection. The upstream TCP connection endpoint in the RAN may be one of a nodeB, an eNodeB, a base transceiver station (BTS), a coordinating server, and a mobile edge computing (MEC) gateway. The downstream TCP connection endpoint in the RAN may be one of the nodeB, the eNodeB, or the base transceiver station (BTS).

Apparatuses, methods, and systems are disclosed for indicating data status to a target base unit. One apparatus includes a transceiver that communicates with a remote unit and a processor. The processor determines to handover the remote unit to a target base unit. The processor forwards data for the remote unit to the target base unit and transmits the forwarded data to the remote unit. The processor also sends a status message to the target base unit, the status message indicating that forwarded data was successfully transmitted to the remote unit.

When a condition of handing over user equipment from a cell in which a first network device is located to a cell in which a second network device is located is met, the first network device sends first information to the second network device, where the first information includes at least one of a CWND, a slow start threshold, a window scale factor, a RWND, and a TCP segment length; the slow start threshold is a value of demarcation between a slow start state and a congestion state; the window scale factor is a window scale factor carried in a SYN packet when a TCP connection is set up; the RWND is a maximum data volume that can be received by the user equipment; and the TCP segment length is a length of a maximum TCP segment that can be sent by the first network device.

A method of operating a communications device for transmitting signals to and/or receiving signals from a wireless communications network is provided. The method comprises determining that the communications device has uplink data to transmit to the wireless communications network, transmitting to a first cell of the wireless communications network, while the communications device is located within a coverage region of the first cell, one or more of a plurality of portions of the uplink data, determining, as a result of a change in a relative position of the communications device with respect to the coverage region of the first cell, that the communications device should select a different cell to continue the transmission of the uplink data, selecting a second cell of the wireless communications network, and receiving, from the second cell, a reconfiguration message.

Some embodiments include an apparatus, method, and computer program product for access point (AP)-assisted AP transition. Using AP-assisted AP transitions, when the STA is associated with a first access point (AP) and is transitioning to a second AP, a station (STA) can transmit to the second AP a control signal including a first indication for sequence number (SN) maintenance. The STA can receive from the second AP responsive to the first indication for SN maintenance, a first downlink (DL) transmission including a next SN. The next SN can be a continuation of an SN sequence utilized by the first AP for one or more previous DL transmissions.