Abstract: A Radio Resource Control (RRC) message transmission method and apparatus for a wireless communication system operating in TTI and acknowledge mode is configured to reduce interruption time by minimizing retransmission times of RRC message. The message transmission method for a wireless communication system includes generating, at a transmitter, a message; transmitting the message two or more times consecutively from the transmitter to a receiver; analyzing, at a receiver, the message transmitted by the transmitter; transmitting an acknowledge message or a negative-acknowledge from the receiver to the transmitter depending on the analysis result; and terminating, at the transmitter, a retransmission process of the message upon receipt of the acknowledgement message.

Abstract: A method and apparatus manage a buffer of a lower network node in a communication system. A current queue length of the buffer is monitored in every measurement time. A logical region in which the current queue length is included is determined, among a plurality of logical regions included in the buffer. Each of the logical regions corresponds to a queue length determined by using an upper threshold and a lower threshold of a total queue length of the buffer. A congestion state of a network is detected, and a first queue length is readjusted when the current queue length is included in the first queue length which corresponds to a first logical region that exceeds the upper threshold. And a network congestion state signal that represents the detected congestion state of the network is transmitted to the upper network node.

Abstract: An apparatus and a method for flow control between a Packet Data Convergence Protocol (PDCP) layer and a Radio Link Control (RLC) layer in a communication system are provided. The method includes storing Service Data Units (SDUs) to be transferred to the RLC layer, receiving information on a capacity that is currently unused in a buffer of the RLC layer from the RLC layer, and generating Packet Data Units (PDUs) from SDUs, a capacity of which corresponds to the information, among packets stored in a buffer of the PDCP layer, and then transferring the generated PDUs to the RLC layer.

Abstract: Provided is a method of transmitting an Ethernet frame via a network bridge, the method includes receiving a frame header from a previous node connected to the network bridge; receiving a header cyclic redundancy check (CRC) flag and header CRC with respect to the frame header from the previous node; determining whether to forward the Ethernet frame including the frame header by referring to the header CRC flag and the header CRC; and forwarding the Ethernet frame from the previous node to a next node connected to the network bridge according to the determination.

Abstract: A proximity control method for transmitting a content and a network node using the proximity control method is provided. A proximity control method for transmitting a content performs a different proximity control mechanism depending on each of a single proximity control (SPC) domain, a mixed proximity control (MPC) domain, and a network-based service domain, and each of nodes performs the different proximity control mechanism based on a physical distance from a neighboring node, the nodes being comprised in the SPC domain, the MPC domain, and the network-based service domain.

Abstract: A method and an apparatus of a serving base station for determining handover of a terminal in a mobile communications system are provided, including determining whether a measurement report message is received from a User Equipment (UE); when receiving the measurement report message, determining whether a channel status value of the UE satisfies a preset condition during a certain time; and determining whether to hand over the UE according to the determination result.

Abstract: A method for performing congestion control in a communication system. The method includes transmitting a request message to a node using a first packet with a highest priority and receiving a response message corresponding to the request message using the first packet and at least one of a plurality of second packets, estimating a one-way delay of the first packet according to a round trip time for the first packet, converting one of the one-way delay of the first packet and the one-way delay of at least one of the plurality of second packets into a quality of service (QoS) level using a predetermined upper delay bound for a corresponding packet, and converting the converted QoS level into an effective congestion level representing a congestion degree in a network and performing congestion control using the effective congestion level.

Abstract: An apparatus is capable of setting HARQ and ARQ parameters in a mobile communication system. The apparatus sets HARQ and ARQ parameters in a mobile communication system. The apparatus sets a default HARQ parameter based on the determined default HARQ parameter setting condition determined by using a plurality of QCIs. The apparatus sets a default ARQ parameter based on the determined default ARQ parameter setting condition determined by using the plurality of QCIs, and updates the set default HARQ parameter and the set default ARQ parameter according to a channel status of a UE.

Abstract: An audio/vide bridging (AVB) system using an extended AVB reservation protocol, and a resource reservation method are provided where an AVB system using an extended AVB reservation protocol includes an egress device for transmitting a Generic Attribute Registration Protocol (GARP) or Multiple Registration Protocol (MRP) message comprising an AVB stream identifier or an application stream identifier to a relay device, the relay device for registering the AVB stream identifier or the application stream identifier according to the GARP/MRP message, and transmitting the GARP/MRP message comprising the application stream identifier, to an ingress device, and the ingress device for allocating the AVB stream identifier corresponding to the application stream identifier via the GARP/MRP message comprising the application stream identifier, and transmitting a reservation signal to the relay device.

Abstract: A system and method of providing a quality of service (QoS) is provided. The method of providing the QoS in the link layer includes receiving, by a stream providing device, minimum and maximum resource requirement information of a stream receiving device; transmitting, by the stream providing device, a reservation message including the minimum and maximum resource requirement information; allocating a resource, by at least one bridge, based on the reservation message transmitted from the stream providing device; and receiving, by the stream receiving device, a stream transmitted from the stream providing device via the resource.

Abstract: An apparatus and a method for flow control between a Packet Data Convergence Protocol (PDCP) layer and a Radio Link Control (RLC) layer in a communication system are provided. The method includes storing Service Data Units (SDUs) to be transferred to the RLC layer, receiving information on a capacity that is currently unused in a buffer of the RLC layer from the RLC layer, and generating Packet Data Units (PDUs) from SDUs, a capacity of which corresponds to the information, among packets stored in a buffer of the PDCP layer, and then transferring the generated PDUs to the RLC layer.

Abstract: A method and an apparatus of a serving base station for determining handover of a terminal in a mobile communications system are provided, including determining whether a measurement report message is received from a User Equipment (UE); when receiving the measurement report message, determining whether a channel status value of the UE satisfies a preset condition during a certain time; and determining whether to hand over the UE according to the determination result.

Abstract: A method and apparatus manage a buffer of a lower network node in a communication system. A current queue length of the buffer is monitored in every measurement time. A logical region in which the current queue length is included is determined, among a plurality of logical regions included in the buffer. Each of the logical regions corresponds to a queue length determined by using an upper threshold and a lower threshold of a total queue length of the buffer. A congestion state of a network is detected, and a first queue length is readjusted when the current queue length is included in the first queue length which corresponds to a first logical region that exceeds the upper threshold. And a network congestion state signal that represents the detected congestion state of the network is transmitted to the upper network node.

Abstract: An apparatus is capable of setting HARQ and ARQ parameters in a mobile communication system. The apparatus sets HARQ and ARQ parameters in a mobile communication system. The apparatus sets a default HARQ parameter based on the determined default HARQ parameter setting condition determined by using a plurality of QCIs. The apparatus sets a default ARQ parameter based on the determined default ARQ parameter setting condition determined by using the plurality of QCIs, and updates the set default HARQ parameter and the set default ARQ parameter according to a channel status of a UE.

Abstract: A method for performing congestion control in a communication system. The method includes transmitting a request message to a node using a first packet with a highest priority and receiving a response message corresponding to the request message using the first packet and at least one of a plurality of second packets, estimating a one-way delay of the first packet according to a round trip time for the first packet, converting one of the one-way delay of the first packet and the one-way delay of at least one of the plurality of second packets into a quality of service (QoS) level using a predetermined upper delay bound for a corresponding packet, and converting the converted QoS level into an effective congestion level representing a congestion degree in a network and performing congestion control using the effective congestion level.

Abstract: Provided is a method of transmitting an Ethernet frame via a network bridge, the method includes receiving a frame header from a previous node connected to the network bridge; receiving a header cyclic redundancy check (CRC) flag and header CRC with respect to the frame header from the previous node; determining whether to forward the Ethernet frame including the frame header by referring to the header CRC flag and the header CRC; and forwarding the Ethernet frame from the previous node to a next node connected to the network bridge according to the determination.

Abstract: Provided is a method of transmitting an Ethernet frame via a network bridge, the method includes receiving a frame header from a previous node connected to the network bridge; receiving a header cyclic redundancy check (CRC) flag and header CRC with respect to the frame header from the previous node; determining whether to forward the Ethernet frame including the frame header by referring to the header CRC flag and the header CRC; and forwarding the Ethernet frame from the previous node to a next node connected to the network bridge according to the determination.

Abstract: A Radio Resource Control (RRC) message transmission method and apparatus for a wireless communication system operating in TTI and acknowledge mode is configured to reduce interruption time by minimizing retransmission times of RRC message. The message transmission method for a wireless communication system includes generating, at a transmitter, a message; transmitting the message two or more times consecutively from the transmitter to a receiver; analyzing, at a receiver, the message transmitted by the transmitter; transmitting an acknowledge message or a negative-acknowledge from the receiver to the transmitter depending on the analysis result; and terminating, at the transmitter, a retransmission process of the message upon receipt of the acknowledgement message.

Abstract: Provided are a guaranteed services method and apparatus in bridged LAN. streams are transmitted through bridges to a plurality of listener stations in a distributed network, and each bridge performs filtering, stream group registration and authentication for the streams. Accordingly, quality of service (QoS) in a distributed network can be improved. Furthermore, streams to the plurality of listener stations can be guaranteed.

Abstract: A system and method of providing a quality of service (QoS) is provided. The method of providing the QoS in the link layer includes receiving, by a stream providing device, minimum and maximum resource requirement information of a stream receiving device; transmitting, by the stream providing device, a reservation message including the minimum and maximum resource requirement information; allocating a resource, by at least one bridge, based on the reservation message transmitted from the stream providing device; and receiving, by the stream receiving device, a stream transmitted from the stream providing device via the resource.