Abstract: The present invention relates to a protocol data unit (PDU) reordering method in a wireless communication system. The terminal maintains the number of bytes of PDUs stored in the buffer for reordering PDUs received in a sequence that is changed due to HARQ error correction to thereby prevent overflow of the reordering buffer. When the HARQ function unit transmits a PDU received at the radio access control RAS (S101), the PDU reordering unit of the access terminal sets a current frame number as an arrival frame number of the received PDU (S102). When a current frame number is stored as an arrival frame number of a received frame, the PDU reordering unit compares a sequence number (SN) of a received PDU with a sequence number of a PDU that is about to be reordered (S 103). If the PDU has already been reordered, the received PDU is discarded (S 104).

Abstract: Disclosed herein is a system and method for coupling communication terminals. In a communication method performed by a terminal coupler according to the present invention, sequence numbers are sequentially assigned to data packets received from a terminal end device. The data packets with the sequence numbers assigned thereto are individually transferred to a plurality of communication terminals belonging to a same group in conformity with preset scheduling policies. Data packets, received from the plurality of communication terminals belonging to the same group, are reordered by sequence numbers, and the reordered data packets are transferred to the terminal end device.

Abstract: A method for reassembling a medium access control (MAC) protocol data unit (PDU) of a receiver includes: receiving at least one hybrid automatic repeat request (HARQ) burst in an automatic repeat request (ARQ) disabled connection that does not support an ARQ function; extracting at least one fragment from at least one MAC PDU included in at least one HARQ burst; setting a new start point by comparing a predetermined start point with the sequence number of the fragment; and reassembling fragments having sequence numbers before the new start point.

Abstract: A method of performing a handover procedure of a handover performing apparatus in a wireless communication system in which a macro base station and a femto base station coexist is provided. The method of performing the handover procedure of the handover performing apparatus includes detecting an uplink signal transmitted from a terminal to the macro base station, sending a report message including information about the uplink signal to the macro base station, and performing the handover procedure with the terminal when the macro base station triggers handover based on the report message.

Abstract: A multi-FA personal subscriber station and a method of ordering protocol data units thereof having advantages of simultaneously accessing two frequency channels to transmit and receive data and appropriately ordering protocol data units transmitted through each frequency channel, thereby minimizing errors in TCP/IP packet transmission, are disclosed. According to the multi-FA personal subscriber terminal and the method of ordering protocol data units thereof according to exemplary embodiments of the present invention, two frequency channels are simultaneously accessed to transmit and receive data and protocol data units transmitted through each of the frequency channels are ordered, thereby minimizing errors in TCP/IP packet transmission.

Abstract: A transmitting/receiving apparatus of down-link data using an automatic repeat request (ARQ) scheme and a method thereof in a wireless communication system is provided. In order to send an ARQ feedback message between a base station and a terminal without a radio resource allocation process in a wireless communication system, when the base station receives down-link data from the terminal of the base station, the base station stores the number list of the transmitted frames and periodically detects the list and automatically allocates radio resources for up-link without an additional process when the list is larger than a predetermined frame. The radio resource allocation request process can be omitted because a radio resource is automatically allocated during the up-link period after the base station transmits the down-link traffic. Thus, the response speed of an ARQ feedback acknowledgement message is enhanced, thereby enhancing a down-link transmission speed.

Abstract: The present invention relates to an uplink framing method and apparatus in a mobile communication system. After a mobile terminal and a base station are connected to each other in a wireless manner, the base station allocates an uplink radio resource to a medium access control (MAC) layer of the mobile terminal, and then scheduling is performed for each connection in a buffer. Next, a packet data unit (PDU) is generated to satisfy the uplink time constraint and then transmitted to the base station. Therefore, hardware implementation complexity can be minimized in a mobile communication system that should support fast data transmission, and at the same time, a required uplink framing time can be minimized in a system that supports a short frame period.

Abstract: A look-ahead bandwidth requesting method and a mobile terminal using the look-ahead bandwidth requesting method in a mobile communication system are provided. The mobile terminal receives a downlink packet from a base station and transmits the downlink packet to a terminal equipment system. If the downlink packet received from the base station is a TCP packet, the mobile terminal transmits the TCP packet to the terminal equipment system and, at the same time, performs a bandwidth requesting procedure for being allocated a wireless resource through which a TCP ACK packet is to be transmitted to the base station. The bandwidth request is performed by using a random access procedure. The mobile terminal transmits the TCP ACK packet received from the terminal equipment system through the wireless resource that is allocated in advance by using the random access procedure to the base station.

Abstract: The present invention relates to an ARQ control apparatus and method. According to the present invention, a subscriber station performs initialization by communicating with a base station, and receives wireless link channel quality information; stores an SDU in an SDU buffer when the SDU is transmitted from an upper block, and establishes a connection with the base station for a corresponding service flow; receives QoS information on the service flow, ARQ information, and a CINR, and transmits them to the uplink scheduler; detects a TCP header of the SDU and stores TCP sequence number information; and performs a DSC for controlling an MAC ARQ window size with reference to the QoS information, ARQ information, CINR, and TCP congestion window size.

Abstract: The present invention relates to a scheduling method and device for guaranteeing a voice over Internet protocol (VoIP) quality of service (QoS) in a portable Internet system. In the portable Internet system, when a packet for connecting a session between a base station and a portable Internet terminal is input for a VoIP service between a VoIP terminal and a portable Internet terminal, the session is connected by transmitting/receiving the packet through a management connection of a media access control (MAC) layer. In addition, an unsolicited grant service (UGS) connection is established between the base station and the portable Internet terminal after connecting the session between the base station and the portable Internet terminal. Then, the packet including data for the VoIP service is transmitted/received through the UGS connection to perform a voice call. Accordingly, a high quality VoIP service may be provided in a bad propagation environment.

Abstract: A verification system and method for packet call processing of a mobile telephone. Each IP address is assigned to a terminal, a packet service simulator and the mobile telephone. The packet service simulator simulates a control signal of UTRAN necessary for the mobile telephone and connects data traffic to an internet after a packet call establishment. The packet service simulator transmits an IP packet generated from the terminal to its Ethernet address, receives a packet for the terminal and transmits it to the mobile telephone. For this, the packet service simulator responds to the terminal's ARP request. The terminal is linked to the mobile telephone via a PPP, and the mobile telephone and the packet service simulator to an external internet via an Ethernet.

Abstract: A transmitting/receiving apparatus of down-link data using an automatic repeat request (ARQ) scheme and a method thereof in a wireless communication system is provided. In order to send an ARQ feedback message between a base station and a terminal without a radio resource allocation process in a wireless communication system, when the base station receives down-link data from the terminal of the base station, the base station stores the number list of the transmitted frames and periodically detects the list and automatically allocates radio resources for up-link without an additional process when the list is larger than a predetermined frame. The radio resource allocation request process can be omitted because a radio resource is automatically allocated during the up-link period after the base station transmits the down-link traffic. Thus, the response speed of an ARQ feedback acknowledgement message is enhanced, thereby enhancing a down-link transmission speed.

Abstract: Disclosed are a system and method for transmitting/receiving an ARQ for correcting errors in an OFDM/TDMA terminal, and generating high-rate frames. The ARQ transmitting/receiving system of an OFDM/TDMA terminal comprises a CPU transmitting/receiving a data packet to/from an upper block in a software manner; an ARQ transmitting/receiving unit receiving the data packet, dividing the data packet into fragments each having a predetermined size, storing the fragments, generating a frame at the moment of generating a frame based on the stored fragment information, checking whether ARQ is retried or not, and transmitting/receiving the ARQ in a hardware manner; an interface buffer storing data transmitted between the CPU and the ARQ transmitting/receiving unit; and a fragment buffer storing fragments generated by the ARQ transmitting/receiving unit.

Abstract: A verification system and method for packet call processing of a mobile telephone. Each IP address is assigned to a terminal, a packet service simulator and the mobile telephone. The packet service simulator simulates a control signal of UTRAN necessary for the mobile telephone and connects data traffic to an Internet after a packet call establishment. The packet service simulator transmits an IP packet generated from the terminal to its Ethernet address, receives a packet for the terminal and transmits it to the mobile telephone. For this, the packet service simulator responds to the terminal's ARP request.