Showing papers by "Rapeepat Ratasuk published in 2005"

Method to determine a scheduling priority value for a user data connection based on a quality of service requirement

Abstract: A method to provide a nominal best effort data rate based on a Quality of Service (QoS) requirement of a user data connection, the method comprising assigning ( 105 ) a service priority based on the QoS requirement, and assigning ( 110 ) the nominal best effort data rate for the service priority using a predetermined function. Further, it comprises of a method to determine a scheduling priority value for a user data connection by providing a relative fairness. Furthermore, the method comprises a method to satisfy a delay requirement for a delay sensitive data connection through a scheduling.

System and method for downlink signaling for high speed uplink packet access

Abstract: A wireless communication system (100) and method for providing high speed uplink packet access from user equipment (128, 130) to a base station (114, 116, 118, 120). Each user equipment (128, 130) and base station (114, 116, 118, 120) includes a transmitter (1106, 1206), a receiver (1104, 1204), and a controller (1108, 1208). The user equipment (128, 130) transmits data packets to the base station (114, 116, 118, 120). The base station transmits control information, corresponding to the data packets, to the user equipment (128, 130). The control information includes a busy bit to disable uplink transmission of a transmitter (1106) of the user equipment (123,130).

Acknowledgement method for ACK/NACK signaling to facilitate UE uplink data transfer

Abstract: To address the need to convey ACK/NACK information in a manner that conserves system and signaling resources, embodiments of the present invention employ a Node-B transmitting on two types of ACK/NACK broadcast channels ( 501, 502 ), one type for received uplink data that was scheduled by the Node B and the other type of broadcast channel for received uplink data that was not scheduled by the Node B. Other embodiments of the invention employ a Node-B transmitting on two types of broadcast channels, one type of broadcast channel for received uplink data that comes from non-SHO users and another type of broadcast channel for received uplink data that comes from non-scheduled users or comes from scheduled SHO users. In addition, ACK/NACK information is scheduled ( 800 ) into the available broadcast channel time slots in accordance with a transmission priority that is determined by a scheduler.

Method for rate control signaling to facilitate ue uplink data transfer

Abstract: Embodiments described herein address the desire to have a method for uplink rate control signaling that is able to achieve increased sector and user throughput with relatively high uplink spectrum efficiency. Rate control signaling embodiments are disclosed that use two common persistence values (404, 408) to update the allocated portion of RoT margin for each UE device, and thus, reduce the variation of the RoT. In addition, SHO information is used to control the inter-sector/cell interference and improve the sector throughput. In such embodiments, each UE determines (412) the data rate and time to transmit according to these common persistence values, SHO status and buffered data. Throughput comparable to that of time and rate schedulers, which require significantly more signaling and information, can be achieved by some of these embodiments while also exhibiting less sensitivity to delay, speed of the UE, and burstiness of the traffic.

Method and apparatus for uplink communication in a cellular communication system

Abstract: A cellular communication system (100) comprises a first base station (103) which schedules resource for a user equipment (101). When receiving a resource allocation message, the user equipment (101) transmits a first message comprising a transmit indication to a plurality of base stations (103-109) wherein the transmit indication is indicative of a subsequent transmission of a second message. The user equipment (101) then proceeds to determine a transmit format for the second message; and to transmit the second message to the plurality of base stations (103-109) using the transmit format. When receiving the transmit indication, the plurality of base stations (103-109) proceed to configure their receivers to receive the second message. The first message may be transmitted in a control channel and the second message may be transmitted in a user data channel.

Method and system for scheduling and resource allocation in a data communication network

Abstract: A method for scheduling and resource allocation in a data communication network ( 104 ) that transports data packets for a plurality of sessions is disclosed The method includes monitoring a packet delay of a session data packet awaiting transport ( 302 ) The method also includes re-evaluating a scheduling priority of the session data packet ( 304 ) The re-evaluation of the scheduling priority is based on one or more functions of the packet delay

Method and apparatus for outer-loop power control for enhanced uplink communications

Abstract: Various embodiments are described to address the need for an apparatus and method of outer-loop power control for enhanced uplink communications that address some of the outstanding problems in the prior art. Generally expressed, a base site (131), while a first uplink channel is inactive, monitors packet retransmissions to generate an uplink quality indicator. Here, packet retransmissions refers to the number of packet retransmissions used by a remote unit (101) to send packets to a base transceiver station (111) via at least one other uplink channel. Also, while the first uplink channel is inactive, the base site adjusts a signal-to-interference ratio (SIR) target for the first uplink channel based on the uplink quality indicator. Then, when the first uplink channel becomes active, the base site begins power controlling the first uplink channel using the SIR target.

Packet transmission redundancy selection apparatus and method

Abstract: A high speed downlink packet access communication system method that supports a plurality of redundancy variations that are characterized by at least a first parameter that comprises an indicator regarding self-decodability of a corresponding packet and a second parameter that comprises a selection of a particular redundancy version from amongst a plurality of candidate redundancy versions. Pursuant to a preferred approach, and upon determining a need to transmit redundant information as corresponds to a given packet, one automatically selects, for at least one of the first and second parameters, a specific value from amongst a plurality of candidate values and then uses the specific value to transmit the redundant information.

Scheduling and Resource Allocation of Enhanced Uplink for 3GPP W-CDMA

Abstract: Enhanced uplink technology is being standardized in release-6 of 3GPP W-CDMA specifications with the completion date of 2nd quarter of 2005. Advanced features being introduced include adaptive modulation and coding, hybrid ARQ, fast rate control or scheduling by the base station, higher peak rates (5.76 Mbps) and support of 2 ms TTI. These techniques reduce overall delay and increase throughput significantly compared to earlier releases of 3GPP W-CDMA (release-99/4/5). As a result, enhanced uplink significantly improves the user mobile experience and enable new services and applications. In this paper, the scheduling and resource allocation aspects of enhanced uplink are discussed with accompanying analysis and system simulation results. These results show that enhanced uplink improves sector and user throughput by approximately 50-80% compared to earlier 3GPP W-CDMA releases

Method for ack/nack signaling to facilitate ue uplink data transfer

Abstract: To address the need to convey ACK/NACK information in a manner that conserves system and signaling resources, embodiments of the present invention employ a Node-B transmitting on two types of ACK/NACK broadcast channels (501, 502), one type for received uplink data that was scheduled by the Node B and the other type of broadcast channel for received uplink data that was not scheduled by the Node B. Other embodiments of the invention employ a Node-B transmitting on two types of broadcast channels, one type of broadcast channel for received uplink data that comes from non-SHO users and another type of broadcast channel for received uplink data that comes from non-scheduled users or comes from scheduled SHO users. In addition, ACK/NACK information is scheduled (800) into the available broadcast channel time slots in accordance with a transmission priority that is determined by a scheduler.

Dynamic power allocation for multimedia broadcast/multicast service

Abstract: A communication system (100) is provided that dynamically allocates power to a Multimedia Broadcast/Multicast Service (an MBMS service). In response to determining (304) to establish a Point-to-Multipoint (PTM) communication channel to multiple user equipment (UEs) (102-104), the communication service assigns (306) the PTM communication channel to the MBMS service, determines (308) a power requirement associated with each user equipment (UE) of the multiple UEs based on a handover quality measurement associated with the UE to produce multiple power requirements, and allocates (310) a power level to the PTM communication channel based on the multiple power requirements. The communication system further dynamically adjusts the allocated power based on a handover quality measurement associated with a UE of the multiple UEs that is received during provision of the MBMS service.

User equipment for downlink signaling for high speed uplink packet access

Abstract: A wireless communication system (100) and method for providing high speed uplink packet access from user equipment (128, 130) to a base station (114, 116, 118, 120). Each user equipment (128, 130) and base station (114, 116, 118, 120) includes a transmitter (1106, 1206), a receiver (1104, 1204), and a controller (1108, 1208). The user equipment (128, 130) transmits data packets to the base station (114, 116, 118, 120). The base station transmits control information, corresponding to the data packets, to the user equipment (128, 130). The control information includes a control channel acknowledgement, CACK, field in an absolute grant channel assigned to the user equipment (128,130).