Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Geon-Min Yeo

Byung-Han Ryu

Won Geun Ryu

Young-Il Kim

Kang-Hee Kim

The present application relates to a scheduling device and method of a mobile communication system. In the packet scheduling method, a base station performs packet scheduling for a terminal station in a mobile communication system, and a transport channel comprising an uplink shared channel (UL-SCH) and a physical channel comprising an uplink grant channel (UL-GCH) between the terminal and the base station are classified into a plurality of channels. In addition, in the packet scheduling method: a) the base station receives scheduling information from the terminal; b) the base station allocates an uplink resource for uplink traffic transmission for terminal based on the received scheduling information; and c) information for the allocated uplink resource is transmitted to the terminal through the UL-GCH of the physical channel.

Method for scheduling in mobile communication and apparatus thereof

A method of retransmitting a packet for low-power wireless sensor communications of a coordinator in a sensor network is provided. The method includes receiving packets from a plurality of sensor devices during a plurality of guaranteed time slots (GTSs) of a Contention Free Period (CFP) which are allocated to the respective sensor devices; checking whether there is an error in each of the received packets; generating one GTS Bulk ACK frame that contains pieces of ACK information to be transmitted to the respective sensor devices, according to the error check results; and transmitting the generated GTS Bulk ACK frame to the plurality of sensor devices.

Method and apparatus for retransmitting packet for low-power wireless sensor communications

Provided is a timer-based resource requesting method in a mobile telecommunication system. The resource requesting method includes the steps of: a) waiting in a waiting mode for an event to occur while a timer of a terminal operates; b) transmitting scheduling information including information on a quantity of packets existing in a terminal buffer to a base station when operation of the timer ends at a predetermined threshold time; and c) initializing the timer.

Method for requesting resource based on timer in mobile telecommunication systems

The present invention relates to a resource request and a packet scheduling method for uplink traffic in a mobile communication system. For efficient scheduling of the uplink traffic, a base station and user equipment (UE) determines a scheduling method according to characteristics of the traffic when performing negotiation therebetween. The traffic may be classified into traffic that generating a fixed-size packet in a periodical time interval, traffic that generates a variable-size packet in a periodic time interval, and traffic that generates a variable-size packet in a random time interval. Therefore, the UE requests a resource in accordance with the characteristics of the traffic and the base station performs scheduling according to the characteristics of the traffic such that an optimal uplink packet scheduling can be achieved.

Method for requesting resource and scheduling for uplink traffic in mobile communication and apparatus thereof

The present invention relates to a resource allocation requesting method and a packet scheduling method for uplink packet traffic in a mobile communication system, and an apparatus of the packet scheduling method. For efficient scheduling for the uplink traffic, scheduling is performed according to characteristics of traffic between a base station and user equipment (UE). Particularly, when the traffic generates a variable size packet on a periodic basis, the traffic is classified into first traffic that generates a completely variable size packet on a periodic basis and second traffic that generates a quasi-variable size packet on a periodic basis. In addition, the UE requests resource allocation in a different form from the base station depending on the type of traffic, and the base station performs scheduling according to the resource allocation request. Therefore, the UE requests resource allocation in accordance with traffic characteristics and the base station performs scheduling according to the traffic characteristics so that optimal uplink scheduling can be performed.

Provided is a method for retransmission in a mobile communication system; and, more particularly, to an integrated operation method of Automatic Retransmission Request (ARQ) and Hybrid Automatic Retransmission Request (HARQ) in a mobile communication system. The method includes the steps of: a) shifting to a 2layer waiting status upon receipt of 1layer reception failure information in a sending status that a fragment block of 2layer transmission data is transmitted to the a receiver according to the predetermined retransmission number; b) shifting to a 1layer receiving status upon receipt of 1layer reception success information in the sending status; and c) shifting to the transmission completion status upon receipt of the 2layer reception success information in the sending status.

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Daejeon, South Korea

Geon-Min Yeo