Device in distributed wireless personal area network and data slot allocation method
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04Q-007/24
H04L-012/26
출원번호
US-0247213
(2005-10-12)
등록번호
US-7424001
(2008-09-09)
우선권정보
KR-10-2005-0037119(2005-05-03)
발명자
/ 주소
Kim,Yong suk
Cho,Jun haeng
출원인 / 주소
Samsung Electronics Co., Ltd.
대리인 / 주소
Sughrue Mion, PLLC
인용정보
피인용 횟수 :
5인용 특허 :
2
초록▼
A data slot allocation method allowing a plurality of devices in a wireless personal area network (WPAN) to satisfy the required QoS condition for the data stream transmission. The method includes allocating a specific number of data slots of a superframe to the plurality of the devices based on the
A data slot allocation method allowing a plurality of devices in a wireless personal area network (WPAN) to satisfy the required QoS condition for the data stream transmission. The method includes allocating a specific number of data slots of a superframe to the plurality of the devices based on the QoS information; additionally allocating a certain number of data slots to a first device when the first device transmitting a data stream is allocated data slots less than a number of required data slots for the data stream transmission; and reserving the additional data slots for the first device by reducing a number of data slots to be allocated to the other devices, excluding the first device. Accordingly, the data slots can be fairly distributed to the devices.
대표청구항▼
What is claimed is: 1. A data slot allocation method for a plurality of devices in a distributed wireless personal area network (WPAN), the method comprising: transmitting and receiving, at the plurality of the devices, quality of service (QoS) information required to transmit data streams via a co
What is claimed is: 1. A data slot allocation method for a plurality of devices in a distributed wireless personal area network (WPAN), the method comprising: transmitting and receiving, at the plurality of the devices, quality of service (QoS) information required to transmit data streams via a common control channel, and allocating a first specific number of data slots to the plurality of the devices based on the QoS information; checking the QoS information and additionally allocating a second specific number of data slots to a first device upon determining that the first device transmitting one of the data streams is allocated data slots less than a number of required data slots for the data stream transmission in current superframe; and reserving the additionally allocated data slots for the first device by calculating a QoS satisfaction degree using the number of required data slots and a number of desired data slots and reducing a number of data slots to be allocated to other devices in proportion to the calculated QoS satisfaction degree in next superframe. 2. The data slot allocation method of claim 1, wherein the QoS information contains at least one of a data stream index, the number of required data slots, and a number of desired data slots. 3. A data slot allocation method for a plurality of devices in a distributed wireless personal area network (WPAN), the method comprising: transmitting and receiving, at the plurality of the devices, quality of service (QoS) information required to transmit data streams via a common control channel, and allocating a first specific number of data slots to the plurality of the devices based on the QoS information; additionally allocating a second specific number of data slots to a first device when the first device transmitting one of the data streams is allocated data slots less than a number of required data slots for the data stream transmission; and reserving the additionally allocated data slots for the first device by reducing a number of data slots to be allocated to other devices, wherein the QoS information contains at least one of a data stream index, the number of required data slots, and a number of desired data slots, said method further comprising: calculating, at the other devices, a QoS satisfaction degree based on an equation; where n is a superframe number, SOQ(n) is a satisfaction degree of QoS at an n-th superframe, R(n) is the number of the required data slots at the n-th superframe, D(n) is the number of the desired data slots at the n-th superframe, and S(n) is a number of the data slots allocated from the n-th superframe. 4. The data slot allocation method of claim 3, wherein the other devices reserve the additionally allocated data slots for the first device by calculating the second specific number of data slots in proportion to the calculated QoS satisfaction degree and subtracting the calculated second specific number of data slots from a number of data slots allocated from a current superframe. 5. The data slot allocation method of claim 4, further comprising: joining, at a second device, the distributed WPAN; obtaining the number of required data slots of streams delivered over the distributed WPAN and subtracting the obtained number of required data slots from a total number of data slots; and allocating a third specific number of data slots to the second device when the number of required data slots of the second devices is less than the result of the subtraction. 6. A data slot allocation method for a device in a distributed wireless personal area network (WPAN), the method comprising: receiving from neighbor devices at least one of a data stream index, a number of required data slots, and a number of desired data slots; determining whether there is a first device among the neighbor devices, the first device transmitting a stream with allocated data slots less than the number of the required data slots; and calculating a number of data slots to be allocated from a next superframe that fall below a number of data slots allocated from a current superframe by calculating a QoS degree using the number of required data slots and the number of desired data slots and reducing the number of data slots to be allocated in proportion to the calculated Qos satisfaction degree when the first device is determined to exist. 7. A data slot allocation method for a device in a distributed wireless personal area network (WPAN), the method comprising: receiving from neighbor devices at least one of a data stream index, a number of required data slots, and a number of desired data slots; determining whether there is a first device among the neighbor devices, the first device transmitting a stream with allocated data slots less than the number of the required data slots; and calculating a number of data slots to be allocated from a next superframe that fall below a number of data slots allocated from a current superframe when the first device is determined to exist, wherein the calculation of the number of the data slots allocated from the next superframe comprises: calculating quality of service (QoS) satisfaction degree based on an equation, where n is a superframe number, SOQ(n) is a QoS satisfaction degree at an n-th superframe, R(n) is the number of required data slots at the n-th superframe, D(n) is the number of desired data slots at the n-th superframe, and S(n) is a number of data slots allocated from the n-th superframe; calculating the number of data slots allocated from the next superframe in proportion to the QoS satisfaction degree; and subtracting the calculated number of the data slots allocated from the next superframe from a number of data slots allocated from a current superframe. 8. A device operating in a distributed wireless personal area network (WPAN), comprising: a communication section which receives from neighbor devices quality of service (QoS) information that contains at least one of a data stream index, a number of required data slots, and a number of desired data slots; a determination section which determines whether there is a first device among the neighbor devices, the first device allocated data slots less than the number of required data slots; and a controller which calculates a number of data slots to be allocated from a next superframe that fall below a number of data slots allocated from a current superframe by calculating a QoS degree using the number of required data slots and the number of desired data slots and reducing the number of data slots to be allocated in proportion to the calculated Qos satisfaction degree when the first device is determined. 9. A device operating in a distributed wireless personal area network (WPAN), comprising: a communication section which receives from neighbor devices quality of service (QoS) information that contains at least one of a data stream index, a number of required data slots and a number of desired data slots: a determination section which determines whether there is a first device among the neighbor devices, the first device allocated data slots less than the number of reciuired data slots; and a controller which calculates a number of data slots to be allocated from a next superframe that fall below a number of data slots allocated from a current superframe when the first device is determined, wherein the controller calculates QoS satisfaction degree based on an equation, where n is a superframe number, SOQ(n) is a QoS satisfaction degree at an n-th superframe, R(n) is a number of required data slots at the n-th superframe, D(n) is a number of desired data slots at the n-th superframe, and S(n) is a number of data slots allocated from the n-th superframe, and the controller calculates the number of data slots to be allocated from the next superframe by calculating the number of data slots to be allocated from the next superframe in proportion to the calculated QoS satisfaction degree and subtracting the calculated number of the data slots to be allocated from the next superframe from the number of the data slots allocated from the current superframe. 10. The device of claim 9, wherein the communication section receives the QoS information via a common control channel.
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