METHOD AND SYSTEM FOR MULTI-CARRIER PACKET COMMUNICATION WITH REDUCED OVERHEAD
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Accused Products
Abstract
A method and system for minimizing the control overhead in a multi-carrier wireless communication network that utilizes a time-frequency resource is disclosed. In some embodiments, one or more zones in the time-frequency resource are designated for particular applications, such as a zone dedicated for voice-over-IP (VoIP) applications. By grouping applications of a similar type together within a zone, a reduction in the number of bits necessary for mapping a packet stream to a portion of the time-frequency resource can be achieved. In some embodiments, modular coding schemes associated with the packet streams may be selected that further reduce the amount of necessary control information. In some embodiments, packets may be classified for transmission in accordance with application type, QoS parameters, and other properties. In some embodiments, improved control messages may be constructed to facilitate the control process and minimize associated overhead.
17 Citations
66 Claims
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1-36. -36. (canceled)
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37. A communication method for a mobile device in an orthogonal frequency division multiple access (OFDMA) wireless packet system including a plurality of base stations and mobile devices in a plurality of geographic cells, each mobile device having an identifier that is assigned by the system, the method comprising:
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receiving a signal over a time-frequency resource region contained in a plurality of frames, the signal carrying packets destined to a number of mobile devices with a plurality of modulation and coding schemes using an integer multiple of basic time-frequency resource units, wherein each frame is divided into a plurality of time slots, each time slot consists of a plurality of orthogonal frequency division multiplexing (OFDM) symbols, each OFDM symbol contains a plurality of frequency subcarriers, and the basic time-frequency resource unit contains a number of subcarriers in a number of OFDM symbols; and identifying from the signal a plurality of packets that are destined to the mobile device using a time index or a frequency index of the time-frequency resource region in conjunction with the identifier assigned to the mobile device. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A communication method for a base station in an orthogonal frequency division multiple access (OFDMA) wireless packet system including a plurality of base stations and mobile devices in a plurality of geographic cells, each mobile device having an identifier that is assigned by the system, the method comprising:
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allocating a time-frequency resource region in a plurality of frames for carrying packets to a number of mobile devices with a plurality of modulation and coding schemes using an integer multiple of basic time-frequency resource units, wherein each frame is divided into a plurality of time slots, each time slot consists of a plurality of orthogonal frequency division multiplexing (OFDM) symbols, each OFDM symbol contains a plurality of frequency subcarriers, and the basic time-frequency resource unit contains a number of subcarriers in a number of OFDM symbols; generating a plurality of packets for a mobile device in the system and scheduling transmission of the plurality of packets in the time-frequency resource region in a manner that allows the mobile device to recover the plurality of packets using a time index or a frequency index of the time-frequency resource region in conjunction with the identifier assigned to the mobile device; and transmitting the plurality of packets to the mobile device. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. In an orthogonal frequency division multiple access (OFDMA) wireless packet system including a plurality of base stations in a plurality of geographic cells, a mobile device having an identifier that is assigned by the system, the mobile device comprising:
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a facility configured for receiving a signal over a time-frequency resource region contained in one or more frames, the signal carrying packets destined to a number of mobile devices with a plurality of modulation and coding schemes using an integer multiple of basic time-frequency resource units, wherein each frame is divided into a plurality of time slots, each time slot consists of a plurality of orthogonal frequency division multiplexing (OFDM) symbols, each OFDM symbol contains a plurality of frequency subcarriers, and the basic time-frequency resource unit contains a number of subcarriers in a number of OFDM symbols; and a facility configured for identifying from the signal a plurality of packets that are destined to the mobile device using a time index or a frequency index of the time-frequency resource region in conjunction with the identifier assigned to the mobile device. - View Dependent Claims (60, 61, 62)
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63. A base station in an orthogonal frequency division multiple access (OFDMA) wireless packet system including a plurality of mobile devices in a plurality of geographic cells, each mobile device having an identifier that is assigned by the system, the base station comprising:
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a facility configured for allocating a time-frequency resource region in one or more frames for carrying packets to a number of mobile devices with a plurality of modulation and coding schemes using an integer multiple of basic time-frequency resource units, wherein each frame is divided into a plurality of time slots, each time slot consists of a plurality of orthogonal frequency division multiplexing (OFDM) symbols, each OFDM symbol contains a plurality of frequency subcarriers, and the basic time-frequency resource unit contains a number of subcarriers in a number of OFDM symbols; a facility configured for generating a plurality of packets for a mobile device in the system and scheduling transmission of the plurality of packets in the time-frequency resource region in a manner that allows the mobile device to recover the plurality of packets using a time index or a frequency index of the time-frequency resource region in conjunction with the identifier assigned to the mobile device; and a transmitter configured for transmitting the plurality of packets to the mobile device. - View Dependent Claims (64, 65, 66)
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Specification