[특허]Medium access control for orthogonal frequency-division multiple-access (OFDMA) cellular networks

[미국특허] Medium access control for orthogonal frequency-division multiple-access (OFDMA) cellular networks 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04Q-007/00 H04J-011/00 H04B-011/00
출원번호	US-0685977 (2000-10-10)
발명자 / 주소	Liu,Hui Li,Xiaodong Mu,Fuqi
출원인 / 주소	Adaptix, Inc.
대리인 / 주소	Fulbright &
인용정보	피인용 횟수 : 153 인용 특허 : 39

초록 ▼

A method and apparatus for controlling OFDMA cellular networks is described. In one embodiment, the method comprises receiving channel characteristics and noise-plus-interference information measured at spatially distributed subscribers and assigning traffic channels for an orthogonal frequency-divi

대표청구항 ▼

We claim: 1. A cellular network comprising: a plurality of subscribers each of said subscribers communicating with one base station of a plurality of base stations using orthogonal frequency division multiple access (OFDMA); each of said base stations having logic to coordinate multiple-access and information exchange between the base station and the plurality of subscribers, the logic selecting a set of OFDMA traffic channels from a plurality of candidate OFDMA traffic channels, based on feedback OFDMA channel information collected from the plurality of subscribers and OFDMA channel information collected from at least one of the other base stations, and in collaboration with said at least one other base station to provide joint OFDMA channel allocation to multiple ones of said plurality of subscribers. 2. The network defined in claim 1 wherein the logic calculates spatial gains of uplink and downlink channels based on responses of spatially separated receivers at the base station. 3. The network defined in claim 1 wherein the feedback information comprises channel fading information and noise and interference levels for each of the plurality of candidate OFDMA traffic channels. 4. The network defined in claim 1 wherein the plurality of subscribers send the feedback information in response to a sounding signal from each of one or more of the base stations. 5. The network defined in claim 1 wherein said logic selects a combination of modulation and coding schemes based on the SINR of the selected traffic channel for each accessing subscriber. 6. The network defined in claim 1 wherein the logic comprises medium access control (MAC) logic. 7. A method comprising: sending sounding signals to a plurality of subscribers from a plurality of base stations; receiving, at each base station, channel condition information for a plurality of OFDMA traffic channels from at least one of said subscribers and at least one other base station; and performing OFDMA multi-user traffic channel assignment to assign OFDMA traffic channels from the plurality of OFDMA traffic channels to the plurality of subscribers, based on the OFDMA channel condition information received from at least one of said subscribers and at least one other of said base stations and estimated spatial gains for the uplink and downlink signals for the plurality of subscribers, and in collaboration with said at least one other of said base stations to provide joint OFDMA channel allocation to multiple ones of said plurality of subscribers. 8. The method defined in claim 7 wherein the channel condition information comprises information regarding estimated channel gains and channel interference for the plurality of OFDMA traffic channels. 9. The method defined in claim 7 wherein performing traffic channel assignment is based on channel conditions between one or more antennas at a base station and one or more antennas at subscriber locations. 10. The method defined in claim 7 further comprising estimating spatial gains for uplink and downlink signals. 11. The method defined in claim 10 further comprising estimating signal-to-noise-plus-interference rates (SINRs) for the uplink and downlink signals, and wherein performing channel assignment is based on the SINRs for the uplink and downlink signals. 12. The method defined in claim 11 wherein estimating SINRs for the uplink and downlink signals is performed on all OFDMA traffic channels for all active and accessing subscribers. 13. The method defined in claim 11 wherein performing channel assignment is based on quality of service (QoS) requirements. 14. The method defined in claim 13 wherein the QoS requirements include one or more of the following: data rate, time-out, bit error rate, and writing time. 15. The method defined in claim 13 wherein performing channel assignment is based on priority. 16. The method defined in claim 7 further comprising determining a combination of coding and modulation schemes when performing channel assignments. 17. The method defined in claim 7 wherein performing traffic channel assignments comprises said plurality of base stations coordinating to perform the traffic channel assignment. 18. The method defined in claim 17 wherein each of the plurality of base stations is within a cell and estimates SINRs for uplink and downlink signals across all OFDMA traffic channels for accessing subscribers. 19. The method defined in claim 18 when the plurality of base stations perform estimates for active and accessing subscribers. 20. The method defined in claim 7 wherein the sounding signal is omni-directional. 21. The method defined in claim 7 wherein estimating spatial gains for uplink and downlink signals comprises: estimating broadband spatial channels across the plurality of OFDMA traffic channels for each accessing subscriber; determining the spatial processing gains for uplink and downlink signals on each of the plurality of OFDMA traffic channels; predicting signal-to-noise-plus-interference ratio (SINR) for uplink and downlink transmission with spatial processing over each of available OFDMA traffic channels by adding the spatial processing gain to downlink signal strength feedback from one or more subscribers. 22. A method comprising: receiving, at one of a plurality of base stations, OFDMA channel characteristics and noise-plus-interference information measured at spatially distributed subscribers; receiving OFDMA channel characteristics information for at least one other base station; and assigning OFDMA traffic channels for an OFDMA network, based on received OFDMA channel characteristics and noise-plus-interference information measured at the spatially distributed subscribers and the OFDMA channel characteristics information from the at least one other base station, and in collaboration with at least said one other base station to provide joint OFDMA channel allocation to multiple ones of said subscribers. 23. The method defined in claim 22 wherein assigning traffic channels is performed for the OFDMA network that uses spatial multiplexing. 24. A method comprising: each of a plurality of subscribers estimating channel gains and noise-plus-interference levels of a set of OFDMA traffic channels in response to a sounding signal; the plurality of subscribers transmitting to a first base station measured OFDMA channel and noise-plus-interference information; receiving, by one of said subscribers, an allocation of one or more OFDMA traffic channels allocated, in response to the measured channel and noise-plus-interference information and OFDMA channel information from a plurality of base stations including a second base station other than the first base station, and in collaboration with at least said second base station to provide joint OFDMA channel allocation to multiple ones of said plurality of subscribers; at least one of the plurality of subscribers transmitting packets using one or more allocated OFDMA traffic channels. 25. The method defined in claim 24 wherein the plurality of subscribers transmit the measured channel and noise-plus-interference information on pre-allocated channels. 26. The method defined in claim 24 wherein the plurality of subscribers transmits the measured channel and noise-plus-interference information when paged or when one or more of the plurality of subscribers have a packet to transmit to the first base station. 27. An apparatus comprising: an OFDMA channel and noise-plus-interference estimator; an access signal generator coupled to the estimator; an OFDM modem coupled to the generator; and a radio frequency transmitter to transmit information on OFDMA traffic channels jointly allocated to a plurality of subscribers through a collaborative OFDMA channel assignment among multiple base stations. 28. The apparatus defined in claim 27 wherein the estimator estimates channel gains and noise-plus-interference levels in a pre-determined set of traffic channels. 29. The apparatus defined in claim 28 wherein the generator encodes channel and noise-plus-interference information to form an access signal. 30. The apparatus defined in claim 29 wherein the OFDM modem modulates the access signal and transmits a modulated version of the access signal through an access channel. 31. The apparatus defined in claim 30 wherein the access channel comprises at least a subset of all traffic channels during and access time slot. 32. An apparatus comprising: at least one spatially separated transceiver; an access signal detector and demodulator coupled to the at least one spatially separated transceivers; a spatial channel and spatial gain estimator; an uplink and downlink signal-to-noise-plus-interference estimator; a multi-user traffic channel allocator coupled to said estimators to determine OFDMA channel assignment based on broadband spatial channel estimates and measured OFDMA channel and noise-plus-interference information feedback from subscribers and from at least two base stations to provide joint OFDM channel allocation to multiple subscribers; and an OFDM modem coupled to the allocator. 33. The apparatus defined in claim 32 wherein the allocator determines traffic channel assignment and a code and modulation combination for each accessing subscriber, and the OFDM modem modulates the traffic channel assignment and transmits a modulated version of the traffic channel assignment to at least one subscriber. 34. The apparatus defined in claim 32 wherein the broadband spatial channel estimates comprise the broadband spatial channel between a base station and each accessing subscriber. 35. The apparatus defined in 32 wherein the access signal detector and demodulator detects access signals transmitted by subscribers and demodulates the measured channel and noise-plus-interference information feedback from subscribers.

이 특허에 인용된 특허 (39) 인용/피인용 타임라인 분석

Li Ye ; Sollenberger Nelson Ray, Adaptive antenna arrays for orthogonal frequency division multiplexing systems with co-channel interference.
상세보기
Frodigh Carl Magnus,SEX ; Gudmundson Perols Leif Mikael,SEX, Adaptive channel allocation in a frequency division multiplexed system.
상세보기
Larsson Per .ANG.ke,SEX ; Frodigh Carl Magnus,SEX ; Almgren Knut Magnus,SEX, Adaptive channel allocation method and apparatus for multi-slot, multi-carrier communication system.
상세보기
Yun Louis C. ; Ottersten Bjorn E.,SEX, Channel assignment and call admission control for spatial division multiple access communication systems.
상세보기
Cimini Leonard Joseph ; Daneshrad Babak ; Sollenberger Nelson Ray, Clustered OFDM communication system.
상세보기
Borst Simon C. ; Grandhi Sudheer A. ; Huang Joe ; Kahn Colin L. ; Kumaran Krishnan ; Zhang Bulin B., Cost-function-based dynamic channel assignment for a cellular system.
상세보기
Abu-Dayya Adnan,CAX, Determining SINR in a communications system.
상세보기
Williams Thomas H., Digital transmission system with high immunity to dynamic linear distortion.
상세보기
Clark Christopher Joseph ; Moulthrop Andrew Alfred ; Muha Michael Steven ; Silva Christopher Patrick, Frequency translating device transmission response system.
상세보기
Chow Peter S. (Redwood City CA) Cioffi John M. (Cupertino CA), Method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digita.
상세보기
Keijiro Take JP, Method and apparatus for assigning codes.
상세보기
Greenstein Lawrence Joel ; Sollenberger Nelson Ray, Method and apparatus for enhancing communication reception at a wireless communication terminal.
상세보기
Dent Paul W., Method and apparatus for mitigating intermodulation effects in multiple-signal transmission systems.
상세보기
Cimini ; Jr. Leonard Joseph ; Sollenberger Nelson Ray, Method and apparatus for mobile data communication.
상세보기
Kotzin Michael D. ; Stewart Kenneth A., Method and apparatus for reducing self interference in a communication system.
상세보기
Lindroth Magnus Lars,SEX ; Chambert Georg,SEX ; Bodin Roland Stig,SEX, Method and apparatus for regulating transmission power.
상세보기
Hakkinen Hannu,FIX ; Rikkinen Kari,FIX ; Pehkonen Kari,FIX, Method and equipment for multirate coding and detection in a multiple access mobile communication system.
상세보기
Sampath, Hemanth; Sebastian, Peroor K.; Paulraj, Arogyaswami J., Method and system for mode adaptation in wireless communication.
상세보기
Bruckert Eugene J. (Arlington Heights IL), Method for assigning channel reuse levels in a multi-level cellular system.
상세보기
Alamouti Siavash ; Casas Eduardo F.,CAX ; Hirano Michael ; Hoole Elliott ; Jesse Mary ; Michelson David G.,CAX ; Poon Patrick ; Veintimilla Gregory J. ; Zhang Hongliang, Method for frequency division duplex communications.
상세보기
Honkasalo Zhi-Chun ; Liimatainen Pasi,FIX ; Kapadia Sona ; Noneman John, Method for scheduling packet data transmission.
상세보기
Farsakh Christof,DEX, Method of channel allocation.
상세보기
Heath ; Jr. Robert W. ; Sebastian Peroor K. ; Paulraj Arogyaswami J., Methods of controlling communication parameters of wireless systems.
상세보기
Chouly Antoine (Paris FRX) Brajal Amrico (Villeneuve Le Roi FRX) Jourdan Sabine (Savigny Sur Orge FRX), Multi-user spread spectrum communication system.
상세보기
Barton, Melbourne; Wong, Kouk-Shoong Daniel, Multicarrier personal access communication system.
상세보기
Fattouche Michel (156 Hawkwood Blvd N.W. Calgary ; Alberta CAX T3G 2T2 ) Zaghloul Hatim (402 - 1st Ave. N.E. Calgary ; Alberta CAX T2E 0B4 ), Multicode direct sequence spread spectrum.
상세보기
Vincent K. Jones, IV ; Jonathan Leary ; James M. Gardner, OFDM channel estimation in the presence of interference.
상세보기
Haim Harel ; Anthony J. Weiss IL; Yair Karmi IL; Ilan Zorman, Power control in two-way paging systems.
상세보기
Chow Jacky S., Protocol for transceiver initialization.
상세보기
Ritter Gerhard,DEX, Radio system with frequency optimization.
상세보기
Roy ; III Richard H. (Cupertino CA) Ottersten Bjorn (Stockholm SEX), Spatial division multiple access wireless communication systems.
상세보기
Paulraj Arogyaswami J. ; Heath ; Jr. Robert W. ; Sebastian Peroor K. ; Gesbert David J., Spatial multiplexing in a cellular network.
상세보기
Shively Richard Robert ; Sonalkar Ranjan V., Spread spectrum bit allocation algorithm.
상세보기
Chuang Justin Che-I ; Sollenberger Nelson Ray, System and method for dynamically assigning channels for wireless packet communications.
상세보기
Balachandran Krishna ; Nanda Sanjiv ; Kadaba Srinivas R. ; Ejzak Richard P., System and method for measuring channel quality information.
상세보기
Vincent K. Jones, IV ; Gregory G. Raleigh ; Derek Gerlach, System for interference cancellation.
상세보기
Alamouti, Siavash; Becker, Joel E.; Stolarz, Douglas Frank, Vertical adaptive antenna array for a discrete multitone spread spectrum communications system.
상세보기
Arogyaswami J. Paulraj ; Peroor K. Sebastian ; Jose Tellado ; Robert W. Heath, Jr. ; Shilpa Talwar ; Helmut Bolcskei, Wireless communication system and method using stochastic space-time/frequency division multiplexing.
상세보기
Mohamed Anisur Rahman, Wireless system and method for evaluating quality of service.
상세보기

이 특허를 인용한 특허 (153) 인용/피인용 타임라인 분석

Khandekar, Aamod; Gorokhov, Alexei; Agrawal, Avneesh; Rangan, Sundeep; Das, Arnab, Acknowledgement of control messages in a wireless communication system.
상세보기
Gore, Dhananjay Ashok; Gorokhov, Alexei; Sampath, Hemanth; Ji, Tingfang; Kadous, Tamer, Adaptive sectorization in cellular systems.
상세보기
Gerlach, Christian Georg, Adaptive subcarrier allocation to a mobile terminal in a multi cell FDM or OFDM network.
상세보기
Ko, Young-Jo; Ahn, Jae-Young; Kim, Kwang-Soon; Kwon, Jung-Hyoung; Whang, Keum-Chan, Adaptive transmission device using limited feedback information in a mobile communication system, and a method thereof.
상세보기
Ko, Young-Jo; Ahn, Jae-Young; Kim, Kwang-Soon; Kwon, Jung-Hyoung; Whang, Keum-Chan, Adaptive transmission device using limited feedback information in a mobile communication system, and a method thereof.
상세보기
Ko, Young-Jo; Ahn, Jae-Young; Kim, Kwang-Soon; Kwon, Jung-Hyoung; Whang, Keum-Chan, Adaptive transmission device using limited feedback information in a mobile communication system, and a method thereof.
상세보기
Fitzek,Frank Hanns Paul; Wijting,Carl Simon; Theeuwes,Jeroen; Popovski,Petar; Prasad,Ramjee; Suh,Chang Ho; Yoon,Seok Hyun; Hong,Sung Kwon; Cho,Young Kwon; Kim,Young Kyun; Park,Dong Seek; Ro,Jung Min, Apparatus and method for assigning subcarrier in OFDMA communication system.
상세보기
Hwang, In Seok; Yoon, Soon Young; Sung, Sang Hoon; Cho, Jae Hee; Huh, Hoon; Roh, Kwan Hee, Apparatus and method for assigning subchannels in an OFDMA communication system.
상세보기
Yoon, Seok Hyun; Suh, Chang Ho; Cho, Young Kwon; Chae, Chan Byoung; Ro, Jung Min, Apparatus and method for dynamically assigning resources in an OFDM communication system.
상세보기
Tee, Lai King; van Rensburg, Cornelius; Ding, Yinong, Apparatus and method using multiple modulation schemes in an OFDM/OFDMA wireless network.
상세보기
Stolpman,Victor; Terry,John, Apparatus, and associated method, for facilitating communication allocation in a radio communication system.
상세보기
Agrawal, Avneesh; Khandekar, Aamod; Gorokhov, Alexei, Assignment acknowledgement for a wireless communication system.
상세보기
Fujita, Hiroshi; Yoshida, Makoto, Base station apparatus, uplink SINR measuring method, uplink scheduling method, and reception-quality measuring method.
상세보기
Li, Haitao; Li, Jifeng, Carrier allocation method in multi cell orthogonal frequency division multiple access system.
상세보기
Sousa, Elvino S.; Kasapi, Athanasios A.; Trott, Mitchell D., Channel assignment based on spatial strategies in a wireless network using adaptive antenna arrays.
상세보기
Gore, Dhananjay Ashok; Gorokhov, Alexei Yurievitch; Ji, Tingfang; Khandekar, Aamod Dinkar; Kadous, Tamer Adel, Channel quality reporting for adaptive sectorization.
상세보기
Gore, Dhananjay Ashok; Gorokhov, Alexei; Ji, Tingfang; Khandekar, Aamod; Kadous, Tamer, Channel quality reporting for adaptive sectorization.
상세보기
Ji, Tingfang; Naguib, Ayman; Sutivong, Arak; Gore, Dhananjay Ashok; Gorokhov, Alexei, Channel structures for a quasi-orthogonal multiple-access communication system.
상세보기
Ji, Tingfang; Naguib, Ayman; Sutivong, Arak; Gore, Dhananjay Ashok; Gorokhov, Alexei, Channel structures for a quasi-orthogonal multiple-access communication system.
상세보기
Odenwalder, Joseph P.; Sarkar, Sandip, Code division multiplexing commands on a code division multiplexed channel.
상세보기
Palanki, Ravi; Khandekar, Aamod Dinkar; Sutivong, Arak, Code division multiplexing in a single-carrier frequency division multiple access system.
상세보기
Palanki, Ravi; Khandekar, Aamod; Sutivong, Arak, Code division multiplexing in a single-carrier frequency division multiple access system.
상세보기
Tiedemann, Jr., Edward G.; Damnjanovic, Aleksandar; Jain, Avinash; Malladi, Durga P.; Oses, David Puig; Gaal, Peter; Lundby, Stein; Sarkar, Sandip; Chen, Tao; Wei, Yongbin; Willenegger, Serge, Combining grant, acknowledgement, and rate control commands.
상세보기
Tiedemann, Jr., Edward G.; Damnjanovic, Aleksandar; Jain, Avinash; Malladi, Durga P.; Oses, David Puig; Gaal, Peter; Lundby, Stein; Sarkar, Sandip; Chen, Tao; Wei, Yongbin; Willenegger, Serge, Combining grant, acknowledgement, and rate control commands.
상세보기
Ode, Takayoshi; Kawasaki, Yoshihiro; Kawabata, Kazuo, Communications apparatus and communications system using multicarrier transmission mode.
상세보기
Ode, Takayoshi; Kawasaki, Yoshihiro; Kawabata, Kazuo, Communications apparatus and communications system using multicarrier transmission mode.
상세보기
Ode, Takayoshi; Kawasaki, Yoshihiro; Kawabata, Kazuo, Communications apparatus and communications system using multicarrier transmission mode.
상세보기
Legouable, Rodolphe; Callonnec, Denis; Helard, Maryline, Determination of the time delay and/or power of a multicarrier signal.
상세보기
Ramanathan, Parmeswaran; Mundarath, Jayakrishnan C.; Van Veen, Barry, Distributed scheduling method for multi-antenna wireless system.
상세보기
Calhoun,Patrice R., Distributed wireless network security system.
상세보기
Sutivong, Arak; Teague, Edward Harrison; Gorokhov, Alexei, Efficient signaling over access channel.
상세보기
Sutivong, Arak; Teague, Edward Harrison; Gorokhov, Alexei, Efficient signaling over access channel.
상세보기
Sutivong, Arak; Teague, Edward Harrison; Gorokhov, Alexei Yurievitch, Efficient signaling over access channel.
상세보기
Bitran, Yigal; Semel, Noah, Energy-efficient uplink slot allocation in time-frequency division multiple access systems.
상세보기
Gore, Dhananjay Ashok; Palanki, Ravi, Frequency division multiple access schemes for wireless communication.
상세보기
Gore, Dhananjay Ashok; Palanki, Ravi, Frequency division multiple access schemes for wireless communication.
상세보기
Palanki, Ravi, Frequency hopping design for single carrier FDMA systems.
상세보기
Palanki, Ravi, Frequency hopping design for single carrier FDMA systems.
상세보기
Attar, Rashid Ahmed Akbar; Damnjanovic, Aleksandar; Malladi, Durga Prasad; Grilli, Francesco, Handover mechanism that exploits uplink channel quality of a target cell.
상세보기
Attar, Rashid Ahmed Akbar; Damnjanovic, Aleksandar; Malladi, Durga Prasad; Grilli, Francesco, Handover mechanism that exploits uplink channel quality of a target cell.
상세보기
Sutivong, Arak; Naguib, Ayman Fawzy; Agrawal, Avneesh, Interference and noise estimation in an OFDM system.
상세보기
Mese, Murat; Sutivong, Arak; Julian, David Jonathan, Interference control in a wireless communication system.
상세보기
Mese, Murat; Sutivong, Arak; Julian, David Jonathan, Interference control in a wireless communication system.
상세보기
Mese, Murat; Sutivong, Arak; Julian, David Jonathan; Ji, Tingfang, Interference control in a wireless communication system.
상세보기
Mese, Murat; Sutivong, Arak; Julian, David Jonathan; Ji, Tingfang, Interference control in a wireless communication system.
상세보기
Oyman, Ozgur, Link adaptation and antenna selection in cooperative multiple access systems.
상세보기
Bitran, Yigal; Yagil, Ariel, Low peak-to-average power ratio transmission in frequency-division multiple access systems.
상세보기
Bitran, Yigal; Yagil, Ariel, Low peak-to-average power ratio transmission in frequency-division multiple access systems.
상세보기
Meiyappan, Palaniappan, Method and apparatus for adaptive carrier allocation and power control in multi-carrier communication systems.
상세보기
Borran, Mohammad Jaber; Khandekar, Aamod; Gorokhov, Alexei; Ji, Tingfang; Bhushan, Naga; Zhang, Xin; Kannan, Arumugam Chendamarai, Method and apparatus for adjustments for delta-based power control in wireless communication systems.
상세보기
Lee, Jae Hyok; Jeon, Jae Ho; Yoon, Soon Young; Maeng, Seung Joo; Oh, Jeong Tae; Jang, Ji Ho, Method and apparatus for allocating channels in an orthogonal frequency division multiple access system.
상세보기
Kadous, Tamer; Khandekar, Aamod; Gore, Dhananjay Ashok; Gorokhov, Alexei, Method and apparatus for antenna diversity in multi-input multi-output communication systems.
상세보기
Teague, Edward Harrison; Ulupinar, Fatih; Prakash, Rajat; Khandekar, Aamod, Method and apparatus for bootstraping information in a communication system.
상세보기
Nanda, Sanjiv; Damnjanovic, Aleksandar, Method and apparatus for controlling data rate of a reverse link in a communication system.
상세보기
Chapman,Peter William; Bauer,Benedict Gerrard; Carsten,Ralph Thomas, Method and apparatus for directional transmission of high bandwidth traffic on a wireless network.
상세보기
Agrawal, Avneesh; Milikovsky, Dmitry R.; Black, Peter J., Method and apparatus for estimating reverse link loading in a wireless communication system.
상세보기
Borran, Mohammad J.; Gorokhov, Alexei; Khandekar, Aamod; Ji, Tingfang; Kannan, Aru Chendamarai, Method and apparatus for fast other sector interference (OSI) adjustment.
상세보기
Borran, Mohammad Jaber; Gorokhov, Alexei; Khandekar, Aamod; Ji, Tingfang; Kannan, Arumugam Chendamarai, Method and apparatus for fast other sector interference (OSI) adjustment.
상세보기
Wang, Jibing; Kadous, Tamer; Gore, Dhananjay Ashok, Method and apparatus for pre-coding frequency division duplexing system.
상세보기
Kadous, Tamer; Khandekar, Aamod; Gore, Dhananjay Ashok; Gorokhov, Alexei, Method and apparatus for providing antenna diversity in a wireless communication system.
상세보기
Malladi, Durga P., Method and apparatus for providing uplink signal-to-noise ratio (SNR) estimation in a wireless communication system.
상세보기
Malladi, Durga P., Method and apparatus for providing uplink signal-to-noise ratio (SNR) estimation in a wireless communication system.
상세보기
van Rensburg, Cornelius; Ji, Baowei; Tsai, Jiann-An, Method and system for polling mobile stations in a wireless network.
상세보기
Xing, Guanbin; Shen, Manyuan; Liu, Hui, Method and system for switching antenna and channel assignments in broadband wireless networks.
상세보기
Xing, Guanbin; Shen, Manyuan; Liu, Hui, Method and system for switching antenna and channel assignments in broadband wireless networks.
상세보기
Xing, Guanbin; Shen, Manyuan; Liu, Hui, Method and system for switching antenna and channel assignments in broadband wireless networks.
상세보기
Zuniga, Juan Carlos; Hunkeler, Teresa, Method for performing wireless switching.
상세보기
Zuniga, Juan Carlos; Hunkeler, Teresa J., Method for performing wireless switching.
상세보기
Zuniga, Juan Carlos; Hunkeler, Teresa Joanne, Method for performing wireless switching.
상세보기
Ayyagari, Deepak; Chan, Wai-Chung, Method for transitioning between coordination modes for interfering neighbor networks.
상세보기
Ginzburg, Boris; Levy, Shmuel, Method of multiple-input-multiple-output wireless communication.
상세보기
Ayyagari, Deepak; Chan, Wai-Chung, Methods and systems for frequency and time division access.
상세보기
Chin, Tom; Lee, Kuo-Chun, Methods and systems for mobile WiMAX three-way downlink concurrent processing and three-way handover.
상세보기
Chin, Tom; Lee, Kuo-Chun, Methods and systems for mobile wimax three-way downlink concurrent processing and three-way handover.
상세보기
Ayyagari, Deepak; Chan, Wai-Chung, Methods and systems for network coordination.
상세보기
Liu, Changwen; Li, Qinghua; Stacey, Robert J.; Stephens, Adrian P, Multi-antenna multicarrier receiver and methods for adaptively adjusting a receive data rate based on channel utilization.
상세보기
Li, Xiaodong; Liu, Hui; Zhang, Wenzhong; Li, Kemin, Multi-carrier communications with adaptive cluster configuration and switching.
상세보기
Li, Xiaodong; Liu, Hui; Zhang, Wenzhong; Li, Kemin, Multi-carrier communications with adaptive cluster configuration and switching.
상세보기
Li, Xiaodong; Liu, Hui; Zhang, Wenzhong; Li, Kemin, Multi-carrier communications with adaptive cluster configuration and switching.
상세보기
Li, Xiaodong; Liu, Hui; Zhang, Wenzhong; Li, Kemin, Multi-carrier communications with adaptive cluster configuration and switching.
상세보기
Li, Xiaodong; Liu, Hui; Zhang, Wenzhong; Li, Kemin, Multi-carrier communications with adaptive cluster configuration and switching.
상세보기
Li, Xiaodong; Liu, Hui; Zhang, Wenzhong; Li, Kemin, Multi-carrier communications with adaptive cluster configuration and switching.
상세보기
Li, Xiaodong; Liu, Hui; Zhang, Wenzhong; Li, Kemin, Multi-carrier communications with adaptive cluster configuration and switching.
상세보기
Li, Xiaodong; Liu, Hui; Zhang, Wenzhong; Li, Kemin, Multi-carrier communications with adaptive cluster configuration and switching.
상세보기
Li, Xiaodong; Liu, Hui; Zhang, Wenzhong; Li, Kemin, Multi-carrier communications with adaptive cluster configuration and switching.
상세보기
Nanda, Sanjiv; Surineni, Shravan K.; Walton, J. Rodney, Multiple frequency band operation in wireless networks.
상세보기
Nanda, Sanjiv; Surineni, Shravan K.; Walton, Jay Rodney, Multiple frequency band operation in wireless networks.
상세보기
Laroia, Rajiv; Li, Junyi, OFDM communications methods and apparatus.
상세보기
Mahmoud, Ashraf S. Hasan; Al-Rayyah, Ali Yaseen, OFDMA power allocation method.
상세보기
Li, Xiaodong; Liu, Hui; Li, Kemin; Zhang, Wenzhong, OFDMA with adaptive subcarrier-cluster configuration and selective loading.
상세보기
Li, Xiaodong; Liu, Hui; Li, Kemin; Zhang, Wenzhong, OFDMA with adaptive subcarrier-cluster configuration and selective loading.
상세보기
Li, Xiaodong; Liu, Hui; Li, Kemin; Zhang, Wenzhong, OFDMA with adaptive subcarrier-cluster configuration and selective loading.
상세보기
Li, Xiaodong; Liu, Hui; Li, Kemin; Zhang, Wenzhong, OFDMA with adaptive subcarrier-cluster configuration and selective loading.
상세보기
Li, Xiaodong; Liu, Hui; Li, Kemin; Zhang, Wenzhong, OFDMA with adaptive subcarrier-cluster configuration and selective loading.
상세보기
Li, Xiaodong; Liu, Hui; Li, Kemin; Zhang, Wenzhong, OFDMA with adaptive subcarrier-cluster configuration and selective loading.
상세보기
Li, Xiaodong; Liu, Hui; Li, Kemin; Zhang, Wenzhong, OFDMA with adaptive subcarrier-cluster configuration and selective loading.
상세보기
Li, Xiaodong; Liu, Hui; Zhang, Wenzhong; Li, Kemin, OFDMA with adaptive subcarrier-cluster configuration and selective loading.
상세보기
Li, Xiaodong; Liu, Hui; Zhang, Wenzhong; Li, Kemin, OFDMA with adaptive subcarrier-cluster configuration and selective loading.
상세보기
Sampath, Hemanth; Kadous, Tamer, Performance based rank prediction for MIMO design.
상세보기
Gorokhov, Alexei; Naguib, Ayman Fawzy; Sutivong, Arak; Gore, Dhananjay Ashok; Ji, Tingfang, Pilot signal transmission for an orthogonal frequency division wireless communication system.
상세보기
Gorokhov, Alexei; Naguib, Ayman Fawzy; Sutivong, Arak; Gore, Dhananjay Ashok; Ji, Tingfang, Pilot signal transmission for an orthogonal frequency division wireless communication system.
상세보기
Gorokhov, Alexei; Naguib, Ayman Fawzy; Sutivong, Arak; Gore, Dhananjay Ashok; Ji, Tingfang, Pilot signal transmission for an orthogonal frequency division wireless communication system.
상세보기
Khandekar, Aamod; Agrawal, Avneesh; Gore, Dhananjay Ashok, Pilot symbol transmission in wireless communication systems.
상세보기
Sutivong, Arak; Julian, David Jonathan; Agrawal, Avneesh, Power control for a wireless communication system utilizing orthogonal multiplexing.
상세보기
Sutivong, Arak; Julian, David Jonathan; Agrawal, Avneesh, Power control for a wireless communication system utilizing orthogonal multiplexing.
상세보기
Sutivong, Arak; Julian, David Jonathan; Agrawal, Avneesh, Power control for a wireless communication system utilizing orthogonal multiplexing.
상세보기
Gorokhov, Alexei; Gore, Dhananjay Ashok; Barriac, Gwendolyn D.; Wang, Jibing; Kadous, Tamer, Precoding and SDMA support.
상세보기
Gorokhov, Alexei; Dong, Min, Puncturing signaling channel for a wireless communication system.
상세보기
Sutivong, Arak; Agrawal, Avneesh, Quasi-orthogonal multiplexing for a multi-carrier communication system.
상세보기
Sutivong, Arak; Agrawal, Avneesh, Quasi-orthogonal multiplexing for a multi-carrier communication system.
상세보기
Khandekar, Aamod; Gorokhov, Alexei, Resource allocation for shared signaling channels.
상세보기
Sutivong, Arak; Agrawal, Avneesh, Reverse link power control in an orthogonal system.
상세보기
Sutivong, Arak; Agrawal, Avneesh; Julian, David Jonathan, Robust erasure detection and erasure-rate-based closed loop power control.
상세보기
Sampath, Hemanth, Robust rank prediction for a MIMO system.
상세보기
Ji, Tingfang; Gore, Dhananjay Ashok; Gorokhov, Alexei; Dong, Min; Agrawal, Avneesh, SDMA resource management.
상세보기
Khandekar, Aamod Dinkar; Gorokhov, Alexei Yurievitch; Agrawal, Avneesh; Vijayan, Rajiv; Teague, Edward Harrison; Ulupinar, Fatih, Scalable frequency band operation in wireless communication systems.
상세보기
Khandekar, Aamod; Gorokhov, Alexei; Agrawal, Avneesh; Vijayan, Rajiv; Teague, Edward Harrison; Ulupinar, Fatih, Scalable frequency band operation in wireless communication systems.
상세보기
Khandekar, Aamod; Gorokhov, Alexei; Agrawal, Avneesh; Vijayan, Rajiv; Teague, Edward Harrison; Ulupinar, Fatih, Scalable frequency band operation in wireless communication systems.
상세보기
Chen, Tao; Tiedemann, Jr., Edward G.; Jain, Avinash, Scheduled and autonomous transmission and acknowledgement.
상세보기
Chen, Tao; Tiedemann, Jr., Edward G.; Jain, Avinash, Scheduled and autonomous transmission and acknowledgement.
상세보기
Nakatsugawa, Keiichi; Suga, Junichi, Scheduling method, wireless base station, and wireless terminal.
상세보기
Gorokhov, Alexei Y.; Ji, Tingfang, Segment sensitive scheduling.
상세보기
Gorokhov, Alexei Y.; Ji, Tingfang, Segment sensitive scheduling.
상세보기
Gorokhov, Alexei; Ji, Tingfang, Segment sensitive scheduling.
상세보기
Khandekar, Aamod; Gorokhov, Alexei; Gore, Dhananjay Ashok; Teague, Edward Harrison; Dong, Min, Shared signaling channel.
상세보기
Laroia, Rajiv; Li, Junyi; Uppala, Sathya, Signaling method in an OFDM multiple access system.
상세보기
Laroia, Rajiv; Li, Junyi; Uppala, Sathya, Signaling method in an OFDM multiple access system.
상세보기
Laroia, Rajiv; Li, Junyi; Uppala, Sathya, Signaling method in an OFDM multiple access system.
상세보기
Laroia, Rajiv; Li, Junyi; Uppala, Sathya, Signaling method in an OFDM multiple access system.
상세보기
Laroia, Rajiv; Li, Junyi; Uppala, Sathyadev Venkata, Signaling method in an OFDM multiple access system.
상세보기
Laroia, Rajiv; Li, Junyi; Uppala, Sathyadev Venkata, Signaling method in an OFDM multiple access system.
상세보기
Laroia, Rajiv; Li, Junyi; Uppala, Sathyadev Venkata, Signaling method in an OFDM multiple access system.
상세보기
Laroia, Rajiv; Li, Junyi; Uppala, Sathyadev Venkata, Signaling method in an OFDM multiple access system.
상세보기
Laroia, Rajiv; Li, Junyi; Uppala, Sathyadev Venkata, Signaling method in an OFDM multiple access system.
상세보기
Laroia, Rajiv; Li, Junyi; Uppala, Sathyadev Venkata, Signaling method in an OFDM multiple access system.
상세보기
Laroia, Rajiv; Li, Junyi; Uppala, Sathyadev Venkata, Signaling method in an OFDM multiple access system.
상세보기
Sampath, Hemanth; Kadous, Tamer, Sphere decoding apparatus.
상세보기
Ho, Sai Yiu Duncan; Damnjanovic, Aleksandar; Gholmieh, Aziz; Tiedemann, Jr., Edward G.; Bao, Gang; Nanda, Sanjiv, System and method for scheduling transmissions in a wireless communication system.
상세보기
Sampath, Hemanth; Kadous, Tamer; Gorokhov, Alexei; Gore, Dhananjay Ashok, Systems and methods for beamforming and rate control in a multi-input multi-output communication systems.
상세보기
Sampath, Hemanth; Khandekar, Aamod; Gore, Dhananjay Ashok; Gorokhov, Alexei; Kadous, Tamer, Systems and methods for beamforming feedback in multi antenna communication systems.
상세보기
Sampath, Hemanth; Gorokhov, Alexei; Khandekar, Aamod; Teague, Edward Harrison; Julian, David Jonathan; Kadous, Tamer; Sutivong, Arak, Systems and methods for control channel signaling.
상세보기
Park, Daniel J.; Ayyagari, Deepak; Peponides, George M.; Petranovich, James E., Systems and methods for dynamic network channel modification.
상세보기
Park, Daniel J.; Ayyagari, Deepak; Peponides, George M.; Petranovich, James E., Systems and methods for network channel allocation.
상세보기
Park, Daniel J.; Ayyagari, Deepak; Peponides, George M.; Petranovich, James E., Systems and methods for network channel characteristic measurement and network management.
상세보기
Rajaee, Amir; Park, Cheol Hee; Xiao, Gang; Shahidi, Reza; Munif, Muhammad Arif, Systems and methods for uplink activity management.
상세보기
Odenwalder, Joseph P., Systems and methods for using code space in spread-spectrum communications.
상세보기
Odenwalder, Joseph P., Systems and methods for using code space in spread-spectrum communications.
상세보기
Malladi, Durga Prasad; Willenegger, Serge; Zhang, Xiaoxia, Systems and methods for using selectable frame durations in a wireless communication system.
상세보기
Agrawal, Avneesh; Khandekar, Aamod; Gorokhov, Alexei; Teague, Edward Harrison, Use of supplemental assignments to decrement resources.
상세보기
Zangi, Kambiz; Krasny, Leonid, Using spatial properties of MIMO channels for enhanced channel estimation in MIMO systems.
상세보기
Gorokhov, Alexei; Khandekar, Aamod; Teague, Edward Harrison; Sampath, Hemanth, Varied signaling channels for a reverse link in a wireless communication system.
상세보기
Gorokhov, Alexei; Teague, Edward Harrison; Khandekar, Aamod, Varied transmission time intervals for wireless communication system.
상세보기
Kishigami, Takaaki; Okamura, Shutai; Yomo, Hidekuni; Kawai, Yoshihito, Wireless base station and terminal equipment.
상세보기

활용도 분석정보

상세보기

다운로드

내보내기

활용도 Top5 특허

해당 특허가 속한 카테고리에서 활용도가 높은 상위 5개 콘텐츠를 보여줍니다.
더보기 버튼을 클릭하시면 더 많은 관련자료를 살펴볼 수 있습니다.

IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증

[미국특허] Medium access control for orthogonal frequency-division multiple-access (OFDMA) cellular networks 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허에 인용된 특허 (39) 인용/피인용 타임라인 분석

이 특허를 인용한 특허 (153) 인용/피인용 타임라인 분석

활용도 분석정보

활용도 Top5 특허

관련 콘텐츠

특허 원문 보기

IPC 상위 출원인

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트

연합인증

[미국특허] Medium access control for orthogonal frequency-division multiple-access (OFDMA) cellular networks 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

전체(0) 논문(0) 특허(0) 보고서(0)

전체(0) 논문(0) 특허(0) 보고서(0)

이 특허에 인용된 특허 (39) 인용/피인용 타임라인 분석

이 특허를 인용한 특허 (153) 인용/피인용 타임라인 분석

활용도 분석정보

활용도 Top5 특허 더보기

관련 콘텐츠

특허 원문 보기

IPC 상위 출원인

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트

활용도 Top5 특허