US20080080434A1 - Method and apparatus of system scheduler - Google Patents

Method and apparatus of system scheduler Download PDF

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Publication number
US20080080434A1
US20080080434A1 US11/529,726 US52972606A US2008080434A1 US 20080080434 A1 US20080080434 A1 US 20080080434A1 US 52972606 A US52972606 A US 52972606A US 2008080434 A1 US2008080434 A1 US 2008080434A1
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United States
Prior art keywords
frequency
antenna
space time
codes
transmission
Prior art date
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Abandoned
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US11/529,726
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English (en)
Inventor
Guy Wolf
Daniel Yellin
Ilan Sutskover
Yona Perets
Nadav Shulman
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Intel Corp
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Intel Corp
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39230528&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20080080434(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to US11/529,726 priority Critical patent/US20080080434A1/en
Application filed by Intel Corp filed Critical Intel Corp
Priority to BRPI0717567-1 priority patent/BRPI0717567B1/pt
Priority to KR1020097006161A priority patent/KR101052368B1/ko
Priority to PCT/US2007/079465 priority patent/WO2008039805A1/en
Priority to RU2009110752/09A priority patent/RU2428793C2/ru
Priority to JP2009530563A priority patent/JP5301445B2/ja
Priority to EP07843180.6A priority patent/EP2067277B1/en
Priority to CN2007800317895A priority patent/CN101507138B/zh
Publication of US20080080434A1 publication Critical patent/US20080080434A1/en
Assigned to INTEL CORPORATION reassignment INTEL CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SHULMAN, NADAV, WOLF, GUY, PERETS, YONA, YELLIN, DANIEL, SUTSKOVER, ILAN
Priority to US12/613,122 priority patent/US8072941B2/en
Priority to US12/612,875 priority patent/US20100061348A1/en
Priority to US13/163,711 priority patent/US8532065B2/en
Priority to JP2012050130A priority patent/JP2012142981A/ja
Priority to US13/488,499 priority patent/US8379602B2/en
Priority to US13/492,877 priority patent/US8379604B2/en
Priority to US13/492,872 priority patent/US8379603B2/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
    • H04B7/0669—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different channel coding between antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/068—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission using space frequency diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/12—Frequency diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618—Space-time coding
    • H04L1/0637—Properties of the code
    • H04L1/0668—Orthogonal systems, e.g. using Alamouti codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H04L5/0046—Determination of how many bits are transmitted on different sub-channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0697—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using spatial multiplexing

Definitions

  • Next generation cellular networks may provide higher data rate compared to current and prior wireless technologies.
  • LTE Long Term Evolution
  • MIMO multiple input multiple output
  • MIMO schemes may be characterized by different features For example, MIMO using diversity schemes (e.g. Alamouti space time block codes, space time trellis ⁇ Turbo codes, and etc.) and MIMO using multiplexing schemes.
  • Diversity schemes limit the over all channel variations in compare to single input single output (SISO) channel and effect the signal to noise (SNR) per link, thus improves the quality of service (QoS) of individual links.
  • SISO single input single output
  • SNR signal to noise
  • the network scheduler assigns users to share substantially the same Time ⁇ Frequency (T ⁇ F) resources and interference is eliminated by receiver and/or transmitter (Rx ⁇ Tx) beam-forming techniques or by interference cancellation ⁇ suppression at the receiver.
  • Rx ⁇ Tx receiver and/or transmitter
  • interference cancellation ⁇ suppression at the receiver In wireless systems which may operating according to these diversity schemes, a user link may suffer larger variations in signal to noise ratio (SNR) due to rapid variation of an interference. Thus, the QoS per link may be degraded.
  • FIG. 1 is a schematic illustration of a wireless communication system according to exemplary embodiments of the present invention
  • FIG. 2 is a schematic time symbol/frequency slots diagram of a multiplexing scheme in OFDM according to an exemplary embodiment of the invention
  • FIG. 3 is a schematic time symbol/frequency slots diagram of a multiplexing scheme in SC-FDMA according to another exemplary embodiment of the invention.
  • FIGS. 4 and 5 are diagrams helpful to demonstrate a wireless communication system performance according to embodiments of the present invention.
  • the present invention may be used in a variety of applications. Although the present invention is not limited in this respect, the circuits and techniques disclosed herein may be used in many apparatuses such as transmitters and/or receivers of a radio system. Transmitters and/or receivers intended to be included within the scope of the present invention may be included, by way of example only, within a wireless local area network (WLAN), two-way radio communication system, digital communication system, analog communication system transmitters, cellular radiotelephone communication system, LTE cellular communication systems, metropolitan wireless local area communication systems (MWLAN) and the like.
  • WLAN wireless local area network
  • Types of cellular radiotelephone communication system intended to be within the scope of the present invention include, although are not limited to, Wideband Code Division Multiple Access (WCDMA), Global System for Mobile communication (GSM), General Packet Radio Service (GPRS), extended GPRS extended data rate for global evolution (EDGE), and the like.
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System for Mobile communication
  • GPRS General Packet Radio Service
  • EDGE extended GPRS extended data rate for global evolution
  • wireless communication system 100 in accordance with an exemplary embodiment of the invention is shown.
  • wireless communication system may include at least one base station (BS) 110 and mobile stations 120 and 140 , if desired.
  • BS base station
  • MS 120 and MS 140 may have a similar structure. Thus, only the structure and operation of one MS (e.g., MS 120 ) will be described in detail.
  • transmitter 130 may include an information (INFO) source 132 , a modulator (MOD) 134 , an encoder 136 and antennas 137 and 139 .
  • MS 140 may include a transmitter 141 and antennas 148 and 149 .
  • Transmitter 141 may include an information (INFO) source 142 , a modulator (MOD) 144 and an encoder 146 .
  • Base Station 110 may include a scheduler 112 and antennas 115 and 117 .
  • antennas 115 , 117 , 137 , 139 , 148 and 149 may include an internal antenna, a dipole antenna, an omni-directional antenna, a monopole antenna, an end fed antenna, a circularly polarized antenna, a micro-strip antenna, a diversity antenna and the like.
  • SDMA Space Division Multiple Access
  • scheduler 112 of BS 110 is able to select at least one of the users (e.g., MS 120 ) suitable for multiplexing. Furthermore, scheduler 112 may assign Time-Frequency resources and power control for the one or more selected user.
  • mobile stations 120 and 140 may transmit space time block codes for example, Alamouti space time block codes, according to a predetermined diversity scheme on substantially the same Time-Frequency resources and scheduler 112 may schedule the transmission of substantially the same Time-Frequency resources by both MS 120 and 140 , if desired.
  • space time block codes for example, Alamouti space time block codes
  • the transmitter is able to transmit at least two chains of data symbols to provide transmit diversity.
  • the data of the selected user may be encoded by Alamouti space time block code, if desired.
  • the Alamouti space time block code may be preformed over at least two transmit antennas of the at least one selected user (e.g., a mobile station).
  • the at least two Alamouti space time block code instances may be preformed in coupled data symbols in time and/or sub-carriers in frequency
  • the transmission of the Alamouti space time codes by antennas 137 and 139 of MS 120 may be done at approximately the same time.
  • Antenna 137 may transmit the Alamouti space time codes at a first frequency and antenna 139 may transmit the Alamouti space time codes at a second frequency.
  • the wireless communication system of claim 1 wherein at least one of the first and second mobile stations includes an antenna and the transmission of the space time codes is done using the antenna.
  • information source may include an application operated by a processor, if desired.
  • the application my generate data bits for transmission.
  • Modulator 134 may modulate the data bits, for example, according to Orthogonal Frequency Division Multiplexing (OFDM) scheme and/or according to a Single Carrier—Frequency Division Multiple Access (SC-FDMA) scheme or the like.
  • Encoder 136 may encode modulated symbols, for example Z 1 and Z 2 which may be two symbols that designated for Alamoti encoding by space time encoding scheme and/or by space frequency encoding scheme, if desired.
  • Encoder 146 of MS 140 may encode X 1 and X 2 which may be two symbols that designated for Alamoti encoding, if desired.
  • Antenna 137 may transmit via a channel 160 , which may be denoted as g 1.1, to antenna 115 of base station 110 and via channel 162 , which may be denoted as g 2.1, to antenna 117 of base station 110 .
  • Antenna 148 may transmit modulated symbols via a channel 168 , which may be denoted as h 1.1.
  • Antenna 149 may transmit modulated symbols via a channel 172 , which may be denoted as h 1.2 , to antenna 115 of base station 110 via channel 174 , which may be denoted as h 2.2, to antenna 117 of base station 110 .
  • BS 110 may receive a summation of the multiplexed MS 120 and MS 130 signals (passed through the channel media) as depicted in Equation 1.
  • BS 110 may perform Maximal Ratio Combining over the signals received by antennas 115 and 117 , followed by ‘Alamouti’ decoding scheme for the 2 multiplexed users (e.g., MS 120 , 140 ), as shown in Equation 2.
  • X 1 , X 2 may be the 2 symbols of User 1 (e.g., MS 120 ) designated for Alamouti encoding;
  • Z 1 , Z 2 may be the 2 symbols of User 2 (e.g., MS 140 ) designated for Alamouti encoding; and
  • r 1 j , r 2 j are the received signals at the j th antenna at the base, at the 1 st and 2 nd instances of the Alamouti encoding.
  • BS 110 decode the received signals according to Equation 3 which depicts the BS 110 receiver metric for decoding a subset of 2 symbols of 2 multiplexed users (e.g., MS 120 and MS 140 ) at each Alamouti block code interval.
  • Equation 4 depicts a representation of vectors of Equation 3.
  • Equation 5 depicts the metric of equation 3, as a linear system, for which a solution could be obtained in various known in the art ways.
  • LMMSE linear Minimum Mean Squared Error
  • Other embodiments of the invention may involve successive interference cancellation techniques or Zero-Forcing criteria, if desired.
  • R nn [ h 1 , 1 ′ h 2 , 1 ′ h 1 , 2 h 2 , 2 h 1 , 2 ′ h 2 , 2 ′ - h 1 , 1 ′ - h 2 , 1 ′ g 1 , 1 ′ g 2 , 1 ′ g 1 , 2 g 2 , 2 g 1 , 2 ′ g 2 , 2 ′ - g 1 , 1 ′ g 2 , 1 ′ ] * [ h 1 , 1 ′ h 2 , 1 ′ h 1 , 2 h 2 , 2 h 1 , 2 ′ h 2 , 2 ′ - h 1 , 1 ′ - h 2 , 1 ′ g 1 , 1 ′ g 2 , 1 ′ g 2 , 1 ′ g 2 , 1 ′ ] * [ h 1 , 1 ′ h 2 , 1 ′ h 1
  • a base station e.g., BS 110
  • the mobile station may transmit the first symbol at frequency 210 and the second symbol at frequency 220 .
  • frequencies 210 and 220 may be orthogonal frequencies and the mobile station may transmit the Alamouti time space code by using an orthogonal frequency-division multiplexing transmission scheme, if desired.
  • FIG. 3 a schematic time symbol/frequency slots diagram 300 of a multiplexing scheme in a Single Carrier—Frequency Division Multiple Access (SC-FDMA) according to an exemplary embodiment of the invention is shown.
  • a base station e g, BS 110
  • the transmission of the Alamouti space time codes using the antenna is done by transmitting a first symbol on sub-carrier frequency 310 and a second symbol at sub-carrier frequency 320 .
  • FIGS. 4 and 5 schematic diagrams of performance of the wireless communication system according to some exemplary embodiments of the invention is shown. Although the scope of the present invention is not limited in this respect, FIGS. 4 and 5 illustrate the potential simulated gains of the multiplexing scheme according to some embodiments of the invention, over diversity scheme and SDMA scheme, in both MMSE solution and Successive Interference Cancellation (SIC) technologies.
  • SIC Successive Interference Cancellation
  • FIG. 4 shows two rates of two multiplex user in MMSE and SIC and FIG. 5 shows the overall system rates as the sum of the rates of the two multiplexed users.
  • FIGS. 4 and 5 show that the present invention may obtain the diversity gains for individual links and may benefit the large system capacity due to the user multiplexing.
  • the results shown in FIGS. 4 and 5 are for uncorrelated single path channels.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
US11/529,726 2006-09-28 2006-09-28 Method and apparatus of system scheduler Abandoned US20080080434A1 (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
US11/529,726 US20080080434A1 (en) 2006-09-28 2006-09-28 Method and apparatus of system scheduler
BRPI0717567-1 BRPI0717567B1 (pt) 2006-09-28 2007-09-25 estação móvel configurado para operar em um sistema celular de evolução em longo prazo
KR1020097006161A KR101052368B1 (ko) 2006-09-28 2007-09-25 무선 통신 시스템에서의 통신 방법, 이동국 및 기지국
PCT/US2007/079465 WO2008039805A1 (en) 2006-09-28 2007-09-25 Method and apparatus of system scheduler
RU2009110752/09A RU2428793C2 (ru) 2006-09-28 2007-09-25 Система беспроводной связи, способ планирования ее ресурсов и подвижная станция
JP2009530563A JP5301445B2 (ja) 2006-09-28 2007-09-25 システムスケジューラの方法及び装置
EP07843180.6A EP2067277B1 (en) 2006-09-28 2007-09-25 Method and apparatus of system scheduler
CN2007800317895A CN101507138B (zh) 2006-09-28 2007-09-25 具有系统调度器的方法和装置
US12/612,875 US20100061348A1 (en) 2006-09-28 2009-11-05 Method and apparatus of system scheduler
US12/613,122 US8072941B2 (en) 2006-09-28 2009-11-05 Method and apparatus of system scheduler
US13/163,711 US8532065B2 (en) 2006-09-28 2011-06-19 Device, system and method of wireless communication utilizing OFDM, SC-FDMA and sub-carrier frequencies
JP2012050130A JP2012142981A (ja) 2006-09-28 2012-03-07 システムスケジューラの方法及び装置
US13/488,499 US8379602B2 (en) 2006-09-28 2012-06-05 Device, system and method of wireless communication
US13/492,877 US8379604B2 (en) 2006-09-28 2012-06-10 Device, system and method of wireless communication
US13/492,872 US8379603B2 (en) 2006-09-28 2012-06-10 Device, system and method of wireless communication

Applications Claiming Priority (1)

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US11/529,726 US20080080434A1 (en) 2006-09-28 2006-09-28 Method and apparatus of system scheduler

Related Child Applications (2)

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US12/613,122 Continuation US8072941B2 (en) 2006-09-28 2009-11-05 Method and apparatus of system scheduler
US12/612,875 Continuation US20100061348A1 (en) 2006-09-28 2009-11-05 Method and apparatus of system scheduler

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US20080080434A1 true US20080080434A1 (en) 2008-04-03

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US11/529,726 Abandoned US20080080434A1 (en) 2006-09-28 2006-09-28 Method and apparatus of system scheduler
US12/613,122 Active US8072941B2 (en) 2006-09-28 2009-11-05 Method and apparatus of system scheduler
US12/612,875 Abandoned US20100061348A1 (en) 2006-09-28 2009-11-05 Method and apparatus of system scheduler
US13/163,711 Active US8532065B2 (en) 2006-09-28 2011-06-19 Device, system and method of wireless communication utilizing OFDM, SC-FDMA and sub-carrier frequencies
US13/488,499 Active US8379602B2 (en) 2006-09-28 2012-06-05 Device, system and method of wireless communication
US13/492,877 Active US8379604B2 (en) 2006-09-28 2012-06-10 Device, system and method of wireless communication
US13/492,872 Active US8379603B2 (en) 2006-09-28 2012-06-10 Device, system and method of wireless communication

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US12/613,122 Active US8072941B2 (en) 2006-09-28 2009-11-05 Method and apparatus of system scheduler
US12/612,875 Abandoned US20100061348A1 (en) 2006-09-28 2009-11-05 Method and apparatus of system scheduler
US13/163,711 Active US8532065B2 (en) 2006-09-28 2011-06-19 Device, system and method of wireless communication utilizing OFDM, SC-FDMA and sub-carrier frequencies
US13/488,499 Active US8379602B2 (en) 2006-09-28 2012-06-05 Device, system and method of wireless communication
US13/492,877 Active US8379604B2 (en) 2006-09-28 2012-06-10 Device, system and method of wireless communication
US13/492,872 Active US8379603B2 (en) 2006-09-28 2012-06-10 Device, system and method of wireless communication

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US (7) US20080080434A1 (ja)
EP (1) EP2067277B1 (ja)
JP (2) JP5301445B2 (ja)
KR (1) KR101052368B1 (ja)
CN (1) CN101507138B (ja)
BR (1) BRPI0717567B1 (ja)
RU (1) RU2428793C2 (ja)
WO (1) WO2008039805A1 (ja)

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