US20100150106A1 - Method and apparatus for managing assignment during handoff in wireless communication systems - Google Patents

Method and apparatus for managing assignment during handoff in wireless communication systems Download PDF

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Publication number
US20100150106A1
US20100150106A1 US12/529,159 US52915910A US2010150106A1 US 20100150106 A1 US20100150106 A1 US 20100150106A1 US 52915910 A US52915910 A US 52915910A US 2010150106 A1 US2010150106 A1 US 2010150106A1
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forward link
flss
flab
access terminal
dflss
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Gwendolyn D. Barriac
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Qualcomm Inc
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Qualcomm Inc
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Publication of US20100150106A1 publication Critical patent/US20100150106A1/en
Priority to US13/542,354 priority patent/US20130010755A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • 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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/16—Deriving transmission power values from another channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels
    • H04W52/325—Power control of control or pilot channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/48—TPC being performed in particular situations during retransmission after error or non-acknowledgment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
    • H04W52/58—Format of the TPC bits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks

Definitions

  • the present disclosure relates generally to wireless communications and more particularly to methods and apparatus for managing assignment during handoff.
  • Wireless communication systems have become a prevalent means by which a majority of people worldwide have come to communicate.
  • Wireless communication devices have become smaller and more powerful in order to meet consumer needs and to improve portability and convenience.
  • the increase in processing power in mobile devices such as cellular telephones has lead to an increase in demands on wireless network transmission systems.
  • Such systems typically are not as easily updated as the cellular devices that communicate there over.
  • mobile device capabilities expand, it can be difficult to maintain an older wireless network system in a manner that facilitates fully exploiting new and improved wireless device capabilities.
  • Wireless communication systems generally utilize different approaches to generate transmission resources in the form of channels. These systems may be code division multiplexing (CDM) systems, frequency division multiplexing (FDM) systems, and time division multiplexing (TDM) systems.
  • FDM code division multiplexing
  • FDM frequency division multiplexing
  • TDM time division multiplexing
  • One commonly utilized variant of FDM is orthogonal frequency division multiplexing (OFDM) that effectively partitions the overall system bandwidth into multiple orthogonal subcarriers.
  • OFDM orthogonal frequency division multiplexing
  • Each subcarrier can be modulated with data.
  • time division based techniques each subcarrier can comprise a portion of sequential time slices or time slots.
  • Each user may be provided with a one or more time slot and subcarrier combinations for transmitting and receiving information in a defined burst period or frame.
  • the hopping schemes may generally be a symbol rate hopping scheme or a block hopping scheme.
  • Code division based techniques typically transmit data over a number of frequencies available at any time in a range.
  • data is digitized and spread over available bandwidth, wherein multiple users can be overlaid on the channel and respective users can be assigned a unique sequence code.
  • Users can transmit in the same wide-band chunk of spectrum, wherein each user's signal is spread over the entire bandwidth by its respective unique spreading code.
  • This technique can provide for sharing, wherein one or more users can concurrently transmit and receive.
  • Such sharing can be achieved through spread spectrum digital modulation, wherein a user's stream of bits is encoded and spread across a very wide channel in a pseudo-random fashion.
  • the receiver is designed to recognize the associated unique sequence code and undo the randomization in order to collect the bits for a particular user in a coherent manner.
  • a typical wireless communication network includes one or more base stations that provide a coverage area and one or more mobile (e.g., wireless) terminals that can transmit and receive data within the coverage area.
  • a typical base station can simultaneously transmit multiple data streams for broadcast, multicast, and/or unicast services, wherein a data stream is a stream of data that can be of independent reception interest to a mobile terminal.
  • a mobile terminal within the coverage area of that base station can be interested in receiving one, more than one or all the data streams transmitted from the base station.
  • a mobile terminal can transmit data to the base station or another mobile terminal.
  • the bandwidth and other system resources are assigned utilizing a scheduler.
  • the signals, signal formats, signal exchanges, methods, processes, and techniques disclosed herein provide several advantages over known approaches. These include, for example, reduced signaling overhead, improved system throughput, increased signaling flexibility, reduced information processing, reduced transmission bandwidth, reduced bit processing, increased robustness, improved efficiency, and reduced transmission power.
  • a method for managing assignment during handoff in a wireless communication system, the method comprising determining if a forward link shared signaling (FLSS) Changed Indication is received from a RCC MAC protocol and clearing forward link access terminal assignments (FL-ATAs) associated with the FLSS.
  • FLSS forward link shared signaling
  • FL-ATAs forward link access terminal assignments
  • a computer readable medium having a first set of instructions for determining if a forward link shared signaling (FLSS) Changed Indication is received from a RCC MAC protocol and a second set of instructions for clearing forward link access terminal assignments (FL-ATAs) associated with the old FLSS.
  • FLSS forward link shared signaling
  • FL-ATAs forward link access terminal assignments
  • an apparatus operable in a wireless communication system which includes means for determining if a forward link shared signaling (FLSS) Changed Indication is received from a RCC MAC protocol and means for clearing forward link access terminal assignments (FL-ATAs) associated with the FLSS.
  • FLSS forward link shared signaling
  • FL-ATAs forward link access terminal assignments
  • a method for managing assignment during handoff in a wireless communication system, the method comprising determining if a forward link assignment block (FLAB)/non sticky forward link assignment block (NS-FLAB) comprising an access terminal's MACID and a supplement field set to ‘0’ is received from a dedicated forward shared signaling (DFLSS), issuing a ChangeFLSS command to change from a forward link shared signaling (FLSS) to a DFLSS, ignoring the FLABs or NS-FLABs coming from sectors other than the current FLSS or DFLSS, determining if a forward link shared signaling (FLSS) Changed Indication is received from a RCC MAC protocol and clearing forward link access terminal assignments (FL-ATAs) associated with the old FLSS and updating the appropriate FL-ATA/FL-NS-ATA according to the new FLAB/NS-FLAB.
  • FLAB forward link assignment block
  • N-FLAB non sticky forward link assignment block
  • a computer readable medium having a first set of instructions for determining if a forward link assignment block (FLAB) non sticky forward link assignment block (NS-FLAB) comprising an access terminal's MACID and a supplement field set to ‘0’ is received from a dedicated forward shared signaling (DFLSS), a second set of instructions for issuing a ChangeFLSS command to change from a forward link shared signaling (FLSS) to a DFLSS, a third set of instructions for ignoring the FLABs or NS-FLABs coming from sectors other than the current FLSS or DFLSS, a fourth set of instructions for determining if a forward link shared signaling (FLSS) Changed Indication is received from a RCC MAC protocol and a fifth set of instructions for clearing forward link access terminal assignments (FL-ATAs) associated with the old FLSS and updating the appropriate FL-ATA/FL-NS-ATA according to the new FLAB/NS-FLAB.
  • FLAB forward link assignment block
  • N-FLAB non sticky forward link assignment block
  • an apparatus which comprises a processor configured to determine if a forward link assignment block (FLAB)/non sticky forward link assignment block (NS-FLAB) comprising an access terminal's MACID and a supplement field set to ‘0’ is received from a dedicated forward shared signaling (DFLSS), the processor configured to issue a ChangeFLSS command to change from a forward link shared signaling (FLSS) to a DFLSS, the processor configured to ignore the FLABs or NS-FLABs coming from sectors other than the current FLSS or DFLSS, the processor configured to determine if a forward link shared signaling (FLSS) Changed Indication is received from a RCC MAC protocol, the processor configured to clear forward link access terminal assignments (FL-ATAs) associated with the old FLSS and update the appropriate FL-ATA/FL-NS-ATA according to the new FLAB/NS-FLAB and a memory coupled to the processor.
  • FLAB forward link assignment block
  • N-FLAB non sticky forward link assignment block
  • an apparatus operable in a wireless communication system which includes means for determining if a forward link assignment block (FLAB)/non sticky forward link assignment block (NS-FLAB) comprising an access terminal's MACID and a supplement field set to ‘0’ is received from a dedicated forward shared signaling (DFLSS), means for issuing a ChangeFLSS command to change from a forward link shared signaling (FLSS) to a DFLSS, means for ignoring the FLABs or NS-FLABs coming from sectors other than the current FLSS or DFLSS, means for determining if a forward link shared signaling (FLSS) Changed Indication is received from a RCC MAC protocol and means for clearing forward link access terminal assignments (FL-ATAs) associated with the old FLSS and updating the appropriate FL-ATA/FL-NS-ATA according to the new FLAB/NS-FLAB.
  • FLAB forward link assignment block
  • N-FLAB non sticky forward link assignment block
  • the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims.
  • the following description and the annexed drawings set forth in detail certain illustrative aspects of the one or more aspects. These aspects are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed and the described aspects are intended to include all such aspects and their equivalents.
  • FIG. 1 illustrates embodiments of a multiple access wireless communication system
  • FIG. 2 illustrates embodiments of a transmitter and receiver in a multiple access wireless communication system
  • FIGS. 3A and 3B illustrate embodiments of superframe structures for a multiple access wireless communication system
  • FIG. 4 illustrate embodiment of a communication between an access terminal and an access network
  • FIG. 5A illustrates a flow diagram of a process used by access terminal
  • FIG. 5B illustrates one or more processors configured for managing assignment during handoff in a wireless communication system
  • FIG. 6A illustrates a flow diagram of a process used by access terminal
  • FIG. 6B illustrates one or more processors configured for managing assignment during handoff in a wireless communication system.
  • a multiple access wireless communication system 100 includes multiple cells, e.g. cells 102 , 104 , and 106 .
  • each cell 102 , 104 , and 106 may include an access point 150 that includes multiple sectors.
  • the multiple sectors are formed by groups of antennas each responsible for communication with access terminals in a portion of the cell.
  • antenna groups 112 , 114 , and 116 each correspond to a different sector.
  • antenna groups 118 , 120 , and 122 each correspond to a different sector.
  • antenna groups 124 , 126 , and 128 each correspond to a different sector.
  • Each cell includes several access terminals which are in communication with one or more sectors of each access point.
  • access terminals 130 and 132 are in communication base 142
  • access terminals 134 and 136 are in communication with access point 144
  • access terminals 138 and 140 are in communication with access point 146 .
  • Controller 130 is coupled to each of the cells 102 , 104 , and 106 .
  • Controller 130 may contain one or more connections to multiple networks, e.g. the Internet, other packet based networks, or circuit switched voice networks that provide information to, and from, the access terminals in communication with the cells of the multiple access wireless communication system 100 .
  • the controller 130 includes, or is coupled with, a scheduler that schedules transmission from and to access terminals. In other embodiments, the scheduler may reside in each individual cell, each sector of a cell, or a combination thereof.
  • an access point may be a fixed station used for communicating with the terminals and may also be referred to as, and include some or all the functionality of, a base station, a Node B, or some other terminology.
  • An access terminal may also be referred to as, and include some or all the functionality of, a user equipment (UE), a wireless communication device, terminal, a mobile station or some other terminology.
  • UE user equipment
  • FIG. 1 depicts physical sectors, i.e. having different antenna groups for different sectors
  • FIG. 1 depicts physical sectors, i.e. having different antenna groups for different sectors
  • other approaches may be utilized. For example, utilizing multiple fixed “beams” that each cover different areas of the cell in frequency space may be utilized in lieu of, or in combination with physical sectors.
  • Such an approach is depicted and disclosed in copending U.S. patent application Ser. No. 11/260,895, entitled “Adaptive Sectorization In Cellular System.”
  • TX data processor 214 formats, codes, and interleaves the traffic data for each data stream based on a particular coding scheme selected for that data stream to provide coded data.
  • the coded data for each data stream may be multiplexed with pilot data using OFDM, or other orthogonalization or non-orthogonalization techniques.
  • the pilot data is typically a known data pattern that is processed in a known manner and may be used at the receiver system to estimate the channel response.
  • the multiplexed pilot and coded data for each data stream is then modulated (i.e., symbol mapped) based on one or more particular modulation schemes (e.g., BPSK, QSPK, M-PSK, or M-QAM) selected for that data stream to provide modulation symbols.
  • the data rate, coding, and modulation for each data stream may be determined by instructions performed on provided by processor 230 .
  • the modulation symbols for all data streams are then provided to a TX processor 220 , which may further process the modulation symbols (e.g., for OFDM).
  • TX processor 220 then provides N T modulation symbol streams to N T transmitters (TMTR) 222 a through 222 t .
  • TMTR N T transmitters
  • Each transmitter 222 receives and processes a respective symbol stream to provide one or more analog signals, and further conditions (e.g., amplifies, filters, and upconverts) the analog signals to provide a modulated signal suitable for transmission over the MIMO channel.
  • N T modulated signals from transmitters 222 a through 222 t are then transmitted from N T antennas 224 a through 224 t , respectively.
  • the transmitted modulated signals are received by N R antennas 252 a through 252 r and the received signal from each antenna 252 is provided to a respective receiver (RCVR) 254 .
  • Each receiver 254 conditions (e.g., filters, amplifies, and downconverts) a respective received signal, digitizes the conditioned signal to provide samples, and further processes the samples to provide a corresponding “received” symbol stream.
  • An RX data processor 260 then receives and processes the N R received symbol streams from N R receivers 254 based on a particular receiver processing technique to provide N T “detected” symbol streams.
  • the processing by RX data processor 260 is described in further detail below.
  • Each detected symbol stream includes symbols that are estimates of the modulation symbols transmitted for the corresponding data stream.
  • RX data processor 260 then demodulates, deinterleaves, and decodes each detected symbol stream to recover the traffic data for the data stream.
  • the processing by RX data processor 218 is complementary to that performed by TX processor 220 and TX data processor 214 at transmitter system 210 .
  • RX data processor 260 may be limited in the number of subcarriers that it may simultaneously demodulate, e.g. 512 subcarriers or 5 MHz, and such a receiver should be scheduled on a single carrier. This limitation may be a function of its FFT range, e.g. sample rates at which the processor 260 may operate, the memory available for or other functions available for demodulation. Further, the greater the number of subcarriers utilized, the greater the expense of the access terminal.
  • the channel response estimate generated by RX processor 260 may be used to perform space, space/time processing at the receiver, adjust power levels, change modulation rates or schemes, or other actions.
  • RX processor 260 may further estimate the signal-to-noise-and-interference ratios (SNRs) of the detected symbol streams, and possibly other channel characteristics, and provides these quantities to a processor 270 .
  • SNRs signal-to-noise-and-interference ratios
  • RX data processor 260 or processor 270 may further derive an estimate of the “operating” SNR for the system.
  • Processor 270 then provides channel state information (CSI), which may comprise various types of information regarding the communication link and/or the received data stream.
  • the CSI may comprise only the operating SNR.
  • the CSI may comprise a channel quality indicator (CQI), which may be a numerical value indicative of one or more channel conditions.
  • CQI channel quality indicator
  • the CSI is then processed by a TX data processor 278 , modulated by a modulator 280 , conditioned by transmitters 254 a through 254 r , and transmitted back to transmitter system 210 .
  • the modulated signals from receiver system 250 are received by antennas 224 , conditioned by receivers 222 , demodulated by a demodulator 240 , and processed by a RX data processor 242 to recover the CSI reported by the receiver system.
  • the reported CSI is then provided to processor 230 and used to (1) determine the data rates and coding and modulation schemes to be used for the data streams and (2) generate various controls for TX data processor 214 and TX processor 220 .
  • the CSI may be utilized by processor 270 to determine modulation schemes and/or coding rates for transmission, along with other information. This may then be provided to the transmitter which uses this information, which may be quantized, to provide later transmissions to the receiver.
  • Processors 230 and 270 direct the operation at the transmitter and receiver systems, respectively.
  • Memories 232 and 272 provide storage for program codes and data used by processors 230 and 270 , respectively.
  • receiver processing techniques may be used to process the N R received signals to detect the N T transmitted symbol streams.
  • These receiver processing techniques may be grouped into two primary categories (i) spatial and space-time receiver processing techniques (which are also referred to as equalization techniques); and (ii) “successive nulling/equalization and interference cancellation” receiver processing technique (which is also referred to as “successive interference cancellation” or “successive cancellation” receiver processing technique).
  • FIG. 2 discusses a MIMO system
  • the same system may be applied to a multi-input single-output system where multiple transmit antennas, e.g. those on a base station, transmit one or more symbol streams to a single antenna device, e.g. a mobile station.
  • a single output to single input antenna system may be utilized in the same manner as described with respect to FIG. 2 .
  • the processing units at a transmitter may be implemented within one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, electronic devices, other electronic units designed to perform the functions described herein, or a combination thereof.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • processors controllers, micro-controllers, microprocessors, electronic devices, other electronic units designed to perform the functions described herein, or a combination thereof.
  • the processing units at a receiver may also be implemented within one or more ASICs, DSPs, processors, and so on.
  • the transmission techniques may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein.
  • the software codes may be stored in a memory (e.g., memory 230 , 272 x or 272 y in FIG. 2 ) and executed by a processor (e.g., processor 232 , 270 x or 270 y ).
  • the memory may be implemented within the processor or external to the processor.
  • channels herein refers to information or transmission types that may be transmitted by the access point or access terminal. It does not require or utilize fixed or predetermined blocks of subcarriers, time periods, or other resources dedicated to such transmissions.
  • FIGS. 3A and 3B embodiments of superframe structures for a multiple access wireless communication system are illustrated.
  • FIG. 3A illustrates embodiments of superframe structures for a frequency division duplexed (FDD) multiple access wireless communication system
  • FIG. 3B illustrates embodiments of superframe structures for a time division duplexed (TDD) multiple access wireless communication system.
  • the superframe preamble may be transmitted separately for each carrier or may span all of the carriers of the sector.
  • the forward link transmission is divided into units of superframes.
  • a superframe may consist of a superframe preamble followed by a series of frames.
  • the reverse link and the forward link transmission may occupy different frequency bandwidths so that transmissions on the links do not, or for the most part do not, overlap on any frequency subcarriers.
  • N forward link frames and M reverse link frames define the number of sequential forward link and reverse link frames that may be continuously transmitted prior to allowing transmission of the opposite type of frame. It should be noted that the number of N and M may be vary within a given superframe or between superframes.
  • each superframe may comprise a superframe preamble.
  • the superframe preamble includes a pilot channel that includes pilots that may be used for channel estimation by access terminals, a broadcast channel that includes configuration information that the access terminal may utilize to demodulate the information contained in the forward link frame. Further acquisition information such as timing and other information sufficient for an access terminal to communicate on one of the carriers and basic power control or offset information may also be included in the superframe preamble. In other cases, only some of the above and/or other information may be included in this superframe preamble.
  • each frame may consist of a same or a different number of OFDM symbols, which may constitute a number of subcarriers that may simultaneously utilized for transmission over some defined period. Further, each frame may operate according to a symbol rate hopping mode, where one or more non-contiguous OFDM symbols are assigned to a user on a forward link or reverse link, or a block hopping mode, where users hop within a block of OFDM symbols. The actual blocks or OFDM symbols may or may not hop between frames.
  • FIG. 4 illustrates communication between an access terminal 402 and an access network 404 according to an embodiment.
  • the access network 404 will transmit information to the access terminal 402 .
  • the communication link may be implemented using communication protocols/standards such as World Interoperability for Microwave Access (WiMAX), infrared protocols such as Infrared Data Association (IrDA), short-range wireless protocols/technologies, Bluetooth® technology, ZigBee® protocol, ultra wide band (UWB) protocol, home radio frequency (HomeRF), shared wireless access protocol (SWAP), wideband technology such as a wireless Ethernet compatibility alliance (WECA), wireless fidelity alliance (Wi-Fi Alliance), 802.11 network technology, public switched telephone network technology, public heterogeneous communications network technology such as the Internet, private wireless communications network, land mobile radio network, code division multiple access (CDMA), wideband code division multiple access (WCDMA), universal mobile telecommunications system (UMTS), advanced mobile phone service (AMPS),
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • the access terminal 402 is configured to receive the information and the access network 404 is configured to transmit the information to the access terminal 402 using the communication link 406 .
  • the access terminal 402 receives information from the access network 404 for managing assignment during handoff.
  • the access terminal may clear all FL-ATAs associated with the old FLSS on receiving an FLSSChanged Indication from the RCC MAC protocol.
  • the access terminal 402 issues a ChangeFLSS command to change from the FLSS to a DFLSS upon receiving an FLAB/NS-FLAB having an access terminal's MACID and having the supplement field set to “0” from the DFLSS, while the DFLSS is different from the FLSS. Further, the access terminal 402 ignores all FLABs or NS-FLABS coming from sectors other than the current FLSS or DFLSS. The access terminal 402 further clears all FT-ATAs associated with the old FLSS and updates the appropriate FL-ATA/FL-NS-ATA according to the new FLAB/NS-FLAB upon reception of an FLSSChanged Indication from a RCC MAC protocol.
  • FIG. 5A illustrates a flow diagram of process 500 , according to an embodiment.
  • determining if a forward link shared signaling (FLSS) Changed Indication is received from a RCC MAC protocol and at 504 , forward link access terminal assignments (FL-ATAs) are cleared associated with the FLSS.
  • FLSS forward link shared signaling
  • FL-ATAs forward link access terminal assignments
  • FIG. 5B illustrates a processor 550 for managing assignment during handoff.
  • the processor referred to may be electronic devices and may comprise one or more processors configured for providing indices.
  • Processor 552 is configured to determine if a forward link shared signaling (FLSS) Changed Indication is received from a RCC MAC protocol and processor 554 is configured to clear forward link access terminal assignments (FL-ATAs) associated with the FLSS.
  • FLSS forward link shared signaling
  • FL-ATAs forward link access terminal assignments
  • an apparatus which comprises means for determining if a forward link shared signaling (FLSS) Changed Indication is received from a RCC MAC protocol and means for clearing forward link access terminal assignments (FL-ATAs) associated with the FLSS.
  • FLSS forward link shared signaling
  • the means described herein may comprise one or more processors.
  • FIG. 6A illustrates a flow diagram of process 600 , according to an embodiment.
  • determining if a forward link assignment block (FLAB)/non sticky forward link assignment block (NS-FLAB) comprising an access terminal's MACID and a supplement field set to ‘0’ is received from a dedicated forward shared signaling (DFLSS).
  • FLAB forward link assignment block
  • N-FLAB non sticky forward link assignment block
  • DFS dedicated forward shared signaling
  • a ChangeFLSS command is issued to change from a forward link shared signaling (FLSS) to a DFLSS, at 606 , the FLABs or NS-FLABs coming from sectors other than the current FLSS or DFLSS are ignored, at 608 , determining if a forward link shared signaling (FLSS) Changed Indication is received from a RCC MAC protocol and at 610 forward link access terminal assignments (FL-ATAs) associated with the old FLSS are cleared and the appropriate FL-ATA/FL-NS-ATA are updated according to the new FLAB/NS-FLAB.
  • FLSS forward link shared signaling
  • FL-ATAs forward link access terminal assignments
  • FIG. 6B illustrates a processor 650 for managing assignment during handoff.
  • the processor referred to may be electronic devices and may comprise one or more processors configured for managing assignment during handoff.
  • Processor 652 is configured to determine if a forward link assignment block (FLAB)/non sticky forward link assignment block (NS-FLAB) comprising an access terminal's MACID and a supplement field set to ‘0’ is received from a dedicated forward shared signaling (DFLSS).
  • Processor 654 is configured to issue a ChangeFLSS command to change from a forward link shared signaling (FLSS) to a DFLSS and processor 656 is configured to ignore the FLABs or NS-FLABs coming from sectors other than the current FLSS or DFLSS.
  • FLSS forward link shared signaling
  • Processor 658 is configured to determine if a forward link shared signaling (FLSS) Changed Indication is received from a RCC MAC protocol and processor 660 is configured to clear forward link access terminal assignments (FL-ATAs) associated with the old FLSS and update the appropriate FL-ATA/FL-NS-ATA according to the new FLAB/NS-FLAB.
  • FLSS forward link shared signaling
  • FL-ATAs forward link access terminal assignments
  • the functionality of the discrete processors 652 to 660 depicted in the figure may be combined into a single processor 662 .
  • a memory 664 is also coupled to the processor 662 .
  • an apparatus which comprises means for means for determining if a forward link assignment block (FLAB)/non sticky forward link assignment block (NS-FLAB) comprising an access terminal's MACID and a supplement field set to ‘0’ is received from a dedicated forward shared signaling (DFLSS), means for issuing a ChangeFLSS command to change from a forward link shared signaling (FLSS) to a DFLSS, means for ignoring the FLABs or NS-FLABs coming from sectors other than the current FLSS or DFLSS, means for determining if a forward link shared signaling (FLSS) Changed Indication is received from a RCC MAC protocol and means for clearing forward link access terminal assignments (FL-ATAs) associated with the old FLSS and updating the appropriate FL-ATA/FL-NS-ATA according to the new FLAB/NS-FLAB.
  • the means described herein may comprise one or more processors.

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  • Engineering & Computer Science (AREA)
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  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
  • Time-Division Multiplex Systems (AREA)
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  • Communication Control (AREA)
US12/529,159 2005-10-27 2006-10-27 Method and apparatus for managing assignment during handoff in wireless communication systems Abandoned US20100150106A1 (en)

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US13/542,354 US20130010755A1 (en) 2005-10-27 2012-07-05 Method and apparatus for managing assignment during handoff in wireless communication systems

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PCT/US2006/041981 WO2007050875A1 (en) 2005-10-27 2006-10-27 A method and apparatus for managing assignment during handoff in wireless communication systems
US12/529,159 US20100150106A1 (en) 2005-10-27 2006-10-27 Method and apparatus for managing assignment during handoff in wireless communication systems

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US12/091,475 Active 2030-06-14 US8971222B2 (en) 2005-10-27 2006-10-27 Method and apparatus for decrementing assignments in wireless communication systems
US12/091,500 Active 2028-11-26 US8199661B2 (en) 2005-10-27 2006-10-27 Method and apparatus for processing supplemental and non supplemental assignments
US12/091,513 Expired - Fee Related US8331285B2 (en) 2005-10-27 2006-10-27 Method and apparatus of establishing access channel in wireless communication systems
US12/091,482 Active 2026-12-24 US7924800B2 (en) 2005-10-27 2006-10-27 Method and apparatus for setting reverse link CQI reporting modes in wireless communication system
US12/091,480 Active 2027-01-24 US8520628B2 (en) 2005-10-27 2006-10-27 Method and apparatus for monitoring other channel interference in wireless communication system
US12/091,476 Active 2028-10-14 US8218479B2 (en) 2005-10-27 2006-10-27 Method and apparatus for processing a multi-code word assignment in wireless communication systems
US12/091,483 Active 2026-11-15 US7855976B2 (en) 2005-10-27 2006-10-27 Method and apparatus for reporting CQI in a wireless communication system
US12/091,477 Active 2028-10-16 US8411621B2 (en) 2005-10-27 2006-10-27 Method and apparatus of processing non-sticky assignments in wireless communication systems
US12/091,479 Active 2028-11-15 US8675549B2 (en) 2005-10-27 2006-10-27 Method of serving sector maintenance in a wireless communication systems
US12/091,507 Active 2031-12-12 US8923211B2 (en) 2005-10-27 2006-10-27 Method and apparatus of processing an access grant block in wireless communication systems
US12/091,511 Abandoned US20090305664A1 (en) 2005-10-27 2006-10-27 method and apparatus for attempting access in wireless communication systems
US12/091,510 Abandoned US20090156207A1 (en) 2005-10-27 2006-10-27 Method and apparatus of transmission of an access probe in a wireless communication systems
US12/529,159 Abandoned US20100150106A1 (en) 2005-10-27 2006-10-27 Method and apparatus for managing assignment during handoff in wireless communication systems
US12/091,502 Expired - Fee Related US8289908B2 (en) 2005-10-27 2006-10-27 Method and apparatus for processing simultaneous assignment in wireless communication systems
US13/082,136 Active US8599712B2 (en) 2005-10-27 2011-04-07 Method and apparatus for setting reverse link CQI reporting modes in wireless communication system
US13/542,354 Abandoned US20130010755A1 (en) 2005-10-27 2012-07-05 Method and apparatus for managing assignment during handoff in wireless communication systems
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US12/091,513 Expired - Fee Related US8331285B2 (en) 2005-10-27 2006-10-27 Method and apparatus of establishing access channel in wireless communication systems
US12/091,482 Active 2026-12-24 US7924800B2 (en) 2005-10-27 2006-10-27 Method and apparatus for setting reverse link CQI reporting modes in wireless communication system
US12/091,480 Active 2027-01-24 US8520628B2 (en) 2005-10-27 2006-10-27 Method and apparatus for monitoring other channel interference in wireless communication system
US12/091,476 Active 2028-10-14 US8218479B2 (en) 2005-10-27 2006-10-27 Method and apparatus for processing a multi-code word assignment in wireless communication systems
US12/091,483 Active 2026-11-15 US7855976B2 (en) 2005-10-27 2006-10-27 Method and apparatus for reporting CQI in a wireless communication system
US12/091,477 Active 2028-10-16 US8411621B2 (en) 2005-10-27 2006-10-27 Method and apparatus of processing non-sticky assignments in wireless communication systems
US12/091,479 Active 2028-11-15 US8675549B2 (en) 2005-10-27 2006-10-27 Method of serving sector maintenance in a wireless communication systems
US12/091,507 Active 2031-12-12 US8923211B2 (en) 2005-10-27 2006-10-27 Method and apparatus of processing an access grant block in wireless communication systems
US12/091,511 Abandoned US20090305664A1 (en) 2005-10-27 2006-10-27 method and apparatus for attempting access in wireless communication systems
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US13/542,354 Abandoned US20130010755A1 (en) 2005-10-27 2012-07-05 Method and apparatus for managing assignment during handoff in wireless communication systems
US14/033,322 Active US9125078B2 (en) 2005-10-27 2013-09-20 Method and apparatus for setting reverse link CQI reporting modes in wireless communication system

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