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WO2008054381A1 - Procédé pour demander une connexion sur un canal dans des systèmes de communication sans fil - Google Patents

Procédé pour demander une connexion sur un canal dans des systèmes de communication sans fil Download PDF

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Publication number
WO2008054381A1
WO2008054381A1 PCT/US2006/042201 US2006042201W WO2008054381A1 WO 2008054381 A1 WO2008054381 A1 WO 2008054381A1 US 2006042201 W US2006042201 W US 2006042201W WO 2008054381 A1 WO2008054381 A1 WO 2008054381A1
Authority
WO
WIPO (PCT)
Prior art keywords
field
channel
preferredchannel
bit
message
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2006/042201
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English (en)
Inventor
Rajat Prakash
Fatih Ulupinar
Gavin Horn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to PCT/US2006/042201 priority Critical patent/WO2008054381A1/fr
Publication of WO2008054381A1 publication Critical patent/WO2008054381A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal where the received signal is a power saving command
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • 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
    • H04L27/2647—Arrangements specific to the receiver only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • 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
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present disclosure relates generally to wireless communications and more particularly to methods and apparatus for requesting a connection on a channel by generating and transmitting a PreferredChannelRequest message.
  • 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. As 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. [0004] 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.
  • CDM code division multiplexing
  • FDM frequency division multiplexing
  • TDM time division multiplexing
  • FDM orthogonal frequency division multiplexing
  • These subcarriers may also be referred to as tones, bins, and frequency channels.
  • 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, hi general, 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.
  • 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, hi these systems 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 requesting a connection on a channel, in a wireless communication system, the method comprising generating a PreferredChannelRequest message comprising an 8 bit MessageID field, an 8 bit Transaction ⁇ field wherein the TransactionID field indicates a value that is incremented for each new ConnectionRequest message sent, an 8 bit PreferredChannelCount field wherein the PreferredChannelCount field indicates the number of occurrences of the PreferredChannel field, and a PreferredChannel field having a length dependent on a ChannelRecord type, wherein the PreferredChannel field indicates the ChannelRecord specification for a channel on which Traffic Channel is preferred to be assigned and transmitting the PreferredChannelRequest message over an OFDM Communication link.
  • a computer readable medium having a first set of instructions for generating a PreferredChannelRequest message comprising an 8 bit MessageID field, an 8 bit TransactionID field wherein the TransactionID field indicates a value that is incremented for each new ConnectionRequest message sent, an 8 bit PreferredChannelCount field wherein the PreferredChannelCount field indicates the number of occurrences of the PreferredChannel field, and a PreferredChannel field having a length dependent on a ChannelRecord type, wherein the PreferredChannel field indicates the ChannelRecord specification for a channel on which Traffic Channel is preferred to be assigned and a second set of instructions for transmitting the PreferredChannelRequest over an OFDM Communication link.
  • an apparatus operable in a wireless communication system which includes means for generating a PreferredChannelRequest message comprising an 8 bit MessageID field, an 8 bit TransactionID field wherein the TransactionID field indicates a value that is incremented for each new ConnectionRequest message sent, an 8 bit PreferredChannelCount field wherein the PreferredChannelCount field indicates the number of occurrences of the PreferredChannel field, and a PreferredChannel field having a length dependent on a ChannelRecord type, wherein the PreferredChannel field indicates the ChannelRecord specification for a channel on which Traffic Channel is preferred to be assigned and means for transmitting the PreferredChannelRequest message over an OFDM Communication link.
  • 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 aspects of a multiple access wireless communication system
  • FIG. 2 illustrates aspects of a transmitter and receiver in a multiple access wireless communication system
  • FIGs. 3A and 3B illustrate aspects of superframe structures for a multiple access wireless communication system
  • FIG. 4 illustrates aspect of a communication between an access terminal and preferred channel
  • FIG 5A illustrates a flow diagram of a process by access terminal
  • FIG 5B illustrates one or more processor configured for requesting a connection on a channel 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 aspects, 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
  • a wireless communication device terminal, a mobile station or some other terminology.
  • 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.
  • FIG.2 a block diagram of an aspect of a transmitter system 210 and a receiver system 250 in a MIMO system 200 is illustrated.
  • traffic data for a number of data streams is provided from a data source 212 to transmit (TX) data processor 214.
  • 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) 222a through 222t.
  • 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 222a through 222t are then transmitted from N T antennas 224a through 224t, respectively.
  • the transmitted modulated signals are received by N R antennas 252a through 252r 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.
  • 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.
  • 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.
  • the CSI is then processed by a TX data processor 278, modulated by a modulator 280, conditioned by transmitters 254a through 254r, 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 transmission techniques described herein may be implemented by various means. For example, these techniques may be implemented in hardware, firmware, software, or a combination thereof.
  • 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, processor
  • the transmission techniques may be implemented with processors or 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, 272x or 272y in FIG. 2) and executed by a processor (e.g., processor 232, 27Ox or 27Oy).
  • the memory may be implemented within the processor or external to the processor.
  • channels 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. 3 A and 3B aspects of superframe structures for a multiple access wireless communication system are illustrated.
  • Fig. 3A illustrates aspects of superframe structures for a frequency division duplexed (FDD) multiple access wireless communication system
  • Fig. 3B illustrates aspects 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.
  • 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. [0042] As shown in Figs. 3A and 3B, the superframe preamble is followed by a sequence of frames.
  • 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 transmission of a PreferredChannelRequest message 410 by an access terminal 402 to request connection on a channel 404 that is different from the channel where the access preamble was sent.
  • the communication link 406 Using a communication link 406 and based upon predetermined timing, system conditions, or other decision criteria, the access terminal 402 requests connection on a channel 404.
  • 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), time division multiple access (TDMA), frequency division multiple access (FDMA), ortho
  • the access terminal 402 is configured to request connection on a channel using a PreferredChannelRequest message block.
  • the PreferredChannelRequest message block 410 comprises a MessageID value, a Transactionld value, a PreferredChannelCount value and a PreferredChannel field. In an aspect, 8 bits may be used for MessageID value, Transactionld value and PreferredChannelCount value. The length of PreferredChannel field depends on ChannelRecord type value.
  • the access terminal 402 may incorporate the PreferredChannelRequest message 410 into a data packet 412 and the data packet 412 is transmitted on a forward link 406. [0046]
  • the MessageID field is set to OxO3 by the access terminal (402).
  • the TransactionID indicates a value that is incremented every time a new Connection Request message is sent.
  • the Preferred Channel Count indicates the number of occurrences of the Preferred Channel field.
  • the Preferred Channel field will be set to Channel record specification for the channel in which access terminal prefers to be assigned a Traffic Channel.
  • Fig.5A illustrates a flow diagram of process 500, according at an aspect of the present invention.
  • a PreferredChannelRequest message is generated comprising an 8 bit MessageID field, an 8 bit TransactionID field wherein the TransactionID field indicates a value that is incremented for each new ConnectionRequest message sent, an 8 bit PreferredChannelCount field wherein the PreferredChannelCount field indicates the number of occurrences of the PreferredChannel field, and a PreferredChannel field having a length dependent on a ChannelRecord type, wherein the PreferredChannel field indicates the ChannelRecord specification for a channel on which Traffic Channel is preferred to be assigned.
  • the PreferredChannelRequest message is transmitted over an OFDM Communication link.
  • Fig. 5B illustrates a processor 550 for requesting a connection.
  • the processor referred to may be electronic devices and may comprise one or more processors configured to request a connection.
  • Processor 552 is configured to generate a PreferredChannelRequest message comprising an 8 bit MessageID field, an 8 bit TransactionID field wherein the TransactionID field indicates a value that is incremented for each new ConnectionRequest message sent, an 8 bit PreferredChannelCount field wherein the Pref erredChannelCount field indicates the number of occurrences of the PreferredChannel field, and a PreferredChannel field having a length dependent on a ChannelRecord type, wherein the PreferredChannel field indicates the ChannelRecord specification for a channel on which Traffic Channel is preferred to be assigned.
  • Processor 554 is configured to transmit the PreferredChannelRequest message over an OFDM Communication link.
  • the functionality of the discrete processors 552 to 554 depicted in the figure may be combined into a single processor 556.
  • a memory 558 is also coupled to the processor 556.
  • an apparatus which comprises means for generating a PreferredChannelRequest message comprising an 8 bit MessageID field, an 8 bit TransactionID field wherein the TransactionID field indicates a value that is incremented for each new ConnectionRequest message sent, an 8 bit PreferredChannelCount field wherein the PreferredChannelCount field indicates the number of occurrences of the PreferredChannel field, and a PreferredChannel field having a length dependent on a ChannelRecord type, wherein the PreferredChannel field indicates the ChannelRecord specification for a channel on which Traffic Channel is preferred to be assigned and means for transmitting the PreferredChannelRequest message over an OFDM Communication link.
  • the means described herein may comprise one or more processors.
  • embodiments may be implemented by hardware, software, firmware, middleware, microcode, or any combination thereof.
  • the program code or code segments to perform the necessary tasks may be stored in a machine readable medium such as a separate storage(s) not shown.
  • a processor may perform the necessary tasks.
  • a code segment may represent a procedure, a function, a subprogram, a program, a routine, a subroutine, a module, a software package, a class, or any combination of instructions, data structures, or program statements.
  • a code segment may be coupled to another code segment or a hardware circuit by passing and/or receiving information, data, arguments, parameters, or memory contents. Information, arguments, parameters, data, etc.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil pour demander une connexion sur un canal dans un système de communication sans fil. Un message de requête de canal préféré est généré, comprenant un champ ID de message à 8 bits, un champ ID de transaction à 8 bits, le champ ID de transaction indiquant une valeur qui est incrémentée pour chaque nouveau message de requête de connexion envoyé, un champ de décompte de canal préféré à 8 bits, le champ de décompte de canal préféré indiquant le nombre d'occurrences du champ de canal préféré, et un champ de canal préféré ayant une longueur dépendant d'un type d'enregistrement de canal, le champ de canal préféré indiquant la spécification d'enregistrement de canal pour un canal sur lequel il est préférable qu'un canal de trafic soit assigné. Le message de requête de canal préféré est transmis sur une liaison de communication OFDM.
PCT/US2006/042201 2006-10-30 2006-10-30 Procédé pour demander une connexion sur un canal dans des systèmes de communication sans fil Ceased WO2008054381A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2006/042201 WO2008054381A1 (fr) 2006-10-30 2006-10-30 Procédé pour demander une connexion sur un canal dans des systèmes de communication sans fil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2006/042201 WO2008054381A1 (fr) 2006-10-30 2006-10-30 Procédé pour demander une connexion sur un canal dans des systèmes de communication sans fil

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WO2008054381A1 true WO2008054381A1 (fr) 2008-05-08

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PCT/US2006/042201 Ceased WO2008054381A1 (fr) 2006-10-30 2006-10-30 Procédé pour demander une connexion sur un canal dans des systèmes de communication sans fil

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Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JIM TOMCIK, QUALCOM, INC.: "QFDD and QTDD: Proposed Draft Air Interface Specification (part), JIM TOMCIK, QUALCOM, IEEE 802.20 WORKING GROUP ON MOBILE BROADBAND WIRELESS ACCESS", IEEE 802.20 WORKING GROUP ON MOBILE BROADBAND WIRELESS ACCESS, 28 October 2005 (2005-10-28), pages 0,1-17,1-18,6-29,9-11,9-12, XP002422212 *

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