US20150289288A1 - System and method for transmitting random access data using orthogonal frequency division multiple access - Google Patents

System and method for transmitting random access data using orthogonal frequency division multiple access Download PDF

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US20150289288A1
US20150289288A1 US14/685,071 US201514685071A US2015289288A1 US 20150289288 A1 US20150289288 A1 US 20150289288A1 US 201514685071 A US201514685071 A US 201514685071A US 2015289288 A1 US2015289288 A1 US 2015289288A1
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preamble
random access
mobile station
scheduling
data
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US20160295608A9 (en
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Soo Jung JUNG
Kwang Soon Kim
Byung Han RYU
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Electronics and Telecommunications Research Institute ETRI
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Electronics and Telecommunications Research Institute ETRI
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04W72/1294—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/0026—Interference mitigation or co-ordination of multi-user interference
    • 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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • 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
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/023—Multiplexing of multicarrier modulation signals
    • H04W72/048—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • 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
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to a system and method for transmitting random access data using OFDMA (orthogonal frequency division multiple access.) More specifically, the present invention relates to a system and method for transmitting random access data using OFDMA for allowing a plurality of mobile stations to transmit burst-characterized data through an uplink common channel for the purpose of effective usage of resources.
  • OFDMA orthogonal frequency division multiple access
  • a wireless mobile communication system divides a total resource such as frequency bands or data rates into many smaller ones, schedules them according to respective users' requests, and thus shares the resource by using multiple access methods such as time division, frequency division, and code division.
  • the method for a plurality of mobile stations to transmit intermittent data through an uplink common channel for the purpose of effective usage of resources is a random access method for allowing all the mobile stations to have transmission rights and transmit data randomly.
  • One of the random access methods is to allow a mobile station to transmit a preamble to a base station in advance.
  • the preamble is generated by using a randomly selected code from among distinguishable codes. After having received a corresponding access grant on the preamble from the base station, the mobile station transmit the actual random access data.
  • the above-noted method for transmitting random access data allows the preamble and the data to be transmitted through a common random access channel, and additionally requires resource assignment.
  • one of methods for responding to the preamble transmitted from the mobile station is to use the code which is received when an access grant signal is generated, and re-transmit the preamble. Another one is to use code and channel information which is captured at the time of receiving the preamble.
  • a random access data transmission system using OFDMA between a mobile station and a base station wherein the mobile station comprises: a resource selector for randomly is selecting a preamble transmission channel and a code; a preamble transmitter for generating a preamble based on the transmission resource information selected by the resource selector and transmitting the preamble to the base station through a preamble transmission channel; a preamble access grant processor for receiving and processing acknowledgment or non-acknowledgment information including a scheduling ID contained in the preamble access grant from the base station; and a data transmitter for transmitting random access data through a data transmission channel assigned to the mobile station based on the information processed by the preamble access grant processor.
  • a random access data transmission system using OFDMA orthogonal frequency division multiple access
  • the base station comprises: a preamble receiving processor for receiving a preamble from the mobile station and extracting corresponding preamble information; an ID manager for assigning a specific scheduling ID to each mobile station and managing the specific scheduling ID so that the mobile station may use a assigned data transmit channel; a scheduler for scheduling a data transmission time, and a transmission quantity of the mobile station with the scheduling ID assigned to the mobile station by the ID manager according to channel environments and requirements of the mobile stations; an access grant processor for determining an acknowledgment/non-acknowledgment status based on the preamble information of the preamble receiving processor and the is scheduling ID of the ID manager, and transmitting preamble access grant configuring information including the scheduling ID to the mobile station; and a data receiving processor for receiving the random access data through a assigned data transmission channel from the mobile station according to a transmission result of the access grant processor
  • the ID manager recovers the scheduling ID assigned to the mobile station when the data receiving processor finishes receiving of transmitted random access data.
  • a random access data transmission method using OFDMA between a mobile station and a base station comprises: (a) selecting a preamble transmission channel and a transmission radio resource related to a code used for transmitting a preamble for a random access to the base station; (b) generating a preamble and transmitting the preamble to the base station using the transmission radio resource selected in (a); (c) receiving preamble access grant configuring information including a scheduling ID and acknowledgment/non-acknowledgment information assigned by the base station with respect to the preamble transmitted in (b), and checking a success or failure in transmission of the preamble, and the scheduling ID; and (d) allowing the mobile station to check an assignment of the data transmission channel by using the mobile station's scheduling ID included in a control channel according to a checking result in (c), and transmitting random access data to the base station through the data transmission channel assigned to the mobile station.
  • step (d) the mobile station uses extracted transmission control information related to timing, a frequency, and power from the access grant information received in (c) to transmit random access data.
  • a random access data transmission method using OFDMA between a mobile station and a base station wherein the procedure of base station comprises: (a) allowing the base station to receive and analyze a preamble transmitted from the mobile station, and assigning a specific scheduling ID when the mobile station can be scheduled; (b) determining an acknowledgment or a non-acknowledgment and forming preamble access grant configuring information according to the preamble information analyzed in (a) and an assigned status of the scheduling ID, and transmitting the preamble access grant configuring information to the mobile station; (c) allowing the base station to schedule a data transmission time, a transmission channel, and a transmission quantity of each mobile station according to the mobile stations' channel environments and requirements, and notifying the mobile station of scheduled results by using scheduling ID; and (d) receiving random access data from the mobile station corresponding to the scheduling ID determined in (c) through the data transmission channel, and processing the random access data.
  • the step (d) comprises recovering the scheduling ID assigned to the mobile station when the reception of the random access data transmitted from the mobile station is finished.
  • FIG. 1 shows a configuration diagram of a random access data transmission system using OFDMA according to a preferred embodiment of the present invention
  • FIG. 2 shows a configuration of an uplink frame according to a preferred embodiment of the present invention
  • FIG. 3 shows a configuration of a downlink frame according to a preferred embodiment of the present invention.
  • FIG. 4 shows a data transmission process of the random access data transmission method using OFDMA according to a preferred embodiment of the present invention.
  • FIG. 1 shows a configuration diagram of a random access data transmission system using OFDMA according to a preferred embodiment of the present invention
  • FIG. 2 shows a configuration of an uplink frame according to a preferred embodiment of the present invention
  • FIG. 3 shows a configuration of a downlink frame according to a preferred embodiment of the present invention.
  • the random access data transmission system using OFDMA assigns a scheduling ID included in downlink access grant transmitted by the base station 200 to the uplink preamble transmitted by the mobile station 100 so that the mobile station may transmit the random access data to the base station 200 through a data transmission channel assigned to the scheduling ID.
  • the mobile station 100 comprises a resource selector 110 , a preamble transmitter 120 , a preamble access grant receiving processor 130 , and a data transmitter.
  • the resource selector 110 selects transmission radio resources like codes, preamble transmission channel for transmitting the preamble for a is random access to the base station codes.
  • the preamble transmitter 120 generates a preamble by using information on the transmission radio resource selected by the resource selector 110 , and transmits the corresponding preamble to the base station through the preamble transmission channel.
  • the preamble transmitter 120 fixes a specific slot in an uplink frame for an available time of preamble transmission.
  • An uplink frame is made up a plurality of slots. Radio frequency resources of the specific slot are divided into a plurality of sub-channels.
  • the preamble transmitter 120 transmits the preamble which is generated by using the code which is distinguishable from among the different codes through the subchannel randomly selected from among the subchannels.
  • slots of the uplink frame except the slot which is fixed for transmitting the preamble are divided into control information transmission channels and data transmission channels, and the random access data are loaded on part of the data transmission channel and transmitted to the base station 200 .
  • the uplink frame having a predetermined length of T frame comprises a plurality of slots where the length of the slots is T slot , excluding the final slot having a length of T slot′ .
  • the possibility of each slot's transmission of the random access preamble is determined according to the position of the slot in the frame.
  • the preamble transmission position is defined to be the final slot within the is frame
  • the final slot of the frame is fixed to the time for transmitting the preamble, and the radio resources of the slots are divided into subchannels and are then used.
  • the mobile station 100 randomly selects one of the radio resources which are divided as the subchannels at the time of transmitting the preamble, uses the code which is distinguishable by different codes, and transmits the generated preamble to the base station 200 .
  • the slots except the final slot are divided into control information transmission channels and data transmission channels.
  • a channel for transmitting the random access data is not classified as a separate transmission channel, and the random access data are transmitted by using part of the data transmission channels.
  • the preamble access grant receiving processor 130 receives a preamble access grant including a scheduling ID and ACK/NACK information on the preamble from the base station 200 according to the transmission by the preamble transmitter 120 , and processes them.
  • the data transmitter 140 transmits the random access data to the base station 200 through the data transmission channel of the scheduling ID assigned to the mobile station 100 based on the information processed by the preamble access grant receiving processor 130 .
  • the base station 200 comprises a preamble receiving processor 210 , an ID manager 220 , a scheduler 230 , an access grant processor 240 , and a data receiving processor 250 .
  • the preamble receiving processor 210 receives preambles from the is respective mobile stations 100 , and extracts preamble information including codes, timing, and power through the preambles.
  • the ID manager 220 assigns a specific scheduling ID to each mobile station 100 and manages it so that the mobile station 100 may use a data transmission channel specified by the base station 200 , and also recovers and manages the scheduling ID assigned to the mobile station when the data receiving processor 250 finishes receiving of transmitted random access data.
  • the scheduler 230 assigns the resources of the packet service, and in detail, it considers requirements including a channel environment and QoS of the mobile stations, and determines transmission times and quantities of the mobile stations to which the scheduling IDs are given according to a scheduling algorithm.
  • the access grant processor 240 loads preamble access grant information in a specific slot of the downlink frame including a plurality of slots, and transmits the same to the mobile station 100 .
  • the downlink frame includes a plurality of slots having a constant length T frame , and it has the same length as that of the uplink frame.
  • the slots of the downlink frame comprises a slot T slot′ for synchronization and cell search, and downlink traffic slots T slot which include a transmission time of data traffic and a transmission time of control signal traffic.
  • the period of physical channels for transmitting the control signal traffic can be a multiple of the frame period, which represents that the data configured by block units are partially divided and transmitted for each slot.
  • the data transmitted to the downlink through the channel at the transmission time of the control signal traffic include broadcasting information, paging information, state management information, and data transmission control information.
  • a preamble access grant channel for transmitting access grants on the preamble transmission can be configured with N subchannels from among the channel.
  • the base station may separately notify the mobile station of configuration information of a preamble access grant channel, use the configuration information of the preamble access grant channel, and allow the mobile station to check the preamble acknowledgements ACK/NACK so that the base station may effectively manage the channel for transmitting the access grant of the preamble, compared to the method for fixing part of the control signal information channel to be a preamble access grant channel in consideration of the maximum value of the random access request available in the existing cell.
  • the data receiving processor 250 receives and processes the random access data transmitted by the mobile station 100 which has received the access grant of the access grant processor 240 .
  • FIG. 4 shows a data transmission process of the random access data transmission method using OFDMA according to the preferred embodiment of the present invention.
  • the resource selector 110 of the mobile station 100 initially selects a transmission radio resource used for transmitting the preamble in step S 1 .
  • the preamble transmitter 120 receives information on the transmission radio resource selected by the resource selector 110 , generates a preamble, and transmits it to the base station 200 through a preamble transmission channel in step S 2 .
  • the preamble receiving processor 210 of the base station 200 analyzes the preamble received through the preamble transmitter 120 , extracts preamble information including codes, timing, and power, and the ID manager 220 assigns a scheduling ID to the mobile station to be scheduled in step S 3 .
  • the access grant processor 240 determines acknowledgment/non-acknowledgment status on the preamble provided from the mobile station according to the preamble information extracted from the preamble receiving processor 210 and assigned status of the scheduling ID provided by the ID manager 220 .
  • the access grant processor 240 configures preamble access grant configuring information by using the scheduling ID information, ACK/NACK information, and preamble information extracted from the preamble, and transmits the preamble access grant configuring information which is access grant information to the mobile station 100 through the control information transmission channel specified by the base station 200 in step S 4 .
  • the preamble access grant receiving processor 130 of the mobile station 100 receives the preamble access grant configuring information from the access grant processor 240 through the preamble acknowledgement channel, and checks successful preamble transmission status and the scheduling ID in step S 5 .
  • the base station 200 When finishing transmission of the preamble access grant configuring information, the base station 200 transmits assignment information of the data transmission channel determined after scheduling together with the scheduling ID assigned to a random access mobile station 100 by the scheduler 230 to the mobile station 100 through the control information transmission channel in steps S 6 and S 7 .
  • the random access mobile station 100 checks assigned status of the data transmission channel of the scheduling ID transmitted through the control channel in step S 8 , and transmits the random access data through the data transmission channel assigned to the mobile station 100 in step S 9 .
  • the mobile station 100 minimizes the influence given to the data transmitted to the base station by another mobile station by using transmission control information including timing, a frequency, and a power received through the preamble access grant configuring information, and transmits the random access data through the data transmission channel.
  • the ID manager 220 recovers and manages the scheduling ID assigned to the corresponding mobile station in step S 10 .
  • the base station 200 assigns data transmission channels for variably transmitting the random access data according to assigned resource status to the access grant of the preamble transmitted from the mobile station.
  • the base station 200 provides a specific scheduling ID for each preamble when transmitting an access grant on the preamble received from the mobile station to the downlink, and notifies the mobile station of assignment information on the data transmission channel determined through the scheduling ID.
  • the scheduling ID is desirable to use as an identifier of the mobile station used by the scheduler 230 and use the same for the physical layer and the MAC layer.
  • the scheduler 230 selects a mobile station to which the data transmission channel will be assigned, and transmits corresponding assignment information through the data transmission control channel, and hence, the mobile station checks the assignment information in the data transmission control channel through the scheduling ID assigned to the mobile station, and transmits the random access data through the data transmission channel.
  • the data transmission channel is a channel for allowing is the mobile station which is registered to the base station and is in the active state to transmit the data.
  • the base station 200 After receiving the random access data from the mobile station, the base station 200 transmits them to the system through a path other than that of the data of the registered mobile station. Therefore, the OFDMA-based random access data transmission system and method according to the preferred embodiment improves conventional inefficient usage of the transmission resources through assigning a separate random access data transmission channel.
  • the base station loads the mobile station's transmission control information and the scheduling ID information into the access grant of the preamble received from the mobile station and transmits them so that the mobile station may transmit the random access data through the data transmission channel without an additional separated channel, thereby enabling effective usage of the radio resources, and transmitting the data without influencing data transmission of other mobile stations by using the transmission control information.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Disclosed is a random access data transmission system and method using OFDMA. The system includes a scheduling ID into an access grant on a preamble for a random access, and transmits it together with an acknowledgment or a non-acknowledgment of the preamble, a base station uses the scheduling ID to notify the mobile station of a random access data transmittable time and a data transmission channel through a control channel, and the mobile station transmits a preamble in advance. After receiving a transmission assignment instruction corresponding to a scheduling ID through the control channel, the mobile station transmits random access data through an assigned channel.

Description

    CROSS REFERENCE TO RELATED APPLICATION
  • This application is a continuation of U.S. patent Reissue application Ser. No. 13/422,300, filed on Mar. 16, 2012, of U.S. Pat. No. 7,680,156 issued on Mar. 16, 2010, which claims the benefit under 35 U.S.C. §365 of International Application PCT/KR2004/002279, filed Sep. 8, 2004, which designated the United States and was published in English, which claims priority to Korean Patent Application No. 10-2003-0090149, filed on Dec. 11, 2003. These applications, in its entirety, are incorporated herein by reference.
    • BACKGROUND OF THE INVENTION
  • (a) Field of the Invention
  • The present invention relates to a system and method for transmitting random access data using OFDMA (orthogonal frequency division multiple access.) More specifically, the present invention relates to a system and method for transmitting random access data using OFDMA for allowing a plurality of mobile stations to transmit burst-characterized data through an uplink common channel for the purpose of effective usage of resources.
  • (b) Description of the Related Art
  • A wireless mobile communication system divides a total resource such as frequency bands or data rates into many smaller ones, schedules them according to respective users' requests, and thus shares the resource by using multiple access methods such as time division, frequency division, and code division.
  • The method for a plurality of mobile stations to transmit intermittent data through an uplink common channel for the purpose of effective usage of resources is a random access method for allowing all the mobile stations to have transmission rights and transmit data randomly.
  • One of the random access methods is to allow a mobile station to transmit a preamble to a base station in advance. The preamble is generated by using a randomly selected code from among distinguishable codes. After having received a corresponding access grant on the preamble from the base station, the mobile station transmit the actual random access data.
  • The above-noted method for transmitting random access data allows the preamble and the data to be transmitted through a common random access channel, and additionally requires resource assignment.
  • Further, one of methods for responding to the preamble transmitted from the mobile station is to use the code which is received when an access grant signal is generated, and re-transmit the preamble. Another one is to use code and channel information which is captured at the time of receiving the preamble.
  • Since a lesser amount of resources is needed for transmitting the preamble, it is allowable to assign a lesser amount of resources irrespective of a random access request by the mobile station. However, it is inefficient to assign the transmission resource for transmission of random access data irrespective of a random access request by the mobile station.
    • SUMMARY OF THE INVENTION
  • It is an advantage of the present invention to transmit ACK/NACK information including a scheduling ID when a base station responds to a preamble of a random access mobile station.
  • It is another advantage of the present invention to provide a system and method for transmitting random access data using OFDMA for allowing a base station to assign a specific ID to each preamble when receiving the preamble, variably assign a channel for transmitting random access data according to resource assigned conditions, and notify a mobile station of assignment of the channel resource by using ID.
  • In one aspect of the present invention, provided is a random access data transmission system using OFDMA between a mobile station and a base station, wherein the mobile station comprises: a resource selector for randomly is selecting a preamble transmission channel and a code; a preamble transmitter for generating a preamble based on the transmission resource information selected by the resource selector and transmitting the preamble to the base station through a preamble transmission channel; a preamble access grant processor for receiving and processing acknowledgment or non-acknowledgment information including a scheduling ID contained in the preamble access grant from the base station; and a data transmitter for transmitting random access data through a data transmission channel assigned to the mobile station based on the information processed by the preamble access grant processor.
  • In another aspect of the present invention, provided is a random access data transmission system using OFDMA (orthogonal frequency division multiple access) between a mobile station and a base station wherein the base station comprises: a preamble receiving processor for receiving a preamble from the mobile station and extracting corresponding preamble information; an ID manager for assigning a specific scheduling ID to each mobile station and managing the specific scheduling ID so that the mobile station may use a assigned data transmit channel; a scheduler for scheduling a data transmission time, and a transmission quantity of the mobile station with the scheduling ID assigned to the mobile station by the ID manager according to channel environments and requirements of the mobile stations; an access grant processor for determining an acknowledgment/non-acknowledgment status based on the preamble information of the preamble receiving processor and the is scheduling ID of the ID manager, and transmitting preamble access grant configuring information including the scheduling ID to the mobile station; and a data receiving processor for receiving the random access data through a assigned data transmission channel from the mobile station according to a transmission result of the access grant processor, and processing them.
  • The ID manager recovers the scheduling ID assigned to the mobile station when the data receiving processor finishes receiving of transmitted random access data.
  • In still another aspect of the present invention, provided is a random access data transmission method using OFDMA between a mobile station and a base station, wherein the procedure of mobile station comprises: (a) selecting a preamble transmission channel and a transmission radio resource related to a code used for transmitting a preamble for a random access to the base station; (b) generating a preamble and transmitting the preamble to the base station using the transmission radio resource selected in (a); (c) receiving preamble access grant configuring information including a scheduling ID and acknowledgment/non-acknowledgment information assigned by the base station with respect to the preamble transmitted in (b), and checking a success or failure in transmission of the preamble, and the scheduling ID; and (d) allowing the mobile station to check an assignment of the data transmission channel by using the mobile station's scheduling ID included in a control channel according to a checking result in (c), and transmitting random access data to the base station through the data transmission channel assigned to the mobile station.
  • In step (d), the mobile station uses extracted transmission control information related to timing, a frequency, and power from the access grant information received in (c) to transmit random access data.
  • In still yet another aspect of the present invention, provided is a random access data transmission method using OFDMA between a mobile station and a base station, wherein the procedure of base station comprises: (a) allowing the base station to receive and analyze a preamble transmitted from the mobile station, and assigning a specific scheduling ID when the mobile station can be scheduled; (b) determining an acknowledgment or a non-acknowledgment and forming preamble access grant configuring information according to the preamble information analyzed in (a) and an assigned status of the scheduling ID, and transmitting the preamble access grant configuring information to the mobile station; (c) allowing the base station to schedule a data transmission time, a transmission channel, and a transmission quantity of each mobile station according to the mobile stations' channel environments and requirements, and notifying the mobile station of scheduled results by using scheduling ID; and (d) receiving random access data from the mobile station corresponding to the scheduling ID determined in (c) through the data transmission channel, and processing the random access data.
  • The step (d) comprises recovering the scheduling ID assigned to the mobile station when the reception of the random access data transmitted from the mobile station is finished.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate an embodiment of the invention, and, together with the description, serve to explain the principles of the invention:
  • FIG. 1 shows a configuration diagram of a random access data transmission system using OFDMA according to a preferred embodiment of the present invention;
  • FIG. 2 shows a configuration of an uplink frame according to a preferred embodiment of the present invention;
  • FIG. 3 shows a configuration of a downlink frame according to a preferred embodiment of the present invention; and
  • FIG. 4 shows a data transmission process of the random access data transmission method using OFDMA according to a preferred embodiment of the present invention.
    •  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • In the following detailed description, only the preferred embodiment of the invention has been shown and described, simply by way of illustration of the best mode contemplated by the inventor(s) of carrying out the invention. As will be realized, the invention is capable of modification in various obvious respects, all without departing from the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not restrictive. To clarify the present invention, parts which are not described in the specification are omitted.
  • A random access data transmission system using OFDMA according to the preferred embodiment of the present invention will be described in detail with reference to FIG. 1.
  • FIG. 1 shows a configuration diagram of a random access data transmission system using OFDMA according to a preferred embodiment of the present invention, FIG. 2 shows a configuration of an uplink frame according to a preferred embodiment of the present invention, and FIG. 3 shows a configuration of a downlink frame according to a preferred embodiment of the present invention.
  • As shown in FIG. 1, when using the random access method including the case in which a mobile station registers to a cell for the first time, the case in which the mobile station requests a state transition, and the case in which the mobile station requests a handover from one cell to another, the random access data transmission system using OFDMA assigns a scheduling ID included in downlink access grant transmitted by the base station 200 to the uplink preamble transmitted by the mobile station 100 so that the mobile station may transmit the random access data to the base station 200 through a data transmission channel assigned to the scheduling ID.
  • For this purpose, the mobile station 100 comprises a resource selector 110, a preamble transmitter 120, a preamble access grant receiving processor 130, and a data transmitter.
  • The resource selector 110 selects transmission radio resources like codes, preamble transmission channel for transmitting the preamble for a is random access to the base station codes.
  • The preamble transmitter 120 generates a preamble by using information on the transmission radio resource selected by the resource selector 110, and transmits the corresponding preamble to the base station through the preamble transmission channel.
  • In the OFDMA/FDD system which uses different frequency bands for uplinks and downlinks, the preamble transmitter 120 fixes a specific slot in an uplink frame for an available time of preamble transmission. An uplink frame is made up a plurality of slots. Radio frequency resources of the specific slot are divided into a plurality of sub-channels. The preamble transmitter 120 transmits the preamble which is generated by using the code which is distinguishable from among the different codes through the subchannel randomly selected from among the subchannels.
  • In this instance, slots of the uplink frame except the slot which is fixed for transmitting the preamble are divided into control information transmission channels and data transmission channels, and the random access data are loaded on part of the data transmission channel and transmitted to the base station 200.
  • As shown in FIG. 2, the uplink frame having a predetermined length of Tframe comprises a plurality of slots where the length of the slots is Tslot, excluding the final slot having a length of Tslot′.
  • The possibility of each slot's transmission of the random access preamble is determined according to the position of the slot in the frame. When the preamble transmission position is defined to be the final slot within the is frame, the final slot of the frame is fixed to the time for transmitting the preamble, and the radio resources of the slots are divided into subchannels and are then used.
  • The mobile station 100 randomly selects one of the radio resources which are divided as the subchannels at the time of transmitting the preamble, uses the code which is distinguishable by different codes, and transmits the generated preamble to the base station 200.
  • The slots except the final slot are divided into control information transmission channels and data transmission channels. A channel for transmitting the random access data is not classified as a separate transmission channel, and the random access data are transmitted by using part of the data transmission channels.
  • The preamble access grant receiving processor 130 receives a preamble access grant including a scheduling ID and ACK/NACK information on the preamble from the base station 200 according to the transmission by the preamble transmitter 120, and processes them.
  • The data transmitter 140 transmits the random access data to the base station 200 through the data transmission channel of the scheduling ID assigned to the mobile station 100 based on the information processed by the preamble access grant receiving processor 130.
  • The base station 200 comprises a preamble receiving processor 210, an ID manager 220, a scheduler 230, an access grant processor 240, and a data receiving processor 250.
  • The preamble receiving processor 210 receives preambles from the is respective mobile stations 100, and extracts preamble information including codes, timing, and power through the preambles.
  • The ID manager 220 assigns a specific scheduling ID to each mobile station 100 and manages it so that the mobile station 100 may use a data transmission channel specified by the base station 200, and also recovers and manages the scheduling ID assigned to the mobile station when the data receiving processor 250 finishes receiving of transmitted random access data.
  • The scheduler 230 assigns the resources of the packet service, and in detail, it considers requirements including a channel environment and QoS of the mobile stations, and determines transmission times and quantities of the mobile stations to which the scheduling IDs are given according to a scheduling algorithm.
  • The access grant processor 240 loads preamble access grant information in a specific slot of the downlink frame including a plurality of slots, and transmits the same to the mobile station 100.
  • As shown in FIG. 3, the downlink frame includes a plurality of slots having a constant length Tframe, and it has the same length as that of the uplink frame.
  • The slots of the downlink frame comprises a slot Tslot′for synchronization and cell search, and downlink traffic slots Tslot which include a transmission time of data traffic and a transmission time of control signal traffic.
  • The period of physical channels for transmitting the control signal traffic can be a multiple of the frame period, which represents that the data configured by block units are partially divided and transmitted for each slot.
  • The data transmitted to the downlink through the channel at the transmission time of the control signal traffic include broadcasting information, paging information, state management information, and data transmission control information.
  • Since control signal information channels for transmitting the control signal information divide and use the orthogonal frequencies because of characteristics of the OFDMA system, a preamble access grant channel for transmitting access grants on the preamble transmission can be configured with N subchannels from among the channel.
  • It is required to use the restricted radio resources with an appropriate ratio and purpose, and the assignment ratio of the resources is varied according to the cell configuration in the OFDMA system.
  • Therefore, it is desirable for the base station to separately notify the mobile station of configuration information of a preamble access grant channel, use the configuration information of the preamble access grant channel, and allow the mobile station to check the preamble acknowledgements ACK/NACK so that the base station may effectively manage the channel for transmitting the access grant of the preamble, compared to the method for fixing part of the control signal information channel to be a preamble access grant channel in consideration of the maximum value of the random access request available in the existing cell.
  • The data receiving processor 250 receives and processes the random access data transmitted by the mobile station 100 which has received the access grant of the access grant processor 240.
  • An operation of the random access data transmission system using OFDMA according to a preferred embodiment will now be described with reference to a drawing.
  • FIG. 4 shows a data transmission process of the random access data transmission method using OFDMA according to the preferred embodiment of the present invention.
  • As shown in the random access data transmission method using OFDMA, the resource selector 110 of the mobile station 100 initially selects a transmission radio resource used for transmitting the preamble in step S1.
  • The preamble transmitter 120 receives information on the transmission radio resource selected by the resource selector 110, generates a preamble, and transmits it to the base station 200 through a preamble transmission channel in step S2.
  • The preamble receiving processor 210 of the base station 200 analyzes the preamble received through the preamble transmitter 120, extracts preamble information including codes, timing, and power, and the ID manager 220 assigns a scheduling ID to the mobile station to be scheduled in step S3.
  • The access grant processor 240 determines acknowledgment/non-acknowledgment status on the preamble provided from the mobile station according to the preamble information extracted from the preamble receiving processor 210 and assigned status of the scheduling ID provided by the ID manager 220.
  • The access grant processor 240 configures preamble access grant configuring information by using the scheduling ID information, ACK/NACK information, and preamble information extracted from the preamble, and transmits the preamble access grant configuring information which is access grant information to the mobile station 100 through the control information transmission channel specified by the base station 200 in step S4.
  • The preamble access grant receiving processor 130 of the mobile station 100 receives the preamble access grant configuring information from the access grant processor 240 through the preamble acknowledgement channel, and checks successful preamble transmission status and the scheduling ID in step S5.
  • When finishing transmission of the preamble access grant configuring information, the base station 200 transmits assignment information of the data transmission channel determined after scheduling together with the scheduling ID assigned to a random access mobile station 100 by the scheduler 230 to the mobile station 100 through the control information transmission channel in steps S6 and S7.
  • The random access mobile station 100 checks assigned status of the data transmission channel of the scheduling ID transmitted through the control channel in step S8, and transmits the random access data through the data transmission channel assigned to the mobile station 100 in step S9.
  • In this instance, the mobile station 100 minimizes the influence given to the data transmitted to the base station by another mobile station by using transmission control information including timing, a frequency, and a power received through the preamble access grant configuring information, and transmits the random access data through the data transmission channel.
  • When the base station 200 finishes receiving the random access data through the data receiving processor 250, the ID manager 220 recovers and manages the scheduling ID assigned to the corresponding mobile station in step S10.
  • As described, the base station 200 assigns data transmission channels for variably transmitting the random access data according to assigned resource status to the access grant of the preamble transmitted from the mobile station.
  • To achieve this, the base station 200 provides a specific scheduling ID for each preamble when transmitting an access grant on the preamble received from the mobile station to the downlink, and notifies the mobile station of assignment information on the data transmission channel determined through the scheduling ID.
  • It is desirable to use the scheduling ID as an identifier of the mobile station used by the scheduler 230 and use the same for the physical layer and the MAC layer.
  • In consideration of the channel condition and QoS of each mobile station, the scheduler 230 selects a mobile station to which the data transmission channel will be assigned, and transmits corresponding assignment information through the data transmission control channel, and hence, the mobile station checks the assignment information in the data transmission control channel through the scheduling ID assigned to the mobile station, and transmits the random access data through the data transmission channel.
  • In this instance, the data transmission channel is a channel for allowing is the mobile station which is registered to the base station and is in the active state to transmit the data.
  • After receiving the random access data from the mobile station, the base station 200 transmits them to the system through a path other than that of the data of the registered mobile station. Therefore, the OFDMA-based random access data transmission system and method according to the preferred embodiment improves conventional inefficient usage of the transmission resources through assigning a separate random access data transmission channel.
  • While this invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
  • As described in the OFDMA-based random access data transmission system and method, the base station loads the mobile station's transmission control information and the scheduling ID information into the access grant of the preamble received from the mobile station and transmits them so that the mobile station may transmit the random access data through the data transmission channel without an additional separated channel, thereby enabling effective usage of the radio resources, and transmitting the data without influencing data transmission of other mobile stations by using the transmission control information.

Claims (13)

1.-15. (canceled)
16. A random access method in a wireless communication system, the method at a mobile station comprising:
transmitting a preamble, without random access message, through preamble transmission channel to a base station;
receiving a preamble response message that conveys a scheduling ID and an assignment information of radio resource of data transmission channel for random access data transmission; and
transmitting random access data to the base station through the radio resource of data transmission channel assigned to the mobile station,
wherein the scheduling ID is specific for the mobile station and identification for random access procedure,
wherein the preamble is generated by using a code that is distinguishable from other codes,
wherein the random access data is transmitted after the preamble is transmitted and the preamble response message is received in response to the preamble, and
wherein the scheduling ID is used for a physical layer and a Medium Access Control (MAC) layer of the mobile station.
17. The method of claim 16, wherein the assignment information of radio resource is associated with the scheduling ID.
18. The method of claim 16, wherein the preamble response message conveys timing and power information for transmitting random access data.
19. (canceled)
20. The method of claim 16, wherein data transmission channel over which random access data is transmitted is different from preamble transmission channel over which the preamble is transmitted.
21. The method of claim 16, wherein a configuration for receiving the preamble response message is determined in consideration of the maximum value of random access requests available in the base station, and the preamble response message is received from the base station with reference to the configuration.
22. A random access method in a wireless communication system, the method at a base station comprising:
receiving a preamble, without random access message, through preamble transmission channel from a mobile station;
transmitting a preamble response message that conveys a scheduling ID and an assignment information of radio resource of data transmission channel for random access data transmission; and
receiving random access data from the mobile station through the radio resource of data transmission channel assigned to the mobile station,
wherein the scheduling ID is specific for the mobile station and identification for random access procedure,
wherein the preamble is generated by using a code that is distinguishable from other codes,
wherein the random access data is transmitted after the preamble is transmitted and the preamble response message is received in response to the preamble, and
wherein the scheduling ID is used for a physical layer and a Medium Access Control (MAC) layer of the mobile station.
23. The method of claim 22, wherein the assignment information of radio resource is associated with the scheduling ID.
24. The method of claim 22, wherein the preamble response message conveys timing and power information for receiving random access data.
25. (canceled)
26. The method of claim 22, wherein data transmission channel over which random access data is received is different from preamble transmission channel over which the preamble is received.
27. The method of claim 22, wherein a configuration for transmitting the preamble response message is determined in consideration of the maximum value of random access requests available in the base station, and the preamble response message is transmitted to the mobile station with reference to the configuration.
US14/685,071 2003-12-11 2015-04-13 System and method for transmitting random access data using orthogonal frequency division multiple access Pending US20160295608A9 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11368275B2 (en) 2017-06-16 2022-06-21 Electronics And Telecommunications Research Institute Method for configuring bandwidth for supporting broadband carrier in communication system
US11812463B2 (en) * 2016-07-27 2023-11-07 Lenovo Innovations Limited (Hong Kong) Preamble based access for an uplink transmission

Families Citing this family (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006311475A (en) * 2005-03-31 2006-11-09 Ntt Docomo Inc Controller, mobile station, mobile communication system and control method
KR20070047124A (en) 2005-11-01 2007-05-04 엘지전자 주식회사 Method for transmitting and receiving wireless resource information
WO2007052972A1 (en) 2005-11-04 2007-05-10 Lg Electronics Inc. Random access channel hopping for frequency division multiplexing access systems
GB2469229B (en) * 2005-11-04 2011-02-02 Nec Corp Wireless communication system and method of controlling a transmission power
USRE46756E1 (en) 2006-03-21 2018-03-13 Lg Electronics Inc. Method of transmitting/receiving LTE system information in a wireless communication system
KR101151817B1 (en) 2006-05-03 2012-06-01 한국전자통신연구원 Method for transmitting up link contorl signal in mobile communication system
WO2007145488A2 (en) * 2006-06-16 2007-12-21 Lg Electronics Inc. Method for payload part transmission on contention channels
KR101133746B1 (en) * 2006-06-21 2012-04-09 한국전자통신연구원 A method to transmit downlink signaling message on cellular systems for packet transmission and method for receiving the message
US8295243B2 (en) 2006-08-21 2012-10-23 Qualcomm Incorporated Method and apparatus for random access in an orthogonal multiple-access communication system
KR20080018147A (en) * 2006-08-23 2008-02-27 한국전자통신연구원 A method for transmitting response message of random access in cellular system and a method of random access using the same
US8184609B2 (en) * 2006-08-25 2012-05-22 Samsung Electronics Co., Ltd. System and method for random access in a wireless communication system
US8396013B2 (en) * 2006-09-11 2013-03-12 Qualcomm Incorporated Method and apparatus for supporting half-duplex terminals in an asynchronous mode
JP4459204B2 (en) * 2006-09-22 2010-04-28 京セラ株式会社 OFDMA communication system and communication method
KR100937423B1 (en) * 2006-09-26 2010-01-18 엘지전자 주식회사 Method For Generating Repeated Sequence, And Method For Transmitting Signal Using The Same
JP4898918B2 (en) * 2006-10-02 2012-03-21 エルジー エレクトロニクス インコーポレイティド Retransmission method used in a multi-carrier system
EP3637668B1 (en) 2006-10-25 2020-12-23 Samsung Electronics Co., Ltd. Method and apparatus for allocating radio resource using random access procedure in a mobile communication system
KR101386214B1 (en) * 2007-01-09 2014-04-18 삼성전자주식회사 Transmission and reception method for ACK/NAK signaling in wireless communication systems
CN101589643B (en) * 2007-01-22 2012-05-23 富士通株式会社 Intermittent communication system, base station apparatus, and mobile station apparatus
US8559382B2 (en) * 2007-03-15 2013-10-15 Electronics And Telecommunications Research Institute Preamble allocation method and random access method in mobile communication system
EP2103017B1 (en) 2007-03-29 2014-01-08 LG Electronics Inc. Method of transmitting sounding reference signal in wireless communication system
KR20080110443A (en) * 2007-06-15 2008-12-18 삼성전자주식회사 Method and apparatus for assigning ack/nack resource in mobile communication system
WO2008153367A1 (en) 2007-06-15 2008-12-18 Samsung Electronics Co., Ltd. Method and apparatus for allocating and acquiring ack/nack resources in a mobile communication system
US8599819B2 (en) 2007-06-19 2013-12-03 Lg Electronics Inc. Method of transmitting sounding reference signal
EP2162991B1 (en) * 2007-06-29 2015-12-23 Telefonaktiebolaget L M Ericsson (publ) Method for fast acknowledgement and identification of a service access request message or a preamble thereof
KR101274400B1 (en) * 2007-08-10 2013-06-17 후지쯔 가부시끼가이샤 Method of random access in radio communication system, radio communication system, radio terminal and base station apparatus
EP3293905B1 (en) 2007-08-14 2021-02-17 LG Electronics Inc. Method for acquiring resource region information for phich
WO2009022790A1 (en) * 2007-08-14 2009-02-19 Lg Electronics Inc. Method of transmitting data in a wireless communication system
KR101397039B1 (en) * 2007-08-14 2014-05-20 엘지전자 주식회사 Signal Transmission Method Using CDM Against The Effect Of Channel Estimation Error in Transmit Diversity System
KR101405974B1 (en) 2007-08-16 2014-06-27 엘지전자 주식회사 Methods for transmitting codewords in multiple input multiple output system
KR101507785B1 (en) 2007-08-16 2015-04-03 엘지전자 주식회사 A method for transmitting channel quality information in a MIMO (Multiple Input Multiple Output) system
ES2366770T3 (en) * 2007-11-01 2011-10-25 Koninklijke Philips Electronics N.V. INCREASED IMPROVED POWER FOR RACH.
US8446859B2 (en) * 2008-02-01 2013-05-21 Lg Electronics Inc. Method for controlling uplink load in cell— FACH state
WO2009113815A2 (en) * 2008-03-13 2009-09-17 Lg Electronics Inc. Random access method for improving scrambling efficiency
KR100893869B1 (en) * 2008-03-13 2009-04-20 엘지전자 주식회사 Harq processing method considering measurement gap
EP2104264B1 (en) * 2008-03-21 2016-08-17 LG Electronics Inc. Method of data communication in a wireless communication system, comprising indicators for process control
US8437291B2 (en) * 2008-03-24 2013-05-07 Lg Electronics Inc. Method for configuring different data block formats for downlink and uplink
US8428077B2 (en) * 2008-03-31 2013-04-23 Qualcomm Incorporated Methods and apparatus for dynamic load balancing with E-AICH
KR101206161B1 (en) * 2008-06-12 2012-11-28 한국전자통신연구원 A method for management on user terminal and interference control of small base station on cellular systems
GB2461159B (en) 2008-06-18 2012-01-04 Lg Electronics Inc Method for transmitting Mac PDUs
WO2009154403A2 (en) 2008-06-18 2009-12-23 Lg Electronics Inc. Method of transmitting power headroom reporting in wireless communication system
KR100968020B1 (en) 2008-06-18 2010-07-08 엘지전자 주식회사 Method for performing random access procedures and terminal thereof
US11272449B2 (en) 2008-06-18 2022-03-08 Optis Cellular Technology, Llc Method and mobile terminal for performing random access
GB2461158B (en) 2008-06-18 2011-03-02 Lg Electronics Inc Method for performing random access procedures and terminal therof
GB2461780B (en) 2008-06-18 2011-01-05 Lg Electronics Inc Method for detecting failures of random access procedures
US7957298B2 (en) 2008-06-18 2011-06-07 Lg Electronics Inc. Method for detecting failures of random access procedures
KR100949972B1 (en) 2009-01-02 2010-03-29 엘지전자 주식회사 Random access scheme for user equipment
KR101122095B1 (en) 2009-01-05 2012-03-19 엘지전자 주식회사 Random Access Scheme Preventing from Unnecessary Retransmission, and User Equipment For the Same
US8768263B2 (en) 2010-12-01 2014-07-01 Qualcomm Incorporated Determining an uplink control path with blind decoding
KR102273492B1 (en) * 2011-12-08 2021-07-08 인터디지탈 패튼 홀딩스, 인크 COMMUNICATING USING MULTIPLE RADIO ACCESS TECHNOLOGIES (RATs)
US9295085B2 (en) * 2012-10-15 2016-03-22 Intel Corporation Communication system and method of data transmission for a medium access control layer
CN103269363B (en) * 2013-05-10 2016-08-31 无锡成电科大科技发展有限公司 Car based on OFDMA access technology networking uplink synchronous system and method
US9451639B2 (en) * 2013-07-10 2016-09-20 Samsung Electronics Co., Ltd. Method and apparatus for coverage enhancement for a random access process
KR102322497B1 (en) 2016-05-31 2021-11-09 한국전자통신연구원 Non-orthogonal based uplink transmission method and apparatus
EP3589061B1 (en) 2017-02-23 2022-08-24 LG Electronics Inc. Method for transmitting or receiving signal in wireless communication system and device therefor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030231607A1 (en) * 2002-05-30 2003-12-18 Scanlon Williamgiles Wireless network medium access control protocol
US20040109405A1 (en) * 2002-12-03 2004-06-10 Samsung Electronics Co., Ltd. Apparatus and method for generating a preamble sequence in an OFDM communication system
US6819930B1 (en) * 2000-11-03 2004-11-16 Lucent Technologies Inc. Apparatus and method for use in allocating a channel resource in wireless multiple access communications systems
US20050105505A1 (en) * 2003-11-07 2005-05-19 Eran Fishler Transceiver for a wireless local area network having a sparse preamble data sequence
US7023836B2 (en) * 2000-07-31 2006-04-04 Alcatel Transport interface for time division frames
US7120852B2 (en) * 2003-06-27 2006-10-10 Nokia Corporation Method and apparatus for packet aggregation in a wireless communication network
US7787519B2 (en) * 2001-11-08 2010-08-31 Ntt Docomo, Inc. Preamble transmission method, mobile station, mobile communication system, preamble transmission program and computer data signal
US20130028239A1 (en) * 2011-07-25 2013-01-31 Esmael Dinan Time Alignment in Multicarrier OFDM Network

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE515752C2 (en) * 1995-08-28 2001-10-08 Telia Ab Direct access in OFDM system
US5790551A (en) 1995-11-28 1998-08-04 At&T Wireless Services Inc. Packet data transmission using dynamic channel assignment
US6091717A (en) * 1997-05-05 2000-07-18 Nokia Mobile Phones Limited Method for scheduling packet data transmission
DE19800953C1 (en) 1998-01-13 1999-07-29 Siemens Ag Resource allocation in radio interface of radio communications system
US6643275B1 (en) * 1998-05-15 2003-11-04 Telefonaktiebolaget Lm Ericsson (Publ) Random access in a mobile telecommunications system
GB9823467D0 (en) * 1998-10-28 1998-12-23 Koninkl Philips Electronics Nv Radio communication system
EP1037491A1 (en) 1999-03-17 2000-09-20 Motorola Limited A CDMA cellular communication system and method of access therefor
KR100526508B1 (en) * 1999-08-17 2005-11-08 삼성전자주식회사 apparatus and method for access communicating in cdma communication system
SE519303C2 (en) * 2000-06-20 2003-02-11 Ericsson Telefon Ab L M Device for narrowband communication in a multicarrier system
US6694496B2 (en) 2000-08-03 2004-02-17 Morphics Technology, Inc. Flexible preamble processing for detecting a code sequence
US7257546B2 (en) * 2001-09-04 2007-08-14 Yahoo! Inc. System and method for correlating user data from a content provider and user data from an advertising provider that is stored on autonomous systems
KR100452639B1 (en) * 2001-10-20 2004-10-14 한국전자통신연구원 Common Packet Channel Access Method for Mobile Satellite Communication System
US7248659B2 (en) * 2002-02-20 2007-07-24 Freescale Semiconductor, Inc. Method for adjusting acquisition speed in a wireless network
US8320301B2 (en) * 2002-10-25 2012-11-27 Qualcomm Incorporated MIMO WLAN system
US20040109433A1 (en) * 2002-12-06 2004-06-10 Khan Farooq Ullah Reverse link packet acknowledgement method
US7738437B2 (en) * 2003-01-21 2010-06-15 Nortel Networks Limited Physical layer structures and initial access schemes in an unsynchronized communication network
KR100735277B1 (en) * 2003-07-30 2007-07-03 삼성전자주식회사 Method for ranging in broadband wireless access communication system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7023836B2 (en) * 2000-07-31 2006-04-04 Alcatel Transport interface for time division frames
US6819930B1 (en) * 2000-11-03 2004-11-16 Lucent Technologies Inc. Apparatus and method for use in allocating a channel resource in wireless multiple access communications systems
US7787519B2 (en) * 2001-11-08 2010-08-31 Ntt Docomo, Inc. Preamble transmission method, mobile station, mobile communication system, preamble transmission program and computer data signal
US20030231607A1 (en) * 2002-05-30 2003-12-18 Scanlon Williamgiles Wireless network medium access control protocol
US20040109405A1 (en) * 2002-12-03 2004-06-10 Samsung Electronics Co., Ltd. Apparatus and method for generating a preamble sequence in an OFDM communication system
US7120852B2 (en) * 2003-06-27 2006-10-10 Nokia Corporation Method and apparatus for packet aggregation in a wireless communication network
US20050105505A1 (en) * 2003-11-07 2005-05-19 Eran Fishler Transceiver for a wireless local area network having a sparse preamble data sequence
US20130028239A1 (en) * 2011-07-25 2013-01-31 Esmael Dinan Time Alignment in Multicarrier OFDM Network

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11812463B2 (en) * 2016-07-27 2023-11-07 Lenovo Innovations Limited (Hong Kong) Preamble based access for an uplink transmission
US11368275B2 (en) 2017-06-16 2022-06-21 Electronics And Telecommunications Research Institute Method for configuring bandwidth for supporting broadband carrier in communication system
US11799622B2 (en) 2017-06-16 2023-10-24 Electronics And Telecommunications Research Institute Method for configuring bandwidth for supporting broadband carrier in communication system

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DE602004024708D1 (en) 2010-01-28
KR100567211B1 (en) 2006-04-03
KR20050057926A (en) 2005-06-16
US7680156B2 (en) 2010-03-16
EP1692797A1 (en) 2006-08-23
USRE45466E1 (en) 2015-04-14
US20160295608A9 (en) 2016-10-06
ATE452476T1 (en) 2010-01-15

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