WO2008089677A1 - Procédé et système de mesure du temps de transmission aller-retour - Google Patents

Procédé et système de mesure du temps de transmission aller-retour Download PDF

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Publication number
WO2008089677A1
WO2008089677A1 PCT/CN2008/070104 CN2008070104W WO2008089677A1 WO 2008089677 A1 WO2008089677 A1 WO 2008089677A1 CN 2008070104 W CN2008070104 W CN 2008070104W WO 2008089677 A1 WO2008089677 A1 WO 2008089677A1
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WO
WIPO (PCT)
Prior art keywords
base station
terminal
message
measurement
measurement base
Prior art date
Application number
PCT/CN2008/070104
Other languages
English (en)
French (fr)
Inventor
Wenliang Liang
Jianjun Wu
Original Assignee
Huawei Technologies Co., Ltd.
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
Priority claimed from CN2007101817607A external-priority patent/CN101325782B/zh
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008089677A1 publication Critical patent/WO2008089677A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W64/00Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Definitions

  • the present invention relates to the field of wireless communications, and in particular to a method for measuring Round Trip Delay (RTD) in a wireless system and a corresponding wireless access system.
  • RTD Round Trip Delay
  • Ranging In a wireless communication system, in order to maintain the quality of a wireless communication link between a terminal and a network, a mechanism is needed to adjust parameters such as relative time, transmission power, and frequency offset of the terminal and the network. This process is called ranging. ( Ranging ).
  • OFDMA Orthogonal Frequency Division Multi Access
  • the terminal When the initial Ranging is applied to the initial access of the network, the terminal has synchronized the downlink data of the network, and obtains some configuration parameters of the uplink, but needs to randomly select the access slot and the CDMA codeword;
  • the purpose of periodic Ranging is to detect the change of the status of the wireless link. Once the status of the wireless link changes, the corresponding parameter adjustment needs to be made;
  • the Ranging in the handover process is similar to the initial Ranging, but it is possible that the target base station (BS) has pre-allocated the relevant Ranging resources to the terminal.
  • BS target base station
  • the initial Ranging based on contention is described as follows: 1.
  • the terminal synchronizes the downlink data of the BS, parses the uplink transmission parameters of the BS broadcast, and then A Ranging slot and a CDMA codeword are randomly selected and sent to the BS.
  • the BS After receiving the CDMA codeword, the BS cannot determine which terminal is transmitting the CDMA codeword, and only broadcasts one RNG-RSP (Ranging Response) message.
  • the RNG-RSP message includes the CDMA codeword and the Ranging slot in which the CDMA codeword is received. In this way, the terminal can use this information to determine whether the RNG-RSP is for itself.
  • the RNG-RSP message also includes some adjustment information on time, power, and frequency offset, and status information of Ranging.
  • the terminal needs to adjust according to the adjustment information in the RNG-RSP message, and then continue to transmit the CDMA codeword.
  • the BS also carries the CDMA-Allocation-IE (CDMA Allocation Information Element) in the transmitted UL-MAP (Uplink Resource Correspondence Table) message.
  • CDMA-Allocation-IE CDMA Allocation Information Element
  • the role of the CDMA-Allocation-IE is to indicate a physical resource that the terminal can use to send RNG-REQ (Ranging Request) messages.
  • the BS After receiving the RNG-REQ message, the BS responds with RNG-RSP, this time.
  • the RNG-RSP message contains a basic connection identifier (CID) assigned to the terminal.
  • CID basic connection identifier
  • the terminal maintains a clock, and the terminal must receive the RNG-RSP before the clock expires.
  • the Ranging process contains measurements of the RTD.
  • RTD measurements are important in network access, handover, and LoCation Services (LCS) positioning.
  • LCS LoCation Services
  • the RTD is measured to obtain the distance difference between the terminal and the two BSs, thereby calculating the current position of the terminal.
  • OTD Observed Time Difference Of Arrival
  • the RTD is measured to obtain the distance difference between the terminal and the two BSs, thereby calculating the current position of the terminal.
  • RTD Relative Time Difference
  • Embodiments of the present invention provide a method and system for measuring an RTD, which implements positioning of a terminal in an idle state.
  • the base station sends a first message, where the first message carries the location indication information and the terminal identifier;
  • the terminal After the terminal parses that the first message includes the terminal identifier corresponding to the first message, the terminal selects the measurement base station to perform the ranging process;
  • a wireless access system provided by an embodiment of the present invention includes:
  • a base station configured to send a first message, where the first message carries positioning indication information and a terminal identifier
  • the wireless terminal is configured to receive the first message, and after parsing that the received first message includes the terminal identifier corresponding to the terminal, the measurement base station is selected to perform a ranging process, and the terminal and each measurement base station are obtained according to the ranging process. Round trip delay RTD value between.
  • the first instruction unit configured to send a first message to the terminal, and carry the positioning indication information and the terminal identifier;
  • the first ranging unit is configured to perform a ranging process with the terminal.
  • a wireless terminal provided by an embodiment of the present invention includes: a second instruction unit and a second ranging unit;
  • the second instruction unit is configured to receive the carrying location indication information and the terminal identifier first message sent by the base station, and after the received first message includes the terminal identifier corresponding to the terminal, notify the second ranging unit;
  • the second ranging unit is configured to select a measurement base station according to the positioning indication information, and perform a ranging process with the selected measurement base station to obtain the RTD value.
  • the base station sends a first message, where the first message carries the location indication information and the terminal identifier;
  • the terminal After the terminal parses that the first message includes its own corresponding terminal identifier, the terminal selects the measurement base station to obtain the measured value.
  • a base station configured to send a first message, where the first message carries positioning indication information and a terminal identifier
  • the wireless terminal is configured to receive the first message, and after parsing that the received first message includes the terminal identifier corresponding to the terminal, and selecting the measurement base station to obtain the measured value.
  • a third instruction unit configured to send a first message to the terminal, and carry the positioning indication information and the terminal identifier
  • the third obtaining unit is configured to obtain a measured value.
  • a wireless terminal provided by an embodiment of the present invention includes: a fourth instruction unit and a fourth acquisition unit;
  • the fourth instruction unit is configured to receive the carrying location indication information and the terminal identifier first message sent by the base station, and parse the received first message that includes the terminal identifier corresponding to the terminal identifier Afterwards, notifying the fourth obtaining unit;
  • the fourth acquiring unit is configured to select a measurement base station to obtain a measurement value according to the positioning indication information.
  • the method and system for measuring the RTD and the method and system for obtaining the measured value provided by the embodiment of the present invention, the method for transmitting the broadcast message carrying the positioning indication information to the terminal by the attached base station, can realize the positioning of the terminal in the Idle state, and solve the prior art.
  • the middle base station locates the terminal in the Idle state, it must first activate the terminal.
  • FIG. 1 is a schematic diagram of a signaling process for performing RTD measurement when a terminal in an idle state is not activated according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a function of a wireless terminal according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of a signaling process for obtaining a measurement value when a terminal in an idle state is not activated according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of another base station according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of another wireless terminal according to an embodiment of the present disclosure. detailed description
  • the first message is sent by the base station, and the first message carries the positioning indication information and the terminal identifier.
  • the terminal parses the received first message and includes the terminal identifier corresponding to the terminal, the terminal selects the measurement base station to perform the ranging process.
  • the ranging process between the two obtains a round-trip delay RTD value between the terminal and the measurement base station.
  • An embodiment 1 of a method of measuring an RTD The first message sent by the base station to the terminal is a broadcast message.
  • the base station sends a paging broadcast MOB-PAG-ADV message to the terminal, where the message carries the positioning indication information and the terminal identifier, and starts RTD measurement on the terminal in the idle state.
  • FIG. 1 is a schematic diagram of a signaling process for performing RTD measurement when a terminal in an idle state is not activated according to an embodiment of the present invention
  • the base station sends a MOB-PAG-ADV message to the terminal, and carries the positioning indication information and the terminal identifier.
  • the base station when it is required to measure the RTD value of the terminal in the idle state, the base station sends a MOB-PAG-ADV message to the terminal, and carries the positioning indication information and the terminal identifier.
  • the MOB-PAG-ADV message may be sent by the attached base station to the terminal, and the positioning indication information and the terminal identifier are carried, where the attached base station refers to the best base station where the terminal is located in the Idle state. It is called a preferred base station.
  • the attached base station serves as the serving base station of the terminal.
  • the positioning indication information may be a specific positioning type or a specified number of scanning base stations, for example, indicating that the positioning type is Cell-RTD positioning or OTDOA positioning or other positioning type; or further, the positioning indication information may also be Includes positioning accuracy information, etc.
  • the MOB-PAG-ADV message may further carry a candidate measurement base station list, and specify the candidate measurement base station.
  • the method further includes: requiring the terminal to send the CDMA codeword to the corresponding measurement base station for the first time. The corresponding estimated lead time for triggering the ranging process.
  • the estimated advance time information corresponding to the candidate measurement base station may be directly requested by the attaching base station to each candidate measurement base station, or obtained by the access network gateway transfer request.
  • the estimated advance time information corresponding to the candidate measurement base station may be determined by the attached base station.
  • the attached base station may further request, by the measurement base station in the candidate measurement base station list, the CDMA codeword that triggers the ranging, and the CDMA codeword returned by the measurement base station is also passed the first message. 1 is the MOB-PAG-ADV message) carried to the terminal.
  • the MOB-PAG-ADV message may further include a physical resource allocated by the corresponding measurement base station for ranging.
  • the positioning assistance information may be further carried in the MOB-PAG-ADV message, where the positioning assistance information may include a CDMA codeword, and/or an air interface resource allocated by the measurement base station.
  • the carried positioning assistance information may be all or part of the candidate measurement base station list carried in the MOB-PAG-ADV message.
  • the positioning assistance information allocated by the candidate base station may be included in the embodiment of the present invention.
  • the positioning assistance information allocated by only one measurement base station may be included, which may save air interface resources.
  • the positioning assistance information allocated by only one measurement base station may be included.
  • the positioning assistance information allocated by any one of the measurement base stations in the candidate measurement base station list may also be the positioning assistance information allocated by the base station that transmits the current MOB-PAG-ADV message. If there is no candidate measurement base station list in the MOB-PAG-ADV message, the positioning assistance information may be location assistance information allocated by the base station that sends the current MOB-PAG-ADV message, and the base station may be an attached base station.
  • the terminal may select the measurement base station and send the measurement to the measurement base station.
  • a CDMA codeword is randomly selected to initiate the ranging process.
  • the terminal selection measurement base station may select the measurement base station according to the positioning indication information carried in the received MOB-PAG-ADV message, for example, the attached base station may be selected as the measurement base station, or multiple selections may be selected.
  • the base station acts as a measurement base station.
  • the selecting the measurement base station may also be that the terminal has a strong signal strength.
  • the measurement base station is selected and the ranging process is started in the base station with the preset threshold value.
  • the attached base station may be selected as the measurement base station, or multiple base stations may be selected as the measurement base station.
  • the terminal may select all or part of the base stations from the candidate measurement base station list as the measurement base station. And respectively transmitting a randomly selected CDMA codeword to each measurement base station to start a ranging process; further, if the received MOB-PAG-ADV message carries a list of candidate measurement base stations, the terminal is also required to be included. The first time the CDMA codeword is sent to the corresponding estimated lead time of the corresponding measurement base station triggering the ranging process, the terminal should send a randomly selected CDMA codeword to each measurement base station within the estimated advance time to start the ranging process.
  • the terminal sends the corresponding CDMA codeword to the measurement base station, and starts a ranging process.
  • the terminal obtains the CDMA codeword corresponding to the base station and the physical resource allocated for the ranging from the MOB-PAG-ADV message sent by the attached base station, the obtained CDMA codeword is used. And performing a ranging process with the physical resource allocated for the ranging and the corresponding measurement base station.
  • the terminal performs a ranging process with the corresponding measurement base station according to the positioning assistance information.
  • the process can be divided into the following situations:
  • the terminal performs the measurement according to the positioning assistance information and the corresponding partial measurement base station. From the process, and by the part of the measurement base station Any one of the measurement base stations acquiring the positioning assistance information of the measurement base station that is not performing the ranging process, and transmitting the positioning assistance information to the terminal, the terminal performing the ranging process according to the positioning assistance information and the next measurement base station;
  • the positioning assistance information of the measurement base station that acquires the next non-execution ranging process may be the positioning assistance information of the measurement base station that acquires the next unexecuted ranging process by using the back-end network interaction.
  • the previous measurement base station may acquire the positioning auxiliary information of the next measurement base station through the back-end network and send the positioning auxiliary information to the terminal, and the terminal according to the positioning auxiliary information
  • the next measurement base station performs the ranging process until the last measurement base station completes the ranging process with the terminal.
  • Case c If the positioning assistance information of all the measurement base stations is not carried in the MOB-PAG-ADV message, but the positioning assistance information of the measurement base station, such as the positioning assistance information of the first measurement base station, the terminal follows the positioning.
  • the auxiliary information and the first measurement base station perform a ranging process. After the first measurement base station is successfully ranging, the first measurement base station sends the positioning assistance information of the next measurement base station to the terminal, and the terminal follows the positioning auxiliary information of the next measurement base station. And performing the ranging process with the next measurement base station; in the embodiment of the present invention, the first measurement base station may acquire the positioning assistance information of the next measurement base station by using the back-end network interaction.
  • the previous measurement base station may acquire the positioning auxiliary information of the next measurement base station through the back-end network and send the positioning auxiliary information to the terminal, and the terminal according to the positioning auxiliary information
  • the next measurement base station performs the ranging process until the last measurement base station completes the ranging process with the terminal.
  • the terminal and each measurement base station obtain the RTD measurement result and report it in the Ranging process.
  • the specific reporting method is as follows:
  • the terminal sends a second message to the measurement base station, for example, the second message is a ranging request RNG-REQ message, and the obtained RTD measurement data is carried in the RNG-REQ message, and carries the attached base station identifier currently attached by the terminal. , or carry the paging controller identifier of the terminal.
  • the measurement base station parses the received RNG-REQ message and finds that it carries the measurement data.
  • the RNG-REQ message is a positioning result report message; then the measurement base station sends the parsed RTD value to the attached base station to which the terminal is attached or to the paging controller sent to the terminal.
  • Manner 2 The terminal sends a second message to the measurement base station, for example, the second message is a ranging request RNG-REQ message, and the RNG-REQ message carries the obtained RTD measurement data, and the attached base station identifier currently attached by the mobile terminal. Or the paging controller identifier of the terminal, further carrying an indication information, explicitly indicating that the RNG-REQ message is a report message triggered by the positioning; then measuring the base station to send the RTD value to the attached base station to which the terminal is attached or sending the The paging controller of the terminal.
  • the second message is a ranging request RNG-REQ message
  • the RNG-REQ message carries the obtained RTD measurement data, and the attached base station identifier currently attached by the mobile terminal.
  • the paging controller identifier of the terminal further carrying an indication information, explicitly indicating that the RNG-REQ message is a report message triggered by the positioning; then measuring the base station to send the RTD value to the attached base station to which the terminal
  • Manner 3 Define a new RTD report message in the idle state, and carry the obtained RTD measurement data, and also carry the attached base station identifier currently attached by the terminal or the paging controller identifier of the mobile terminal. After receiving the newly defined report message, the measurement base station obtains the RTD measurement result value carried by the base station, and then measures the base station to send the RTD value to the attached base station or the paging controller attached to the terminal.
  • Manner 4 After the terminal completes the measurement of each measurement base station, the measurement result of each measurement base station is recorded, and then the air interface message is sent to the attached base station to which it is attached, or is sent to the network side gateway or is set to the network side and is dedicated to the positioning calculation. Network entity.
  • the transmitted air interface message includes a list of measurement results, and the RTD value between the storage terminal and each measurement base station.
  • the specific air interface message may be an RNG-REQ message, or may be a newly defined RTD report message in an idle state.
  • the attached base station After receiving the reported RTD measurement result, the attached base station returns a corresponding response message to the terminal.
  • the attached base station After receiving the reported RTD measurement result, the attached base station can calculate the positioning result of the terminal according to the RTD measurement result. In this way, the network side can locate the terminal in the Idle state without activating the terminal in the Idle state.
  • the attached base station may further send the positioning result to the terminal, for example, the positioning result may be sent to the terminal by using the response message, or may be A message is newly defined, and the positioning result is sent to the terminal by using the newly defined message, and the newly defined message should be a message that the terminal can receive in the Idle state.
  • the measurement base station may calculate the RTD and report to the attached base station and the network side of the terminal when the measurement base station determines that the Ranging is successful.
  • the estimated lead time negotiation between the terminal and the measurement base station There are many ways to implement the estimated lead time negotiation between the terminal and the measurement base station. For example, the RNG-REQ message sent by the terminal and the measurement base station is carried, and the estimated advance time information corresponding to the measurement base station is notified; or the measurement base station to be selected by the terminal. And the corresponding estimated advance time information is reported to the attached base station, and the attached base station separately notifies each measurement base station.
  • the terminal after receiving the first message (such as the MOB-PAG-ADV message) sent by the attached base station, if the terminal does not support positioning or does not want to be located, the terminal returns a location rejection to the attached base station, for example,
  • the RNG-REQ message carries an indication of a location rejection indication.
  • the embodiment of the present invention may also pass the UL_MAP message. See, in particular, an embodiment 2 of a method of measuring an RTD.
  • An embodiment of the method for measuring an RTD The base station sends an uplink resource correspondence table UL-MAP message to the terminal, where the message carries the positioning indication information and the terminal identifier, and starts RTD measurement on the terminal in the idle state.
  • the base station when it is required to measure the RTD value of the terminal in the idle state, the base station sends a UL-MAP message to the terminal, and carries the positioning indication information and the terminal identifier.
  • the attached base station may send a UL-MAP message to the terminal, and carry the positioning indication information and the terminal identifier.
  • the positioning indication information carried in the UL-MAP message may be indicating a specific positioning type or Specifying the number of scanning base stations, etc., for example, indicating that the positioning type is Cell-RTD positioning or OTDOA positioning or other positioning type; or further, the positioning indication information may further include positioning accuracy information and the like.
  • the UL-MAP message may be a terminal that indicates the location by using the MAC address of the terminal, or a hash function value of the MAC address; the PHY that the final measurement result is sent by the CDMA-Allocation-IE in the UL-MAP message. Resources.
  • the UL-MAP message may further carry a candidate measurement base station list, and specify the candidate measurement base station.
  • the method further includes: requiring the terminal to send the CDMA codeword for the first time to trigger triggering on the corresponding base station. Estimated lead time for the process.
  • the physical resource that sends the final measurement result by interacting with the terminal with other existing signaling assignment terminals may also be included.
  • the estimated advance time information corresponding to the candidate measurement base station may be directly requested by the attaching base station to each candidate measurement base station, or may be forwarded by the access network gateway.
  • the estimated advance time information corresponding to the candidate measurement base station may be determined autonomously by the attaching base station.
  • the attached base station may further request, by the measurement base station in the candidate measurement base station list, the CDMA codeword that triggers the ranging, and the CDMA codeword returned by the measurement base station is also passed the first message.
  • 2 is a UL-MAP message) carried to the terminal.
  • the UL-MAP message may further include a physical resource allocated by the corresponding measurement base station for ranging.
  • the positioning assistance information may be further carried in the UL-MAP message, where the positioning assistance information may include a CDMA codeword, and/or measure an air interface resource allocated by the base station.
  • the carried location assistance information may be all or part of the candidate measurement base station allocation in the list of candidate measurement base stations carried in the UL-MAP message.
  • the positioning assistance information in the embodiment of the present invention, may also include only one positioning auxiliary information allocated by the measurement base station, which can save space.
  • the port resource, where the location assistance information that is included in the measurement base station allocation may be the location assistance information allocated by any one of the measurement base station lists, and may also include the current UL-MAP message.
  • the embodiment of the invention further provides a method for obtaining a measured value, which is specifically as follows:
  • the first message sent by the base station to the terminal is a broadcast message.
  • the base station sends a paging broadcast MOB-PAG-ADV message to the terminal, where the message carries the positioning indication information and the terminal identifier, and indicates the terminal in the idle state to perform measurement.
  • FIG. 4 is a schematic flowchart of signaling performed when a terminal in an idle state is not activated according to an embodiment of the present invention
  • the base station sends a MOB-PAG-ADV message to the terminal, and carries the positioning indication information and the terminal identifier.
  • the measured value when the measured value of the terminal in the idle state is required, in the embodiment of the present invention, the measured value may be a round trip delay RTD, a relative delay RD, an received signal strength RSSI, or a carrier interference noise ratio CINR, and the like.
  • the base station sends the MOB-PAG-ADV message to the terminal, and carries the positioning indication information and the terminal identifier. Further, in the embodiment of the present invention, the MOB-PAG-ADV message may also carry the measurement. type of data.
  • the positioning indication information includes one or any combination of the positioning type information, the positioning accuracy information, and the number of scanning base stations.
  • the positioning indication information may further include a measurement data type.
  • the MOB-PAG-ADV message may be sent by the attached base station to the terminal, and the location indication information, the terminal identifier, and the measurement data type are carried, and the attached base station refers to a signal where the terminal is located in the Idle state.
  • the best base station, or the terminal is connected to receive the MOB-PAG-ADV message.
  • the base station is called a preferred base station.
  • the terminal identifier is carried in the MOB-PAG-ADV message
  • the positioning indication information is carried in the Action (trigger action indication) field in the MOB-PAG-ADV message.
  • the positioning indication information may be a specific positioning type or a specified number of scanning base stations, for example, indicating that the positioning type is Cell-RTD positioning or OTDOA positioning or other positioning type; or further, the positioning indication information may also be Including the positioning accuracy information, etc.; or further, the positioning indication information may further include a measurement data type (eg, one or more of a round trip delay RTD, a relative delay RD, an accepted signal strength RSSI, a carrier interference noise ratio CINR, etc.) Wait.
  • a measurement data type eg, one or more of a round trip delay RTD, a relative delay RD, an accepted signal strength RSSI, a carrier interference noise ratio CINR, etc.
  • the MOB-PAG-ADV message may further carry the measurement data type, and specify a specific data type that the terminal needs to measure.
  • the MOB-PAG-ADV message may further carry a candidate measurement base station list, and specify the candidate measurement base station.
  • the method further includes: requiring the terminal to send the CDMA codeword to the corresponding measurement base station for the first time. The corresponding estimated lead time for triggering the ranging process.
  • the estimated advance time information corresponding to the candidate measurement base station may be directly requested by the attaching base station to each candidate measurement base station, or obtained by the access network gateway transfer request.
  • the estimated advance time information corresponding to the candidate measurement base station may be determined autonomously by the attaching base station.
  • the attached base station may further request, by the measurement base station in the candidate measurement base station list, the CDMA codeword that triggers the ranging, and the CDMA codeword returned by the measurement base station is also passed the first message.
  • 3 is the MOB-PAG-ADV message) carried to the terminal.
  • the MOB-PAG-ADV message may further include a physical resource allocated by the corresponding measurement base station for ranging.
  • the positioning assistance information may be further carried in the MOB-PAG-ADV message, where the positioning assistance information may include a CDMA codeword, and/or measure an air interface resource allocated by the base station.
  • the carried positioning assistance information may be all or part of the candidate measurement base station list carried in the MOB-PAG-ADV message.
  • the positioning assistance information allocated by the candidate base station may be included in the embodiment of the present invention.
  • the positioning assistance information allocated by only one measurement base station may be included, which may save air interface resources.
  • the positioning assistance information allocated by only one measurement base station may be included. It is the positioning assistance information allocated by any one of the measurement base stations in the candidate measurement base station list, and may also be the positioning assistance information allocated by the base station that transmits the current MOB-PAG-ADV message. If there is no candidate measurement base station list in the MOB-PAG-ADV message, the positioning assistance information may be positioning assistance information allocated by the base station that sends the current MOB-PAG-ADV message, and the base station may be an attached base station. In the embodiment of the present invention, all the measurement base stations may all allocate the same positioning assistance information, so that the terminal only needs to send the CDMA codeword once, and the measurement base stations on the network side can mutually interact to obtain the relative delay RD value.
  • the terminal may select the measurement base station and send the measurement to the measurement base station.
  • a randomly selected CDMA codeword initiates the measurement process.
  • the terminal selection measurement base station may select the measurement base station according to the positioning indication information carried in the received MOB-PAG-ADV message, for example, the attached base station may be selected as the measurement base station, or multiple selections may be selected.
  • the base station acts as a measurement base station.
  • the downlink signals of the respective measurement base stations can be detected to obtain the measured values of the measurement base station.
  • the ranging process may be performed for each measurement base station to obtain the round-trip delay RTD value of all measurement base stations; or a reference base station may be selected (the MS receives the MOB-PAG-ADV) The base station of the message) performs a ranging process to obtain the base
  • the round-trip delay RTD value of the quasi-base station is measured by measuring the relative delay of the base station for other measurement base stations.
  • the selecting the measurement base station may also be that the terminal selects the measurement base station from the base station whose signal strength is greater than the preset threshold value, and starts the measurement process, for example, the attached base station may be selected as the measurement base station, or A plurality of base stations are selected as measurement base stations.
  • the terminal may select all or part of the base stations from the candidate measurement base station list as the measurement base station. And respectively transmitting a randomly selected CDMA codeword to each measurement base station to start a ranging process; further, if the received MOB-PAG-ADV message carries a list of candidate measurement base stations, the terminal is also required to be included. The first time the CDMA codeword is sent to the corresponding estimated lead time of the corresponding measurement base station triggering the ranging process, the terminal should send a randomly selected CDMA codeword to each measurement base station within the estimated advance time to start the ranging process.
  • the terminal sends the corresponding CDMA codeword to the measurement base station, and starts a ranging process.
  • the terminal obtains the CDMA codeword corresponding to the base station and the physical resource allocated for the ranging from the MOB-PAG-ADV message sent by the attached base station, the obtained CDMA codeword is used. And performing a ranging process with the physical resource allocated for the ranging and the corresponding measurement base station.
  • the terminal performs a ranging process with the corresponding measurement base station according to the positioning assistance information.
  • the process can be divided into the following situations:
  • Case a if the received MOB-PAG-ADV message carries the positioning assistance information of all the candidate measurement base stations in the candidate measurement base station list, the terminal performs the ranging process according to the positioning assistance information and the corresponding measurement base station. .
  • case b if the received MOB-PAG-ADV message carries the positioning assistance information allocated by the partial candidate measurement base station in the candidate measurement base station list, the terminal performs the measurement according to the positioning assistance information and the corresponding partial measurement base station. From the process, and acquiring, by the part of the measurement base stations, the positioning assistance information of the measurement base station that is not performing the ranging process, and transmitting the positioning assistance information to the terminal, the terminal according to the positioning assistance information and the The next measurement base station performs the ranging process.
  • the acquiring the positioning assistance information of the measurement base station that is not performing the next ranging process may be that the next unexecuted ranging process is acquired by the back-end network interaction.
  • the positioning assistance information of the base station is measured.
  • the previous measurement base station may acquire the positioning auxiliary information of the next measurement base station through the back-end network and send the positioning auxiliary information to the terminal, and the terminal according to the positioning auxiliary information
  • the next measurement base station performs the ranging process until the last measurement base station completes the ranging process with the terminal.
  • Case c If the positioning assistance information of all the measurement base stations is not carried in the MOB-PAG-ADV message, but the positioning assistance information of the measurement base station, such as the positioning assistance information of the first measurement base station, the terminal follows the positioning.
  • the auxiliary information and the first measurement base station perform a ranging process. After the first measurement base station is successfully ranging, the first measurement base station sends the positioning assistance information of the next measurement base station to the terminal, and the terminal follows the positioning auxiliary information of the next measurement base station. And performing the ranging process with the next measurement base station; in the embodiment of the present invention, the first measurement base station may acquire the positioning assistance information of the next measurement base station by using the back-end network interaction.
  • the previous measurement base station may acquire the positioning auxiliary information of the next measurement base station through the back-end network and send the positioning auxiliary information to the terminal, and the terminal according to the positioning auxiliary information
  • the next measurement base station performs the ranging process until the last measurement base station completes the ranging process with the terminal.
  • the terminal obtains the measurement result in the measurement process performed by each measurement base station, and the measurement result can be reported.
  • the reporting manner may be:
  • the terminal sends a second message to the measurement base station, for example, the second message is a ranging request.
  • the RNG-REQ message carries the obtained measurement data (for example, round-trip delay RTD, relative delay RD, received signal strength RSSL, or carrier-to-interference and noise ratio CINR) in the RNG-REQ message, and carries the attachment currently attached to the terminal.
  • the measurement base station parses the received RNG-REQ message and finds that the measurement data is carried, the RNG-REQ message is regarded as a positioning result report message; and then the measurement base station sends the parsed measurement value to the attached base station attached to the terminal or sent to the terminal.
  • the relative delay RD also needs to establish a reference base station. If the base station is not specifically designated, the base station can be defaulted to use the attached base station as the reference base station.
  • the terminal sends a second message to the measurement base station, for example, the second message is a ranging request RNG-REQ message, and the RNG-REQ message carries the obtained measurement data, and the attached base station identifier currently attached to the mobile terminal or
  • the paging controller identifier of the terminal further carries an indication information, which explicitly indicates that the RNG-REQ message is a report message triggered by the positioning; then the measurement base station sends the measurement value to the attached base station to which the terminal is attached or sends the information to the terminal. Paging controller.
  • Manner 3 Define a new measurement result report message in the idle state, and carry the obtained measurement data, and also carry the attached base station identifier currently attached by the terminal or the paging controller identifier of the mobile terminal. After receiving the newly defined report message, the measurement base station obtains the measurement result value carried by the base station, and then measures the base station to send the measurement value to the paging controller of the attached base station or terminal to which the terminal is attached.
  • Manner 4 After the terminal completes the measurement of each measurement base station, the measurement result of each measurement base station is recorded, and then the air interface message is sent to the attached base station to which it is currently attached, or sent to the network side gateway or set to the network side for dedicated positioning. Calculated network entity.
  • the transmitted air interface message includes a measurement result list, and the measurement value between the storage terminal and each measurement base station.
  • the specific air interface message may be an RNG-REQ message, or may be a newly defined measurement result report message in an idle state.
  • a reference base station (optionally, the base station that the MS receives the MOB-PAG-ADV message by default, or the target base station that is ready to send the measurement result, or reports the first base station in the base station list) performs the ranging process, and obtains The RTD value of the reference base station is reported to the BSID and the RTD value of the base station; for other measurement base stations, the measured relative delay of the reference base station may be measured and reported to the network;
  • the two BSIDs related to the RD value need to be used (the same type of reporting as the previous base station, if only one reference base station is selected by default, only one base station can be reported.
  • the BSID is simultaneously reported to the network to determine the relative base station for the relative delay.
  • the measurement result may include one or more measurement type results, such as round-trip delay RTD, relative delay RD, received signal strength RSSI, carrier interference noise ratio CINR one or more .
  • the attached base station may return a corresponding response message to the terminal.
  • the attached base station After receiving the reported measurement result, the attached base station can calculate the positioning result of the terminal according to the measurement result. In this way, the network side can locate the terminal in the Idle state without activating the terminal in the Idle state.
  • the attached base station may further send the positioning result to the terminal, for example, the positioning result may be sent to the terminal by using the response message, or a new message may be defined. And sending the positioning result to the terminal by using the newly defined message, and the newly defined message should be a message that the terminal can receive in the Idle state.
  • the measurement base station may calculate the measurement result and report the attached base station and the network to the terminal when the measurement base station determines that the Ranging is successful.
  • the RNG-REQ message sent by the terminal and the measurement base station is carried, and the estimated advance time information corresponding to the measurement base station is notified; or the terminal reports the selected measurement base station and the corresponding estimated advance time information to the attached base station, and the attached base station separately notifies each measurement.
  • Base station The RNG-REQ message sent by the terminal and the measurement base station is carried, and the estimated advance time information corresponding to the measurement base station is notified; or the terminal reports the selected measurement base station and the corresponding estimated advance time information to the attached base station, and the attached base station separately notifies each measurement.
  • the BSID may be a complete BSID, or may be a BS index value defined by the network for each BS.
  • the BS can construct a correspondence table of BSID and BS index values by broadcasting a message broadcast.
  • the terminal receives the first message sent by the attached base station (e.g.
  • the location rejection is returned to the attached base station, for example, the indication of the location rejection is carried by the RNG-REQ message.
  • the embodiment of the present invention may also pass the UL_MAP message. See Example 2 for details.
  • a method for measuring an RTD according to the foregoing embodiment of the present invention a wireless access system embodiment, including a base station and a wireless terminal, where:
  • the base station is configured to send a first message, where the first message carries positioning indication information and a terminal identifier;
  • the wireless terminal is configured to receive the first message, parse the received first message, and include the terminal identifier corresponding to the terminal, select the measurement base station to perform a ranging process, and obtain the terminal and each measurement according to the ranging process. Round trip delay RTD value between base stations.
  • the first message may further include a candidate measurement base station list, where the candidate measurement base station list specifies a candidate measurement base station, and further includes an estimated advance time corresponding to the requirement that the terminal trigger the ranging process to each measurement base station. .
  • the base station may further request, by the measurement base station in the candidate measurement base station list, the CDMA codeword that triggers the ranging, and the CDMA codeword returned by the measurement base station is also
  • the first message (such as a MOB-PAG-ADV message) is carried to the terminal.
  • the first message may further include a physical resource allocated by the corresponding measurement base station for ranging, in addition to the foregoing measurement base station CDMA codeword.
  • the first message may further include positioning assistance information, where the positioning assistance information may include a CDMA codeword, and/or measure an air interface resource allocated by the base station.
  • the carrying location assistance information may be that all or part of the candidate measurement in the candidate measurement base station list is carried in the first message.
  • the positioning assistance information allocated by the base station may be: only one positioning auxiliary information allocated by the measurement base station may be included in the embodiment of the present invention, which may save air interface resources.
  • the positioning assistance information allocated by only one measurement base station may be The positioning assistance information allocated by any of the measurement base stations in the candidate measurement base station list may of course be the positioning assistance information allocated by the base station that transmits the current first message. If there is no candidate measurement base station list in the first message, the positioning assistance information may be positioning assistance information allocated by the base station that sends the current first message, and the base station may be an attached base station.
  • the terminal may further select all or part of the candidate measurement base stations from the candidate measurement base station list as the measurement base station, and trigger the ranging process according to the estimated advance time and the selected measurement base station to obtain an RTD value.
  • another embodiment of the wireless access system includes a base station and a wireless terminal, where: the base station is configured to send a first message, where the first message carries a positioning indication The information and the terminal identifier; the wireless terminal, configured to receive the first message, and parse the received first message to include the terminal identifier corresponding to the terminal, and select the measurement base station to obtain the measured value.
  • the first message may further carry the positioning interaction identifier information for identifying the positioning process.
  • the second message further carries the positioning interaction identifier information used to identify the positioning process.
  • the embodiment of the present invention further provides a base station, which is shown in FIG. 2, and includes: a first instruction unit, configured to send a broadcast message to the terminal, and carry the positioning indication information and the terminal identifier;
  • a first ranging unit configured to perform a ranging process with the terminal
  • the first reporting unit is configured to: when determining that the ranging with the terminal reaches a successful state, calculate an RTD and report the attached base station to the terminal, the network side gateway, or the network entity dedicated to the positioning calculation set on the network side.
  • An embodiment of the present invention further provides another base station, and a schematic structural diagram thereof is shown in FIG. 5, including:
  • a third instruction unit configured to send a first message to the terminal, and carry the positioning indication information and the terminal identifier
  • the third obtaining unit is configured to obtain a measured value.
  • the terminal further includes:
  • the third reporting unit reports the measurement value obtained by the third obtaining unit to the attached base station of the terminal, the network side gateway, or the network entity dedicated to the positioning calculation set on the network side.
  • the embodiment of the present invention further provides a wireless terminal, and a schematic structural diagram thereof is shown in FIG. 3, which includes:
  • a second instruction unit configured to receive a broadcast message that is sent by the base station and carries the positioning indication information and the terminal identifier
  • a second ranging unit configured to select a measurement base station; and perform a ranging process with the selected measurement base station to obtain the RTD value;
  • a second reporting unit configured to report an RTD value obtained by each measurement base station during a ranging process Give the network side.
  • An embodiment of the present invention further provides another wireless terminal, and a schematic structural diagram thereof is shown in FIG. 6 , including: a fourth instruction unit and a fourth acquiring unit;
  • the fourth instruction unit is configured to receive the carrying location indication information and the terminal identifier first message sent by the base station, and after parsing that the received first message includes the terminal identifier corresponding to the terminal, notify the fourth acquiring unit;
  • the fourth acquiring unit is configured to select a measurement base station to obtain a measurement value according to the positioning indication information.
  • the fourth reporting unit is configured to report the obtained measurement value to the network side.
  • the method and the system provided by the embodiment of the present invention can perform the positioning of the terminal in the Idle state by transmitting the broadcast message carrying the positioning indication information without activating the terminal, and solving the problem of the base station in the Idle state in the prior art.
  • the terminal When the terminal is positioning, the terminal must be activated first.
  • the terminal itself may trigger the positioning process in the Idle state, and the positioning process triggered by the terminal itself in the I dle state may be performed by The following two options are implemented:
  • Step 11 The terminal in the Id l e state sends a trigger message to the network side to trigger the terminal positioning process in the I d l e state.
  • the trigger message may be an RNG-REQ message, and a cell is added to the RNG-REQ message, indicating that the message is used to trigger a terminal positioning process in the I d 1 e state.
  • a special type of CDMA codeword set may be redefined.
  • the terminal sends the CDMA codeword in the set to the network side for performing a Ranging process
  • the network side It is known that the terminal is currently initiating a positioning ranging process.
  • a trigger message may be newly defined, and the terminal in the Id le state may send the message to the network side, where the network side is triggered to trigger the terminal in the Idle state without being activated.
  • the terminal performs a positioning and ranging process.
  • the steps 12, 13, and 14 are similar to the steps 1, 2, and 3 in the first and second embodiments.
  • the base station sends the first message and the subsequent process to perform the ranging process in the Idle state, and the process is not repeated here. description.
  • Step 15 After receiving the reported RTD measurement result, the attached base station calculates the terminal positioning result and sends the result to the terminal.
  • the attached base station After receiving the reported RTD measurement result, the attached base station can calculate the positioning result of the terminal according to the RTD measurement result. In this way, the network side can locate the terminal in the Idle state without activating the terminal in the Idle state.
  • the method for sending the positioning result to the terminal may be as follows: Method 1. Define a special message, and send the positioning result to the terminal by using the newly defined message after calculating the positioning result. And allows the terminal to receive this message in idle state.
  • Method 2 may be through a response message, such as may be sent to the terminal through the RNG-RSP message.
  • the terminal may be further included in the MOB-PAG-ADV message, and the terminal is only required to receive the positioning result in the MOB-PAG-ADV message.
  • the positioning process triggered by the terminal in the Idle state can be completed without activating the terminal in the Idle state.
  • the terminal in the Id le state and the current measurement base station perform a ranging process
  • the terminal in the I d 1 e state can only transmit the RNG-REQ message and the CDMA codeword.
  • the RNG-REQ message carries information indicating that the ranging process is used for ranging positioning and/or the anchor paging controller identifier to which the mobile terminal currently belongs. Or attach the base station identifier.
  • the present invention is implemented For example, if the RTD is calculated by the terminal, the RTD value of the current measurement base station may also be carried in the MG-REQ message.
  • all RTDs are summarized in the anchor paging controller or attached to the base station, and then the positioning calculation can be performed. The network then sends the results of the positioning calculation to the terminal.
  • the terminal may select a CDMA codeword to complete the ranging procedure of the first base station and redefine a special type of CDMA codeword set, and then the first base station and its The neighboring base station negotiates to acquire the corresponding physical resource and the allocated CDMA codeword, so as to complete the ranging process with other base stations according to a similar procedure as the ranging process triggered by the network side.
  • Method 1 for the network to send the positioning calculation result to the terminal If the terminal determines that the current measurement base station is the last base station to be scanned, the terminal may indicate in the RNG-REQ message, and after the network obtains the indication, the terminal may perform positioning. The calculation process, and after obtaining the final positioning result, the RNG-RSP message sent by the base station is sent to the terminal.
  • the method of sending the positioning calculation result to the terminal by the network 2 Defining a special message, the network sends the positioning result to the terminal through the newly defined message after calculating the positioning result, and allows the terminal to receive the message in the idle state.
  • Method for transmitting the positioning calculation result to the terminal by the network 3 The terminal is included again in the MOB-PAG-ADV message, and the terminal is only required to receive the positioning result in the MOB-PAG-ADV message.
  • a special type of CDMA codeword set may be redefined according to the problem of positioning delay.
  • the terminal sends the CDMA codeword in the set to perform a Ranging process
  • the network side knows the terminal.
  • the method for initiating the location ranging is equivalent to carrying the ranging positioning indication information in the RNG-REQ message. If the terminal sends the special type of CDMA codeword to the network side, the RNG-REQ message may not be used. Carrying the ranging positioning indication information.
  • the terminal sets the next measurement base station identifier. It is an optional step to tell the network in the RNG-REQ message; or, the next measurement base station can be determined by the network, but whether the ranging process is initiated by the terminal), the first measurement base station locates the next measurement base station
  • the auxiliary information is sent to the terminal; the auxiliary information is alternately located between the first measurement base station and the next measurement base station through the back end network.
  • the previous measurement base station sends the positioning assistance information of the next base station to the terminal after the ranging process is successful, until the last measurement base station completes the ranging process with the terminal.
  • the network side needs to notify the terminal of the positioning result.
  • the terminal also puts the label of the positioning purpose in the process of initiating the ranging Ranging process, so that the network side may not allocate the CID to the terminal after the positioning and ranging is successful. Wait for resources and notify the terminal to locate the results.
  • the solution of the present invention is mainly embodied in how to implement the positioning process of the terminal in an idle state, including the positioning triggered by the network side and the positioning triggered by the terminal itself.
  • the measurement of the RTD in the positioning process involved in the above embodiments is performed based on the terminal side. If the measurement of the RTD is completed by the base station side, the positioning scheme of the terminal in the idle state is also applicable to the present invention. The only difference is that the specific RTD measurement process is different, which in turn affects the RTD acquisition and notification process.
  • the spirit and scope of the invention Thus, it is intended that the present invention cover the modifications and modifications of the invention.

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Description

一种测量往返时延的方法及系统
技术领域
本发明涉及无线通信领域,尤其涉及无线系统中的一种测量往返时延 ( Round Trip Delay, RTD ) 的方法和相应的无线接入系统。 背景技术
在无线通信系统中, 为了在终端和网络之间维护无线通信链路的质 量,需要一种机制来调整终端和网络的相对时间、发送功率和频偏等参数, 这一过程被称为测距 ( Ranging ) 。 在正交频分多址接入 ( Orthogonal Frequency Division Multi Access , OFDMA ) 系统中 , Ranging有三种: 1 )基于竟争的初始 Ranging;
2 ) 周期性的 Ranging;
3 ) 切换过程中的 Ranging。
三种 Ranging方式的最基本区别在于所用的 CDMA码来自于不同的 集合。
初始 Ranging作用于网络初始接入的时候, 此时终端已经同步上了网 络的下行数据, 并且得到了上行的一些配置参数, 但是需要随机的选择接 入时隙以及 CDMA码字;
周期性的 Ranging目的在于检测无线链路的状况改变, 一旦无线链路 的状况发生变化, 就需要作出相应的参数调整;
切换过程中的 Ranging和初始 Ranging类似,但有可能目标基站( Base Station , BS ) 已经为终端预先分配好了相关 Ranging资源。
在目前 WiMax系统中, 对于基于竟争的初始 Ranging描述如下: 1、 终端同步上 BS的下行数据, 解析 BS广播的上行传输参数, 然后 随机选择一个 Ranging时隙和 CDMA码字, 发送给 BS。
2、 BS收到 CDMA码字以后, 无法判断是哪个终端发送的 CDMA码 字, 只有广播一个 RNG-RSP (测距响应)消息。 这个 RNG-RSP消息中包 含该 CDMA码字, 以及接收到该 CDMA码字的 Ranging时隙。 这样, 终 端就可以依据这些信息来判断这个 RNG-RSP 是否是针对自 己的。 RNG-RSP消息中还包括时间、功率以及频偏上的一些调整信息和 Ranging 的状态信息。
3、如果 RNG-RSP消息中指示 Ranging的状态信息是继续( continue ) , 终端需要按照 RNG-RSP 消息中的调整信息进行调整, 然后继续进行 CDMA码字的发送。
4、如果 RNG-RSP消息中指示 Ranging的状态信息是成功( success ) , BS 同时还会在发送的 UL-MAP (上行资源对应表) 消息中携带 CDMA- Allocation-IE ( CDMA分配信息元)。 CDMA- Allocation-IE的作用 在于指示一个物理资源, 终端可以用于发送 RNG-REQ (测距请求)消息。
5、 BS在收到 RNG-REQ消息以后就用 RNG-RSP作为响应, 这次的
RNG-RSP 消息中包含了一个分配给终端的基本连接标识 (CID ) 。 初始 Ranging就结束了。
6、 终端维护一个时钟, 终端必须在此时钟到期前收到 RNG-RSP。 Ranging过程包含了 RTD的测量。 RTD的测量在网络接入、 切换以 及位置业务(LoCation Services, LCS )定位中有很重要的意义。 网络接入 和切换的时候, 如果没有测量出 RTD, 就无法做到上行数据的传输。 因为 一个 BS下可能有 4艮多终端, 而每一个终端和 BS之间的距离都是不一样 的, 所以每个终端信号到达 BS 的时刻都不一样。 于是, 需要终端和 BS 都知道终端和 BS之间当前的 RTD, 这样两端的时间轴才能自由换算。 在 LCS定位的时候, RTD是一个很重要的参数。它定义了终端到 BS的距离。 在观察到达时间差 ( Observed Time Difference Of Arrival, OTDOA ) 定位 方式中, 测量出 RTD就可以得到终端到两个 BS的距离差, 从而计算出终 端当前的位置。 在小区标识 ( Cell-ID ) /相对时间差 ( Relative Time Difference, RTD )定位方式中, 在确定了终端所在的小区以后, 如果知道 了 RTD就能把定位区域从一个小区缩小到一个到 BS等距的圓环上,达到 了增加定位精度的效果。
上述现有技术中, 对于空闲 (Idle ) 状态下的终端的定位需要先激活 该终端才以实现定位, 使得对于空闲状态下的终端定位过程比较复杂。 发明内容
本发明的实施例提供一种测量 RTD 的方法及系统, 筒单实现空闲状 态下的终端的定位。
本发明实施例提供的一种测量往返时延的方法, 包括:
基站发送第一消息, 所述第一消息中携带定位指示信息以及终端标 识;
终端解析出所述第一消息中包含有自身对应的终端标识后, 选择测量 基站执行测距过程;
根据所述测距过程获得终端与各测量基站之间的往返时延 RTD值。 本发明实施例提供的一种无线接入系统, 包括:
基站, 用于发送第一消息, 所述第一消息中携带定位指示信息以及终 端标识;
无线终端, 用于接收所述第一消息, 解析出接收的第一消息中包含有 自身对应的终端标识后, 选择测量基站执行测距过程, 根据所述测距过程 获得终端与各测量基站之间的往返时延 RTD值。
本发明实施例提供的一种基站, 包括:
第一指令单元, 用于向终端发送第一消息, 携带定位指示信息以及终 端标识; 第一测距单元, 用于与终端交互执行测距过程。
本发明实施例提供的一种无线终端, 包括: 第二指令单元和第二测距 单元;
所述第二指令单元, 用于接收基站发送的携带定位指示信息以及终端 标识第一消息, 解析出接收的所述第一消息中包含有自身对应的终端标识 后, 通知第二测距单元;
所述第二测距单元, 用于根据所述定位指示信息选择测量基站; 并与 选择出的测量基站执行测距过程获得所述 RTD值。
本发明实施例提供的一种获取测量值的方法, 包括:
基站发送第一消息, 所述第一消息中携带定位指示信息以及终端标 识;
终端解析出所述第一消息中包含有自身对应的终端标识后, 选择测量 基站获得测量值。
本发明的实施例提供的一种无线接入系统, 包括:
基站, 用于发送第一消息, 所述第一消息中携带定位指示信息以及终 端标识;
无线终端, 用于接收所述第一消息, 解析出接收的第一消息中包含有 自身对应的终端标识后, 选择测量基站获得测量值。
本发明的实施例提供的一种基站, 包括:
第三指令单元, 用于向终端发送第一消息, 携带定位指示信息以及终 端标识;
第三获取单元, 用于获得测量值。
本发明的实施例提供的一种无线终端, 包括: 第四指令单元和第四获 取单元;
所述第四指令单元, 用于接收基站发送的携带定位指示信息以及终端 标识第一消息, 解析出接收的所述第一消息中包含有自身对应的终端标识 后, 通知第四获取单元;
所述第四获取单元, 用于根据所述定位指示信息选择测量基站获得测 量值。
本发明实施例提供的测量 RTD 的方法与系统, 以及获取测量值的方 法及系统, 通过附着基站向终端发送广播消息携带定位指示信息, 可实现 Idle状态下的终端的定位, 解决了现有技术中基站对 Idle状态下的终端进 行定位时, 必须先激活该终端的问题。 附图说明
图 1为本发明实施例实现不激活空闲状态下终端时进行 RTD测量的 信令流程示意图;
图 2为本发明实施例提供的基站功能结构示意图;
图 3为本发明实施例提供的无线终端功能结构示意图;
图 4为本发明实施例实现不激活空闲状态下终端时获取测量值的信令 流程示意图;
图 5为本发明实施例提供的另一种基站功能结构示意图;
图 6为本发明实施例提供的另一种无线终端功能结构示意图。 具体实施方式
本发明实施例提供的测量 RTD的方法包括:
由基站发送第一消息, 在第一消息中携带定位指示信息以及终端标 识; 终端解析出接收的第一消息中包含有自身对应的终端标识后, 选择测 量基站执行测距过程; 根据与测量基站之间的测距过程获得终端与测量基 站之间的往返时延 RTD值。
下面用具体实施例结合附图进行详细描棕述。
一种测量 RTD的方法的实施例 1: 基站向终端发送的第一消息为广播消息, 例如基站向终端发送寻呼广 播 MOB-PAG-ADV消息, 在该消息中携带定位指示信息和终端标识, 启 动对空闲状态下的终端进行 RTD测量。
参见图 1 ,为本发明实施例不激活空闲状态下终端时进行 RTD测量的 信令流程示意图; 具体包括:
1、 基站向终端发送 MOB-PAG-ADV消息, 携带定位指示信息和终端 标识。
本发明实施例中, 当需要测量空闲状态下终端的 RTD值时, 基站向 终端发送 MOB-PAG-ADV消息, 携带定位指示信息和终端标识。 较佳的, 本发明实施例中, 可以由附着基站向终端发送 MOB-PAG-ADV消息, 携 带定位指示信息和终端标识, 所述的附着基站是指 Idle状态下终端所在的 信号最好的基站, 称为 preferred基站, 当 Idle状态下终端激活时, 该附着 基站作为终端的服务基站。 例如: 在 MOB-PAG-ADV消息中携带终端标 识, 并在 MOB-PAG-ADV消息中的 Action (触发动作指示) 域中携带定 位指示信息。 本发明实施例中, 定位指示信息可以是指示具体的定位类型 或指定扫描基站数目等, 例如指示定位类型为 Cell-RTD 定位或 OTDOA 定位或是其它定位类型; 或进一步的, 定位指示信息还可以包括定位精度 信息等。
可选地, 本发明实施例中, 在 MOB-PAG-ADV消息中还可以携带一 个候选测量基站列表, 指定候选的测量基站, 进一步的, 还可以包括要求 终端首次发送 CDMA码字给对应测量基站触发测距过程的对应预估提前 时间。
可选地, 上述候选测量基站对应的预估提前时间信息, 可以由附着基 站向每个候选测量基站直接请求获得, 或者由接入网网关转接请求获得。
可选地, 上述候选测量基站对应的预估提前时间信息, 可以由附着基 站自主确定。 可选地, 本发明实施例中, 附着基站还可以向候选测量基站列表中的 测量基站请求触发测距的 CDMA码字, 并将测量基站返回的 CDMA码字 也通过第一消息 (本实施例 1 中为 MOB-PAG-ADV消息)携带发送给终 端。
可选地, 本发明实施例中, 在 MOB-PAG-ADV消息中除了包括上述 的测量基站 CDMA码字外还可以进一步包括对应的测量基站为测距分配 的物理资源。
可选地, 本发明实施例中, 在 MOB-PAG-ADV消息中还可以携带定 位辅助信息, 所述定位辅助信息可以包括 CDMA码字、 和 /或测量基站分 配的空口资源。 这里, 若所述 MOB-PAG-ADV消息中同时包括有候选测 量基站列表, 则所述携带定位辅助信息可以是在 MOB-PAG-ADV消息中 携带有所述的候选测量基站列表中全部或部分候选测量基站分配的定位 辅助信息, 本发明实施例中, 也可以是只包括一个测量基站分配的定位辅 助信息, 这样可以节省空口资源, 这里, 所述只包括一个测量基站分配的 定位辅助信息可以是所述候选测量基站列表中任——个测量基站分配的 定位辅助信息, 当然也可以是包括发送当前 MOB-PAG-ADV消息的基站 分配的定位辅助信息。 若所述 MOB-PAG-ADV消息中没有候选测量基站 列表, 则所述定位辅助信息可以是下发当前 MOB-PAG-ADV消息的基站 分配的定位辅助信息, 所述基站可以是附着基站。
2、 终端接收到携带定位指示信息和终端标识的 MOB-PAG-ADV消息 后, 如果解析出 MOB-PAG-ADV消息中包含有自身对应的终端标识, 则 可以选择测量基站, 并向测量基站发送随机选择的一个 CDMA码字, 启 动测距过程。 本发明实施例中, 所述终端选择测量基站可以是根据接收到 的 MOB-PAG-ADV消息中携带的定位指示信息来选择测量基站, 如可以 选择附着基站作为测量基站, 也可以是选择多个基站作为测量基站。
可选的, 本发明实施例中, 选择测量基站也可以是终端从信号强度大 于预先设定门限值的基站中选择出测量基站并启动测距过程, 如可以选择 附着基站作为测量基站, 也可以是选择多个基站作为测量基站。
可选的, 本发明实施例中, 若所述接收到的 MOB-PAG-ADV 消息中 还携带有候选测量基站列表, 则终端可以从所述候选测量基站列表中选择 全部或部分基站作为测量基站, 并分别向每一个测量基站发送随机选择的 一个 CDMA 码字, 启动测距过程; 进一步的, 若所述接收到的 MOB-PAG-ADV消息中除了携带有候选测量基站列表,还包括要求终端首 次发送 CDMA码字给对应测量基站触发测距过程的对应预估提前时间, 则终端应该在所述预估提前时间内向每一个测量基站发送随机选择的一 个 CDMA码字, 启动测距过程。
可选的, 本发明实施例中, 若所述接收到的 MOB-PAG-ADV消息中 还携带有 CDMA码字,则终端就向测量基站发送对应的所述 CDMA码字, 启动测距过程。
可选的 , 本发明 实施例 中 , 如果终端从附着基站发送的 MOB-PAG-ADV消息中已经获得了测量基站对应的 CDMA码字以及为测 距分配的物理资源, 就利用获得的 CDMA码字和为测距分配的物理资源 与对应的测量基站执行测距过程。
可选的, 本发明实施例中, 若所述接收到的 MOB-PAG-ADV 消息中 携带有定位辅助信息, 则终端按照所述定位辅助信息同相应测量基站执行 测距过程。 该过程具体可分为如下几种情况:
情况 a、若所述接收到的 MOB-PAG-ADV消息中携带有候选测量基站 列表中全部候选测量基站的定位辅助信息, 则终端按照所述定位辅助信息 同所对应的测量基站执行测距过程。
情况 b、若所述接收到的 MOB-PAG-ADV消息中携带有候选测量基站 列表中部分候选测量基站分配的定位辅助信息, 则终端按照所述定位辅助 信息同所对应的部分测量基站执行测距过程, 并由所述部分测量基站中的 任——个测量基站获取下一未执行测距过程的测量基站的定位辅助信息 并将其发送给终端, 终端按照所述定位辅助信息和所述下一测量基站执行 测距过程; 本发明实施例中, 所述获取下一未执行测距过程的测量基站的 定位辅助信息可以是通过后端网络交互来获取所述下一未执行测距过程 的测量基站的定位辅助信息。
后续过程中, 前一测量基站在测距过程成功后, 可以通过后端网络交 互获取下一测量基站的定位辅助信息并将所述定位辅助信息发送给终端, 终端按照所述定位辅助信息同所述下一测量基站执行测距过程, 一直到最 后一个测量基站同终端完成了测距过程。
情况 c、如果 MOB-PAG-ADV消息中携带的不是所有的测量基站的定 位辅助信息, 而是某一个测量基站的定位辅助信息, 如第一测量基站的定 位辅助信息, 那么终端按照所述定位辅助信息和第一测量基站执行测距过 程, 第一测量基站测距成功后, 第一测量基站把下一测量基站的定位辅助 信息发送给终端, 终端按照所述下一测量基站的定位辅助信息和所述下一 测量基站执行测距过程; 本发明实施例中, 所述第一测量基站可以通过后 端网络交互来获取所述下一测量基站的定位辅助信息。
后续过程中, 前一测量基站在测距过程成功后, 可以通过后端网络交 互获取下一测量基站的定位辅助信息并将所述定位辅助信息发送给终端, 终端按照所述定位辅助信息同所述下一测量基站执行测距过程, 一直到最 后一个测量基站同终端完成了测距过程。
3、 终端与各测量基站在 Ranging过程中获得 RTD测量结果并上报。 具体上报方式例如:
方式一: 终端向测量基站发送第二消息, 例如, 第二消息为测距请求 RNG-REQ消息, 在 RNG-REQ消息中携带获得的 RTD测量数据, 还携带 有终端当前所附着的附着基站标识, 或者携带终端的寻呼控制器标识。 测 量基站解析接收的 RNG-REQ 消息发现携带有测量数据, 则认为此 RNG-REQ消息是定位结果上报消息; 然后测量基站将解析出的 RTD值发 送给终端所附着的附着基站或者发送给终端的寻呼控制器。
方式二: 终端向测量基站发送第二消息, 例如, 第二消息为测距请求 RNG-REQ消息, 在 RNG-REQ消息中除了携带获得的 RTD测量数据, 以 及携带终端当前所附着的附着基站标识或终端的寻呼控制器标识外, 还携 带一个指示信息, 显式地表明该 RNG-REQ消息是由于定位触发的上报消 息; 然后测量基站将 RTD值发送给终端所附着的附着基站或者发送给终 端的寻呼控制器。
方式三:定义一种新的空闲状态下的 RTD上报消息,携带获得的 RTD 测量数据, 还携带有终端当前所附着的附着基站标识或携带终端的寻呼控 制器标识。 测量基站接收到该新定义的上报消息后, 获取其携带的 RTD 测量结果值, 然后测量基站将 RTD值发送给终端所附着的附着基站或者 终端的寻呼控制器。
方式四: 终端完成对各测量基站的测量后, 记录每个测量基站的测量 结果, 然后发送空口消息给其所附着的附着基站, 或者发送给网络侧网关 或设置于网络侧的专用于定位计算的网络实体。 在发送的空口消息中包含 一个测量结果列表, 存储终端与各测量基站之间的 RTD值。 具体的空口 消息可以是 RNG-REQ消息, 也可以是新定义的空闲状态下的 RTD上报 消息。
4、 附着基站接收到上报的 RTD测量结果后, 返回相应响应消息给终 端。
附着基站在收到上报的 RTD测量结果后, 根据所述的 RTD测量结果 就可以计算出终端的定位结果。 这样, 网络侧就可以在不激活 Idle状态下 终端的情况下实现对 Idle状态下终端的定位。
可选的, 本发明实施例中, 附着基站还可以把所述定位结果发送给终 端, 如可以通过所述的响应消息把所述定位结果发给所述终端, 也可以是 新定义一个消息, 并通过该新定义的消息把定位结果发送给终端, 该新定 义的消息应该是 Idle状态下终端可以接收的消息。
可选地, 在终端和测量基站之间完成了预估提前时间协商的场景中, 还可以由各测量基站在判断出 Ranging达到成功状态时, 计算出 RTD并 报告给终端的附着基站、 网络侧网关或设置于网络侧的专用于定位计算的 网络实体。
终端和测量基站之间实现预估提前时间协商的方式有很多, 例如: 由 终端和测量基站发送的 RNG-REQ消息携带, 通知测量基站对应的预估提 前时间信息; 或者终端将选择的测量基站及对应的预估提前时间信息上报 给附着基站, 由附着基站分别通知各测量基站。
特别地, 如果预估提前时间信息本身就是由附着基站向每个候选测量 基站请求获得的, 则不需要再与各测量基站之间进行预估提前时间的协 商。
在图 1 所示流程中, 终端接收附着基站发送的第一消息 (如 MOB-PAG-ADV消息)后, 如果自身不支持定位或不希望被定位, 则向附 着基站返回定位拒绝,例如,通过 RNG-REQ消息携带指示定位拒绝指示。
除了实施例 1 中的用寻呼广播 MOB-PAG-ADV消息外, 本发明实施 例还可以通过 UL_MAP消息。具体参见一种测量 RTD的方法的实施例 2。
一种测量 RTD 的方法的实施例 2: 基站向终端发送上行资源对应表 UL-MAP消息, 在该消息中携带定位指示信息和终端标识, 启动对空闲状 态下的终端进行 RTD测量。
本发明实施例中, 当需要测量空闲状态下终端的 RTD值时, 基站向 终端发送 UL-MAP消息, 携带定位指示信息和终端标识。 较佳的, 本发明 实施例中, 可以由附着基站向终端发送 UL-MAP消息,携带定位指示信息 和终端标识。
UL-MAP 消息中携带的定位指示信息可以是指示具体的定位类型或 指定扫描基站数目等, 例如指示定位类型为 Cell-RTD定位或 OTDOA定 位或是其它定位类型; 或进一步的, 定位指示信息还可以包括定位精度信 息等。 UL-MAP消息中可以是用终端的 MAC地址, 或者是 MAC地址的 哈希函数值来标识指示定位的终端; 由 UL-MAP 消 息 中 的 CDMA-Allocation-IE指配终端发送最终测量结果的物理资源。
可选地, 本发明实施例中,在 UL-MAP消息中还可以携带一个候选测 量基站列表, 指定候选的测量基站, 进一步的, 还可以包括要求终端首次 发送 CDMA码字给对应基站触发测距过程的预估提前时间。 可选地, 还 可以包括通过与终端交互其它现有信令指配终端发送最终测量结果的物 理资源。
可选地, 上述候选测量基站对应的预估提前时间信息, 可以由附着基 站向每个候选测量基站直接请求, 或者由接入网网关转接请求。
可选地, 上述候选测量基站对应的预估提前时间信息, 可以由附着基 站自主确定。
可选地, 本发明实施例中, 附着基站还可以向候选测量基站列表中的 测量基站请求触发测距的 CDMA码字, 并将测量基站返回的 CDMA码字 也通过第一消息 (本实施例 2中为 UL-MAP消息)携带发送给终端。
可选地, 本发明实施例中,在 UL-MAP消息中除了包括上述的测量基 站 CDMA码字外还可以进一步包括对应的测量基站为测距分配的物理资 源。
可选地, 本发明实施例中,在 UL-MAP消息中还可以携带定位辅助信 息, 所述定位辅助信息可以包括 CDMA码字、 和 /或测量基站分配的空口 资源。 这里, 若所述 UL-MAP消息中同时包括有候选测量基站列表, 则所 述携带定位辅助信息可以是在 UL-MAP 消息中携带有所述的候选测量基 站列表中全部或部分候选测量基站分配的定位辅助信息, 本发明实施例 中, 也可以是只包括一个测量基站分配的定位辅助信息, 这样可以节省空 口资源, 这里, 所述只包括一个测量基站分配的定位辅助信息可以是所述 候选测量基站列表中任——个测量基站分配的定位辅助信息, 当然也可以 是包括发送当前 UL-MAP 消息的基站分配的定位辅助信息。 若所述 UL-MAP消息中没有候选测量基站列表, 则所述定位辅助信息可以是下发 当前 UL-MAP 消息的基站分配的定位辅助信息, 所述基站可以是附着基 站。
其余步骤与上述实施例 1中的步骤 2、 3、 4类似, 在此不重复描述。 本发明实施例还提供一种获取测量值的方法, 具体如下:
基站向终端发送的第一消息为广播消息, 例如基站向终端发送寻呼广 播 MOB-PAG-ADV消息, 在该消息中携带定位指示信息和终端标识, 指 示空闲状态下的终端进行测量。
参见图 4, 为本发明实施例不激活空闲状态下终端时进行测量的信令 流程示意图; 具体包括:
1、 基站向终端发送 MOB-PAG-ADV消息, 携带定位指示信息和终端 标识。
本发明实施例中, 当需要空闲状态下终端的测量值 (本发明实施例中, 所述测量值可以为往返时延 RTD、 相对时延 RD、 接受信号强度 RSSI、 或 载波干扰噪声比 CINR 等中的一个或多个)时, 基站向终端发送 MOB-PAG-ADV消息, 携带定位指示信息和终端标识, 进一步的, 本发明 实施例中, 所述 MOB-PAG-ADV消息中还可以携带测量数据类型。 定位 指示信息包含定位类型信息、 定位精度信息、 扫描基站数目信息的一个或 任一组合, 定位指示信息中还可以包括测量数据类型。 较佳的, 本发明实 施例中, 可以由附着基站向终端发送 MOB-PAG-ADV消息, 携带定位指 示信息和终端标识和测量数据类型, 所述的附着基站是指 Idle状态下终端 所在的信号最好的基站, 或者终端接收 MOB-PAG-ADV消息时所接入的 基站, 称为 preferred基站。 例如: 在 MOB-PAG-ADV消息中携带终端标 识, 并在 MOB-PAG-ADV消息中的 Action (触发动作指示) 域中携带定 位指示信息。 本发明实施例中, 定位指示信息可以是指示具体的定位类型 或指定扫描基站数目等, 例如指示定位类型为 Cell-RTD 定位或 OTDOA 定位或是其它定位类型; 或进一步的, 定位指示信息还可以包括定位精度 信息等; 或进一步的, 定位指示信息还可以包括测量数据类型 (例如, 往 返时延 RTD, 相对时延 RD, 接受信号强度 RSSI, 载波干扰噪声比 CINR 等中的一个或多个) 等。
可选地, 如果 Action域中没有包含测量数据类型, 本发明实施例中, 在 MOB-PAG-ADV消息中还可以携带测量数据类型, 指定终端需要测量 的具体数据类型。
可选地, 本发明实施例中, 在 MOB-PAG-ADV消息中还可以携带一 个候选测量基站列表, 指定候选的测量基站, 进一步的, 还可以包括要求 终端首次发送 CDMA码字给对应测量基站触发测距过程的对应预估提前 时间。
可选地, 上述候选测量基站对应的预估提前时间信息, 可以由附着基 站向每个候选测量基站直接请求获得, 或者由接入网网关转接请求获得。
可选地, 上述候选测量基站对应的预估提前时间信息, 可以由附着基 站自主确定。
可选地, 本发明实施例中, 附着基站还可以向候选测量基站列表中的 测量基站请求触发测距的 CDMA码字, 并将测量基站返回的 CDMA码字 也通过第一消息 (本实施例 3 中为 MOB-PAG-ADV消息)携带发送给终 端。
可选地, 本发明实施例中, 在 MOB-PAG-ADV消息中除了包括上述 的测量基站 CDMA码字外还可以进一步包括对应的测量基站为测距分配 的物理资源。 可选地, 本发明实施例中, 在 MOB-PAG-ADV消息中还可以携带定 位辅助信息, 所述定位辅助信息可以包括 CDMA码字、 和 /或测量基站分 配的空口资源。 这里, 若所述 MOB-PAG-ADV消息中同时包括有候选测 量基站列表, 则所述携带定位辅助信息可以是在 MOB-PAG-ADV消息中 携带有所述的候选测量基站列表中全部或部分候选测量基站分配的定位 辅助信息, 本发明实施例中, 也可以是只包括一个测量基站分配的定位辅 助信息, 这样可以节省空口资源, 这里, 所述只包括一个测量基站分配的 定位辅助信息可以是所述候选测量基站列表中任——个测量基站分配的 定位辅助信息, 当然也可以是包括发送当前 MOB-PAG-ADV消息的基站 分配的定位辅助信息。 若所述 MOB-PAG-ADV消息中没有候选测量基站 列表, 则所述定位辅助信息可以是下发当前 MOB-PAG-ADV消息的基站 分配的定位辅助信息, 所述基站可以是附着基站。 本发明实施例中, 也可 以是所有的测量基站都分配一致的定位辅助信息, 这样可以让终端只需要 发送一次 CDMA码字, 网络侧的各个测量基站就可以互相交互获得相对 时延 RD值。
2、 终端接收到携带定位指示信息和终端标识的 MOB-PAG-ADV消息 后, 如果解析出 MOB-PAG-ADV消息中包含有自身对应的终端标识, 则 可以选择测量基站, 并向测量基站发送随机选择的一个 CDMA码字, 启 动测量过程。 本发明实施例中, 所述终端选择测量基站可以是根据接收到 的 MOB-PAG-ADV消息中携带的定位指示信息来选择测量基站, 如可以 选择附着基站作为测量基站, 也可以是选择多个基站作为测量基站。
在测量相对时延 RD、 接受信号强度 RSSI或是载波干扰噪声比 CINR 的时候, 可以检测各个测量基站的下行信号以获得测量基站的测量值。
在测量往返时延 RTD值的时候, 可以是针对每一个测量基站进行测 距过程, 以获得所有测量基站的往返时延 RTD值; 也可以是选择一个基 准基站 (MS接收到 MOB-PAG-ADV消息的基站)进行测距过程, 获得该基 准基站的往返时延 RTD值, 对于其他测量基站则采用测量其对基准基站 的相对时延的方式进行测量。
可选的, 本发明实施例中, 选择测量基站也可以是终端从信号强度大 于预先设定门限值的基站中选择出测量基站并启动测量过程, 如可以选择 附着基站作为测量基站, 也可以是选择多个基站作为测量基站。
可选的, 本发明实施例中, 若所述接收到的 MOB-PAG-ADV消息中 还携带有候选测量基站列表, 则终端可以从所述候选测量基站列表中选择 全部或部分基站作为测量基站, 并分别向每一个测量基站发送随机选择的 一个 CDMA 码字, 启动测距过程; 进一步的, 若所述接收到的 MOB-PAG-ADV消息中除了携带有候选测量基站列表,还包括要求终端首 次发送 CDMA码字给对应测量基站触发测距过程的对应预估提前时间, 则终端应该在所述预估提前时间内向每一个测量基站发送随机选择的一 个 CDMA码字, 启动测距过程。
可选的, 本发明实施例中, 若所述接收到的 MOB-PAG-ADV 消息中 还携带有 CDMA码字,则终端就向测量基站发送对应的所述 CDMA码字, 启动测距过程。
可选的 , 本发明 实施例 中 , 如果终端从附着基站发送的 MOB-PAG-ADV消息中已经获得了测量基站对应的 CDMA码字以及为测 距分配的物理资源, 就利用获得的 CDMA码字和为测距分配的物理资源 与对应的测量基站执行测距过程。
可选的, 本发明实施例中, 若所述接收到的 MOB-PAG-ADV消息中 携带有定位辅助信息, 则终端按照所述定位辅助信息同相应测量基站执行 测距过程。 该过程具体可分为如下几种情况:
情况 a、若所述接收到的 MOB-PAG-ADV消息中携带有候选测量基站 列表中全部候选测量基站的定位辅助信息, 则终端按照所述定位辅助信息 同所对应的测量基站执行测距过程。 情况 b、若所述接收到的 MOB-PAG-ADV消息中携带有候选测量基站 列表中部分候选测量基站分配的定位辅助信息, 则终端按照所述定位辅助 信息同所对应的部分测量基站执行测距过程, 并由所述部分测量基站中的 任——个测量基站获取下一未执行测距过程的测量基站的定位辅助信息 并将其发送给终端, 终端按照所述定位辅助信息和所述下一测量基站执行 测距过程; 本发明实施例中, 所述获取下一未执行测距过程的测量基站的 定位辅助信息可以是通过后端网络交互来获取所述下一未执行测距过程 的测量基站的定位辅助信息。
后续过程中, 前一测量基站在测距过程成功后, 可以通过后端网络交 互获取下一测量基站的定位辅助信息并将所述定位辅助信息发送给终端, 终端按照所述定位辅助信息同所述下一测量基站执行测距过程, 一直到最 后一个测量基站同终端完成了测距过程。
情况 c、如果 MOB-PAG-ADV消息中携带的不是所有的测量基站的定 位辅助信息, 而是某一个测量基站的定位辅助信息, 如第一测量基站的定 位辅助信息, 那么终端按照所述定位辅助信息和第一测量基站执行测距过 程, 第一测量基站测距成功后, 第一测量基站把下一测量基站的定位辅助 信息发送给终端, 终端按照所述下一测量基站的定位辅助信息和所述下一 测量基站执行测距过程; 本发明实施例中, 所述第一测量基站可以通过后 端网络交互来获取所述下一测量基站的定位辅助信息。
后续过程中, 前一测量基站在测距过程成功后, 可以通过后端网络交 互获取下一测量基站的定位辅助信息并将所述定位辅助信息发送给终端, 终端按照所述定位辅助信息同所述下一测量基站执行测距过程, 一直到最 后一个测量基站同终端完成了测距过程。
3、 终端在与各测量基站进行的测量过程中获得测量结果, 可以上报 所述测量结果。 本发明实施例中, 所述上报方式可以为:
方式一: 终端向测量基站发送第二消息, 例如, 第二消息为测距请求 RNG-REQ消息, 在 RNG-REQ消息中携带获得的测量数据 (例如, 往返 时延 RTD、相对时延 RD、接受信号强度 RSSL或载波干扰噪声比 CINR ) , 还携带有终端当前所附着的附着基站标识, 或者携带终端的寻呼控制器标 识。 测量基站解析接收的 RNG-REQ消息发现携带有测量数据, 则认为此 RNG-REQ 消息是定位结果上报消息; 然后测量基站将解析出的测量值发 送给终端所附着的附着基站或者发送给终端的寻呼控制器。 相对时延 RD 还需要制定基准基站, 如果不特殊指定基准基站可以默认为以附着基站作 为基准基站。
方式二: 终端向测量基站发送第二消息, 例如, 第二消息为测距请求 RNG-REQ消息, 在 RNG-REQ消息中除了携带获得的测量数据, 以及携 带终端当前所附着的附着基站标识或终端的寻呼控制器标识外, 还携带一 个指示信息, 显式地表明该 RNG-REQ消息是由于定位触发的上报消息; 然后测量基站将测量值发送给终端所附着的附着基站或者发送给终端的 寻呼控制器。
方式三: 定义一种新的空闲状态下的测量结果上报消息, 携带获得的 测量数据, 还携带有终端当前所附着的附着基站标识或携带终端的寻呼控 制器标识。 测量基站接收到该新定义的上报消息后, 获取其携带的测量结 果值, 然后测量基站将测量值发送给终端所附着的附着基站或者终端的寻 呼控制器。
方式四: 终端完成对各测量基站的测量后, 记录每个测量基站的测量 结果, 然后发送空口消息给其当前所附着的附着基站, 或者发送给网络侧 网关或设置于网络侧的专用于定位计算的网络实体。 在发送的空口消息中 包含一个测量结果列表, 存储终端与各测量基站之间的测量值。 具体的空 口消息可以是 RNG-REQ消息, 也可以是新定义的空闲状态下的测量结果 上报消息。
上述方式四中, 对于 RD值的测量以及上 ·¾, 可以有两种形式: 选择 一个基准基站(可选地, 可以默认为 MS接收到 MOB-PAG-ADV消息的基 站, 或者是准备发送测量结果的目标基站, 或者上报基站列表中的第一个 基站)进行测距过程, 获得该基准基站的 RTD值, 上报该基站的 BSID以 及 RTD值; 对于其他测量基站则可以采用测量其对基准基站的相对时延 的方式进行测量并且上报给网络;
或者, 不选择基准基站, 仅仅测量两个基站之间的 RD值, 但是需要 把和该 RD值相关的两个 BSID (同上一种上报形式, 如果默认选择了一 个基准基站, 可以只上报一个基站的 BSID ) 同时上报给网络, 以确定相 对时延的相关基站。
针对上面所述的所有测量结果上报方式, 测量结果可以包含一个或者 多个测量类型的结果, 例如往返时延 RTD, 相对时延 RD, 接受信号强度 RSSI, 载波干扰噪声比 CINR的一个或者多个。
4、 附着基站接收到上报的测量结果后, 可以返回相应响应消息给终 端。
附着基站在收到上报的测量结果后, 根据所述的测量结果就可以计算 出终端的定位结果。 这样, 网络侧就可以在不激活 Idle状态下终端的情况 下实现对 Idle状态下终端的定位。
可选的, 本发明实施例中, 附着基站还可以把所述定位结果发送给终 端, 如可以通过所述的响应消息把所述定位结果发给所述终端, 也可以是 新定义一个消息, 并通过该新定义的消息把定位结果发送给终端, 该新定 义的消息应该是 Idle状态下终端可以接收的消息。
可选地, 在终端和测量基站之间完成了预估提前时间协商的场景中, 还可以由各测量基站在判断出 Ranging达到成功状态时, 计算出测量结果 并报告给终端的附着基站、 网络侧网关或设置于网络侧的专用于定位计算 的网给实体。
终端和测量基站之间实现预估提前时间协商的方式有很多, 例如: 由 终端和测量基站发送的 RNG-REQ消息携带, 通知测量基站对应的预估提 前时间信息; 或者终端将选择的测量基站及对应的预估提前时间信息上报 给附着基站, 由附着基站分别通知各测量基站。
特别地, 如果预估提前时间信息本身就是由附着基站向每个候选测量 基站请求获得的, 则不需要再与各测量基站之间进行预估提前时间的协 商。
本发明实施例中, 所述的 BSID可以是完整的 BSID,也可以是网络为 每个 BS定义好的 BS索引值。 BS可以通过广播消息广播构造 BSID和 BS 索引值的对应关系表。
在图 1 所示流程中, 终端接收附着基站发送的第一消息 (如
MOB-PAG-ADV消息)后, 如果自身不支持定位或不希望被定位, 则向附 着基站返回定位拒绝,例如,通过 RNG-REQ消息携带指示定位拒绝指示。
除了实施例 1 中的用寻呼广播 MOB-PAG-ADV消息外, 本发明实施 例还可以通过 UL_MAP消息。 具体参见实施例 2。
根据本发明上述实施例提供的测量 RTD 的方法, 一种无线接入系统 实施例, 包括基站和无线终端, 其中:
所述基站, 用于发送第一消息, 所述第一消息中携带定位指示信息以 及终端标识;
所述无线终端, 用于接收所述第一消息, 解析出接收的第一消息中包 含有自身对应的终端标识后, 选择测量基站执行测距过程, 根据所述测距 过程获得终端与各测量基站之间的往返时延 RTD值。
所述第一消息中还可以携带候选测量基站列表, 所述候选测量基站列 表中指定候选的测量基站, 进一步的, 还可以包括要求终端向各测量基站 触发测距过程时对应的预估提前时间。
可选地, 本发明实施例中, 基站还可以向候选测量基站列表中的测量 基站请求触发测距的 CDMA码字, 并将测量基站返回的 CDMA码字也通 过第一消息 (如为 MOB-PAG-ADV消息)携带发送给终端。
可选地, 本发明实施例中, 所述第一消息中除了包括上述的测量基站 CDMA码字外还可以进一步包括对应的测量基站为测距分配的物理资源。
可选地, 本发明实施例中, 在所述第一消息中还可以携带定位辅助信 息, 所述定位辅助信息可以包括 CDMA码字、 和 /或测量基站分配的空口 资源。 这里, 若所述所述第一消息中同时包括有候选测量基站列表, 则所 述携带定位辅助信息可以是在所述第一消息中携带有所述的候选测量基 站列表中全部或部分候选测量基站分配的定位辅助信息, 本发明实施例 中, 也可以是只包括一个测量基站分配的定位辅助信息, 这样可以节省空 口资源, 这里, 所述只包括一个测量基站分配的定位辅助信息可以是所述 候选测量基站列表中任——个测量基站分配的定位辅助信息, 当然也可以 是包括发送当前所述第一消息的基站分配的定位辅助信息。 若所述所述第 一消息中没有候选测量基站列表, 则所述定位辅助信息可以是下发当前所 述第一消息的基站分配的定位辅助信息, 所述基站可以是附着基站。
所述终端还可以从所述候选测量基站列表中选择全部或部分候选测 量基站作为测量基站, 并按照所述预估提前时间与选择出的测量基站触发 测距过程, 获得 RTD值。
根据本发明上述实施例提供的获取测量值的方法, 另一种无线接入系 统实施例, 包括基站和无线终端, 其中: 基站, 用于发送第一消息, 所述 第一消息中携带定位指示信息以及终端标识; 无线终端, 用于接收所述第 一消息, 解析出接收的第一消息中包含有自身对应的终端标识后, 选择测 量基站获得测量值。
在上述测量 RTD的方法的实施例 1和 /或实施例 2和 /或获取测量值的 方法的实施例中, 所述第一消息中还可携带用于标识定位过程的定位交互 标识信息, 所述第二消息中还携带用于标识定位过程的定位交互标识信 息。 通过本发明实施例提供的系统, 当需要对 Idle状态下的终端进行定位 时可以不用激活所述 Idle状态下的终端。
本发明实施例还提供一种基站, 其结构示意图如图 2所示, 包括: 第一指令单元, 用于向终端发送广播消息, 携带定位指示信息以及终 端标识;
第一测距单元, 用于与终端交互执行测距过程;
还包括:
第一上报单元, 用于在判断出与终端的测距达到成功状态时, 计算出 RTD并报告给终端的附着基站、网络侧网关或设置于网络侧的专用于定位 计算的网络实体。
本发明的实施例还提供了另一种基站, 其结构示意图如图 5所示, 包 括:
第三指令单元, 用于向终端发送第一消息, 携带定位指示信息以及终 端标识;
第三获取单元, 用于获得测量值。
进一步的, 所述终端还包括:
第三上报单元, 将第三获取单元获得的测量值报告给终端的附着基 站、 网络侧网关或设置于网络侧的专用于定位计算的网络实体。
本发明实施例再还提供一种无线终端, 其结构示意图如图 3所示, 包 括:
第二指令单元, 用于接收基站发送的携带定位指示信息以及终端标识 的广播消息;
第二测距单元, 用于选择测量基站; 并与选择出的测量基站执行测距 过程获得所述 RTD值;
还包括:
第二上报单元, 用于将与各测量基站在测距过程获得的 RTD值上报 给网络侧。
本发明实施例再还提供另一种无线终端, 其结构示意图如图 6所示, 包括: 第四指令单元和第四获取单元;
所述第四指令单元, 用于接收基站发送的携带定位指示信息以及终端 标识第一消息, 解析出接收的所述第一消息中包含有自身对应的终端标识 后, 通知第四获取单元;
所述第四获取单元, 用于根据所述定位指示信息选择测量基站获得测 量值。
还包括:
第四上报单元, 用于将获得的测量值上报给网络侧。
本发明实施例提供的方法与系统, 在不激活终端的情况下, 通过发送 广播消息携带定位指示信息, 即可实现 Idle状态下的终端的定位, 解决了 现有技术中基站对 Idle状态下的终端进行定位时, 必须先激活该终端的问 题。
除了上述实施例中网络侧触发来实现 I d 1 e状态下终端的定位过程外 , 还可以是 Id l e状态下终端自身来触发定位过程, 对于 I d l e状态下终端自 身触发的定位过程, 可以由以下两种方案实现:
方案 1
步骤 11、 Id l e状态下的终端向网络侧发送触发消息, 触发 I d l e状态 下的终端定位流程。
本发明实施例中, 所述的触发消息可以是 RNG-REQ 消息, 在所述的 RNG-REQ消息中增加一个信元,指示该消息用于触发 I d 1 e状态下的终端定 位过程。
可选的, 本发明实施例中, 考虑到定位时延的问题, 可以重新定义一 个特别类型的 CDMA码字集合, 当终端发送该集合内的 CDMA码字给网 络侧进行 Ranging过程时, 网络侧就知道终端当前是发起定位测距过程。 可选的, 本发明实施例中, 还可以是新定义一个触发消息, Id l e状态 下的终端可以发送此消息给网络侧, 用于触发网络侧在不激活 Id l e状态 下终端的情况下对所述终端进行定位测距过程。
步骤 12、 13、 14同实施例 1、 2方案中的步骤 1、 2、 3类似, 由基站 下发第一消息及后续流程来执行对 Idle状态下终端进行测距过程,在此不 再重复描述。
步骤 15、 附着基站接收到上报的 RTD测量结果后, 计算终端定位结 果并发送给所述终端。
附着基站在收到上报的 RTD测量结果后, 根据所述的 RTD测量结果 就可以计算出终端的定位结果。 这样, 网络侧就可以在不激活 Idle状态下 终端的情况下实现对 Idle状态下终端的定位。
本发明实施例中, 所述把定位结果下发给终端可以有如下几种方法: 方法 1、 定义一个专门的消息, 在计算出定位结果后通过此新定义的 消息下发定位结果给终端, 并且允许终端在空闲态接收此消息。
方法 2、 可以是通过一个响应消息, 如可以是通过 RNG-RSP消息把 定位结果发送给终端。
方法 3、还可以在 MOB-PAG-ADV消息中再次包含该终端, 并且指示 终端只需要接收 MOB-PAG-ADV消息中的定位结果。
这样,就可以实现在不激活 Idle状态下的终端的情况下完成由 Idle状 态下的终端触发的定位过程。
方案 2
由于现有技术中 I d 1 e状态下的终端只能发送 RNG-REQ消息和 CDMA码 字, 本发明实施例中, 所述 Id l e状态下的终端和其当前测量基站执行测 距过程, 并在给所述当前测量基站发送 MG-REQ 消息的时候, 在所述 RNG-REQ 消息中携带信息指示此测距过程是用于测距定位和 /或携带终端 当前所属的锚寻呼控制器标识或者附着基站标识。 进一步的, 本发明实施 例中, 如果 RTD由终端计算, 那么还可以在 MG-REQ消息中携带所述当前 测量基站的 RTD值。 最后, 所有 RTD汇总在锚寻呼控制器或者附着基站, 然后就可以进行定位计算了。 然后, 网络把定位计算的结果发送给终端。
在空闲态终端侧触发的定位过程中, 终端可以在重新定义一个特别类 型的 CDMA码字集合里选取一个 CDMA码字完成和第一个基站的测距过 程, 后续就由该第一基站和其相邻基站进行协商, 获取相应的物理资源和 分配的 CDMA码字, 从而按照如前面网络侧触发的测距过程类似的流程 完成和其它基站的测距过程。
网络把定位计算结果发送给终端的方法 1 : 若当终端决定当前测量基 站是最后一个需要扫描的基站,则终端可以在 RNG-REQ消息中进行指示, 当网络获得此指示后, 就可以进行定位的计算过程, 并且在获得最后定位 结果后, 通过此测量基站发送的 RNG-RSP消息把定位结果发送给终端。
网络把定位计算结果发送给终端的方法 2: 定义一个专门的消息, 网 络在计算出定位结果后通过此新定义的消息下发定位结果给终端, 并且允 许终端在空闲态接收此消息。
网络把定位计算结果发送给终端的方法 3:在 MOB-PAG-ADV消息中 再次包含该终端, 并且指示终端只需要接收 MOB-PAG-ADV消息中的定 位结果。
可选的, 本发明实施例中, 考虑到定位时延的问题, 可以重新定义一 个特别类型的 CDMA码字集合, 当终端发送该集合内的 CDMA码字进行 Ranging 过程时, 网络侧就知道终端当前是发起定位测距过程, 和上述在 RNG-REQ 消息中携带测距定位指示信息等效, 若终端向网络侧发送此特 别类型的 CDMA码字, 则可以不用在所述的 RNG-REQ消息中携带测距 定位指示信息了。
进一步地, 终端在当前附着基站或者任一测量 BS的测量结束后, 即 前面实施例中所述的第一测量基站测距成功后, (终端把下一测量基站标 识放在 RNG-REQ消息中告诉网络, 此为可选步骤; 或者, 下一测量基站 可以由网络决定, 但是是否发起测距过程由终端决定) , 第一测量基站把 下一测量基站的定位辅助信息发送给终端; 第一测量基站和下一测量基站 之间通过后端网络交互定位辅助信息。
后续过程中, 前一测量基站在测距过程成功后, 把下一基站的定位辅 助信息发送给终端, 一直到最后一个测量基站同终端完成了测距过程。
由于是空闲态终端触发定位的过程, 网络侧需要把定位结果通知终 端; 过程中终端在发起测距 Ranging过程也打上定位目的的标签, 这样网 络侧在定位测距成功后可以不为终端分配 CID等资源,同时通知终端定位 结果。
MS通过竟争来扫描相邻基站也是一种方法, 可能时延会大一点; 如 果下发辅助参数(CDMA码字等)会快一点。
本发明的方案主要体现在如何实现空闲状态下的终端进行定位过程, 包括网络侧触发的定位以及终端自己触发的定位。 以上实施例中涉及到的 定位过程中 RTD的测量都是基于终端侧完成的, 如果考虑到 RTD的测量 由基站侧完成, 本发明所体现的如何实现空闲状态下终端的定位方案也同 样适用, 所不同的只是具体的 RTD测量过程有所不同, 进而影响到 RTD 的获取和知会过程有所不同。 本发明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权 利要求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在 内。

Claims

权利 要求 书
1、 一种测量往返时延的方法, 其特征在于, 包括:
基站发送第一消息, 所述第一消息中携带定位指示信息以及终端标 识;
终端解析出所述第一消息中包含有自身对应的终端标识后, 选择测量 基站执行测距过程;
根据所述测距过程获得终端与各测量基站之间的往返时延 RTD值。
2、 如权利要求 1 所述方法, 其特征在于, 所述基站发送第一消息, 具体包括:
所述基站发送上行资源对应表 UL-MAP消息, 所述 UL-MAP消息携 带定位指示信息以及终端标识; 或者
所述基站发送寻呼广播 MOB-PAG-ADV消息, 所述 MOB-PAG-ADV 消息携带终端标识,并在所述 MOB-PAG-ADV消息中与终端对应的 Action 域里携带定位指示信息。
3、 如权利要求 1 所述的方法, 其特征在于, 所述定位指示信息包含 下述信息的任意组合: 定位类型信息、定位精度信息、扫描基站数目信息。
4、 如权利要求 1 所述方法, 其特征在于, 所述基站发送的第一消息 中还携带候选测量基站列表, 所述候选测量基站列表中指定候选的测量基 站;
所述终端从所述候选测量基站列表中选择基站作为测量基站, 与选择 出的测量基站触发测距过程。
5、 如权利要求 4所述的方法, 其特征在于, 还包括:
所述终端还从信号强度大于设定门限值的基站中选择出测量基站执 行测距过程。
6、 如权利要求 4所述的方法, 其特征在于, 所述基站发送的第一消 息中还携带所述候选测量基站对应的 CDMA码字; 所述终端从所述候选测量基站列表中选择基站作为测量基站, 并使用 所述测量基站对应的 CDMA码字与选择出的测量基站执行测距过程。
7、 如权利要求 4所述的方法, 其特征在于, 所述基站发送的第一消 息中还携带所述候选测量基站对应的 CDMA码字及所述候选测量基站为 测距分配的物理资源;
所述终端从所述候选测量基站列表中选择基站作为测量基站, 并使用 所述测量基站对应的 CDMA码字和所述为测距分配的物理资源与选择出 的测量基站执行测距过程。
8、 如权利要求 4所述的方法, 其特征在于, 所述基站发送的第一消 息中还携带所述全部或部分候选测量基站对应的定位辅助信息;
所述终端从所述候选测量基站列表中选择基站作为测量基站, 并使用 所述测量基站对应的定位辅助信息与选择出的测量基站执行测距过程。
9、 如权利要求 4所述的方法, 其特征在于, 所述基站发送的第一消 息中还携带所述候选测量基站中第一测量基站对应的定位辅助信息;
所述终端使用所述定位辅助信息与所述第一测量基站执行测距过程; 并且在和第一测量基站测距过程成功后, 第一测量基站把下一基站的定位 辅助信息发送给终端;
后续过程中, 前一测量基站在测距过程成功后, 把下一基站的定位辅 助信息发送给终端, 直到终端与最后一个测量基站完成测距过程。
10、 如权利要求 4所述的方法, 其特征在于, 所述基站发送的第一消 息中还携带终端向各测量基站触发测距过程时对应的预估提前时间; 当所 述测量基站获知自身对应的预估提前时间信息后, 还包括:
在判断出测距达到成功状态时, 计算出 RTD并报告给所述附着基站、 网络侧网关或设置于网络侧的专用于定位计算的网络实体。
11、 如权利要求 1-10中所述的任一方法, 其特征在于, 当所述终端不 支持定位, 或者不希望被定位时, 向所述基站返回定位拒绝指示。
12、 如权利要求 1-10中所述的任一方法, 其特征在于, 还包括: 将获得的 RTD值上报给网络侧。
13、 如权利要求 1-10中所述的任一方法, 其特征在于, 还包括: 所述 第一消息中还携带用于唯一标识一次定位过程的定位交互标识信息。
14、 如权利要求 12所述的方法, 其特征在于, 所述将获得的 RTD值 上报给网络侧, 具体包括:
终端向测量基站发送第二消息, 在所述第二消息中携带与所述测量基 站之间的 RTD值及终端当前所附着的基站标识; 所述测量基站解析所述 第二消息, 将解析出的所述 RTD值发送给终端所附着的基站; 或者
终端向测量基站发送第二消息, 在所述第二消息中携带与所述测量基 站之间的 RTD值及终端的寻呼控制器标识; 所述测量基站解析所述第二 消息, 将解析出的所述 RTD值发送给终端的寻呼控制器; 或者
终端向测量基站发送第二消息, 在所述第二消息中携带一个指示信 息, 显式地表明该第二消息是由于定位触发的上报消息, 还携带与所述测 量基站之间的 RTD值及终端当前所附着的基站标识; 所述测量基站解析 所述第二消息, 将解析出的所述 RTD值发送给终端所附着的基站; 或者 终端向测量基站发送第二消息, 在所述第二消息中携带一个指示信 息, 显式地表明该第二消息是由于定位触发的上报消息, 还携带与所述测 量基站之间的 RTD值及终端的寻呼控制器标识; 所述测量基站解析所述 第二消息, 将解析出的所述 RTD值发送给终端的寻呼控制器; 或者
终端向测量基站发送新定义的空闲状态下的 RTD上报消息, 在所述 上报消息中携带与所述测量基站之间的 RTD值及终端当前所附着的基站 标识; 所述测量基站解析所述上报消息, 将解析出的所述 RTD值发送给 终端所附着的基站; 或者
终端向测量基站发送新定义的空闲状态下的 RTD上报消息, 在所述 上报消息中携带与所述测量基站之间的 RTD值及终端的寻呼控制器标识; 所述测量基站解析所述上报消息, 将解析出的所述 RTD值发送给终端的 寻呼控制器; 或者 终端完成对各测量基站的测量后, 记录与每个测量基站之间的 RTD 值, 并将与各测量基站之间的 RTD值发送给其所附着的基站或者网络侧 网关或设置于网络侧的专用于定位计算的网络实体。
15、 如权利要求 14所述的方法, 其特征在于, 所述终端将与各测量 基站之间的 RTD值发送给其所附着的基站或者网络侧网关或设置于网络 侧的专用于定位计算的网络实体, 具体包括:
所述终端向其所附着的基站发送第二消息, 或者向网络侧网关或设置 于网络侧的专用于定位计算的网络实体发送所述新定义的空闲状态下的 RTD上报消息;
在所述第二消息或所述上报消息中包含测量结果列表, 在所述测量结 果列表中包含测量基站的标识以及与测量基站之间的对应 RTD值。
16、 如权利要求 14或 15所述的方法, 其特征在于, 还包括: 所述第 二消息中还携带用于唯一标识一次定位过程的定位交互标识信息。
17、 如权利要求 1-10中所述的任一方法, 其特征在于, 在所述基站发 送第一消息前进一步包括:
终端向网络侧发送触发消息, 触发 Id l e状态下的终端定位流程。
18、 如权利要求 17 中所述的方法, 其特征在于, 所述触发消息为 RNG-REQ消息,在所述 RNG-REQ消息中携带指示该消息用于触发 I d l e状态 下的终端定位过程的信息; 或
所述触发消息消息为特别类型的 CDMA码字, 该 CDMA码字用于表示触 发 Id l e状态下的终端定位过程; 或
所述触发消息消息为新定义的一种消息。
19、 一种无线接入系统, 其特征在于, 包括:
基站, 用于发送第一消息, 所述第一消息中携带定位指示信息以及终 端标识;
无线终端, 用于接收所述第一消息, 解析出接收的第一消息中包含有 自身对应的终端标识后, 选择测量基站执行测距过程, 根据所述测距过程 获得终端与各测量基站之间的往返时延 RTD值。
20、 如权利要求 19所述的无线接入系统, 其特征在于, 所述第一消 息中还携带有候选测量基站列表, 所述候选测量基站列表中指定候选的测 量基站及终端向各测量基站触发测距过程时对应的预估提前时间;
所述终端从所述候选测量基站列表中选择基站作为测量基站, 并按照 所述预估提前时间与选择出的测量基站触发测距过程。
21、 一种基站, 其特征在于, 包括:
第一指令单元, 用于向终端发送第一消息, 携带定位指示信息以及终 端标识;
第一测距单元, 用于与终端交互执行测距过程。
22、 如权利要求 21所述的基站, 其特征在于, 还包括:
第一上报单元, 用于在判断出与终端的测距达到成功状态时, 计算出 RTD并报告给终端的附着基站、网络侧网关或设置于网络侧的专用于定位 计算的网络实体。
23、 一种无线终端, 其特征在于, 包括: 第二指令单元和第二测距单 元;
所述第二指令单元, 用于接收基站发送的携带定位指示信息以及终端 标识第一消息, 解析出接收的所述第一消息中包含有自身对应的终端标识 后, 通知第二测距单元;
所述第二测距单元, 用于根据所述定位指示信息选择测量基站; 并与 选择出的测量基站执行测距过程获得所述 RTD值。
24、 如权利要求 23所述的无线终端, 其特征在于, 还包括: 第二上报单元, 用于将与各测量基站在测距过程获得的 RTD值上报 给网络侧。
25、 一种获取测量值的方法, 其特征在于, 包括:
基站发送第一消息, 所述第一消息中携带定位指示信息以及终端标 识; 终端解析出所述第一消息中包含有自身对应的终端标识后, 选择测量 基站获得测量值。
26、 如权利要求 25所述方法, 其特征在于, 所述基站发送第一消息, 具体包括:
所述基站发送上行资源对应表 UL-MAP消息, 所述 UL-MAP消息携 带定位指示信息以及终端标识; 或者
所述基站发送寻呼广播 MOB-PAG-ADV消息, 所述 MOB-PAG-ADV 消息携带终端标识,并在所述 MOB-PAG-ADV消息中与终端对应的 Action 域里携带定位指示信息。
27、 如权利要求 26所述方法, 其特征在于, 所述 MOB-PAG-ADV消 息中还携带测量数据类型。
28、 如权利要求 25 所述的方法, 其特征在于, 所述测量值包括下述 值的任意组合: 往返时延 RTD, 相对时延 RD, 接受信号强度 RSSI, 载波 干扰噪声比 CINR。
29、 如权利要求 28所述的方法, 其特征在于, 若测量值为 RTD, 则 选择测量基站获得测量值具体为:
选择测量基站执行测距过程;
根据所述测距过程获得终端与各测量基站之间的 RTD。
30、如权利要求 29所述的方法,其特征在于,若测量值为 RD或 RSSI 或 CINR, 则选择测量基站获得测量值具体为:
选择测量基站, 检测该基站的下行信号获得 RD或 RSSI或 CINR。
31、 如权利要求 25 所述的方法, 其特征在于, 所述定位指示信息包 含下述信息的任意组合: 定位类型信息、 定位精度信息、 扫描基站数目信 息、 测量数据类型。
32、 如权利要求 31 所述的方法, 其特征在于, 所述测量数据类型包 括下述类型的任意组合: 往返时延, 相对时延, 接受信号强度, 载波干扰 噪声比。
33、 如权利要求 25 所述方法, 其特征在于, 所述基站发送的第一消 息中还携带候选测量基站列表, 所述候选测量基站列表中指定候选的测量 基站;
所述终端从所述候选测量基站列表中选择基站作为测量基站, 获得测 量值。
34、 如权利要求 33所述的方法, 其特征在于, 还包括:
所述终端还从信号强度大于设定门限值的基站中选择出测量基站获 得测量值。
35、 如权利要求 25-34中所述的任一方法, 其特征在于, 当所述终端 不支持定位, 或者不希望被定位时, 向所述基站返回定位拒绝指示。
36、 如权利要求 25-34中所述的任一方法, 其特征在于, 还包括: 将获得的测量值上报给网络侧。
37、 如权利要求 25-34中所述的任一方法, 其特征在于, 还包括: 所 述第一消息中还携带用于标识定位过程的定位交互标识信息。
38、 如权利要求 36所述的方法, 其特征在于, 所述将获得的测量值 上报给网络侧, 具体包括:
终端向测量基站发送第二消息, 在所述第二消息中携带与所述测量基 站之间的测量值及终端当前所附着的基站标识; 所述测量基站解析所述第 二消息, 将解析出的所述测量值发送给终端所附着的基站; 或者
终端向测量基站发送第二消息, 在所述第二消息中携带与所述测量基 站之间的测量值及终端的寻呼控制器标识; 所述测量基站解析所述第二消 息, 将解析出的所述测量值发送给终端的寻呼控制器; 或者
终端向测量基站发送第二消息, 在所述第二消息中携带一个指示信 息, 显式地表明该第二消息是由于定位触发的上报消息, 还携带与所述测 量基站之间的测量值及终端当前所附着的基站标识; 所述测量基站解析所 述第二消息, 将解析出的所述测量值发送给终端所附着的基站; 或者 终端向测量基站发送第二消息, 在所述第二消息中携带一个指示信 息, 显式地表明该第二消息是由于定位触发的上报消息, 还携带与所述测 量基站之间的测量值及终端的寻呼控制器标识; 所述测量基站解析所述第 二消息, 将解析出的所述测量值发送给终端的寻呼控制器; 或者
终端向测量基站发送新定义的空闲状态下的测量结果上报消息, 在所 述上报消息中携带与所述测量基站之间的测量值及终端当前所附着的基 站标识; 所述测量基站解析所述上报消息, 将解析出的所述测量值发送给 终端所附着的基站; 或者
终端向测量基站发送新定义的空闲状态下的测量结果上报消息, 在所 述上报消息中携带与所述测量基站之间的测量值及终端的寻呼控制器标 识; 所述测量基站解析所述上报消息, 将解析出的所述测量值发送给终端 的寻呼控制器; 或者
终端完成对各测量基站的测量后, 记录与每个测量基站之间的测量 值, 并将与各测量基站之间的测量值发送给其所附着的基站或者网络侧网 关或设置于网络侧的专用于定位计算的网络实体。
39、 如权利要求 38所述的方法, 其特征在于, 所述终端将与各测量 基站之间的测量值发送给其所附着的基站或者网络侧网关或设置于网络 侧的专用于定位计算的网络实体, 具体包括:
所述终端向其所附着的基站发送第二消息, 或者向网络侧网关或设置 于网络侧的专用于定位计算的网络实体发送所述新定义的空闲状态下的 测量结果上报消息;
在所述第二消息或所述上报消息中包含测量结果列表, 在所述测量结 果列表中包含测量基站的标识以及与测量基站之间的对应测量值。
40、 如权利要求 38或 39所述的方法, 其特征在于, 还包括: 所述第 二消息中还携带用于标识定位过程的定位交互标识信息。
41、 如权利要求 25-34中所述的任一方法, 其特征在于, 在所述基站 发送第一消息前进一步包括:
终端向网络侧发送触发消息, 触发 Id le状态下的终端定位流程。
42、 如权利要求 41 所述的方法, 其特征在于, 所述触发消息为 RNG-REQ消息, 在所述 RNG-REQ消息中携带指示该消息用于触发 Idle 状态下的终端定位过程的信息; 或
所述触发消息消息为特别类型的 CDMA码字, 该 CDMA码字用于表 示触发 Idle状态下的终端定位过程; 或
所述触发消息消息为新定义的一种消息。
43、 一种无线接入系统, 其特征在于, 包括:
基站, 用于发送第一消息, 所述第一消息中携带定位指示信息以及终 端标识;
无线终端, 用于接收所述第一消息, 解析出接收的第一消息中包含有 自身对应的终端标识后, 选择测量基站获得测量值。
44、 如权利要求 43 所述的无线接入系统, 其特征在于, 所述第一消 息中还携带有候选测量基站列表, 所述候选测量基站列表中指定候选的测 量基站;
所述终端从所述候选测量基站列表中选择基站作为测量基站, 获得测 量值。
45、 一种基站, 其特征在于, 包括:
第三指令单元, 用于向终端发送第一消息, 携带定位指示信息以及终 端标识;
第三获取单元, 用于获得测量值。
46、 如权利要求 45所述的基站, 其特征在于, 还包括:
第三上报单元, 将第三获取单元获得的测量值报告给终端的附着基 站、 网络侧网关或设置于网络侧的专用于定位计算的网络实体。
47、 一种无线终端, 其特征在于, 包括: 第四指令单元和第四获取单 元;
所述第四指令单元, 用于接收基站发送的携带定位指示信息以及终端 标识第一消息, 解析出接收的所述第一消息中包含有自身对应的终端标识 后, 通知第四获取单元;
所述第四获取单元, 用于根据所述定位指示信息选择测量基站获得测 量值。
48、 如权利要求 47所述的无线终端, 其特征在于, 还包括: 第四上报单元, 用于将获得的测量值上报给网络侧。
PCT/CN2008/070104 2007-01-22 2008-01-15 Procédé et système de mesure du temps de transmission aller-retour WO2008089677A1 (fr)

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