WO2009147709A1 - タイミング調整方法、移動局、基地局および移動通信システム - Google Patents
タイミング調整方法、移動局、基地局および移動通信システム Download PDFInfo
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- WO2009147709A1 WO2009147709A1 PCT/JP2008/060151 JP2008060151W WO2009147709A1 WO 2009147709 A1 WO2009147709 A1 WO 2009147709A1 JP 2008060151 W JP2008060151 W JP 2008060151W WO 2009147709 A1 WO2009147709 A1 WO 2009147709A1
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- timing adjustment
- mobile station
- transmission timing
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- adjustment information
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- 238000010295 mobile communication Methods 0.000 title claims description 54
- 230000005540 biological transmission Effects 0.000 claims abstract description 387
- 238000012545 processing Methods 0.000 claims description 170
- 230000004044 response Effects 0.000 claims description 21
- 238000012544 monitoring process Methods 0.000 claims description 8
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- 238000004891 communication Methods 0.000 description 52
- 238000010586 diagram Methods 0.000 description 27
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- 238000005259 measurement Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- 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
- H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
Definitions
- This case relates to a timing adjustment method, a mobile station, a base station, and a mobile communication system.
- This case may be used for uplink (uplink: UL) communication control of a wireless (mobile) communication system.
- a wireless (mobile) communication system including a wireless terminal (mobile station) such as a mobile phone
- a third generation mobile communication service using a code division multiple access (CDMA) system is currently provided.
- CDMA code division multiple access
- next-generation mobile communication systems that enable higher-speed communication are also being studied.
- 3GPP 3rd Generation Partnership Project
- LTE Long Term Evolution
- a radio base station evolved Node B: eNB
- a mobile station User Equipment: UE
- a channel used when the UE starts transmission to the eNB is prepared. Is done. In 3GPP, this channel is called a random access channel (RACH), and the communication start procedure by RACH is called random access (RA).
- RACH random access channel
- the random access in LTE is designed by the Slotted Aloha method, and time and frequency resources for transmitting RACH are secured.
- the RACH includes information for the eNB to identify transmission from the UE. That is, an identifier called a signature (or preamble) is included so that the RACH can be commonly used by a plurality of UEs.
- the UE performs transmission using any one of a plurality of signature candidates, so that even if different UEs transmit the signature via the RACH using the same time and frequency resources, If the UE uses a different signature, the eNB can identify the UE based on the received signature.
- RACH is used at the start of communication, and thereafter, an individual channel (or shared channel) is used.
- the UE when the UE performs RA, for example, at the time of initial transmission (outgoing), when there is an incoming call from the eNB (when downlink (DL) data is generated), at the time of handover, at the time of return after disconnection (interrupted) When communication is resumed).
- the radio link in the direction from the eNB to the UE is the downlink (DL), and the radio link in the opposite direction is the uplink (UL).
- an individual signature that can be used exclusively is not allocated to the UE whose presence cannot be managed by the eNB, such as at the time of initial transmission or when returning after disconnection.
- Such a UE performs RA by selecting one from a plurality of (for example, 64 types) signatures prepared in advance. Therefore, although with a low probability, multiple UEs may simultaneously perform RA using the same signature.
- Such an RA method is called contention based access procedure (contention-based RA procedure).
- the eNB resolves (selects) the conflicting signature (UE) and responds to the selected UE. Based on the response received from the eNB, the UE determines whether it has been selected by the eNB. The UE selected as the eNB continues communication with the eNB (RA procedure), and performs radio channel setting and the like with the eNB. The UE that has not been selected by the eNB re-executes RA after a certain time has elapsed.
- Another object is to reduce the delay time until the mobile station can connect to the base station and start communication.
- the present invention is not limited to the above-described object, and can be positioned as one of other objects that is an effect obtained by each configuration shown in the embodiments to be described later and that cannot be obtained by conventional techniques. .
- the mobile station includes: When connection processing for the base station is performed based on the first transmission timing adjustment information, if the second transmission timing adjustment information is received during the connection processing, the first transmission timing adjustment information For transmission processing up to the expiration date, the first transmission timing adjustment information is applied to adjustment of transmission timing, and for transmission processing after the expiration date of the first transmission timing adjustment information, the first transmission timing adjustment information is applied.
- a timing adjustment method that applies the transmission timing adjustment information of 2 to the adjustment of the transmission timing can be used.
- the mobile station includes: When connection processing to the base station is performed based on the first transmission timing adjustment information, a signal including identification information of the mobile station transmitted from the base station to the mobile station in the process of the connection processing A timing adjustment method including the second transmission timing adjustment information can be used.
- the mobile station includes: When connection processing for the base station is performed based on the first transmission timing adjustment information, when the second transmission timing adjustment information is received during the connection processing, the second transmission timing adjustment information is A timing adjustment method can be used in which the first transmission timing adjustment information is continuously applied without being applied, and the validity period of the first transmission timing adjustment information is extended.
- a timing adjustment method in a mobile communication system including a mobile station that performs transmission processing based on transmission timing adjustment information and a base station that receives a signal transmitted from the mobile station, the mobile station includes: When connection processing to the base station is performed based on the first transmission timing adjustment information, the expiration date of the first transmission timing adjustment information indicates the identification information of the mobile station during the connection processing.
- a timing adjustment method may be used in which the signal transmission process is executed based on the first transmission timing adjustment information when the signal arrives before the signal transmission process is performed.
- a timing adjustment method in a mobile communication system including a mobile station that performs transmission processing based on transmission timing adjustment information and a base station that receives a signal transmitted from the mobile station, the mobile station includes: When connection processing to the base station is performed based on the first transmission timing adjustment information, the expiration date of the first transmission timing adjustment information indicates the identification information of the mobile station during the connection processing.
- a timing adjustment method may be used in which the connection process is stopped when the signal arrives before the transmission process of the signal including the signal is performed.
- the mobile station includes: When connection processing to the base station is performed based on the first transmission timing adjustment information, a signal including identification information of the mobile station is transmitted during the connection processing, and the base station transmits the signal to the base station.
- the base station can use a timing adjustment method in which second transmission timing adjustment information is transmitted to the mobile station in response to reception of the signal.
- the mobile station in a mobile communication system including a mobile station and a base station that receives a signal transmitted from the mobile station, and performs transmission processing on the base station based on transmission timing adjustment information
- the connection processing to the base station is performed based on the transmission processing unit to be performed and the first transmission timing adjustment information
- the second transmission timing adjustment information is received during the connection processing
- the first transmission timing adjustment information is applied to the adjustment of the transmission timing, and the expiration date of the first transmission timing adjustment information
- a control unit that applies the second transmission timing adjustment information to the adjustment of the transmission timing for a transmission process by the transmission processing unit later. It is possible to use the dynamic stations.
- the base station in a mobile communication system comprising: a mobile station that performs transmission processing based on transmission timing adjustment information; and a base station that receives a signal transmitted from the mobile station, the mobile station
- a connection process to the base station is performed based on the first transmission timing adjustment information
- a signal including identification information of the mobile station which is transmitted to the mobile station in the process of the connection process
- the mobile station in a mobile communication system including a mobile station and a base station that receives a signal transmitted from the mobile station, and performs transmission processing for the base station based on transmission timing adjustment information
- the connection processing to the base station is performed based on the transmission processing unit to be performed and the first transmission timing adjustment information
- the second A mobile station comprising: a control unit that continuously applies the first transmission timing adjustment information without applying the transmission timing adjustment information, and extends the validity period of the first transmission timing adjustment information. Can be used.
- a mobile station in a mobile communication system comprising a mobile station and a base station that receives a signal transmitted from the mobile station, and performs transmission processing for the base station based on transmission timing adjustment information
- the connection processing to the base station is performed based on the transmission processing unit to be performed and the first transmission timing adjustment information
- the expiration date of the first transmission timing adjustment information is
- a mobile station including a control unit that executes transmission processing of a signal based on the first transmission timing adjustment information when it arrives before performing transmission processing of a signal including identification information of the mobile station is used. it can.
- a mobile station in a mobile communication system comprising a mobile station and a base station that receives a signal transmitted from the mobile station, wherein transmission processing for the base station is performed based on transmission timing adjustment information.
- transmission processing for the base station is performed based on transmission timing adjustment information.
- the connection processing to the base station is performed based on the transmission processing unit to be performed and the first transmission timing adjustment information
- the expiration date of the first transmission timing adjustment information is A mobile station provided with a control unit that stops the connection processing when it arrives before performing transmission processing of a signal including identification information of the mobile station.
- the base station in a mobile communication system comprising: a mobile station that performs transmission processing based on transmission timing adjustment information; and a base station that receives a signal transmitted from the mobile station.
- the reception processing unit that receives the signal transmitted from the mobile station and the mobile station are performing connection processing to the base station based on the first transmission timing adjustment information
- a base station including a control unit that transmits second transmission timing adjustment information to the mobile station in response to reception of the signal is used. Can do.
- a mobile communication system including a mobile station that performs transmission processing based on transmission timing adjustment information and a base station that receives a signal transmitted from the mobile station, the mobile station performs first transmission When connection processing for the base station is performed based on the timing adjustment information, if the second transmission timing adjustment information is received in the connection processing process, the expiration date of the first transmission timing adjustment information is reached.
- the first transmission timing adjustment information is applied to adjustment of transmission timing, and for transmission processing after the expiration date of the first transmission timing adjustment information, the second transmission timing is applied.
- a mobile communication system that applies adjustment information to transmission timing adjustment can be used.
- a mobile communication system including a mobile station that performs transmission processing based on transmission timing adjustment information and a base station that receives a signal transmitted from the mobile station, the mobile station performs a first transmission.
- connection processing to the base station is performed based on timing adjustment information
- a second transmission is performed in a signal including identification information of the mobile station transmitted from the base station to the mobile station in the connection processing process.
- a mobile communication system that includes timing adjustment information can be used.
- a mobile communication system including a mobile station that performs transmission processing based on transmission timing adjustment information and a base station that receives a signal transmitted from the mobile station, the mobile station performs first transmission When connection processing to the base station is performed based on timing adjustment information, if the second transmission timing adjustment information is received in the connection processing process, the second transmission timing adjustment information is not applied.
- a mobile communication system that continuously applies the first transmission timing adjustment information and extends the validity period of the first transmission timing adjustment information can be used.
- a mobile communication system including a mobile station that performs transmission processing based on transmission timing adjustment information and a base station that receives a signal transmitted from the mobile station, the mobile station performs first transmission
- the expiration date of the first transmission timing adjustment information is a signal transmission including identification information of the mobile station
- a mobile communication system that executes transmission processing of the signal based on the first transmission timing adjustment information when it arrives before processing is performed can be used.
- a mobile communication system including a mobile station that performs transmission processing based on transmission timing adjustment information and a base station that receives a signal transmitted from the mobile station, the mobile station performs first transmission
- the expiration date of the first transmission timing adjustment information is a signal transmission including identification information of the mobile station
- a mobile communication system including a mobile station that performs transmission processing based on transmission timing adjustment information and a base station that receives a signal transmitted from the mobile station, the mobile station performs first transmission When connection processing to the base station is performed based on timing adjustment information, a signal including identification information of the mobile station is transmitted in the connection processing process, and when the base station receives the signal, The base station can use a mobile communication system that transmits second transmission timing adjustment information to the mobile station in response to reception of the signal.
- FIG. 1 is a block diagram illustrating an example of a wireless (mobile) communication system according to a first embodiment. It is a sequence diagram which shows an example of a contention base RA procedure. It is a flowchart which shows the operation example of UE in a contention base RA procedure. It is a flowchart which shows the operation example of eNB in a contention base RA procedure.
- FIG. 6 is a sequence diagram showing an example of UL communication control (method 1-1) according to the first embodiment.
- FIG. 6 is a sequence diagram showing another example of UL communication control (method 1-1) according to the first embodiment.
- FIG. 6 is a sequence diagram showing another example of UL communication control (method 1-1) according to the first embodiment.
- FIG. 4 is a flowchart showing an example of UL communication control (method 1-1) of a UE according to the first embodiment.
- FIG. 6 is a sequence diagram showing an example of UL communication control (method 1-2) according to the first embodiment.
- FIG. 7 is a sequence diagram showing another example of UL communication control (method 1-2) according to the first embodiment.
- FIG. 7 is a sequence diagram showing another example of UL communication control (method 1-2) according to the first embodiment.
- 4 is a flowchart showing an example of UL communication control (method 1-2) of a UE according to the first embodiment.
- FIG. 5 is a sequence diagram showing an example of UL communication control (method 1-3) according to the first embodiment.
- FIG. 10 is a sequence diagram showing another example of UL communication control (method 1-3) according to the first embodiment.
- FIG. 10 is a sequence diagram showing another example of UL communication control (method 1-3) according to the first embodiment.
- 4 is a flowchart showing an example of UL communication control (method 1-3) of a UE according to the first embodiment.
- FIG. 6 is a sequence diagram showing an example of UL communication control (method 1-4) according to the first embodiment.
- FIG. 6 is a sequence diagram showing another example of UL communication control (method 1-4) according to the first embodiment.
- FIG. 6 is a sequence diagram showing another example of UL communication control (method 1-4) according to the first embodiment.
- FIG. 4 is a flowchart showing an example of UL communication control (method 1-4) of a UE according to the first embodiment.
- FIG. 10 is a sequence diagram showing an example of UL communication control (method 2-1) according to the second embodiment.
- FIG. 10 is a sequence diagram showing another example of UL communication control (method 2-1) according to the second embodiment.
- FIG. 10 is a sequence diagram showing another example of UL communication control (method 2-1) according to the second embodiment.
- 6 is a flowchart showing an example of UL communication control (method 2-1) of a UE according to the second embodiment.
- FIG. 10 is a sequence diagram showing an example of UL communication control (methods 2-2 and 2-3) according to the second embodiment.
- FIG. 10 is a sequence diagram showing another example of UL communication control (methods 2-2 and 2-3) according to the second embodiment.
- FIG. 10 is a sequence diagram showing another example of UL communication control (methods 2-2 and 2-3) according to the second embodiment.
- 6 is a flowchart showing an example of UL communication control (method 2-2) of a UE according to the second embodiment.
- 6 is a flowchart showing an example of UL communication control (method 2-3) of a UE according to the second embodiment.
- FIG. 10 is a sequence diagram showing an example of UL communication control (method 2-4) according to the second embodiment.
- FIG. 12 is a sequence diagram showing another example of UL communication control (method 2-4) according to the second embodiment.
- FIG. 12 is a sequence diagram showing another example of UL communication control (method 2-4) according to the second embodiment.
- 6 is a flowchart showing an example of UL communication control (method 2-4) of a UE according to the second embodiment. It is a sequence diagram which shows an example of UL communication control (method 3-3) concerning 3rd Embodiment.
- FIG. 10 is a sequence diagram showing another example of UL communication control (method 3-3) according to the third embodiment. It is a flowchart which shows an example of UL communication control (method 3-3) of eNB10 which concerns on 3rd Embodiment.
- 14 is a flowchart illustrating an example of UE UL communication control (method 3-3) according to the third embodiment.
- FIG. 1 is a block diagram illustrating an example of a wireless (mobile) communication system according to a first embodiment.
- the system illustrated in FIG. 1 includes an eNB 10 as an example of a radio base station and a UE 20 as an example of a radio terminal (mobile station) that communicates with the eNB 10 via a radio link in the radio area of the eNB 10.
- eNB 10 as an example of a radio base station
- UE 20 as an example of a radio terminal (mobile station) that communicates with the eNB 10 via a radio link in the radio area of the eNB 10.
- the radio link includes DL and UL radio channels.
- Each of the DL and UL radio channels may include a shared channel shared by a plurality of UEs and a dedicated channel that can be used exclusively by each UE.
- the configurations of the eNB 10 and the UE 20 illustrated in FIG. 1 may be common in the subsequent second and third embodiments unless otherwise specified.
- the radio base station 10 in this example is an eNB in LTE having a part or all of the functions of the radio network controller (RNC), it is a generation before LTE. (Which does not incorporate the RNC function). In addition, it may be a base station of another system in which the RA procedure is defined.
- RNC radio network controller
- the eNB 10 illustratively includes a transmission / reception antenna 11, a transmission / reception unit 12, a buffer 13, a UL synchronization determination unit 14, a timer management unit 15, and a UL resource management unit 16. I have it.
- the transmission / reception antenna 11 (hereinafter also simply referred to as “antenna 11”) transmits a DL radio signal that can be received by the UE 20 existing in a radio area (cell or sector) provided by the eNB 10, while the UE 20 Receives the UL radio signal transmitted by.
- the transmission / reception unit 12 performs a predetermined transmission process on transmission data (including user data and control data) addressed to the UE 20 to generate a radio channel signal, and outputs the signal to the transmission / reception antenna 11.
- the transmission processing includes, for example, encoding of DL transmission data, modulation of encoded data, mapping of a modulated signal to a frame of a predetermined channel, frequency conversion of a frame signal to a radio frequency (up-conversion), radio Frame power amplification, etc. may be included.
- a radio frame based on Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) can be applied to the radio frame.
- OFDM Orthogonal Frequency Division Multiplexing
- OFDMA Orthogonal Frequency Division Multiple Access
- the transmission / reception unit 12 performs a predetermined reception process on the UL radio signal (radio frame) received by the antenna 11 and acquires the UL data (including user data, control data, etc.) transmitted by the UE 20. To do.
- the reception processing may include, for example, low noise amplification of a received signal, frequency conversion (down conversion) to a baseband frequency, gain adjustment, demodulation, decoding, and the like. Note that the transmission / reception unit 12 may be functionally provided separately from the transmission unit and the reception unit.
- the buffer unit 13 temporarily holds UL reception data and / or DL transmission data.
- the timer management unit 15 generates a TA (Time Alignment) value as an example of transmission timing adjustment information that is periodically transmitted (notified) to the UE 20 in order to ensure (maintain) UL synchronization.
- This generation and notification of the TA value is performed for the UE 20 that has performed call setting and allocation of radio resources (UL resources) used by the UE 20 for UL data transmission.
- TA value is one piece of control information used to align (synchronize) UL data transmission timing by the UE 20 and UL data reception timing by the eNB 10. That is, the TA value is used to adjust the UL transmission timing of the UE 20 so that the transmission / reception unit 12 can perform reception processing at an appropriate timing. Therefore, the UE 20 can ensure UL synchronization by adjusting the UL transmission timing according to the TA value received from the eNB 10.
- the TA value is a variable value corresponding to the distance between the eNB 10 and the UE 20 (the position of the UE 20). Therefore, in order for the UE 20 to ensure (maintain) UL synchronization, it is desirable to periodically update the TA value.
- the eNB 10 periodically generates a TA value corresponding to the position of the UE 20 and notifies the UE 20 of the TA value.
- the DL control signal used for this notification is called a TA command.
- a UL control signal received from the UE 20 can be used.
- the control signal used for this measurement is a known signal, for example, SRS (Sounding Reference Signal).
- the timer management unit 15 includes a UL synchronization timer (TA timer) 151.
- the TA timer 151 starts upon transmission (notification) of the TA value to the UE 20.
- the timer management unit 15 monitors the timer value. Since the UE 20 changes its position according to the movement, the TA value notified to the UE 20 is not valid forever. Therefore, the TA timer 151 is monitored for the expiration date of the TA value notified to the UE 20.
- the TA timer 151 is restarted every time a new TA value is generated and notified.
- the UL synchronization determination unit (control unit) 14 monitors the TA timer 151 (timer value) and receives UL confirmation data when receiving UL data or transmitting DL data. It is determined whether or not synchronization is secured (maintained). For example, when the TA timer 151 expires (timeout), it is determined that the UL synchronization is lost even if the actual (lower layer) UL synchronization is secured (maintained).
- the UL resource management unit 16 manages UL resources [for example, channel frequency, time (transmission / reception timing), etc.] used for UL communication (including communication during RA) with the UE 20, and allocation and release thereof. If the OFDMA format is applied to the radio frame, the radio resource management is performed by mapping (mapping) a two-dimensional transmission / reception area (called a burst) defined by a subchannel frequency and a symbol time. It corresponds to managing.
- UL resources for example, channel frequency, time (transmission / reception timing), etc.
- the UL resource includes, for example, an individual UL control channel (PUCCH: Physical-Uplink-Control-Channel) for the UE 20, and an SRS resource used by the eNB 10 for channel estimation, position measurement of the UE 20, and the like. obtain. Further, the PUCCH resource may include a resource used by the UE 20 to transmit CQI (Channel Quality Information) and SRI (Scheduling Request Indicator) to the eNB 10.
- PUCCH Physical-Uplink-Control-Channel
- SRS resource used by the eNB 10 for channel estimation, position measurement of the UE 20, and the like. obtain.
- the PUCCH resource may include a resource used by the UE 20 to transmit CQI (Channel Quality Information) and SRI (Scheduling Request Indicator) to the eNB 10.
- CQI Channel Quality Information
- SRI Service Request Indicator
- the CQI resource is used to report the reception state (quality) of the UE 20 to the eNB 10.
- the eNB 10 can adaptively control DL transmission (transmission data amount, modulation scheme, coding rate, etc.) based on the CQI received from the UE 20.
- the SRI resource is used for the UE 20 to notify the eNB 10 that UL data is generated in the UE 20 when UL synchronization is ensured.
- the UE 20 to which the SRI resource is not allocated can execute RA to notify the eNB 10 of the generation of UL data. Note that, when UL data is generated, the UE 20 in which UL synchronization is not secured can execute RA to notify the eNB 10 of the generation of UL data.
- the UL resource management unit 16 is allowed to release the allocation of the PUCCH resource (CQI resource, SRI resource) and SRS resource allocated to the UE 20 when the TA timer 151 times out.
- the UE 20 illustrated in FIG. 1 exemplarily includes a transmission / reception antenna 21, a transmission / reception unit 22, a buffer 23, a UL synchronization determination unit 24, a timer management unit 25, and a UL resource. And a management unit 26.
- the transmission / reception antenna 21 (hereinafter sometimes simply referred to as “antenna 21”) transmits a UL radio signal to the eNB 10 in a radio area (cell or sector) provided by the eNB 10, while a DL radio transmitted by the eNB 10 Receive a signal.
- the transmission / reception unit 22 performs a predetermined transmission process on UL transmission data (including user data, control data, etc.) addressed to the eNB 10 to generate a radio channel signal, and outputs the signal to the transmission / reception antenna 21.
- the transmission processing includes, for example, encoding of UL transmission data, modulation of encoded data, mapping of a modulation signal to a frame of a predetermined channel, frequency conversion of a frame signal to a radio frequency (up-conversion), radio Frame power amplification, etc. may be included.
- the transmission / reception unit 22 performs a predetermined reception process on the DL radio signal (radio frame) received by the antenna 21 and acquires DL data (including user data, control data, and the like) transmitted by the eNB 10. To do.
- the reception processing may include, for example, low noise amplification of a received signal, frequency conversion (down conversion) to a baseband frequency, gain adjustment, demodulation, decoding, and the like.
- the transmission / reception unit 22 may be functionally provided separately from the transmission unit and the reception unit.
- the buffer unit 23 temporarily holds UL transmission data and / or DL reception data.
- the timer management unit 25 has a UL synchronization timer (TA timer) 251 similar to that in the eNB 10 and manages (monitors) the timer value to monitor the expiration date of the TA value.
- TA timer UL synchronization timer
- the TA timer 251 is started or restarted.
- the TA value of the TA command received from the eNB 10 may be trusted before the RA procedure is started. In this case, it is allowed to ignore the TA value received during the RA procedure, and control without restarting the TA timer 251 is also allowed.
- the timer management unit 25 includes the memory 252 and can store the TA value received from the eNB 10 in the course of the RA procedure in the memory 252 for subsequent application.
- the UL synchronization determination unit (control unit) 24 monitors the TA timer 251 (timer value), and determines whether UL synchronization is ensured (maintained) when performing UL data transmission. When the TA timer 251 times out, it is determined that UL synchronization has been lost. Therefore, when the TA value received from the eNB 10 in the course of the RA procedure is ignored, the TA timer 251 may time out and it may be determined that UL synchronization has been lost during the RA procedure.
- the UL resource management unit 26 manages UL resources allocated from the eNB 10 and release thereof. When the TA timer 251 times out and the UL synchronization determination unit 24 determines that UL synchronization has been lost, the UL resource management unit 26 is allowed to release the allocated UL resource.
- FIG. 2 is a sequence diagram illustrating an example of a contention-based RA procedure.
- FIG. 3 is a flowchart illustrating an example of the contention-based RA procedure in the UE 20
- FIG. 4 is a flowchart illustrating an example of the contention-based RA procedure in the eNB 10.
- the contention-based RA procedure is executed when UL data is generated in the UE 20 (during the initial transmission of the UE 20) or when DL data addressed to the UE 20 arrives at the eNB 10 and a DL data incoming notification is received from the eNB 10 Is done.
- the flowchart in FIG. 3 illustrates the former case, and the flowchart in FIG. 4 illustrates the latter case.
- the UE 20 determines whether UL synchronization is secured by the UL synchronization determination unit 24 (processing 1101 to processing 1103).
- the UE 20 uses the UL resource management unit 26 to select one of a plurality of signatures (preambles) prepared in advance. Select. This is intended to reduce the possibility of selecting the same signature between UEs as much as possible, and various selection methods such as selection according to a generated random number can be adopted.
- the selected signature is included in the message # 1 (RA preamble) and transmitted from the transmission / reception unit 22 to the eNB 10 via the RACH (processing 1011 in FIG. 2 and processing 1104 in FIG. 3).
- the eNB 10 When the eNB 10 receives the message # 1, the eNB 10 transmits a response message # 2 (RA response) to the UE 20 (process 1012 in FIG. 2).
- This RA response # 2 identifies the identifier of one or more signatures that the eNB 10 could receive (discriminate), permission to transmit the UL shared channel corresponding to the signature, and the target of the subsequent RA communication (UE 20). It is possible to include an identifier that is temporarily assigned to. This identifier is called temporary-connection radio network temporary identifier (T-CRNTI).
- the UE 20 When the UE 20 receives the RA response # 2 from the eNB 10 (process 1105 in FIG. 3), the UE 20 checks whether or not the received information includes the signature identifier transmitted in the message # 1.
- the UE 20 performs transmission of the message # 3 (Scheduled ⁇ ⁇ ⁇ ⁇ ⁇ Transmission) based on the transmission permission corresponding to the signature transmitted by the UE 20 included in the RA response # 2 (process 1013 and FIG. 2).
- This message # 3 is a signal including a scheduling request for the eNB 10 and may include system architecture evolution (SAE) -temporary mobile subscriber identity (S-TMSI) as an example of the identification number of the UE 20.
- SAE system architecture evolution
- S-TMSI temporary mobile subscriber identity
- the UE 20 selects a signature, but a plurality of UEs 20 may simultaneously transmit the message # 1 to the eNB 10 using the same signature.
- the eNB 10 cannot identify those UEs 20, but the UE 20 receives signature information (number) (S-TMSI) transmitted in the message # 3, and which UE 20 has a signature conflict. Can be recognized. Therefore, the eNB 10 can select one UE 20 and resolve the conflict.
- the reception electric field strength of message # 1 can be used as the selection criterion. For example, the eNB 10 selects the UE 20 having the received electric field strength of the message # 1 that is higher than the others.
- the eNB 10 transmits message # 4 (Contention Resolution) to the UE 20 to the UE 20 selected by the conflict resolution (process 1014 in FIG. 2).
- This message # 4 can include information such as S-TMSI transmitted in message # 3.
- the UE 20 Upon receiving the message # 4 from the eNB 10 (process 1107 in FIG. 3), the UE 20 checks whether or not there is a conflict with another UE 20 (checks whether its own identification information is included) (process 1108 in FIG. 3). If there is no conflict, the UL connection process is completed (no route of process 1108 in FIG. 3). Thereafter, the UE 20 uses the temporarily assigned temporary identifier (T-CRNTI) as a definitive identifier [C (cell) -RNTI] for communication with the eNB 10.
- T-CRNTI temporary identifier
- the UE 20 is designated by the back-off.
- the process waits for a predetermined time (process 1111).
- the back-off is information that specifies the timing (waiting time) at which the UE 20 retries the contention-based RA procedure.
- the back-off parameter is notified by message # 2, and by changing this back-off for each UE 20, it is possible to reduce the probability that contention will occur again at the time of retry.
- the maximum back-off time is notified by message # 2, and the UE 20 calculates the back-off time within the time range. For this calculation, various calculation methods such as using a random number can be employed.
- the UE 20 checks whether or not the number of retries exceeds the maximum number due to the retry of the next RA procedure (process 1112). If not exceeded (if no in process 1112), the UE 20 executes the process after the process 1103 and retries the RA procedure (transmits message # 1). When exceeding (in the case of yes in the process 1112), the UE 20 notifies the upper layer to that effect (process 1113).
- the upper layer is, for example, a radio resource control (RRC) layer belonging to layer 3.
- RRC radio resource control
- the upper layer that has received the notification activates a monitoring timer that monitors RA continuation (retry).
- a monitoring timer that monitors RA continuation (retry).
- the upper layer of the UE 20 executes control (cell selection control or cell reselection control) for reselecting the UL connection request (transmission of message # 1) destination eNB 10 (cell).
- the UE 20 checks whether or not a PUCCH resource (SRI resource) has been allocated (process 1109). If it has been assigned (if yes in process 1109), the UE 20 transmits an SRI (UL data transmission request) to the eNB 10 using the SRI resource (process 1110).
- SRI resource PUCCH resource
- the UE 20 transmits message # 1 to the eNB 10 and executes the RA procedure. That is, even when it is determined in the processing 1103 that synchronization has been established, there is a case where the RA procedure is executed when there is no SR PUCCH resource.
- the RA procedure by the eNB 10 when the DL data addressed to the UE 20 arrives at the eNB 10 and the incoming notification of the DL data is made from the eNB 10 to the UE 20 is as illustrated in FIG.
- the eNB 10 determines whether UL synchronization is secured by the UL synchronization determination unit 14 (process 1202 and process 1203). If UL synchronization is not ensured (if no in process 1203), the eNB 10 notifies the UE 20 that DL data has arrived (process 1204).
- This notification can include an individual preamble, but in this embodiment, an individual signature (individual preamble) is not included in the UE 20. Therefore, the UE 20 that has received the incoming call notification executes the contention-based RA procedure described above. At that time, if there is a UL resource allocated before, the UL resource is released, and a new UL resource is allocated from the eNB 10 after RA success.
- the eNB 10 When the eNB 10 receives the message # 1 (RA preamble) from the UE 20 that has started the contention-based RA procedure (process 1205), the eNB 10 returns a response (message # 2) to the UE 20 (process 1206).
- message # 1 RA preamble
- the eNB 10 returns a response (message # 2) to the UE 20 (process 1206).
- the eNB 10 checks whether there is a message collision (process 1208), and if not, transmits the message # 4 to the UE 20 (the no route of the process 1208). To processing 1209). If there is a message collision (if yes in process 1208), the eNB 10 ends the RA procedure without transmitting message # 4.
- the above is the basic procedure for contention-based RA.
- the eNB 10 cannot accurately manage the value of the TA timer 251 in the UE 20 (the timer values of the TA timer 151 of the eNB 10 and the TA timer 251 of the UE 20 are not synchronized).
- the TA timer 251 of the UE 20 keeps timing, but since the eNB 10 does not know the continuation, the eNB 10 erroneously recognizes that the TA timer 251 of the UE 20 has timed out. Think.
- FIGS. 5 to 7 Examples are shown in FIGS. 5 to 7 (FIGS. 9 to 11, FIGS. 13 to 15, and 17 to 19).
- the eNB 10 When the eNB 10 performs call setup and UL resource (for example, SRI resource # 1, CQI resource # 1, SRS resource # 1) allocation to the UE 20 (process 1008), the eNB 10 periodically transmits a TA command to the UE 20. (Processing 1009).
- the eNB 10 When the UE 20 performs UL transmission based on TA # 1 notified by the TA command, and the DL data addressed to the UE 20 arrives at the eNB 10 after the transmission ends, the eNB 10 notifies the UE 20 of an incoming call notification (message (Transmission of # 0) is performed (process 1010). Receiving this incoming call notification # 0, the UE 20 starts a contention-based RA procedure in order to ensure UL synchronization and resources.
- UE20 transmits message # 1 containing the selected signature (random preamble) to eNB10 (process 1011), and eNB10 which received this message # 1 returns RA response # 2 to UE20 (process 1012). .
- the eNB 10 includes a new TA value (TA # 2; second timing adjustment information) in the RA response # 2.
- the UE 20 that has received the RA response # 2 can restart the TA timer 251 by applying the new TA # 2, but can also ignore the TA # 2 as described above. If ignored, the TA timer 251 may time out between the subsequent transmission of message # 3 (process 1013) and the reception of message # 4 (process 1014).
- the UE 20 secures UL synchronization using any one of the following four methods 1-1 to 1-4.
- Method 1-1 (1.4.1) Method 1-1 (FIGS. 5 to 8) As illustrated in FIG. 8, the UE 20 stores the TA value (TA # 2) received by the message # 2 in the course of the contention-based RA procedure in the memory 252 of the timer management unit 25 (processing 1105a). .
- the UE 20 When the UE 20 (UL resource management unit 26) recognizes that UL synchronization has been lost, the UE 20 (UL resource management unit 26) used the transmission process based on TA # 1 received before starting the contention-based RA (assigned from the eNB 10 before starting the RA). (Reserved) UL resources can be released.
- the release timing may be, for example, the timing at which the incoming call notification message # 0 is received (the timing at which it is recognized that the UL synchronization management does not match the eNB 10) (Processing 2001), as illustrated in FIG. However, as shown in FIG. 6, the timing when the TA timer 251 times out (processing 2002) may be used. However, as illustrated in FIG. 7, even if the TA timer 251 times out, the UL resource can be secured (continuously used) without being released (process 2003).
- the UE 20 applies the TA value (TA # 2) stored in the memory 252 to the UL transmission and the TA timer 251. Is restarted (from the no route of the processing 1108 to the processing 1114).
- the application of TA # 2 is triggered by the fact that UE 20 receives message # 2 (response signal) including T-CRNTI as an example of its own identification information in the RA process after the TA timer 251 times out.
- “Applying the TA value” means controlling UL transmission (execution of RA) based on the transmission timing indicated by the TA value. This control can be realized, for example, as a function of the UL synchronization determination unit 24 (the same applies hereinafter).
- the value of the TA timer 251 may be a specified value, or may be set based on the reception timing of the message # 2. For example, assuming that UL synchronization was already successful when message # 2 was received, the value of TA timer 251 is set by subtracting the time required from message # 2 to message # 4 from the specified value. May be. This means that the timer value (expiration date of timing adjustment information) is advanced by the time from when the notification of TA # 2 is received by message # 2 until the result of RA is notified.
- TA # 1 For transmission processing up to (expiration date), TA # 1 is applied to adjustment of transmission timing.
- TA # 2 is applied to adjustment of transmission timing.
- the UE 20 returns an acknowledgment message (ACK or NACK) to the message # 4 to the eNB 10 (process 1015). If the eNB 10 receives ACK as an acknowledgment message for the message # 4, the eNB 10 allocates new UL resources (for example, SRI resource # 2, CQI resource # 2, SRS resource # 2) to the UE 20 (process 1016).
- ACK acknowledgment message
- NACK new UL resources
- the UE 20 may continue to use the already reserved UL resource. It is also possible to request the eNB 10 to allocate a new UL resource instead of (Processing 1017).
- the UE 20 manages the allocated UL resource in the UL resource management unit 26, and thereafter performs UL transmission to the eNB 10 using the UL resource.
- the UE 20 applies the TA value (TA # 2) stored in the memory 252 to the UL transmission without waiting for the reception of the message # 4, and restarts the TA timer 251 (in the processing 1161 in FIG. 12). From the yes route, process 1162).
- the restart timing may be simultaneous with the timeout of the TA timer 251. That is, application of TA # 2 received by message # 2 is allowed at the timing of TA timer 251 timeout (TA # 1 expiration date).
- transmission control can be performed by applying TA # 2 when the expiration date of TA # 1 has passed (when time-out occurs).
- Method 1-3 As a third method, as illustrated in FIGS. 13 to 16, when the eNB 10 transmits the message # 4, the new TA value (TA # 3) is included (see FIGS. 13 to 15). Process 1014a, process 1107a in FIG.
- TA # 1 first transmission timing adjustment information
- the eNB 10 transmits message # 4 (identification of the UE 20) to the UE 20 during the RA process.
- TA # 3 second transmission timing adjustment information
- S-TMSI fourth transmission timing adjustment information
- the UE 20 When receiving this message # 4 from the eNB 10, the UE 20 applies the TA value (TA # 3) included in the message # 4 to the UL transmission and starts the TA timer 251 (process 1114 in FIG. 16).
- the message # 4 including the identification information of the mobile station does not include the TA value, but in this embodiment, the message # 4 is received by the message # 2 by including the TA value.
- the UE 20 ignoring the TA # 2 can apply the TA value of the message # 4 as the adjustment information of the subsequent transmission timing and start the TA timer 251.
- the UE 20 may store the ignored TA # 2 in the memory 252.
- Method 1-4 (1.4.4) Method 1-4 (FIGS. 17 to 20) As a fourth method, as illustrated in FIGS. 17 to 20, the UE 20 receives the message # 2 regardless of whether or not it stores the TA value (TA # 2) received from the eNB 10 in the message # 2. At this time, the TA timer 251 is restarted.
- the UE 20 continues to apply the TA value (TA # 1) received from the eNB 10 before the start of the RA procedure to the subsequent RA (UL transmission) (process 1105b in FIG. 20).
- This is equivalent to controlling the TA timer 251 so that the validity period of the UL transmission timing received from the eNB 10 from the eNB 10 before the RA start is extended during the RA process.
- the UE 20 when the UE 20 performs RA for the eNB 10 based on TA # 1, and receives TA # 2 in the process of RA, the UE 20 continues TA # 1 without applying TA # 2. Apply and extend the expiration date of TA # 1.
- the extended period (the value of the TA timer 251 for TA # 2) may be a specified value, or may be set based on the reception timing of message # 2.
- the value of the TA timer 251 may be set by subtracting the time required from the reception of the message # 2 to the TA # 1 timeout.
- TA # 1 can be continuously extended and used, and can be applied to adjustment of transmission timing.
- the UE 20 since the UE 20 cannot transmit UL data other than the RACH, the UE 20 tries to ensure UL synchronization by executing a contention-based RA retry (process 1108 in FIG. 3).
- Contention-based RA transmission of message # 1: process 1011
- the message # 3 (a signal including S-TMSI as an example of identification information of the UE 20)
- the TA timer 251 may time out before the transmission.
- the UE 20 determines that UL synchronization has been lost, but continues RA by any one of the following methods 2-1 to 2-4.
- the transmission process of the message # 3 to the eNB 10 can be executed based on the TA # 1.
- the UE 20 can continue the subsequent RA procedure without redoing the contention-based RA from the beginning. That is, if the UE 20 succeeds in receiving the message # 4 including its identification information as a response signal to the message # 3, the UE 20 applies the TA # 2 to the adjustment of the transmission timing of the subsequent transmission processing, and sets the TA timer 251. You can start. Therefore, it is possible to reduce a delay until the UL data transmission starts.
- the eNB 10 can recognize that the UE 20 has forcibly transmitted the message # 3, that is, a violation of the regulations, the eNB 10 can also transmit a connection rejection message to the UE 20 with the message # 4. That is, the eNB 10 can transmit a rejection message to the UE 20 when receiving the message # 3 transmitted from the UE 20 based on the TA # 1 after the expiration date of the TA # 1 has passed.
- the UE 20 performs cell selection / reselection or retry of the RA procedure.
- the eNB 10 may not intentionally transmit the message # 4.
- the UE 20 continues to retransmit the message # 3 until the allowable number of retransmissions (the normal maximum number of retransmissions or the maximum number of retransmissions applied only in this case) is reached.
- the expiration date of TA # 1 is a signal including S-TMSI as an example of identification information of UE20. If it arrives before the transmission process is performed, RA is canceled even if TA # 2 is received before the expiration date of TA # 1 arrives.
- the UE 20 applies a back-off and performs a contention-based RA retry (yes route of the process 1105d). That is, the RA retry is executed at a timing based on the back-off time (waiting time information) received from the eNB 10 during the canceled RA process. As illustrated in FIGS. 25 to 27, the UE 20 transmits the message # 1 (process 1011), receives the message # 2 (TA # 3) (process 1012), and the like.
- the TA timer 251 has timed out (not started). Therefore, the UE 20 can start the TA timer 251 by applying the new TA # 3 received by the message # 2 during the retryed RA process to the adjustment of the transmission timing of the subsequent UL transmission.
- the TA timer 251 may be forcibly terminated (process 2004 in FIGS. 25 to 27).
- the RA procedure is canceled and the RA is retried, so that the remaining procedure (for example, transmission of message # 3 and reception of message # 4) is completed.
- the delay until the start of UL data transmission can be reduced.
- the UE 20 can execute the RA retry without applying the back-off time received from the eNB 10 during the canceled RA process.
- the back-off it is possible to reduce the delay until the start of UL data transmission, compared to the case where the back-off is applied.
- Method 2-4 (2.4) Method 2-4 (FIGS. 30 to 33) Further, as illustrated in FIGS. 30 to 32, when the TA timer 251 times out, the UE 20 may notify a higher layer (for example, the RRC layer) regardless of whether the backoff is appropriate (processing 1021). From the yes route of the process 1105d in FIG. 33, the process 1113).
- a higher layer for example, the RRC layer
- the upper layer of the UE 20 starts the RA monitoring timer and monitors the continuation (retry) of the RA procedure. That is, the UE 20 monitors the RA according to the timeout of the TA timer 251 (TA # 1 expiration date has arrived). If the monitoring timer times out while RA is continuing, the upper layer of UE 20 performs cell selection or cell reselection processing (processing 1022 in FIGS. 30 to 32).
- the UE 20 can start RA with another cell (eNB 10) at an early stage, and can reduce the delay until the start of UL data transmission.
- the RA monitoring by the higher layer according to the timeout of the TA timer 251 may be applied to the above methods 2-1 to 2-3.
- the eNB 10 notifies the UE 20 of the incoming call (transmission of message # 0) To do.
- the UE 20 that has received the incoming notification starts a contention-based RA procedure.
- the UE 20 performs any of the following methods 3-1 to 3-3.
- UL synchronization is ensured.
- Method 3-1 The UE 20 stores the TA value received in the message # 2 from the eNB 10 in the course of the RA procedure in the memory 252 as in the method 1-2 (FIGS. 9 to 12) described in the first embodiment.
- the TA timer 251 times out before transmitting message # 3 to the eNB 10
- the TA value stored in the memory 252 is applied to UL transmission and the TA timer 251 is started.
- Method 3-3 (FIGS. 34 to 37) As illustrated in FIGS. 34 and 35, when the UE 20 performs RA for the eNB 10 based on TA # 1, a signal including S-TMSI as an example of identification information of the UE 20 in the process of RA. (Message # 3) is transmitted (process 1013).
- the eNB 10 When the eNB 10 receives the message # 3 from the UE 20 in the RA process before the TA timer 251 of the UE 20 times out (process 1013), the eNB 10 receives a new TA value (TA # 3; The TA command including the second timing adjustment information is transmitted to the UE 20 (process 1009a, process 1208a in FIG. 36).
- the UE 20 monitors (monitors) reception of the TA command even while the RA is being executed. For example, after transmitting message # 3 to the eNB 10 (process 1013), the reception of the TA command from the eNB 10 is monitored. If a TA command is received from the eNB 10 during this monitoring (process 1009a, process 1161 in FIG. 37), the UE 20 (timer management unit 25) applies the TA value (TA # 3) of the received TA command to the UL transmission. The TA timer 251 is started (process 1162 in FIG. 37).
- the management of UL resources in the UE 20 may be the same as in the first or second embodiment.
- the UL resource reserved so far may be released at the timing when the DL data arrival notification (message # 0) is received from the eNB 10, or the UL resource is released when the TA timer 251 times out. May be.
- the UL resources that have been secured up to that point must be maintained (continuously used). Is also possible (process 2005 in FIG. 35).
- UE 20 has the same form as in the first embodiment (any one of method 1-1 to method 1-4). Can be applied.
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Abstract
Description
なお、RACHは、通信開始時に使用され、以降は個別チャネル(または共有チャネル)が使用される。
3GPP TS 36.321 V8.1.0、"Evolved Universal Terrestrial Radio Accesss (E-UTRA); Medium Acces Control (MAC) protocol specification"、[online]、平成20年3月20日、[平成20年5月22日検索]、インターネット〈URL:http://www.3gpp.org/ftp/Specs/html-info/36321.htm〉
他の目的の一つは、移動局が基地局に接続して通信を開始できるようになるまでの遅延時間を低減することにある。
(1)送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおけるタイミング調整方法において、前記移動局が、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、第2の送信タイミング調整情報を受信すると、前記第1の送信タイミング調整情報の有効期限までの送信処理に対しては、前記第1の送信タイミング調整情報を送信タイミングの調整に適用し、前記第1の送信タイミング調整情報の有効期限後の送信処理に対しては、前記第2の送信タイミング調整情報を送信タイミングの調整に適用する、タイミング調整方法を用いることができる。
移動局が基地局に接続して通信を開始できるようになるまでの遅延時間を低減することも可能である。
11 送受信アンテナ
12 送受信部
13 バッファ部
14 UL同期判定部
15 タイマ管理部
151 UL同期タイマ(TAタイマ)
16 ULリソース管理部
20 無線端末(UE)
21 送受信アンテナ
22 送受信部
23 バッファ部
24 UL同期判定部
25 タイマ管理部
251 UL同期タイマ(TAタイマ)
252 メモリ
26 ULリソース管理部
図1は、第1実施形態に係る無線(移動)通信システムの一例を示すブロック図である。この図1に例示するシステムは、無線基地局の一例としてのeNB10と、eNB10の無線エリアにおいて無線リンクを介してeNB10と通信する、無線端末(移動局)の一例としてのUE20と、をそなえる。
eNB10は、例示的に、送受信アンテナ11と、送受信部12と、バッファ13と、UL同期判定部14と、タイマ管理部15と、ULリソース管理部16と、をそなえる。
一方、図1に示すUE20は、例示的に、送受信アンテナ21と、送受信部22と、バッファ23と、UL同期判定部24と、タイマ管理部25と、ULリソース管理部26と、をそなえる。
以下、上述したeNB10とUE20との間の基本的な接続処理の一例としてのコンテンションベースRA手順について、図2~図4を用いて説明する。図2は、コンテンションベースRA手順の一例を示すシーケンス図である。図3は、UE20におけるコンテンションベースRA手順の一例を示すフローチャート、図4は、eNB10におけるコンテンションベースRA手順の一例を示すフローチャートである。
他UE20との競合が生じていなかった場合(RAが成功した場合)、RAを実行したUE20に個別のULリソースが確保できたことを示す。しかし、TAタイマ251はタイムアウトした状態であるため、UL同期が確保できたとはいえない。
UE20は、図8に例示するように、コンテンションベースRA手順の過程で前記メッセージ#2により受信したTA値(TA#2)をタイマ管理部25のメモリ252に記憶しておく(処理1105a)。
第2の方法として、図9~図12に例示するように、UE20は、メッセージ#2で受信したTA値(TA#2)をメモリ252に記憶しておく(処理1105a)。その後、メッセージ#3の送信(処理1013)からメッセージ#4の受信(処理1014)までの間にTAタイマ251がタイムアウトしたとする。
第3の方法として、図13~図16に例示するように、eNB10が、メッセージ#4を送信する際には、新しいTA値(TA#3)を含めることとする(図13~図15の処理1014a、図16の処理1107a)。
第4の方法として、図17~図20に例示するように、UE20は、eNB10からメッセージ#2で受信したTA値(TA#2)を記憶するか否かに関わらず、メッセージ#2の受信を契機としてTAタイマ251をリスタートする。
メッセージ#4の受信時に他UE20との競合が生じている場合は、他UE20が用いるULリソースとの重複が発生しており、自局20に個別のULリソースは確保できなかったことを意味する。
上述した第1実施形態では、UE20がメッセージ#3を送信してからメッセージ#4をeNB10から受信するまでの間に、UE20のTAタイマ251がタイムアウトした場合を想定した。本実施形態では、UE20がeNB10からメッセージ#2を受信してからeNB10に対してメッセージ#3を送信するまでの間に、UE20のTAタイマ251がタイムアウトする場合を想定する。
UE20において、UL同期が外れたと判定した場合、本来的にはメッセージ#3の送信は行なえない。しかし、TAタイマ251は、物理レイヤにおけるUL同期が外れない範囲のフェイルセーフに設定される場合が多い。したがって、TAタイマ251がタイムアウトしても、実際の(下位レイヤの)UL同期は確保できている場合もある。
UE20は、図25~図27に例示するように、メッセージ#2(TA#2)を受信(処理1013)した後、メッセージ#3をeNB10へ送信(処理1013)する前に、TAタイマ251が満了した場合、メッセージ#3の送信はキャンセルして、実行中のコンテンションベースRA手順を中止(キャンセル)する(処理1018)。
なお、上述のごとくTAタイマ251がタイムアウトして、コンテンションベースRAをリトライする場合、図29に例示するように、UE20は、バックオフを適用せずに前記リトライを行なってもよい(処理1105dのyesルート)。
また、図30~図32に例示するように、TAタイマ251がタイムアウトした場合、UE20は、バックオフの適否に関わらず、上位レイヤ(例えば、RRCレイヤ)に通知を行なってもよい(処理1021、図33の処理1105dのyesルートから処理1113)。
次に、本実施形態では、eNB10が、UE20におけるTAタイマ251のタイマ値を正確に管理できている場合(eNB10及びUE20の両TAタイマ151,251が同期している場合)を想定する。この場合、UE20のTAタイマ251の計時が継続していることを、eNB10は認識できるから、UE20は、eNB10から受信されるTA値を信頼してよい。さらに、第1実施形態および第2実施形態とは異なり、eNB10からTA値が送信されることが期待できる。
UE20は、第1実施形態で述べた方法1-2(図9~図12)と同様に、RA手順の過程でeNB10からメッセージ#2で受信したTA値をメモリ252に記憶しておく。そして、メッセージ#3をeNB10に送信する前にTAタイマ251がタイムアウトすると、メモリ252に記憶しておいたTA値をUL送信に適用して、TAタイマ251をスタートする。
UE20は、第2実施形態で述べた方法2-1~2-4のいずれかを実行する。
図34及び図35に例示するように、UE20は、TA#1に基づいてeNB10に対するRAを行なっている場合に、そのRAの過程で、UE20の識別情報の一例としてのS-TMSIを含む信号(メッセージ#3)を送信する(処理1013)。
Claims (38)
- 送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおけるタイミング調整方法において、
前記移動局が、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、第2の送信タイミング調整情報を受信すると、前記第1の送信タイミング調整情報の有効期限までの送信処理に対しては、前記第1の送信タイミング調整情報を送信タイミングの調整に適用し、前記第1の送信タイミング調整情報の有効期限後の送信処理に対しては、前記第2の送信タイミング調整情報を送信タイミングの調整に適用する、
ことを特徴とする、タイミング調整方法。 - 前記第2の送信タイミング調整情報の適用は、前記第1の送信タイミング調整情報の有効期限後、前記接続処理の過程において前記移動局が該移動局の識別情報を含む応答信号を受信したことを契機として許容される、
ことを特徴とする、請求項1記載のタイミング調整方法。 - 前記第2の送信タイミング調整情報の適用は、前記第1の送信タイミング調整情報の有効期限のタイミングで許容される、
ことを特徴とする、請求項1記載のタイミング調整方法。 - 前記移動局は、前記接続処理の過程で受信した前記第2の送信タイミング情報を、前記適用にそなえて記憶しておく、ことを特徴とする、請求項1~3のいずれか1項に記載のタイミング調整方法。
- 前記第2の送信タイミング調整情報の有効期限は、前記第2のタイミング調整情報の受信タイミングに基づいて設定される、ことを特徴とする、請求項1~4のいずれか1項に記載のタイミング調整方法。
- 送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおけるタイミング調整方法において、
前記移動局が、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、前記接続処理の過程において前記基地局から該移動局に送信される該移動局の識別情報を含む信号に第2の送信タイミング調整情報を含める、
ことを特徴とする、タイミング調整方法。 - 前記移動局は、前記基地局から受信した前記信号に含まれる第2の送信タイミング調整情報を、その後の送信処理の送信タイミングの調整に適用する、ことを特徴とする、請求項6記載のタイミング調整方法。
- 送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおけるタイミング調整方法において、
前記移動局は、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、第2の送信タイミング調整情報を受信すると、該第2の送信タイミング調整情報を適用せずに、前記第1の送信タイミング調整情報を継続して適用するとともに、該第1の送信タイミング調整情報の有効期限を延長する、
ことを特徴とする、タイミング調整方法。 - 送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおけるタイミング調整方法において、
前記移動局は、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、該第1の送信タイミング調整情報の有効期限が、該移動局の識別情報を含む信号の送信処理を行なう前に到来すると、該信号の送信処理を前記第1の送信タイミング調整情報に基づいて実行する、
ことを特徴とする、タイミング調整方法。 - 前記移動局は、前記信号に対する応答信号を前記基地局から受信すると、前記接続処理の過程で前記基地局から受信した第2の送信タイミング調整情報をその後の送信処理の送信タイミングの調整に適用する、ことを特徴とする、請求項9記載のタイミング調整方法。
- 前記有効期限が過ぎた後に前記移動局から前記第1の送信タイミング調整情報に基づいて送信された信号を前記基地局が受信した場合に、該基地局は、拒否メッセージを該移動局に送信する、
ことを特徴とする、請求項9又は10に記載のタイミング調整方法。 - 前記第1の送信タイミング調整情報の有効期限の到来に応じて、前記接続処理の監視を行なう、
ことを特徴とする、請求項9~11のいずれか1項に記載のタイミング調整方法。 - 送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおけるタイミング調整方法において、
前記移動局は、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、該第1の送信タイミング調整情報の有効期限が、該移動局の識別情報を含む信号の送信処理を行なう前に到来すると、前記接続処理を中止する、
ことを特徴とする、タイミング調整方法。 - 前記接続処理の中止後、接続処理を再試行する、
ことを特徴とする、請求項13記載のタイミング調整方法。 - 前記再試行する接続処理は、前記中止前に前記基地局から受信した待機時間情報に基づくタイミングで実行される、ことを特徴とする、請求項14記載のタイミング調整方法。
- 前記再試行する接続処理は、前記中止前に前記基地局から受信した待機時間情報を適用しないで実行される、ことを特徴とする、請求項14記載のタイミング調整方法。
- 前記移動局は、前記再試行した接続処理の過程で新たな送信タイミング情報を前記基地局から受信すると、前記新たな送信タイミング情報をその後の送信処理の送信タイミングの調整に適用する、ことを特徴とする、請求項14~16のいずれか1項に記載のタイミング調整方法。
- 前記第1の送信タイミング調整情報の有効期限の到来に応じて、前記接続処理の監視を行なう、
ことを特徴とする、請求項13記載のタイミング調整方法。 - 前記移動局は、前記接続処理の開始前の送信処理に用いていた無線リソースを、前記基地局からの着信通知を受信したタイミングで解放する、ことを特徴とする、請求項1,6,8,9,13のいずれか1項に記載のタイミング調整方法。
- 前記移動局は、前記接続処理の開始前の送信処理に用いていた無線リソースを、前記有効期限のタイミングで解放する、ことを特徴とする、請求項1,6,8,9,13のいずれか1項に記載のタイミング調整方法。
- 前記移動局は、前記接続処理の開始前の送信処理に用いていた無線リソースを、前記有効期限が到来しても解放しない、ことを特徴とする、請求項1,6,8,9,13のいずれか1項に記載のタイミング調整方法。
- 前記移動局は、前記接続処理の終了後に、前記解放しない無線リソースに代わる新たな無線リソースの割り当てを前記基地局に要求する、ことを特徴とする、請求項21記載のタイミング調整方法。
- 送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおけるタイミング調整方法において、
前記移動局が、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、該移動局の識別情報を含む信号を送信し、前記基地局が該信号を受信すると、前記基地局は、該信号の受信を契機として、第2の送信タイミング調整情報を前記移動局に送信する、
ことを特徴とする、タイミング調整方法。 - 前記移動局は、前記識別情報を含む信号を送信した後、前記第2の送信タイミング調整情報の受信を監視する、ことを特徴とする、請求項23記載のタイミング調整方法。
- 前記移動局は、前記接続処理の開始前の送信処理に用いていた無線リソースを、前記第1の送信タイミング調整情報の有効期限のタイミングで解放する、ことを特徴とする、請求項23又は24に記載のタイミング調整方法。
- 前記移動局は、前記接続処理の開始前の送信処理に用いていた無線リソースを、前記第1の送信タイミング調整情報の有効期限が前記第2の送信タイミング調整情報を受信する以前に到来しても解放しない、ことを特徴とする、請求項23又は24に記載のタイミング調整方法。
- 移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおける前記移動局であって、
送信タイミング調整情報に基づいて、前記基地局に対する送信処理を行なう送信処理部と、
第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、第2の送信タイミング調整情報を受信すると、前記第1の送信タイミング調整情報の有効期限までの前記送信処理部による送信処理に対しては、前記第1の送信タイミング調整情報を送信タイミングの調整に適用し、前記第1の送信タイミング調整情報の有効期限後の前記送信処理部による送信処理に対しては、前記第2の送信タイミング調整情報を送信タイミングの調整に適用する制御部と、
をそなえたことを特徴とする、移動局。 - 送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおける前記基地局であって、
前記移動局が、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、前記接続処理の過程において前記移動局へ送信する、該移動局の識別情報を含む信号に、第2の送信タイミング調整情報を含める制御部、
をそなえたことを特徴とする、基地局。 - 移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおける前記移動局であって、
送信タイミング調整情報に基づいて、前記基地局に対する送信処理を行なう送信処理部と、
第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、第2の送信タイミング調整情報を受信すると、該第2の送信タイミング調整情報を適用せずに、前記第1の送信タイミング調整情報を継続して適用するとともに、該第1の送信タイミング調整情報の有効期限を延長する制御部と、
をそなえたことを特徴とする、移動局。 - 移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおける前記移動局であって、
送信タイミング調整情報に基づいて、前記基地局に対する送信処理を行なう送信処理部と、
第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、該第1の送信タイミング調整情報の有効期限が、該移動局の識別情報を含む信号の送信処理を行なう前に到来すると、該信号の送信処理を前記第1の送信タイミング調整情報に基づいて実行する制御部と、
をそなえたことを特徴とする、移動局。 - 移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおける前記移動局であって、
送信タイミング調整情報に基づいて、前記基地局に対する送信処理を行なう送信処理部と、
第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、該第1の送信タイミング調整情報の有効期限が、該移動局の識別情報を含む信号の送信処理を行なう前に到来すると、前記接続処理を中止する制御部と、
をそなえたことを特徴とする、移動局。 - 送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおける前記基地局であって、
該移動局から送信された信号を受信する受信処理部と、
前記移動局が、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、該移動局の識別情報を含む信号を前記受信処理部で受信すると、該信号の受信を契機として、第2の送信タイミング調整情報を前記移動局に送信する制御部と、
をそなえたことを特徴とする、基地局。 - 送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおいて、
前記移動局が、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、第2の送信タイミング調整情報を受信すると、前記第1の送信タイミング調整情報の有効期限までの送信処理に対しては、前記第1の送信タイミング調整情報を送信タイミングの調整に適用し、前記第1の送信タイミング調整情報の有効期限後の送信処理に対しては、前記第2の送信タイミング調整情報を送信タイミングの調整に適用する、
ことを特徴とする、移動通信システム。 - 送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおいて、
前記移動局が、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、前記接続処理の過程において前記基地局から該移動局に送信される該移動局の識別情報を含む信号に第2の送信タイミング調整情報を含める、
ことを特徴とする、移動通信システム。 - 送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおいて、
前記移動局は、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、第2の送信タイミング調整情報を受信すると、該第2の送信タイミング調整情報を適用せずに、前記第1の送信タイミング調整情報を継続して適用するとともに、該第1の送信タイミング調整情報の有効期限を延長する、
ことを特徴とする、移動通信システム。 - 送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおいて、
前記移動局は、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、該第1の送信タイミング調整情報の有効期限が、該移動局の識別情報を含む信号の送信処理を行なう前に到来すると、該移動局の識別情報を含む信号の送信処理を前記第1の送信タイミング調整情報に基づいて実行する、
ことを特徴とする、移動通信システム。 - 送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおいて、
前記移動局は、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、該第1の送信タイミング調整情報の有効期限が、該移動局の識別情報を含む信号の送信処理を行なう前に到来すると、前記接続処理を中止する、
ことを特徴とする、移動通信システム。 - 送信タイミング調整情報に基づいて、送信処理を行なう移動局と、該移動局から送信された信号を受信する基地局とを備えた移動通信システムにおいて、
前記移動局が、第1の送信タイミング調整情報に基づいて前記基地局に対する接続処理を行なっている場合に、該接続処理の過程で、該移動局の識別情報を含む信号を送信し、前記基地局が該信号を受信すると、前記基地局は、該信号の受信を契機として、第2の送信タイミング調整情報を前記移動局に送信する、
ことを特徴とする、移動通信システム。
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EP08777102.8A EP2288223B1 (en) | 2008-06-02 | 2008-06-02 | Method for timing adjustment, mobile station, base station, and mobile communication system |
EP12151699.1A EP2445280B1 (en) | 2008-06-02 | 2008-06-02 | Timing adjustment method, user equipment, base station, and mobile communication system |
CN200880129608.7A CN102047737B (zh) | 2008-06-02 | 2008-06-02 | 定时调节方法、移动站、基站以及移动通信系统 |
PCT/JP2008/060151 WO2009147709A1 (ja) | 2008-06-02 | 2008-06-02 | タイミング調整方法、移動局、基地局および移動通信システム |
JP2010515679A JP5003820B2 (ja) | 2008-06-02 | 2008-06-02 | タイミング調整方法、移動局および移動通信システム |
KR1020117006620A KR101171624B1 (ko) | 2008-06-02 | 2008-06-02 | 타이밍 조정 방법, 이동국, 기지국 및 이동 통신 시스템 |
KR1020127033347A KR101240033B1 (ko) | 2008-06-02 | 2008-06-02 | 타이밍 조정 방법, 이동국, 기지국 및 이동 통신 시스템 |
EP12151700.7A EP2445281B1 (en) | 2008-06-02 | 2008-06-02 | Method for timing adjustment, mobile station, base station and mobile communication system |
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US13/079,265 US8768392B2 (en) | 2008-06-02 | 2011-04-04 | Timing adjustment method, user equipment, base station, and mobile communication system |
US13/736,712 US9037177B2 (en) | 2008-06-02 | 2013-01-08 | Timing adjustment method in a mobile communication system that performs an adjustment of uplink transmission timing by random access between a user equipment and a base station |
US13/736,719 US9191933B2 (en) | 2008-06-02 | 2013-01-08 | Timing adjustment method in a mobile communication system that performs an adjustment of uplink transmission timing by random access between a user equipment and a base station |
US13/862,092 US9055575B2 (en) | 2008-06-02 | 2013-04-12 | Base station, in a mobile communication system that performs an adjustment of uplink transmission timing by random access between a user equipment and the base station |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011123706A1 (en) * | 2010-03-31 | 2011-10-06 | Qualcomm Incorporated | User equipment based method to improve synchronization shift command convergence in td-scdma uplink synchronization |
JP2012504377A (ja) * | 2008-09-29 | 2012-02-16 | リサーチ イン モーション リミテッド | 通信システムにおける使用のためのアップリング再同調 |
WO2012048570A1 (zh) * | 2010-10-11 | 2012-04-19 | 中兴通讯股份有限公司 | 一种lte系统中上行发射定时控制方法与装置 |
WO2012077237A1 (ja) * | 2010-12-10 | 2012-06-14 | 富士通株式会社 | 無線通信システム、受信装置、送信装置および無線通信方法 |
JP2012248959A (ja) * | 2011-05-25 | 2012-12-13 | Fujitsu Ltd | 基地局、及びユーザ端末並びに通信方法 |
JP2012533211A (ja) * | 2009-07-07 | 2012-12-20 | テレフオンアクチーボラゲット エル エム エリクソン(パブル) | 復調基準信号の循環シフトを使用するランダム・アクセス・プロシージャ |
JP2013021496A (ja) * | 2011-07-11 | 2013-01-31 | Fujitsu Ltd | 移動局、及び送信制御方法 |
WO2013024997A2 (ko) * | 2011-08-16 | 2013-02-21 | 엘지전자 주식회사 | 기지국 협력 무선 통신 시스템에서 상향링크 송신 타이밍을 조절하는 방법 및 이를 위한 장치 |
US8750218B2 (en) | 2008-09-29 | 2014-06-10 | Blackberry Limited | Message processing in communication systems |
WO2014125906A1 (ja) * | 2013-02-18 | 2014-08-21 | 株式会社Nttドコモ | 基地局及び方法 |
WO2015002123A1 (ja) * | 2013-07-02 | 2015-01-08 | 株式会社Nttドコモ | ユーザ装置、通信システム、及びバックオフ制御方法 |
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Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL1952560T3 (pl) * | 2005-10-21 | 2014-05-30 | Ericsson Telefon Ab L M | Technika realizacji procedury swobodnego dostępu poprzez interfejs radiowy |
KR101486352B1 (ko) * | 2007-06-18 | 2015-01-26 | 엘지전자 주식회사 | 무선 통신 시스템의 단말에서의 상향링크 동기 상태 제어방법 |
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US20140161117A1 (en) * | 2011-07-26 | 2014-06-12 | Nokia Siemens Networks Oy | eNB Enforced TAT Expiry/TA Validity |
US20140079032A1 (en) * | 2011-10-07 | 2014-03-20 | Telefonaktiebolaget L M Ericsson (Publ) | Uplink Synchronization Method and User Equipment |
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US9572121B2 (en) * | 2012-08-17 | 2017-02-14 | Qualcomm Incorporated | Methods and apparatus for timing synchronization during a wireless uplink random access procedure |
US9210673B2 (en) * | 2012-09-06 | 2015-12-08 | Apple Inc. | Recovery from uplink timing alignment failures in cellular communications |
WO2014067135A1 (zh) * | 2012-11-02 | 2014-05-08 | 华为技术有限公司 | 控制上行信号的传输的方法及其装置 |
US9641303B2 (en) * | 2013-09-09 | 2017-05-02 | Huawei Technologies Co., Ltd. | System and method for increasing low density signature space |
US9350734B1 (en) | 2013-11-01 | 2016-05-24 | Sprint Spectrum L.P. | Method and system for managing a flood of data-connection requests |
EP3281460B1 (en) * | 2015-04-07 | 2020-01-29 | QUALCOMM Incorporated | Adjustment of timing advance values in mobile devices |
US10371313B2 (en) | 2016-02-17 | 2019-08-06 | The Boeing Company | Load relief tie rod |
CN109150439B (zh) * | 2017-06-16 | 2021-02-05 | 电信科学技术研究院 | 一种数据传输方法、装置、网络侧设备和用户设备 |
US10959268B2 (en) * | 2018-02-16 | 2021-03-23 | Qualcomm Incorporated | Random access timeline and timing adjustment techniques |
US20210250884A1 (en) * | 2018-06-20 | 2021-08-12 | Convida Wireless, Llc | Synchronization in multi-hop nr iab deployment |
WO2021035658A1 (en) * | 2019-08-30 | 2021-03-04 | Qualcomm Incorporated | Methods and apparatuses for timing advance in rach |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100375477C (zh) * | 2004-05-19 | 2008-03-12 | 中兴通讯股份有限公司 | 一种通信系统网元间数据传输时间的调整方法 |
CN1957545A (zh) * | 2004-05-28 | 2007-05-02 | 艾利森电话股份有限公司 | 自适应天线系统中的ta更新 |
PL1952560T3 (pl) | 2005-10-21 | 2014-05-30 | Ericsson Telefon Ab L M | Technika realizacji procedury swobodnego dostępu poprzez interfejs radiowy |
US20070293157A1 (en) * | 2006-06-20 | 2007-12-20 | Telefonaktiebolaget L M Ericsson (Publ) | Mobile Assisted Timing Alignment |
US8218526B2 (en) * | 2007-04-30 | 2012-07-10 | Texas Instruments Incorporated | Uplink synchronization maintenance principles in wireless networks |
HUE033683T2 (en) * | 2007-06-18 | 2017-12-28 | Lg Electronics Inc | Procedure for performing user device upload direction connection synchronization in a wireless communication system |
WO2009084998A1 (en) * | 2008-01-03 | 2009-07-09 | Telefonaktiebolaget Lm Ericsson (Publ) | Fast radio link recovery after handover failure |
US8908570B2 (en) * | 2008-02-01 | 2014-12-09 | BlackBerrry Limited | Control signal management system and method |
KR101468742B1 (ko) * | 2008-05-06 | 2014-12-04 | 엘지전자 주식회사 | 무선통신 시스템에서 데이터 전송 방법 |
-
2008
- 2008-06-02 WO PCT/JP2008/060151 patent/WO2009147709A1/ja active Application Filing
- 2008-06-02 KR KR1020127033351A patent/KR101240090B1/ko active IP Right Grant
- 2008-06-02 KR KR1020127033347A patent/KR101240033B1/ko active IP Right Grant
- 2008-06-02 EP EP12151699.1A patent/EP2445280B1/en active Active
- 2008-06-02 KR KR1020127033349A patent/KR101240094B1/ko active IP Right Grant
- 2008-06-02 EP EP12151700.7A patent/EP2445281B1/en active Active
- 2008-06-02 EP EP08777102.8A patent/EP2288223B1/en active Active
- 2008-06-02 JP JP2010515679A patent/JP5003820B2/ja active Active
- 2008-06-02 KR KR1020107027148A patent/KR101240004B1/ko active IP Right Grant
- 2008-06-02 KR KR1020117006620A patent/KR101171624B1/ko active IP Right Grant
- 2008-06-02 KR KR1020127033348A patent/KR101240138B1/ko active IP Right Grant
- 2008-06-02 CN CN200880129608.7A patent/CN102047737B/zh active Active
-
2010
- 2010-12-01 US US12/957,478 patent/US8787956B2/en active Active
-
2011
- 2011-04-04 US US13/079,265 patent/US8768392B2/en active Active
-
2013
- 2013-01-08 US US13/736,719 patent/US9191933B2/en active Active
- 2013-01-08 US US13/736,712 patent/US9037177B2/en active Active
- 2013-04-12 US US13/862,092 patent/US9055575B2/en active Active
Non-Patent Citations (4)
Title |
---|
"3GPP TSG RAN WG2 Meeting #62 R2-082221, 3GPP", 5 May 2008, article FUJITSU: "TA Timer Handling in Msg2", pages: 1 - 4, XP050139991 * |
"3GPP TSG-RAN WG2 Meeting #62 R2-082201, 3GPP", 5 May 2008, article NOKIA CORPORATION ET AL.: "Editorial Updates to 36.321", pages: 1 - 25, XP008137268 * |
"3GPP TSG-RAN WG2 Meeting #62 R2-082435, 3GPP", 5 May 2008, article NOKIA CORPORATION ET AL.: "On timing advance commands and synchronization status", pages: 1 - 3, XP050140123 * |
See also references of EP2288223A4 * |
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