CN110235457A - The system and method for cell range extension - Google Patents
The system and method for cell range extension Download PDFInfo
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- CN110235457A CN110235457A CN201780085138.8A CN201780085138A CN110235457A CN 110235457 A CN110235457 A CN 110235457A CN 201780085138 A CN201780085138 A CN 201780085138A CN 110235457 A CN110235457 A CN 110235457A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
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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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Abstract
The application discloses a kind of method for supporting the range expanding communication between wireless base station and the first wireless device.The wireless base station eNB receives the information from the first wireless device UE2.When the information indicates the distance between the wireless base station eNB and the wireless device UE2 or time delay.The wireless base station eNB judges whether first wireless device is located at except the first range 12 according to the information received.If it is judged that the wireless device is located at except first range 12, then the wireless base station eNB determines the first protection interval for being communicated with the wireless device UE2.First protection interval is longer than the second protection interval for being communicated with the wireless device UE1 in the first range 12.The instruction of first protection interval is sent to the first wireless device UE2 by the wireless base station eNB.
Description
Technical field
This application involves the coverage areas of wireless base station in spread radio communication system.
Background technique
Long term evolution (LTE) is a kind of wireless communication technique that developed by the 3rd generation partner program (3GPP).Mesh
Preceding LTE standard (being updated to the 13rd edition) supports that largest cell radius is about 107km, corresponds to the formulation from the 8th edition
Maximum coupling loss (MCL).Its original applications is extended to newest wireless communication field, such as machine type by LTE technology
Type communicates (MTC), Internet of Things (IoT) and air-to-ground communication.These technologies are likely to need to expand the coverage area.
Improvement project has made it possible that wireless user equipment (UE) works at higher MCL, therefore apart from base station
Or the ability to work at the farther range of access point is possibly realized.For example, even if be located at about 4 times of current largest cell radius away from
From the coverage enhancement UE with the ability for increasing MCL~15dB still is able to detect and be synchronized to LTE cell.
However, other aspects of current LTE standard can not allow UE to work in the cell for increasing size.
Example described below is not limited to solve the embodiment of any or whole defect of known system.
Summary of the invention
A method of supporting the range expanding communication between wireless base station and the first wireless device, comprising: in wireless base
It stands side:
The information from first wireless device is received, the information indicates that the wireless base station is wireless with described first
The distance between equipment or time delays；
According to the information received, judge whether first wireless device is located at except the first range；And
If it is confirmed that first wireless device is located at except first range, then:
The first protection interval communicated with first wireless device is determined, wherein first protection interval is longer than
The second protection interval communicated with the wireless device within the scope of being located at described first；And
The instruction of first protection interval is sent to first wireless device.
Optionally, first protection interval of determination includes the integer amount of the subframe of determining first protection interval.
Optionally, first protection interval is selected from multiple and different numerical value, and each value is the integer number of subframe
Amount.
Optionally, which comprises communicated using first protection interval with first wireless device；With
And communicated using second protection interval with the second wireless device, wherein second wireless device is located at first range
Within.
It optionally, include between the wireless base station and the wireless device from the received information of the first wireless device
Two-way time instruction.
Optionally, the instruction of the two-way time is received on uplink random access channel.
Optionally, the instruction of the two-way time indicates that the two-way time is the integer amount of subframe.
Optionally, the instruction of the two-way time is by being located at used leader sequence in the first range with wireless device
The different leader sequence of signal transmits.
Optionally, the instruction of the two-way time is ascending physical signal random access channel (Physical Random
Access Channel, PRACH) on connection request message in it is received.
It optionally, include indicating that first wireless device is located at described the from the received information of the first wireless device
Mark except one range.
Optionally, from the received information of the first wireless device include coarseness two-way time first instruction and
Than the second instruction of the two-way time of the first instruction fine granulation.
Optionally, the second instruction of the two-way time is received after Timing Advance has been sent to wireless device
's.
Optionally, it during connecting with first wireless device, repeats to determine described in the first protection interval and transmission
The update instruction of first protection interval is to first wireless device.
Optionally, first protection interval is used for time division duplex (Time Division Duplex, TDD) or half-duplex
Frequency division duplex (Half Duplex-Frequency Division Duplex, HD-FDD) operation, the method includes in downlink
First protection interval is used between link subframe and uplink subframe.
Optionally, the method also includes during downlink subframe n, sending scheduling instruction with scheduling uplink number
According to transmission；According to n and first protection interval, determine desired uplink subframe to receive data.
Optionally, the method also includes sending down link data during downlink subframe n；And according to n with
And first protection interval, desired uplink subframe is determined to receive hybrid automatic repeat-request confirmation (Hybrid
Automatic Repeat reQuest-Acknowledge, HARQ-ACK).
Optionally, first protection interval of determination includes: that calculating is as follows
Wherein,It is the integer amount of protection interval subframe；TGPIt is between the protection in the leading format of non scalable cell
Every length；It is from the received round trip delay time of wireless device.
Present invention also provides it is a kind of support the communication range between wireless base station and the first wireless device extend method,
It is characterised by comprising: in wireless device side:
Determine the measurement for indicating distance between the wireless device and the wireless base station；
According to measurement, the data for indicating the distance are determined；
The data are sent to the wireless base station；
Receive the instruction of the used protection interval when communicating with the wireless base station, wherein when the wireless device
When except the first range of the wireless base station, the protection interval has the first numerical value；When the wireless device is located at
When within the scope of described the first of the wireless base station, the protection interval has second value, and wherein second value is less than the
One numerical value.
Optionally, the data include the instruction of the two-way time between the wireless base station and the wireless device.
Optionally, the instruction of the two-way time is sent on uplink random access channel.
Optionally, the instruction of the two-way time indicates that the two-way time is the integer amount of subframe.
Optionally, there are multiple leader sequences corresponding from different subframe integer amounts, which comprises selection is simultaneously
It should be to be used for two-way time using leader sequence.
Optionally, the instruction of two-way time is the connection request message hair on ascending physical signal random access channel (PRACH)
It send.
Optionally, the method also includes whether judging first wireless device according to the data for indicating the distance
Except first range；And it sends and indicates whether first wireless device is located at the mark except first range
Know.
Optionally, from first wireless device send information include coarseness two-way time first instruction and
Than the second instruction of the two-way time of the first instruction fine granulation.
Optionally, the second instruction of the two-way time is calculate by the following formula:
Wherein,TRTTThe two-way time of=estimation；GRTT=to institute
State granularity known to wireless base station and the wireless device.
Optionally, the method also includes from the wireless base station receiving time lead；Update two-way time；And root
According to the two-way time of the update, the second instruction of two-way time is sent.
Optionally, the method also includes during connecting with the wireless base station, the update for receiving protection interval refers to
Show.
Optionally, the method also includes the integer amounts that the instruction information of the protection interval is subframe.
Optionally, the integer amount of subframe is calculated by following formula:
Wherein, nGPIt is the integer amount of subframe；TGPIt is the length of the protection interval in the leading format of non-Extended Cell；
TRTTIt is from the received round trip delay time of the wireless devices.
Optionally, first protection interval is operated for TDD or HD-FDD, which comprises in downlink
First protection interval is used between frame and uplink subframe.
Optionally, the method also includes during downlink subframe n, receiving scheduling instruction with scheduling uplink number
According to transmission；According to n and the protection interval, uplink subframe is determined to send the data.
Optionally, the method also includes receiving down link data during downlink subframe n；And according to n with
And the protection interval, uplink subframe is determined, to send hybrid automatic repeat-request confirmation (HARQ-ACK).
The application also proposes the wireless base station of a kind of achievable disclosure or present claims the method.
The application also proposes the wireless device of a kind of achievable disclosure or present claims the method.
At least one embodiment provided herein facilitates the user when UE is located at except the coverage area of network cell
The foundation and maintenance of link between equipment (UE) and LTE cell (eNodeB).UE reports the two-way time for describing the link
Measurement, to allow the reliable communication between UE and eNodeB.
At least one embodiment provided herein minimizes or avoids the additional work for increasing eNodeB processing signal
Make.At least one embodiment provided herein does not lose the spectrum efficiency of communication system.It is provided herein at least
Existing 3GPP standard that one embodiment is backward compatible.
Embodiment provided herein can be applied to the frequency division full duplex (FDD) of LTE, time division duplex (TDD) and half
Duplexing FDD situation.Embodiment provided herein can be applied to routine and/or extended cyclic prefix (Cyclic Prefix,
CP).Embodiment provided herein can be applied to coverage enhancement (Coverage Enhancement, CE) ability
UE, including but not limited to broadband are limited/coverage enhancement (Bandwidth Limited/Coverage Enhancement, BL/
CE), machine type communication (MTC), narrowband Internet of Things (NB-IoT) and UE support air-to-ground communication.
The framework of the version 13 of LTE is improved although embodiment focuses on, usually with newly eating dishes without rice or wine to consider under environment
LTE evolution, the application can be applied to other sychronous wireless communication systems.
The combination of software or hardware and software can be performed in functions described herein by hardware, processing equipment
Form is realized.Processing equipment may include computer, processor, state machine, logic array or other suitable processing equipments.It is described
Processing equipment can be general processor, can runs software make general processor execute needed for task.Alternatively, the place
Managing equipment can also be dedicated for realization required function.It is (soft that another aspect of the present invention is to provide a kind of machine readable instructions
Part), when executed by a processor, it can be achieved that approach described herein.The machine readable instructions can be stored in electronics
In storage device, hard disk, CD or the readable storage medium of other machines.The machine readable media can for it is machine readable forever
Long property medium.Term " machine readable non-volatile media " includes all machine readable Jie other than provisional transmitting signal
Matter.The machine readable instructions can be downloaded in storage medium by network connection.
The feature of example, embodiment and/or any example or embodiment can be combined in any form, unless feature
Between cannot be compatible with.
Detailed description of the invention
Embodiments herein by way of example, and is described in conjunction with attached drawing.
Fig. 1 illustrates the wireless communication system of the wireless base station for the UE being located at different range with service.
Fig. 2 illustrates uplink and downlink between wireless base station and UE.
Fig. 3 illustrates the method example of the operation in the network of Fig. 1.
Fig. 4 illustrates LTE random access procedure.
Fig. 5 illustrates the trial transmission received in window in PRACH.
Fig. 6 illustrates the table of data used in the example for supporting range enhancing.
Fig. 7 illustrates the leader sequence for transmitting metric.
Fig. 8 illustrates the message in the random access procedure with the first two-way time.
Fig. 9 is illustrated in the random access procedure of the second two-way time with the first two-way time being longer than in Fig. 8
Message.
Figure 10 illustrates the example of message used in random access procedure.
Figure 11 illustrates the message in random access procedure.
Figure 12 illustrates the embodiment of the scheduling under fdd mode.
Figure 13 illustrates the example of the modified frame type of architecture 2 of the protection subframe with different number.
Figure 14 to 17 illustrates the scheduling time data for modified frame type of architecture 2.
Figure 18 to 21 illustrates the time data of the operation of the HARQ-ACK with modified frame type of architecture 2.
Figure 22 schematically shows the exemplary device of wireless base station or wireless devices.
Specific embodiment
Embodiments herein is only described in an illustrative manner below.These example representations implementation best side of the invention
Formula, although it is not the sole mode for realizing the application, at present to known to applicant.These descriptions elaborate exemplary
The sequence of function and step is for constructing simultaneously operation example.But identical or equivalent function and operation process can be by
Different example is completed.
It should be noted that within the scope of the application, institute in following paragraphs, claims and/or explanation and attached drawing
Various aspects, embodiment, example and its alternative of description, especially its single feature independent or combined can be implemented.
I other words the feature of all embodiment and/or any embodiment can in a variety of manners and/or combination is combined, remove
It is not compatible between non-feature.
Fig. 1 schematically shows wireless base station 10 (for example, wireless base station, wireless access point, eNobeB, eNB) and wireless
Wireless communication system between equipment UE1 and UE2.Wireless device is also referred to as user equipment (UE) or terminal.Wireless base station 10 is fixed
Coverage area or cell of the justice with the first radius 12.First radius is referred to as configured cell radius, is equivalent to LTE mark
Largest cell radius as defined in standard, such as 107km.Wireless device UE1 shown in figure is located within configured cell radius 12.
Wireless base station 10 can also be used for service be located at region 16 in wireless device, the region be located at except first community radius 12 and
Within second community radius 14.Second radius 14 can be largest cell radius.In this example, the second radius can correspond to
The radius of society of 50% (150km) of one radius of society (100km), 200% (300km) or 350% (450km).It is understood that
, other numerical value are also possible.Wireless device UE2 shown in figure is located in region 16.
In the example of the application, wireless base station 10 can be the wireless device clothes within first community radius 12
Business, such as UE1, or the wireless device in the region 16 between first community radius 12 and second community radius 14 takes
Business, such as UE2.Using messaging parameter relevant to first community radius, wireless base station 10 continues as being located at first community radius
Wireless device UE1 service within 12.For example, in TDD or HD-FDD system, between protection of the UE1 using the cell of radius 12
Every being communicated.Using messaging parameter relevant to second community radius 14, wireless base station 10 is wireless in region 16
Equipment UE2 service.For example, UE2 is led to using the longer protection interval of radius of society 14 in TDD or HD-FDD system
Letter.This allows traditional equipment that will be serviced, and without changing its operation, also can preferably utilize frequency spectrum resource.Although originally showing
Example shows only two UE, it is understood that, eNB can be serviced for more UE.
Fig. 2 illustrates the wireless device UE serviced by wireless base station 10.Wireless communication includes from wireless base station 10 to UE's
Downlink transmission and from UE to wireless base station 10 uplink transmission.There is the signal transmitted on downlink transmission to prolong
When delayDL, the signal transmitted in uplink has transmission delay delayUL.Total two-way time RTT=delayDL+
delayUL。
LTE supports time division duplex (Time Division Duplex, TDD) and frequency division duplex (Frequency
Division Duplex, FDD).LTE also supports half-duplex frequency division duplex (HD-FDD).In HD-FDD, equipment is at first
Between received on DL frequency band in section, then sent on UL frequency band in second time period.The equipment cannot carry out simultaneously
It sends and receives.In this respect, HD-FDD is similar with TDD.HD-FDD is suitable for the UE of low complex degree.
Above-described transmission delay has an impact to the operation under tdd mode and fdd mode.It is grasped with tdd mode
The wireless device of work cannot send and receive simultaneously.After the equipment has to wait for until receiving downlink subframe, ability
Enough send uplink subframe.LTE provides the protection interval between downlink subframe and uplink subframe, to allow to transmit
Delay.The protection interval is provided as special subframe (special defined in the table 2 in Section 4.2 of TS36.211
Subframe a part).LTE for different community size be provided with different number special subframe configuration (0,1,2,
...8).The length of special subframe is always a subframe.Under normal conditions, all UE in cell are in same special subframe
It is operated under configuration.For example, all UE use special subframe to configure 0 in the cell size 107km that maximum is supported,
Wherein protection interval is 10 OFDM characters.
Protection interval specified in TS36.211 is not suitable for the tdd mode at the distance that support is more than 107km.The application
Example in, wireless device except first community radius 12 uses longer protection interval.Protection interval is in length
It can be integer subframe, for example, 1,2 or 3 subframe.It is wireless that longer protection interval allows downlink subframe to reach
Equipment, and wireless device is allowed to send uplink subframe, on this transmitted by wired link subframe and other closer equipment
Synchronizing sub-frame reaches base station.Equipment utilization Timing Advance sends uplink subframe to realize simultaneously operating.
The wireless device operated with fdd mode can be received and transmitted simultaneously.However, wireless device is by one
A little time restrictions.The equipment that scheduling authorization is received during downlink subframe n should send uplink during subframe n+4
Subframe.Similarly, the equipment that down link data is received during downlink subframe n should be in the uplink subframe n+4 phase
Between send hybrid automatic repeat-request confirmation, i.e. HARQ-ACK.This means that the equipment has about three subframes (3ms) to prepare
Response.In bigger cell, two-way time RTT shortens this pot life.So distance eNB remoter equipment needs
Longer interval, for each of these processing.
This method is utilized from the received information of wireless device.The information indicate between wireless base station and wireless device away from
From.This allows wireless base station to select the protection interval for being suitble to each wireless device.For example, the eNB in Fig. 1 can select for UE1
GPF (General Protection False interval, and it is UE2 selection extended protection interval.
Fig. 3 illustrates the example of the method by wireless device (UE) and wireless base station (eNB) execution.In a step 101, UE
Determine the distance between UE and eNB and transmission delay.Different technologies are possible.In one example, UE can be measured from eNB
The signal received.By understanding the transmission power of signal and receiving power, UE can determine the path loss of the signal.Path
Loss is related with distance and transmission delay.By the data using storage, such as the inquiry table being stored in UE, or from
The data obtained at eNB or other data sources, UE can obtain distance from path loss.Determine the other technologies of distance/delay
When to reach observed time difference method (Observed Time Difference of Arrival, OTDOA), reaching uplink
Differences method (Uplink Time Difference of Arrive, UTDOA) and enhancing cell ID (Enhanced Cell-
ID, ECID).Another technology is the information using the GPS receiver from such as GPS.UE determines UE and base
The distance between stand.Identified distance can be converted into delay, such as two-way time (RTT) or one way delay (eNB-UE
Or UE-eNB)." two-way time " and " round trip delay time (RTD) " refers to identical numerical value.Two-way time RTT's initially estimates
Evaluation is calculated as:
TRTT,init=2d/c
Wherein, d be distance (such as eNB to UE), c be the light velocity.
RTT is numerical value very useful for UE and eNB.The numerical value represents UE when communicating with eNB for experience
Time delays.RTT can be used for selecting negative time offset, to attempt for sending random access to eNB.UE can send RTT
Measurement, or more commonly for, can send instruction distance information (step 102).
Therefore eNB needs to learn delay/distance as early as possible.The first stage communicated with eNB is random access (Random
Access, RA) process.Delay/distance can be transmitted to eNB during RA.It is explained below some feasible to transmit this
The technology of value.Delay/distance can be converted into the measurement with coarseness.Easy granularity is 1ms (=1 subframe).UE
RTT can be transmitted as sub-frame number nGP.This advantage is to reduce the data volume for needing to transmit, and allow delay/distance
Instruction send as early as possible.Transmitting delay/distance alternative solution is simply to transmit UE to be located at first community radius (i.e.
First community radius 12 in Fig. 1) except.This method needs individual data bit few as far as possible (for example, being arranged to " 1 "
Mark represents UE and is located at except first community radius).
During RA, UE is attempted in ascending physical signal random access channel (Physical Random Access
Channel, PRACH) on send signal, eNB is reached in the time window of such signal on prach.Optionally, the communication system
The PRACH window of identical maximum length as defined in the version 13 with LTE can be used in system.This advantage does not need additional
Frequency spectrum resource come support be located at radius of society except UE.UE, which can be used, utilizes process as described above RTT's calculated
Initial value carrys out the transmission of timing uplink, so that it is reached in PRACH detection window.UE may need to have different RTT values
Multiple trial.
In step 103, according to during uplink physical random access channel (PRACH) window from the received letter of UE
Number, RA process determines the Timing Advance TA for being used for UE.The TA is the UE using with the time migration synchronous with other UE, therefore
From UE uplink transmission can with the uplink of other UE transmit synchronize reach.At step 104, which is sent out
It send to the UE.In conjunction with its any RTT (i.e. sub-frame number, n calculated in a step 101GP), which starts using TA.ENB to
The UE sends measurement request.
In step 105, UE updates the initial estimate T of RTTRTT,init(calculated in a step 101),
It is successful for reaching in PRACH window:
TRTT=TRTT,init+TA
Wherein, TRTT,initIt is used by UE to be successfully transmitted the RTT initial estimate of Msg1；TRTTIt is by utilizing reception
The fine adjustment value of the RTT of the TA value arrived.
UE determines another indicator of delay/distance, such as RTT.This indicator representing in step 101 than being calculated
The finer granularity of measurement delay/distance.The indicator is sent to eNB (step 106).In step 107, using certainly
The information that UE is received, eNB determine the protection sub-frame number for supporting UE
Wherein, TGPIt is the length of protection interval in the leading format of non-Extended Cell.If two-way time is less than TGP, then
UE is located in the normal ranges of eNB (12) i.e. shown in FIG. 1, and capable of working normally.If two-way time is greater than TGP, then UE
It needs with additional protection interval come work.The equation, which is defined, is greater than T for two-way timeGPThe function that rounds up
(ceiling function).For example, the RTT of 1.2ms is rounded as 2ms (=2 subframe)；The RTT of 2.2ms is rounded as 3ms
(=3 subframe), etc..
In step 108, sub-frame number will be protectedIt is sent to UE.In step 109, UE is receivedValue.UE exists
With start to use during base station communicationValue.Value can be used during following one or more: in downlink chain
Protection interval sub-frame number between road and uplink subframe；Determine the uplink subframe for sending data；It determines and sends really
Recognize the uplink subframe of (for example, HARQ-ACK).
Since the distance between UE and eNB/delay change, eNB will be updated TA to guarantee continued synchronization.In step 110,
ENB calculates updated TA value.ENB judgement protection sub-frame numberWhether need to change.By new TA value and updatedValue (if necessary) be sent to UE (step 112).ENB and UE understands needed for connection procedureValue.
In step 113, UE use updated TA andValue.
In view of the UE on the aircraft of distance eNB about 300km.Initially,Then, UE will distance eNB it is enough
Closely, to needChange.When UE is moved within " routine " radius of society (i.e. 12 in Fig. 1), base station can
ConfigurationOnce UE is by simultaneously far from eNB, increasingThe reverse process of value can carry out, whereinFrom 0 → 1 →
2 are changed.By the instruction in broadcast system information (System Information, SI), eNB can notify its branch of each UE
Hold range extension.
Some other details are described below.
Random access (RA) process
Fig. 4 and Fig. 5 illustrates random access (RA) process that connection is established between UE and eNB.
Msg1: UE selects one in 64 available PRACH leader sequences, and in predefined uplink PRACH
It is sent to during one of frame.The sequence has the specific length as defined in leading configuration (as top level control).Based on warp
The downlink transmission time tested, UE send the sequence, it is therefore an objective to which base station side detects it during PRACH subframe.In fact,
This signal will be received after base station is in a delay, which is equal to RTT.In PRACH subframe, the eNodeB is open
PRACH detection of preamble window, wherein it attempts to detect all 64 sequences by related mechanism.The length of detection window is not only
Suitable for the length of leader sequence, and it is suitable for the configured maximum RTT of network.So the total length of PRACH detection window
For Tw=TCP+TSEQ+TGT, wherein TGTIt is protection interval corresponding with the maximum round trip time.UE positioned at cell edge will be through
The maximum round trip time is gone through, and their leader sequence is up to the least significant end of eNodeB detection window.Each leading format
Corresponding to different GT length, therefore, corresponding to different cell sizes.The smallest cell size is~14km (leading format
0), maximum cell size is~107km (leading format 3).More details can refer to Section 5.7 of 3GPPTS36.211.UE
It calculates random access radio network temporary identifier (RA-RNTI).If UE has sent PRACH, received but without from network
It is then sent again to any response then UE will increase its power (or the number of repetition for increasing PRACH) with solid pacing value
PRACH is leading.
Msg2: eNodeB is sent out on downlink sharied signal channel (Downlink Shared Channel, DL-SCH) to UE
Send send (addressed) RA-RNTI (Random Access Radio Network Temporary Identity) with
Machine access response, wherein RA-RNTI is calculated from the leading time slot sent.The message carries following information:
Temporary Cell Radio Network temporary identifier (C-RNTI)；
Timing Advance (TA) value: eNodeB is also notified that UE changes its timing, can compensate for the UE due to UE and eNB
The distance between caused by two-way time；
Uplink grant resource: initial resource allocation to UE is made the UE be able to use uplink total by network (eNodeB)
Enjoy channel (UL-SCH).TA is the RTT corrected value that UE will be applied to uplink transmission timing.This is because uplink is each
Be between UE it is synchronous, i.e. eNodeB require all UE time unifyings (time align) they uplink transmission.
Msg3: utilize UL-SCH, UE to send RRC connection request message to eNodeB.
Msg4: eNodeB is successfully received with contention resolved (contention resolution) message back message
UE。
After Msg4, data communication can be carried out effectively.UE can be scanned for any uplink or downlink
The Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) of DCI, and send or connect respectively
Receive data packet.
If UE sends coarseness RTT measurement in Msg1, then eNB will send Msg2 and Msg4 comprising the UE is slightly
The instruction of sub-frame number needed for responding these signals afterwards.The eNB can modify scheduling using the RTT value that UE is reported earliest.
Response of the eNB scheduling scheduling to Msg2 and Msg4, allows to be suitble to the sub-frame number so that UE has enough time to reply.
The UE other than radius (12 in Fig. 1) is configured positioned at cell to need to send leading improved method using a kind of.This
It is because leading and leading format is applicable in the up to cell of 107km.The UE can be according to calculated true in the step 101 of Fig. 3
Fixed distance/delay, with the time that determination is leading.Specifically applicable method is in the European patent application No. is 16306567.5
It has a detailed description.Assuming that the UE can be successfully transmitted detectable Msg1, and UE can be properly received Msg2.
Once detecting Msg2, the value of UE acquisition time lead (TA) from eNodeB corresponds to its RTT estimated value
Fine adjustment value:
TRTT=TRTT,init+TA
Wherein, TRTT,initIt is the Initial R TT estimated value that UE is used to be successfully transmitted Msg1；TRTTIt is to utilize received TA value
The fine adjustment value of RTT.
The UE determine accuracy is ± 16TSRTT, correspond to the granularity of Msg2TA value, wherein TS=1/30720000
Second.
Thick two-way time measurement
The measurement is the initial registration (attachment) for UE, and the object is to indicate extension RTT to eNodeB
Rough estimate evaluation.Since LTE operation is based on the subframe of 1ms duration, so a kind of easy granularity of thick RTT measurement is
Integer subframe.This reduces the data volumes for transmitting the value.The measurement is also designated as " sub-frame number ", nGP, and by following
Formula is calculated:
Wherein, TRTTIt is the two-way time estimated at UE, 0≤nGP≤NGP, also,
Wherein, TRTT,maxIt is cell range extension function by the maximum round trip time of support.
TRTT,maxAnd NGPIt is preset value known to UE and eNB.Fig. 6 illustrates nGPAnd NGPValue and eNB maximum
The table of coverage area.For example, working as NGPWhen=2, nGPValue can be 0,1,2, and maximum coverage range be 300km.
Instruction of thick two-way time in registration process
Thick two-way time in 1.Msg1
Measure nGPIt can be indicated to eNodeB as early as possible, i.e., in Msg1.During RA, eNodeB attempts 64 kinds of detection
Leader sequence.In order to indicate nGP, some additional leader sequences can be defined, the preamble sequence set that size is s can be formed,
In the corresponding specific n of each leader sequenceGPValue.Wherein the size s integrated is lower than 64 value, such as 4 or 8 as the order of magnitude.
Support the eNodeB of cell range extension that can extract n from itGPSequence start extraly to scan these sequences.Fig. 7 exhibition
The leader sequence suitable for the cell that maximum magnitude is 450km is shown.The length of RTT can be 0,1,2 or 3 subframe.It is leading
Sequence sets 64 ..., and 64+s } transmit the RTT that (signal) length is 1 subframe.Preamble sequence set 65+s ..., 65+2s }
Transmit the RTT that length is 2 subframes.Preamble sequence set 66+2s ..., and 66+3s } transmit the RTT that length is 3 subframes.At this
In embodiment, NGP=3.
The advantage of this method is to indicate n as early as possibleGP.However, this has aggravated the complexity of the side eNobeB, because additionally scanning volume
Outer leader sequence, and UE is needed to implement the new preamble sequence set.
Two-way time coarse value in 2.Msg3
UE can send n during Msg3 or RAGP.When successfully being detected random access response (Random in subframe n
Access Response, RAR) when, which will be in subframe n+k1Middle transmission Msg3, wherein k1≥6。
The scene of worst condition is that the UE only has the time budget of 5ms with the combination for RTT and the preparation of Msg3.
Usually, the UE DL receive terminate and UL transmission start between have the time budget of 3ms, in order to receive DL data packet simultaneously
Prepare UL data packet.In this way, the time for leaving RTT for is 5-3=2ms.The time is corresponding with maximum coverage range 300km.It needs
It should be noted that once receiving Msg2, which no longer monitors downlink, so the UE can be by whole k1A subframe is used
Prepare in RTT+Msg2 reception+Msg3.Therefore, for the RTT of 2ms, current LTE standard is had no need to change.This feelings
The description of condition is detailed in Fig. 8.
If largest cell range is set as 450km, maximum RTT is 3ms.Assuming that k1=6 under worst condition, then
The time that Msg2 is received and Msg3 prepares is only 6-3=3ms.The description of this case is detailed in Fig. 9.The time budget is for some
It may be challenge for UE.In this case, eNodeB will not receive Msg3 in subframe n+k1, and RA process understands self
It repeats, causes to generate uplink channel interference to other UE.It is possible to there is following two scheme:
(i) identical PRACH subframe may be selected for Msg1 transmission in the UE, and selects identical RA leading identical to obtain
RA-RNTI to retransmit Msg1.This is because what RA-RNTI was defined dependent on the 5.1.4 chapters and sections of 3GPP TS36.211
Special leading transmission subframe.In this way, it may be that the same UE is reattempting to registration (attach) that the eNodeB, which will be learnt,.
It supports the eNodeB of range extension feature to can store RA-RNTI, be successfully transmitted Msg1 but replied from Msg3 is not had to, and guarantee
The Msg3 for returning to RA-RNTI is called, wherein k1≥7.This scheme eNodeB scheduler increases some complexities, but potential
Ground makes a concentrated effort to finish RA process.
(ii) UE carries out conventional RA process, until eNobeB selects k1≥7.This scheme does not need any additional multiple
Miscellaneous degree, it is possible that will increase the time for completing RA process.
As shown in Figure 10, according to the regulation of the 6.2.2 chapters and sections of 3GPPTS36.331, nGPValue can be located at Msg3 and RRC
In connection request (RRCConnectionRequest, RRC-CR) message.It is noted that in the present embodiment, protection interval
The maximum quantity of frame is NGP=2, therefore, nGPRange be { 0,1,2 }.Accordingly is defined as:
RRCConnectionRequest field description
numberOfGP-Subframes
It provides the experienced two-way time in multiple subframes.When scheduling uplink resources are to the UE, eNB is by the phase
Prestige allows using at least numberOfGP-Subframe subframe as protection interval.
Figure 11 illustrates a kind of RA process typical as RTT=2, between corresponding eNobeB and UE
The relative time and other information of line link and downlink.
3. being fed back in registration process without rough two-way time
In this optinal plan, nGPIt is not transmitted at initial registration (attachment).On the contrary, the UE wait until
Initial registration is completed, and directly transmits fine RTT (as described above).In order to accomplish this point, in eNodeB in uplink
In the case where dispatching any PUSCH transmission (for example, Msg3) in subframe, wherein the UE can not be met due to increased RTT
Time requirement, then the UE may have to attempt repeatedly to register.Before fine RRT is indicated to eNodeB, which can be with
It repeatedly attempts to re-register.
4. shorter rough two-way time measures
It is not to transmit nGP, which can be sent to eNodeB for shorter information, only to notify that it is normal that the eNodeB UE is located at
It advises except radius of society.The UE can send individual bit " range extension " mark, eNB can in the initial stage of registration,
It is assumed that maximum support extends RTT, until the UE can communicate finer RTT estimated value.
Fine measurement of round trip time
This measurement representation is after the initial registration of UE, to the finer RTT estimated value of eNodeB.In UE initial registration
Afterwards, this measurement can be indicated to together with the other parameters of eNodeB after initial registration with UE and send.More due to these message
Long, finer RTT may be sent, i.e., granularity more finer than 1ms.If GRTTIt is known selected to UE and eNodeB
RTT granularity, then finer two-way time measureIs defined as:
Suitable particle size range can be several hundred microseconds, for example, GRTT=100 μ s.
The finer RTT estimated value is sent to eNodeB, in order to provide be better than 1ms RTT accuracy.In LTE
In, fine RRT value is a part for the measurement report that UE is supplied to eNodeB.After being acquired at eNodeB, lead to
It can often be estimated and pass through DCI and be indicated to the TA value of UE to be updated according to eNodeB.As follows by deriving, present eNodeB can be with
Sub-frame number of the local estimation as protection interval:
Wherein, TGPIt is the length of protection interval in the leading format of non-Extended Cell.The equation is defined greater than TGP's
The function that rounds up of two-way time.For example, the RTT of 1.2ms rounds up as 2ms (=2 subframes), the RTT of 2.2ms is upward
Being rounded is 3ms (=3 subframes), and so on.
Then,Value will be transmitted as the Connecting quantity before data exchange between after initial registration and both ends to UE.
For example,It can be RRC configuration parameter.
Due to the mobility (for example, air-to-ground communication) of UE, RTT is expected to change during connection.Work as RTT
Cause with it is configuredDifferentWhen, eNodeB will be reconfigured by dedicated signalingThis is enough, becauseRate of change it is very low (at least dozens of minutes), and reconfiguring not is that delay is crucial.For example,Increasing adds deduct
Few 1, which must move about 150km.For the aircraft that movement speed is 1200km/h, this needs 7.5 minutes.
It can be with the Downlink Control Information of uplink and/or downlink packet for each scheduling
The information carried in (Downlink Control Information, DCI) transmits together.Dedicated letter can be avoided the need in this way
It enables, and avoid the need for avoiding reconfigures.
It is notDCI can optionally indicate k, i.e. in subframe n DCI receive with n+k subframe in DL data packet receive or
The delay in subframe between the transmission of UL data packet.In this case, the eNodeB is when deriving k, it is necessary to consider
Range extension is used as coverage enhancement parameter
Range extension may be only for the UE that range can be used to enhance.In addition to the 4.3.29 of 3GPP TS36.306
Defined in chapters and sections, these UE will use new range to enhance parameter to indicate to support range extension.For example, about existing CE
The UE of ModeA and ModeB can introduce following field in version 14:
rangeExtension-CE-ModeA-r14
This field define when UE works under CE ModeA mode, if supports range extension.If ce-ModeA-
R14 can be supported, then it is essential for the UE under the version.
rangeExtension-CE-ModeB-r14
This field define when UE works under CE ModeB mode, if supports range extension.If ce-ModeA-
R14 can be supported, then it is essential for the UE under the version.
The UL-SCH scheduling of cell range extension
The description of this part must needed for Uplink Shared Channel (Uplink Shared Channel, UL-SCH) scheduling
It operates, wherein it is assumed that from the configured of eNodeBValue.ENodeB and UE needs to considerValue.In dispatching uplink
When link authorization (passing through the relevant DCI of UL), eNodeB is utilizedUE is utilizedDetermine when to send corresponding UL-SCH.
(i) the UL-SCH scheduling in frame structure Class1 (FDD)
Typically, for frame structure Class1, when eNodeB has sent uplink grant in subframe n, according to
8.0 parts of 3GPP TS36.213 provide that UE needs transmit corresponding uplink data packet in n+4 subframe, so that 4
Subframe is received for DCI and UL-SCH prepares and transmits.For being able to carry out for the UE of cell range extension, new UL-
SCH transmission time isWhereinFor the final configuration quantity of protection interval subframe.Figure 12 illustrates the above behaviour
Make.In step 201, UE is storedValue.In step 202, which has received scheduling authorization in subframe n.In step
In rapid 203, which prepares data to send on uplink.In step 204, the UE is in subframePeriod exists
Data are sent in uplink.About FDD, the term " quantity of protection interval subframe" mean and receive scheduling authorization on DL
And the additional sub-frame number waited between data is sent on UL.
(ii) the UL-SCH scheduling in frame structure type 2 (TDD, HD-FDD)
Generally, for the UE for being able to carry out cell range extension, table 4.2.2 in 3GPP TS 36.211 can be by
Figure 13 is replaced.If subframe n is not indicated as the uplink subframe (U) in Figure 13, eNodeB is not allowed to dispatch
In subframe n uplink transmission, with for UL/DL configuration andCombination.
For frame structure type 2 (TDD), provided according to 8.0 parts of 3GPP TS36.211 agreement, when
ENodeB has sent uplink grant in subframe n, then UE just needs to be sent in subframe n+k, wherein k is by UL/
Depending on DL configuration.
For being able to carry out for the UE of cell range extension, the value of k is defined to for each UL/DL configuration and eachWherein,For the final configuration quantity of protection interval subframe.This is because which special subframe the UE indicates or has
Possible UL subframe can be used as additional protection interval.This is required, because the UE needs to monitor DL, and is required to full
Sufficient simultaneous uplink transmission.So it need byThe additional two-way time indicated.
These tables are established there are five requiring, there is defined subframe k, wherein received uplink grant in subframe n
It needs to send in subframe n+k, as follows:
1. UL-SCH will occur at least after receiving uplink grantA subframe.
2.UL-SCH cannot betide UE as in the subframe of protection interval.
3. the uplink grant of identical UL/DL configuration cannot be directed toward the subframe for UL-SCH transmission.
4.UL-SCH transmission cannot occur during special subframe, and therefore, uplink grant cannot be directed toward special subframe.
5. uplink grant should be directed toward the first available subframe not clashed with above-mentioned requirements for UL-SCH.
The UE of non-range extension continues to use special subframe between DL and UL.It is special that this can be used in the UE of range extension
Subframe is as protection subframe.
Figure 14 to 17 illustrate be respectively provide for UL/DL configuration 0-6 andThe table of k value when with 3.
In these tables, (D) represents DL subframe, and (S) represents special subframe, and (U) represents UL subframe, and (SG) represents special as GP
Subframe, (ULG) represent the UL subframe for being used as GP.
It is noted that TDDUL/DL configuration andSome combinations even do not allow single UL subframe, so UL transmit
It is impossible (in table, being marked with " X ").Therefore, according to Figure 16 or 17, if a UE detects a cell, and
UL/DL configuration at the UE with estimatedDo not allow the single UL subframe of every frame, then:
Option 1, which will not attempt is registered in the cell.
Option 2, which will attempt to register in the cell, and send nGP(or instruction of spreading range).Pass through reception
nGP, eNodeB also can know that the missing of useful uplink subframe, and can refuse the UE or configure its TDD UL/DL
The configuration of UL transmission can be sent by being reconfigured as the UE.This may be determined by the service request in Msg3, for example, if UE is sent out
EstablishmentCause::=emergency has been sent, has allowed the UE to send urgency signal then eNodeB will be switched to
UL/DL configuration.For other services in Msg3, for example, EstablishmentCause::=mo-Data, eNodeB will lead to
It crosses RRCConnectionReestablishmentReject and refuses the UE, be detailed in the 6.2.2 section of 3GPP TS36.331.This
Kind eNodeB behavior can be a part of LTE specification, can also open and implement to eNodeB.
UE with cell range extension is reported
The UE process for reporting CSI with cell range extension
1. with being reported using the aperiodic CSI of PUSCH for cell range extension
It is aperiodic that report CSI executed in PUSCH.Therefore, such to report the shadow that extended by range
It rings.
2. with being reported using the period CSI of PUCCH for cell range extension
The period that eNodeB will be reported according to following option configuration period CSI:
(i) consideration finally configuresUse available uplink subframe for PUCCH periodic report.NewIn the case of value, eNodeB is needed reconfigure to adjust periodic report to newValue.
(ii) consider most probableValue uses available uplink subframe periodically to report for PUCCH.In this way,
It is new when being calculatedValue when, do not need to reconfigure yet.However, this scheme limits the number of sub frames that PUCCH is reported
Amount.
Or, it is assumed that it only reports the subset in subframe to be affected, i.e., reports UL subframe there are still some, which can be with
The conflicting any periodic report of UL subframe cast out and be used as protection interval.
The UE process of HARQ-ACK is reported under cell range extension
HARQ-ACK in frame structure 1 is reported
Hybrid automatic repeat-request (Hybrid Automation Repeat Request, HARQ) is that a kind of UE confirms it
Whether the mechanism of data is had correctly received on the uplink.Generally, for frame structure Class1, according to 3GPP TS
36.213 Section of 7.3 regulation, when eNodeB has sent DL DCI in subframe n-4, then UE needs transmit phase in subframe n
The ACK/NACK value answered, so that 4 subframes are received for DCI and HARQ-ACK prepares and transmits.
For being able to carry out the UE of cell range extension, if corresponding DL DCI is in subframe n-4-In be received,
So HARQ-ACK will be transmitted in subframe n.
HARQ-ACK in frame structure 2 is reported
Frame structure type 2 is bundled using HARQ-ACK, i.e., if all data packets are successfully, to send a representative
Property ACK value, be used for a bundle of downlink packet, or if at least one data packet in the bundle be it is unsuccessful,
Then send NACK.The bundle size of each uplink subframe and since received DL package number is as shown in figure 18.For example,
For TDD UL/DL configuration #1 and subframe n=2, which is two data packets for early stage receiving 6 and 7 subframes
Combination.
In the case where range extension, the uplink subframe as protection interval cannot be used for HARQ-ACK instruction.Institute
With the binding is needed according to configurationValue is redesigned.Figure 18-21, which is respectively shown, to be worked asWhen k
Value, wherein k is the delay received between PDSCH data packet and transmission HARQ-ACK (as unit of subframe).K can be directed toward DL or
Person's special subframe.The index k for belonging to same HARQ-ACK subframe forms HARQ-ACK bundle K:{ k0, k1, kM-1, wherein M is the bundle
Length.
Figure 22 illustrates device and/or UE positioned at wireless base station (for example, base station) side, may be implemented as any shape
The calculating equipment and/or electronic equipment of formula, and the systems and methods embodiment can be carried out wherein.Processing unit
300 include one or more processors 301, can be microprocessor, controller or be able to carry out instruction to control equipment
The processor of other any appropriate types of operation.Processor 301 and the other component of the equipment pass through one or more buses
306 are connected.Using any computer-readable media, such as memory 302, it can provide processor executable instruction 303.Processing
The executable instruction 303 of device may include the instruction for realizing above method function.The memory 302 can be any adaptive type
Memory, such as read-only memory (Read-only Memory, ROM), random access memory (Random Access
Memory, RAM) and any type of storage device, such as magnetical or optical storage device.Data used in processor
304 can be stored in memory 302.Data 304 include above-described timing data.Processing unit 300 includes wireless
Transceiver 308.
Above embodiments are merely exemplary.Disclosure herein is not by each step described in as shown in the figure and literary
The limitation of specific combination, but any appropriate subset or combination of each step including being executed with any appropriate sequence, or choose
The operation of part steps.Part in the method can carry out simultaneously.
Herein cited term " user equipment " (UE) refers to any equipment with processing and electronic communication capability,
Make it possible to the method and function executed according to embodiment as described herein.Those skilled in that art need, it is realized that should
Processing and electronic communication capability can be integrated into many different equipment, therefore term " user equipment " includes mobile electricity
Words, personal digital assistant, PC and numerous other equipment.
Although the application focuses on the LTE standard that building reaches version 13, identical concept can be used for it
His or future the communication system (- NR for example, 3GPP newly eats dishes without rice or wine).
It will be apparent to those skilled in the art that in the case where not losing explored effect, this paper institute
Any range or device value provided can be expanded or be changed.
In the case where not losing explored effect, those skilled in the art can use example with logical in any electronics
It carries out using such as 2G, 3G, 4G, 5G or any other electronic communication standard in communication network.
It is understood that above-mentioned beneficial effect and advantage can be related to one embodiment, or it is related to several implementations
Example.Embodiment is not limited to solve the problems, such as any or all of illustrated these, or has any or all of illustrated
Beneficial effect and advantage these.
One or more of these projects are referred to the reference of ' one ' project.Used herein ' include ' meaning
Including the method and step or element that are identified, but these steps and element do not include exclusive list, and a method and
Device may include additional step and element.
The step of method described herein, can execute in any suitable order, or hold simultaneously in appropriate circumstances
Row.In addition, single step can be deleted from any method, without departing from the spirit and scope of subject matter described herein.It is above-mentioned
Any exemplary various aspects can be combined with any other exemplary aspect of the description with formed further show
Example, without losing desired effect.
It is understood that the foregoing description of preferred embodiment is only presented in an illustrative manner, those skilled in the art
Various modifications can be made.Although with certain specifics, or with one or more single embodiments, it has been described that various realities
Example is applied, but those skilled in the art can carry out many change without departing from the scope of the present invention to the disclosed embodiments.
Claims (37)
1. a kind of method for supporting the range expanding communication between wireless base station and the first wireless device, comprising: in wireless base station
Side:
The information from first wireless device is received, the information indicates the wireless base station and first wireless device
The distance between or time delays；
According to the information received, judge whether first wireless device is located at except the first range；And
If it is confirmed that first wireless device is located at except first range, then:
The first protection interval communicated with first wireless device is determined, wherein first protection interval is longer than and position
The second protection interval that wireless device within the scope of described first is communicated；And
The instruction of first protection interval is sent to first wireless device.
2. the method according to claim 1, wherein the first protection interval of the determination includes:
Determine the integer amount of the subframe of first protection interval.
3. according to the method described in claim 2, it is characterized in that, first protection interval is selected from multiple and different numerical value
Out, each value is the integer amount of subframe.
4. according to method described in any of the above claim characterized by comprising
It is communicated using first protection interval with first wireless device；And
It is communicated using second protection interval with the second wireless device, wherein second wireless device is located at first model
Within enclosing.
5. according to method described in any of the above claim, which is characterized in that from the received information of the first wireless device
Instruction including the two-way time between the wireless base station and the wireless device.
6. according to the method described in claim 5, it is characterized in that, the instruction of the two-way time is to access to believe in uplink random
It is received on road.
7. method according to claim 5 or 6, which is characterized in that when the instruction instruction of the two-way time is described round-trip
Between be subframe integer amount.
8. according to the described in any item methods of claim 5 to 7, which is characterized in that the instruction of the two-way time be by with nothing
Line equipment is located at what the leader sequence that used leader sequence signal is different in the first range transmitted.
9. method according to claim 7 or 8, which is characterized in that the instruction of the two-way time is that ascending physical signal is random
It accesses received in the connection request message on channel (Physical Random Access Channel, PRACH).
10. method according to claim 1-4, which is characterized in that from the received letter of the first wireless device
Breath includes indicating that first wireless device is located at the mark except first range.
11. according to method described in any of the above claim, which is characterized in that from the received information of the first wireless device
The first instruction of two-way time including coarseness and the second instruction of the two-way time than the first instruction fine granulation.
12. according to the method for claim 11, which is characterized in that the second instruction of the two-way time is in time advance
It measures received after having been sent to wireless device.
13. according to method described in any of the above claim, which is characterized in that in the phase being connect with first wireless device
Between, it repeats to determine the first protection interval and sends the update instruction of first protection interval to first wireless device.
14. according to method described in any of the above claim, which is characterized in that first protection interval is used for time division duplex
(Time Division Duplex, TDD) or half-duplex frequency division duplex (Half Duplex-Frequency Division
Duplex, HD-FDD) operation, which comprises
First protection interval is used between downlink subframe and uplink subframe.
15. according to method described in any of the above claim characterized by comprising
During downlink subframe n, scheduling instruction is sent with scheduling uplink data transmission；
According to n and first protection interval, determine desired uplink subframe to receive data.
16. according to method described in any of the above claim characterized by comprising
During downlink subframe n, down link data is sent；And
According to n and first protection interval, determine that desired uplink subframe is true to receive hybrid automatic repeat-request
Recognize (Hybrid Automatic Repeat reQuest-Acknowledge, HARQ-ACK).
17. according to method described in any of the above claim, which is characterized in that first protection interval of determination includes: meter
It calculates as follows
Wherein,It is the integer amount of protection interval subframe；
TGPIt is the length of the protection interval in the leading format of non scalable cell；
It is from the received round trip delay time of wireless device.
18. a kind of method for supporting the communication range between wireless base station and the first wireless device to extend, which is characterized in that packet
It includes: in wireless device side:
Determine the measurement for indicating distance between the wireless device and the wireless base station；
According to measurement, the data for indicating the distance are determined；
The data are sent to the wireless base station；
Receive the instruction of the used protection interval when communicating with the wireless base station, wherein when the wireless device is located at
When except the first range of the wireless base station, the protection interval has the first numerical value；Described in being located at when the wireless device
When within the scope of described the first of wireless base station, the protection interval has second value, and wherein second value is less than the first number
Value.
19. according to the method for claim 18, which is characterized in that the data include the wireless base station and described wireless
The instruction of two-way time between equipment.
20. according to the method for claim 19, which is characterized in that the instruction of the two-way time is uplink random access letter
It is sent on road.
21. method described in 9 or 20 according to claim 1, which is characterized in that the instruction instruction of the two-way time is described round-trip
Time is the integer amount of subframe.
22. according to the method for claim 21, which is characterized in that exist corresponding multiple from different subframe integer amounts
Leader sequence, which comprises
It selects and uses leader sequence should be for two-way time.
23. the method according to claim 20 or 21, which is characterized in that the instruction of two-way time is that ascending physical signal connects at random
Enter what the connection request message on channel (PRACH) was sent.
24. the described in any item methods of 8-23 according to claim 1 characterized by comprising
According to the data for indicating the distance, judge whether first wireless device is located at except first range；And
It sends and indicates whether first wireless device is located at the mark except first range.
25. according to method described in any of the above claim, wherein from the information that first wireless device is sent include thick
The first instruction of the two-way time of granularity and the second instruction of the two-way time than the first instruction fine granulation.
26. according to the method for claim 25, wherein the second instruction of the two-way time is calculate by the following formula:
Wherein,TRTTThe two-way time of=estimation；GRTT=to the nothing
Granularity known to line base station and the wireless device.
27. according to method described in claim 25 and 26 characterized by comprising
From the wireless base station receiving time lead；
Update two-way time；And
According to the two-way time of the update, the second instruction of two-way time is sent.
28. the described in any item methods of 8-27 according to claim 1 characterized by comprising
During connecting with the wireless base station, the update instruction of protection interval is received.
29. the described in any item methods of 8-28 according to claim 1, which is characterized in that the instruction information of the protection interval is
The integer amount of subframe.
30. according to the method for claim 21, which is characterized in that the integer amount of subframe is calculated by following formula:
Wherein, nGPIt is the integer amount of subframe；TGPIt is the length of the protection interval in the leading format of non-Extended Cell；TRTTIt is
From the received round trip delay time of the wireless devices.
31. the described in any item methods of 8-30 according to claim 1, which is characterized in that first protection interval for TDD or
HD-FDD operation, which comprises
First protection interval is used between downlink subframe and uplink subframe.
32. the described in any item methods of 8-31 include: according to claim 1
During downlink subframe n, scheduling instruction is received with scheduling uplink data transmission；
According to n and the protection interval, uplink subframe is determined to send the data.
33. the described in any item methods of 8-32 according to claim 1 characterized by comprising
During downlink subframe n, down link data is received；And
According to n and the protection interval, uplink subframe is determined, to send hybrid automatic repeat-request confirmation (HARQ-
ACK)。
34. according to method described in any of the above claim, wherein the wireless device is machine type communication device.
35. a kind of wireless base station, which is characterized in that for executing as described in any one of claims 1 to 17 claim
Method.
36. a kind of wireless device, which is characterized in that for executing as described in any one of claim 18 to 34 claim
Method.
37. a kind of computer program product, which is characterized in that including machine readable media, multiple instruction is carried, when by handling
When device executes, so that the processor executes the method as described in any one of claims 1 to 34 claim.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1701814.4A GB2559382B (en) | 2017-02-03 | 2017-02-03 | Systems and methods for cell range extension |
| GB1701814.4 | 2017-02-03 | ||
| PCT/CN2017/116332 WO2018141179A1 (en) | 2017-02-03 | 2017-12-15 | Systems and methods for cell range extension |
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| CN110235457A true CN110235457A (en) | 2019-09-13 |
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| CN201780085138.8A Pending CN110235457A (en) | 2017-02-03 | 2017-12-15 | The system and method for cell range extension |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022077354A1 (en) | 2020-10-15 | 2022-04-21 | Zte Corporation | Resource configuration using the burst spread parameter for wireless communication systems |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3672334A1 (en) * | 2018-12-18 | 2020-06-24 | Gemalto M2M GmbH | Method for estimating timing advance in large cell area |
| US11184872B2 (en) | 2019-04-04 | 2021-11-23 | Qualcomm Incorporated | Reference timing delivery to user equipment with propagation delay compensation |
| CN111918405B (en) * | 2019-05-10 | 2022-12-16 | 中国移动通信有限公司研究院 | Random access method, terminal and network side equipment |
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| Publication number | Publication date |
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| GB2559382B (en) | 2021-10-20 |
| GB201701814D0 (en) | 2017-03-22 |
| WO2018141179A1 (en) | 2018-08-09 |
| GB2559382A (en) | 2018-08-08 |
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