CN1736117A - Method and apparatus for wireless communication in a high velocity environment - Google Patents

Method and apparatus for wireless communication in a high velocity environment Download PDF

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Publication number
CN1736117A
CN1736117A CN 200480000898 CN200480000898A CN1736117A CN 1736117 A CN1736117 A CN 1736117A CN 200480000898 CN200480000898 CN 200480000898 CN 200480000898 A CN200480000898 A CN 200480000898A CN 1736117 A CN1736117 A CN 1736117A
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high velocity
neighbor
mobile radio
radio station
signal
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雅松·H·洛什
达莱·R·安德森
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Motorola Solutions Inc
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Motorola Inc
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Abstract

A communication system (100) transitions from a high velocity mode of operation to a non-high velocity mode of operation based on a movement of a mobile station (106). When the communication system is in a high velocity mode of operation, the communication system promotes pilots from a High Velocity Neighbor Set of the mobile station or a controller (116). When the communication system is in a non-high velocity mode of operation, the communication system promotes pilots from a Neighbor Set of the mobile station or the controller. The communication system may further include a high velocity repeater (104) that, when co-located with the mobile station, is capable of providing a communication link between the mobile station and a radio access network (114) servicing the mobile station.

Description

Be used for carrying out method of wireless communication and device at high velocity environment
Technical field
The present invention relates generally to wireless communication system, and especially, relate to radio communication service is provided in high velocity environment.
Background technology
Interim Standard IS-2000 is adopted by telecommunications industry association (TelecommunicationsIndustry Association), is used for realizing cdma2000  at cellular system.In the cdma2000 communication system, mobile radio station (MS) be dispersed in the geographic area in a plurality of base stations (BS) in any one or a plurality of communication.Each base station is launched pilot frequency channel signal continuously, and it has identical spreading code, but has different code phase offset.Phase deviation allows pilot signal to distinguish mutually, and it allows to distinguish BS thus.Hereinafter, the pilot signal of BS will be called as pilot tone simply.MS monitors pilot tone and measures the pilot energy that receives.
MS by forward link and reverse link in the same way MS provide the BS of radio communication service to communicate by letter.Forward link typically comprises one or more forward traffic channel, one or more forward control channel, and paging channel.Reverse link typically comprises one or more reverse traffic channel, one or more direction control channel, and access channel.In communication process, MS must monitor and safeguard four pilot set consistently.These four pilot set are collectively referred to as pilot set (Pilot Set), comprise active set (Active Set), Candidate Set (CandidateSet), Neighbor Set (Neighbor Set) and residual set (Remaining Set).Active set comprises the pilot tone relevant with the forward traffic channel of distributing to MS.When MS was in idle pulley, active set comprised and the paging channel or the relevant pilot tone of forward control channel that are monitored by MS.Candidate Set comprises such pilot tone, i.e. its current is not in the active set but it has been received and had enough intensity by MS and shows that relevant forward traffic channel can be by successful demodulation.Neighbor Set comprises such pilot tone, and promptly it is emitted to MS by BS, and may become the candidate that is used to switch.Residual set comprises the pilot tone in Neighbor Set, Candidate Set and active set, about all possible pilot tone in the current system of current C DMA Frequency Distribution.
Typically, BS provides communication service to the MS that is arranged in the overlay area of being served by BS.When MS was served by a BS, MS is the pilot channel of searching near BS consistently, to seek the pilot tone that intensity enough surpasses threshold value.MS uses Pilot Strength Measurement Message, notifies relevant intensity enough to surpass definite result of the pilot tone of threshold value to first serving BTS.When MS when first overlay area by BS service moves to second overlay area that is covered by the 2nd BS, communication system makes some pilot tone be upgraded to active set from Candidate Set, and makes some pilot tone be upgraded to Candidate Set from Neighbor Set.Serving BS broadcasts notice MS should upgrade.Then, stop with the communicating by letter of old BS before, when MS began to communicate by letter with the new BS that has been added to active set, " soft handover " taken place.For reverse link, typically, each BS in active set demodulation sign indicating number independently is received from each frame or the grouping of MS.Between each BS decoded frame, carry out ruling by switching center then.
When MS worked in the high velocity environment, such as being positioned at high-speed aircraft as MS, such as in the business aircraft time, traditional operation and the switching of MS had brought problem.Typically, MS comprises the mechanism of Doppler (Doppler) frequency displacement that is used for corrected received signal, and this Doppler frequency shift is because MS moves caused with the speed less than 120 kilometers/hour.Yet when MS moved with the speed above 120 kilometers/hour, MS can not fully compensate the Doppler frequency shift that causes in received signal, caused MS demodulated received signal correctly.And, when MS moves with very high speed, before finishing, current switching may need new switching, and cause the poor efficiency of system, and caused call drop potentially.And pilot tone may change or produce Neighbor Set over to quite continually with relevant BS, so that Neighbor Set is useless to a certain extent.
Therefore, exist being used for the MS of high-speed mobile is carried out the needs of the method and apparatus of switching and Doppler effect correction.
Description of drawings
Fig. 1 is the block diagram of wireless communication system according to an embodiment of the invention.
Fig. 2 is the block diagram of the base station of Fig. 1 according to an embodiment of the invention.
Fig. 3 is the block diagram according to the radio access network controller of Fig. 1 of the present invention.
Fig. 4 is the block diagram of the mobile radio station of Fig. 1 according to an embodiment of the invention.
Fig. 5 is the block diagram of the high velocity repeater of Fig. 1 according to an embodiment of the invention.
Fig. 6 is the logical flow chart according to the high velocity mode of operation of the communication system of Fig. 1 of various embodiments of the present invention.
Fig. 7 is the logical flow chart of communication system that runs on Fig. 1 of fast mode according to embodiments of the invention.
Fig. 8 is the logical flow chart of communication system that runs on Fig. 1 of fast mode according to another embodiment of the present invention.
Embodiment
In order to satisfy to being used for the MS of high-speed mobile is carried out the needs of the method and apparatus of switching and Doppler effect correction, a kind of communication system is provided, it is transformed into non-high velocity mode of operation based on moving of mobile radio station from high velocity mode of operation.When this communication system was in high velocity mode of operation, this communication system made the pilot tone upgrading from the high velocity neighbor set of mobile radio station or controller.When this communication system was in non-high velocity mode of operation, this communication system made the pilot tone upgrading from the Neighbor Set of mobile radio station or controller.This communication system may further include high velocity repeater, and it can provide mobile radio station and serve communication link between the Radio Access Network of this mobile radio station with the mobile radio station co-allocation time.
Usually, embodiments of the invention comprise a kind of method of wireless communication of carrying out in high velocity environment.This method comprises, preserves high velocity neighbor set and Neighbor Set by mobile radio station; Determine whether mobile radio station runs in the high velocity environment; And when mobile radio station runs in the high velocity environment, utilize high velocity neighbor set to make the pilot signal upgrading.
Another embodiment of the present invention comprises a kind of mobile radio station, and it comprises at least one memory device of preserving a plurality of Neighbor Sets, and first Neighbor Set in wherein a plurality of Neighbor Sets comprises Neighbor Set, and second Neighbor Set in a plurality of Neighbor Set comprises high velocity neighbor set.This mobile radio station further comprises the processor that is connected to this at least one memory device, and it determines whether this mobile radio station runs in the high velocity environment, and response runs on determining in the high velocity environment to this mobile radio station, utilizes high velocity neighbor set to make the pilot signal upgrading.
Another embodiment of the present invention comprises a kind of radio access network controller, and it comprises at least one memory device of safeguarding a plurality of Neighbor Sets.This radio access network controller further comprises the processor that is connected to this at least one memory device, and it determines whether run in the high velocity environment by the mobile radio station of this controller service.When this mobile radio station ran in the high velocity environment, this processor was regulated first Neighbor Set in a plurality of Neighbor Sets, and based on the adjusting to first Neighbor Set in a plurality of Neighbor Sets, transmitted the instruction of upgrading pilot tone.When this mobile radio station is not when running in the high velocity environment, this processor is regulated second Neighbor Set in a plurality of Neighbor Sets, and based on the adjusting to second Neighbor Set in a plurality of Neighbor Sets, transmits the instruction of upgrading pilot tone.
Another embodiment of the present invention comprises a kind of method of operating mobile radio station in high velocity environment.This method comprises, determines that mobile radio station runs in the high velocity environment, safeguards Neighbor Set and high velocity neighbor set by mobile radio station.This method further comprises, response runs on determining in the high velocity environment to this mobile radio station, search for the pilot signal relevant seeking the pilot signal that intensity surpasses threshold value, and response surpasses the determining of pilot signal of threshold value to intensity, revise active set with high velocity neighbor set.
Another embodiment of the present invention comprises a kind of mobile radio station, the processor that it comprises at least one memory device of safeguarding Neighbor Set and high velocity neighbor set and is connected to this at least one memory device.This processor determines whether mobile radio station runs in the high velocity environment, and response runs on determining in the high velocity environment to mobile radio station, search for the pilot signal relevant to seek the pilot signal that intensity surpasses threshold value with high velocity neighbor set, and response surpasses the determining of pilot signal of threshold value to intensity, revise active set.
Another embodiment of the present invention comprises a kind of method that is used in high velocity environment upgrading pilot signal.This method comprises, safeguards Neighbor Set and high velocity neighbor set by mobile radio station; At least one relevant pilot signal in search and Neighbor Set and the high velocity neighbor set is to seek the pilot signal that intensity surpasses threshold value; And after definite intensity surpasses the pilot signal of threshold value, send the information of relevant this pilot signal.This method comprises that further the information of relevant this pilot signal of response sends, and receive the instruction that makes pilot signal be upgraded to active set, and response makes pilot signal be upgraded to active set to the reception of this instruction.
Another embodiment of the present invention comprises a kind of radio access network controller, the processor that it comprises at least one memory device of safeguarding Neighbor Set and high velocity neighbor set and is connected to this at least one memory device.This processor receives the information that surpasses the pilot signal of threshold value from the relevant intensity of mobile radio station, determine that this mobile radio station runs in the high velocity environment, and response message receives and mobile radio station is run on determining in the high velocity environment, regulates high velocity neighbor set and transmits information to the mobile radio station corresponding to this adjusting.
Another embodiment of the present invention comprises a kind of radio access network controller, and it comprises at least one memory device of safeguarding Neighbor Set and high velocity neighbor set.This radio access network controller further comprises the processor that is connected to this at least one memory device, and it determines that mobile radio station runs in the high velocity environment, and response is transmitted high velocity neighbor list to mobile radio station being run on determining in the high velocity environment to mobile radio station.
Another embodiment of the present invention comprises a kind of mobile radio station, and it comprises at least one memory device of safeguarding a plurality of Neighbor Sets, and first neighbor list in wherein a plurality of neighbor lists comprises Neighbor Set, and second Neighbor Set in a plurality of Neighbor Set comprises high velocity neighbor set.This mobile radio station further comprises: receiver, and it receives the instruction from radio infrastructure, in order to revise at least one in a plurality of Neighbor Sets; And processor, it is connected to this at least one memory device and can responds at least one the receiver that receives in a plurality of Neighbor Sets of instruction modification.
Another embodiment of the present invention comprises a kind of method that is used for providing at high velocity environment radio communication service, this method comprises, be determined to the move frequency displacement that cause of small part owing to repeater, apply the first frequency skew to first signal that receives by repeater, apply the second frequency skew to the secondary signal that is sent by repeater, wherein each frequency shift (FS) of first frequency skew and second frequency skew is all based on determined frequency displacement.
Another embodiment of the present invention comprises a kind of repeater that can run in the high velocity environment.This repeater comprises processor, it is determined in running on high velocity environment up to the move frequency displacement that cause of small part owing to repeater, first signal that is receiving when repeater is running in the high velocity environment applies the first frequency skew, and the secondary signal that is sending when repeater is running in the high velocity environment applies the second frequency skew, and wherein each of first frequency skew and second frequency skew is all based on determined frequency displacement.
Another embodiment of the present invention comprises a kind of repeater, and it comprises at least one memory device of storing mobile station functions and the processor that is connected to this at least one memory device.This processor is carried out mobile station functions, and by carrying out mobile station functions, can determine the carrier wave relevant and at least one in the modulation scheme with Radio Access Network (RAN), and response automatically is tuned to the frequency relevant with this RAN to carrier wave relevant with this RAN and at least one definite in the modulation scheme.
Another embodiment of the present invention comprises a kind of method that is used at high velocity environment operation mobile radio station.This method comprises, safeguards a plurality of neighbor lists, and first neighbor list in wherein a plurality of neighbor lists comprises high velocity neighbor list, and second neighbor list in a plurality of neighbor list comprises non-high velocity neighbor list.
Another embodiment of the present invention comprises a kind of mobile radio station, it comprises at least one memory device of safeguarding a plurality of neighbor lists, first neighbor list in wherein a plurality of neighbor lists comprises high velocity neighbor list, and second neighbor list in a plurality of neighbor list comprises non-high velocity neighbor list.This mobile radio station further comprises: receiver, and it receives the instruction from radio infrastructure, in order to revise at least one in a plurality of neighbor lists; And processor, it is connected to this at least one memory device and can responds at least one the receiver that receives in a plurality of neighbor lists of instruction modification.
By describing the present invention more all sidedly with reference to figure 1～8.Fig. 1 is the block diagram of wireless communication system 100 according to an embodiment of the invention.Communication system 100 comprises Radio Access Network (RAN) 114, and it comprises a plurality of base stations (BS) 120～129.Each BS among a plurality of BS 120～129 comprises at least one base station transceiver (BTS), this BTS be arranged in each non-high velocity coverage area or carry out wireless connections by the mobile radio station of the sub-district 130～139 of BS service.Communication system 100 further comprises RAN controller 116, preferably, is centralized base station controller (CBSC), and it is connected to each BS among a plurality of BS 120～129.RAN controller 116 comprises mobility manager (MM) 118, and it safeguards the record of the number of the position record of MS and the switching that MS is participated at each mobile radio station (MS) by the service of RAN controller.In another embodiment of the present invention, RAN controller 116 can be distributed between a plurality of BS 120～129.RAN 114 and RAN controller 116 are collectively referred to as terrestrial wireless infrastructure herein.
Communication system 100 further comprises mobile radio station (MS) 106, such as cell phone, radio telephone, with such as the relevant radio modem of the digital terminal equipment (DTE) of PC (PC) or kneetop computer or have the PDA(Personal Digital Assistant) of wireless communication ability.Provide radio communication service by RAN 114 to MS 106, perhaps especially, provide radio communication service by first air interface 108 and/or the combination by second air interface 110, repeater 104 and the 3rd air interface 112 to MS 106 by the BS among a plurality of BS 120～129 of communication system 100.Each air interface 108,110,112 includes forward link, and it comprises a plurality of communication channels, preferably includes at least one paging channel, at least one forward control channel and at least one forward traffic channel.Each air interface 108,110,112 further comprises reverse link, and it comprises a plurality of communication channels, preferably includes at least one access channel, at least one reverse control channel and at least one reverse traffic channel.
When can be with the vehicles 102 of high-speed mobile, such as non-ground traffic tools (such as aircraft) or ground traffic tools (such as high-speed train), when moving in communication system 100, this communication system may further include the high velocity repeater 104 that resides in the vehicles.Work as MS, such as MS 106, when being arranged in the vehicles 102, this MS can communicate by letter with RAN 114 by high velocity repeater 104, rather than with this RAN direct communication.Because MS and high velocity repeater 104 co-allocation, so MS and repeater have all experienced the approximately uniform Doppler frequency shift of the signal correction that exchanges with RAN114.As a result, high velocity repeater 104 can for MS provide MS self the Doppler shift compensation that can not provide.And by the high velocity repeater 104 with MS 106 co-allocation is provided, than the required power level that directly transmits acceptably to RAN 114 of being used for of MS, this MS can launch under lower power level.By reducing the transmitted power level of MS 106, reduced MS and disturbed other to involve the possibility of the communication of RAN 114 or high velocity repeater 104.In addition, by reducing the transmitted power level of MS 106, can protect the power supply that the finite lifetime of electric power is provided to MS, such as battery.
Communication system 100 comprises wireless packet data communication system.For MS, such as MS106, be connected in order to set up with the grouped data of the external network (not shown) of the infrastructure that is connected to communication system 100, each in repeater 104, BS 120～129 and the RAN controller 116 is operated according to known wireless telecommunications protocols.By operating according to known wireless telecommunications protocols, the user of MS 106 can guarantee, MS 106 can and can set up packet data communication link about external network via this infrastructure with infrastructure-based communication.Preferably, communication system 100 is operated according to following agreement: 3GPP2 and TIA/EIA (telecommunications industry association/electronic industries association) IS-2000 or IOS (interoperability standard (Interoperability Specification)) standard, it provides about the compatibility standard of cdma2000 or 1xEV-DO, system, wherein air interface 108,110 and each communication channel of 112 comprise at least one orthogonal code, such as the Walsh sign indicating number.This standard code the radio telecommunications system operating protocol, comprise radio system parameters and call processing program.Yet, those of ordinary skill in the art will be appreciated that, communication system 100 can be operated according in the multiple wireless packet data communication system any one, such as other CDMA technology (as W-CDMA), global system for mobile communications (GSM) communication system, time division multiple access (TDMA) communication system, frequency division multiple access (FDMA) communication system or OFDM (OFDM) communication system.
As the MS of communication system 100, such as MS 106, when participating in an efficient communication, MS runs on soft handover (SHO) pattern, and wherein a plurality of BS in the active set of this MS and this MS carry out radio communication.That is, when participating in efficient communication, MS is to each the BS broadcast data packets corresponding to the pilot tone in the active set of this MS.For example, when MS 106 ran on non-fast mode, this MS can provide service by the BS 120 of Serving cell 130, and can carry out 3 to soft handover with the BS 121 of Serving cell 131 and the BS 122 of Serving cell 132.The corresponding pilot signal of the BS relevant with the sub-district of serving this MS simultaneously, promptly the pilot signal (hereinafter being called as " pilot tone ") corresponding to BS120, BS 121 and BS 122 is the active set of this MS.In other words, this MS is in the soft handover (SHO) with BS 120,121 and 122, and these BS are relevant with the sub-district 130,131 and 132 of this MS of service, and these BS are active sets of this MS.
In another embodiment of the present invention, i.e. " branch sector " embodiment, each sub-district 130～139 can be divided into a plurality of geographic sector area (sector).Each sector in a plurality of geographic sector area provides service by the BTS among the BS of this sub-district of service.In minute sector embodiment, the MS that resides in the cell sector provides service by the BTS that serves this sector, and the active set of this MS comprises, with the relevant pilot tone of BTS of this MS of service, and with other sectors of serving this sub-district or the relevant pilot tone of BTS of serving the sector of other sub-districts.
Fig. 2 is the block diagram of BS 120～129 according to an embodiment of the invention.As shown in Figure 2, each BS 120～129 comprises at least one BTS 202, and it is connected to antenna 204.Antenna 204 comprises at least one antenna element 206 (showing nine), and it produces basically radio frequency (RF) the signal radiation figure with the earth surface coplane, and is designed to provide communication service to land-based communication equipment.In minute sector embodiment, antenna 204 can be a directional antenna, and it is divided into a plurality of antenna sectors, and each sector in wherein a plurality of antenna sectors is corresponding to the geographic sector area separately in a plurality of geographic sector area of respective cell, and provides communication service to it.Each antenna sector comprises the aerial array with a plurality of antenna elements.By utilizing aerial array to the MS broadcast singal that is arranged in by the cell sector of this aerial array service, BS can utilize in many known beam-forming methods, is used to broadcast this signal.
As BS 120～129th, during high speed BS, such as BS 120 and 126～129, antenna 204 may further include one or more non-terrestrial antenna elements 208 (showing), is used for transmitting and from its received signal to non-ground communication facilities.This one or more non-terrestrial antenna elements 208 produces radio frequency (RF) signal radiation figure, and it is positioned at the top of the horizontal plane of the radiation diagram that comprises at least one antenna element 206, has avoided the interference to the signal of these at least one antenna element 206 emissions thus.In addition, can be designed to basically and the polarised direction quadrature of the wireless signal of these at least one antenna element 206 radiation certainly from the polarised direction of the wireless signal of this one or more non-terrestrial antenna elements 208 radiation, further make any interference minimum that produces with respect to this at least one antenna element 206 by this one or more non-terrestrial antenna elements 208 thus.For example, can be by the wave beam of this one or more non-terrestrial antenna elements 208 radiation by perpendicular polarization, with respect to horizontal polarization by the wave beam of these at least one antenna element 206 radiation.
Each high speed BS 120,126～129, except providing communication service, further provide communication service to the MS that is arranged in each high velocity coverage area 140,146～149 relevant with this BS to the MS that is arranged in the non-high velocity coverage area relevant (being overlay area 130 and 136～139) with this BS.High velocity coverage area 140,146～149 can be wider than their non-high velocity coverage area 130 and 136～139 separately, this is the needs of the switching of the minimizing when running on fast mode because of MS, and further because such fact, the MS that promptly is arranged in high-speed aircraft usually is in the horizon communication with serving BS broadcasts, and it allows the wider overlay area of BS.
Fig. 3 is the block diagram of RAN controller 116 according to an embodiment of the invention.RAN controller 116 comprises: processor 302, such as one or more microprocessor, microcontroller, digital signal processor (DSP), their combination and other equipment known to a person of ordinary skill in the art; With one or more associated storage device 304, such as random-access memory (ram), dynamic random access memory (DRAM) and/or read-only memory (ROM) or their equivalent, its service data and the program that can carry out by corresponding processor.Unless specify, otherwise all be to carry out herein by the processor 302 of RAN controller by RAN controller 116 or by all functions that MM 118 carries out.
For each BS by the controller service, such as BS 120, this one or more memory device 304 is further safeguarded Neighbor Set 306 and high velocity neighbor set 308.Neighbor Set 306 comprises such list of pilots, that is, this pilot tone is current not to be in the active set or Candidate Set relevant with MS, but it might become the candidate of switching when communication system 100 is in non-high velocity mode of operation.Similarly, high velocity neighbor set 308 comprises such list of pilots, promptly, this pilot tone is current not to be in the active set or Candidate Set relevant with MS, but it might become the candidate of switching when communication system 100 is in high velocity mode of operation, that is, this pilot tone is to become the candidate of switching and the pilot tone relevant with high speed BS.
MM 118 realizes in the processor 302 of controller and one or more memory device 304.MM 118 is responsible for managing mobility by definition and RAN 144 relevant active set, Neighbor Set and high velocity neighbor set, and responsible coordination multicast/overcharge group.
Fig. 4 is the block diagram of MS 106 according to an embodiment of the invention.MS 106 comprises: receiving element 402 and transmitter unit 404, they are connected to processor 406, such as one or more microprocessor, microcontroller, digital signal processor (DSP), their combination and other equipment known to a person of ordinary skill in the art; With one or more associated storage device 408, such as random-access memory (ram), dynamic random access memory (DRAM) and/or read-only memory (ROM) or their equivalent, its service data and the program that can carry out by corresponding processor.Unless specify, otherwise all be to be carried out by the processor 406 of this MS by all functions that MS106 carries out herein, it is via receiving element 402 received signals, and transmits via transmitter unit 404.
This one or more memory device 408 is safeguarded active set 410, Neighbor Set 412 and residual set 414.When MS participates in efficient communication, active set 410 comprises the list of pilots relevant with the forward traffic channel of distributing to this MS, perhaps when MS was in idle pulley, active set 410 comprised paging channel or the relevant list of pilots of forward control channel that monitors with this MS.Neighbor Set 412 comprises such list of pilots, that is, this pilot tone is current not to be in the active set or Candidate Set of MS, but it might become the candidate of switching.Residual set 414 comprises such list of pilots, that is, except the member of active set 410, Candidate Set, Neighbor Set 412 or the high velocity neighbor set 416 of MS, it is relevant with every other BS in the communication system 100.This one or more memory device 408 may further include high velocity neighbor set 416, and it comprises the list of pilots relevant with high speed BS, and in the current active set or Candidate Set that is not in MS of this pilot tone, but it might become the candidate of switching.When MS 106 comprises high velocity neighbor set 416, do not comprise the pilot tone of this high velocity neighbor set in the pilot tone of residual set.
Fig. 5 is the block diagram of high velocity repeater 104 according to an embodiment of the invention.Repeater 104 comprises receiving element 502 and transmitter unit 504, they are connected to processor 506, such as one or more microprocessor, microcontroller, digital signal processor (DSP), their combination and other equipment known to a person of ordinary skill in the art.Repeater 104 further comprises one or more memory device 508 that is connected to processor 506, such as random-access memory (ram), dynamic random access memory (DRAM) and/or read-only memory (ROM) or their equivalent, its service data and the program that can carry out by corresponding processor.Unless specify, otherwise all be to be carried out by the processor 506 of this repeater by all functions that repeater 104 is carried out herein, it is via receiving element 502 received signals, and transmits via transmitter unit 504.
Mobile radio station (MS) function 510 is embedded in one or more memory device 508, carry out the typically data and the program of the function relevant such as allowing repeater 104 with MS, particularly multiband MS and multi-mode MS (such as the MS that can run on a plurality of frequency bands and further can run on a plurality of communication systems (such as, but be not limited among CDMA, GSM and the TDMA two or more) MS) function.Especially, repeater 104, particularly one or more memory device 508, comprise such program, it allows repeater 104, and particularly processor 506, pilot tone and the paging channel of scanning RAN 114, and determine carrier wave and/or the modulation scheme relevant thus with this RAN.In case determine carrier wave and/or the modulation scheme relevant with this RAN, repeater 104 is automatically to be tuned to the frequency of being correlated with forward link and the reverse link of this RAN with identical method that multiband multimode MS is tuned to by the frequency of the communication system of MS detection.As a result, when the resident vehicles that repeater is arranged wherein, promptly the vehicles 102, and in plurality of communication systems when mobile, this repeater can automatically be provided with himself to run in its current resident any system.
Communication system 100 comprises changeover program, can make MS 106 switch to the air interface of another better quality from first air interface of quality deterioration by this changeover program.When MS 106 runs in the non-high velocity environment, that is, when MS 106 fixes, perhaps with low speed, when moving with the speed that is lower than 120 kilometers/hour, communication system 100 provides the switching of this MS according to known handoff technique.For example, when MS 106 is effectively in Traffic Channel and by first base station, during such as BS 120 services, this MS searches for the pilot channel of neighbor bss consistently, i.e. the pilot channel of BS in the Neighbor Set 412 is to seek the pilot tone that intensity enough surpasses threshold value.This MS gives first serving BTS with this event notice.When this MS from by a BS, first sub-district that is BS 120 service is to by the 2nd BS, and when moving such as second sub-district of BS 124 services, communication system 100 makes some pilot tone from Neighbor Set 412, such as with BS 124 and 125 relevant pilot tones, be upgraded to active set 410.Serving BS broadcasts, promptly the neighbor list updating message of BS 120 by broadcasting on Traffic Channel notified this upgrading to this MS.Based on the reception to the neighbor list updating message, the list of pilots of safeguarding in 106 pairs of Neighbor Sets 412 of MS and the active set 410 is carried out suitable modification.When new BS added in the active set 210, MS 106 beginnings were with new BS communication.MS 106 further can stop when active set is removed and its communicate by letter at old BS.
When MS 106 runs in the high velocity environment, that is, when this MS was arranged at a high speed (such as the speed greater than 120 kilometers/hour) mobile vehicles (such as the vehicles 102), traditional operation and the switching of MS had brought problem.Typically, MS comprises the mechanism of Doppler (Doppler) frequency displacement that is used for corrected received signal, and this Doppler frequency shift is to move caused by MS with the speed less than 120 kilometers/hour.Yet, when MS moves with very high speed, for example, having when being designed to provide the speed of maximal rate of Doppler shift compensation above MS, MS can not fully compensate the Doppler frequency shift that causes in received signal.And, when MS moves with very high speed, before finishing, current switching may need new switching, and cause the poor efficiency of system, and caused call drop potentially.And pilot tone may change or produce Neighbor Set 412 over to quite continually with relevant BS, so that Neighbor Set becomes useless to a certain extent.
As a result, work as MS, when running in the high velocity environment such as MS 106, communication system 100 is transformed into high velocity mode of operation.Fig. 6 is the logical flow chart 600 of the high velocity mode of operation of communication system 100 according to an embodiment of the invention.Logical flow chart begins (602) when MS 106 activates (604) in communication system 100.After activating in communication system 100, RAN controller 116 provides (606) one or more neighbor list and high velocity neighbor list to this MS, and this MS receives (608) this one or more neighbor list and high velocity neighbor list from RAN controller 16.The pilot tone that comprises in the Neighbor Set 306 of this neighbor list based on RAN controller 116.The pilot tone that comprises in the high velocity neighbor set 308 of this high velocity neighbor list based on RAN controller 116.In one embodiment of the invention, wherein MS is in idle pulley, and RAN controller 116 can provide neighbor list and high velocity neighbor list to this MS via paging channel.In another embodiment of the present invention, wherein MS is that effectively RAN controller 116 can provide neighbor list and high velocity neighbor list to this MS via forward traffic channel on forward traffic channel.In another embodiment of the present invention, RAN controller 116 can respond MS is run on determining in the high velocity environment, as hereinafter described in detail, transmits high velocity neighbor list via forward traffic channel to this MS.
Communicate by letter with RAN 114 at MS 106, particularly any moment of communicating by letter with serving BS broadcasts 120, this MS can perhaps communicate by letter with RAN with 112 via repeater 104 and air interface 110 via air interface 108 and RAN direct communication.The forward link of reference herein, paging channel, forward traffic channel and forward control channel can refer to forward link, paging channel, forward traffic channel and the forward control channel of air interface 108 or air interface 110 and 112.Similarly, the reverse link of reference herein, access channel, reverse traffic channel and reverse control channel can refer to reverse link, paging channel, reverse traffic channel and the reverse control channel of air interface 108 or air interface 110 and 112.
After receiving one or more neighbor list and high velocity neighbor list, MS 106 stores neighbor list that (610) receive as Neighbor Set 412 in one or more memory device 408 of this MS, and/or the high velocity neighbor list that receives of storage (610) is as high velocity neighbor set 416.Typically, Neighbor Set 306 and neighbor list include such list of pilots, that is, this pilot tone is corresponding among near a plurality of BS the BS relevant with the active set of this MS each.Than Neighbor Set and neighbor list, high velocity neighbor list comprises such list of pilots, that is, this pilot tone is corresponding to BS different on a plurality of geography, such as among the BS 120,126～129 each, promptly corresponding to " at a high speed " BS.For example, high velocity neighbor set 308 can comprise all and each " N " pilot tone that BS is relevant that with high velocity neighbor list its intermediate value " N " depends on the designer of communication system 100.In one embodiment of the invention, be confirmed as with the distribution of the related BS of high velocity neighbor set 308 and high velocity neighbor list, when the MS high-speed mobile, make and switch the number minimum, make BS scatter to such an extent that be not very wide simultaneously, make the MS of high-speed mobile when the signal quality about the BS of active set drops to unacceptable level, can find acceptable signal.In addition, the BS related with high velocity neighbor set 308 and high velocity neighbor list can be fully approaching, makes MS can run on soft handoff mode.
Communication system 100, particularly MS 106 or RAN controller 116 determine further whether (612) MS 106 runs in the high velocity environment.When MS 106 was in idle pulley, this MS can determine voluntarily whether this MS runs in the high velocity environment.When the efficient communication on this MS participation Traffic Channel, RAN 114, particularly serve the BS of this MS, and promptly BS 120, and perhaps the RAN controller 116, can determine whether this MS runs in the high velocity environment.
In one embodiment of the invention, MS 106 or RAN controller 116 can determine whether MS 106 runs in the high velocity environment based on the number of the different best pilot signal of being determined by this MS in the cycle at preset time.When MS 106 was in idle pulley, along with this MS moves through communication system 100, this MS monitored the pilot tone of the BS relevant with active set 410 and Neighbor Set 412 consistently.MS 106 periodically determines the quality metric about each pilot tone that is monitored by MS 106, such as frame error rate, signal to noise ratio (snr) or signal strength signal intensity.Based at each pilot tone that is monitored by MS 106 and definite quality metric, MS 106 determines best pilot signal.Then MS 106 can with about the information stores of determined best pilot signal in one or more memory device 408 of this MS, and/or the information about determined best pilot signal can be delivered to serving BS broadcasts 120, and be delivered to RAN controller 116 with the form of Pilot Strength Measurement Message (PSMM) thus.Result as the periodically definite best pilot signal of MS has determined a plurality of best pilot signal.
Based on a plurality of best pilot signal of being determined by MS 106, this MS, serving BS broadcasts or RAN controller 116 can be determined the number in preset time definite different best pilot signal in the cycle.Preferably, each best pilot signal in the different best pilot signal of this some is different from other the best pilot signal in the different best pilot signal of this some, avoided considering such situation thus, wherein MS runs on each the fringe region in a plurality of sub-districts, and wherein MS switches between the pilot tone in a plurality of sub-districts when determining optimal pilot back and forth.Then, this MS, serving BS broadcasts or RAN controller 116, as long as it is suitable, will compare with best pilot signal number threshold value at the number of preset time definite optimal pilot in the cycle, this threshold value can be stored in respectively in one or more memory device 304,408.When the number of the optimal pilot of determining in the cycle at preset time had exceeded best pilot signal number threshold value, this MS, serving BS broadcasts or RAN controller 116 can determine that this MS runs in the high velocity environment.
In another embodiment of the present invention, MS 106 or RAN controller 116 can determine whether this MS runs in the high velocity environment based on the time cycle of this MS by identical BS service.That is, when each MS 106 changes the BS of these MS of service, MS 106 or RAN controller 116 will be stored in about the moment that MS changes serving BS broadcasts in separately one or more memory device 304,408.Based on the moment of being stored, MS 106 or RAN controller 116 further determined the time spans of these MS by the serving BS broadcasts service of nearest variation, i.e. cycle time, and it is stored in separately one or more memory device 304,408.This MS or RAN controller compare determined time span with the time threshold in one or more memory device 304,408 that is stored in separately then.When this time span during less than this time threshold, this MS or RAN controller determine that MS 106 runs in the high velocity environment.Yet, not only to activate to move into adjacent sub-district then in order to ensure MS at the edge of sub-district, MS 106 or RAN controller 116 can further be determined the continuous number of times of determined time span less than time threshold.When determined time span has exceeded the serving BS broadcasts change threshold less than the read-around ratio of time threshold, this MS or RAN controller determine that this MS runs in the high velocity environment, and wherein the serving BS broadcasts change threshold can be stored in separately one or more memory device 304,408.
In another embodiment of the present invention, MS 106 can determine whether this MS runs in the high velocity environment based on by the Doppler frequency shift of this MS from the signal of RAN 114 receptions.After the pilot tone that receives from the BS that serves this MS, MS 106 determines the Doppler frequency shift of these pilot tones, and determined Doppler frequency shift is compared with the Doppler frequency shift threshold value that is stored in one or more memory device 304.When determined Doppler frequency shift surpassed the Doppler frequency shift threshold value, this MS determined that it runs in the high velocity environment.
In another embodiment of the present invention, RAN controller 116 can determine whether this MS runs in the high velocity environment based on the number that involves the switching of this MS at preset time in the cycle.When each MS 106 participates in switching, about the information stores of this switching in MM 118.As a result, MM 118 has safeguarded the record at the preset time switching number that MS 106 is participated in the cycle, and the number that will switch compares with switching the number threshold value.When outnumbering of the switching that participates in the cycle at preset time switched the number threshold value, RAN controller 116 or MM 118 determined that MS 106 runs in the high velocity environment.
Response runs on determining in the high velocity environment to MS, and communication system 100 conversions (614) finish (616) to high velocity mode of operation and logic flow 600.In one embodiment of the invention, when communication system 100 was in high velocity mode of operation and MS 106 and is in idle pulley, this MS used high velocity neighbor set 416 to make pilot tone be upgraded to active set 410.In another embodiment of the present invention, when communication system 100 was in high velocity mode of operation and MS 106 and participates in communication via forward traffic channel effectively, RAN controller 116 used high velocity neighbor set 308 to push neighbor lists to MS 106 to upgrade.When being in fast mode, make pilot tone be upgraded to active set 410 by using high velocity neighbor set 416 or high velocity neighbor set 308, communication system 100 can begin to limit the switching at high speed BS.
Fig. 7 is the logical flow chart according to embodiments of the invention high velocity mode of operation of communication system 100 when MS 106 is in idle pulley.Because MS 106 is in idle pulley, so RAN 114, particularly service high-speed BS,, can not transmit lastest imformation to high velocity neighbor list 416 via forward traffic channel such as BS 120.Logical flow chart 700 beginnings (702) are when MS 106 determines that (704) this MS runs in the high velocity environment voluntarily, and are described in detail as mentioned.Response runs on determining in the high velocity environment to MS, and this MS searches for the relevant pilot tone of (706) and high velocity neighbor set 412 consistently, with the pilot tone of searching intensity above threshold value.This threshold value is maintained in one or more memory device 408 of this MS.When MS 106 determines the pilot tone that (708) and high velocity neighbor set 412 are relevant, for example, the pilot tone relevant with BS 128, intensity be during above threshold value, this MS make from the pilot tone of high velocity neighbor set 416 upgrade (710) arrive active set 410.MS 106 spontaneously carries out (712) idle pulley and switches based on the pilot tone that comprises in the active set 410.Logic flow 700 finishes (714) then.
Fig. 8 is the logical flow chart according to embodiments of the invention high velocity mode of operation of communication system 100 when the communication that MS 106 participates in carrying out via forward traffic channel effectively.Logical flow chart 800 beginning (802) in MS 106 via one or more forward traffic channel, such as the forward traffic channel relevant with air interface 108 or with each air interface 110 and 112 forward traffic channels of being correlated with; And one or more reverse traffic channel, such as the reverse traffic channel relevant with air interface 108 or with each air interface 110 and 112 relevant reverse traffic channels, when providing service (804) by a BS.RAN 114, such as RAN controller 116 or serving BS broadcasts 120, determine that (806) MS 106 runs in the high velocity environment, and is described in detail as mentioned.
MS searches for the relevant pilot tone of Neighbor Set in (808) and one or more memory device 408 that is stored in MS consistently, and to seek the pilot tone that intensity surpasses threshold value, this threshold value is safeguarded in one or more memory device 408 of MS.In one embodiment of the invention, the Neighbor Set that utilizes when search for pilots of MS is that the MS that is in idle pulley is being transformed into the Neighbor Set that utilizes recently before the effective model.For example, when being in the non-high velocity environment recently before MS 106 is being transformed into effective model, the MS nearest Neighbor Set that utilizes when search for pilots that is in idle pulley can be a Neighbor Set 412.Therefore, when execution in step 808, the pilot tone that MS 106 search and Neighbor Set 412 are relevant.As another example, when being in the high velocity environment recently before MS 106 is being transformed into effective model, the MS nearest Neighbor Set that utilizes when search for pilots that is in idle pulley can be a high velocity neighbor set 416.Therefore, when execution in step 808, the pilot tone that MS 106 search and high velocity neighbor set 416 are relevant.Yet the designer of system 100 can utilize any one in the many algorithms that are used for the Neighbor Set that utilized when step 808 determines that MS is in search for pilots.
After definite (810) pilot frequency intensity surpasses threshold value, MS 106 is preferably by transmitting Pilot Strength Measurement Message (PSMM) via one or more reverse traffic channel to RAN, notice (812) RAN 114, especially, via serving BS broadcasts 120 notice RAN controllers 116, intensity surpasses definite result of the pilot tone of threshold value.Response is to the reception (814) of intensity above definite result's of the pilot tone of threshold value relevant information, response runs on determining in the high velocity environment to MS 106, and when determined pilot tone is relevant with high speed BS, RAN controller 116 is revised the list of pilots that safeguard (816) in high velocity neighbor set 308, this high velocity neighbor set 308 is stored in one or more memory device 304.For example, RAN controller 114 can add strong pilot tone to high velocity neighbor set 308, and/or remove weak pilot tone from high velocity neighbor set.
Then, the adjusting that RAN controller 116 carries out at high velocity neighbor set 308 based on controller, compiling command M S renewal (is Neighbor Set 412 or high velocity neighbor set 416 by Neighbor Set and/or the renewal that this MS is used for search for pilots by the active set that this MS safeguards, and/or active set 410) message, and with its transmission (818) to MS 106.In one embodiment of the invention, the message that command M S 106 upgrades Neighbor Sets and/or active set can comprise, command M S 106 add or deletion active set 410 in BS or switch to the switching message of new serving BS broadcasts.In another embodiment of the present invention, the message that command M S upgrades Neighbor Set and/or active set can comprise neighbor list updating message (NLUM).In another embodiment of the present invention, the message that command M S upgrades Neighbor Set and/or active set can comprise that system is provided with message or system parameters message, and the neighbor list messages that the notice pilot tone is upgraded to Neighbor Set and/or the active set of this MS is followed in its back.
Upgrade to command M S after the Neighbor Set and/or the message of renewal that is used for search for pilots by this MS in reception (820) by the active set of this MS, MS 106 is based on the message that receives, revise Neighbor Set and/or active set that (822) are used by this MS, that is, Neighbor Set 412, high velocity neighbor set 416 and/or active set 410.That is, based on the message that receives, MS 106 can make pilot tone be upgraded to Neighbor Set 412, high velocity neighbor set 416 and/or active set 410.Because the pilot tone by 116 upgradings of RAN controller is the pilot tone relevant with high speed BS, therefore the pilot tone that should upgrade is relevant with high speed BS.MS 106 can begin (824) with the communication that has been added to the new BS of active set then, and/or stop and communicating by letter from the old BS of active set removing.MS 106 further begins to monitor the relevant pilot tone of any BS of (826) and the Neighbor Set that adds this MS use to, and/or, stop to monitor the relevant pilot tone of any BS of removing and not adding active set 410 or the Candidate Set of MS to the Neighbor Set that uses from this MS.Logic flow 800 finishes (828) then.
When MS moves with very high speed, when promptly running in the high velocity environment, only make the pilot tone relevant be upgraded to Neighbor Set and the active set that uses by this MS with high speed BS, like this, communication system 100 has reduced the number of the switching that may occur and the number of times that optimal pilot redefines, improve system effectiveness thus, reduced the processing load of system, and reduced the possibility of call drop in handoff procedure.In one embodiment of the invention, the MS that is in the idle pulley determines voluntarily whether this MS runs in the high velocity environment.After definite this MS ran in the high velocity environment, this MS was transformed into the search pilot tone relevant with the high velocity neighbor set 416 (relative with Neighbor Set 412) of this MS, and makes pilot tone be upgraded to the active set 410 of this MS from high velocity neighbor set.In another embodiment of the present invention, when MS was effective on Traffic Channel, RAN controller 116 determined whether MS run in the high velocity environment.After definite this MS ran in the high velocity environment, this RAN controller was transformed into, and will be pushed to this MS from the pilot tone of the high velocity neighbor set 308 (relative with Neighbor Set 306) of RAN controller.
Again with reference to figure 6, in another embodiment of the present invention, after communication system 100 is transformed into high velocity mode of operation, MS 106, service high-speed BS, such as BS 120 or RAN 114, particularly the RAN controller 116, can determine that (618) this MS no longer runs in the high velocity environment.Response no longer runs on determining in the high velocity environment to MS, and communication system 100 conversion (620) are to traditional operator scheme of non-high speed.
In one embodiment of the invention, wherein MS 106 is in idle pulley, and MS 106 determines that voluntarily this MS no longer runs in the high velocity environment.After definite MS 106 no longer runs in the high velocity environment, MS 106 automatically begins the search pilot tone relevant with Neighbor Set 412 (relative with high velocity neighbor set 416), and make pilot tone be upgraded to active set 410 from this Neighbor Set, like this, communication system 100 is transformed into non-high velocity mode of operation.
In another embodiment of the present invention, wherein MS 106 participates in the communication carried out via forward traffic channel effectively, and RAN controller 116 determines that MS 106 no longer run in the high velocity environment.After definite MS 106 no longer runs in the high velocity environment, RAN controller 116 will be pushed to MS 106 from the pilot tone of Neighbor Set 306 (relative with high velocity neighbor set 312), in order to Neighbor Set or the active set that is upgraded to this MS, like this, communication system 100 is transformed into non-high velocity mode of operation.
In one embodiment of the invention, MS 106 or RAN controller 116 can determine whether MS 106 runs in the high velocity environment based on the number of the different best pilot signal of being determined by this MS in the cycle at preset time.When MS 106 was in idle pulley, even run in the fast mode, this MS still monitored the pilot tone of the BS relevant with active set 410 and Neighbor Set 412 consistently.MS 106 periodically determines the quality metric of each pilot tone that is monitored, and determines best pilot signal based on this quality metric.Then MS 106 can with about the information stores of determined best pilot signal in one or more memory device 408 of this MS, and/or the information about determined best pilot signal can be delivered to serving BS broadcasts 120, and be delivered to RAN controller 116 thus.
Based on a plurality of best pilot signal of being determined by MS 106, this MS, serving BS broadcasts or RAN controller 116 can be determined the number in preset time definite different best pilot signal in the cycle.Then, this MS, serving BS broadcasts or RAN controller 116 as long as it is suitable, will compare with best pilot signal number threshold value at the number of preset time definite optimal pilot in the cycle.When the number of the optimal pilot of determining in the cycle at preset time during less than best pilot signal number threshold value, this MS, serving BS broadcasts or RAN controller 116 can determine that this MS no longer runs in the high velocity environment.
In another embodiment of the present invention, MS 106 or RAN controller 116 can determine whether this MS runs in the high velocity environment based on the time cycle of this MS by identical BS service.That is, when each MS 106 changes the BS of these MS of service, MS 106 or RAN controller 116 will be stored in about the moment that MS changes serving BS broadcasts in separately one or more memory device 304,408.Based on the moment of being stored, MS 106 or RAN controller 116 further determined the time spans of these MS by the serving BS broadcasts service of nearest variation, i.e. cycle time, and it is stored in separately one or more memory device 304,408.This MS or RAN controller compare determined time span with the time threshold value then.When this time span surpassed this time threshold, perhaps when the read-around ratio of determined time span overtime threshold value had exceeded the serving BS broadcasts change threshold, this MS or RAN controller can determine that this MS no longer runs in the high velocity environment.
In another embodiment of the present invention, MS 106 can determine whether this MS runs in the high velocity environment based on by the Doppler frequency shift of this MS from the signal of RAN 114 receptions.After the pilot tone that receives from the BS that serves this MS, MS 106 determines the Doppler frequency shift of these pilot tones.When determined Doppler frequency shift during less than the Doppler frequency shift threshold value, MS 106 can determine that this MS no longer runs in the high velocity environment.
In another embodiment of the present invention, RAN controller 116 can determine whether this MS runs in the high velocity environment based on the number that involves the switching of this MS at preset time in the cycle.When each MS 106 participates in switching, about the information stores of this switching in MM 118.As a result, MM 118 has safeguarded the record of the switching number that MS 106 is participated in.The number of determining the switching that participates in the cycle at preset time when RAN controller 116 is when switching the number threshold value, and RAN controller 116 can determine that MS 106 no longer runs in the high velocity environment.
By making communication system 100 be transformed into non-high velocity mode of operation, provide the flexibility of operation for communication system 100 from high velocity mode of operation.Communication system 100 utilizes the pilot tone relevant with high speed BS to be used for switch determining when MS 106 high-speed mobile, and cancels the restriction to pilot tone when MS 106 keeps static or low speed to move.Therefore, communication system 100 provides adaptable handover operation, and it can adapt with the speed of MS.
Still with reference to figure 6, as mentioned above, communicate by letter with RAN 114, particularly any moment of communicating by letter with serving BS broadcasts 120 at MS 106, this MS can perhaps communicate by letter with RAN with 112 via repeater 104 and air interface 110 via air interface 108 and RAN direct communication.Therefore, in one embodiment of the invention, MS 106 can set up (622) via the communication link of air interface 108 with RAN 114.Yet in another embodiment of the present invention, this MS can be arranged in the vehicles that comprise high velocity repeater, such as the vehicles 102 and repeater 104.In this case, MS 106 can build (624) via air interface 110, repeater 104 and air interface 112 communication link with RAN 114.MS 106 sets up the communication via repeater 104 after can or being transformed into high velocity mode of operation after the existence of determining repeater 104.
Repeater 104 periodically sends low power beacon or pilot tone, signal.In one embodiment of the invention, when MS 106 monitored the pilot tone of BS, this MS further monitored the beacon signal of repeater 104.Response is to the detection of beacon signal, and this MS compares the intensity of beacon signal with the beacon signal intensity threshold value that is stored in one or more memory device 408.When the beacon signal intensity that is detected surpasses the beacon signal intensity threshold value, this MS is by carrying out traditional switching, and do not consider whether this MS runs in the fast mode or whether by instruction transformation to fast mode, be tuned to the air interface 112 relevant with repeater 104.In another embodiment of the present invention, as the replacement of carry out switching, the signal of repeater 104 can be rendered as similar to the multipath component of the signal of RAN 114.In this embodiment, the finger manager of MS 106 (finger manager) can be taken away the time delay of repeater signal from the signal of RAN 114.In other embodiments of the invention, MS 106 can not monitor the beacon signal of repeater 104, receive the system overhead information that this MS of instruction switches to fast mode until MS, perhaps, although this MS monitors the beacon signal of repeater consistently, but can arrive air interface 112 by untuned, promptly switch to repeater 104, receive system overhead information until this MS.
Switch to high velocity mode of operation and be tuned to after the forward link and reverse link of air interface 112, MS 106 via repeater 104 with RAN 114 communications (626).That is, MS 106 is the communication of RAN 114 via the reverse link of air interface 112 to repeater 104 transmission targets.Repeater 104 communication that will be received from MS 106 is delivered to RAN 114 via the reverse link of air interface 110 then.Next, RAN 114 is the communication of MS 106 via the forward link of air interface 110 to repeater 104 transmission targets.Repeater 104 communication that will be received from RAN 114 is delivered to MS106 via the forward link of air interface 110 then.
With RAN 114 switched communications the time, repeater 104 provides Doppler shift compensation to being received from RAN 114 with the signal that sends to RAN 114.By the repeater that the high speed Doppler shift compensation can be provided is provided, communication system 100 has overcome MS, the shortage of the ability of the Doppler frequency shift that is caused by this MS high-speed mobile (moving with the speed that surpasses 120 kilometers/hour typically) such as 106 pairs of compensation of MS.
Repeater 104 provides the high speed Doppler shift compensation by monitoring the relevant pilot tone of one or more BS among a plurality of BS 120～129 with communication system 100.For example, similar in any concrete moment to MS 106, can provide radio communication service to repeater 104 by serving BS broadcasts, and repeater 104 can monitor the pilot tone relevant with serving BS broadcasts.Repeater 104 obtains each Doppler frequency shift that receives pilot tone, and based on determined Doppler frequency shift, determines a plurality of Doppler shift compensation factors.When repeater 104 as about the repeater of the signal of exchange between MS 106 and RAN 114 time, this repeater is that the signal of MS 106 applies the first Doppler shift compensation factor in a plurality of Doppler shift compensation factors to being received from RAN 114 and target, and is that the signal of RAN 114 applies the second Doppler shift compensation factor in a plurality of Doppler shift compensation factors to being received from MS 106 and target.
Doppler frequency shift and Doppler shift compensation fix on really and are known in the art.For example, in one embodiment of the invention, as (U.S.) patent No.6, describe in detail in 449,489, repeater 104 can determine to receive the Doppler frequency shift of pilot tone, and further determine the Doppler shift compensation factor, the whole content of this patent is introduced herein and is classified reference as.In another embodiment of the present invention, the Doppler frequency shift that repeater 104 can following definite reception pilot tone, and further determine the Doppler shift compensation factor.Relevant with BS and comprise regularly synchronously by each pilot tone that repeater 104 monitors, be used for decoding by the signal of relevant BS emission.Repeater 104 comprises internal oscillator, and by this internal oscillator and each pilot tone that is monitored or BS, it can determine the center of the pilot channel relevant with this BS.When the vehicles 102 of wherein having settled repeater 104 moved with the speed that increases, this repeater can determine to be received from the frequency shift (FS) of the pilot tone of the BS that is monitored, i.e. Doppler frequency shift.This repeater is stored in determined frequency shift (FS) in the memory of repeater.When repeater 104 as about the repeater of the signal of exchange between MS 106 and RAN 114 time, this repeater is determined the Doppler effect correction factor based on determined frequency shift (FS), and the determined Doppler effect correction factor is applied to the signal that is received from RAN 114 and sends to RAN 114.
Be applied to the signal that is received from RAN 114 and sends to RAN 114 by definite Doppler effect correction factor and with the determined Doppler effect correction factor, when MS runs in the high velocity environment and during with RAN 114 switched communications, repeater 104 provides Doppler effect correction for MS 106.That is, repeater 104 receptions are the signal of MS 106 by RAN 114 transmission and target.Repeater 104 is regulated and is received from the signal of RAN 114 with compensating for doppler frequency shifts, promptly, apply the first frequency skew to produce the first frequency shifted signal to the signal that is received from RAN 114, and in order to the Doppler frequency shift of compensation signal experience when being delivered to repeater 104 by RAN 114, this Doppler shift compensation is based on the Doppler frequency shift of the pilot tone that is received by this repeater.Repeater 104 transmits adjusted signal via the forward link of air interface 112 to MS 106 then.It is the signal of RAN 114 that repeater 104 further receives by MS 106 transmission and target.Repeater 104 is regulated and is received from the signal of MS 106 so that the compensation to Doppler frequency shift to be provided, promptly, apply the second frequency skew to produce the second frequency shifted signal to the signal that is received from MS 106, and in order to compensate the Doppler frequency shift that when being delivered to RAN114 via air interface 110, will be incorporated in the signal by repeater 104, the frequency predistortion in fact is provided, and this Doppler shift compensation is equally based on the Doppler frequency shift of the pilot tone that is received by this repeater.Repeater 104 transmits adjusted signal via the reverse link of air interface 110 to RAN 114 then.
Although illustrate and described the present invention particularly by the reference specific embodiments of the invention, but those skilled in the art is to be understood that, under not departing from the scope prerequisite of stating in claims of the present invention, can carry out multiple variation, and can use equivalent to replace its element.Therefore, it is illustrative that this specification and accompanying drawing should be considered to, rather than restrictive, and all these variations and replace and should contain within the scope of the present invention.
For specific embodiment, interests, advantage have above been described and at the solution of problem.Yet, these interests, advantage, at the solution of problem and any interests, advantage or solution are occurred or the significant more any factor that becomes, should not be interpreted as important, required or the basic feature or the factor of any or whole claims.As used herein, term " comprises ", " comprising " or any its version, purpose is to contain the inclusion of nonexcludability, the program, method, object or the device that comprise series of elements thus not only comprise the element that these are listed, but also may comprise element that other are not clearly listed or intrinsic element for this program, method, object or device.And, be to be understood that, the use of (if existence) relation property term, such as " first " and " second ", " top " and " end " or the like, only for being used to that an entity or behavior are distinguished mutually with another entity or behavior, but not require or mean the relation or the order of any reality between this entity or behavior.

Claims (23)

1. one kind is carried out method of wireless communication in high velocity environment, comprising:
Safeguard high velocity neighbor set and Neighbor Set by mobile radio station;
Determine whether mobile radio station runs in the high velocity environment; And
When mobile radio station runs in the high velocity environment, utilize high velocity neighbor set to make the pilot signal upgrading.
2. the method for claim 1 further comprises, when mobile radio station runs on fast mode:
Determine whether this mobile radio station no longer runs in the high velocity environment; And
When this mobile radio station no longer runs in the high velocity environment, be transformed into and utilize Neighbor Set to make the pilot signal upgrading.
3. mobile radio station comprises:
At least one memory device, it safeguards a plurality of contiguous set, first contiguous set in wherein a plurality of contiguous set comprises Neighbor Set, and second contiguous set in a plurality of contiguous set comprises high velocity neighbor set;
Processor, it is connected to this at least one memory device, and it determines whether this mobile radio station runs in the high velocity environment, and response runs on determining in the high velocity environment to this mobile radio station, utilizes high velocity neighbor set to make the pilot signal upgrading.
4. the mobile radio station of claim 3, wherein, when this mobile radio station ran on fast mode, processor determined further whether this mobile radio station no longer runs in the high velocity environment, and when this mobile radio station no longer runs in the high velocity environment, utilize Neighbor Set to make the pilot signal upgrading.
5. radio access network controller comprises:
At least one memory device, it safeguards a plurality of contiguous set; With
Processor, it is connected to this at least one memory device, it determines whether run in the high velocity environment by the mobile radio station of this controller service, when this mobile radio station runs in the high velocity environment, this processor is regulated first contiguous set in a plurality of contiguous set, and based on adjusting to first contiguous set in a plurality of contiguous set, transmit the instruction of upgrading pilot tone, and when this mobile radio station is not when running in the high velocity environment, this processor is regulated second contiguous set in a plurality of contiguous set, and, transmit the instruction of upgrading pilot tone based on adjusting to second contiguous set in a plurality of contiguous set.
6. the radio access network controller of claim 5, wherein, when mobile radio station runs in the high velocity environment, processor determines further whether this this mobile radio station no longer runs in the high velocity environment, and when this mobile radio station no longer runs in the high velocity environment, make this mobile radio station be transformed into non-high velocity mode of operation, wherein this mobile radio station no longer utilizes high velocity neighbor set to be used for switching.
One kind in high velocity environment the operation mobile radio station method, comprising:
Determine whether this mobile radio station runs in the high velocity environment;
Safeguard Neighbor Set and high velocity neighbor set by mobile radio station;
Response runs on determining in the high velocity environment to this mobile radio station, searches for the pilot signal relevant with high velocity neighbor set to seek the pilot signal that intensity surpasses threshold value; And
Response surpasses the determining of pilot signal of threshold value to intensity, revise active set.
8. mobile radio station comprises:
At least one memory device, it safeguards Neighbor Set and high velocity neighbor set; And processor, it is connected to this at least one memory device, it determines whether mobile radio station runs in the high velocity environment, response runs on determining in the high velocity environment to mobile radio station, search for the pilot signal relevant to seek the pilot signal that intensity surpasses threshold value with high velocity neighbor set, and response surpasses the determining of pilot signal of threshold value to intensity, revise active set.
9. method that is used in high velocity environment upgrading pilot signal comprises:
Safeguard Neighbor Set and high velocity neighbor set by mobile radio station;
At least one relevant pilot signal in search and Neighbor Set and the high velocity neighbor set is to seek the pilot signal that intensity surpasses threshold value;
After definite intensity surpasses the pilot signal of threshold value, send the information of relevant this pilot signal;
The information of relevant this pilot signal of response sends, and receives to make pilot signal be upgraded to the instruction of active set; And
Response makes pilot signal be upgraded to active set to the reception of this instruction.
10. radio access network controller comprises:
At least one memory device, it safeguards Neighbor Set and high velocity neighbor set; And processor, it is connected to this at least one memory device, it receives the information that surpasses the pilot signal of threshold value from the relevant intensity of mobile radio station, determine that this mobile radio station runs in the high velocity environment, and run on determining in the high velocity environment in response to message pick-up with to mobile radio station, regulate high velocity neighbor set and to the information of mobile radio station transmission corresponding to this adjusting.
11. the radio access network controller of claim 10, wherein, described processor points out that by transmission the system of the modification of high velocity neighbor list is provided with message and transmits variation, and further transmits the modification of high velocity neighbor list.
12. a radio access network controller comprises:
At least one memory device, it safeguards Neighbor Set and high velocity neighbor set; With
Processor, it is connected to this at least one memory device, and it determines that mobile radio station runs in the high velocity environment, and in response to mobile radio station being run on determining in the high velocity environment, transmits high velocity neighbor list to mobile radio station.
13. a mobile radio station comprises:
At least one memory device, it safeguards a plurality of contiguous set, first neighbor list in wherein a plurality of neighbor lists comprises Neighbor Set, and second contiguous set in a plurality of contiguous set comprises high velocity neighbor set;
Receiver, it receives the instruction from radio infrastructure, in order to revise at least one in a plurality of contiguous set; With
Processor, it is connected to this at least one memory device and receiver, and response receives at least one in a plurality of contiguous set of instruction modification.
14. the mobile radio station of claim 13, wherein, the described processor pilot signal that further search is relevant with high velocity neighbor set is to seek the pilot signal that intensity surpasses threshold value, after definite intensity surpasses the pilot signal of threshold value, send the information of relevant this pilot signal, the information of relevant this pilot signal of response sends, and receives the variation at high velocity neighbor list, and, revise high velocity neighbor set based on the variation that is received at high velocity neighbor list.
15. a method that is used for providing at high velocity environment radio communication service comprises:
Be determined to the move frequency displacement that cause of small part owing to repeater;
Apply the first frequency skew to first signal that receives by repeater;
Apply the second frequency skew to the secondary signal that sends by repeater; And
Wherein, each frequency shift (FS) of first frequency skew and second frequency skew is all based on determined frequency displacement.
16. the method for claim 15 wherein, applies the first frequency skew and comprises:
Receive first signal from radio infrastructure;
Apply the first frequency skew to produce the first frequency shifted signal to this first signal; And send this first frequency shifted signal to mobile radio station with the repeater co-allocation.
17. the method for claim 15 wherein, applies the second frequency skew and comprises:
Receive secondary signal from Wireless Telecom Equipment with the repeater co-allocation;
Apply the second frequency skew to produce the second frequency shifted signal to this secondary signal; And send this second frequency shifted signal to radio infrastructure.
18. repeater that can run in the high velocity environment, this repeater comprises processor, it is determined in running on high velocity environment up to the move frequency displacement that cause of small part owing to repeater, first signal that is receiving when repeater is running in the high velocity environment applies the first frequency skew, the secondary signal that is sending when repeater is running in the high velocity environment applies the second frequency skew, and wherein, each of first frequency skew and second frequency skew is all based on determined frequency displacement.
19. the repeater of claim 18, wherein, described processor applies the first frequency skew by following method: receive first signal from radio infrastructure, apply the first frequency skew with generation first frequency shifted signal to this first signal, and send this first frequency shifted signal to mobile radio station with the repeater co-allocation.
20. the repeater of claim 18, wherein, described processor applies the second frequency skew by following method: receive secondary signal from the mobile radio station with the repeater co-allocation, apply the second frequency skew with generation second frequency shifted signal to this secondary signal, and send this second frequency shifted signal to radio infrastructure.
21. a repeater comprises:
At least one memory device, it stores mobile station functions; With
Processor, it is connected to this at least one memory device, it carries out mobile station functions, and by carrying out mobile station functions, can determine the carrier wave relevant and at least one in the modulation scheme with Radio Access Network (RAN), and response automatically is tuned to the frequency relevant with this RAN to carrier wave relevant with this RAN and at least one definite in the modulation scheme.
22. method that is used at high velocity environment operation mobile radio station, comprise: safeguard a plurality of neighbor lists, wherein, first neighbor list in a plurality of neighbor lists comprises high velocity neighbor list, and second neighbor list in a plurality of neighbor list comprises non-high velocity neighbor list.
23. a mobile radio station comprises:
At least one memory device, it safeguards a plurality of neighbor lists, wherein, first neighbor list in a plurality of neighbor lists comprises high velocity neighbor list, and second neighbor list in a plurality of neighbor list comprises non-high velocity neighbor list;
Receiver, it receives the instruction from radio infrastructure, in order to revise at least one in a plurality of neighbor lists; With
Processor, it is connected to this at least one memory device and receiver, can respond at least one that receives in a plurality of neighbor lists of instruction modification.
CN 200480000898 2003-07-24 2004-07-09 Method and apparatus for wireless communication in a high velocity environment Pending CN1736117A (en)

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US60/489,796 2003-07-24
US10/872,636 2004-06-21

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Cited By (8)

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Publication number Priority date Publication date Assignee Title
CN101340204A (en) * 2007-07-04 2009-01-07 鼎桥通信技术有限公司 Signal processing method and apparatus suitable for high-speed moving environment
CN102186198A (en) * 2009-12-04 2011-09-14 英特尔公司 Apparatus and method for upgrading airlink in wireless system
CN102932808A (en) * 2011-08-09 2013-02-13 鼎桥通信技术有限公司 High-speed scene signal sending method and repeater
CN103477672A (en) * 2011-04-14 2013-12-25 高通股份有限公司 Beacon signals for repeaters within a wireless communications system
CN103607231A (en) * 2013-11-27 2014-02-26 上海电机学院 Fast wave beam switching method with multiple antennas in high-speed mobile environment
CN103607362A (en) * 2013-11-27 2014-02-26 上海电机学院 Method for eliminating multifrequency deviation under high-speed mobile environment through multiple antennas
CN104115532A (en) * 2011-12-30 2014-10-22 高通股份有限公司 Apparatus and method for dynamic pilot acquisition in a wireless communication system
CN111757407A (en) * 2016-03-11 2020-10-09 珠海市磐石电子科技有限公司 Method and system for switching channels in multiple channels

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101340204A (en) * 2007-07-04 2009-01-07 鼎桥通信技术有限公司 Signal processing method and apparatus suitable for high-speed moving environment
CN102186198A (en) * 2009-12-04 2011-09-14 英特尔公司 Apparatus and method for upgrading airlink in wireless system
CN102186198B (en) * 2009-12-04 2015-05-20 英特尔公司 Apparatus and method for upgrading airlink in wireless system
CN103477672A (en) * 2011-04-14 2013-12-25 高通股份有限公司 Beacon signals for repeaters within a wireless communications system
CN102932808A (en) * 2011-08-09 2013-02-13 鼎桥通信技术有限公司 High-speed scene signal sending method and repeater
CN102932808B (en) * 2011-08-09 2015-04-22 鼎桥通信技术有限公司 High-speed scene signal sending method and repeater
CN104115532A (en) * 2011-12-30 2014-10-22 高通股份有限公司 Apparatus and method for dynamic pilot acquisition in a wireless communication system
CN103607231A (en) * 2013-11-27 2014-02-26 上海电机学院 Fast wave beam switching method with multiple antennas in high-speed mobile environment
CN103607362A (en) * 2013-11-27 2014-02-26 上海电机学院 Method for eliminating multifrequency deviation under high-speed mobile environment through multiple antennas
CN103607362B (en) * 2013-11-27 2017-01-18 上海电机学院 Method for eliminating multifrequency deviation under high-speed mobile environment through multiple antennas
CN103607231B (en) * 2013-11-27 2017-03-01 上海电机学院 The fast beam changing method of multiple antennas is utilized under high-speed mobile environment
CN111757407A (en) * 2016-03-11 2020-10-09 珠海市磐石电子科技有限公司 Method and system for switching channels in multiple channels

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