CN102098120A - Communication quality judging method, mobile station, base station and communication system - Google Patents
Communication quality judging method, mobile station, base station and communication system Download PDFInfo
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Abstract
The invention relates to a communication quality judging method, a mobile station, a base station and a communication system. High-speed grouped data communication is preformed by a high-capacity transmission channel like an E-DCH (enhanced-dedicated channel), so that the communication quality of an uplink has to be good. However, under the status that the uplink is unbalanced, the mobile station can not estimate the image quality of the uplink from the image quality of a downlink. Therefore, the path loss is obtained according to the setting power of a joint pilot frequency channel informed by the base station and the receiving power of a joint pilot frequency channel received in the mobile station, the receiving power of the base station is estimated according to the path loss, and the SIR (surface insulation resistance) of the base station is estimated by the base station-informed interference power and the estimated receiving power, so that the communication quality of the uplink is judged.
Description
The application is be on April 20th, 2005, application number the applying date for " 200580049478.2 (PCT/JP2005/007538) ", denomination of invention divides an application for the application for a patent for invention of " communication quality determination methods, travelling carriage, base station and communication system ".
Technical field
The present invention relates to constitute to use CDMA (Code Division Multiple Access: code division multiple access) be made as the travelling carriage of the communication system of communication standard, the travelling carriage of the communication quality of estimating uplink when relating in particular to soft handover.
Background technology
In recent years,, adopt the multiple communication standard that was called for the 3rd generation in the International Telecommunication Union, it is used as IMT-2000 as high speed CDMA mobile communication standard.(FDD:Frequency Division Duplex: Frequency Division Duplexing (FDD)), calendar year 2001 begins to do commercial service in Japan as one of them W-CDMA.The W-CDMA standard, the 3GPP of its standardizing body (3
RdGeneration Partnership Project: the 3rd generation partner planning) the 1st standard is decided to be version Release 99 (the version name of concluding in 1999: 3.X.x).Current, as the redaction of Release 99, regulation Release 4 and Release 5, and working out Release 6.
Below, the main channel that simple declaration is relevant.Dedicated Physical Control Channel) and DPDCH (Dedicated Physical Data Channel: Dedicated Physical Data Channel) as the channel of Release 99 correspondences, the physical layer channel of distributing to travelling carriage separately has DPCCH (Dedicated Physical Control Channel:.DPCCH sends the various control informations (using pilot signal, transmitting power control signal etc. synchronously) of physical layer.DPDCH sends (the Media Access Control: the medium access control) the various data of layer (the high-end protocol layer of physical layer) from MAC.Additional disclosure once, will be used for MAC layer and physical layer the handing-over data channel be called transmission channel (Transport channel).Among the Release 99, will be called DCH (Dedicated Channel: dedicated channel) with DPDCH corresponding transmission channel as physical layer channel.Above-mentioned DPCCH and DPDCH are set in up link and down link both sides.
For the grouped data of seeking down link sends efficient, import HSDPA (High Speed Downlink Packet Access: high speed downlink packet access inserts) technology among the Release 5, and add HS-PDSCH (High Speed-Physical Downlink Shared Channel: the high-speed physical downlink shared channel) and HS-SCCH (High Speed-Shared Control Channel: the high speed shared control channel), the physical layer channel of using as down link.HS-PDSCH and HS-SCCH are used for a plurality of travelling carriages.HS-PDSCH is identical with Release 99 pairing DPDCH, also sends the data from the MAC layer.Control information (sending data-modulated mode, grouped data scale etc.) when HS-SCCH sends HS-PDSCH transmission data.Add among the Release 5 HS-DPCCH (High Speed-DedicatedPhysical Control Channel: High-Speed Dedicated Physical Control Channel), the physical layer channel of using as up link.The reception judged result (ACK/NAK) and downlink wireless environmental information (the CQI:Channel Quality Information: channel quality information) send to the base station of the data that travelling carriage will send HS-PDSCH with HS-DPCCH.
Mode with the transmitting-receiving of the continuous data of main imagination sound conversation is compiled into Release 99.Add the HSDPA that can do downlink high speed packet data communication among the Release5, but the standard of not establishment imagination up link high-speed packet data communication is still used Release 99 standards.Thereby, even travelling carriage carries out such the bursting property transmission of grouped data to the base station, also must often distribute special-purpose individual channel (DCH and DPDCH) to each travelling carriage, when consideration is popularized the packet data requirements raising of up direction because of the Internet, according to the viewpoint of effectively utilizing Radio Resource, existing problems.So,, import the technology of E-DCH (Enhanced DCH: strengthen DCH) among the research Release 6 for the Radio Resource of realizing up direction effectively utilizes and the high-speed radio resource allocation.The E-DCH technology is also referred to as HSUPA (High Speed Uplink Packet Access: the High Speed Uplink Packet data insert) sometimes.
The E-DCH technology can be with the AMC that is imported by HSDPA among the Release 5 (Adaptive Modulation and Coding: technology, HARQ (Hybrid Automatic Repeat reQuest: technology etc. h-arq), the also available short transmission time interval (TTI:Transmission Time Interval) adaptive modulation and coding).E-DCH means the transmission channel that expands existing transmission channel DCH, and sets to such an extent that be independent of DCH.Add E-DPDCH (Enhanced-DPDCH: strengthen DPDCH) and E-DPCCH (Enhanced-DPCCH: strengthen DPCCH) among the Release 6.E-DPDCH and E-DPCCH are equivalent to DPDCH before the Release 5 and the physical channel of DPCCH, and E-DPDCH sends the data from the MAC layer, and E-DPCCH sends control information.Also add E-AGCH (Enhanced-Absolute Grant Channel: strengthen absolute grant channel), the E-RGCH (Enhanced-Relative Grant Channel: hardening constituent is to authorization channel) of notice scheduling result, the E-HICH (E-DCH HARQ Acknowledgement Indicator Channel:E-DCH HARQ confirms indicator channel) that notice receives judged result (ACK/NAK) among the Release 6.Establishment is used for the communication system of the above-mentioned explanation of 3GPP technical specification TS25.309v6.1.0 record of E-DCH.
Non-patent literature 1:3
RdGeneration Partnership Project Technical Specification Group Radio Access Network; Feasibility Study for Enhanced Uplink for UTRA FDD (Release 6) 3GPP TS 25.309 V6.1.0 (2004-12)
, realize high-speed packet data communication with the big volume transport channel that E-DCH is such, the communication quality of necessary up link is good.That is, in the soft handover, set a plurality of base station selected uplink communication quality good base station of the travelling carriage of E-DCH, therefore need to confirm the communication quality of up link from communication.Yet, use is with frequency separation up link and down link (FDD:Frequency Division Duplex: in the communication system of W-CDMA system Frequency Division Duplexing (FDD)), even the linkage communication quality that travelling carriage can directly be grasped is good, the communication quality of up link is also not necessarily good.Like this, up link is different with communication quality in the down link, thus between base station and travelling carriage, produce communicate by letter not good enough, the throughput reduction of whole system.This phenomenon is called link imbalance.Produce under the state of link imbalance, travelling carriage can not be according to the communication quality of linkage communication quality estimating uplink.
The TPC that travelling carriage can transmit according to the base station (Transmit Power Control: transmission power control), the communication quality of estimating uplink.(Dedicated Physical Control Channel: the received power S that obtains behind pilot power Dedicated Control Channel) and the interference power I of base station obtain SIR (Signal to Interference Ratio: signal-to-jamming ratio) according to the DPCCH that measures the travelling carriage transmission in the base station, and this SIR and target SIR compared, thereby produce TPC.The SIR that compares and measures and the result of target SIR are if the communication quality of up link than the communication quality good (for example measuring SIR 〉=target SIR) of regulation, sends the TPC order (reducing order) that indication reduces transmitted power to travelling carriage.On the other hand, during the communication quality difference of the communication quality of up link ratio regulation (measuring SIR＜target SIR), the TPC that produces travelling carriage indication rising transmitted power orders (order raises).That is, when the TPC of reception order indication reduced transmitted power, it is good that travelling carriage is judged as uplink communication quality.Otherwise when the TPC of reception order indication increased transmitted power, it is bad that travelling carriage can roughly be speculated as the communication quality of up link.
With above explanation is such with the communication quality of sir measurement up link and by whether satisfying the Poewr control method that target SIR is controlled up-link transmit power, be called " closed loop (Closed Loop) ".Closed loop further comprises " interior ring (Inner Loop) " and " outer shroud (Outer Loop) " these 2 rings.The SIR of the signal after the Rake (multipath search) of interior each time slot of ring measurement is synthetic, and the increase and decrease of control transmitted power make this measurement sir value equal target SIR.On the other hand, even outer shroud is because the identical identical quality of reception (BLER:Block Error Rate (data block error rate), BER:Bit Error Rate (error rate)) that also may not form of sir value, therefore on long interval, measure the quality of reception, and according to this quality of reception measured value correction target SIR.
Yet the TPC order of exterior ring power control usefulness is formed by 2, and does not carry out error correction, so the TPC order itself that travelling carriage receives may make mistakes.That is, only with the communication quality of TPC order estimating uplink, reliability is low.Existing problems.And travelling carriage can not be judged the uplink communication quality the best to which base station when sending indication from a plurality of base stations and reduce the TPC order of transmitted power with the travelling carriage of a plurality of base station communications.The object of the present invention is to provide a kind of travelling carriage of energy high accuracy estimating uplink communication quality and the communication system of the communication quality of the high accuracy up link that can estimate travelling carriage.Particularly, its purpose is to provide a kind of travelling carriage that can select the base station of uplink communication quality the best when obtaining " the simulation SIR " of base station according to interference volume and path loss and setting the big capacity Packet Data Channel of the such up link of E-DCH in travelling carriage.
Summary of the invention
Communication quality determination methods of the present invention comprises following processing: according to the received power of the described common pilot channel that receives in the setting power of the common pilot channel of base station notice and the travelling carriage, the path loss of obtaining path loss is measured and is handled; Measure the path loss of measuring in the processing according to transmitted power and path loss that travelling carriage sends, estimate that the upward signal received power of the upward signal received power of base station is estimated to handle; And, estimate that the SIR of signal of base station interference ratio estimates to handle according to the upward signal received power that the interference power and the upward signal received power of base station notice are estimated the base station that processing is estimated.
Travelling carriage of the present invention is provided with: the base station is sent the 1st data channel that transmits big capacity grouped data, transmit the sending part of the 1st control channel of the control data that relates to this 1st data channel; Receive the reception judged result, base station of the 1st data channel of judging in the schedule information, base station of the 1st data channel acceptance division with the announcement information of notification channel notice; According to the received signal that this acceptance division receives, the path loss measurement section of measuring route loss from the base station; And control part, the path loss that this control part is measured according to the transmitted power and the path loss measurement section of sending part transmission, estimate the upward signal received power of base station, calculate signal-to-jamming ratio from the interference power of acceptance division reception and the upward signal received power of estimation, and select to set the base station of the 1st data channel according to this signal-to-jamming ratio.
Base station of the present invention is provided with: receiving mobile transmits the 1st data channel of Large Volume Data grouping, is related to the 1st data channel that the 1st control channel of the control data of this 1st data channel transmits and the acceptance division of described the 1st control data by transmission; Measure the interference power measurement section of interference power; And send the 1st data channel schedule information, judge the reception judged result of the reception result of described the 1st data channel, with the sending part of notification channel to the announcement information of travelling carriage notice, interference power that the interference power measurement section is measured.
Communication system of the present invention, comprise base station and travelling carriage, this base station has and is received in the 1st data channel that up direction transmits big capacity grouped data, is related to the grouped data that the 1st control channel of the control data of this 1st data channel transmits and the upward signal acceptance division of control data by transmission; Measure the interference power measurement section of interference power; And the downstream signal sending part that sends the interference power that the schedule information of the 1st data channel, the reception judged result of judging the reception result of the 1st data channel, announcement information and interference power measurement section measure, this travelling carriage has with the 1st data channel, the 1st control channel the base station is sent upward signal sending part, receiving scheduling information, the reception judged result of grouped data and control data, the downstream signal acceptance division of announcement information; According to the received signal that this acceptance division receives, the path loss measurement section of measuring route loss from the base station; And control part, this control part sends the transmitted power of signal and the path loss that the path loss measurement section is measured according to the upward signal sending part, estimate the upward signal received power of base station, from interference power and upward signal received power, calculate signal-to-jamming ratio, and, select to set the base station of the 1st data channel according to this signal-to-jamming ratio.
Communication quality determination methods of the present invention comprises the received power according to the described common pilot channel that receives in the setting power of the common pilot channel of base station notice and the travelling carriage, and the path loss of obtaining path loss is measured and handled; Measure the path loss of measuring in the processing according to transmitted power and path loss that travelling carriage sends, estimate that the upward signal received power of the upward signal received power of base station is estimated to handle; And estimate to handle the upward signal received power of the base station of estimating according to the interference power and the upward signal received power of base station notice, the SIR that estimates the signal of base station interference ratio estimates to handle, and therefore has to discern in the soft handover effect to the communication quality of the up link of each base station at travelling carriage.
Travelling carriage of the present invention is provided with the base station is sent the 1st data channel that transmits big capacity grouped data, transmits the sending part of the 1st control channel of the control data that relates to this 1st data channel; Receive the reception judged result, base station of the 1st data channel of judging in the schedule information, base station of the 1st data channel acceptance division with the announcement information of notification channel notice; According to the received signal that this acceptance division receives, the path loss measurement section of measuring route loss from the base station; And control part, the path loss that this control part is measured according to the transmitted power and the path loss measurement section of sending part transmission, estimate the upward signal received power of base station, calculate signal-to-jamming ratio from the interference power of acceptance division reception and the upward signal received power of estimation, and select to set the base station of the 1st data channel according to this signal-to-jamming ratio, therefore have and can discern in the soft handover the communication quality of the up link of each base station and suitable base station sets is obtained the effect of the good E-DCH of uplink communication quality at travelling carriage.
Base station of the present invention is provided with the 1st data channel that receiving mobile transmits the Large Volume Data grouping, is related to the 1st data channel that the 1st control channel of the control data of this 1st data channel transmits and the acceptance division of described the 1st control data by transmission; Measure the interference power measurement section of interference power; And send the 1st data channel schedule information, judge the reception judged result of the reception result of described the 1st data channel, with the sending part of notification channel to the announcement information of travelling carriage notice, interference power that the interference power measurement section is measured, therefore have the effect that can estimate the SIR of each base station at travelling carriage.
Communication system of the present invention, comprise base station and travelling carriage, this base station has and is received in the 1st data channel that up direction transmits big capacity grouped data, is related to the grouped data that the 1st control channel of the control data of this 1st data channel transmits and the upward signal acceptance division of control data by transmission; Measure the interference power measurement section of interference power; And the downstream signal sending part that sends the interference power that the schedule information of the 1st data channel, the reception judged result of judging the reception result of the 1st data channel, announcement information and interference power measurement section measure, this travelling carriage has with the 1st data channel, the 1st control channel the base station is sent upward signal sending part, receiving scheduling information, the reception judged result of grouped data and control data, the downstream signal acceptance division of announcement information; According to the received signal that this acceptance division receives, the path loss measurement section of measuring route loss from the base station; And control part, this control part sends the transmitted power of signal and the path loss that the path loss measurement section is measured according to the upward signal sending part, estimate the upward signal received power of base station, from interference power and upward signal received power, calculate signal-to-jamming ratio, and according to this signal-to-jamming ratio, select to set the base station of the 1st data channel, therefore have and to discern in the soft handover the communication quality of the up link of each base station and suitable base station sets is obtained the effect of the good E-DCH of uplink communication quality at travelling carriage.
Description of drawings
Fig. 1 is the key diagram that the composition of mobile communication system is shown.
Fig. 2 is the key diagram of the wireless channel of explanation base station and travelling carriage.
Fig. 3 is the block diagram of composition that the travelling carriage of embodiment of the present invention 1 is shown.
Fig. 4 is the block diagram that the composition of base station is shown.
Fig. 5 is the key diagram that the explanation travelling carriage is estimated the notion of up SIR.
Fig. 6 is the key diagram of the notion of explanation path loss.
Fig. 7 is the key diagram of the notion of explanation interference volume.
Fig. 8 is the processing of interference volume is notified in explanation to travelling carriage from the base station a key diagram.
Fig. 9 is the flow chart of the processing of measuring route loss in the explanation travelling carriage.
Figure 10 is the flow chart that the upward signal received power is estimated in explanation.
Figure 11 is the flow chart of explanation processing of the travelling carriage during with AG notice interference volume from the base station.
Figure 12 is the key diagram of notion that the system that utilizes method of expression group ID is shown.
Figure 13 is the key diagram that the system of AG notice interference volume is used in explanation.
Figure 14 is the flow chart of explanation processing of the travelling carriage during with RG notice interference volume from the base station.
Figure 15 is the key diagram that the system of RG notice interference volume is used in explanation.
Figure 16 is that explanation uses E-RGCH to measure the flow chart of the processing of interference volume.
Figure 17 is the key diagram that the structure of the pilot channel that carries overload indicator is shown.
Figure 18 is the identical key diagram that Overload Indicator (overload indicator) notice interference volume is used in explanation.
Figure 19 is that explanation uses Overload Indicator (overload indicator) to measure the identical key diagram of interference volume.
Label declaration
The 100th, travelling carriage, the 101st, the base station, the 102nd, base-station control apparatus, the 200th, DCH, the 201st, E-DCH, the 202nd, CPICH, the 203rd, BCH, the 300th, control part, the 301st, control and treatment portion, the 302nd, DPCH interpolation/deletion handling part, the 303rd, DPCH sending part, the 304th, E-DCH interpolation/deletion handling part, the 305th, E-DCH sending part, the 306th, modulation portion, the 307th, power amplification portion, the 308th, antenna, the 309th, low noise enlarging section, the 310th, demodulation section, the 311st, CPICH acceptance division, the 312nd, announcement information acceptance division, the 313rd, path loss measurement section, the 314th, base station interference amount management department, the 315th, SIR control part, the 316th, calculating part, the 317th, path loss management department, the 318th, up received power management department, the 319th, SIR management department, the 320th, DPCH acceptance division, the 321st, new channel acceptance division, the 322nd, interference volume position handling part, the 400th, control part, the 401st, protocol processes portion, the 402nd, DPCH interpolation/deletion handling part, the 403rd, the DPCH sending part, the 404th, announcement information sending part, the 405th, CPICH sending part, the 406th, modulation portion, the 407th, power amplification portion, the 408th, antenna, the 409th, low noise enlarging section, the 410th, demodulation section, the 411st, the DPCH acceptance division, the 412nd, E-DCH acceptance division, the 413rd, interference volume measurement section, the 414th, interference volume notice portion, the 415th, new channel sending part, the 416th, uplink power control portion.
Embodiment
Fig. 1 is the key diagram that the composition of mobile communication system is shown.Among Fig. 1, travelling carriage (UE:User Equipment; Subscriber equipment) the 100th, that the user utilizes, for example portable telephone, portable information terminal (PDA:Personal Digital Assistant; Personal digital aid (PDA)), the mobile communications device of automobile telephone etc.Travelling carriage 100 passes through wireless channel with base station 101, carries out data transmit-receive.The transmitted power of base station 101 control travelling carriages or dispatch etc. is handled the allocation of radio resources of travelling carriage carrying out.Base-station control apparatus (RNC:Radio Network Controller; Radio network controller) 102 management a plurality of base stations (Node B) are to carrying out relaying from the transmission data of not shown core network (Core Network) and travelling carriage.Base station 101 and base-station control apparatus 102 lumped together be called UTRAN (Universal Terrestrial Random Access Network: universal grounding is Access Network at random).
Fig. 2 is the key diagram of the wireless channel of explanation base station and travelling carriage.Among Fig. 2, individual channel (DCH:Dedicated Channel; Dedicated channel) the 200th, send the channel that is arranged on up link and this both direction of down link that data are used.Particularly, comprise independent physical channel (the DPDCH:Dedicated Physical Data Channel that transmits user data; Dedicated Physical Data Channel), the independent physical channel of transmitting control data (DPCCH:Dedicated Physical Control Channel; Dedicated Physical Control Channel) physical channel of these 2 systems.At 3GPP (3
RdGeneration Partnership Project: stipulate this DCH200 in the standard of R99 (Release 1999) the 3rd generation partner planning).Expanding individual channel 201 (E-DCH:Enhanced DCH) is for the up direction at mobile to base station sends the channel that big capacity grouped data is provided with, and is set in up link.E-DCH is identical with DCH, comprises the physical channel that transmits these 2 systems of E-DPCCH (the 1st control channel) that E-DPCH (the 1st data channel) that user data uses and transmitting control data use.In the standard of the Release 6 of 3GPP, stipulate this E-DCH 201.
Among Fig. 2, Common Pilot Channel 202 (CPICH:Common Pilot Channel) is used to estimate channel channel, that be arranged on down link.Common Pilot Channel 202 is the shared channels of whole travelling carriages that are positioned at the cell of regulation, is used when travelling carriage 100 is measured the down link transmitted power.Notification channel 203 (BCH:Broadcast Channel; Broadcast channel) is the channel that is set in down link, can carries announcement information.Notification channel 203 plays a part to notify travelling carriages 100 with the various information that base-station control apparatus 102 is set.Notification channel 203 also is the shared channel of whole travelling carriages that is positioned at the cell of regulation.
Fig. 3 is the block diagram of composition that the travelling carriage of embodiment of the present invention 1 is shown.Among Fig. 3, control part 300 carries out the setting of channel.Protocol processes portion 301 carries out protocol processes such as the setting, release of channel.(Dedicated Physical Channel: DPCH) interpolation/deletion portion 302 carries out setting, interpolation, the deletion of DPCH to DPCH.DPCH is the mask method of the physical channel of DCH.DPCH sending part 303 carries out the processing that DPCH such as transmitting channel coding use.E-DCH interpolation/deletion portion 304 is identical with DPCH interpolation/deletion portion 302, also carries out setting, the interpolation of E-DCH, the control of deletion.E-DCH sending part 305 is identical with DPCH 303, also sends the processing that E-DCH uses.Modulation portion 306 multiple connections are also modulated the signal of DCH, E-DCH etc.Power amplification portion 307 is amplified to modulated signal the transmitted power of hope.Antenna 308 sends the wireless signal that is amplified to the regulation transmitted power, and receives the wireless signal that arrives from the base station.It more than is the composition of the transmitting system that comprises of travelling carriage.
Among Fig. 3, the faint wireless signal that low noise enlarging section 309 burden antennas 308 receive.Demodulation such as the DPCH that demodulation section 310 comprises the wireless signal of receiving, CPICH, BCH, and separated.CPICH acceptance division 311 is handled the CPICH that obtains separating in the demodulation section 310.The BCH that obtains separating in 312 pairs of demodulation sections 310 of announcement information acceptance division handles.Path loss measurement section 313 obtains the propagation loss (path loss) of down link from the incoming level of CPICH.Base station interference amount management department 314, the interference volume of the base station of reading in the management announcement information acceptance division 312.SIR control part 315, the calculating that needs during control SIR estimates.Calculating part 316 carries out the estimation of up link received signal and the calculating of SIR.Path loss management department 317, the path loss of each base station that management path loss measurement section 313 is measured.Up received power management department 318, the up received signal estimating power that obtains in the Management Calculation.SIR management department 319, the SIR that obtains in the Management Calculation.The DPH of demodulation and separation handles in 320 pairs of demodulation sections 310 of DPCH acceptance division (receiving DPDCH/DPCCH).New channel acceptance division 321 carries out the reception of new channel when the new channel that base station sets is used travelling carriage notice interference volume.Absolute grant), RG (Relative Grant: relative authorization), the channel of overload indicator (Overload Indicator) here the new channel of saying is to receive (the Absolute Grant: of AG for example.Can also utilize these channels to receive interference volume itself.The position that needs in the interference volume is measured in handling part 322 management in interference volume position.It more than is the composition of the receiving system that comprises of travelling carriage.
Fig. 4 is the block diagram that the composition of base station is shown.Among Fig. 4, control part 400 carries out the setting of channel.Protocol processes portion 401 carries out protocol processes such as the setting, release of channel.DPCH interpolation/deletion portion 402 carries out setting, interpolation, the deletion of DPCH.DPCH sending part 303 carries out the processing that DPCH such as transmitting channel coding use.Announcement information sending part 404 is identical with DPCH sending part 403, also sends the processing that BCH uses.CHICH sending part 405 is identical with DPCH sending part 403, sends the processing that CPICH uses.New channel sending part 415 sends the processing that new channel is used when setting new channel for the notice interference volume.The signal of modulation portion 406 modulation DCH, BCH, CPICH etc.Power amplification portion 407 is amplified to and wishes institute's transmitted power.Antenna 408 carries out the transmitting-receiving of wireless signal.Among the recipient, low noise amplifier 409 amplifies the faint wireless signal that antenna 408 receives.
Fig. 5 is the key diagram that the explanation travelling carriage is estimated the notion of up SIR.The method of Fig. 5 explanation travelling carriage 100 and a plurality of base station 101a, 101b carry out soft handover during, according to the interference volume of base station 101a, 101b notice and the path loss between travelling carriage 100 and base station 101a, the 101b, estimate equivalent up SIR at travelling carriage 100.Travelling carriage 100 receives the interference volume of notifying with BCH501a, 501b from base station 101a, 101b.Interference volume is because factor such as traffic carrying capacity and each base station difference in the district, so each base station notice travelling carriage.This interference volume is equivalent to I.Travelling carriage 100 is also measured the path loss of base station 101a, 101b.Among Fig. 5, the path loss 502a between travelling carriage 100 and the base station 101b is used as the reference path loss, is called same path loss distance with the distance of this reference path loss path loss that roughly degree is identical measuring.The difference of path loss 502a between path loss 502b between base station 101a and the travelling carriage 100 and base station 101b and the travelling carriage 100 (base station path loss) is path loss difference 504.Travelling carriage 100 calculating path losses and equivalent SIR (simulation SIR).
Here, path loss and interference volume are described.Fig. 6 is the key diagram of the notion of explanation path loss.Among Fig. 6, S is the receiving intensity that travelling carriage (or base station) receives, and for example is the received power from the upward signal of travelling carriage of base station is got the long-time value that obtains after average.D is the distance of travelling carriage and base station, and L is a path loss, i.e. the attenuation of the receiving intensity that produces in the communication line.To get long-time mean time in the received power of base station from the up transmission signal of travelling carriage to quick decline, as shown in Figure 6, receiving intensity S and distance decay with being directly proportional.The CPICH that sets by the calculation base station control device (Common Pilot Channel: the received power of setting power Common Pilot Channel) and the CPICH of moving table measuring poor, obtain path loss.
Fig. 7 is the key diagram of the notion of explanation interference volume (interference power).Among Fig. 7, " S " is the signal power of own (being travelling carriage 100), the S when being equivalent to calculate SIR." I " is the power that becomes the interference of this TV station, is that the total power that receives from the base station is removed the power that obtains after the signal power of this TV station." up reception allowance power " is the maximum power that the base station can receive, and the base station can not receive the power above this power." background noise " is the noises such as thermal noise of antenna." he distinguishes interference power " is the interference volume from other base station." other user's interference power " is meant the power of the travelling carriage beyond this TV station that is present in the same district.That is, disturb I be amount to background noise, he distinguishes the interference of interference power and his cell power.Travelling carriage can not be grasped the uplink interference amount, therefore notifies from the base station.Interference volume originally be amount to background noise, he distinguishes the part that is equivalent to I of interference power and his cell power, but in the present embodiment, owing to travelling carriage is notified with shared channels such as BCH, the total information of whole travelling carriages that preferably is present in same district, but not the information of travelling carriage individuality.Therefore, base station notice interference volume I adds the full received power S+I of the power of our station.If the power S of our station is so not big, the full received power S+I of base station notice can be thought of as interference power to our station.
In the present embodiment 1, notify interference volume to travelling carriage from the announcement information sending part 404 usefulness BCH of base station.Fig. 8 is the key diagram of explanation base station to the processing of travelling carriage notice interference volume.Among Fig. 8, behind the interference volume (step 800) of base station in interference volume measurement section 413 measurement zones, informing base station control device (step 802).Interference volume is meant the full received power (S+I shown in Figure 7) of the power that comprises object travelling carriage itself.Base-station control apparatus is with the interference volume informing base station (step 802) of base station notice.The base station is used as interference volume as announcement information from announcement information sending part 404 and is sent to the whole travelling carriages (step 803) that exist in the district.Travelling carriage receives BCH, reads interference volume, stores interference volume management department 314 into.
Fig. 9 is the flow chart of the processing of measuring route loss in the explanation travelling carriage.The received power S's ' of the CPICH that the setting power P ' of the CPICH that is set by base-station control apparatus and travelling carriage receive is poor, obtains path loss L.That is, use L=P '-S ', obtain path loss L (dB).Among Fig. 9, the setting power P ' that the BCH that travelling carriage receives from announcement information acceptance division 312 reads CPICH is (step 900) (dB).Set the setting power of CPICH at base-station control apparatus, and it is passed to travelling carriage by the base station.The power P that the base station is set with base-station control apparatus ' (dB) send CPICH.In the step 901, the CPICH acceptance division 311 of travelling carriage receives the CPICH that the base station sends, and the power S ' of the CPICH of measurement reception (dB).From the base station power P ' CPICH that (dB) sends decays to power S ' before platform receives being moved.Before arriving travelling carriage, the power of decaying at propagation path is path loss.In the step 902, in order to obtain path loss L, the power S ' of the CPICH of actual reception is departed from the difference of the setting power P ' of CPICH and be used as path loss L.In the step 903, travelling carriage records path loss management department 317 with the path loss L that obtains.
In the above-mentioned processing, travelling carriage is grasped the path loss obtained from the difference of the setting power of CPICH and received power and the interference volume I of base station.Below, infer the processing of the signal power from travelling carriage (upward signal received power hereinafter referred to as) that the base station receives according to path loss L with reference to Fig. 5 explanation.Travelling carriage 100 usefulness transmitted power P (dB) send.Travelling carriage 100 with path loss minimum in the path loss of path loss management department 317 record as reference path loss L0.Then, estimate to become the up reference signal received power S0 (dB) of benchmark according to the transmitted power P of reference path loss L0 and travelling carriage.The implication of up reference signal received power S0 is the signal power from travelling carriage that the base station 101b of path loss minimum measures.That is, therefore the signal power (transmitted power P) that travelling carriage 100 the sends reference path loss L0 that only decays before arriving base station 101b can be used as up reference signal received power S0 (dB) difference of transmitted power P and reference path loss L0 and obtain.Utilize above-mentioned processing to infer the upward signal benchmark received power of reference path loss L0 at base station 101b.Consider the upward signal received power S of base station 101a of upward signal received power S of base station 101a that travelling carriage 100 usefulness the upward signal benchmark received power S0 that obtains like that mentioned above infers path loss L than the upward signal benchmark received power S0 of the base station 101b part of path loss difference L-L0 that decays again, so can calculate this received power S with S=S0-(L-L0).Mentioned above like that, the whole base station measurement upward signal received powers of travelling carriage to comprising in current effective group.
Figure 10 is the flow chart that the processing of upward signal received power is estimated in explanation.Among Figure 10, the SIR control part of travelling carriage 315 select path loss management department 317 record with path loss each base station in the path loss L (step 1001) of path loss minimum.Then, calculating part 316 will deduct the power P-L0 that obtains behind the path loss L0 of base station from the transmitted power P of transmission power amplification units 307 and be used as upward signal benchmark received power S0 (step 1002).SIR control part 315 judges whether not calculate the path loss (step 1003) of upward signal received power S.If do not calculate the path loss (being "No" in the step 1003) of upward signal received power S, end process.The path loss (being "Yes" in the step 1003) of not calculating upward signal received power S is arranged, and then in step 1004, SIR control part 315 selects not calculate the path loss L of upward signal received power S.Calculating part 316 is obtained the path loss L of step 1004 selection and the difference L-L0 (step 1005) of base station path loss L0.Calculating part 316 deducts the path loss difference L-L0 that obtains the step 1005 from upward signal benchmark received power S0, obtains the upward signal received power S (step 1006) of the path loss L of selection in the base station.After carrying out above-mentioned processing, judge whether not calculate the path loss of upward signal received power S in step 1003.The processing of repeating step 1004～step 1006 is up to the path loss of not calculating upward signal received power S (being "No") in the step 1003.
Travelling carriage can be estimated to handle by carrying out upward signal received power shown in Figure 10, estimates the upward signal received power (for example S1～S3, with the situation of 3 place's base station communications) of each base station in the soft handover.Travelling carriage utilizes the signal of base station with BCH notice, grasps the interference volume (I1～I3) of each base station.((S1～S3) can calculate the SIR (SIR1～SIR3) of each base station in the soft handover for I1～I3) and upward signal received power to utilize this interference volume.The upward signal received power that processing shown in Figure 10 is estimated is only estimated the received power of each base station after all at travelling carriage, therefore the SIR that obtains according to the upward signal received power of interference volume and travelling carriage estimation only simulates.Therefore, in the following explanation, be called " equivalent SIR " or " simulation SIR ".SIR is the ratio of received power with the interference power of base station, so for example SIR1 can calculate with SIR1=S1/I1.Can obtain the simulation SIR (SIR2, SIR3) of each base station equally.
By above-mentioned explanation obtain like that each base station simulation SIR (SIR1～SIR3), travelling carriage is a benchmark with simulation SIR, mark carries out the best base station of the uplink communication quality of a plurality of base stations of soft handover to the poorest base station of communication quality successively.Thereby, even travelling carriage in that produce can not be under the situation of the link imbalance of downlink communication quality estimating uplink communication quality, also can select to be fit to set the base station of uplink communication quality the best of E-DCH.And, can mark a plurality of base stations by the order of good communication quality, therefore, also can select the good base station of uplink communication quality the 2nd even when not satisfying the communication quality of regulation with the down link of link communication base station the best in quality under the situation of mode link imbalance., can also obtain precision and be higher than the judged result of judging uplink communication quality according to TPC like that according to the communication quality of simulation SIR judgement up link by above-mentioned explanation.
Execution mode 2
In the execution mode 1, the base station is notified travelling carriage with BCH with interference volume I.Yet the channel beyond the also available BCH is with interference volume I notice travelling carriage.Below, the example of base station with the channel notification interference volume beyond the BCH is described.Absolute grant), RG (Relative Grant: relative authorization), overload etc. particularly, consider AG (Absolute Grant:.Mandate is meant the permission notice of scheduler notice travelling carriage.AG is that expression is the channel that unit sends a plurality of absolute speed with 10 milliseconds (ms), carries in E-AGCH (E-DCH Absolute Grant Channel:E-DCH absolute grant channel).RG is to be that unit sends 1 and relatively move from the absolute value of AG notice and to send the channel of point with 2 milliseconds or 10 milliseconds.In E-RGCH (E-DCH Relative Grant Channel:E-DCH relative authorization channel), carry RG.When hereinafter being recited as AG in the explanation, mean the structure of utilizing the channel id that carries AG.When being recited as RG, comprising and utilize the structure that similarly carries the channel id of RG with AG.The channel that carries the ACK/NAK of E-DCH is E-HICH (an E-DCH ACK Indicator Channel:E-DCHACK indicator channel).E-HICH be with E-RGCH be that unit sends 1 channel equally also with 2 milliseconds or 10 milliseconds, can utilize your sign indicating number of Adama to distinguish with E-RGCH.Thereby, can make E-RGCH and E-HICH multiple connection with identical channel code.
Below, the example when using AG is shown.AG can set independent identifier (ID) to travelling carriage, and it is used as receiver address.By a plurality of travelling carriages are set ID jointly, can send identical information to a plurality of travelling carriages simultaneously.This ID can also be used to the purposes of the information of distinguishing except that being used to distinguish the travelling carriage, can except that the absolute grant of original transmission, can also send the interference volume of base station etc. by identical travelling carriage being sent the AG of different I D.Figure 11 is the flow chart of the processing of the travelling carriage the when base station is described with AG notice interference volume.According to contents processing different ID is set.In the step 1100, receive the physical channel (E-AGCH) that carries AG.In the step 1101, the physical channel that receives go the mapping.In the step 1102, the code check of the physical channel that receives goes coupling.In the step 1103, the channel decoding of the physical channel that receives.Step 1104 and the execution processing corresponding thereafter with ID1～ID3.In the UEID multiplying of step 1104, take advantage of the CRC (cyclic redundancy check (CRC)) that distributes to ID.In the CRC check of step 1105, correct decoding whether after the UEID multiplying of determining step 1104 is if non-correct decoding is discarded in step 1106.Otherwise, correct decoding, then the value that will obtain in step 1107 will be exported is given interference volume position management department 322.As shown in figure 11, carry out the processing of a plurality of ID, thereby can in travelling carriage, receive different information.
Figure 12 is the key diagram of notion that the system that utilizes method of expression group ID is shown.Group ID is meant the common ID that distributes to a plurality of travelling carriages.Among Figure 12, travelling carriage 1200a～120c is the user transceiver that distributes ID=1.Base station 1201 is the base stations that become service area.The service area base station is the base station of taking on the control centre.E-AGCH 1201a～1201c sends the channel that AG uses.As shown in figure 12, travelling carriage 1200a～1200c of assign group ID=1 can both receive identical information.Figure 13 is the key diagram that the system of AG notice interference volume is used in explanation.Travelling carriage 1300 distributes ID=1, ID=2, a plurality of groups of ID such as ID=3, ID=4.Base station 1301a～1301c measures interference volume in district separately.Base station 1301a is a service area, and base station 1301b, 1301c are non-service area.After in a single day the interference volume of measuring among the 1301a～1301c of base station sends to base-station control apparatus 1303, just gathered at base-station control apparatus 1303, and the E-AGCH 1302 that uses the various information comprise ID1～ID4 from the base station 1301 notice travelling carriages 1300.Gather in the base-station control apparatus 1303 and notify the information of travelling carriage 1300 to utilize ID1～ID4 to be distinguished.Use under the situation of AG, can therefore have 1 advantage that gets final product of AG receiving system that can make UE at 1 a plurality of interference volume of channels carry.
Execution mode 3
Explanation is used for the example of base station to travelling carriage notice interference volume with RG.Among the RG, also identical with AG, travelling carriage is set independent ID.RG also can be with organizing ID.Among the RG, in order to distinguish the ID different with AG, without CRC, and be called Adama you the sign indicating number orthogonal code sequence.Do not have the CRC position among the RG, distinguish ID, so judge whether to send than AG difficulty with your sign indicating number of Adama.Therefore, RG preferably often sends.Figure 14 is the flow chart of the processing of the travelling carriage when illustrating from base station and RG notice interference volume.Set different ID according to contents processing.In the step 1400, receive the physical channel (E-RGCH) that carries RG.Among step 1401a～1401c, the Adama that sign indicating number that your sign indicating number (UEID) of the Adama of taking advantage of when being multiplied by with spread spectrum is identical, thus return to the preceding signal of spread spectrum.Among the RG, your sign indicating number of Adama is used as UEID.When taking advantage of your sign indicating number of different Adamas, uncorrelated with former sequence, it is indefinite to export.Among step 1402a～1402c, the physical channel that receives go the mapping.Among step 1403a～1403c, the channel decoding of the physical channel that receives.Among the RG, for example the TICH with R99 similarly uses (8,5) Reed-Muller sign indicating number to encode.Reed-Muller sign indicating number needn't be made the code check coupling.Among step 1404a～1404c, ID1, ID2 and ID3 can obtain the output of RG mandate, ACK/NAK and base station interference amount respectively.
By carrying out the processing of a plurality of groups of ID as shown in Figure 14, also can receive different information in the travelling carriage.The method that sends interference volume when not sending ACK/NAK is also arranged.At this moment, having when not sending ACK/NAK can be with the advantage of the E-HICH that carries ACK/NAK.And when carrying out the E-DCH transmission, travelling carriage can infer that ACK/NAK must occur.So, when ACK/NAK does not occur, distinguish that E-HICH carries interference volume.Therefore, can switch in the timing that ACK/NAK occurs.When carrying the channel of interference volume, RG, interference volume, ACK/NAK need your sign indicating number of Adama respectively with E-RGCH, but send under the situation of interference volume when not sending ACK/NAK, have RG and the two advantage of distributing your sign indicating number of Adama to get final product respectively of E-HICH.Among the RG, identical with AG, also can send information by use group ID.
Figure 15 is the key diagram of explanation with the system of RG notice interference volume.Among Figure 15, travelling carriage 1500 distributes ID=1, ID=2, ID=3, ID=4, ID=5, ID=6.Base station 1501 is base stations of measuring interference volume, uses E-RGCH (RG) 1502 to send the information of expression interference volume.Base station 1501a is a service area, and other base station is a non-service area.Utilize ID to distinguish each information.The base station of 2101a service area can replace 2102E-RGCH with E-AGCH.When utilizing E-RGCH, it is 1 prerequisite in 2 milliseconds that RG is arranged, and for example waits for 10 milliseconds and be unit notice interference volume with 5.Figure 16 is the processing of interference volume is measured in explanation with E-RGCH a flow chart.In the step 1600, with interference volume position handling part 322 initialization of keeping interference volume position, the preparation of newly measuring interference volume.In the step 1601, receive the RG of the position of carrying interference volume.In the step 1602, the interference volume position that receives is taken care of at interference volume position handling part 322.Then, in step 1603, judge whether to receive the position that is enough to do the interference volume measurement.If receive the quantity (being "Yes" in the step 1603) that needs, execution in step 1604.(be "No" in the step 1603) when receiving, then repeating step 1601 and subsequent processing.In the step 1604,, obtain interference volume with the position decoding of interference volume position handling part 322 keepings.When above-mentioned explanation is used RG like that, compare during with use AG, can directly not notify travelling carriage, so can send fast with the short time by base-station control apparatus.
Execution mode 4
Explanation is used for the example of base station to travelling carriage notice interference volume with overload indicator (Overload Indicator is also referred to as and shows busy position (busy bit)).Overload indicator is the many or few information of the interference volume of indicated object base station, uses 1.When set up this position, the travelling carriage restriction sent E-DCH.For example interference volume for a long time, Overload=1.Consider for example equally, also carry overload indicator at E-RGCH with RG.At this moment, same with RG, also can be with deciphering as Figure 14.Also can consider without E-RGCH, and divert shared channel.
Below, the example when being illustrated in shared channel and carrying overload indicator.1 base station has 1 overload indicator just passable, therefore can divert existing pilot channel (PICH).Especially can carry overload indicator in spare bits.Figure 17 is the key diagram that the structure of the pilot channel that carries overload indicator is shown.Among Figure 17, the figure place in 1 frame of the position 1700 expression pilot channels in 1 frame is decided to be 300 among the R99.Position 1701 in the use is positions of the part used among the R99, is decided to be 288 among the R99.Overload1702 is the position of using in the overload indicator, is 1.This part is untapped position among the R99.Untapped position 1703 is all untapped positions among R99 and the Release 6, is 11.
Then, the method that sends overload indicator with a plurality of is described.Therefore mistake only takes place with 1 to send as the not shielded mode of physical layer in pilot channel easily.Thereby, the sending method of the overload indicator when utilizing multidigit Overload is described.For fear of the influence of mistake, be preferably in and be averaged after travelling carriage side receives a plurality of positions.At this moment preferably not everybody who receives to be taken as 2 advance value and judge firmly, but, carry out soft judgement having a plurality of many-valued continuous integrals.Can realize continuous integral by in the configuration of the position that means overload, making the position continuously.As with the high method of existing mode interchangeability, can consider that the designator of existing pilot channel changes the information that means overload that is read as.At this moment, should read the cycle parameter of the timing of pilot channel by changing decision, and read 2 pilot channels, distinguish the designator that existing paging uses and the designator of overload usefulness.
Then, the method that sends interference volume with the spare bits of pilot channel is described.Method as the resolution that improves notice has and divides equally whole 12 methods.Yet, when the reception mistake of high-end position takes place, cause the malfunction that travelling carriage interference volume mistake causes probably.Thereby, can carry out error correction by utilizing Reed-Muller (Reed-Muller) sign indicating number to wait.For example, a plurality of interference volume notice (is referred to as Cell load indicator: district's load designator), be taken as 4 for example will distinguish load designator, when distributing to 12 spare bits, can utilize (12,4) yard sometimes.
Figure 18 is the key diagram of explanation with the system of overload indicator notice interference volume.Travelling carriage 1800 distributes ID=1.Base station 1801a～1801c is the base station of measuring interference volume, according to interference volume what, overload indicator (Overload) output 1 or 0.The value of Overload is sent to travelling carriage 1800.Figure 19 is that explanation operating overload designator is measured the flow chart of the processing of interference volume.In the step 1900, with interference volume position management department 322 initialization of management interference volume position, the preparation of newly measuring interference volume.In the step 1901, receive the RG that carries overload indicator.In the step 1902, the overload indicator that receives is taken care of at interference volume position handling part 322.In the step 1903, judge whether travelling carriage is to measure interference volume to receive enough overload indicator (showing busy position).If receive the quantity that needs, execution in step 1904; Receive the quantity that needs, then repeating step 1901 and subsequent processing.In the step 1904,, calculate mean value, thereby calculate interference volume in the interference volume position handling part storage position during 10 milliseconds for example.
Industrial practicality
The invention particularly relates to the travelling carriage for the GSM that adopts the W-CDMA mode to consist of.
Claims (1)
1. base station is used for sending under the situation of Radio Resource of data to described travelling carriage having notified to travelling carriage, and described base station uses notified described Radio Resource to send described data to described travelling carriage, it is characterized in that,
Use is used for discerning respectively the distinguished symbol of a plurality of processing relevant with the communication of described data, notifies described Radio Resource to described travelling carriage, and what make that described travelling carriage can differentiate use is any distinguished symbol.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103959182A (en) * | 2011-11-30 | 2014-07-30 | 三菱电机株式会社 | Control system, control device, connecting line, and drive device |
| CN109565730A (en) * | 2016-08-19 | 2019-04-02 | 瑞典爱立信有限公司 | Mobile management based on uplink measurement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103959182A (en) * | 2011-11-30 | 2014-07-30 | 三菱电机株式会社 | Control system, control device, connecting line, and drive device |
| CN103959182B (en) * | 2011-11-30 | 2017-03-15 | 三菱电机株式会社 | Control system, control device, connecting line and driving means |
| CN109565730A (en) * | 2016-08-19 | 2019-04-02 | 瑞典爱立信有限公司 | Mobile management based on uplink measurement |
| CN109565730B (en) * | 2016-08-19 | 2021-05-25 | 瑞典爱立信有限公司 | Mobility management based on uplink measurements |
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