CN102316481B - Neighborhood path loss mapping method and device - Google Patents

Neighborhood path loss mapping method and device Download PDF

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Publication number
CN102316481B
CN102316481B CN201010227032.7A CN201010227032A CN102316481B CN 102316481 B CN102316481 B CN 102316481B CN 201010227032 A CN201010227032 A CN 201010227032A CN 102316481 B CN102316481 B CN 102316481B
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rsrp
terminal
phr
timer
path loss
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CN102316481A (en
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路陈红
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2011/072952 priority patent/WO2012000340A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a neighborhood path loss mapping method and a neighborhood path loss mapping device, which are applied to a time division duplex-long-term evolution (TDD-LTE) system. The method comprises the following steps of: setting a reference signal received power (RSRP) triggering parameter and a power headroom report (PHR) triggering parameter for a terminal by using a base station; classifying the terminal according to the RSRP and/or PHR reporting opportunity of the terminal; and mapping the neighborhood path loss of the terminal according to a classification result, stored local RSRP, neighborhood RSRP, neighborhood PHR and a measured terminal receiving power value. In the method and the device, the terminal is classified according to each piece of power information, reported by the terminal, about path loss and updating time, and the neighborhood path loss of the terminal is estimated according to the classification result, so the aim of learning neighborhood path loss information by the base station is fulfilled, and TDD-LTE interference limiting uplink power control further can be realized.

Description

The method of neighborhood path loss mapping and device
Technical field
The present invention relates to the communications field, relate in particular to one and be applied to method and the device of the neighborhood path loss mapping of time division duplex-Long Term Evolution (Time Division Duplex-Long-Term Evolution, referred to as TDD-LTE).
Background technology
Power control is that communication system realizes that resource is distributed and one of the key technology of interference management.In mobile communication system, uplink power control is called again power of reverse link control, effectively ascending power control method can meet under the prerequisite of user communication quality requirement, reduce the transmitting power of user terminal, reduce the interference between each terminal, extend the stand-by time of terminal, increase the capacity of communication system.
In existing mobile communication system, the method for control terminal transmitting power generally has two kinds: the one, and in control service area, each user terminal is to the received power of serving BS; The 2nd, in control service area, each user terminal is to the interference power of adjacent area.First method is to promote received signal to noise ratio by raising received power, to promoting terminal throughput.But, if each base station all adopts this kind of control thinking in network, in promoting terminal received power, also can promote the adjacent area interference that terminal is subject to, receive Signal to Interference plus Noise Ratio gain thereby cannot obtain, cause the transmitting power that terminals consume is larger but to can not get throughput hoisting, even can because of Interference Estimation forbidden cause throughput decline.Second method is to determine that terminal allows the maximum power of transmitting at control terminal on to the basis of adjacent area interference level, and determines the power of terminal according to power headroom.The method in network each base station all control terminal can realize the restriction of disturbing from the adjacent area of experiencing in to the interference of adjacent area, thereby can estimate more exactly to receive Signal to Interference plus Noise Ratio, prediction transmission rate, promotes terminal throughput.Certainly, the method will realize the interference of control terminal to adjacent area, need to obtain the path loss information of terminal to adjacent area.
At present, 3GPP (3rd Generation Partnership Project, third generation partner program) 25 serial protocols of tissue support in TD-SCDMA (TimeDivision-Synchronous Code Division Multiple Acsess, TD SDMA) systems that terminal is to reporting neighboring cell, base station path loss information.But, in 36 serial protocols, do not support in LTE system terminal to reporting neighboring cell, base station path loss information, thereby cannot realize interference-limited uplink power control.
Realizing in process of the present invention, inventor recognizes that prior art exists following defect: in TDD-LTE system, neighborhood path loss can not be known in base station.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method and device of neighborhood path loss mapping, above-mentioned in TDD-LTE system to solve, the problem of neighborhood path loss can not be known in base station.
According to an aspect of the present invention, a kind of method of neighborhood path loss mapping is provided, be applied to time division duplex-Long Term Evolution TDD-LTE system, comprise: base station is that terminal arranges Reference Signal Received Power RSRP trigger parameter and power headroom reporting (PHR) PHR trigger parameter, for monitoring path loss information; According to the opportunity of terminal to report RSRP and/or PHR, terminal is classified; According to the result of classification, the local area RSRP of storage, adjacent area RSRP, PHR, and the performance number of the above-mentioned terminal of reception of measuring, the neighborhood path loss of mapping terminal.
In the technical program, base station is that terminal arranges RSRP trigger parameter and specifically comprises: base station is that terminal arranges RSRP difference power threshold parameter, in the time that the local area RSRP of terminal is less than difference power threshold parameter with the strongest adjacent area RSRP difference power, terminal reports local area RSRP, adjacent area RSRP to base station; With
Base station is that terminal arranges PHR trigger parameter and specifically comprises: base station is that terminal arranges report cycle and/or descending path loss change amount, when terminal meets report cycle and/or descending path loss change amount, terminal reports PHR to base station, and the performance number of receiving terminal is measured in base station in receiving the PHR of terminal to report.
In the technical program, according to the local area RSRP of terminal to report, adjacent area RSRP, upgrade the local area RSRP, the adjacent area RSRP that have stored; According to the PHR of terminal to report, upgrade the PHR having stored; According to the performance number of the receiving terminal of measuring, upgrade this terminal power value of reception of having stored.
Preferably, in the technical program, according to the opportunity of the RSRP of terminal to report and PHR, the step that terminal is classified specifically comprises: base station initialization RSRP timer, PHR timer; Whether base station, according to the first predetermined period, receives the RSRP of terminal to report and the state of RSRP timer according to current time, upgrades RSRP timer; Whether base station, according to the second predetermined period, receives the PHR of terminal to report and the state of PHR timer according to current time, upgrades PHR timer; According to the state of RSRP timer and PHR timer, terminal is classified.
Preferably, in the technical program, the first predetermined period and the second predetermined period equate, are Transmission Time Interval TTI.
Preferably, in the technical program, RSRP timer is set and specifically comprises: Initial R SRP timer T rSRP=-1, initial p HR timer T pHR=-1; Whether base station, in each the first predetermined period, receives the RSRP of terminal to report and the state of RSRP timer according to current time, upgrades RSRP timer and specifically comprises: if when current time receives local area RSRP, the adjacent area RSRP of terminal to report, and T rSRP=0; T else if rSRP>=0 o'clock, T rSRP=T rSRP+ 1; Whether base station, in each the second predetermined period, receives the PHR of terminal to report and the state of PHR timer according to current time, upgrades PHR timer and specifically comprises: if current time receives the PHR of terminal to report, T pHR=0; T else if pHR>=0, T pHR=T pHR+ 1; According to the state of RSRP timer and PHR timer, terminal is classified and specifically comprised: if T pHR< 0, marking terminal is initial classes terminal; T else if rSRP=0, marking terminal is critical edges Terminal Type; T else if pHR=0andT rSRP> 0, marking terminal is edge Terminal Type; T else if pHR=0andT rSPR< 0, Terminal Type centered by marking terminal; Otherwise marking terminal is Stabilized terminal.
Preferably, in the technical program, in each the first predetermined period, whether receive the RSRP of terminal to report and the state of RSRP timer according to current time, upgrading RSRP timer also comprises: in the time receiving the adjacent area RSRP of terminal to report and be A3-2 Event triggered result, base station is that terminal starts interim timer T temp=0; Each TTI adds 1 afterwards, when interim timer is greater than default T thtime, put T rSRP=-1, P rSRP_s=0, P rSRP_b=0, close interim timer, default T thspan is 1-2s; In interim timer timing course, if receive adjacent area RSRP of terminal to report, close this timer, until terminal has the RSRP of A3-2 Event triggered to report, more again for terminal starts interim timer.
Preferably, in the technical program, according to the result of classification, the local area RSRP of storage, adjacent area RSRP, PHR, and measure the received power value obtaining, the neighborhood path loss of mapping terminal specifically comprises: if terminal is initial classes terminal, do not calculate neighborhood path loss; Terminal is critical edges Terminal Type, PL else if b=P rSRP_b-P rS; Terminal is edge Terminal Type else if, Δ P1=P c_max-P pHR-P r, Δ P2=P rSRP_s-P rS, Δ P3=P rSRP_b-P rS_b, PL b=Δ P3+ Δ P2-Δ P1; Terminal is center Terminal Type else if, Δ P1=P c_max-P pHR-P r, PL b=Δ P1+n × Thr_p; Otherwise PL b=PL b, wherein, PL bfor neighborhood path loss estimated value, P rSRP_bfor the RSRP of adjacent area, P rSfor serving BS reference signal transmitting power, P c_maxfor terminal maximum transmission power, P pHRfor the power of PHR; P rfor received power value; P rSRP_sfor local area RSRP; P rS_bfor neighbor base station reference signal transmitting power, if not mutual reference signal transmitting power between base station makes P rS_balso be serving BS reference signal transmitting power, Thr_p triggers the difference power thresholding that RSRP reports, n ∈ [1,6], and n is relevant to the local area path loss of terminal, and the larger n value of local area path loss is less.
According to a further aspect in the invention, provide a kind of device of neighborhood path loss mapping, be applied to TDD-LTE system, be positioned at base station, having comprised: initialization module, has been used to terminal that RSRP trigger parameter and PHR trigger parameter are set, for monitoring path loss information; Sort module, for according to the opportunity of terminal to report RSRP and/or PHR, classifies to terminal; Mapping block, for according to the result of classification, local area RSRP, the adjacent area RSRP of storage, PHR, and the performance number of the above-mentioned terminal of reception of measuring, the neighborhood path loss of mapping terminal.
In the technical program, initialization module comprises: RSRP initialization submodule, be used to terminal that RSRP difference power threshold parameter is set, in the time that local area RSRP and the strongest adjacent area RSRP difference power of terminal are less than difference power threshold parameter, terminal reports local area RSRP, adjacent area RSRP to base station; PHR initialization submodule, is used to terminal that report cycle and/or descending path loss change amount are set, and in the time that terminal meets report cycle and/or descending path loss change amount, terminal reports PHR to base station; Received power value module, for measuring the performance number of receiving terminal in receiving the PHR of terminal to report.
Preferably, in the technical program, sort module specifically comprises that timer initialization submodule, RSRP timing submodule, PHR timing submodule and state arrange submodule, wherein: and timer initialization submodule, for the initial condition of RSRP timer and PHR timer is set; Whether RSRP timing submodule, for according to the first predetermined period, receive the RSRP of terminal to report and the state of RSRP timer according to current time, upgrades RSRP timer; Whether PHR timing submodule, for according to the second predetermined period, receive the PHR of terminal to report and the state of PHR timer according to current time, upgrades PHR timer; State arranges submodule, for according to the state of RSRP timer and PHR timer, terminal is classified.
Preferably, in the technical program, the first predetermined period and the second predetermined period equate, are TTI:RSRP timing submodule, for Initial R SRP timer T rSRP=-1, if when current time receives local area RSRP, the adjacent area RSRP of terminal to report, T rSRP=0; T else if rSRP>=0 o'clock, T rSRP=T rSRP+ 1; PHR timer submodule, for initial p HR timer T pHR=-1, if current time receives the PHR of terminal to report, T pHR=0; T else if pHR>=0, T pHR=T pHR+ 1; State arranges submodule, if for T pHR< 0, marking terminal is initial classes terminal; T else if rSRP=0, marking terminal is critical edges Terminal Type; T else if pHR=0andT rSRP> 0, marking terminal is edge Terminal Type; T else if pHR=0andT rSRP< 0, Terminal Type centered by marking terminal; Otherwise marking terminal is Stabilized terminal.
Preferably, in the technical program, in the time receiving the adjacent area RSRP of terminal to report and be A3-2 Event triggered result, also comprise interim timing submodule, interim timing submodule, for the interim timer T of initialization temp=0, each TTI adds 1 afterwards, when interim timer is greater than default T thtime, T rSRP=-1, P rSRP_s=0, P rSRP_b=0, close interim timer, default T thspan is 1-2s; In interim timer timing course, if receive adjacent area RSRP of terminal to report, close interim timer, until terminal has the RSRP of A3-2 Event triggered to report, more again for terminal starts interim timer.
Preferably, in the technical program, mapping block, for being initial classes terminal for terminal, does not calculate neighborhood path loss; Terminal is critical edges Terminal Type, PL else if b=P rSRP_b-P rS; Terminal is edge Terminal Type else if, Δ P1=P c_max-P pHR-P r, Δ P2=P rSRP_s-P rS, Δ P3=P rSRP_b-P rS_b, PL b=Δ P3+ Δ P2-Δ P1; Terminal is center Terminal Type else if, Δ P1=P c_max-P pHR-P r, PL b=Δ P1+n × Thr_p; Otherwise PL b=PL b,
Wherein, PL bfor neighborhood path loss estimated value, P rSRP_bfor the RSRP of adjacent area, P rSfor serving BS reference signal transmitting power, P c_maxfor terminal maximum transmission power, P pHRfor the power of PHR; P rfor received power value; P rSRP_sfor local area RSRP; P rS_bfor neighbor base station reference signal transmitting power, if not mutual reference signal transmitting power between base station makes P rS_balso be serving BS reference signal transmitting power, Thr_p triggers the difference power thresholding that RSRP reports, n ∈ [1,6], and n is relevant to the local area path loss of terminal, and the larger n value of local area path loss is less.
The inventive method has proposed a kind of method and device of neighborhood path loss mapping of the TDD-LTE of being applied to system, in the method, opportunity terminal is classified according to the renewal with neighborhood path loss related power information of terminal to report, and according to the power information mapping terminal neighborhood path loss of classifying and report, thereby solve in TDD-LTE system, the problem of neighborhood path loss can not be known in base station, has reached base station and know the object of neighborhood path loss information.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the inventive method embodiment mono-neighborhood path loss mapping method;
Fig. 2 is the flow chart of the inventive method embodiment bis-neighborhood path loss mapping methods;
Fig. 3 is the schematic diagram of apparatus of the present invention embodiment mono-neighborhood path loss mapping device.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.
Embodiment of the method one:
Fig. 1 is the flow chart of the inventive method embodiment mono-neighborhood path loss mapping method.As shown in Figure 1, the present embodiment comprises:
Step S102, base station is that terminal arranges Reference Signal Received Power (Reference SignalReceived Power, be called for short RSRP) trigger parameter and power headroom reporting (PHR) (PowerHeadroom Report, be called for short PHR) trigger parameter, for monitoring the variation of path loss information, wherein, RSRP and PHR all can reflect path loss information;
Step S104, according to the opportunity of terminal to report RSRP and/or PHR, classifies to terminal;
Step S106, according to the result of classification, the local area RSRP of storage, adjacent area RSRP, PHR, and the performance number of the above-mentioned terminal of reception of measuring, the neighborhood path loss of mapping terminal.
In the present embodiment, receive the opportunity of terminal to report RSRP and/or PHR, specifically comprise: terminal has just reported RSRP and/or PHR, terminal never reports RSRP and/or PHR, apart from last time terminal to report RSRP and/or PHR for some time.By the judgement on the opportunity to terminal to report RSRP and/or PHR, can understand the current residing state of terminal, thereby can classify to terminal.
In the present embodiment, according to the each power information relevant to path loss of terminal to report, as RSRP and/or PHR, opportunity terminal is classified, and according to the classification results power information relevant with path loss, estimate the path loss information of terminal, reach base station and known the object of neighborhood path loss.
Embodiment of the method two:
Fig. 2 is the flow chart of the inventive method embodiment bis-neighborhood path loss mapping methods.As shown in Figure 2, the present embodiment comprises:
Step S202, base station is that terminal arranges RSRP trigger parameter and PHR trigger parameter; RSRP timer is set, PHR timer;
Whether step S204, at each Transmission Time Interval (Transmission Time Interval, referred to as TTI), receive the RSRP of terminal to report and the state of RSRP timer according to current time, upgrades RSRP timer;
Whether step S206, at each TTI, receive the PHR of terminal to report and the state of PHR timer according to current time, upgrades PHR timer;
Step S208, according to the local area RSRP of terminal to report, adjacent area RSRP, upgrades the local area RSRP, the adjacent area RSRP that have stored; According to the PHR of terminal to report, upgrade the PHR having stored; In receiving the PHR of terminal to report, measure the performance number of receiving terminal, upgrade the performance number of the above-mentioned terminal of reception of having stored according to the performance number of the above-mentioned terminal of reception of measuring;
Step S210, according to the state of RSRP timer and PHR timer, classifies to terminal;
Step S212, according to the result of classification, the local area RSRP of storage, adjacent area RSRP, PHR, and measure the received power value obtaining, the neighborhood path loss of estimation terminal.
In the present embodiment, adopt the state that all upgrades RSRP timer and PHR timer at each TTI, to reach the object of accurate estimation path loss information, in the middle of practical application, also can be respectively RSRP timer and PHR timer setting cycle, to reach two timers according to the more object of new state of predetermined period.
Because LTE system up-downgoing frequency band is identical, thereby can utilize the up path loss of descending path loss equivalence of terminal.In the present embodiment, according to each power information and the update time relevant to path loss of terminal to report terminal being classified, and estimate terminal neighborhood path loss according to classification results, reach base station and known the object of neighborhood path loss information, and then can realize the interference-limited uplink power control of TDD-LTE.
Embodiment of the method three:
The present embodiment, by the basis at embodiment bis-, further illustrates neighborhood path loss mapping method.The present embodiment comprises:
Step S302, parameter configuration and buffer memory initialization.Base station triggers the difference power threshold parameter that RSRP reports to each terminal configuration.Trigger the relevant parameter that PHR reports, relevant parameter can be report cycle and descending path loss change amount.Meanwhile, base station is path loss related power information cache of each terminal initialization, for preserving local area RSRP, adjacent area RSRP, PHR value, the received power value of terminal to report.In addition, base station arranges the RSRP timer that obtains adjacent area RSRP information and the PHR timer that obtains PHR information.
Step S304, whether each TTI, receive the RSRP of terminal to report and the state of RSRP timer according to current time, upgrades RSRP timer; Whether each TTI, receive the PHR of terminal to report and the state of PHR timer according to current time, upgrades PHR timer;
Step S306, safeguards each terminal path loss related power information cache.Base station is upgraded the power information amount in each terminal path loss related power information cache to each terminal according to the power information of the each terminal to report of current time and the received power of measurement.
Step S308, classifies to each terminal.Classify to terminal according to the value of two timers in each terminal current circuit loss related power information cache in each uplink scheduling subframe in base station.Base station mainly can be classified as terminal five classes: PHR timer is less than zero, is designated initial classes terminal; RSRP timer is zero, is designated critical edges Terminal Type; RSRP timer is greater than zero, and PHR timer is zero, is designated edge Terminal Type; It is zero that RSRP timer is less than zero, PHR timer, is designated center Terminal Type; RSRP timer be less than zero and PHR timer be greater than zero, or RSRP timer and PHR timer be all greater than zero, is designated Stabilized terminal.
Step S310, calculates each terminal neighborhood path loss.Base station adopts diverse ways to calculate the neighborhood path loss of each terminal according to the power information amount in classification results and the buffer memory of each terminal.For initial classes terminal, because it is in random access procedure, do not carry out interference-limited power control, thereby do not calculate neighborhood path loss; For critical edges Terminal Type, neighborhood path loss is the poor of adjacent area RSRP and RS (Reference signal, reference signal) transmitting power; For edge Terminal Type, first computing terminal maximum transmission power deducts PHR and deducts the poor DeltaP1 of received power, calculate again the poor DeltaP2 of local area RSRP and RS transmitting power, then calculate the poor DeltaP3 of adjacent area RSRP and RS transmitting power, neighborhood path loss is DeltaP3+DeltaP2-DeltaP1; For center Terminal Type, first computing terminal maximum transmission power deducts PHR and deducts the poor DeltaP1 of received power, and neighborhood path loss is that DeltaP1 adds the difference power thresholding that n triggering RSRP doubly reports, and wherein n value obtains according to DeltaP1; For Stabilized terminal, keep the last neighborhood path loss calculating constant.
The present embodiment can be applied in TDD-LTE system, the relevant power information of all and path loss of utilizing terminal to report is estimated the path loss of terminal to adjacent area, to reporting the terminal of the power information deficiency relevant with path loss, that further utilizes base station configuration reports trigger condition power threshold parameter Estimation terminal neighborhood path loss.
Embodiment of the method four:
In the present embodiment, according to each power information and the update time relevant to path loss of terminal to report, distinguishing terminal type, thus estimate terminal neighborhood path loss for dissimilar termination property.The present embodiment comprises:
Step S402: parameter configuration and buffer memory initialization
The difference power threshold parameter Thr_p that base station reports to each terminal configuration triggering RSRP (Reference Signal Received Power), the relevant parameter that triggering PHR reports, so that the required parameter such as local area RSRP, adjacent area RSRP and PHR of terminal energy reporting base station.
Initialization local area RSRP is P rSRP_s=0, adjacent area RSRP is P rSRP_b=0, PHR value is P pHR=0 received power value is P r=0; RSRP timer is T rSRP=-1, PHR timer is T pHR=-1.
Step S404: maintenance terminal path loss related power information cache, and Updating time
Base station is at each TTI, whether each terminal is received to it according to current time and report power information and timer current state to upgrade two timers, and in the power information amount receiving in its power information moment renewal path loss related power information cache reporting.T rSRPduration timer and RSRP information updating method are as follows:
The adjacent area RSRP that If current time receives terminal reports
T RSRP＝0
Upgrade P according to reporting information by terminal rSRP_s, P rSRP_b
The adjacent area RSRP that Elseif current time does not receive terminal reports and T rSRP>=0
T RSRP＝T RSRP+1
End
In addition, the adjacent area RSRP that receives terminal to report when base station is that A3-2 event (leaving the RSRP event that reports that triggers) triggers result, for this terminal starts an interim timer T temp=0, and after each TTI add 1, when this interim timer is greater than T thtime, put T rSRP=-1, P rSRP_s=0, P rSRP_b=0, close interim timer, T thspan is 1-2s.In interim timer timing course, once receive the adjacent area RSRP of this terminal to report, close this timer, until this terminal has the RSRP of A3-2 Event triggered to report again again for this terminal starts this interim timer.
T pHRduration timer and PHR and received power information updating method are as follows:
The PHR that If current time receives terminal reports
T PHR＝0
Upgrade P according to reporting information by terminal pHR
Upgrade P according to the corresponding moment metrical information in base station r
The PHR that Elseif current time does not receive terminal reports, and T pHR>=0
T PHR＝T PHR+1
End
Step S408: each terminal is classified
Classify to terminal according to the value of two duration timers in each terminal current circuit loss related power information cache in each uplink scheduling subframe in base station.Its assorting process is as follows:
If T pHR{ terminal never reported PHR} to < 0
Be designated initial classes terminal;
Elseif T rSRP=0 { terminal to report is crossed PHR, and current time has just reported RSRP}
Be designated critical edges Terminal Type;
Elseif T pHR=0andT rSRP{ terminal had just reported PHR to > 0, also reported RSRP}
Be designated edge Terminal Type;
Elseif T pHR=0and T rSRP{ terminal had just reported PHR to < 0, but never reported RSRP}
Be designated center Terminal Type;
Else { other situations }
Be designated Stabilized terminal
End
Step S410: calculate each terminal neighborhood path loss
Base station adopts diverse ways to calculate the neighborhood path loss PL of each terminal according to the power information amount in classification results and the buffer memory of each terminal b.
If terminal is initial classes terminal
Do not calculate neighborhood path loss;
Elseif terminal is critical edges Terminal Type
PL b＝P RSRP_b-P RS_b；
Elseif terminal is edge Terminal Type
ΔP1＝P c_max-P PHR-P R
ΔP2＝P RSRP_s-P RS
ΔP3＝P RSRP_b-P RS_b
PL b＝ΔP3+ΔP2-ΔP1
Elseif terminal is center Terminal Type
ΔP1＝P c_max-P PHR-P R
PL b＝ΔP1+n×Thr_p
Else
PL b＝PL b
End
Wherein, PL bfor neighborhood path loss estimated value, P rSRP_bfor the RSRP of adjacent area, P rSfor serving BS reference signal transmitting power, P c_maxfor terminal maximum transmission power, P pHRfor the power of PHR; P rfor received power value; P rSRP_sfor local area RSRP; P rS_bfor neighbor base station reference signal transmitting power, if not mutual reference signal transmitting power between base station makes P rS_balso be serving BS reference signal transmitting power, Thr_p triggers the difference power thresholding that RSRP reports, n ∈ [1,6], and n is relevant to the local area path loss of terminal, and the larger n value of local area path loss is less.
The present embodiment is the concrete application of embodiment mono-, two, and has whole beneficial effects of above-described embodiment, no longer repeats herein.
Device embodiment mono-:
Fig. 3 is the schematic diagram of apparatus of the present invention embodiment mono-neighborhood path loss mapping device.The present embodiment discloses a kind of LTE system neighborhood path loss mapping device, is positioned at base station.The present embodiment comprises: initialization module 302, and be used to terminal that RSRP trigger parameter and PHR trigger parameter are set, for monitoring path loss information, measure the performance number that receives described terminal; Sort module 304, is connected with initialization module 302, for according to the opportunity of terminal to report RSRP and/or PHR, terminal is classified; Mapping block 306, is connected with sort module 304, for according to the result of classification, and local area RSRP, the adjacent area RSRP of storage, PHR, and the performance number of the above-mentioned terminal of reception of measuring, the neighborhood path loss of mapping terminal.
The method that the present embodiment is realized can reference method embodiment mono-related description, and there are whole beneficial effects of embodiment of the method, no longer repeat herein.
Device embodiment bis-:
The present embodiment, by the basis of embodiment, is described further neighborhood path loss mapping device.
In the present embodiment, initialization module comprises: RSRP initialization submodule, be used for arranging RSRP difference power threshold parameter, in the time that local area RSRP and the strongest adjacent area RSRP difference power of terminal are less than difference power threshold parameter, terminal reports local area RSRP, adjacent area RSRP to base station; PHR initialization submodule, for report cycle and/or descending path loss change amount are set, in the time that terminal meets report cycle and/or descending path loss change amount, terminal reports PHR to base station; Received power value submodule, for measuring the performance number that receives described terminal in receiving the PHR of described terminal to report.
In the present embodiment, sort module specifically comprises that RSRP timing submodule, PHR timing submodule and state arrange submodule.Wherein: RSRP timing submodule, for the initial condition of RSRP timer is set, and according to the first predetermined period, whether receive the RSRP of terminal to report and the state of current RSRP timer according to current time, upgrade RSRP timer; Whether PHR timing submodule, for the initial condition of PHR timer is set, and according to the second predetermined period, receive the PHR of terminal to report and the state of current PHR timer according to current time, upgrades PHR timer; State arranges submodule, is connected with RSRP timing submodule, PHR timing submodule, for according to the state of RSRP timer and PHR timer, terminal is classified.
In the present embodiment, the first predetermined period and the second predetermined period equate, are TTI.RSRP timing submodule, for Initial R SRP timer T rSRP=-1, if when current time receives local area RSRP, the adjacent area RSRP of terminal to report, T rSRP=0; T else if rSRP>=0 o'clock, T rSRP=T rSRP+ 1; PHR timer submodule, for initial p HR timer T pHR=-1, if current time receives the PHR of terminal to report, T pHR=0; T else if pHR>=0, T pHR=T pHR+ 1; State arranges submodule, if for T pHR< 0, marking terminal is initial classes terminal; T else if rSRP=0, marking terminal is critical edges Terminal Type; T else if pHR=0andT rSRP> 0, marking terminal is edge Terminal Type; T else if pHR=0andT rSRP< 0, Terminal Type centered by marking terminal; Otherwise marking terminal is Stabilized terminal.
In the present embodiment, in the time receiving the adjacent area RSRP of terminal to report and be A3-2 Event triggered result, also comprise interim timing submodule, interim timing submodule, for the interim timer T of initialization temp=0, each TTI adds 1 afterwards, when interim timer is greater than default T thtime, T rSRP=-1, P rSRP_s=0, P rSRP_b=0, close interim timer, default T thspan is 1-2s; In interim timer timing course, if receive adjacent area RSRP of terminal to report, close interim timer, until terminal has the RSRP of A3-2 Event triggered to report, more again for terminal starts interim timer.
In the present embodiment, mapping block, for being initial classes terminal for terminal, does not calculate neighborhood path loss; Terminal is critical edges Terminal Type, PL else if b=P rSRP_b-P rS; Terminal is edge Terminal Type else if, Δ P1=P c_max-P pHR-P r, Δ P2=P rSRP_s-P rS, Δ P3=P rSRP_b-P rS_b, PL b=Δ P3+ Δ P2-Δ P1; Terminal is center Terminal Type else if, Δ P1=P c_max-P pHR-P r, PL b=Δ P1+n × Thr_p; Otherwise PL b=PL b, wherein, PL bfor neighborhood path loss estimated value, P rSRP_bfor the RSRP of adjacent area, P rSfor serving BS reference signal transmitting power, P c_maxfor terminal maximum transmission power, P pHRfor the power of PHR; P rfor received power value; P rSRP_sfor local area RSRP; P rS_bfor neighbor base station reference signal transmitting power, if not mutual reference signal transmitting power between base station makes P rS_balso be serving BS reference signal transmitting power, Thr_p triggers the difference power thresholding that RSRP reports, n ∈ [1,6], and n is relevant to the local area path loss of terminal, and the larger n value of local area path loss is less.
The method that the present embodiment is realized can reference method embodiment mono-to three related description, and there are whole beneficial effects of above-described embodiment, no longer repeat herein.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
These are only the preferred embodiments of the present invention, and cannot be used for limiting the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (14)

1. a method for neighborhood path loss mapping, is applied to time division duplex-Long Term Evolution TDD-LTE system, it is characterized in that, comprising:
Base station is that terminal arranges Reference Signal Received Power RSRP trigger parameter and power headroom reporting (PHR) PHR trigger parameter;
According to the opportunity of described terminal to report RSRP and/or PHR, terminal is classified;
According to the result of described classification, the local area RSRP of storage, adjacent area RSRP, PHR, and the performance number of the described terminal of reception of measuring, shine upon the neighborhood path loss of described terminal.
2. method according to claim 1, is characterized in that:
Described base station is that terminal arranges RSRP trigger parameter and specifically comprises: described base station is that described terminal arranges RSRP difference power threshold parameter, in the time that the local area RSRP of described terminal is less than described difference power threshold parameter with the strongest adjacent area RSRP difference power, described terminal reports local area RSRP, adjacent area RSRP to described base station; With
Described base station is that terminal arranges PHR trigger parameter and specifically comprises: described base station is that described terminal arranges report cycle and/or descending path loss change amount, when described terminal meets described report cycle and/or descending path loss change amount, described terminal reports PHR to described base station;
Before the neighborhood path loss of described mapping terminal, also comprise: the performance number that receives described terminal is measured in described base station in receiving the PHR of described terminal to report.
3. method according to claim 1, is characterized in that, also comprises:
According to the local area RSRP of described terminal to report, adjacent area RSRP, upgrade the local area RSRP, the adjacent area RSRP that have stored;
According to the PHR of described terminal to report, upgrade the PHR having stored;
According to the performance number of the described terminal of reception of measuring, upgrade the performance number of the described terminal of reception of having stored.
4. method according to claim 1, is characterized in that, described according to the opportunity of the RSRP of terminal to report and PHR, the step that terminal is classified specifically comprises:
Described base station initialization RSRP timer, PHR timer;
Whether described base station, according to the first predetermined period, receives the described RSRP of described terminal to report and the state of described RSRP timer according to current time, upgrades described RSRP timer;
Whether described base station, according to the second predetermined period, receives the described PHR of described terminal to report and the state of described PHR timer according to current time, upgrades described PHR timer;
According to the state of described RSRP timer and PHR timer, described terminal is classified.
5. method according to claim 4, is characterized in that:
Described the first predetermined period and described the second predetermined period equate, are Transmission Time Interval TTI.
6. method according to claim 5, is characterized in that:
The described RSRP of setting timer specifically comprises: Initial R SRP timer T rSRP=-1, initial p HR timer T pHR=-1;
Described base station is in each the first predetermined period, whether receive the described RSRP of described terminal to report and the state of described RSRP timer according to current time, upgrading RSRP timer specifically comprises: if current time receives local area RSRP, the adjacent area RSRP of terminal to report, T rSRP=0; T else if rSRP>=0 o'clock, T rSRP=T rSRP+ 1;
Whether described base station, in each the second predetermined period, receives the described PHR of described terminal to report and the state of described PHR timer according to current time, upgrades PHR timer and specifically comprises: if current time receives the PHR of terminal to report, T pHR=0; T else if pHR>=0, T pHR=T pHR+ 1;
Described according to the state of RSRP timer and PHR timer, described terminal is classified and specifically comprised: if T pHR<0, identifying described terminal is initial classes terminal; T else if rSRP=0, identifying described terminal is critical edges Terminal Type; T else if pHR=0andT rSRP>0, identifying described terminal is edge Terminal Type; T else if pHR=0andT rSRP<0, identifies Terminal Type centered by described terminal; Be Stabilized terminal otherwise identify described terminal.
7. method according to claim 6, is characterized in that, described in each the first predetermined period, whether receives the described RSRP of described terminal to report and the state of described RSRP timer according to current time, upgrades RSRP timer and also comprises:
In the time receiving the adjacent area RSRP of terminal to report and be A3-2 Event triggered result, base station is that described terminal starts interim timer T temp=0, wherein, described A3-2 event is for leaving the RSRP event that reports that triggers;
Each TTI adds 1 afterwards, in the time that described interim timer is greater than default Tth, puts T rSRP=-1, P rSRP_s=0, P rSRP_b=0, close described interim timer, default T thspan is 1-2s;
In described interim timer timing course, if receive adjacent area RSRP of described terminal to report, close this timer, until described terminal has the RSRP of A3-2 Event triggered to report, more again start interim timer for described terminal.
8. method according to claim 7, is characterized in that, described according to the result of classification, the local area RSRP of storage, adjacent area RSRP, PHR, and measure the received power value obtaining, the neighborhood path loss that shines upon described terminal specifically comprises:
If terminal is initial classes terminal, do not calculate neighborhood path loss; Terminal is critical edges Terminal Type, PL else if b=P rSRP_b-P rS; Terminal is edge Terminal Type else if, △ P1=P c_max-P pHR-P r, △ P2=P rSRP_s-P rS, △ P3=P rSRP_b-P rS_b, PL b=△ P3+ △ P2-△ P1; Terminal is center Terminal Type else if, △ P1=P c_max-P pHR-P r, PL b=△ P1+n × Thr_p; Otherwise PL b=PL b,
Wherein, PL bfor neighborhood path loss estimated value, P rSRP_bfor the RSRP of adjacent area, P rSfor serving BS reference signal transmitting power, P c_maxfor terminal maximum transmission power, P pHRfor the power of PHR; P rfor received power value; P rSRP_sfor local area RSRP; P rS_bfor neighbor base station reference signal transmitting power, if not mutual reference signal transmitting power between base station makes P rS_balso be serving BS reference signal transmitting power, Thr_p triggers the difference power thresholding that RSRP reports, n ∈ [1,6], and n is relevant to the local area path loss of terminal, and the larger n value of local area path loss is less.
9. a device for neighborhood path loss mapping, is applied to TDD-LTE system, is positioned at base station, it is characterized in that, comprising:
Initialization module, is used to terminal that RSRP trigger parameter and PHR trigger parameter are set, for monitoring path loss information; Measure the performance number that receives described terminal;
Sort module, for according to the opportunity of described terminal to report RSRP and/or PHR, classifies to described terminal;
Mapping block, for according to the result of described classification, the local area RSRP of storage, adjacent area RSRP, PHR, and the performance number of described receiving terminal, shine upon the neighborhood path loss of described terminal.
10. device according to claim 9, is characterized in that, described initialization module comprises:
RSRP initialization submodule, be used to described terminal that RSRP difference power threshold parameter is set, in the time that the local area RSRP of described terminal is less than described difference power threshold parameter with the strongest adjacent area RSRP difference power, described terminal reports local area RSRP, adjacent area RSRP to described base station;
PHR initialization submodule, is used to described terminal that report cycle and/or descending path loss change amount are set, and in the time that described terminal meets described report cycle and/or descending path loss change amount, described terminal reports PHR to base station;
Received power value submodule, for measuring the performance number that receives described terminal in receiving the PHR of described terminal to report.
11. devices according to claim 9, is characterized in that, described sort module specifically comprises that timer RSRP timing submodule, PHR timing submodule and state arrange submodule, wherein:
Whether described RSRP timing submodule, for the initial condition of RSRP timer is set, and according to the first predetermined period, receive the described RSRP of described terminal to report and the state of described RSRP timer according to current time, upgrades described RSRP timer;
Described PHR timing submodule, for the initial condition of RSRP timer and PHR timer is set, and according to the second predetermined period, whether receive the described PHR of described terminal to report and the state of described PHR timer according to current time, upgrade described PHR timer;
Described state arranges submodule, for according to the state of described RSRP timer and described PHR timer, described terminal is classified.
12. devices according to claim 11, is characterized in that, described the first predetermined period and described the second predetermined period equate, be TTI:
Described RSRP timing submodule, for Initial R SRP timer T rSRP=-1, if when current time receives local area RSRP, the adjacent area RSRP of terminal to report, T rSRP=0; T else if rSRP>=0 o'clock, T rSRP=T rSRP+ 1;
Described PHR timer submodule, for initial p HR timer T pHR=-1, if current time receives the PHR of terminal to report, T pHR=0; T else if pHR>=0, T pHR=T pHR+ 1;
Described state arranges submodule, if for T pHR<0, identifying described terminal is initial classes terminal; T else if rSRP=0, identifying described terminal is critical edges Terminal Type; T else if pHR=0andT rSRP>0, identifying described terminal is edge Terminal Type; T else if pHR=0andT rSRP<0, identifies Terminal Type centered by described terminal; Be Stabilized terminal otherwise identify described terminal.
13. devices according to claim 12, is characterized in that, in the time receiving the adjacent area RSRP of terminal to report and be A3-2 Event triggered result, also comprise interim timing submodule,
Described interim timing submodule, for the interim timer T of initialization temp=0, each TTI adds 1 afterwards, when described interim timer is greater than default T thtime, T rSRP=-1, P rSRP_s=0, P rSRP_b=0, close described interim timer, default T thspan is 1-2s; In described interim timer timing course, if receive adjacent area RSRP of described terminal to report, close described interim timer, until described terminal has the RSRP of A3-2 Event triggered to report, again start interim timer for described terminal again, wherein, described A3-2 event is for leaving the RSRP event that reports that triggers.
14. devices according to claim 13, is characterized in that:
Described mapping block, for being initial classes terminal for terminal, does not calculate neighborhood path loss; Terminal is critical edges Terminal Type, PL else if b=P rSRP_b-P rS; Terminal is edge Terminal Type else if, △ P1=P c_max-P pHR-P r, △ P2=P rSRP_s-P rS, △ P3=P rSRP_b-P rS_b, PL b=△ P3+ △ P2-△ P1; Terminal is center Terminal Type else if, △ P1=P c_max-P pHR-P r, PL b=△ P1+n × Thr_p; Otherwise PL b=PL b,
Wherein, PL bfor neighborhood path loss estimated value, P rSRP_bfor the RSRP of adjacent area, P rSfor serving BS reference signal transmitting power, P c_maxfor terminal maximum transmission power, P pHRfor the power of PHR; P rfor received power value; P rSRP_sfor local area RSRP; P rS_bfor neighbor base station reference signal transmitting power, if not mutual reference signal transmitting power between base station makes P rS_balso be serving BS reference signal transmitting power, Thr_p triggers the difference power thresholding that RSRP reports, n ∈ [1,6], and n is relevant to the local area path loss of terminal, and the larger n value of local area path loss is less.
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