WO2012000340A1

WO2012000340A1 - Method and apparatus for mapping pathloss of neighboring cell

Info

Publication number: WO2012000340A1
Application number: PCT/CN2011/072952
Authority: WO
Inventors: 路陈红
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-07-02
Filing date: 2011-04-18
Publication date: 2012-01-05
Also published as: CN102316481A; CN102316481B

Abstract

The present invention discloses a method and an apparatus for mapping pathloss of a neighboring cell in a Time Division Duplex-Long Term Evolution (TDD-LTE) system. The method includes: a Base Station (BS) configuring a Reference Signal Received Power (RSRP) trigger parameter and a Power Headroom Report (PHR) trigger parameter for terminals; classifying the terminals based on the time when the terminals report the RSRPs and/or PHRs; and mapping the neighboring cell pathloss of the terminal based on the classification result, stored RSRP of the local cell, stored RSRP and PHR of the neighboring cell and the measured receiving power values of the terminals. With the present invention, the terminals are classified based on various pathloss-related power information reported by the terminals and the update time, and the neighboring cell pathloss of the terminal is estimated based on the classification result. Therefore, the BS obtains the pathloss information of a neighboring cell, and the TDD-LTE uplink power control with limited interference is realized.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a neighboring path loss mapping applied to Time Division Duplex-Long-Term Evolution (TDD-LTE). Method and device. BACKGROUND OF THE INVENTION Power control is one of the key technologies for communication systems to implement resource allocation and interference management. In the mobile communication system, the uplink power control is also called reverse link power control. The effective uplink power control method can reduce the transmission power of the user terminal and reduce the transmission between the terminals under the premise of satisfying the communication quality requirements of the user. Thousands of disturbances, extend the standby time of the terminal, and increase the capacity of the communication system. In the existing mobile communication system, there are generally two methods for controlling the transmission power of the terminal: one is to control the receiving power of each user terminal in the service area to the serving base station; the other is to control the interference power of each user terminal in the service area to the neighboring area. . The first method is to increase the received signal-to-noise ratio by raising the received power in order to improve the terminal throughput. However, if each base station in the network uses such a control idea, the receiving power of the terminal is increased, and the neighboring area received by the terminal is also increased, so that the gain of the received signal is not obtained, resulting in a large consumption of the terminal. The transmit power is not improved by the throughput, and the throughput may even drop due to the inaccuracy of the estimation of the interference. The second method is to determine the maximum power allowed to be transmitted by the terminal based on the interference level of the neighboring area, and determine the power of the terminal according to the power headroom. In the network, each base station in the network controls the terminal to limit the neighboring area, and can realize the limitation of the neighboring area by a thousand, so that the receiving signal can be accurately estimated, the transmission rate can be predicted, and the terminal throughput can be improved. the amount. Of course, the method needs to obtain the path loss information of the terminal to the neighboring area by controlling the terminal to interfere with the neighboring area. At present, the 3GPP (3rd Generation Partnership Project) organized by the 3GPP (3rd Generation Partnership Project) supports the TD-SCDMA (Time Division-Synchronous Code Division Multiple Acsess) system to report the terminal to the base station. Neighborhood road loss information. However, in the LTE system, the terminal does not support the LTE system to report the neighboring path loss information to the base station, so that the interference-limited uplink power control cannot be implemented. In the process of implementing the present invention, the inventors realized that the prior art has the following drawbacks: In the TDD-LTE system, the base station cannot know the path loss of the neighboring area. SUMMARY OF THE INVENTION In view of this, an object of the present invention is to provide a method and apparatus for mapping a neighboring path loss to solve the problem that the base station cannot know the path loss of the neighboring area in the TDD-LTE system. According to an aspect of the present invention, a method for neighboring path loss mapping is provided, which is applied to a Time Division Duplex-Long Term Evolution (TDD-LTE) system, including: a base station sets a reference signal received power (RSRP) trigger parameter for a terminal. The power headroom report (PHR) triggers parameters and monitors the path loss information; classifies the terminals according to the timing of reporting the RSRP and/or PHR by the terminal; according to the classification result, the stored RSRP, neighboring area RSRP, PHR, and measurement Receiving the power value of the terminal, and mapping the neighbor's path loss of the terminal. The setting of the RSRP triggering parameter for the terminal by the base station may include: the base station setting the RSRP power difference threshold parameter for the terminal, and when the difference between the RSRP of the local area and the RSRP of the strongest neighboring area is less than the power difference threshold parameter, the terminal reports the area RSRP to the base station. And the neighboring area RSRP; and the base station setting the PHR triggering parameter for the terminal may include: the base station sets the reporting period and/or the downlink path loss change amount for the terminal, and when the terminal satisfies the last 4艮 period and/or the downlink path loss change amount, the terminal sends the base station to the base station. Reported to PHR. The monitoring of the path loss information may include: the base station updating the stored local area RSRP and the neighboring area RSRP according to the local area RSRP and the neighboring area RSRP reported by the terminal; and updating the stored PHR according to the PHR of the terminal on the terminal; The power value of the receiving terminal is measured while receiving the PHR reported by the terminal, and the stored power value of the received terminal is updated according to the measured power value of the receiving terminal. Preferably, the step of classifying the terminal according to the timing of the RSRP and the PHR reported by the terminal may include: the base station initializing the RSRP timer, the PHR timer; and the base station receiving, according to the first preset period, whether the RSRP reported by the terminal is received according to the current time. And updating the RSRP timer according to the status of the RSRP timer; the base station updates the PHR timer according to whether the current time receives the status of the PHR and PHR timers reported by the terminal according to the second preset period; according to the RSRP timer and the PHR The status of the timer, which classifies the terminal. Preferably, the first preset period and the second preset period are equal, each being a transmission time interval (TTI) „ Preferably, the setting of the RSRP timer may include: an initial RSRP timer T = _1, an initial PHR timer r _pffi? = -l; the base station receives, at each first preset period, whether the terminal is received according to the current time. The status of the RSRP and the RSRP timer, the update of the RSRP timer specifically includes: If the current time receives the RSRP of the local area reported by the terminal, the neighboring area RSRP, T 0 ·, otherwise, if the J _RSRP ≥ 0, the T base station is in each of the The second preset period, according to whether the current time receives the status of the PHR and the PHR timer reported by the terminal, the update of the PHR timer specifically includes: if the PHR reported by the terminal is received at the current time, T=0, otherwise if r _pffi? ≥ 0,

T = T _PHR +\; According to the state of the RSRP timer and the PHR timer, classifying the terminal specifically includes: if ^^ O , the identification terminal is an initial class terminal; otherwise, if ^{7 = Q} , the identification terminal is a critical edge terminal Otherwise, if ^T _P m = ^{Q and T} RSRP ^{> Q} , the identification terminal is an edge type terminal; otherwise, if ^ ^TpHR = ^{0 and} < ⁰ , the identification terminal is a central type terminal; otherwise, the identification terminal is a stable type terminal. Preferably, in each first preset period, according to whether the status of the RSRP and the RSRP timer reported by the terminal is received at the current time, updating the RSRP timer further includes: when receiving the neighboring area RSRP reported by the terminal is an A3-2 event When the result is triggered, the base station starts a temporary timer for the terminal.

T _temp = 0; then each TTI is incremented by 1, when the temporary timer is greater than the preset ⁷ *, =~ί,

Ρ _s =0 , P _b =0, the temporary timer is turned off, the preset ⁷ * is in the range of l-2s; during the temporary timer counting process, if the neighboring area RSRP is received on the terminal, the The timer, until the terminal has an RSRP report triggered by the A3-2 event, and then restarts the temporary timer for the terminal. Preferably, according to the result of the classification, the stored local area RSRP, the neighboring area RSRP, the PHR, and the received power value obtained by the measurement, the neighboring path loss of the mapping terminal may include: if the terminal is an initial class terminal, the calculation is not performed. Neighbor road loss; otherwise, if the terminal is a critical edge terminal, then

_{_{_{PL b = P R s RP _}}} h -P RS ^ otherwise if the terminal is edge-type terminal, the ΔΡ1 = - eyebrow _{_{- ^ = P RSRP _ S -P}} RS ^ ΔΡ3 = / ^ ¾ - ^ ¾, ¾ = Δ 3 + ΔΡ2-Δ 1. Otherwise if the terminal is a ', class terminal, J3⁄4'J API = P _c - P _Pm _P _R , ΡΙ^ = ΑΡΙ + η ΤΗΓ _p; otherwise Μ PL _b = PL _b , PJ _3⁄4 is the estimated path loss of the neighboring cell, /^ _3⁄4 is the RSRP of the neighboring cell, the reference cell transmit power of the serving base station, _max is the maximum transmit power of the terminal, P _Pffi? is the power of the PHR; _3⁄4 is the received power value; ^ is the area RSRP; _3⁄4 is the neighboring base station reference signal transmission power, if the base station does not exchange the reference signal transmission power, then the reference base station is also the transmit power of the reference signal, Thr _p is the power difference threshold that triggers the RSRP report, "^ ¹ , ⁶ ] , "Related to the road loss of the terminal in this area, the larger the road loss in this area, the smaller the value. According to another aspect of the present invention, a device for mapping a neighboring path loss is provided, which is applied to a TDD-LTE system, and is located at a base station, and includes: an initialization module, configured to set an RSRP trigger parameter and a PHR trigger parameter for the terminal, and monitor the path. The loss module; the classification module is configured to classify the terminal according to the timing of reporting the RSRP and/or the PHR by the terminal; the mapping module is set to the result of the classification, the stored RSRP of the local area, the neighboring area RSRP, the PHR, and the measured Receiving the power value of the terminal, and mapping the neighbor path loss of the terminal. The initialization module includes: an RSRP initialization sub-module, configured to set an RSRP power difference threshold parameter for the terminal. When the RSRP power difference between the local area RSRP and the strongest neighboring area is less than the power difference threshold parameter, the terminal sends the RSRP to the base station. In the neighboring area RSRP, the local area RSRP and the neighboring area RSRP are stored on the terminal; the PHR initialization sub-module is used to set the reporting period and/or the downlink path loss change amount for the terminal, when the terminal satisfies the reporting period and/or the downlink The amount of loss change, when the terminal reports the PHR to the base station, stores the PHR on the terminal; the received power value module is set to measure the power value of the receiving terminal while receiving the PHR on the terminal. Preferably, the classification module specifically includes a timer initialization submodule, an RSRP timing submodule,

The PHR timing sub-module and the status setting sub-module, wherein: a timer initialization sub-module, configured to set an initial state of the RSRP timer and the PHR timer; and an RSRP timing sub-module, configured to follow the first preset period, according to whether the current time is The status of the RSRP and the RSRP timer reported by the terminal is received, and the RSRP timer is updated. The PHR timing sub-module is configured to update the status of the PHR and PHR timers reported by the terminal according to the current preset time according to the second preset period. PHR timer; The status setting sub-module is set to classify the terminal according to the status of the RSRP timer and the PHR timer. Preferably, the first preset period and the second preset period are equal, each is a TTI: RSRP timing sub-module, used for the initial RSRP timer r _RWP = -l, if the current time is received on the terminal 4艮 όThis area RSRP, area RSRP day, T _RSRP = 0; No Bay 'J ^ 口果r _RSRP ≥ 0 day, T PHR timer sub-module, used for initial PHR timer r _pffi? =-l, if At the current moment, the PHR of the terminal is received, T _PHR =0; otherwise, if T _pm >0, T _PHR =T _PHR +l; the state setting sub-module is used to identify the terminal as the initial class if r _Pffi? <o Terminal; otherwise, if ^ = 0, the terminal is a critical edge terminal; otherwise, if T _pm =0 and T > ϋ, the terminal is an edge terminal; otherwise, if r _pffi? = 0 and T < 0, the terminal is a central terminal; Otherwise, the terminal is identified as a stable-type terminal. Preferably, when receiving the neighboring area RSRP on the terminal is the triggering result of the Α3-2 event, the temporary timing sub-module is further included, and the temporary timing sub-module is used to initialize the temporary timer ⁷ ^ ^ ^=Q , and then each TTI is incremented by 1, when the temporary timer is greater than the default ^Γ *

^P RSRp_ _b = ⁰ , the temporary timer is turned off, the preset ⁷ * is in the range of l-2s; during the temporary timer timing, if a neighboring area RSRP is received on the terminal, the temporary timer is turned off until The terminal has the RSRP report triggered by the A3-2 event, and then restarts the temporary timer for the terminal. Preferably, the mapping module is configured to calculate the neighbor path loss for the terminal as the initial class terminal; otherwise, if the terminal is the critical edge class terminal,

_B _P _RS Otherwise, if the terminal is an edge class terminal, then ΔΡ1 - layer - A, AP2 = P _{RSRP S -} P _RS , AP3 = P _{RSRP B -} P _{RS B} ,

ΡΣ, =ΑΡ3 + ΑΡ2-ΑΡ\; otherwise, if the terminal is a central terminal, then ΔΡ1 = P _{c max} — Ρ layer — P _R ,

PL _b = APl + nxThr _p; otherwise ^{Ρ ⁼ Ρ,} wherein, PJ _¾ pathloss estimate neighbor, / ^ _¾ of RSRP of the neighboring cell, a serving base station reference signal transmit power, _max terminal maximum transmit power, ^ the power for the PHR; ¾ to receive power value; P _RSR ^ RSRP of the present area; _¾ reference signal transmit power of the base station neighbor, if no interaction between the reference signal transmission power of the base station, the serving base station may also make _¾ reference signal transmit power , 73⁄4 -P is the power difference threshold for triggering RSRP reporting, "ε [1,6], "related to the path loss of the local area of the terminal, the larger the path loss in this area", the smaller the value. The method of the present invention proposes an application A method and a device for mapping a neighboring path loss of a TDD-LTE system, wherein the terminal classifies the terminal according to the update timing of the power loss information related to the path loss of the neighboring cell, and maps the terminal neighbor according to the classified and reported power information. The path loss is solved, thereby solving the problem that the base station cannot know the path loss of the neighboring area in the TDD-LTE system, and achieves the purpose of the base station obtaining the path loss information of the neighboring area. The accompanying drawings are used to provide the present invention. The detailed description of the present invention is not intended to limit the invention, and is not intended to limit the invention. FIG. 2 is a flowchart of a method for mapping a path loss of a neighboring area according to a second embodiment of the present invention; FIG. 3 is a schematic diagram of a path loss mapping apparatus for a neighboring area according to an embodiment of the present invention. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with the embodiments. It is to be noted that the embodiments of the present application and the features of the embodiments can be combined with each other without conflict. 1 is a flowchart of a method for mapping a path loss in a neighboring cell according to an embodiment of the present invention. As shown in FIG. 1, the embodiment includes: Step S102: A base station sets a reference signal received power for a terminal (Reference Signal Received Power, RSRP) Trigger parameters and power headroom (Power Headroom Report, PHR for short) trigger parameters, used to monitor changes in path loss information, where RSRP and PHR can reflect path loss information; Step S104, according to the terminal When the time of reporting RSRP and/or PHR is reported, the terminal is classified; Step S106: Map, according to the result of the classification, the stored local area RSRP, the neighboring area RSRP, the PHR, and the measured power value of the receiving terminal, and map the neighboring path loss of the terminal. In this embodiment, the timing of receiving the RSRP and/or the PHR on the terminal specifically includes: the terminal just received the RSRP and/or the PHR, and the terminal never has the RSRP and/or the PHR, and the last terminal The last 4 艮 RSRP and / or PHR has been around for a while. By determining the timing of 4艮RSRP and/or PHR on the terminal, the current state of the terminal can be known, so that the terminal can be classified. In this embodiment, the terminal is classified according to the timing of each power information related to the path loss reported by the terminal, such as RSRP and/or PHR, and the path loss information of the terminal is estimated according to the classification result and the power information related to the path loss. , the purpose of the base station to learn the path loss of the neighboring area is achieved. Method Embodiment 2: FIG. 2 is a flowchart of a method for mapping a path loss of a neighboring area according to Embodiment 2 of the method of the present invention. As shown in FIG. 2, this embodiment includes: Step S202: The base station sets an RSRP trigger parameter and a PHR trigger parameter for the terminal; sets an RSRP timer, a PHR timer; and steps 4 gathers S204, at each transmission time interval (Transmission Time Interval) , Referred to as

(TTI), updating the RSRP timer according to whether the status of the RSRP and the RSRP timer reported by the terminal is received at the current time; Step S206, in each TTI, according to whether the PHR and the PHR timer reported by the terminal are received according to the current time, Updating the PHR timer; Step S208, monitoring the path loss information: updating the stored local area RSRP and the neighboring area RSRP according to the local area RSRP and the neighboring area RSRP on the terminal; and updating the stored according to the PHR reported by the terminal PHR; measuring the power value of the receiving terminal while receiving the PHR reported by the terminal, updating the stored power value of receiving the terminal according to the measured power value of receiving the terminal; Step S210, according to the RSRP timer and the PHR timer The status of the terminal is classified. Step S212, according to the result of the classification, the stored local area RSRP, the neighboring area RSRP, the PHR, and the received power value obtained by the measurement, and the neighboring path loss of the terminal is estimated. In this embodiment, the state of the RSRP timer and the PHR timer is updated in each TTI to achieve accurate estimation of the path loss information. In actual applications, the RSRP timer and the PHR timer may also be separately set. The period is set to achieve the purpose of updating the status of the two timers according to the preset period. Since the uplink and downlink frequency bands of the LTE system are the same, the downlink path loss equivalent uplink path loss of the terminal can be utilized. In this embodiment, the terminal is classified according to the power information and the update time related to the path loss reported by the terminal, and the path loss of the neighboring area is estimated according to the classification result, thereby achieving the purpose of the base station acquiring the path loss information of the neighboring area, and then Implement TDD-LTE interference-limited uplink power control. Method Embodiment 3: This embodiment will further specifically describe the path loss mapping method in the neighboring area on the basis of the second embodiment. This embodiment includes: Step S302, parameter configuration and cache initialization. The base station configures, for each terminal, a power difference threshold parameter that triggers RSRP reporting. The related parameters that are triggered by the PHR are triggered, and the related parameters may be the reporting period and the downlink path loss. At the same time, the base station initializes a path loss related power information buffer for each terminal, which is used to store the local area RSRP, the neighboring area RSRP, the PHR value, and the received power value of the terminal. Furthermore, the base station sets an RSRP timer for obtaining neighboring RSRP information and a PHR timing for obtaining PHR information.

Step S304: Each TTI updates the RSRP timer according to whether the status of the RSRP and the RSRP timer reported by the terminal is received at the current time. Each TTI receives the status of the PHR and the PHR timer reported by the terminal according to the current time. Updating the PHR timer; Step S306, maintaining a path loss related power information cache of each terminal. The base station updates the amount of power information in the path loss related power information buffer of each terminal according to the power information reported by each terminal at the current time and the measured received power. Step S308, classifying each terminal. The base station classifies the terminal according to the values of two timers in the current path loss related power information cache of each terminal in each uplink scheduling subframe. The base station can mainly classify the terminals into five types: the PHR timer is less than zero, and the identifier is the initial class terminal; the RSRP timer is zero, and the identifier is a critical edge type terminal; the RSRP timer is greater than zero, and the PHR timer is zero, and the identifier is Edge-type terminal; RSRP timer is less than zero, PHR timer is zero, and the identifier is a central terminal; RSRP timer is less than zero and PHR timer is greater than zero, or both RSRP timer and PHR timer are greater than zero, and the identifier is stable. Class terminal. Step S310, calculating path loss of each terminal neighboring area. The base station calculates the neighboring path loss of each terminal according to the classification result of each terminal and the amount of power information in the buffer. For the initial class terminal, since it is in the random access process, the power control of the 4th limit is not performed, and the path loss of the neighboring area is not calculated. For the critical edge type terminal, the path loss of the neighboring area is the neighboring area RSRP and RS ( Reference signal, reference signal) difference of transmit power; for edge-type terminals, first calculate the maximum transmit power of the terminal minus the PHR and then subtract the difference of the received power DeltaP 1 , and then calculate the difference between the RSRP and the RS transmit power in this area, DeltaP2, and then calculate The neighboring area RSRP and RS transmit power difference DeltaP3, then the neighboring path loss is DeltaP3+ DeltaP2-DeltaPl; for the central class terminal, first calculate the terminal maximum transmit power minus the PHR and then subtract the received power difference DeltaP 1 , then the neighboring way The loss is DeltaP 1 plus n times the power difference threshold of 4艮 on the RSRP, where the value of n is obtained according to DeltaP 1; for the terminal of the stable class, the path loss of the neighbor calculated last time is unchanged. The present embodiment can be applied to the TDD-LTE system, and uses all the power loss-related power information that can be reported by the terminal to estimate the path loss of the terminal to the neighboring area, and further utilizes the terminal that reports insufficient power information related to the path loss. The reported trigger condition power threshold parameter configured by the base station estimates the neighbor path loss of the terminal. Method Embodiment 4: In this embodiment, the terminal type is distinguished according to the power information and the update time related to the path loss reported by the terminal, so that the terminal path loss of the terminal is estimated by using 40 pairs of different types of terminal characteristics. The embodiment includes: Step S402: Configuring and Cache Initializing the Base Station to configure the power difference threshold parameter 73⁄4r_p reported by the RSRP (Reference Signal Received Power) to trigger the relevant parameters reported by the PHR, so that the terminal can report the required base station. Area RSRP, neighboring area RSRP and PHR parameters. Initialize RSRP in this area as P _s = 0, neighbor RSRP as P _3⁄4 = 0, PHR value P 0 Receive power value P _R = 0; RSRP timer r _RSRP = _l, PHR timer r _pffi? = -1. Step S404: Maintaining the terminal path loss related power information buffer, and updating the timer base station at each TTI, updating each timer according to whether the current time is received by the terminal according to the current time and the current state of the timer, and receiving Update the power information reported to it The amount of power information in the path loss related power information buffer. The T duration timer and RSRP information update method are as follows:

If the current time is received in the neighboring area of the terminal RSRP 4艮

¹ τRSRP updates P _s according to the terminal reporting information, and P Elseif does not receive the neighboring area RSRP of the terminal at the current time;

¹ τRSRP = ¹ τRSRP + ^τ 1 ¹

In addition, when the base station receives the trigger result that the neighboring area RSRP reported by the terminal is an A3-2 event (leave triggering reporting RSRP event), a temporary timer ^=0 is started for the terminal, and 1 is added to each subsequent TTI. When the temporary timer is greater than Γ _ί3⁄4 , set ^=-1, Ρ _s =0,

P _b =0, the temporary timer is turned off, and Γ _ί3⁄4 takes the range of l-2s. During the temporary timer counting process, once a neighboring area RSRP on the terminal is received, the timer is turned off until the terminal has the RSRP triggered by the A3-2 event, and then the temporary terminal is restarted for the terminal. Timer.

The T duration timer and the PHR and the received power information are updated as follows: If the current terminal receives the PHR report from the terminal.

The PHR is updated according to the information on the terminal. The PHR is updated according to the measurement information of the base station.

Elseif does not receive ILr P _p H _m R on the terminal's PHR at the current time _? ≥0 τ PHR = τ PHR + ^τ ι ¹

End Step S408: Classifying each terminal The base station classifies the terminal according to the values of two duration timers in the current path loss related power information cache of each terminal in each uplink scheduling subframe. The classification process is as follows:

If T _PHR < 0 {terminal has never been above 4 PHR} i is only the initial class terminal;

Elseif T = 0 {The terminal has reported the PHR, the current time has just reported the RSRP} The identifier is the critical edge class terminal; Elseif T _PHR = 0 and T > 0 {The terminal has just passed the PHR, and the 4艮 has passed the RSRP} Edge terminal

Elseif T _pm = 0 and T < Q {The terminal has just reported PHR, but never 4RSRP} is identified as a central terminal; Else {other case} is identified as a stable terminal

End Step S410: Calculate the neighboring road loss of each terminal The base station calculates the neighboring path loss PL _{b of} each terminal according to the classification result of each terminal and the amount of power information in the buffer.

If terminal is the initial class terminal Does not calculate the neighborhood path loss;

Elseif terminal is a critical edge terminal

= P - P

Elseif terminal is an edge class terminal

\p = P s -P

= P b - P b

PL _b = ΔΡ3 + ΔΡ2- ΔΡ1 Elseif terminal is the central terminal pp _R

PI^ = APl + nxThr_p Else

PL _h =PL,

End

Wherein neighboring cell path loss estimate, as RSRP neighboring _¾, P is the serving base station reference signal transmit power, _max is the maximum transmit power of the _terminal, P PflR power of the PHR; ¾ reception power value; _S region present RSRP; 7 ₆ is the neighboring base station reference signal transmission power, if the base station does not exchange the reference signal transmission power, then _3⁄4 is also the serving base station reference signal transmission power, 73⁄4r _p is the power difference threshold for triggering RSRP reporting, we [1, 6] , "related to the path loss of the terminal in this area, the larger the path loss in this area", the smaller the value. This embodiment is a specific application of the first embodiment and the second embodiment, and has all the beneficial effects of the foregoing embodiments, and is not repeatedly described herein. Device Embodiment 1: FIG. 3 is a schematic diagram of a neighboring road path loss mapping device according to an embodiment of the present invention. This embodiment discloses an LTE system neighboring path loss mapping device, which is located at a base station. The embodiment includes: an initialization module 302, configured to set an RSRP trigger parameter and a PHR trigger parameter for the terminal, and monitor the path loss information; the classification module 304 is connected to the initialization module 302, and is set according to the timing of reporting the RSRP and/or the PHR by the terminal, The mapping module 306 is connected to the classification module 304, and is configured to map the neighboring area of the terminal according to the result of the classification, the stored local area RSRP, the neighboring area RSRP, the PHR, and the measured received power value of the terminal. damage. The method implemented in this embodiment can refer to the related description of the first embodiment of the method, and has all the beneficial effects of the method embodiment, and is not repeated here. Apparatus Embodiment 2: This embodiment will further explain the adjacent area path loss mapping apparatus on the basis of the embodiment. In this embodiment, the initialization module includes: an RSRP initialization sub-module, configured to set an RSRP power difference threshold parameter. When the RSRP power difference between the local area RSRP and the strongest neighboring area is less than the power difference threshold parameter, the terminal reports the area RSRP to the base station. In the neighboring area RSRP, the RSRP initialization sub-module is also used to store the local area RSRP and the neighboring area RSRP reported by the terminal to the base station; the PHR initialization sub-module sets the reporting period and/or the downlink path loss change amount, when the terminal satisfies the reporting period and The downlink path loss is changed. When the terminal sends a PHR to the base station, the PHR initialization sub-module is further configured to store the PHR reported by the terminal to the base station. The received power value sub-module is set to receive the PHR reported by the terminal. Measuring the power value of the receiving terminal. In this embodiment, the classification module specifically includes an RSRP timing submodule, a PHR timing submodule, and a state setting submodule. The RSRP timing sub-module is configured to set an initial state of the RSRP timer, and update the RSRP timer according to whether the current time receives the RSRP reported by the terminal and the current RSRP timer according to the first preset period; Submodule for setting

The initial state of the PHR timer, and according to the second preset period, according to whether the current time is received or not The status of the PHR and the current PHR timer reported by the terminal, the PHR timer is updated; the status setting sub-module is connected to the RSRP timing sub-module and the PHR timing sub-module, and is set to perform the terminal according to the status of the RSRP timer and the PHR timer. classification. In this embodiment, the first preset period and the second preset period are equal, and each is a TTI RSRP timing sub-module, and is set to an initial RSRP timer r _RSRP =−l, if the current time receives the 4艮 of the terminal When the area RSRP and the neighboring area RSRP, T =0 otherwise, if r _RSRP ≥ 0,

^T RSRP ^{= T} RSRP , PHR timer sub-module, set to the initial PHR timer r _pffi? =-l, if the PHR reported by the terminal is received at the current time, T _PHR =0; otherwise if r _pffi? ≥ 0, T _PHR =T _PHR +l; state setting sub-module, set to if r _Pffi? <o, identify the terminal as the initial class terminal; otherwise if T =0, identify the terminal as a critical edge class terminal; otherwise if T =0 andT > 0, identify The terminal is an edge terminal; No! 1,] If T _pm = 0 and < 0, the terminal is a central terminal; otherwise, the terminal is a stable and fixed terminal. In this embodiment, when the neighboring area RSRP reported by the terminal is triggered by the A3-2 event, the temporary timing sub-module and the temporary timing sub-module are set to initialize the temporary timer 7 ^ =0 , and then each TTI Add 1 and when the temporary timer is greater than the preset T _th , T = -1 , P _s =0,

P _b =0, the temporary timer is turned off, and the preset Γ _ί3⁄4 takes a value range of l-2s; during the temporary timer timing, if a neighboring area RSRP is received on the terminal, the temporary timer is turned off until the terminal There is an RSRP report triggered by the A3-2 event, and the temporary timer is restarted for the terminal. In this embodiment, the mapping module is configured to calculate the neighbor path loss for the terminal as the initial class terminal; otherwise, if the terminal is the critical edge class terminal,

_B _P _RS Otherwise, if the terminal is an edge class terminal, then ΔΡ1 = - layer - AP2 = P _{RSRP S -} P _RS , ^ = P _{RSRP B -} P _{RS B} ,

ΡΣ, =ΑΡ3 + ΑΡ2-ΑΡ\; Otherwise, if the terminal is a central class terminal, then ΔΡ1 = - Ρ layer - P _R ,

_{PL b = ^ P \ + n} Thr_p. Otherwise _{Ρ = Ρ,} wherein, the estimated loss value _¾ neighboring road, RSRP Ρ neighboring, serving base station reference signal transmit power, P _{C max} is the maximum transmit power of the terminal, _? P _Pffi PHR of power; ¾ to receive power value; P _RSR ^ RSRP of the present area; _¾ reference signal transmit power of the base station neighbor, if no interaction between the reference signal transmission power of the base station, the serving base station may also make reference _¾ The signal transmission power, 73⁄4r _p is the power difference threshold for triggering RSRP reporting, we [1, 6], "related to the road loss of the terminal in this area, the larger the road loss in this area", the smaller the value. The method implemented in this embodiment can refer to the related descriptions of the method embodiments 1 to 3, and has all the beneficial effects of the above embodiments, which will not be further described in J3⁄4. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

A neighboring road loss mapping method applied to a time division duplex-long-term evolution TDD-LTE system, including:

The base station sets the reference signal receiving power for the terminal, the RSRP trigger parameter and the power headroom report PHR trigger parameter, and monitors the path loss information;

According to the timing of reporting the RSRP and/or the PHR by the terminal, classifying the terminal; according to the result of the classification, storing the local area RSRP, the neighboring area RSRP, the PHR, and the measured power value of receiving the terminal, mapping The neighboring path loss of the terminal.

The method according to claim 1, wherein the setting, by the base station, the RSRP triggering parameter for the terminal comprises: setting, by the base station, an RSRP power difference threshold parameter for the terminal, where the RSRP of the terminal is the strongest When the neighboring area RSRP power difference is smaller than the power difference threshold parameter, the terminal sends the local area RSRP and the neighboring area RSRP to the base station;

The setting, by the base station, the PHR triggering parameter for the terminal includes: setting, by the base station, a reporting period and/or a downlink path loss, for the terminal, when the terminal meets the reporting period and/or the downlink path loss, Said terminal to the base station 4 艮 PHR;

The neighboring path loss of the mapping terminal further includes: the base station measuring the power value of the receiving terminal while receiving the PHR reported by the terminal.

The method according to claim 1, wherein the monitoring of the path loss information comprises: updating the stored RSRP of the local area and the RSRP of the neighboring area according to the RSRP of the local area and the RSRP of the neighboring area reported by the terminal;

Updating the stored PHR according to the PHR reported by the terminal;

Receiving the power value of the terminal while receiving the PHR on the terminal, and updating the stored power value of the received terminal according to the measured power value of the terminal.

The method according to claim 1, wherein the step of classifying the terminal according to the timing of the RSRP and the PHR reported by the terminal specifically includes: The base station initial RSRP timer, PHR timer;

According to the first preset period, the base station receives the RSRP of the terminal and the RSRP timer according to the current time. State, updating the RSRP timer;

The base station updates the PHR timer according to whether the PHR and the PHR timer of the terminal are received according to the current preset time according to the second preset period; and the RSRP timer is used according to the RSRP timer. And the status of the PHR timer, the terminal is classified. The method according to claim 4, wherein the first preset period and the second preset period are equal, each being a transmission time interval TTI.

The method according to claim 5, wherein the setting the RSRP timer specifically comprises: an initial RSRP timer r _RSRP = -l, an initial PHR timer r _pffi? = - 1; the base station is in each first pre Setting a period according to whether the RSRP of the terminal and the RSRP timer are received according to the current time! The update of the RSRP timer specifically includes: if the current time receives the RSRP of the local area reported by the terminal, the neighboring area RSRP,

T _RS RP ^{= Q} ; otherwise, if _RSRP ≥ 0, the base station receives the status of the PHR and the PHR timer on the terminal according to the current time in each second preset period. The updating of the PHR timer specifically includes: if the current time receives the PHR reported by the terminal, T = ΰ; otherwise, if τ PHR > ― 0 ^u , ' Τ PHR = Τ PHR + ^τ 1 ¹ · , the RSRP timer and The state of the PHR timer, the classifying the terminal specifically includes: if r _Pffi? < o , identifying the terminal as an initial class terminal;

T = 0 , identifying the terminal as a critical edge class terminal; otherwise if

T _PHR = 0 and T > 0 , identifying the terminal as an edge class terminal; otherwise T =0 and T 0 , the terminal is identified as a central terminal; otherwise, the terminal is identified as a stable terminal. The method according to claim 6, wherein, in each first preset period, updating the RSRP timer according to whether the RSRP of the terminal and the status of the RSRP timer are received according to the current time. Also includes:

When receiving the neighboring area RSRP reported by the terminal is an A3-2 event triggering result, the base station starts a temporary timer T _temp = 0 for the terminal; then each TTI is incremented by 1, when the temporary timer is greater than the preset T _th When J _RSRP = -1 , P _s =0, P _3⁄4 = 0, the temporary timer is turned off, and the preset T _{th is in the} range of l-2s; during the temporary timer counting, if To the neighboring area RSRP on the terminal, the timer is turned off until the terminal has an RSRP capped by the A3-2 event, and the temporary timer is restarted for the terminal. The method according to claim 7, wherein, according to the result of the classification, the stored local area RSRP, the neighboring area RSRP, the PHR, and the measured received power value, mapping the neighboring path loss of the terminal specifically includes: If the terminal is an initial class terminal, the neighboring path loss is not calculated; otherwise, if the terminal is a critical edge class terminal, ? =? _b _P _RS ; otherwise if the terminal is an edge class terminal, then

A I =

'-" ^{1 1} pc max - ¹ P PHR - ^J PR , AP

' ^ - " ^ = ¹ P RSRP s - ¹ P RS , ' A ^P3 ^J = ¹ P RSRP b - ¹ P RS _b , '

PL _b =AP3 + AP2-APl ; otherwise the terminal is a central terminal, then ^ = P _C — _P _PHR _P _R , ΡΙ, =ΑΡ\ + η ηΓ_ρ; otherwise PL _b = PL _b , where PJ _3⁄4 is Estimated path loss of the neighboring cell, /^ _3⁄4 is the RSRP of the neighboring cell, the reference signal transmit power of the serving base station, _max is the maximum transmit power of the terminal, and the power of P _pm is; 3⁄4 is the received power value; P _RSR ^ is the RSRP of the area _3⁄4 is the neighboring base station reference signal transmission power, if the base station does not exchange the reference signal transmission power, then the service base is also Station reference signal transmission power, 73⁄4r _p is the power difference threshold that triggers RSRP reporting, we [1, 6], "related to the road loss of the terminal in this area, the greater the road loss in this area", the smaller the value.

A device for mapping a path loss in a neighboring area, which is applied to a TDD-LTE system, and is located at a base station, and includes: an initialization module, configured to set an RSRP trigger parameter and a PHR trigger parameter for the terminal, for monitoring path loss information; The power value of the terminal;

a classifying module, configured to classify the terminal according to the timing of reporting the RSRP and/or the PHR by the terminal;

The mapping module is configured to map the neighboring area path loss of the terminal according to the stored result of the local area RSRP, the neighboring area RSRP, the PHR, and the power value of the receiving terminal.

The device according to claim 9, wherein the initialization module comprises:

An RSRP initialization sub-module, configured to set an RSRP power difference threshold parameter for the terminal, where the terminal reports the RSRP power difference between the local area RSRP and the strongest neighboring area to the power difference threshold parameter, the terminal reports to the base station In the RSRP of the local area and the RSRP in the neighboring area, the RSRP of the local area and the RSRP of the neighboring area on the storage terminal;

a PHR initialization sub-module, configured to set an upper 4 艮 period and/or a downlink path loss change amount for the terminal, where the terminal reaches the base station when the terminal satisfies the upper 4 艮 period and/or the downlink path loss change amount When the PHR is reported, the PHR reported by the storage terminal is used;

The receiving power value sub-module is configured to measure the power value of the receiving terminal while receiving the PHR reported by the terminal.

The device according to claim 9, wherein the classification module comprises a timer RSRP timing sub-module, a PHR timing sub-module and a status setting sub-module, wherein: the RSRP timing sub-module is configured to set an RSRP timing The initial state of the device, and according to the first preset period, according to whether the RSRP and the RSRP timer reported by the terminal are received according to the current time; State, updating the RSRP timer;

The PHR timing sub-module is configured to set an initial state of the RSRP timer and the PHR timer, and according to the second preset period, according to whether the current time is received, the PHR and the PHR timing on the terminal are received. Status of the device, updating the PHR timer; The status setting submodule is configured to classify the terminal according to the status of the RSRP timer and the PHR timer.

12. The apparatus according to claim 11, wherein the first preset week and the second preset period are equal, each being a TTI: the RSRP timing submodule, set to an initial RSRP timer r _RSRP =_l, if the current time receives 4本 local RSRP and neighbor RSRP, T = 0; otherwise, if r _RSRP ≥ o, T 1 the PHR timer sub-module is set to the initial PHR timer r _pffi? = -1 , if the current time receives 4 _艮 PHR on the terminal, T =0 otherwise if r _pffi ≥ 0 , τ PHR = τ PHR +1 ¹ · , the status setting sub-module is set to r _Pffi? <o , identifying the terminal as an initial class terminal; otherwise, if ^ = 0, identifying the terminal as a critical edge class terminal; otherwise, if T _pm =0 andT > ϋ, identifying the terminal as an edge class terminal; Otherwise if

T _PHR = 0 and T <0, the terminal is identified as a central terminal; otherwise, the terminal is identified as a stable terminal.

The apparatus according to claim 12, wherein when the neighboring area RSRP reported by the terminal is triggered by the A3-2 event, the temporary timing sub-module is further included, and the temporary timing sub-module is set to initialize the temporary timing. 7^=0, then each TTI is incremented by 1. When the temporary timer is greater than the preset _Tth , T = -1, P _s =0,

P _b =0, the temporary timer is turned off, and the preset Γ _33⁄4 takes a value range of l-2s; during the temporary timer timing, if a neighboring area RSRP is received on the terminal, the system is turned off. The temporary timer is until the terminal has an RSRP report triggered by the A3-2 component, and then restarts the temporary timer for the terminal.

14. Apparatus according to claim 13 wherein: The mapping module is configured to calculate the neighboring path loss for the terminal as the initial class terminal; otherwise, if the terminal is a critical edge class terminal, then _b- P _RS ; otherwise if the terminal is an edge class terminal, then AP1 = layer - A, P2 = P _{RSRP s} -P _RS , h - ^p Rs b = ΔΡ3 + Δ 2- ΔΡ1; otherwise if the terminal is a central terminal, then ΔΡ1 = eyebrow - ^ PL _b = ^^Thr_p. Otherwise _{PLb = PLb} , PJ _3⁄4 is the estimated path loss of the neighboring cell, /^ _3⁄4 is the RSRP of the neighboring cell, the transmit power of the reference signal of the serving base station, _max is the maximum transmit power of the terminal, P _PHR is the power of the PHR; is the received power value; region RSRP; 7 ₆ the base station reference signal transmission power of the neighboring cell, if not interact reference signal transmit power between base stations, then let _¾ also serving base station reference signal transmit power, 7¾ _r _ _p trigger RSRP reported by power difference threshold, WE [1,6], "Related to the road loss of the terminal in this area, the larger the road loss in this area" the smaller the value.