The application require on May 22nd, 2012 submit the 61/650th, the priority of No. 135 U.S. Provisional Applications, its disclosure mode by reference all is incorporated into this.
Background technology
In existing network, even terminal remains static down, due to a variety of causes such as air interface radio multipath fadings, terminal receives network signal also can be along with the time changes.Therefore, when carrying out cell measurement, each community is not measured value in the same time may some shake.In addition, if terminal under the nonstatic state, terminal can change apart from the position of each base station and distance, and be reflected to each cell measurement value that shows as that cell signal measures, also has the variation varied in size.But this amplitude of variation is generally limited, and be a time dependent process, do not wait as changed the 10-20db left and right in several seconds.
For the shake back and forth that prevents this air interface signals causes Ping-Pong gravity treatment or the switching of minizone and the up link open loop transmit power is impacted, terminal generally can be carried out the filtering processing to the measured value of single, the measured value after adopting after filtering is as the measurement result of community, carries out gravity treatment, switching, the assessment of the event such as resident and the calculating of path loss.The filtering of general measured value is processed as follows:
Rscp=(1-n) * Rscp_history+n*RscpNew (i+1) formula (1)
Wherein i represents the i time measurement in certain community, Rscp_history represents the historical filter value of preserving before the inferior measurement in community (i+1), RscpNew (i+1) represents the instantaneous value of the inferior measurement in community (i+1), Rscp represents after the inferior measurement in community (i+1) measurement result after processing after filtering, for the assessment of the events such as gravity treatment, switching.
In addition, n is filtering factor, and span is n>0 and n<=1.If n=1, meaning does not have filtering to process, and each measurement result is all got real-time measurement values.The value of n is can not be too large but can not be too little, because each cell measurement all periodically carries out.Too little meeting causes that to converge to actual signal too slow, can not play level and smooth effect again too greatly, specifically can get a rational empirical value according to actual conditions.
Then, new historical filter value: Rscp_history=Rscp more after (i+1) inferior measurement, with the filtering next time for this community.
The introducing of filtering has substantially solved signal jitter on the existing network and has changed some problems of bringing.But in some cases,, while such as the use measuring instrument, terminal being carried out to sensitivity test, the measured value after employing after filtering, as the measurement result of community, can have a strong impact on the sensitivity test result of terminal.Below provided and used measuring instrument terminal to be carried out to two kinds of test scenes of sensitivity test:
(1) open loop power control (OLPC) test: by the transmitting power by measuring instrument-25db and-108dB between switching back and forth, the up link open loop transmit power size of test terminal.
(2) go out service area (OOS) test: the measuring instrument Initial Trans is-25dB, the resident S criterion in community is-114dB, close transmitting of measuring instrument when being tested, when terminal test, to signal during lower than-114dB, triggering terminal enters out the assessment of service area event.
Fig. 1 and Fig. 2 for above-mentioned two kinds of scenes, show when the signal of tester emission from-25dB bust to-108dB respectively or-during 120dB, the signal that terminal is measured decays to the simulation result of needed time actual signal near from-25dB.Here each real-time measurement values of putative signal is accurately and does not have deviously, and the filtering factor n of emulation gets a recommended value 0.25, and cell measuring modulation cycle T identical with paging receiving cycle under standby (agreement regulation 0.64s is to 5.12s).Below respectively the simulation result shown in Fig. 1 and Fig. 2 is analyzed.
For OLPC test, it is 0.25 o'clock that Fig. 1 shows filtering factor, the convergence process of the signal of tester emission terminal measurement result after filtering during from-25dB bust to-108dB, and wherein abscissa unit is the cell measuring modulation cycle under standby.From the simulation result of Fig. 1, when the converge to-106db of measurement result after after filtering is following, at least need 13 measuring periods.But, in the OLPC test, the transmission of up link open loop power is generally all carried out in 10 cycles after signal intensity.Like this, the path loss of utilizing filtered measurement result to calculate can be forbidden, and makes the up link open loop power calculated make mistakes, thereby causes test crash.Here, emulation provides is from-decay to-108dB of 25dB scene, in fact for measuring instrument from-be switched to-25dB of 108dB scene, exist too path loss calculation to be forbidden to cause the up link open loop power to calculate the situation of makeing mistakes.
For OOS, test, it is 0.25 o'clock that Fig. 2 shows filtering factor, the convergence process of the signal of tester emission decay to-114dB of terminal measurement result after filtering during from-25dB bust to-120dB, wherein abscissa unit is the cell measuring modulation cycle under standby.From the simulation result of Fig. 2, filtered measurement result converges to-needs below 114db 10 measuring periods.Yet this simulation result is based on ideally and draws.When terminal is carried out to actual test, for the scene more than the sudden change of the sort signal on measuring instrument 80db, the automatic gain of terminal is controlled (AGC) adjustment also needs a process.Therefore, the actual time that detects service area and enter no net state of terminal can be far longer than 10 measuring periods.
As can be seen here, existing filtering processing mode can not be applicable to top these two kinds of special screnes.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are explained in more detail and illustrate.Should be understood that, drawings and the embodiments of the present invention are only for exemplary effect, not for limiting the scope of the invention.
Describe embodiments of the present invention in detail referring to accompanying drawing.
Fig. 3 shows the flow chart of the method 300 of the measurement result for definite cell signal according to the embodiment of the present invention.
As shown in Figure 3, after method 300 starts, at step S301, store the transient measurement value of the predetermined number of the cell signal strength that the cell measurement of nearest predetermined number obtains.
For example, along with the carrying out of cell measurement, nearest (M+1) the inferior individual instantaneous value RscpReal of (M+1) measured (j) of storage (j=0 ..., M), the initial value of these values is all default empirical value K (unit is for example dB).
(i+M) inferior cell measurement instantaneous value is RscpNew (i+M), and wherein i is positive integer.Before (i+M) inferior cell measurement results is processed:
RscpReal(0)=RscpNew(i-1)
……
RscpReal(M)=RscpNew(i+M-1)
Next, at step S302, the transient measurement value of the predetermined number of storage and first threshold and Second Threshold are compared.
For example, this (M+1) inferior transient measurement value RscpReal (j) compares with default empirical value K respectively recently.K can comprise a higher first threshold and a lower Second Threshold.
Then, method 300 advances to step 303.At step S303, if the transient measurement value of predetermined number all higher than first threshold or all lower than Second Threshold, the current transient measurement value of the cell signal strength current area measured is defined as the current measurement result of cell signal; Otherwise current transient measurement value is carried out to the filtering processing, and filtered current transient measurement value is defined as to the current measurement result of cell signal.
For example, if (M+1) inferior transient measurement value is all higher than higher thresholds or all lower than low threshold value recently, just directly adopt the measurement result of the transient measurement value of current area measurement as community, otherwise this measurement is carried out to the filtering processing, obtain final cell measurement results Rscp.
In one embodiment, store the measurement result of cell signal definite in cell measurement as historical measurement result Rscp_history, and carry out more new historical measurement result by the measurement result of cell signal newly definite in the cell measurement of back, that is:
Rscp_history=RscpNew(i+1)
In one embodiment, the historical measurement result based on storage is carried out the filtering processing with filtering factor to current transient measurement value.
Particularly, can realize current transient measurement value or filtered current transient measurement value are defined as by adjusting filtering factor the current measurement result of cell signal.For example, filtering factor n is revised as to 1, means to abandon filtering, directly adopt the measurement result of current instantaneous value as community.Otherwise filtering factor n gets normal value A.A means the value of filtering factor (0<A<1) under normal circumstances.Based on historical measurement result, to the filtering of current transient measurement value, can carry out with reference to formula (1).
According to the embodiment of the present invention, after (i+M) inferior measured value is carried out to the filtering processing, RscpReal (j) is upgraded, specific as follows:
RscpReal(0)=RscpNew(i)
……
RscpReal(M)=RscpNew(i+M)
Afterwards, physical layer can utilize the filtered measurement result Rscp in community for calculating the associated uses such as path loss.Physical layer can also report the agreement high level by filtered cell measurement results Rscp, with the assessment reference value as cell reselection, switching, the event such as resident.
Here, the value of threshold k can reference terminal in the real work power bracket of outfield net environment.For example, the following value of low can get-100dB of threshold value in K, for example, between arrive-105dB of-102dB; And the above value of can get-30dB of the higher thresholds in K.
When-100dB is following, although can also proceed various tests on measuring instrument, under external field environment, basically can not carry out normal business and resident when power.Therefore, now can consider the problem of Ping-Pong gravity treatment and switching in external field environment.And needing only the cell measurement value higher than KdB, new processing mode just can not come into force in terminal.Therefore, processing policy in this paper can not affect the actual performance of terminal in outfield.Simultaneously, the processing mode of continuous N time transient measurement value before the reference adopted here, can be for example in the situation that be used measuring instrument to carry out to terminal the generation that sensitivity test greatly reduces erroneous judgement.
Like this, in the ideal case, during signal acute variation on the measuring instrument that terminal is carried out to sensitivity test: (1) signal is when dying down by force, through general M after the measuring period, the measurement result of community can directly adopt the transient measurement value to replace filter value, to assess for the event of carrying out and the calculating of path loss; (2) when signal changes from weak to strong, as measuring instrument by cell power from-be switched to-25dB of 108dB, equally through general M after the measuring period, the measurement result of community can directly adopt the transient measurement value to replace filter value, thereby accelerates the speed that filtered measurement result converges to the community actual signal.
Below in conjunction with Fig. 4, the device 400 of the measurement result for definite cell signal according to the embodiment of the present invention is described.As shown in Figure 4, install 400 and comprise memory cell 401 and determining unit 402.
In device 400, memory cell 401 is configured to store the transient measurement value of the predetermined number of the cell signal strength that the cell measurement of nearest predetermined number obtains; Determining unit 402 is configured to the transient measurement value of the predetermined number of storage and first threshold and Second Threshold are compared, if the transient measurement value of predetermined number is all higher than first threshold or all lower than Second Threshold, the current transient measurement value of the cell signal strength current area measured is defined as the current measurement result of cell signal; Otherwise current transient measurement value is carried out to the filtering processing, and filtered current transient measurement value is defined as to the current measurement result of cell signal.
In one embodiment, the measurement result that memory cell 401 also is configured to store cell signal definite in cell measurement is as historical measurement result, and carrys out more new historical measurement result by the measurement result of new definite cell signal in the cell measurement of back.
In one embodiment, the historical measurement result that determining unit 402 also is configured to based on storage is carried out the filtering processing with filtering factor to current transient measurement value.
In one embodiment, determining unit 402 also is configured to realize current transient measurement value or filtered current transient measurement value are defined as by adjusting filtering factor the current measurement result of cell signal.
In one embodiment, first threshold and Second Threshold are to arrange according to the real work power bracket of user terminal.
Should be appreciated that each unit in device 400 is corresponding with each step in the method 300 of describing with reference to figure 3 respectively.Thus, the unit that the operation of above describing for Fig. 3 and feature are equally applicable to device 400 and wherein comprise, detail repeats no more.
It is also understood that method 300 and install 400 and can realize in terminal (as subscriber equipment).In embodiments of the present invention, subscriber equipment can be various types of terminals, such as mobile phone, personal digital assistant (PDA), portable computer etc.
Device 400 can utilize variety of way to realize.For example, in some embodiments, can utilize software and/or firmware module to realize.In addition, also can utilize hardware module to realize.Known or other modes exploitation in the future are also feasible now, and scope of the present invention is unrestricted in this regard.
Fig. 5 is the structural representation of subscriber equipment (UE) 10 according to the embodiment of the present invention.Yet, should be appreciated that as shown in the figure and mobile phone hereinafter described is only the example of the class UE that will be from exemplary embodiment of the invention be benefited, and be not used for limiting the scope of exemplary embodiment of the invention.Although illustrate the execution mode of UE10 for giving an example purpose, for example the voice of the mobile device of the other types of any combination of portable digital assistant (PDA), beep-pager, mobile TV, game station, laptop computer, camera, video tape recorder, audio/video player, broadcast receiver, GPS equipment or aforementioned means and so on and other types and text communication system can easily be used exemplary embodiment of the invention.
In addition, although UE10 can be used the execution mode of the inventive method, the device except UE also can use the method for exemplary embodiment of the invention.In addition, although mainly combine the method and apparatus that mobile communication application has been described exemplary embodiment of the invention, but, should be appreciated that and can in mobile communications industry and beyond mobile communications industry, in conjunction with various other, should be used for utilizing the method and apparatus of exemplary embodiment of the invention.
UE10 can comprise an antenna 12 (or a plurality of antenna) of operationally communicating by letter with receiver 16 with reflector 14.UE10 can also comprise respectively to reflector 14 to be provided signal and receives the device of signals from receiver 16, for example controller 20 or other processing units.Signal comprises the signaling information according to the applicable cellular system air-interface standard, also comprises the data of user speech, reception and/or the data that generated by the user.In this regard, UE10 can utilize one or more air-interface standard, communication protocol, modulation type and access style to operate.For example, UE10 can operate according to any communication protocol in the communication protocols such as a plurality of first generation, the second generation, the third generation and/or the 4th generation.For example, UE10 can according to the second generation (2G) wireless communication protocol IS-136 (time division multiple access (TDMA)), GSM (global system for mobile communications) and IS-95 (code division multiple access (CDMA)) or according to the third generation (3G) wireless communication protocol such such as Universal Mobile Telecommunications System (UMTS), CDMA2000, wideband CDMA (WCDMA) and time-division-synchronization CDMA (TD-SCDMA), according to the 3.9th generation (3.9G) wireless communication protocol as evolved universal terrestrial radio access network (E-UTRAN), according to the 4th generation (4G) wireless communication protocol etc. operate.Replace (or in addition), UE10 can operate according to non-cellular communication mechanisms.For example, UE10 can communicate by letter in WLAN (wireless local area network) (WLAN) or other communication networks.In addition, UE10 can for example communicate by letter according to following technology, and these technology are such as being any technology in radio frequency (RF), infrared ray (IrDA) or a plurality of different radio networking technology (comprise WLAN technology as IEEE802.11 (such as 802.11a, 802.11b, 802.11g, 802.11n etc.), World Interoperability for Microwave Access, WiMax (WiMAX) technology as IEEE802.16 and/or wireless personal domain network (WPAN) technology as IEEE802.15, bluetooth (BT), ultra broadband (UWB) and/or similar techniques).
Be appreciated that for example the such device of controller 20 can comprise audio frequency and the required circuit of logic function of implementing UE10.For example, controller 20 can comprise digital signal processor device, micro processor device and various AD converter, digital-to-analog converter and other support circuit.
In one embodiment, micro processor device is one piece of double frequency or multifrequency CPU.The start-up mode of selecting based on the user, this double frequency or multifrequency CPU can be operated on corresponding frequency.In another embodiment, micro processor device is one piece of host CPU and one piece of auxiliary CPU that operating frequency is lower that operating frequency is higher.The start-up mode of selecting based on the user, or this host CPU work, or this auxiliary CPU work.
The control of UE10 and the signal processing function respective capabilities according to them between these equipment is distributed.Therefore controller 20 also can comprise in order to before modulation and transmission, message and data are carried out to convolutional encoding and the function interweaved.Controller 20 can also comprise internal voice coder and can comprise internal data modem.In addition, controller 20 can comprise the function that can be stored in one or more software program in memory in order to operation.For example, controller 20 can operable communication program, for example conventional Web browser.Then connectivity program can allow UE10 for example according to WAP (wireless application protocol) (WAP), HTTP (HTTP) and/or similar agreement, to carry out the sending and receiving web content, for example location-based content and/or other web page contents.
UE10 can also comprise user interface, and this user interface comprises that the output equipment that all is connected to controller 20 is as conventional earphone or loud speaker 24, ringer 22, microphone 26, display 28 and user input device.The user's input interface that allows UE10 to receive data can comprise any equipment in a plurality of equipment that allow UE10 to receive data, for example input equipment (as, keypad) 30, touch display (not shown) and other input equipments.In the execution mode that comprises keypad 30, keypad 30 can comprise conventional numerical key (0-9) and key (#, *) be arranged and for operating other hardkeys and the soft key of UE10.Replace, keypad 30 can comprise conventional QWERTY arrangements of keypad.Keypad 30 also can comprise the various soft keys with correlation function.In addition or replace, UE10 can also comprise that interface equipment is as joystick or other user input devices.UE10 also comprises for the various circuit supplies to the needs in order to operate UE10 and the battery 34 of mechanical oscillation as detectable output, for example vibrating battery bag is provided alternatively.
UE10 can also comprise Subscriber Identity Module (UIM) 38.UIM38 is generally the memory devices with internal processor.UIM38 can be such as comprising Subscriber Identity Module (SIM), Universal Integrated Circuit Card (UICC), universal subscriber identity module (USIM), detachable Subscriber Identity Module (R-UIM) etc.UIM38 is the storage cell relevant with the mobile subscriber usually.Except UIM38, UE10 can also be equipped with memory.For example, UE10 can comprise volatile memory 40, for example comprises the volatile random access memory (RAM) for the cache area of temporary transient storage data.UE10 also can comprise and can embed and/or demountable other nonvolatile memories 42.In addition or the ground that replaces, nonvolatile memory 42 can also comprise Electrically Erasable Read Only Memory (EEPROM), flash memory etc., the nonvolatile memory that for example can obtain from the Lexar Media company in the SanDisk company in Sani Wei Er city, California or Fei Limeng city, California.Memory can be stored by UE10 and be used for implementing many information of function of UE10 and any information and the data in data.For example, memory can comprise the identifier that can identify uniquely UE10, International Mobile Station Equipment Identification (IMEI) code for example, and can be by the current time position of the adjacent UE that receives and this current moment unique identification association store with neighbouring device.Particularly, memory can be stored the application program for being carried out by controller 20, and this controller is determined the current location of UE10.
UE10 can also comprise the alignment sensor 36 of communicating by letter with controller 20, for example global positioning system (GPS) module.Alignment sensor 36 can be to carry out any device, equipment or the circuit of location positioning for the location to UE10.Alignment sensor 36 can comprise all hardware that carries out location positioning for the location to UE10.Alternatively or additionally, alignment sensor 36 can utilize the memory devices of UE10 to store the instruction of carrying out for controller 20, and its file layout is to determine the required software in position of UE10.Although the alignment sensor 36 of this example can be the GPS module, but alignment sensor 36 can comprise or alternatively be embodied as for example agps system (assistant GPS) transducer or positioning client terminal, this assistant GPS transducer or positioning client terminal can communicate by letter to receive and/or send as aerial or ground transaucer the information of using for when determining the location of UE10 with the network equipment.In this regard, the location of UE10 also can be by GPS, community ID, signal triangulation or other mechanism are determined as mentioned above.In an example embodiment, alignment sensor 36 comprises pedometer or inertial sensor.Like this, alignment sensor 36 can determine UE10 for example take position that the longitude of UE10 and dimension direction and short transverse be reference or with respect to reference point the location as impact point or starting point.Then in the future the information of self-align transducer 36 is sent to memory or another memory devices of UE10, in order to be stored as position history or positional information.In addition, alignment sensor 36 can utilize controller 20 for example, via reflector 14/ receiver 16 sending/receiving positional informations, the location of UE10.
UE10 can also comprise light sensor.
The described block diagram of Fig. 5 illustrates just to the purpose of example, is not limitation of the present invention.In some cases, can add as required or reduce some equipment wherein.
It should be noted that flow chart and block diagram in accompanying drawing, illustrate according to the method and apparatus of the various execution modes of the present invention architectural framework in the cards, function and operation.In this, each square frame in flow chart or block diagram can represent the part of module, program segment or a code, and the part of this module, program segment or code comprises one or more for realizing the executable instruction of logic function of regulation.Also it should be noted that some as alternative realization in, the function marked in square frame also can be according to being different from occurring in sequence of marking in accompanying drawing.For example, in fact the square frame that two adjoining lands mean can be carried out substantially concurrently, and they also can be carried out by contrary order sometimes, and this determines according to related function.Also be noted that, each square frame in block diagram and/or flow chart and the combination of the square frame in block diagram and/or flow chart, can utilize the hardware based system of the special use of the function that puts rules into practice or operation to realize, or can realize with the combination of specialized hardware and computer instruction.
It should be noted that, the disclosed method of embodiments of the present invention can realize in the combination of software, hardware or software and hardware.Hardware components can utilize special logic to realize; Software section can be stored in memory, for example, by suitable instruction execution system (microprocessor, personal computer or large-scale computer), is carried out.In some embodiments, the present invention is embodied as software, and it includes but not limited to firmware, resident software, microcode etc.
And, embodiments of the present invention can also take can from computer can with or the form of the computer program of computer-readable medium access, these media provide program code use or be combined with it for computer or any instruction execution system.For the purpose of description, computer can with or computer-readable mechanism can be any tangible device, it can comprise, storage, communication, propagation or transmission procedure to be to be used or to be combined with it by instruction execution system, device or equipment.
Medium can be electric, magnetic, light, electromagnetism, ultrared or semi-conductive system (or device or device) or propagation medium.The example of computer-readable medium comprises semiconductor or solid-state memory, tape, removable computer diskette, random access storage device (RAM), read-only memory (ROM), hard disk and CD.The example of CD comprises compact disk-read-only memory (CD-ROM), compact disk-read/write (CD-R/W) and DVD at present.
It should be noted that for embodiments of the present invention are easier to understand, top description has been omitted to be known for a person skilled in the art and may to be essential some ins and outs more specifically for the realization of embodiments of the present invention.It is for the purpose of illustration and description that specification of the present invention is provided, rather than for exhaustive or limit the invention to disclosed form.To those skilled in the art, many modifications and distortion all are fine.Under the prerequisite that does not break away from essence of the present invention, within all modifications and distortion all fall into the protection range limited by claims.