CN102724698B - Indoor wireless network quality assessment method, device and system - Google Patents
Indoor wireless network quality assessment method, device and system Download PDFInfo
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Abstract
The invention provides an indoor wireless network quality assessment method, an indoor wireless network quality assessment device and an indoor wireless network quality assessment system. The indoor wireless network quality assessment method comprises the following steps of: acquiring the random access channel quality of a cell to be assessed, reported by all user terminals, when the cell is free; and determining the indoor wireless network coverage quality of the cell to be assessed according to the random access channel quality and a preset assessment threshold corresponding to the random access channel quality, so that the comprehensiveness and accuracy for assessing the residential indoor network coverage quality of the user are improved, the defect of manual implementation of DT/call quality test (CQT) is overcome, and the cost is reduced.
Description
Technical field
The embodiment of the present invention relates to communication technical field, relates in particular to a kind of indoor wireless networks quality evaluation methods, devices and systems.
Background technology
Along with the development of the communication technology, wireless network is lived for people have brought easily, and along with cellphone subscriber's continuous increase, the pressure of wireless network also constantly increases, and therefore, the test and appraisal of the wireless network covering quality of Dui Ge community and Optimization Work seem particularly important.
For the assessment of outdoor wireless networks covering quality, generally assess by drive test (Drive Test, DT); The assessment of the indoor wireless networks covering quality of living for user is relatively complicated, thereby be generally to calculate evaluation and test indoor wireless networks covering quality according to outdoor drive test result and indoor penetration loss, or evaluate and test in indoor call quality test of fixing a point (Call Quality Test, CQT).
But, the indoor wireless environments significant difference that outdoor wireless environment and user live, the method precision of indirectly evaluating and testing indoor network coverage quality by outdoor Drive Test is inadequate; And the CQT test mode of indoor fixed point is owing to being subject to test terminal, test specification and testing time restriction, there is limitation not comprehensively, how recessive problem cannot expose; And the quantities by DT/CQT testing evaluation indoor wireless networks covering quality is large, and cost is high.
Summary of the invention
For the above-mentioned defect of prior art, the embodiment of the present invention provides a kind of indoor wireless networks quality evaluation methods, devices and systems.
One aspect of the present invention provides a kind of indoor wireless networks quality evaluation method, comprising:
Obtain the Random Access Channel quality of community to be measured at all user terminal to send up of community idle, wherein, described community idle is the minimum time period of telephone traffic in described community to be measured a day;
Determine the indoor wireless networks covering quality of described community to be measured according to described Random Access Channel quality and the default test and appraisal thresholding corresponding with described Random Access Channel quality.
The present invention provides a kind of indoor wireless networks quality evaluation device on the other hand, comprising:
The first acquisition module, for obtaining the Random Access Channel quality of community to be measured at all user terminal to send up of community idle, wherein, described community idle is the minimum time period of telephone traffic in described community to be measured a day;
Processing module, for determining the indoor wireless networks covering quality of described community to be measured according to described Random Access Channel quality and the default test and appraisal thresholding corresponding with described Random Access Channel quality.
Another aspect of the invention provides a kind of indoor wireless networks quality evaluation system, comprises above-mentioned indoor wireless networks quality evaluation device and user terminal.
The indoor wireless networks quality evaluation methods, devices and systems that the embodiment of the present invention provides, by obtaining the Random Access Channel quality of community to be measured at all user terminal to send up of community idle, and determine the indoor wireless networks covering quality of community to be measured according to the Random Access Channel quality reporting and the default test and appraisal thresholding corresponding with Random Access Channel quality, thereby improve the comprehensive and accuracy that the indoor network coverage quality of user's inhabitation is tested and assessed, the defect of having avoided manually carrying out DT/CQT test, has reduced cost.
Brief description of the drawings
Fig. 1 is the flow chart of an embodiment of indoor wireless networks quality evaluation method of the present invention;
Fig. 2 is the flow chart of another embodiment of indoor wireless networks quality evaluation method of the present invention;
Fig. 3 is the structural representation of an embodiment of indoor wireless networks quality evaluation device of the present invention;
Fig. 4 is the structural representation of another embodiment of indoor wireless networks quality evaluation device of the present invention;
Fig. 5 is the structural representation of an embodiment of indoor wireless networks quality evaluation system of the present invention.
Embodiment
Fig. 1 is the flow chart of an embodiment of indoor wireless networks quality evaluation method of the present invention, and as shown in Figure 1, the method comprises:
Step 100, obtains the Random Access Channel quality of community to be measured at all user terminal to send up of community idle, and wherein, described community idle is the minimum time period of telephone traffic in described community to be measured a day;
Indoor wireless networks quality evaluation device as required independent part is deployed in network equipment as in base station or network management system, or concentrates and dispose with network equipment.Indoor wireless networks quality evaluation device obtains the Random Access Channel quality of community to be measured at all user terminal to send up of community idle.It should be noted that, because the concrete radio-resource-configuration of each community in the whole network is different with network load situation, therefore the community idle of each community is not identical yet.Community idle refers to one day time period the most idle of wireless network that community covers, be that time period that the one day internal traffic in community is minimum is such as 4:00-5:00, community idle means that most of user is in indoor rest, (it should be noted that, the outer user's the present embodiment of small part special chamber is ignored), therefore, user terminal is also in indoor, and the communication interaction carrying out at community idle user terminal also occurs in indoor.It should be noted that, it will be understood by those skilled in the art that, have much for the parameter that reflects the Random Access Channel quality that user terminal reports in community idle, illustrate as follows: Random Access Channel access success rate, the time slot pull-in time of Random Access Channel etc. of the periodic report that user terminal issues according to network side in community idle, report cycle under different communication standards difference to some extent, needs to adjust the report cycle of network side according to concrete test scene.
Step 101, determines the indoor wireless networks covering quality of described community to be measured according to described Random Access Channel quality and the default test and appraisal thresholding corresponding with described Random Access Channel quality.
Indoor wireless networks quality evaluation device is obtaining community to be measured after the Random Access Channel quality of all user terminal to send up of community idle, determine the corresponding Random Access Channel quality evaluation thresholding setting in advance according to the particular content of the Random Access Channel quality reporting, thereby the Random Access Channel quality reporting and the Random Access Channel quality evaluation thresholding setting in advance are analyzed to the indoor wireless networks covering quality of determining community to be measured.Due to the particular content difference of Random Access Channel quality, therefore, Random Access Channel quality evaluation thresholding is depending on the particular content of Random Access Channel quality, illustrate as follows: are Random Access Channel access success rates that the report cycle that issues according to network side reports if obtain community to be measured in the Random Access Channel quality of all user terminal to send up of community idle, the default test and appraisal thresholding corresponding with Random Access Channel quality comprises: the threshold value of Random Access Channel access success rate is A, the ratio that the quantity of the user terminal of A accounts for the quantity of all user terminals that report if be less than is more than or equal to default weak covering quality threshold value B, the indoor wireless networks covering quality that shows this community to be measured is poor, need to be optimized, the ratio that the quantity of the user terminal of A accounts for the quantity of all user terminals that report if be less than is less than default B, the indoor wireless networks covering quality that shows this community to be measured is better.
The indoor wireless networks quality evaluation method that the present embodiment provides, by obtaining the Random Access Channel quality of community to be measured at all user terminal to send up of community idle, and determine the indoor wireless networks covering quality of community to be measured according to the Random Access Channel quality reporting and the default test and appraisal thresholding corresponding with Random Access Channel quality, thereby improve the comprehensive and accuracy that the indoor network coverage quality of user's inhabitation is tested and assessed, the defect of having avoided manually carrying out DT/CQT test, has reduced cost.
Fig. 2 is the flow chart of another embodiment of indoor wireless networks quality evaluation method of the present invention, and as shown in Figure 2, the method comprises:
Step 200, obtain the average user terminal quantity of community to be measured every day and the user terminal quantity of community idle, whether the ratio of determining user terminal quantity and average user terminal quantity is more than or equal to default threshold value, if so, obtaining Random Access Channel quality tests and assesses with the indoor wireless networks covering quality to community to be measured;
Indoor wireless networks quality evaluation device obtains the average user terminal quantity of community to be measured every day and the user terminal quantity of community idle, community to be measured compares at the ratio of the average user terminal quantity of the user terminal quantity of community idle and community to be measured every day and default threshold value, judge whether this ratio is more than or equal to default threshold value, if judgement knows that this ratio is more than or equal to default threshold value, illustrate that most of user terminal has the ability of communication interaction in open state, now test effectively can obtain community to be measured in the Random Access Channel quality of all user terminal to send up of community idle community to be measured is carried out to the test and appraisal of indoor wireless networks quality, otherwise community to be measured is not carried out the test and appraisal of indoor wireless networks quality, to ensure the validity of test and appraisal.
Step 201, whether the timer duration that is identified for monitor user ' terminal to report network side signaling message is less than or equal to community idle, if so, performs step 203, otherwise, execution step 202;
Network side is provided with timer, for the network side signaling message of monitor user ' terminal to report, the timer duration of monitoring different network side signaling messages under different communication standards is not quite similar, when arriving the default time of timer, if also do not receive the network side signaling message of user terminal to send up, network side will issue control command to judge that whether user terminal is in normal cluster state to user terminal.Therefore, carry out the reliability of indoor wireless networks quality evaluation in community idle in order to ensure community to be measured, indoor wireless networks quality evaluation device compares by the duration of community idle with for the timer duration of monitor user ' terminal to report network side signaling message, determine whether timer duration is less than or equal to community idle, if, execution step 203, otherwise, execution step 202.
Step 202, reduces timer duration to be less than or equal to described community idle;
Indoor wireless networks quality evaluation device reduces to adjust instruction to network side transmission timer, thereby network side reduces timer duration, meet timer duration and be less than or equal to community idle, to ensure that community to be measured carries out the reliability of indoor wireless networks quality evaluation in community idle.It should be noted that, preferably, indoor wireless networks quality evaluation device can also be adjusted timer duration, so that the integral multiple that the community idle of community to be measured is timer duration is with the quantity equilibrium of the network side signaling message that ensures each user terminal and reported, test result is more accurate.
Step 203, obtains the network side signaling message of community to be measured at all user terminal to send up of community idle from network management system or Iub/Iu/Abis interface;
Indoor wireless networks quality evaluation device can read the network side signaling message of community to be measured at all user terminal to send up of community idle from network management system, or, in 3G communication system, indoor wireless networks quality evaluation device can be from being responsible for core net and radio network controller (Radio Network Controller, RNC) the Iu interface of Signalling exchange between, and obtain the network side signaling message of community to be measured at all user terminal to send up of community idle from the Iub interface of being responsible for Signalling exchange between RNC and NODE-B, or, in 2G communication system, indoor wireless networks quality evaluation device obtains the network side signaling message of community to be measured at all user terminal to send up of community idle from the Abis interface of being responsible for Signalling exchange between base station controller BSC and base transceiver station BTS.It should be noted that, different communication standards obtains different network side signaling messages according to practical application request, with Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, WCDMA) communication system is that example describes: according to 3GPP TS25.331, WCDMA network side signaling message can be at present: RRC connection request message RRC CONNECTION REQUEST, initial directly message transfer INITIAL DIRECT TRANSFER, measurement report message MEASUREMENT REPORT, cell update message CELL UPDATE or up direct message transfer UPLINK DIRECT TRANSFER.
Step 204, resolves described network side signaling message and obtains the Random Access Channel measurement parameter for representing Random Access Channel quality;
Indoor wireless networks quality evaluation device is resolved and is obtained Random Access Channel measurement result field at the network side signaling message of all user terminal to send up of community idle community to be measured, from Random Access Channel measurement result field, obtain the Random Access Channel measurement parameter for representing Random Access Channel quality, it should be noted that, Random Access Channel measurement parameter comprises: received signal code word power (Received Signal Code Power, RSCP), the ratio Ec/Io of received signal strength and adjacent cell interference level, at least one parameter in path loss Path Loss.
Step 205, determines the indoor wireless networks covering quality of described community to be measured according to described Random Access Channel quality and the default test and appraisal thresholding corresponding with described Random Access Channel quality.
Indoor wireless networks quality evaluation device obtain community to be measured all user terminal to send up of community idle for representing after the Random Access Channel measurement parameter of Random Access Channel quality, determine the corresponding Random Access Channel measurement parameter setting in advance test and appraisal thresholding according to the Random Access Channel measurement parameter reporting, thereby the Random Access Channel measurement parameter reporting and the Random Access Channel measurement parameter test and appraisal thresholding setting in advance are analyzed to the indoor wireless networks covering quality of determining community to be measured.Due to Random Access Channel measurement parameter difference, therefore, Random Access Channel measurement parameter test and appraisal thresholding is also different, is exemplified below: when Random Access Channel measurement parameter is Ec/Io, and γ
thresholdEcIofor Ec/Io threshold value, η
thresholdProbabilityfor weak covering quality threshold value, know that if judge the Ec/Io that community to be measured reports in community idle is Ec/Io≤γ
thresholdEcIothe quantity ratio that accounts for the quantity of all Ec/Io that report be more than or equal to η
thresholdProbability, the indoor wireless networks covering quality of community to be measured is poor, need to be optimized in time; When Random Access Channel measurement parameter is RSCP, γ
thresholdRSRPfor RSCP threshold value, η
thresholdProbabilityfor weak covering quality threshold value, know that if judge the RSCP that community to be measured reports in community idle is RSRP≤γ
thresholdRSRPthe quantity ratio that accounts for the quantity of all RSCP that report be more than or equal to η
thresholdProbability, the indoor wireless networks covering quality of community to be measured is poor, need to be optimized in time; When Random Access Channel measurement parameter is Path Loss, according to P
txPower-L
pathLoss=RSRP converts Path Loss to RSRP and processes, wherein, and P
txPowerfor base station transmitting power, L
pathLossfor path loss.
The indoor wireless networks quality evaluation method that the present embodiment provides, under definite community idle of community to be measured and the prerequisite of user terminal validity, by obtaining the network side signaling message of community to be measured at all user terminal to send up of community idle, and obtain Random Access Channel measurement parameter from network side signaling message, determine the indoor wireless networks covering quality of community to be measured according to the Random Access Channel measurement parameter reporting and the default test and appraisal thresholding corresponding with Random Access Channel measurement parameter, thereby improve the comprehensive and accuracy that the indoor network coverage quality of user's inhabitation is tested and assessed, and further ensure the reliability of test and appraisal, avoided manually carrying out the defect of DT/CQT test simultaneously, reduce cost.
The indoor wireless networks quality evaluation method providing in order more clearly to describe above-described embodiment, the present embodiment, by the indoor wireless networks quality of WCDMA communication system small area is tested and assessed as example is elaborated, specifically comprises:
Step (1), the community idle that indoor wireless networks quality evaluation device statistics obtains community to be measured is 4:00 ~ 5:00 in morning, and obtain average start user terminal N(suggestion hourly N >=300 in community to be measured a day) and the start user terminal M of community idle (a hour), judge the Homes Using TV η=M/N of community idle, (suggestion η >=50%), if judgement knows that the Homes Using TV of community idle is greater than 50%, obtaining community to be measured tests and assesses with the indoor wireless networks covering quality to community to be measured in the Random Access Channel quality of all user terminal to send up of community idle.
Step (2), indoor wireless networks quality evaluation device judges that the T3212 timer duration of knowing in WCDMA for the RRC connection request message RRC CONNECTION REQUEST of monitor user ' terminal to report is to equate with community idle duration for 1 hour, obtains the RRC connection request message RRC CONNECTION REQUEST of user terminal to send up.
Step (3), indoor wireless networks quality evaluation device obtains community to be measured at the RRC connection request message RRC of all user terminal to send up of community idle CONNECTION REQUEST from Iub interface, and the image data of this community to be measured is RNC data port.Specify according to 3GPP TS25.331, user terminal reports RRC connection request message RRC CONNECTION REQUEST to network side while only having start-up logging and periodical location area to upgrade, and extracts the related data Ec/Io of the Random Access Channel measurement result field in RRC connection request message RRC CONNECTION REQUEST signaling.
Step (4), indoor wireless networks quality evaluation device obtains the test and appraisal thresholding corresponding with Ec/Io, Ec/Io threshold value γ
thresholdEcIofor-12dB, weak covering quality threshold value η
thresholdProbabilitybe 10%, know that if judge Ec/Io that community to be measured reports in community idle is that the ratio that the quantity of Ec/Io≤-12 accounts for the quantity of all Ec/Io that report is more than or equal to 10%, the indoor wireless networks covering quality of community to be measured is poor, need to be optimized in time, if be less than 10%, the indoor wireless networks covering quality of community to be measured is better, does not need to be optimized.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, in the time carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Fig. 3 is the structural representation of an embodiment of indoor wireless networks quality evaluation device of the present invention, as shown in Figure 3, this device comprises: the first acquisition module 11 and processing module 12, wherein, the first acquisition module 11 is for obtaining the Random Access Channel quality of community to be measured at all user terminal to send up of community idle, wherein, described community idle is the minimum time period of telephone traffic in described community to be measured a day; Processing module 12 is for determining the indoor wireless networks covering quality of community to be measured according to Random Access Channel quality and the default test and appraisal thresholding corresponding with Random Access Channel quality.
Function and the handling process of each module in the indoor wireless networks quality evaluation device that the present embodiment provides, can be referring to the embodiment of the method shown in above-mentioned Fig. 1, and it realizes principle and technique effect is similar, repeats no more herein.
Fig. 4 is the structural representation of another embodiment of indoor wireless networks quality evaluation device of the present invention, as shown in Figure 4, based on embodiment illustrated in fig. 3, the first acquisition module 11 comprises: collecting unit 111 and resolution unit 112, wherein, collecting unit 111 is for obtaining the network side signaling message of community to be measured at all user terminal to send up of community idle from network management system or Iub/Iu/Abis interface; Resolution unit 112 is for resolving network side signaling message and obtaining the Random Access Channel measurement parameter for representing Random Access Channel quality.It should be noted that, network side signaling message is: RRC connection request message, initial directly message transfer, cell update message or up direct message transfer.Random Access Channel measurement parameter comprises: at least one parameter in ratio, the path loss of received signal code word power, received signal strength and adjacent cell interference level;
Further, the first acquisition module 11 also comprises: adjustment unit 113, whether be less than or equal to community idle for the timer duration that is identified for monitor user ' terminal to report network side signaling message, if, obtain network side signaling message, otherwise, reduce described timer duration to be less than or equal to community idle.
Further, described device also comprises: the second acquisition module 13 and start module 14, and wherein, the second acquisition module 13 is for obtaining the average user terminal quantity of community to be measured every day and the user terminal quantity of community idle; Start module 14 and whether be more than or equal to default threshold value for the ratio of determining user terminal quantity and average user terminal quantity, if so, obtain Random Access Channel quality and test and assess with the indoor wireless networks covering quality to community to be measured.
Function and the handling process of each module in the indoor wireless networks quality evaluation device that the present embodiment provides, can be referring to the embodiment of the method shown in above-mentioned Fig. 2, and it realizes principle and technique effect is similar, repeats no more herein.
Fig. 5 is the structural representation of an embodiment of indoor wireless networks quality evaluation system of the present invention, as shown in Figure 5, this system comprises: indoor wireless networks quality evaluation device 1 and user terminal 2, wherein, the indoor wireless networks quality evaluation device that indoor wireless networks quality evaluation device 1 can adopt the embodiment of the present invention to provide, user terminal 2 is the related user terminal of the above embodiment of the present invention.
Function and the handling process of each module in the indoor wireless networks quality evaluation system that the present embodiment provides, can be referring to the embodiment of the method shown in above-mentioned, and it realizes principle and technique effect is similar, repeats no more herein.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. an indoor wireless networks quality evaluation method, is characterized in that, comprising:
Obtain the Random Access Channel quality of community to be measured at all user terminal to send up of community idle, wherein, described community idle is the minimum time period of telephone traffic in described community to be measured a day;
Determine the indoor wireless networks covering quality of described community to be measured according to described Random Access Channel quality and the default test and appraisal thresholding corresponding with described Random Access Channel quality;
Describedly obtain community to be measured and comprise in the Random Access Channel quality of all user terminal to send up of community idle:
Whether the timer duration that is identified for monitor user ' terminal to report network side signaling message is less than or equal to described community idle, if so, obtains described network side signaling message, otherwise, reduce described timer duration to be less than or equal to described community idle;
Obtain the network side signaling message of community to be measured at all user terminal to send up of community idle from network management system or Iub/Iu/Abis interface;
Resolve described network side signaling message and obtain the Random Access Channel measurement parameter for representing Random Access Channel quality.
2. indoor wireless networks quality evaluation method according to claim 1, is characterized in that,
Described Random Access Channel measurement parameter comprises: at least one parameter in ratio, the path loss of received signal code word power, received signal strength and adjacent cell interference level;
Described network side signaling message is: RRC connection request message, initial directly message transfer, cell update message or up direct message transfer.
3. indoor wireless networks quality evaluation method according to claim 1 and 2, is characterized in that, obtains community to be measured before the Random Access Channel quality of all user terminal to send up of community idle described, and described method also comprises:
Obtain the average user terminal quantity of community to be measured every day and the user terminal quantity of community idle;
Whether the ratio of determining described user terminal quantity and described average user terminal quantity is more than or equal to default threshold value, if so, the indoor wireless networks quality of described community to be measured is tested and assessed.
4. an indoor wireless networks quality evaluation device, is characterized in that, comprising:
The first acquisition module, for obtaining the Random Access Channel quality of community to be measured at all user terminal to send up of community idle, wherein, described community idle is the minimum time period of telephone traffic in described community to be measured a day;
Processing module, for determining the indoor wireless networks covering quality of described community to be measured according to described Random Access Channel quality and the default test and appraisal thresholding corresponding with described Random Access Channel quality;
Described the first acquisition module comprises:
Collecting unit, for obtaining the network side signaling message of community to be measured at all user terminal to send up of community idle from network management system or Iub/Iu/Abis interface;
Resolution unit, for resolving described network side signaling message and obtaining the Random Access Channel measurement parameter for representing Random Access Channel quality;
Described the first acquisition module also comprises:
Adjustment unit, whether be less than or equal to described community idle for the timer duration that is identified for monitor user ' terminal to report network side signaling message, if so, obtain described network side signaling message, otherwise, reduce described timer duration to be less than or equal to described community idle.
5. indoor wireless networks quality evaluation device according to claim 4, is characterized in that, described device also comprises:
The second acquisition module, for obtaining the average user terminal quantity of community to be measured every day and the user terminal quantity of community idle;
Start module, whether be more than or equal to default threshold value for the ratio of determining described user terminal quantity and described average user terminal quantity, if so, the indoor wireless networks quality of described community to be measured is tested and assessed.
6. an indoor wireless networks quality evaluation system, is characterized in that, comprises indoor wireless networks quality evaluation device and user terminal as described in claim 4 or 5.
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| CN104796277B (en) * | 2014-01-21 | 2018-12-07 | 中国移动通信集团湖南有限公司 | A kind of Network Fault Detecting method and device |
| CN117376955A (en) * | 2023-11-07 | 2024-01-09 | 杭州纵横通信股份有限公司 | Intelligent monitoring method for indoor network signal quality |
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| CN101801032A (en) * | 2009-12-31 | 2010-08-11 | 中兴通讯股份有限公司 | Indoor access method and communication system |
| CN101990230A (en) * | 2009-07-30 | 2011-03-23 | 大唐移动通信设备有限公司 | Method and equipment for measuring wireless network communication system |
| WO2011083800A1 (en) * | 2010-01-07 | 2011-07-14 | 日本電気株式会社 | Wireless communication system, radio terminal, radio network, wireless communication method and program |
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| CN101990230A (en) * | 2009-07-30 | 2011-03-23 | 大唐移动通信设备有限公司 | Method and equipment for measuring wireless network communication system |
| CN101801032A (en) * | 2009-12-31 | 2010-08-11 | 中兴通讯股份有限公司 | Indoor access method and communication system |
| WO2011083800A1 (en) * | 2010-01-07 | 2011-07-14 | 日本電気株式会社 | Wireless communication system, radio terminal, radio network, wireless communication method and program |
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