CN1564622A - Method of selecting base station of mobile terminal in radio communication system and moble terminal and system for realizing such method - Google Patents
Method of selecting base station of mobile terminal in radio communication system and moble terminal and system for realizing such method Download PDFInfo
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- CN1564622A CN1564622A CN 200410030015 CN200410030015A CN1564622A CN 1564622 A CN1564622 A CN 1564622A CN 200410030015 CN200410030015 CN 200410030015 CN 200410030015 A CN200410030015 A CN 200410030015A CN 1564622 A CN1564622 A CN 1564622A
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Abstract
The method includes following steps: the available base stations that is relevant to the mobile terminal is tested and scanned; according to a preset rule the available base station are ordered to get priority list for link establishment of base station; the mobile terminal selects in turn the base station in the priority list and tries to establish the link with it, until access to the wireless communication system is successfully made. The method can keep telephone traffics balance between all stations, reduce time of call connection of mobile terminal and increase the succeed ratio of access. The method can be applied in PHS system.
Description
Technical field
The present invention relates to wireless communication field, more precisely, relate to the method for portable terminal selection base station in the wireless communication system.In a kind of preferred implementation, particularly in the air wireless interface part of PHS system (Personal Handset System, personal communication connecting system, Personal Handyphone System system), realize the method for portable terminal selection of the present invention base station.
Background technology
In wireless communication system, it is the RSSI mode that traditional portable terminal is selected the method for base station,, selects the base station of link setup with it in regular turn by signal of base station intensity that is.The RSSI value of base station is the base station down signal strength signal intensity that mobile scanning terminal arrives, and unit is dbuv.Specifically, portable terminal with the base station by signal strength signal intensity (being the RSSI value) from by force to weak arrangement, and select the strong basis station of signal to initiate the link setup request.If suffer the base station refusal because system resource is not enough, portable terminal will select time strong basis station to initiate the link setup request, by that analogy, and until successful or overtime.If link setup is unsuccessful because disturb, portable terminal will be taked to same base station retry, and it is 3 times that maximum reattempt times for example can fixedly install.For example, in the PHS system, according to the STD-28 agreement, maximum 4 times trial chances is enjoyed in each base station, comprises for the first time attempting.
Along with the cordless communication network scale constantly enlarges, the quick growth of number of users.In existing cordless communication network communication system operation process, in the zone of high traffic, intrasystem interference and traffic are unbalanced outstanding apparent outstanding.This is mainly reflected in when portable terminal during to same base station application link setup, because control channel disturbs, portable terminal wastes the plenty of time (for example to be had on the more strongly disturbing base station, in the PHS system 4 times altogether, each 1.2 seconds), this will cause the success rate of portable terminal connecting system to reduce, and the connecting time of connecting system is elongated.In addition, because portable terminal is always preferentially selected the strongest base station of signal, therefore indivedual base stations in high traffic zone become superelevation traffic base station, and some base station call is very low around it, therefore causes traffic unbalanced.
The applying date is on January 19th, 1999, open day is the Chinese patent application CN99101336 " radio phone unit and radio phone base station switching method " (Nippon Electric Company, Ltd.) on September 22nd, 1999, and the applying date is on October 22nd, 2000, open day is the Chinese patent ZL00125747.1 " the wireless user's call control system and the method for base stations in personal handheld phone system " (ZTE Corporation) on May 22nd, 2002, these two patent documentations have all related to the air interface technologies in the wireless telecommunication system, but all do not relate to optimized Algorithm, do not consider the equalizing traffic volume of base station under the various wireless environment situation, the problems such as connecting time of portable terminal connecting system.
Therefore, the wireless technology that needs equalizing traffic volume between a kind of realized base station at existing wireless communication technology field through optimizing.In addition, wish that also this wireless technology can further reduce the time of wireless communication system portable terminal connecting system on the basis of existing technology, and the success rate that improves the portable terminal connecting system.
Summary of the invention
In view of the problems referred to above of the prior art, first purpose of the present invention is to provide a kind of solution of equalizing traffic volume between each base station that can realize in the wireless communication system.
Second purpose of the present invention is to make above-mentioned solution further to reduce the portable terminal access to wireless communication system time.
The 3rd purpose of the present invention is to make above-mentioned solution can also improve the success rate of portable terminal access to wireless communication system.
To achieve these goals, according to a first aspect of the invention, provide a kind of method that is used for realizing at wireless communication system portable terminal selection base station, the method comprising the steps of: the available base stations that detection is relevant with described portable terminal with scanning; According to a predetermined rule available base stations is sorted, so that obtain base station link setup priority list, this portable terminal selects the base station in this base station link setup priority list to attempt with it setting up link successively, up to successfully inserting this wireless communication system.
According to a second aspect of the invention, a kind of portable terminal that uses in wireless communication system is provided, this portable terminal comprises: base station test unit is used for the base station that can use with definite this portable terminal is detected in the base station relevant with this portable terminal when setting up calling; The base station sequencing unit, be used for available base stations being sorted according to predetermined rule, so that obtain base station link setup priority list, this portable terminal selects the base station in this base station link setup priority list to attempt with it setting up link successively, up to successfully inserting this wireless communication system.
According to a third aspect of the invention we, a kind of wireless communication system is provided, this system comprises: portable terminal, at least one base station of getting in touch with portable terminal, the local side apparatus that couples with described base station, and this local side apparatus inserts public telephone network wherein, PSTN for example, wherein, use aforesaid portable terminal to select the base station of link setup with it, connect thereby realize calling out.
Said method of the present invention and mobile terminal device are used in the PHS system in a kind of preferred implementation.
Description of drawings
By the description of carrying out in conjunction with each accompanying drawing, purpose of the present invention, characteristics and benefit thereof will embody clearlyer.In each accompanying drawing:
Fig. 1 is the flow chart that portable terminal is selected the method for base station in wireless communication system of the present invention.
Fig. 2 is the flow chart of an embodiment of as shown in Figure 1 the portable terminal of the present invention method of selecting the base station
Fig. 3 is used to realize that portable terminal of the present invention selects the formation schematic block diagram of portable terminal of the method for base station.
Fig. 4 can realize that portable terminal of the present invention selects the schematic diagram of PHS system of the method for base station.
Embodiment
Fig. 1 is the flow chart that portable terminal is selected the method for base station in wireless communication system of the present invention.As shown in Figure 1, at step S20, portable terminal detects the available base stations in the associated base station.At step S30, moving terminal sorts to detected available base stations according to predetermined rule, sets up available base stations link setup priority list.Then, link according to tabulation of having set up and corresponding base station foundation at step S40.In addition,, can also set a threshold value, will describe in detail hereinafter the number of retries of portable terminal and corresponding base station link setup in order to reach the purpose that reduces portable terminal and base station link setup connecting time.
Introduce several specific embodiments of the method for portable terminal selection base station as shown in Figure 1 below.These embodiment are the portable terminal realized in (wireless environment being had no special requirements) in concrete wireless environment is selected the base station in call establishment methods, among each embodiment and above-mentioned Fig. 1 among the step S30 of method portable terminal to available base stations carry out link setup priority list institute foundation be scheduled to regular corresponding.Wherein, for convenience of description for the purpose of, each following embodiment all is described under the PHS system environments.That is, in the PHS system, select some test points, and in the distribution of selected test point place testing base station signal, thereby the test result of each embodiment is estimated.
＜the first embodiment (1) 〉
At first, relative base station is detected and judged, so that determine the available base stations number by portable terminal.If less than a predetermined threshold value A1, then setting up with corresponding base station according to RSSI mode of the prior art, this available base stations number links.If the available base stations number is more than or equal to this threshold value A 1, then portable terminal is followed the low power base station principle of priority and is set up base station link setup priority list: to the base station of signal strength signal intensity more than or equal to another predetermined threshold B1, preferentially select standby (standby) base station to sort to produce first station list; Sort to produce second station list according to its RSSI value in the base station that signal strength signal intensity is lower than this threshold value B1 then.In the base station of signal strength signal intensity,, then still sort according to separately RSSI value for other base stations that are not standby base station greater than threshold value B1.By first station list and second station list according to first tabulation preceding, second tabulation after mode make up the link setup priority list that obtains all available base stations.Portable terminal is attempted link setup with each base station successively according to this tabulation, links up to successfully setting up with certain base station.In this embodiment, described predetermined threshold value A1 be according to protection when portable terminal is in system when covering weakness access success rate and definite value, for example desirable 2～4; Described threshold value B1 for example can be set at 45dbuv; Number of retries to each base station link setup can be set a threshold value C1 again, and C1 in this embodiment for example desirable 2.At this, low power base station refers to the RP base station that transmitting power is 10mw, 200mw.High-power base station is 500mw.In the code of base station, there is a flag bit to distinguish low power base station and high-power base station.The low power base station priority principle is meant: in different strength ranges, additionally add different biases according to the RSSI value of low power base station, and then participate in station list and arrange.This belongs to the content of prior art, so repeat no more.
Test result to this embodiment is as follows:
CALLING SUCCESS RATE (call through success rate)=96.7%
The average connecting time of each successful call (request+request again)=3.517
Distribution of traffic (traffic is shared degree)=12: 6: 4: 2: 1: 1: 1: 1: 1
Wherein, incident of numeric representation of above-mentioned test parameter " the average connecting time of each successful call " (promptly, begin the link setup request that needs altogether to the link setup success and request number of times again from portable terminal and relevant base station link setup), the pairing time of this parameter is about: (value of this parameter-1) * 1.2s.
＜the second embodiment (2) 〉
At first, relative base station is detected and judged, so that determine the available base stations number by portable terminal.If less than a predetermined threshold value A2, then setting up with the base station according to RSSI mode of the prior art, this available base stations number links.If the available base stations number is more than or equal to this threshold value A 2, then portable terminal is followed the low power base station principle of priority and is set up base station link setup priority list: select from high to low by base station RSSI value, and preferentially select the interior base station of this PA (paging zone) at portable terminal place.Portable terminal is attempted link setup with each base station successively according to this tabulation, links up to successfully setting up with certain base station.In this embodiment, threshold value A 2 can be got 2-4 as among above-mentioned first embodiment; Equally, can set a threshold value C2 again to the number of retries of each base station link setup, C2 in this embodiment for example desirable 1.
Describe in this process preferential this PA of selection.In the PHS system, each portable terminal all can be registered under certain PA (paging zone) in the system, so that called paging is done to it by system.A PA is made up of a lot of base stations usually.This PA is preferential, be meant that the base station signal that will receive under this PA at portable terminal place adds certain putting, and base station signal is constant among other PA, and then carries out corresponding sequencing and handle.Thereby it is preferential to embody this PA base station, avoids location registers.Portable terminal need be done location registers during from a PA to another PA, and the change of reporting system mobile terminal locations is beneficial to called; Location registers meeting occupying system resources is so should avoid too much location registers to take place.As seen, take preferentially to select the strategy of base station among this PA of portable terminal place in the present embodiment, avoided too much location registers to take place, reduce portable terminal and link required time with corresponding base station foundation.Correspondingly, the success rate of portable terminal connecting system also will improve.Simultaneously, because the probability that superelevation traffic base station all appears among the same PA is very little, therefore the mode of this PA at this preferential selection portable terminal place also helps balanced base station call.
Test result to this embodiment is as follows:
CALLING?SUCCESS?RATE＝86.7％
The average connecting time of each successful call (request+request again)=4.077
Distribution?of?traffic＝12∶5∶3∶3∶1∶1∶1
＜the three embodiment (3) 〉
At first, relative base station is detected and judged, and set up according to RSSI mode of the prior art and base station during at the available base stations number and to link less than a predetermined threshold value A3 by portable terminal.If the available base stations number is during more than or equal to this threshold value A 3, portable terminal sorts by its RSSI value from high to low to available base stations, and preferentially selects the base station (CS) of this PA of portable terminal.So obtain the link setup priority list of all available base stations.Portable terminal is attempted link setup according to this tabulation and each base station.In this embodiment, threshold value A 3 can be got 2-4 as among above-mentioned first embodiment; Equally, can set a threshold value C3 again to the number of retries of each base station link setup, C3 in this embodiment for example desirable 3.Note, do not consider the low power base station principle of priority in this embodiment.
Test result to this embodiment is as follows:
CALLING?SUCCESS?RATE＝83.3％
The average connecting time of each successful call (request+request again)=2.923
Distribution?of?traffic＝7∶6∶4∶4∶3∶1
＜the four embodiment (4) 〉
At first, relative base station is detected and judged, and set up according to RSSI mode of the prior art and base station during at the available base stations number and to link less than a predetermined threshold value A4 by portable terminal.If the available base stations number is more than or equal to this predetermined threshold A4, then portable terminal is followed the low power base station principle of priority and is set up base station link setup priority list: from high to low available base stations is sorted to obtain base station link setup priority list by base station RSSI value.Portable terminal is attempted link setup according to this tabulation and each base station.In an embodiment, threshold value A 4 can be got 2-4 as among above-mentioned first embodiment; Equally, can set a threshold value C4 again to the number of retries of each base station link setup, C4 in this embodiment for example desirable 3.
Test result to this embodiment is as follows:
CALLING?SUCCESS?RATE＝73.3％
The average connecting time of each successful call (request+request again)=4.045
Distribution?of?traffic＝7∶5∶3∶2∶1∶1∶1∶1∶1
＜the five embodiment (5) 〉
At first, relative base station is detected and judged, and set up according to RSSI mode of the prior art and base station during at the available base stations number and to link less than a predetermined threshold value A5 by portable terminal.If the available base stations number is during more than or equal to this predetermined threshold value A5, portable terminal is set up available base stations link setup priority list: the available base stations that signal strength signal intensity (being the RSSI value) is higher than another predetermined threshold value B5 sorts at random to form first station list; The available base stations that signal strength signal intensity is lower than this threshold value B5 sorts to form second station list from high to low by its RSSI separately.According to first station list preceding, second station list after mode these two tabulations are made up to form last base station link setup priority list.Portable terminal is attempted link setup according to this tabulation and each base station.In this embodiment, threshold value A 5 can be got 2-4 as among above-mentioned first embodiment; Threshold value B5 for example can be set at 50dbuv; Equally, can set a threshold value C5 again to the number of retries of each base station link setup, C5 in this embodiment for example desirable 1.
Test result to this embodiment is as follows:
CALLING?SUCCESS?RATE＝90％
The average connecting time of each successful call (request+request again)=3.037
Distribution?of?traffic＝9∶5∶4∶3∶2∶1∶1∶1∶1
In above each embodiment, described predetermined threshold value A1-A5 can be according to protection when portable terminal is in system when covering weakness access success rate and definite value, for example desirable 2～4.Certainly, also can select other spans of this threshold value A 1-A5 according to different wireless environments and service request.The relevant threshold value C1-C5 of the number of times of attempting during with portable terminal and each base station link setup can be set between the 0-3, and same, other can realize that the span of each the object of the invention also is feasible.Wherein, value 0 expression portable terminal is 0 time to single base station link setup number of retries.That is, portable terminal is 1 time to total trial link setup number of times of single base station.
The various embodiments described above are compared, obtain following result:
Call through success rate ordering: (1)＞(5)＞(2)＞(3)＞(4)
Connecting time ordering: (3)＜(5)＜(1)＜(4)＜(2)
Traffic is shared the degree ordering: (5)＞(4)＞(1)＞(2)＞(3)
Adopt the representative value of the resulting relevant art effect parameter of method of portable terminal selection base station in the prior art to be: call through success rate: 87%; Connecting time: 3.89; Traffic is shared: 10: 7: 4: 2: 1.By comparing and can find out with the analysis result of the embodiment of the invention described above, portable terminal selects the method for base station to compare in method of the present invention and the prior art, can reach following beneficial effect: the base station call equilibrium; The portable terminal connecting time shortens; Portable terminal is connected success rate and is improved.
As seen, five embodiment have compared with prior art obtained the beneficial effect of expection, still, take all factors into consideration, and the 5th embodiment (5) algorithm effects is best.
According to top introduction to background technology as can be known, the portable terminal connecting time that exists in the prior art long and insert not high defective of success rate and base station call unbalanced getting in touch to a certain degree arranged.Therefore, as mentioned above, primary and foremost purpose of the present invention realizes wireless communication system exactly, for example the equalizing traffic volume of base station in the PHS system.Based on this fact, those skilled in the art can understand, in the foregoing description (1)-(5), if the threshold value A 1-A5 relevant with the access success rate that improves portable terminal is not set and relevant threshold value C1-C5 is (for example with reducing the portable terminal connecting time, can directly use of the prior art 3), and do not carry out the processing procedure relevant with these threshold values, still also can obtain technique effect to the improvement of these two technical indicators, because even these threshold values are not set, the various embodiments described above also can realize the technique effect of balanced base station call, promptly reach primary and foremost purpose of the present invention, therefore also will improve the portable terminal connecting time simultaneously and insert success rate.In addition, in the processing of in the foregoing description 1-2 and 4-5, being sorted in the base station, also can not follow the low power base station principle of priority.
Below in conjunction with Fig. 2 above-mentioned the 5th embodiment is elaborated.
Fig. 2 show of the present invention in wireless communication system (being the PHS system in this embodiment) portable terminal select the flow chart of the 5th embodiment of the method for base station.As shown in Figure 2, at step S100, portable terminal is initiated a calling; At step S110, portable terminal scans and measures all base stations then.At step S130 scanning and measurement result are judged: when available base stations number that mobile scanning terminal arrives less than one be scheduled to numerical value (i.e. threshold value A 5 among this embodiment) time, portable terminal adopts selection base station methods common in the aforesaid prior art (RSSI mode) to select the base station of link setup (step S180) with it, finishes call establishment at step S190 then.This is in order to protect the access success rate when portable terminal is in system's covering weakness.If judge that at step S130 available base stations number that mobile scanning terminal arrives is more than or equal to this threshold value A 5, then at step S140 the RSSI value of base station is judged: the RSSI value is carried out random alignment more than or equal to the base station of a predetermined threshold value (i.e. threshold value B5 among this embodiment) in to available base stations, with the purpose (step S150) that reaches equalizing traffic volume.Because select the algorithm of base station according to above-mentioned common portable terminal, portable terminal is always at first selected the strongest base station of signal, and in the traffic hot spot region, the user has certain concentration degree, and portable terminal will always be selected a certain superelevation traffic base station like this; After taking to select at random, portable terminal will no longer be fixed and select the strongest base station of signal, but select the base station under the certain condition at random satisfying, thereby share the traffic of superelevation traffic base station, realize the purpose of equalizing traffic volume.The available base stations that is lower than this predetermined threshold B5 for the RSSI value is still by its signal strength signal intensity sort from big to small (step S170).So, in the available base stations link setup priority list that in the end obtains, what come the front is to the formation of RSSI numerical value more than or equal to the randomly ordered generation in base station of described threshold value B5, follow the base station that is lower than this predetermined threshold B5 by RSSI numerical value according to its signal strength signal intensity from by force to formation that weak ordering produced.At step S160, the number of attempt of each base station in the base station formation of using the aforesaid way ordering and portable terminal trial link setup is changed into predetermined threshold value C5, thereby reach the purpose that shortens the portable terminal connecting time.Then, flow process realizes call establishment between portable terminal and the corresponding base station at step S190.As mentioned above, also threshold value C5 can be set, and the number of times of portable terminal and corresponding base station link setup uses 3 times commonly used in the prior art.
From above-mentioned 2 descriptions of carrying out in conjunction with the accompanying drawings as can be known, select in this method for optimizing of base station at portable terminal of the present invention, after a calling is initiated, portable terminal just begins to search for the base station that can get in touch, when available base station number was less than the threshold value A 5 that sets in advance, portable terminal connected according to RSSI mode in the above-mentioned prior art, if thereby having to disturb when being connected with a base station causes the link setup failure, portable terminal will repeat to initiate to connect application, retry 3 times.This processing is in order to improve the success rate that portable terminal inserts PHS, especially in particular cases at some, and for example when portable terminal is in system and covers weakness.If available base station number during more than or equal to this threshold value A 5, then carries out next step judgement.When the RSSI value of base station (CS) during more than or equal to pre-set threshold B5, these base stations of random alignment; When the RSSI value of base station (CS) during, available base stations is sorted according to corresponding RSSI value (corresponding to signal of base station intensity) less than this threshold value B5.Obtain the base station link setup priority list that portable terminal will connect with it at last.In the preferred embodiment, carry out randomly orderedly more than or equal to the base station of threshold value B5 for the RSSI value, can avoid traffic to concentrate on certain or certain big base station of several signal strength signal intensities; Simultaneously the RSSI value is sorted according to RSSI value pattern from big to small according to of the prior art less than the base station of this threshold value B5.This sortord had both kept in the prior art for guaranteeing that portable terminal inserts strategy that success rate takes (promptly, according to the RSSI value available base stations is sorted), combine again that the present invention adopted for the balance base station call to the randomly ordered mode in base station, therefore can obtain the beneficial effect of base station call equilibrium, also can improve portable terminal simultaneously and connect success rate.Understand easily, owing to the equilibrium that has realized base station call, the connecting time of portable terminal also can improve, because portable terminal will can (for example superelevation traffic base station) not gone up overspending time link setup in inappropriate base station.Then, portable terminal connects with relevant base station according to this tabulation beginning, if having interference, portable terminal will repeat to initiate to connect application during with a base station chaining, can preestablish threshold value C5 as the number of times of initiating retry.As mentioned above, being provided with of this threshold value C5 mainly is to be used to reduce the connecting time that the successful link setup of portable terminal and base station is spent.
By above-mentioned analysis as seen, this embodiment can realize all purposes of the present invention.In order to describe for simplicity, the analysis of other embodiment is repeated no more, because these analyses it will be apparent to those skilled in the art that.
Above-mentioned portable terminal of the present invention shown in Figure 2 selects that employed each parameter can be by a large amount of field tests acquisitions in the method for base station.Wherein, the span of threshold value A 5 can be 2～4.B5 threshold value span can be＞=50dbuv.From foregoing description as can be known, it is at some in particular cases that threshold value A 5 is set, and for example improves the success rate that portable terminal inserts the PHS system when system covers weakness when portable terminal is in.But, available base stations number and this threshold value A 5 are not compared and directly all available base stations are sorted according to above-mentioned pre-defined rule, also can make portable terminal success connecting system, reach balanced base station call purpose simultaneously.That is, step S130 and S180 are omissible in the flow chart of above-mentioned Fig. 2.In like manner, threshold value C5 is provided with in order to shorten the portable terminal connecting time, and this threshold value can not reach yet and improve the purpose that portable terminal inserts the balanced traffic of success rate and base station.That is, step S160 is omissible in the flow chart of above-mentioned Fig. 2, at this moment can still use 3 number of attempts as portable terminal and each base station link setup of the prior art.Data and analysis result by experiment, the span of this threshold value C5 can be 0～3, and wherein, 0 expression does not have the retry chance, and promptly number of retries is 0.This threshold value C5 is 3 of an available technology adopting before changing.
Mechanism as for the concrete value that realizes each threshold value, can when embedding portable terminal, will be correlated with portable terminal Control Software or control module pre-determine according to specific wireless environment for use, portable terminal perhaps also can be set in above-mentioned Control Software or control module independently select the mechanism of the concrete value of respective threshold, perhaps import the concrete value of respective threshold by the portable terminal user according to the specific wireless environment for use.The specific implementation of these modes is well-known to those skilled in the art, and is not crucial for the realization of method of the present invention, thereby does not repeat them here.
Be used to realize that below in conjunction with Fig. 3 explanation portable terminal of the present invention selects the formation schematic block diagram of portable terminal of the method for base station.
As shown in Figure 3, Reference numeral 1 expression portable terminal, the base station test unit in the Reference numeral 2 expression portable terminals, the base station sequencing unit in the Reference numeral 3 expression portable terminals.When using above-mentioned base station selecting method of the present invention to carry out work, at first can set up the available base stations of link with it by base station test unit 2 detections portable terminal in relevant paging zone.Then, detected available base stations is sorted to produce base station link setup priority list according to predetermined rule by base station sequencing unit 3.At last, make portable terminal 1, select the base station in this tabulation to attempt setting up link with it successively, realize linking, promptly successfully insert the PHS system up to this portable terminal success and certain base station in the tabulation according to determined base station link setup priority list.
Those skilled in the art understand, and the base station of finishing separately under the control of the central control unit 4 that base station test unit 2 and base station sequencing unit 3 can be in portable terminals is detected and the base station ranking function.This control unit 4 is the also realization of other functions of may command portable terminal simultaneously.Certainly, also can realize respectively in base station test unit 1 and base station sequencing unit 3 inside to its operation control and the control unit 4 that do not need to concentrate is controlled their detection and ranking function.Described base station sequencing unit 3 for example can be configured to set up as the base station link setup priority list among the above-mentioned embodiment one to five according to various pre-defined rules.In the present embodiment, above-mentioned each functional unit is software realization accordingly both, for example embeds the corresponding software function module of selecting the base station in the portable terminal Control Software; Also can realize, the relevant hardware functional block for example is installed in portable terminal with hardware commonly known in the art.These are known for a person skilled in the art, and the specific implementation of each functional unit and the present invention are irrelevant, so do not repeat them here.
The PHS system of the method that can realize portable terminal selection of the present invention base station is described below in conjunction with Fig. 4.As shown in Figure 4, PHS of the present invention system mainly comprises portable terminal 1, the base station of getting in touch with portable terminal 5.Though only showing two for the purpose of simplifying the description among Fig. 4 may the base station relevant with portable terminal 1,, when those skilled in the art will appreciate that in actual conditions bid, may also have a plurality of base stations 5 and get in touch with portable terminal 1.Work is carried out in each base station 5 under the control of base station controller (not shown).Base station 5 (and base station controller) couples with local side apparatus 7 by the part of the wireless access in the PHS system, and this local side apparatus 7 inserts existing public telephone network PSTN.In this PHS system, described portable terminal 1 adopts as above in conjunction with the described portable terminal of Fig. 3, thereby when portable terminal made a call, the method for the selection base station of optimization that can be by the invention described above was selected the base station of link setup with it and realized successful link setup.Thereby obtain to improve the success rate of portable terminal access PHS system, the traffic of each base station of balance, and the beneficial effect that reduces the portable terminal connecting time.
Though above-mentioned execution mode mainly illustrates as an example with the PHS system,, portable terminal of the present invention selects the method for base station can be applied to too in other existing wireless communication systems.
The present invention is specifically described above in conjunction with some embodiment of the present invention.But, it will be appreciated by those skilled in the art that the present invention is not limited to above-mentioned specific embodiment and details wherein.In not deviating from principle of the present invention and spiritual scope, can also carry out various improvement and modification to each embodiment.In a word, protection scope of the present invention is only limited by attached claim.
Claims (32)
1, a kind of method that is used for realizing portable terminal selection base station at wireless communication system, the method comprising the steps of:
The available base stations that detection is relevant with described portable terminal with scanning;
According to a predetermined rule available base stations is sorted, so that obtain base station link setup priority list, this portable terminal selects the base station in this base station link setup priority list to attempt with it setting up link successively, so that successfully insert this wireless communication system.
2, the portable terminal of realizing in wireless communication system as claimed in claim 1 is selected the method for base station, wherein, ordering comprises following substep with the step that obtains described base station link setup priority list to described portable terminal to available base stations according to a predetermined rule:
The RSSI value and a first threshold of being scheduled to of each available base stations are compared;
The RSSI value sorted more than or equal to the available base stations of this first threshold obtains first station list, and the RSSI value is sorted less than the available base stations of this first threshold obtains second station list;
This first station list and this second station list are combined to form described base station link setup priority list.
3, the portable terminal of realizing in wireless communication system as claimed in claim 2 is selected the method for base station, wherein, with described first station list and described second station list according to first station list preceding, second station list after sequential combination together to form described base station link setup priority list.
4, select the method for base station as claim 2 or the 3 described portable terminals of in wireless communication system, realizing, wherein, the RSSI value sorted at random more than or equal to the base station of described first threshold obtains described first station list, and RSSI value in the available base stations is sorted according to its RSSI value separately from high to low less than the base station of this first threshold obtains described second station list.
5, select the method for base station as each described portable terminal of realizing among the claim 2-4 in wireless communication system, wherein, the span of described first threshold is＞=50dbuv.
6, select the method for base station as claim 2 or the 3 described portable terminals of in wireless communication system, realizing, wherein, to the base station of RSSI value more than or equal to described first threshold, the preferential standby base station of selecting sorts to produce described first station list, sorts to produce described second station list according to its RSSI value in the base station that signal strength signal intensity is lower than this first threshold.
7, select the method for base station as each described portable terminal of realizing in the claim 2,3 and 6 in wireless communication system, wherein, the span of described first threshold is＞=45dbuv.
8, the portable terminal of realizing in wireless communication system as claimed in claim 1 is selected the method for base station, wherein, ordering comprises following substep with the step that obtains described base station link setup priority list to described portable terminal to available base stations according to a predetermined rule:
From high to low available base stations is sorted by base station RSSI value, and preferentially select the interior base station of this paging zone PA at described portable terminal place, so that set up described base station link setup priority list.
9, select the method for base station as each described portable terminal of in wireless communication system, realizing among the claim 1-8, wherein, when setting up described base station link setup priority list, follow the low power base station principle of priority.
10, the portable terminal of realizing in wireless communication system as claimed in claim 1 is selected the method for base station, wherein, ordering comprises following substep with the step that obtains described base station link setup priority list to described portable terminal to available base stations according to a predetermined rule:
Follow the low power base station principle of priority, from high to low available base stations is sorted, so that obtain described base station link setup priority list by base station RSSI value.
11, select the method for base station as each described portable terminal of in wireless communication system, realizing among the claim 2-10, wherein, one second threshold value is set, when described portable terminal when setting up number of retries when linking according to described base station link setup priority list and corresponding base station greater than this second threshold value, portable terminal abandon selecting with the link setup of this base station with this base station link setup priority list in next base station carry out link setup.
12, the portable terminal of realizing in wireless communication system as claimed in claim 11 is selected the method for base station, and wherein, the span of described second threshold value is 0-3.
13, select the method for base station as each described portable terminal of in wireless communication system, realizing among the claim 2-12, wherein, one the 3rd threshold value is set, with detected available base stations number and the 3rd threshold ratio, if the available base stations number more than or equal to the 3rd threshold value, is then set up described base station link setup priority list according to described pre-defined rule.
14, the portable terminal of realizing in wireless communication system as claimed in claim 13 is selected the method for base station, and wherein, the span of described the 3rd threshold value is 2-4.
15, select the method for base station as each described portable terminal of realizing among the claim 1-14 in wireless communication system, wherein, described wireless communication system is personal communication connecting system PHS.
16, a kind of portable terminal that in wireless communication system, uses, this portable terminal comprises:
Base station test unit is used for the base station that can use with definite this portable terminal is detected in the base station relevant with this portable terminal when setting up calling;
The base station sequencing unit, be used for available base stations being sorted according to predetermined rule, so that obtain base station link setup priority list, this portable terminal selects the base station in this base station link setup priority list to attempt with it setting up link successively, so that successfully insert this wireless communication system.
17, the portable terminal that in wireless communication system, uses as claimed in claim 16, wherein, described base station sequencing unit is configured to perform following operation:
The RSSI value and a first threshold of being scheduled to of each available base stations are compared;
The RSSI value sorted more than or equal to the base station of this first threshold obtains first station list, and RSSI value in the available base stations is sorted less than the base station of this first threshold obtains second station list;
This first station list and this second station list are combined the described base station of formation link setup priority list.
18, the portable terminal that in wireless communication system, uses as claimed in claim 17, wherein, according to described first station list preceding, described second station list after combine in turn to form described base station link setup priority list.
19, as claim 17 or the 18 described portable terminals that in wireless communication system, use, wherein, the RSSI value sorted at random more than or equal to the base station of described first threshold obtains described first station list, and RSSI value in the available base stations is sorted according to separately RSSI value from high to low less than the base station of this first threshold obtains described second station list.
20, as each described portable terminal that uses in wireless communication system among the claim 17-19, wherein, the span of described first threshold is＞=50dbuv.
21, the portable terminal that in wireless communication system, uses as claimed in claim 17, wherein, to the base station of RSSI value more than or equal to described first threshold, the preferential standby base station of selecting sorts to produce described first station list, sorts to produce described second station list according to its RSSI value in the base station that signal strength signal intensity is lower than this first threshold.
22, as each described portable terminal that uses in wireless communication system in the claim 17,18 and 21, wherein, the span of described second threshold value is＞=45dbuv.
23, the portable terminal that in wireless communication system, uses as claimed in claim 17, wherein, described base station sequencing unit is configured to perform following operation:
From high to low available base stations is sorted by base station RSSI value, and preferentially select the interior base station of this paging zone PA at described portable terminal place, so that set up described base station link setup priority list.
24, as the described portable terminal that uses in wireless communication system of claim 16-23, wherein, described base station sequencing unit is followed the low power base station principle of priority and is set up described base station link setup priority list.
25, the portable terminal that in wireless communication system, uses as claimed in claim 17, wherein, described base station sequencing unit is configured to perform following operation:
Follow the low power base station principle of priority, from high to low available base stations is sorted, so that obtain base station link setup priority list by base station RSSI value.
26, as each described portable terminal that in wireless communication system, uses among the claim 17-25, wherein, the one second predetermined threshold value is set, number of retries when described portable terminal is set up with the linking of corresponding base station according to described base station link setup priority list is during greater than this second threshold value, make portable terminal abandon selecting with the link setup of this base station with this base station link setup priority list in next base station carry out link setup.
27, the portable terminal that uses in wireless communication system as claimed in claim 26, wherein, the span of described second threshold value is 0-3.
28, as each described portable terminal that in wireless communication system, uses among the claim 17-27, wherein, one the 3rd predetermined threshold value is set, when the detected available base stations number of described base station test unit during more than or equal to the 3rd threshold value, described base station sequencing unit is set up described base station link setup priority list according to described pre-defined rule.
29, the portable terminal that uses in wireless communication system as claimed in claim 28, wherein, the span of described the 3rd threshold value is 2-4.
30, as the described portable terminal that uses in wireless communication system of claim 16-29, wherein, described wireless communication system is personal communication connecting system PHS.
31, a kind of wireless communication system, this system comprises: portable terminal (1), at least one base station (5) with portable terminal (1) contact, the local side apparatus (7) that couples with described base station, and this local side apparatus (7) inserts fixed network wherein, wherein, use as any one described portable terminal among the above-mentioned claim 16-30 and select the base station of link setup with it, connect thereby realize calling out.
32, wireless communication system as claimed in claim 31, wherein, described wireless communication system is personal communication connecting system PHS, described fixed network is public telephone network PSTN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100300159A CN100373979C (en) | 2004-03-17 | 2004-03-17 | Method of selecting base station of mobile terminal in radio communication system and moble terminal and system for realizing such method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100300159A CN100373979C (en) | 2004-03-17 | 2004-03-17 | Method of selecting base station of mobile terminal in radio communication system and moble terminal and system for realizing such method |
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| Publication Number | Publication Date |
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| CN1564622A true CN1564622A (en) | 2005-01-12 |
| CN100373979C CN100373979C (en) | 2008-03-05 |
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| CNB2004100300159A Expired - Fee Related CN100373979C (en) | 2004-03-17 | 2004-03-17 | Method of selecting base station of mobile terminal in radio communication system and moble terminal and system for realizing such method |
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| CN (1) | CN100373979C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455123C (en) * | 2006-01-23 | 2009-01-21 | 中兴通讯股份有限公司 | A method for improving the access effect of the personal wireless phone system |
| WO2011085546A1 (en) * | 2010-01-13 | 2011-07-21 | 上海贝尔股份有限公司 | Method and device in user terminal for selecting access base station |
| CN102215473A (en) * | 2010-04-09 | 2011-10-12 | 电信科学技术研究院 | Information interaction method, system and device for hierarchical network system |
| CN104427448A (en) * | 2013-08-21 | 2015-03-18 | 鸿合科技有限公司 | Wireless microphone connection method and apparatus, and wireless microphone |
| CN111836322A (en) * | 2019-06-05 | 2020-10-27 | 北京骑胜科技有限公司 | Communication method, device, equipment and medium for sharing equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5577022A (en) * | 1994-11-22 | 1996-11-19 | Qualcomm Incorporated | Pilot signal searching technique for a cellular communications system |
| JPH10322757A (en) * | 1997-05-14 | 1998-12-04 | Toshiba Corp | Radio telephony equipment and control signal capturing method for radio telephony equipment |
| US6055428A (en) * | 1997-07-21 | 2000-04-25 | Qualcomm Incorporated | Method and apparatus for performing soft hand-off in a wireless communication system |
| US6327469B1 (en) * | 1998-12-11 | 2001-12-04 | Motorola, Inc. | Channel scanning method and apparatus |
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- 2004-03-17 CN CNB2004100300159A patent/CN100373979C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455123C (en) * | 2006-01-23 | 2009-01-21 | 中兴通讯股份有限公司 | A method for improving the access effect of the personal wireless phone system |
| WO2011085546A1 (en) * | 2010-01-13 | 2011-07-21 | 上海贝尔股份有限公司 | Method and device in user terminal for selecting access base station |
| CN102577585A (en) * | 2010-01-13 | 2012-07-11 | 上海贝尔股份有限公司 | Method and device in user terminal for selecting access base station |
| CN102215473A (en) * | 2010-04-09 | 2011-10-12 | 电信科学技术研究院 | Information interaction method, system and device for hierarchical network system |
| CN104427448A (en) * | 2013-08-21 | 2015-03-18 | 鸿合科技有限公司 | Wireless microphone connection method and apparatus, and wireless microphone |
| CN111836322A (en) * | 2019-06-05 | 2020-10-27 | 北京骑胜科技有限公司 | Communication method, device, equipment and medium for sharing equipment |
| CN111836322B (en) * | 2019-06-05 | 2023-04-28 | 北京骑胜科技有限公司 | Communication method, device, equipment and medium for sharing equipment |
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| Publication number | Publication date |
|---|---|
| CN100373979C (en) | 2008-03-05 |
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