CN1842200A - Frequency selection method and apparatus - Google Patents
Frequency selection method and apparatus Download PDFInfo
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- CN1842200A CN1842200A CNA2005100247344A CN200510024734A CN1842200A CN 1842200 A CN1842200 A CN 1842200A CN A2005100247344 A CNA2005100247344 A CN A2005100247344A CN 200510024734 A CN200510024734 A CN 200510024734A CN 1842200 A CN1842200 A CN 1842200A
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Abstract
The invention discloses a method for choosing the frequency in the wireless communicating system which comprises the following steps: quoting whether the candidate frequency assembles comprises the frequency for supporting all of the acting business when a candidate frequency assembles chooses the frequency; if not, expending the candidate frequency assembles and the current chooses the suitable frequency. It also provides a corresponding choosing frequency device and its including user end.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of frequency selecting method and device.
Background technology
Supporting for example multimedia broadcast multi-broadcasting business (Multimedia Broadcast MulticastService, MBMS) etc. in the wireless communication system of and so on business, having three kinds of technology may cause subscriber equipment (UE) to carry out the alien-frequency district gravity treatment among the multimedia broadcast multi-broadcasting business MBMS (Multimedia Broadcast Multicast Services), is respectively frequency layer scattering and frequency layer convergence and non-MBMS traffic limits.The reason that adopts these preceding two kinds of technology is because each MBMS business can send on a plurality of frequencies simultaneously, and the content on each frequency all is the same, and this just feasible reception user on a plurality of frequencies is converged on the frequency becomes possibility.The frequency layer convergence technology has been saved Radio Resource greatly, has improved the availability of frequency spectrum of MBMS business.The business of a kind of broadcast nature that MBMS provides, such business can be supported than other such as the much more user of interactive service on a frequency.But the capacity of a frequency but is very limited for the business of other types, so after the MBMS service ending, if the user on this frequency initiates the business of other types, system just can't support, thereby cause congested.The frequency layer scattering technology is an opposite process.The frequency layer scattering technology is exactly to be distributed to technology on other frequency the user that will converge behind the MBMS conversation end.For certain specific transactions, these two kinds of technology are can be not overlapping in time.But when the user receives a plurality of MBMS when professional simultaneously, overlapped phenomenon may appear in different business, and UE will be because of the relevant signaling that can't determine to carry out which kind of business, and the contradiction that the frequency of occurrences is selected, may bring loss of data, and may emphasis network signaling burden.This contradiction need solve by protocol specification.In addition after the user converges on certain frequency, these users may initiate non-MBMS business simultaneously, like this in the MBMS business is carried out, also may cause the congested of this frequency, therefore in this case, network shows that to UE non-MBMS business is restricted at current frequency, and promptly this frequency is not supported non-MBMS business at present.
Explain further with regard to the contradiction between the different signalings that below as shown, UE receives three kinds of MBMS business simultaneously, these three kinds of business may be distributed on 4 frequencies.Professional 1 frequency is (1,2,3), and professional 2 frequency is (1,3,4), and professional 3 frequency is (2,3,4), and in order to guarantee to receive all business simultaneously, UE has selected frequency 3.After professional 3 end, UE receives only professional 1 and 2.Can guarantee that professional 1 and 2 frequencies that receive simultaneously are (1,3), but after professional 3 end, network can send frequency layer scattering message, therefore UE may choose on other frequencies, and these frequencies may not guarantee professional 1 and 2 normal reception.Professional 1 and 2 frequency layer convergence information requirements UE goes up in frequency (1,3) and selects frequency simultaneously.UE will face the contradiction that frequency is selected.If UE switches to frequency 1, may cause the business 1 that receiving and 2 loss of data.If switch on the frequency 2, can cause professional 1 can't normally receive.
Another kind of situation as shown, UE can't receive all business simultaneously.Originally UE receives business 1 and business 2 at frequency 1, and owing to professional 3 priority is higher, after business 3 arrived, UE had selected frequency 3 receptions, and UE can only receive business 3 and business 1 simultaneously like this.After professional 3 end, UE just can receive remaining business (professional 1 and professional 2) on frequency 1 or frequency 2, at this moment just need consider the frequency layer scattering indication when UE carries out the alien-frequency district gravity treatment, selects frequency 1.This also requires comprehensive consideration frequency layer convergence and frequency layer scattering.
At present 3GPP is formulating the agreement of frequency layer scattering, does not also have standard or motion analysis and solves a plurality of business and deposit situation lower frequency layer and converge selection problem with frequency layer scattering.The contradiction that present technology may bring frequency to select, thus loss of data caused, in addition service disconnection, have a strong impact on service quality, bring unnecessary signaling consumption.
Summary of the invention
The objective of the invention is to take all factors into consideration the signaling that may cause frequency re-selections, the assurance of maximum possible receives business as much as possible simultaneously, further reduces the influence of alien-frequency district gravity treatment to business.
To achieve these goals, the present invention proposes a kind of method of in wireless communication system, selecting frequency, when described method comprises the steps: in an initial candidate frequency set to select frequency, judge whether described Candidate Frequency collection comprises the frequency of supporting current all activated business; If described Candidate Frequency collection does not comprise the frequency that can support current all activated business, then expand described Candidate Frequency collection; And in the suitable frequency of the concentrated selection of current Candidate Frequency.
Preferably, before described determining step, also comprise the steps: to receive the signal that may cause frequency re-selections; And determine described initial candidate frequency set according to the signal that is received.
Preferably, further comprise the step of not supporting the frequency of current activating service from the concentrated filtering of current Candidate Frequency before the step of described selection frequency.
Preferably, the step of described selection frequency preferentially is chosen in the frequency of using before the presently used frequency.
Preferably, the described signal of frequency re-selections that may cause comprises frequency layer scattering information, frequency layer convergence information or non-multimedia multicast broadcasting service restricted information.
Preferably, when the signal that is received comprised frequency layer convergence information, the initial candidate frequency set was set to comprise the union of each professional frequency of using; When the signal that is received comprised frequency layer scattering information, the initial candidate frequency set was set to comprise the frequency of using before the frequency layer convergence; And work as the signal that is received when comprising non-multimedia multicast broadcasting service restricted information, the initial candidate frequency set is set to all usable frequencies.
Preferably, described spread step expands to all usable frequencies to current Candidate Frequency collection.
The present invention also provides a kind of equipment of selecting frequency in wireless communication system, and described equipment comprises as lower device: storage device is used to store the Candidate Frequency collection; Judgment means is used for when the storage Candidate Frequency concentrate to be selected frequency, judges whether described Candidate Frequency collection comprises the frequency of supporting current all activated business; Expanding unit is used for expanding described Candidate Frequency collection when described judgment means judges that described Candidate Frequency collection does not comprise the frequency that can support current all activated business; And choice device, be used for concentrating the suitable frequency of selection at current Candidate Frequency.
According to technical scheme of the present invention, reduced the possibility of loss of data, receive all business to greatest extent, improved service quality; Solved the conflicting problem between the relevant frequency layer gravity treatment signaling; Reduce the possibility of the potential network congestion on optimized frequency layer.
Description of drawings
By below in conjunction with the description of the drawings, and along with understanding more comprehensively to of the present invention, other purpose of the present invention and effect will become clear more and easy to understand, wherein:
Fig. 1 illustrates the schematic diagram that frequency layer is selected first kind of situation may occurring;
Fig. 2 illustrates the schematic diagram that frequency layer is selected second kind of situation may occurring;
Fig. 3 illustrates the schematic diagram according to extension frequency layer scattering Candidate Set of the present invention;
Fig. 4 illustrates the flow chart according to the principle of frequency selecting method of the present invention;
Fig. 5 illustrates the flow chart of frequency selecting method according to an embodiment of the invention;
Fig. 6 illustrates the particular flow sheet of the professional Candidate Frequency collection of the non-MBMS pre-treatment step among Fig. 5; And
Fig. 7 illustrates a kind of equipment of selecting frequency in wireless communication system according to preferred implementation of the present invention.
Embodiment
Fig. 3 illustrates the schematic diagram according to the extended method of frequency layer scattering Candidate Set of the present invention.As shown in Figure 3, according to principle of the present invention, subscriber equipment can be expanded Candidate Frequency and be selected after receiving the frequency layer scattering indication that network sends as the case may be, the step of expansion can comprise two stages, the frequency of using before promptly from the frequency expansion of current use to frequency layer convergence adds the frequency of work at present, and can also expand to whole available frequencies more as required.
Below with reference to Fig. 4, the principle according to frequency selecting method of the present invention is described.
As shown in Figure 4, in step S401, subscriber equipment receives the signal that may cause frequency re-selections.In the MBMS system, this signal can be the signals such as frequency layer scattering indication that send to subscriber equipment from network.Then enter step S402.In step S402, initial Candidate Frequency collection is set according to the signal that is received.This initial candidate frequency set changes according to the signal that is received.Then enter step S403.
Judge the current business that whether has activation at step S403.When this step S403 judges when not having activation professional, owing to do not need to expanding current Candidate Frequency collection according to the business that activates.Therefore, directly forward step S407 to, concentrate at current Candidate Frequency and select suitable frequency.When this step S403 judges that when not having activation professional, execution in step S404 judges whether current frequency set exists the frequency of supporting all activated business.
When in step S404, judging that there is the frequency of supporting all activated business in current frequency set, do not need to carry out frequency expansion, therefore directly forward step S407 to, concentrate at current Candidate Frequency and select suitable frequency, and finish whole flow process.If judge that in step S404 execution in step S405 was according to the signal extension Candidate Frequency collection that causes frequency re-selections that is received at step S401 when there was not the frequency of supporting all activated business in current frequency set.The frequency of using before as shown in Figure 3 can be from the frequency expansion of current use to frequency layer convergence adds the frequency of work at present, and also can expand to whole available frequencies.
Then, in step S406, from the frequency set after the expansion, remove the frequency of not supporting current business, dwindle the Candidate Frequency collection after the expansion, so that follow-up selection.In step S407, concentrate the suitable frequency of selection then, and finish whole frequency re-selections and handle at remaining Candidate Frequency.
Below with reference to Fig. 5, be that example is described a specific embodiment according to frequency selecting method of the present invention with the MBMS system, wherein Fig. 5 is specializing of Fig. 4.
User equipment (UE) is received the information that may cause frequency re-selections relevant with MBMS in preferred embodiment shown in Figure 5, and this information can comprise MBMS frequency layer scattering information, MBMS frequency layer convergence information and/or non-MBMS traffic limits information.Note that this information can comprise above-mentioned two or more information, and be not limited to three kinds of given information.
After receiving the information that may cause frequency re-selections, execution in step S501 determines the initial candidate frequency set according to received information.Specifically, if receive and comprise frequency layer convergence information in the information, then the initial candidate frequency set is set to the union of the frequency layer of each MBMS business; If comprise frequency layer scattering message in the information that receives, then the initial candidate frequency set is made as to comprise and carries out the frequency that frequency layer convergence used and stored; If comprise non-MBMS traffic limits information in the information that receives, then the initial candidate frequency set be made as all usable frequencies.When the information that is received comprised above-mentioned two or more information, the initial candidate frequency set was set to the union of the Candidate Frequency collection corresponding with the information that is received.
Execution in step S502 after step S501 is set judges the current business that whether has activation, comprises the professional and non-MBMS business of MBMS.If the business that exist to activate then enter next procedure S503; The if there is no business of Ji Huoing, show that then current business finishes dealing with, the information that is received only is frequency layer scattering information, then can carry out frequency layer scattering immediately, directly enter step S518, concentrate the suitable frequency of selection at current Candidate Frequency, at this moment current Candidate Frequency collection is the frequency that frequency layer convergence uses before, therefore have only a selection, promptly select the frequency of using before the frequency layer convergence.
Judge in step S503 whether the information that receives comprises frequency layer scattering information.If be "Yes", then enter step S504.
In step S504, if the frequency before converging can not support all professional or current frequencies to support all activated business, the information of used frequency before then storing this frequency layer scattering information and converging is in order to using in the future.Because the business that current existence activates, the frequency layer scattering operation can not be carried out immediately, and can only store this frequency layer scattering information, in the future suitable, carry out the indication of this information.Execution in step S505 after step S504.
Judge at step S505 whether current frequency supports all activated business.If support all activated business, then finish this handling process.Otherwise enter step S506.
In step S506, enter the professional Candidate Frequency set of non-MBMS preliminary treatment process, in this preliminary treatment process, the Candidate Frequency collection is screened, to dwindle range of choice.Concrete handling process as shown in Figure 6, this will be described in more detail below.Follow execution in step S507.
In step S507, judge whether to exist in the current Candidate Frequency set and support all professional frequencies.Support all professional frequencies if exist, then enter step S516, concentrate at current Candidate Frequency and select suitable frequency; Otherwise enter step S508.
In step S508, the Candidate Frequency set is expanded to all usable frequencies, thereby enlarge range of choice.Then enter step S509.
The professional Candidate Frequency of non-MBMS shown in the execution graph 6 is gathered the preliminary treatment process once more in step S509.Then enter step S510.
In step S510, judge the concentrated frequency of supporting all MBMS business that whether exists of current Candidate Frequency.If there is the frequency of all MBMS business of support, then enter step S516, concentrate at current Candidate Frequency and select suitable frequency; Otherwise enter step S511.
In step S511, sort according to priority each business of inferior ordered pair from high to low.If a plurality of business are arranged on certain priority, and the frequency layer of these vocational works is incomplete same, then Access Layer need ask Non-Access Stratum to carry out the priority division.At first select the highest business of priority to carry out follow-up processing.Enter step S512.
In step S512, judge whether the Candidate Frequency set exists this professional frequency of support.If there is no support the frequency that this is professional, then enter step S516; Otherwise enter step S513.
At step S513, substep filters out the frequency of not supporting that this is professional from the Candidate Frequency set, to dwindle the scope that frequency is selected.Enter step S514.
At step S514, judge whether that all business are all carried out frequency screening to be handled, if finish all professional frequency screening, then finishes whole flow process; Otherwise enter step S515.
Among the step S515, choose the business of next stage priority, enter step S512, proceed frequency screening.
In step S516, judge whether the Candidate Frequency set comprises the frequency of using before the frequency layer convergence.Enter step S519 if comprise, select the frequency of using before the frequency layer convergence; Otherwise enter step S517.
At step S517, from current Candidate Frequency set, filter out the frequency that all do not support current selected each activating service, and enter step S518.Current selected each activating service at this indication is each business of once selecting among the step S515.Then enter step S518.
In step S518, carry out the sub-district gravity treatment according to the Candidate Frequency set after filtering, finish the entire process flow process then.
Be described in detail in the professional Candidate Frequency collection of the non-MBMS preliminary treatment process of carrying out among the step S506 of Fig. 5 and the S509 below with reference to Fig. 6.
Execution in step S601 at first judges whether to exist the non-MBMS business of activation.If have the non-MBMS business that activates, enter step S602, otherwise finish this preliminary treatment process.
At step S602, the Candidate Frequency collection is expanded to all usable frequencies.Then enter step S603.
At step S603, judge whether network has indicated the MBMS frequency not support non-MBMS business, and the priority of non-MBMS business is higher than the MBMS business.If be judged as very, enter step S604, otherwise finish this preliminary treatment process.
At step S604, the MBMS frequency concentrated from current Candidate Frequency remove, dwindling the scope that frequency is selected, and finish this preliminary treatment process.
Fig. 5 and 6 handling process are to be the specific embodiment that example describes with the MBMS system, but the invention is not restricted to this embodiment, those of ordinary skills obviously also can select the frequency that thought of the present invention is applied in other communication systems to handle, and do not depart from the scope of the present invention.
Fig. 7 illustrates a kind of equipment of selecting frequency in wireless communication system according to preferred implementation of the present invention.
As shown in the figure, this equipment comprises storage device 71, is used to store Candidate Frequency collection and the previous frequency of using; Setting device 72 is used for according to the information that may cause frequency re-selections that is received the initial candidate frequency set being set; Judgment means 73 is used for when concentrate selecting frequency by storage device 71 Candidate Frequency of storing, and judges whether described Candidate Frequency collection comprises the frequency of supporting current all activated business; Expanding unit 74 is used for expanding described Candidate Frequency collection when described judgment means judges that described Candidate Frequency collection does not comprise the frequency that can support current all activated business; Filter 75 is used for concentrating filtering not support the frequency of current activating service from current Candidate Frequency; And choice device 76, be used for concentrating the suitable frequency of selection at current Candidate Frequency.
If concentrating, current Candidate Frequency comprises the frequency of using before the presently used frequency, the frequency of use before then choice device 76 preferentially is chosen in when selecting frequency.
In the MBMS system, the described signal of frequency re-selections that may cause comprises frequency layer scattering information, frequency layer convergence information or non-multimedia multicast broadcasting service restricted information.When the signal that is received comprised frequency layer convergence information, described setting device 72 initial candidate frequency sets were set to comprise the union of each professional frequency of using; When the signal that is received comprised frequency layer scattering information, described setting device 72 initial candidate frequency sets were set to comprise the frequency of using before the frequency layer convergence; And work as the signal that is received when comprising non-multimedia multicast broadcasting service restricted information, described setting device 72 initial candidate frequency sets are set to all usable frequencies.
Do not break away from design of the present invention and scope and can make many other changes and remodeling.Should be appreciated that to the invention is not restricted to specific execution mode, scope of the present invention is defined by the following claims.
Claims (14)
1. method of selecting frequency in wireless communication system, described method comprises the steps:
When in an initial candidate frequency set, selecting frequency, judge whether described Candidate Frequency collection comprises the frequency of supporting current all activated business;
If described Candidate Frequency collection does not comprise the frequency that can support current all activated business, then expand described Candidate Frequency collection; And
Concentrate the suitable frequency of selection at current Candidate Frequency.
2. method according to claim 1 wherein also comprised the steps: before described determining step
Reception may cause the signal of frequency re-selections; And
Determine described initial candidate frequency set according to the signal that is received.
3. further comprising before the method according to claim 1, the step of wherein said selection frequency from current Candidate Frequency concentrates filtering not support the step of the frequency of current activating service.
4. according to claim 1 or 3 described methods, the step of wherein said selection frequency preferentially is chosen in the frequency of using before the presently used frequency.
5. method according to claim 2, the wherein said signal of frequency re-selections that may cause comprises frequency layer scattering information, frequency layer convergence information or non-multimedia multicast broadcasting service restricted information.
6. method according to claim 5, wherein:
When the signal that is received comprised frequency layer convergence information, the initial candidate frequency set was set to comprise the union of each professional frequency of using;
When the signal that is received comprised frequency layer scattering information, the initial candidate frequency set was set to comprise the frequency of using before the frequency layer convergence; And
When the signal that is received comprised non-multimedia multicast broadcasting service restricted information, the initial candidate frequency set was set to all usable frequencies.
7. method according to claim 1, wherein said spread step expands to all usable frequencies to current Candidate Frequency collection.
8. equipment of in wireless communication system, selecting frequency, described equipment comprises as lower device:
Storage device is used to store the Candidate Frequency collection;
Judgment means is used for when the storage Candidate Frequency concentrate to be selected frequency, judges whether described Candidate Frequency collection comprises the frequency of supporting current all activated business;
Expanding unit is used for expanding described Candidate Frequency collection when described judgment means judges that described Candidate Frequency collection does not comprise the frequency that can support current all activated business; And
Choice device is used for concentrating the suitable frequency of selection at current Candidate Frequency.
9. equipment according to claim 8 wherein also comprises as lower device:
Setting device is used for according to the signal that may cause frequency re-selections that receives described initial candidate frequency set being set.
10. equipment according to claim 8 wherein also comprises filter, is used for concentrating filtering not support the frequency of current activating service from current Candidate Frequency.
11. according to Claim 8 or 10 described equipment, wherein said choice device preferentially is chosen in the frequency of using before the presently used frequency.
12. equipment according to claim 9, the wherein said signal of frequency re-selections that may cause comprises frequency layer scattering information, frequency layer convergence information or non-multimedia multicast broadcasting service restricted information.
13. equipment according to claim 12, wherein:
When the signal that is received comprised frequency layer convergence information, described setting device initial candidate frequency set was set to comprise the union of each professional frequency of using;
When the signal that is received comprised frequency layer scattering information, described setting device initial candidate frequency set was set to comprise the frequency of using before the frequency layer convergence; And
When the signal that is received comprised non-multimedia multicast broadcasting service restricted information, described setting device initial candidate frequency set was set to all usable frequencies.
14. the user terminal in the wireless communication system, wherein said user terminal comprises according to Claim 8 the equipment of each described selection frequency in-13.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100247344A CN100452920C (en) | 2005-03-29 | 2005-03-29 | Frequency selection method and apparatus |
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| CNB2005100247344A CN100452920C (en) | 2005-03-29 | 2005-03-29 | Frequency selection method and apparatus |
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| CN1842200A true CN1842200A (en) | 2006-10-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107258103A (en) * | 2015-02-23 | 2017-10-17 | 高通股份有限公司 | The technology of conflict rule during for solving measurement cellular cell for gravity treatment |
| CN110620626A (en) * | 2019-09-29 | 2019-12-27 | 广州海格通信集团股份有限公司 | Automatic frequency selection method and device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5740534A (en) * | 1996-02-22 | 1998-04-14 | Motorola, Inc. | Method for determining available frequencies in selective call receivers |
| FI105639B (en) * | 1997-06-25 | 2000-09-15 | Nokia Mobile Phones Ltd | An improved method for cell switching |
| US5999522A (en) * | 1997-11-26 | 1999-12-07 | Motorola, Inc. | Method and apparatus for determining hand-off candidates in a communication system |
| US6725052B1 (en) * | 1999-12-20 | 2004-04-20 | Ericsson Inc. | Cell assignment method during group calls |
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2005
- 2005-03-29 CN CNB2005100247344A patent/CN100452920C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107258103A (en) * | 2015-02-23 | 2017-10-17 | 高通股份有限公司 | The technology of conflict rule during for solving measurement cellular cell for gravity treatment |
| CN107258103B (en) * | 2015-02-23 | 2019-01-11 | 高通股份有限公司 | For solving the method and equipment of conflict rule of the measurement cellular cell for gravity treatment when |
| CN110620626A (en) * | 2019-09-29 | 2019-12-27 | 广州海格通信集团股份有限公司 | Automatic frequency selection method and device |
| CN110620626B (en) * | 2019-09-29 | 2022-03-11 | 广州海格通信集团股份有限公司 | Automatic frequency selection method and device |
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| CN100452920C (en) | 2009-01-14 |
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