CN100518309C - Method for distributing frequencies of base stations in personal handheld phone system - Google Patents
Method for distributing frequencies of base stations in personal handheld phone system Download PDFInfo
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- CN100518309C CN100518309C CN 200410091902 CN200410091902A CN100518309C CN 100518309 C CN100518309 C CN 100518309C CN 200410091902 CN200410091902 CN 200410091902 CN 200410091902 A CN200410091902 A CN 200410091902A CN 100518309 C CN100518309 C CN 100518309C
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Abstract
The method includes following steps: saves the available frequency list in upper layer software; when the request for allocating frequency point is received from the upstream link of mobile phone, looks up the frequency list in sequence to find available frequency point; saves the available frequency point having two neighboring available frequency points at its right and left side into first level available list, and saves the available frequency point having one neighboring available frequency point at its right and left side into the second level available frequency list; when making allocation of frequency point, if it can be found in first level available frequency list, then allocates it; if it is not in the first level available frequency list, then searches for it in the second level available frequency list; if it is found in second level frequency list, then allocates it; if it can not be found in the first and second level frequency list, then repeats the looking up process above; if it is still not found, then refuses the request.
Description
Technical field
The present invention relates to the frequency allocation method in the mobile communcations system, relate in particular to the frequency allocation method of base station in PHS (PersonalHandyphone System, the personal handyphone system) system.
Background technology
At present, the Personal Handyphone System(PHS) total number of users of China has had more than 3,000 ten thousand, and will continue to increase.PHS network for various places, the user who bears is also in continuous growth, the network base station number is also in continuous increase, but for honeycomb or micro cellular system, the open ended base station of per unit area number is certain, because for concrete certain network, operational frequency resource is limited, and the base station is overstocked, must cause mutual serious interference.In addition, a large amount of users of conversation simultaneously in the unit are. also can raising because of background noise, cause the increase of mutual interference, if the frequency that particularly a large amount of users distributes concentrates on some continuum, these regional frequency noises are increased, thereby it is unavailable that these regional unallocated frequencies are also become, and the busy reject rate of the frequency of system just rises significantly like this.Therefore, selecting a kind of suitable frequency allocation method just to seem is even more important.
The processing that the frequency allocation method of PHS base station is general all be by bottom hardware by the availability that two-stage RSSI (received signal intensity index) search thresholding guarantees to report the frequency of upper layer software (applications) is set, upper layer software (applications) directly distributes according to the frequency that these report then.
Such distribution method shortcoming is to trust fully the assurance of bottom hardware to frequency availability, upper layer software (applications) does not further process and directly distributes, influence not quite for number of users after a little while, when if customer volume is big, distribute a large amount of adjacent frequencies will raise the noise of regional frequency, it is busy to cause subsequent allocations a large amount of frequencies to occur.
Therefore, upper layer software (applications) provides a kind of effective frequency allocation method just to become urgent problem.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of new PHS method for distributing frequencies of base stations, can reduce the reject rate of PHS base station frequency when busy.
Technical scheme of the present invention is that upper layer software (applications) is preserved the usable frequency table, when receiving that the mobile phone uplink requests is carried out frequency point allocation, distributes in the following manner:
The inner frequency meter of preserving of sequential search, search available frequency,, then this frequency is deposited in the one-level usable frequency table if all there are two available frequencies about this frequency, if all there is an available frequency about this frequency, then this frequency is deposited in the secondary usable frequency table:
At first from one-level usable frequency table, obtain frequency point allocation in proper order when distributing frequency, have then and distribute; If no, search secondary usable frequency table again and obtain in proper order, have then and distribute; Can distribute frequency if all can not find in the I and II frequency meter, then more again according to the inner frequency meter of preserving of the traversal of the order from table 1 to table 2, have available frequency then to distribute, if do not have, refusal distributes the request of frequency.
In the such scheme, search available frequency and be saved in the frequency meter, specifically can be:
The inner frequency meter of preserving of sequential search finds first available frequency;
Continue to search,, obtain an available frequency zone up to finding first unavailable frequency; Check whether exist such center frequency point promptly all to have two available frequencies about this frequency in this available frequency zone,, then this frequency is deposited in the one-level usable frequency table if exist;
Check whether exist such center frequency point promptly all to have an available frequency about this frequency in this zone,, then this frequency is deposited in the secondary usable frequency table if exist;
Begin to repeat above-mentioned four steps from unavailable frequency and continue to seek the firsts and seconds frequency until looking into complete frequency meter.
In the such scheme, the usable frequency table that upper layer software (applications) is preserved obtains with the following methods:
Upper layer software (applications) is downloaded the parameter storage portions from the base station webmaster and is read the usable frequency table when the electrifying startup of base station;
Two frequencies are upwards expanded downwards in border in every section usable frequency zone of frequency meter, if can only expand one then expand one, if can not expand then do not expand;
Frequency meter after the expansion is handed down to bottom hardware;
Bottom hardware is finished the frequency that behind the frequency search search is obtained and is reported upper layer software (applications) according to time slot;
Upper layer software (applications) is filled into frequency and the corresponding received signal intensity index Rssl value that bottom hardware reports in the inner frequency meter of preserving.
Compared with prior art, the present invention has adopted the technology of joining every frequency division to evade phase mutual interference between the frequency as far as possible, thereby reduce as far as possible and adjacently disturb frequently, thereby can reduce the frequency of the PHS system base-station reject rate when busy, all be very helpful for improving base station performance and network performance.
Description of drawings
Figure 1 shows that flow chart of the present invention.
Embodiment
Figure 1 shows that flow chart of the present invention.Suppose the RSSI thresholding that the available frequency of M sheet is judged,
1, from the beginning order travels through whole frequency meter, finds first available frequency P
1(RSSI＜M):
2, from P
1Begin to continue to search available frequency, up to meeting a unavailable frequency Q
1, (till the RSSI＞M), the length in this continuous available frequency zone is N
1If, N
1〉=5, then select frequency with reference to the mode of (1), if N1=3 then selects frequency with reference to the mode of (2):
(1). suppose zone length N
1=7, the zone is as shown in the table, wherein P
1, P
2, P
3, P
4, P
5, P
6Be available frequency, Q
1Be unavailable frequency:
| P 1 | P 2 | P 3 | P 4 | P 5 | P 6 | Q 1 |
P
3, P
4, P
5If for webmaster is downloaded frequency (doing AND-operation with the frequency meter that the webmaster of upper layer software (applications) reservation is downloaded), these frequencies are recorded in the frequency that TABLE1 (available frequency zone length) 5 promptly writes down two available frequencies are respectively arranged about the present position in frequency meter), download frequency if not webmaster, then record: P not
2, if P6 is that webmaster downloads frequency, then deposit to be recorded in TABLE2 (3≤available frequency zone length＜5 promptly write down frequency an available frequency is respectively arranged about the present position) in frequency meter, if not webmaster download frequency, record not then.
(2). suppose zone length N
1=3, the zone is as shown in the table, wherein P
1, P
2, P
3Be available frequency, Q
1Be unavailable frequency:
| P 1 | P 2 | P 3 | Q 1 |
If P
2Download frequency for webmaster, then be recorded among the TABLE2, otherwise record not.
3, from Q
1Begin to search, up to finding next available frequency P
i
4, from P
i, begin to continue to search available frequency, up to meeting next unavailable frequency Q
iTill, the length N in this continuous available frequency zone
2, screen frequency to TABLE1 and TABLE2 according to the processing mode of step 2;
5, repeat the step of 2-4, look into complete frequency meter;
6, according to the order of TABLE2 behind first TABLE1 frequency of picked at random therefrom, if neither one can be used frequency in two tables, jump to 9, otherwise to 7;
7, judge this frequency whether be aerial identical time slot use (be among the 1C7T, 1 time slot and 4 time slots, 2 time slots and 5 time slots ...), if different, then jump to 8, otherwise get back to 6, choose again;
8, select available frequency, distribute this frequency;
9, the frequency meter of search step 1 again finds K frequency that satisfies " webmaster distribution " simultaneously to leave TABLE3 in according to the strategy of existing " frequency-selecting of two-stage RSSI thresholding ", and one of picked at random if aerial identical time slot does not use, then jumps to 8; If K frequency is all unavailable, then jump to 10; (the wherein selection of K, because terminal is after the link assignment failure first time, 3 links of maximum possible are asked again, so the value of K is 〉=3.)
10, frequency is busy, and the refusal request is returned.
Claims (3)
1, a kind of method for distributing frequencies of base stations in personal handheld phone system, upper layer software (applications) is preserved the usable frequency table, it is characterized in that, when receiving that the mobile phone uplink requests is carried out frequency point allocation, distributes in the following manner:
1.1 the inner frequency meter of preserving of sequential search, search available frequency,, then this frequency is deposited in the one-level usable frequency table if all there are two available frequencies about this frequency, if all there is an available frequency about this frequency, then this frequency is deposited in the secondary usable frequency table;
1.2 at first from one-level usable frequency table, obtain frequency point allocation in proper order when distributing frequency, have then and distribute; If no, search secondary usable frequency table again and obtain in proper order, have then and distribute; Can distribute frequency if all can not find in the I and II frequency meter, then more again according to the inner frequency meter of preserving of the traversal of the order from table 1 to table 2, have available frequency then to distribute, if do not have, refusal distributes the request of frequency.
2, the described method for distributing frequencies of base stations in personal handheld phone system of claim 1 is characterized in that, the usable frequency table that upper layer software (applications) is preserved obtains with the following methods:
2.1 upper layer software (applications) is downloaded the parameter storage portions from the base station webmaster and is read the usable frequency table when the electrifying startup of base station;
2.2 two frequencies are upwards expanded downwards in the border in every section usable frequency zone of frequency meter, if can only expand one then expand one, if can not expand then do not expand;
2.3 the frequency meter after will expanding is handed down to bottom hardware;
2.4 bottom hardware is finished the frequency that behind the frequency search search is obtained and is reported upper layer software (applications) according to time slot;
2.5 upper layer software (applications) is filled into frequency and the corresponding received signal intensity index value that bottom hardware reports in the inner frequency meter of preserving.
3, the described method for distributing frequencies of base stations in personal handheld phone system of claim 1 is characterized in that step 1.1 is further comprising the steps of:
1.11 the inner frequency meter of preserving of sequential search finds first available frequency;
1.12 continue to search,, obtain an available frequency zone up to finding first unavailable frequency;
1.13 check whether exist such center frequency point promptly all to have two available frequencies about this frequency in this available frequency zone,, then this frequency deposited in the one-level usable frequency table if exist;
1.14 check whether exist such center frequency point promptly all to have an available frequency about this frequency in this zone,, then this frequency deposited in the secondary usable frequency table if exist;
Continue to seek the firsts and seconds frequency until looking into complete frequency meter 1.15 begin to repeat above-mentioned four steps from unavailable frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410091902 CN100518309C (en) | 2004-12-28 | 2004-12-28 | Method for distributing frequencies of base stations in personal handheld phone system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410091902 CN100518309C (en) | 2004-12-28 | 2004-12-28 | Method for distributing frequencies of base stations in personal handheld phone system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1798336A CN1798336A (en) | 2006-07-05 |
| CN100518309C true CN100518309C (en) | 2009-07-22 |
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ID=36819039
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410091902 Expired - Fee Related CN100518309C (en) | 2004-12-28 | 2004-12-28 | Method for distributing frequencies of base stations in personal handheld phone system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100518309C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112383930B (en) * | 2020-11-12 | 2022-06-21 | 东方通信股份有限公司 | Method for distributing same-frequency simulcasting carrier |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075237A (en) * | 1992-02-06 | 1993-08-11 | 莫托罗拉公司 | Public frequency in a plurality of radio telephone systems |
| US5719868A (en) * | 1995-10-05 | 1998-02-17 | Rockwell International | Dynamic distributed, multi-channel time division multiple access slot assignment method for a network of nodes |
| JP2000209662A (en) * | 1999-01-09 | 2000-07-28 | Nec Corp | Mobile telephone set |
| CN1358937A (en) * | 2000-12-18 | 2002-07-17 | 山田株式会社 | Restarting device of pump |
-
2004
- 2004-12-28 CN CN 200410091902 patent/CN100518309C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075237A (en) * | 1992-02-06 | 1993-08-11 | 莫托罗拉公司 | Public frequency in a plurality of radio telephone systems |
| US5719868A (en) * | 1995-10-05 | 1998-02-17 | Rockwell International | Dynamic distributed, multi-channel time division multiple access slot assignment method for a network of nodes |
| JP2000209662A (en) * | 1999-01-09 | 2000-07-28 | Nec Corp | Mobile telephone set |
| US6662025B1 (en) * | 1999-01-09 | 2003-12-09 | Nec Corporation | Mobil phone with adaptive user interface |
| CN1358937A (en) * | 2000-12-18 | 2002-07-17 | 山田株式会社 | Restarting device of pump |
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| Publication number | Publication date |
|---|---|
| CN1798336A (en) | 2006-07-05 |
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