CN101047954A - Method for call setting request in PHS network - Google Patents
Method for call setting request in PHS network Download PDFInfo
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- CN101047954A CN101047954A CNA2006100663289A CN200610066328A CN101047954A CN 101047954 A CN101047954 A CN 101047954A CN A2006100663289 A CNA2006100663289 A CN A2006100663289A CN 200610066328 A CN200610066328 A CN 200610066328A CN 101047954 A CN101047954 A CN 101047954A
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Abstract
This invention discloses a method for reducing re-requesting generation rate of PHS network including: 1, a cell phone searches for carrier frequencies of various time slots of its side to get interference situations of each carrier frequency, 2, the cell phone sends information to a base station including interference states of the carier frequencies of time slots of the cell phone, 3, the base station determines the best frequency of an idle time slot and sends information to it including the optimum carier frequency of the idle slot, 4, the cell phone synchronizes with the base station, if it is successfully, step 5 is executed, if it fails, it returns to step 2, 5, the link between the cell phone and the station is successful and the process is ended.
Description
Technical field
The present invention relates to the resource allocation methods in the mobile communcations system, relate in particular to resource allocation methods in PHS (Personal HandyphoneSystem, the personal handyphone system) system.
Background technology
At present, Zhong Guo Personal Handyphone System(PHS) total number of users constantly increases.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 make these regional unallocated frequencies also become unavailable, the link establishment of mobile phone asks incidence just to rise significantly more like this, cause the connecting time of mobile phone to increase greatly, network performance is affected, thus link establishment to ask incidence again be the important indicator that Virtual network operator is investigated network performance.
It is that Resources allocation after the request for building link of mobile phone is received in the base station that the link establishment of PHS mobile phone is asked again, indicate to the link assignment that mobile phone issues, this Indication message carries base station institute's distributed time slot and carrier frequency, mobile phone receive after this message by and the synchronous burst of base station transceiver (Synchronization Burst) and TCH idle (Traffic Channel idle frame) carry out TCH activation, as shown in Figure 1; If the failure of TCH activation, then mobile phone is asked to base station transmission link establishment again, as shown in Figure 2; Wherein the immediate cause of TCH activation failure is exactly that the carrier frequency that distributes of base station exists and disturbs, and it is incorrect or unstable to cause receiving and dispatching sequential, will guarantee that therefore base station institute's distributed time slot and carrier frequency are just directly depended in the success of TCH activation.
The processing that the time slot of PHS base station and carrier distribution method are general all is to carry out carrier search at one's leisure on the crack by the base station promptly to obtain aerial receiving slot RSSI (incoming level value) on as shown in Figure 3 certain carrier frequency, can obtain the RSSI value of a plurality of carrier frequency on each time slot.The base station selects time slot and carrier frequency to distribute according to certain strategy when receiving the request for building link of mobile phone.
A kind of method that also has in addition as shown in Figure 2 is the RSSI value that the base station not only obtains aerial receiving slot when carrying out carrier search, also obtains aerial sending time slots RSSI value simultaneously, and comprehensively the two determines the carrier frequency of distribution.
Such distribution method all is to determine the carrier frequency availability by the CF signal of base stations detected side, the CF signal situation that can't truly reflect each time slot of mobile phone side reduces link establishment by the improvement algorithm and asks relatively difficulty of incidence again under this strategy.
Summary of the invention
At defective that exists in the prior art and deficiency, the invention provides the method for setup requests in a kind of PHS network that utilizes the CF signal situation that mobile phone reports each time slot of mobile phone side.
The method of setup requests in a kind of PHS network may further comprise the steps:
(1) mobile phone is under holding state, and each carrier frequency of each time slot of adversary's pusher side is searched for, and obtains each carrier frequency disturbed condition;
(2) mobile phone is in caller off-hook dialing or called when receiving beep-page message, described mobile phone sends request for building link message (Link channel establishment request) to the base station, and described request for building link message comprises each carrier frequency disturbed condition of each time slot of mobile phone side.
(3) base station is according to each carrier frequency disturbed condition of each time slot of mobile phone side, and the time slot and the carrier frequency situation of base station itself, determine the optimum carrier frequency of an idle time slot, and to mobile phone transmission link assignment message (Link channel assignment), described link assignment message comprises the optimum carrier frequency of above-mentioned idle time slot;
(4) mobile phone and base station synchronization success, step finishes; Synchronization failure then continues following steps;
(5) mobile phone sends link establishment request message (Link channel establishment rerequest) again to the base station, and described link establishment request message again comprises each carrier frequency disturbed condition of each time slot of mobile phone side;
(6) the base station link establishment request message again of receiving mobile phone discharges as yet if the base station is the resource of handset allocation, enters step (7), otherwise returns step (3);
(7) the optimum carrier frequency of sub-distribution carrier frequency is selected to remove in the base station from former distribution time slot, and structure link assignment message is filled into time slot and the carrier frequency that finds in the message body, sends to mobile phone, returns step (4) then.
The method of setup requests in above-mentioned a kind of PHS network, described step (1) is specially, mobile phone is under holding state, carrier search is carried out in timing or not timing, obtain the RSSI value under each carrier frequency of 4 time slots, get the minimum value of all carrier frequency,, determine the disturbed condition of each time slot according to the carrier frequency judgement threshold value of regulation among the 23rd page of the RCR STD-28 (V4.0).
The method of setup requests in above-mentioned a kind of PHS network, described step (2) is specially following steps:
A, mobile phone make a call;
B, handset configuration request for building link message are filled into the corresponding time slot position of Octet5 in the described request for building link message (byte 5) with the time slot interference information slip, send request for building link message to the base station.
The method of setup requests in above-mentioned a kind of PHS network, described step (5) is specially, the handset configuration link establishment is request message again, and the time slot interference information slip is filled into the described link establishment corresponding time slot position of Octet5 in the request message again, sends link establishment request message again to the base station.
The method of setup requests in above-mentioned a kind of PHS network, described step (3) is specially following steps:
(A) the request for building link message of mobile phone is received in the base station;
(B) from the Octet5 (byte 5) of message, extract mobile phone side time slot interference situation, obtain the time slot option table according to level of interference;
(C) according to the time interval resource table of the sequential query inside of base station from excellent to bad in the time slot option table, if find idle time slot, jump to step D, otherwise jump to step F;
(D) carrier frequency resource of described idle time slot is according to the availability sequence arrangement, and the sequential search available carrier frequencies if find, jumps to step e; If can not find an available carrier frequencies, and all time slots all search and finish, and jump to step F, if also have time slot not search as yet, jump to step C;
(E) structure link assignment message is filled into time slot and the carrier frequency that finds in the message body, sends to mobile phone;
(F) structure refusal link assignment message, Reason For Denial is no available time slot;
(G) structure refusal link assignment message, Reason For Denial is no available carrier frequencies.
From above process as can be seen, compared with prior art, the present invention has used that the free word among the Link channelestablishment request and Link channel establishment rerequest message realizes that mobile phone initiatively reports the time slot situation in the agreement, incidence is asked in foundation again thereby the optimum that improves base station assigns time slot and resource reduces cellular link, all is very helpful for improving base station performance and network performance.
Description of drawings
Figure 1 shows that the process of mobile phone and base station synchronization success.
Figure 2 shows that the unsuccessful process of mobile phone and base station synchronization.
Figure 3 shows that the aerial structure of time slot of PHS system.
Figure 4 shows that the carrier search process chart of mobile phone side of the present invention.
Figure 5 shows that the process chart of mobile phone of the present invention and base station calling link setup.
Figure 6 shows that base station side of the present invention works the link setup process process chart when exhaling.
Embodiment
The present invention will be described below in conjunction with accompanying drawing.
In the RCR STD-28 agreement, mobile phone mails to the request for building link message of base station and link establishment request message again, the Option (optional byte) of Octet5 (byte 5) generally is obsolete, therefore, the carrier frequency disturbed condition of 4 time slots when mobile phone can utilize 8 idle bit of Octet5 (byte 5) to report mobile phone to initiate request, like this base station when distributing time slot with reference to the situation of mobile phone side and the situation of base station side itself, distribute one for mobile phone, to disturb minimum time slot, so just can significantly reduce link establishment and ask incidence again.It also is same processing that link establishment is asked again.
Therefore, the present invention proposes a kind of mobile phone and initiatively reports the method for the CF signal situation of each time slot to reduce link establishment request incidence again.
The mobile phone side is divided into the carrier search process under the holding state during concrete enforcement, as shown in Figure 6; The mobile phone side works the link setup process when exhaling, as shown in Figure 7; Base station side works the link setup process when exhaling, as shown in Figure 8.
Mobile phone is under holding state, regularly and generally adopt interrupt mode to carry out carrier search, obtain the RSSI value under each carrier frequency of 4 time slots, get the minimum value of all carrier frequency, carrier frequency judgement threshold value according to regulation among the 23rd page of the RCR STD-28 (V4.0): Level1=26dbuv, Level2=44dbuv determines the disturbed condition of each time slot, and is as shown in table 1;
Table 1 carrier frequency level of interference
| The minimum value interval | Grade (value) |
| Be equal to or less than 26dbuv | Disturb low (01) |
| Between 26dbuv and the 44dbuv | Disturb moderate (10) |
| More than or equal to 44dbuv | Serious interference (11) |
The carrier search flow process of mobile phone side is supposed L1=26dbuv as shown in Figure 6, and L2=44dbuv regularly triggers by interrupt mode:
1, down trigger is closed and is interrupted;
2, begin to search for the RSSI value of the carrier frequency correspondence of removing 3 outer time slots of control time slot, if there is the record of this carrier frequency in the database, then upgrade, otherwise insert;
3, fetch data respectively and remove outer 3 time slots of control time slot in the storehouse and store the minimum value R of carrier frequency RSSI value
i, subscript i is a timeslot number, value is 1,2,3,4;
If 4 according to table 1 judgement R
iSpan, obtain level of interference, upgrade the time slot interference information slip, wherein control time slot and fill 00;
5, deposit time carrier frequency of search;
6, open interruption.
Mobile phone according to each time slot carrier frequency level of interference, is filled in the Linkchannel establishment request message body in the corresponding bit of the Octet5 position when initiating request for building link or link establishment and ask, and is as shown in table 2;
Table 2
| Time slot 4 | Time slot 3 | Time slot 2 | Time slot 1 | ||||
| ?Bit8 | ?Bit7 | ?Bit6 | ?Bit5 | ?Bit4 | ?Bit3 | ?Bit1 | ?Bit1 |
The value that two bit values of each time slot see Table behind 1 middle grade promptly is respectively 00,01,10,11.
The link setup process when exhaling is worked in mobile phone and base station, mobile phone effluent journey, as shown in Figure 7:
1, mobile phone makes a call, and closes to interrupt;
2 if dialing of caller off-hook or the called beep-page message of receiving are constructed Link channel establishmentrequest message, and the time slot interference information slip is filled into the corresponding time slot position of the Octet5 shown in the table 2, send a request message to the base station; If synchronization failure, handset configuration Link channel establishment rerequest message similarly, is filled into the corresponding time slot position of the Octet5 shown in the table 2 with the time slot interference information slip, sends request message again to the base station.
Following steps are carried out in the request for building link of receiving mobile phone or again behind the request message in the base station:
1, carries out behind the source codec according to the mobile phone side time slot option table that from Link channel establishment request message, obtains;
2, the base station again in conjunction with the time interval resource status list of inside of base station, is selected the idle time slot of an optimum according to mobile phone side time slot option table, and selects an optimum carrier frequency in this time slot;
3, the base station is filled into time slot and carrier frequency in the Link channel assignment message, sends this message to mobile phone.
Base station side Link channel establishment request Message Processing flow process:
1, the Link channel establishment request message of mobile phone is received in the base station;
2, from the Octet5 of message, extract mobile phone side time slot interference situation, obtain the time slot option table according to level of interference;
3, according to the time interval resource table of the sequential query inside of base station from excellent to bad in the time slot option table, if find idle time slot, jump to step 4, otherwise jump to step 6;
4, because the carrier frequency resource of this time slot according to the availability sequence arrangement, so sequential search available carrier frequencies if find, jumps to step 5; If can not find an available carrier frequencies, and all time slots all search and finish, and jump to step, if also have time slot not search as yet, jump to step 3;
5, structure Link channel assignment message is filled into time slot and the carrier frequency that finds in the message body, sends to mobile phone.
6, structure link assignment refuse information (Link channel assignment reject), Reason For Denial is no available time slot.
7, structure link assignment refuse information (Link channel assignment reject), Reason For Denial is no available carrier frequencies.
Base station side Link channel establishment rerequest Message Processing flow process:
1, the Link channel establishment rerequest message of mobile phone is received in the base station;
If 2 resources of being distributed for the Link channel establishment request message of this mobile phone do not discharge as yet, jump to step 3, otherwise jump to step 4;
3, select to remove the optimum carrier frequency of sub-distribution carrier frequency from former distribution time slot, structure Link channel assignment message is filled into time slot and the carrier frequency that finds in the message body, sends to mobile phone;
4, the handling process according to Link channel establishment request message is that mobile phone carries out resource allocation.
Claims (5)
1, the method for setup requests in a kind of PHS network is characterized in that, said method comprising the steps of:
(1) mobile phone is under holding state, and each carrier frequency of each time slot of adversary's pusher side is searched for, and obtains each carrier frequency disturbed condition;
(2) mobile phone is in caller off-hook dialing or called when receiving beep-page message, and described mobile phone sends request for building link message to the base station, and described request for building link message comprises each carrier frequency disturbed condition of each time slot of mobile phone side.
(3) base station is according to each carrier frequency disturbed condition of each time slot of mobile phone side, and the time slot and the carrier frequency situation of base station itself, determine the optimum carrier frequency of an idle time slot, and send link assignment message to mobile phone, described link assignment message comprises the optimum carrier frequency of above-mentioned idle time slot;
(4) mobile phone and base station synchronization success, step finishes; Synchronization failure then continues following steps;
(5) mobile phone sends link establishment request message again to the base station, and described link establishment request message again comprises each carrier frequency disturbed condition of each time slot of mobile phone side;
(6) the base station link establishment request message again of receiving mobile phone, if being the resource of handset allocation, the base station do not discharge as yet, the optimum carrier frequency of sub-distribution carrier frequency is selected to remove in the base station from former distribution time slot, structure link assignment message, the time slot and the carrier frequency that find are filled in the message body, send to mobile phone, return step (4) then; The link establishment that mobile phone is received in the base station is request message again, discharges if the base station is the resource of handset allocation, returns step (3).
3, the method for setup requests in a kind of PHS network as claimed in claim 1, it is characterized in that, described step (1) is specially, mobile phone is under holding state, carrier search is carried out in timing or not timing, obtain the RSSI value under each carrier frequency of 4 time slots, the minimum value of getting all carrier frequency is determined the disturbed condition of each time slot.
4, the method for setup requests in a kind of PHS network as claimed in claim 1, it is characterized in that: described step (2) is specially following steps:
A, mobile phone make a call;
B, handset configuration request for building link message are filled into the corresponding time slot position of Octet5 in the described request for building link message (byte 5) with the time slot interference information slip, send request for building link message to the base station.
5, the method for setup requests in a kind of PHS network as claimed in claim 2, it is characterized in that: described step (5) is specially, the handset configuration link establishment is request message again, the time slot interference information slip is filled into the described link establishment corresponding time slot position of Octet5 (byte 5) in the request message again, sends link establishment request message again to the base station.
6, the method for setup requests in a kind of PHS network as claimed in claim 2, it is characterized in that: described step (3) is specially following steps:
(A) the request for building link message of mobile phone is received in the base station;
(B) from the Octet5 (byte 5) of message, extract mobile phone side time slot interference situation, obtain the time slot option table according to level of interference;
(C) according to the time interval resource table of the sequential query inside of base station from excellent to bad in the time slot option table, if find idle time slot, jump to step D, otherwise jump to step F;
(D) carrier frequency resource of described idle time slot is according to the availability sequence arrangement, and the sequential search available carrier frequencies if find, jumps to step e; If can not find an available carrier frequencies, and all time slots all search and finish, and jump to step F, if also have time slot not search as yet, jump to step C;
(E) structure link assignment message is filled into time slot and the carrier frequency that finds in the message body, sends to mobile phone;
(F) structure refusal link assignment message, Reason For Denial is no available time slot;
(G) structure refusal link assignment message, Reason For Denial is no available carrier frequencies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100663289A CN101047954A (en) | 2006-03-28 | 2006-03-28 | Method for call setting request in PHS network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100663289A CN101047954A (en) | 2006-03-28 | 2006-03-28 | Method for call setting request in PHS network |
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| CN101047954A true CN101047954A (en) | 2007-10-03 |
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| CNA2006100663289A Pending CN101047954A (en) | 2006-03-28 | 2006-03-28 | Method for call setting request in PHS network |
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| WO2012062070A1 (en) * | 2010-11-09 | 2012-05-18 | 中兴通讯股份有限公司 | Method, system and server for feeding back state of receiving end |
| US9420438B2 (en) | 2010-11-09 | 2016-08-16 | Zte Corporation | Method, system and server for feeding back state of receiving end |
| US8725145B2 (en) | 2011-01-25 | 2014-05-13 | Qualcomm Incorporated | Mobile device requests of non-communication time periods to a wireless communication network |
| WO2012171395A1 (en) * | 2011-06-17 | 2012-12-20 | 电信科学技术研究院 | Method, system, and device for allotting and determining pdcch |
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