CN101431775A - Transmitting/receiving method and apparatus for carrier frequency switch assisting information - Google Patents
Transmitting/receiving method and apparatus for carrier frequency switch assisting information Download PDFInfo
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- CN101431775A CN101431775A CNA2007101242991A CN200710124299A CN101431775A CN 101431775 A CN101431775 A CN 101431775A CN A2007101242991 A CNA2007101242991 A CN A2007101242991A CN 200710124299 A CN200710124299 A CN 200710124299A CN 101431775 A CN101431775 A CN 101431775A
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- carrier frequency
- message
- load information
- beacon message
- portable terminal
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000007704 transition Effects 0.000 claims description 45
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000013507 mapping Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 abstract description 3
- 230000035939 shock Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 240000005373 Panax quinquefolius Species 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
Abstract
The invention belongs to the technical field of wireless communication, and discloses a method for receiving and sending assistant carrier frequency switching information. The method comprises: sending beaconing information carried with load information or delay information to a mobile terminal; and receiving the beaconing information by the mobile terminal, and selecting carrier frequency to switch after analyzing and calculating. A device for the method comprises a base station and the mobile terminal, wherein the base station comprises a generating module and a sending module; and the mobile terminal comprises a receiving module, a reading module, a lookup module and a calculating module. By adopting the method and device, load shock for the base station selected by the large amount of the mobile terminals to a same target carrier frequency or a network moment can be reduced.
Description
Technical field
The invention belongs to the wireless communication technique field, particularly a kind of receiving/transmission method of carrier frequency switch assisting information and device.
Background technology
Wireless telecommunication system just is being applied as different users widely various wireless communication services is being provided, and comprises voice, data etc.In order to support higher message transmission rate and better to support multimedia service, require the bigger bandwidth of wireless telecommunication system support, a plurality of reference bandwidths are united binding use, thereby bigger bandwidth service is provided.In the multi-carrier EV-DO technology, with the bandwidth binding of a plurality of 1.25MHz, maximum can be supported the carrier wave of 15 1.25MHz, thereby bigger peak rate is provided, and this pattern generally is called multi-carrier mode (multi-carrier).Such as can under a sector, providing a plurality of carrier waves to serve.Certainly, cover for better frequency is provided, cellular wireless access system can also carry out frequency planning, can be formulated for adjacent sector different carrier frequency this moment, carry out frequency reuse planning, at this moment the covering that can provide this moment is appreciated that also that becoming is a kind of multi-carrier mode.
In Ultra-Mobile Broadband (UMB) standard, can support multi-carrier mode.(MobileStation MS) can switch on a plurality of carrier waves according to signal strength signal intensity between the different carrier waves and load allocating portable terminal flexibly.But for the lower terminal of some cost, may have only a radio frequency reception channel, so constantly at each, mobile terminal MS can only be monitored a signal on the carrier frequency, if mobile terminal MS wants to switch to other carrier frequency, mobile terminal MS must switch the radio-frequency channel to other carrier frequency frequency points corresponding, carry out signal measurement then, this moment, mobile terminal MS just can not continue to receive the data that send on the original service carrier frequency, may cause transfer of data to interrupt, also, cause handover delay to increase because will switch the radio-frequency channel.
Document: C.P0084-006-0-v1.6-ConnectionControlPlane_V﹠amp; V_Clean in order to solve the problems of the technologies described above, increases a beacon signal in UMB.The effect of this signal is exactly a signal strength signal intensity of measuring other carrier frequency for mobile terminal MS fast, switches.But in beacon signal, only carry base station (Base Station, BS) wish the purpose carrier frequency that mobile terminal MS switches, if so some moment, a large amount of portable terminals move to cell edge, and find that also beacon signal is enough good, a large amount of mobile terminal MS decisions are initiated to switch, but owing to have only 1 purpose carrier frequency, so these mobile terminal MSs all will switch to the purpose carrier frequency, on the purpose carrier frequency, find range (ranging) or oppositely access operation, thereby the reverse access signal or the range channel of purpose carrier frequency caused very big moment load impact.Like this, no matter be the mobile terminal MS of serving down for former carrier frequency, still switch the mobile terminal MS of coming, all can cause access or ranging time delay to increase.
Summary of the invention
The embodiment of the invention provides a kind of receiving/transmission method and device of carrier frequency switch assisting information especially in order to solve deficiency of the prior art.
The method of the embodiment of the invention comprises:
A kind of method that sends carrier frequency switch assisting information sends beacon message to portable terminal, and described beacon message carries transition probability or deferred message, and described load information or deferred message are used to assist a ruler in governing a country portable terminal and carry out the carrier frequency switching.
A kind of method that receives carrier frequency switch assisting information, portable terminal receives beacon message, and described beacon message carries transition probability or deferred message, and described load information or deferred message are used to assist a ruler in governing a country portable terminal and carry out the carrier frequency switching.
The base station of the embodiment of the invention comprises:
Generation module: be used to generate beacon message, described beacon message carries the load information or the deferred message of carrier frequency, or further carries transition probability corresponding with described load information or the length of delay corresponding with described deferred message;
Sending module: be used for sending described beacon message to portable terminal.
The portable terminal of the embodiment of the invention comprises:
Receiver module: be used to receive beacon message, described beacon message carries the load information or the deferred message of carrier frequency, or further carries transition probability corresponding with described load information or the length of delay corresponding with described deferred message;
Read module: be used to read load information or the deferred message that beacon message carries, or read transition probability or the length of delay that further carries in the described beacon message;
Search module: be used for searching the transition probability corresponding with load information from mapping table, or the length of delay corresponding with deferred message;
Computing module: between 0～1, generate a numeral and transition probability at random and compare selection and whether carry out carrier frequency and switch, or select to carry out carrier frequency according to length of delay and switch.
At the optimization of beacon message, adopt the method and the device of the embodiment of the invention, can reduce a large amount of portable terminals and choose same target carrier frequency or network moment load impact the base station.
Description of drawings
Fig. 1 is the base station schematic diagram of the embodiment of the invention;
Fig. 2 is the method step flow chart of the embodiment of the invention 1;
Fig. 3 is the flow chart of steps of the inventive method;
Fig. 4 is the base station apparatus of the embodiment of the invention and the schematic diagram of mobile terminal apparatus.
Embodiment
In order to solve deficiency of the prior art, the embodiment of the invention provides a kind of receiving/transmission method of carrier frequency switch assisting information especially, is described in detail below by concrete execution mode.
Embodiment 1
With reference to Fig. 1, Fig. 2, in the Ultra-Mobile Broadband UMB system based on multi-carrier mode, be divided into 3 sectors under the base station, each sector is used different carrier frequency f1/f2/f3 respectively.A portable terminal is in 1 (101) lining, sector, and 1 (101) moves to sector 2 (102) from the sector, and portable terminal need switch to the carrier frequency under the sector 2 (102).May further comprise the steps:
Step 11, the base station preestablishes the transition probability that increases in the beacon message, and the beacon message that generates corresponding beacon message and will carry transition probability in the scope that covers carries out periodicity transmission;
Step 12, portable terminal receives the beacon message that each carrier frequency sends in the sector 2 (102), and measures the intensity of the beacon message of each carrier frequency transmission, and the beacon message that carrier frequency f1 sends in the sector 2 that finally the selective reception signal is stronger;
Step 13, portable terminal read the transition probability that carries in the beacon message that carrier frequency f1 sends in the sector 2;
Load information that beacon message carries and corresponding transition probability can as shown in table 1ly carry out value to be set, but is not limited thereto.
Table 1
| Load information | Transition probability |
| 0 | 1/4 |
| 1 | 1/2 |
| 2 | 3/4 |
| 3 | 1 |
Step 14, portable terminal generate a number at random between 0～1, as 0.9, random number and the transition probability that reads are compared, if the number of Sheng Chenging is greater than described transition probability at random, then portable terminal switches to the carrier frequency f1 of sector 2 (102).Otherwise portable terminal continues the beacon message of other carrier frequency transmissions of scanning or waits for that next continues to monitor the beacon message that same carrier frequency sends constantly.
Present embodiment carries out the carrier frequency switching at single mobile terminal and has proposed an embodiment, especially for the lower terminal of some cost, guaranteed under the situation of having only a radio frequency reception channel, can guarantee that still portable terminal is continuing to carry out the carrier frequency switching under the data conditions that sends on the original service of the reception carrier frequency, the transfer of data of having avoided causing is interrupted.
Embodiment 2
With reference to Fig. 1, Fig. 3, in the Ultra-Mobile Broadband UMB system based on multi-carrier mode, if the portable terminal of two different priorities is in 1 (101) lining, sector simultaneously, and all 1 (101) move to sector 2 (102) from the sector, two portable terminals all need to switch to the carrier frequency under the sector 2 (102), may further comprise the steps:
Step 21, the base station preestablishes the transition probability that increases in the beacon message, and considers user's priority, the user of different priorities, the transition probability difference of setting; And the base station will carry the beacon message of setting transition probability and carry out periodicity transmission in the scope that covers;
Step 22, two portable terminals receive the beacon message that each carrier frequency sends in the sector 2, and measure the intensity of the beacon message of each carrier frequency transmission, and the beacon message that carrier frequency f1 sends in the sector 2 that finally the selective reception signal is stronger;
The information of carrying in the beacon message that step 23, two portable terminals send carrier frequency f1 in the sector 2 simultaneously reads;
For the high priority portable terminal, load information and corresponding with it transition probability can as shown in table 2ly carry out value to be set, but is not limited thereto.
Table 2
| Load information | Transition probability |
| 0 | 1/16 |
| 1 | 1/8 |
| 2 | 1/4 |
| 3 | 1/2 |
For the low priority portable terminal, load information and corresponding with it transition probability can as shown in table 3ly carry out value to be set, but is not limited thereto.
Table 3
| Load information | Transition probability |
| 0 | 1/4 |
| 1 | 1/2 |
| 2 | 3/4 |
| 3 | 1 |
Step 24, for example same load is set at 1 o'clock, and the transition probability that the high priority portable terminal reads is 1/8, and the transition probability that the low priority portable terminal reads is 1/2.
Step 25, for example the numeral 0.5 that all generates at random of high priority portable terminal and low priority portable terminal compares with transition probability respectively, and then the high priority portable terminal can preferentially switch.
Present embodiment is by being provided with the different priorities of different mobile terminal, and then different transition probabilities is set according to different priority, guaranteed can be orderly when a plurality of portable terminals switch to same purpose carrier frequency simultaneously switching, avoid the reverse access signal or the range channel of purpose carrier frequency are caused very big moment load impact, reduced the generation of network congestion.
Embodiment 3
With reference to Fig. 1, Fig. 3, in the Ultra-Mobile Broadband UMB system based on multi-carrier mode,
Step 31, base station are set the deferred message carry a 2bits in advance in beacon message, unit is a frame, and will carry the beacon message of setting deferred message carry out periodicity transmission in the scope that covers;
Step 32, portable terminal receives the beacon message of purpose carrier frequency, and reads the deferred message in the beacon message;
Length of delay preestablishes the mapping table value according to system, and mapping table can as shown in table 4ly be set, but is not limited thereto:
Table 4
| Postpone index | Length of delay (unit: frame) |
| 0 | 1 |
| 1 | 3 |
| 2 | 5 |
| 3 | 10 |
Step 33 at same all portable terminals of being ready at all times to switch to target carrier frequency, selects value as own time of delay at random, and what select as portable terminal A is 5, and portable terminal B selection is 3, and then portable terminal B switches to target carrier frequency behind 3 frames; Portable terminal A need just can switch to target carrier frequency behind 5 frames, portable terminal B switches to target carrier frequency earlier than portable terminal A.
Present embodiment is by being provided with the different priorities of different mobile terminal, and then different delay values is set, guaranteed can be orderly when a plurality of portable terminals switch to same purpose carrier frequency simultaneously switching, avoid the reverse access signal or the range channel of purpose carrier frequency are caused very big moment load impact, reduced the generation of network congestion.
The embodiment of the invention also provides a kind of method of the present invention related device, comprises a kind of base station 301 and a kind of portable terminal 302, with reference to Fig. 4:
Described base station comprises:
Generation module 3011: be used to generate beacon message, described beacon message carries the load information or the deferred message of carrier frequency, or further carries transition probability corresponding with described load information or the length of delay corresponding with described deferred message;
Sending module 3012: be used for sending described beacon message to portable terminal.
Described portable terminal comprises:
Receiver module 3021: be used to receive beacon message, described beacon message carries the load information or the deferred message of carrier frequency, or further carries transition probability corresponding with described load information or the length of delay corresponding with described deferred message;
Read module 3022: be used to read load information or the deferred message that beacon message carries, or read transition probability or the length of delay that further carries in the described beacon message;
Search module 3023: be used for searching the transition probability corresponding with load information from mapping table, or the length of delay corresponding with deferred message;
Computing module 3024: between 0～1, generate a numeral and transition probability at random and compare selection and whether carry out carrier frequency and switch, or select to carry out carrier frequency according to length of delay and switch.
The present invention is not breaking away under its spirit and the substantive characteristics prerequisite, multiple embodiment can be arranged, be to be understood that the foregoing description is not limited to above-mentioned any details, and should in the defined spirit and scope of claims, be explained widely, therefore, all drop in the border of claim and the scope or with the variation of these borders and scope equivalence with revise and all attempt to be included in the accessory claim.
Claims (13)
1, a kind of method that sends carrier frequency switch assisting information is characterized in that, sends beacon message to portable terminal, and described beacon message carries load information or deferred message, and described load information or deferred message are used to assist a ruler in governing a country portable terminal and carry out the carrier frequency switching.
2, method according to claim 1 is characterized in that, described beacon message can further carry transition probability corresponding with described load information or the length of delay corresponding with described deferred message.
3, method according to claim 1 is characterized in that, the transmission of described beacon message can periodically send.
4, method according to claim 1 and 2 is characterized in that, described load information or transition probability or deferred message or length of delay all can preestablish it in the base station.
5, method according to claim 2 is characterized in that, described length of delay can be selected different pieces of information unit for use for it according to different system.
6, a kind of method that receives carrier frequency switch assisting information is characterized in that, portable terminal receives beacon message, and described beacon message carries the load information or the deferred message of carrier frequency, and described load information or deferred message are used to assist a ruler in governing a country portable terminal and carry out the carrier frequency switching.
7, method according to claim 6 is characterized in that, described beacon message can further carry transition probability corresponding with described load information or the length of delay corresponding with described deferred message.
8, method according to claim 6 is characterized in that, described method further comprises:
Described portable terminal reads the load information that carries in the beacon message or deferred message and searches corresponding transition probability or length of delay according to load information or deferred message, or directly reads transition probability or the length of delay that carries in the beacon message.
9, method according to claim 8 is characterized in that, carry in the described beacon message be load information or transition probability the time, portable terminal generates a numeral at random between 0～1, compare with described transition probability:
A, generation numeral at random are greater than this transition probability, and portable terminal inserts this purpose carrier frequency;
B otherwise, portable terminal continues the beacon message that other carrier frequency of scanning send or waits for that next continues to monitor the beacon message that same carrier frequency sends constantly.
10, method according to claim 8 is characterized in that, carry in the described beacon message be deferred message or length of delay the time, portable terminal carries out carrier frequency according to described length of delay and switches.
11, method according to claim 8 is characterized in that, described method further comprises:
When described beacon message carries the load information of carrier frequency or transition probability, portable terminal obtains self service quality priority information, and described portable terminal switches in conjunction with described portable terminal self service quality priority Information Selection target carrier frequency according to the load information or the transition probability of described carrier frequency.
12, a kind of base station is characterized in that, comprising:
Generation module (3011): be used to generate beacon message, described beacon message carries the load information or the deferred message of carrier frequency, or further carries transition probability corresponding with described load information or the length of delay corresponding with described deferred message;
Sending module (3012): be used for sending described beacon message to portable terminal.
13, a kind of portable terminal is characterized in that, comprising:
Receiver module (3021): be used to receive beacon message, described beacon message carries the load information or the deferred message of carrier frequency, or further carries transition probability corresponding with described load information or the length of delay corresponding with described deferred message;
Read module (3022): be used to read load information or the deferred message that beacon message carries, or read transition probability or the length of delay that further carries in the described beacon message;
Search module (3023): be used for searching the transition probability corresponding with load information from mapping table, or the length of delay corresponding with deferred message;
Computing module (3024): between 0～1, generate a numeral and transition probability at random and compare selection and whether carry out carrier frequency and switch, or select to carry out carrier frequency according to length of delay and switch.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101242991A CN101431775A (en) | 2007-11-06 | 2007-11-06 | Transmitting/receiving method and apparatus for carrier frequency switch assisting information |
| PCT/CN2008/072410 WO2009059514A1 (en) | 2007-11-06 | 2008-09-18 | A method and device for sending and receiving assisting information for switching carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101242991A CN101431775A (en) | 2007-11-06 | 2007-11-06 | Transmitting/receiving method and apparatus for carrier frequency switch assisting information |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101431775A true CN101431775A (en) | 2009-05-13 |
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ID=40625379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101242991A Pending CN101431775A (en) | 2007-11-06 | 2007-11-06 | Transmitting/receiving method and apparatus for carrier frequency switch assisting information |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101431775A (en) |
| WO (1) | WO2009059514A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106304207A (en) * | 2015-05-15 | 2017-01-04 | 北京三星通信技术研究有限公司 | Residence reselecting under multicarrier scene, reduction community access the method and apparatus of load |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6078571A (en) * | 1997-09-19 | 2000-06-20 | Motorola, Inc. | Apparatus and method for transmitting beacon signals in a communication system |
| CN1205834C (en) * | 2000-03-23 | 2005-06-08 | 西门子移动通讯公司 | Access channel scheduling in a radio communication system |
| US7352728B2 (en) * | 2002-03-07 | 2008-04-01 | Koninklijke Philips Electronics N.V. | Fast channel switching scheme for IEEE 802.11 WLANs |
| EP1574097A1 (en) * | 2002-12-19 | 2005-09-14 | Nokia Corporation | System and handover mechanism in frequency multiple band environment and equipment therefor |
-
2007
- 2007-11-06 CN CNA2007101242991A patent/CN101431775A/en active Pending
-
2008
- 2008-09-18 WO PCT/CN2008/072410 patent/WO2009059514A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106304207A (en) * | 2015-05-15 | 2017-01-04 | 北京三星通信技术研究有限公司 | Residence reselecting under multicarrier scene, reduction community access the method and apparatus of load |
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| Publication number | Publication date |
|---|---|
| WO2009059514A1 (en) | 2009-05-14 |
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Open date: 20090513 |