CN103428708B - Radio switch-in method in a kind of cognition wireless network and system - Google Patents
Radio switch-in method in a kind of cognition wireless network and system Download PDFInfo
- Publication number
- CN103428708B CN103428708B CN201310344221.6A CN201310344221A CN103428708B CN 103428708 B CN103428708 B CN 103428708B CN 201310344221 A CN201310344221 A CN 201310344221A CN 103428708 B CN103428708 B CN 103428708B
- Authority
- CN
- China
- Prior art keywords
- cognitive
- user
- frequency
- terminal
- base station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention relates to the radio switch-in method in a kind of cognition wireless network and system, it is in cognition wireless network, cognitive pilot channel is utilized to carry out the wireless access of auxiliary cognitive user terminal, described method comprises: cut-in method, is the method for the idle frequency of cognitive user terminal insertion authority system; Frequency spectrum switching method is the frequency spectrum switching method triggered when primary user occurs or the service quality of cognitive user drops to certain threshold value.The present invention mainly considers the communication process of cognitive user, comprise the initial access process after cognitive terminal start, yielding when occurring of network environment information obtain manner, primary user and switching and communication quality decline the frequency spectrum switching etc. caused, in communication process, utilize cognitive pilot channel to obtain the spectrum information of environment, accessory terminal finds network fast and frequency spectrum access, avoid cognitive terminal to the scanning of frequency spectrum on a large scale and the operation of perception, thus realize the process of cognitive terminal fast access into network.
Description
Technical field
The present invention relates to wireless network, the radio switch-in method particularly in a kind of cognition wireless network and system, particularly relate in a kind of cognition wireless network the method and system utilizing cognitive pilot channel and cognitive pilot channel to assist wireless access.
Background technology
In recent years, cognition wireless network obtains the concern of all circles.Cognition wireless network is made up of authoring system and unauthorized system, wherein, authoring system refers to the communication system being licensed certain section of frequency spectrum by spectrum regulatory body, and the communication of authoring system is not by the interference of other system, under normal conditions, the utilance of frequency range shared by authoring system is not very high, often there is idle frequency range; Unauthorized system refers to the communication system operated in unlicensed spectrum or on the cognitive frequency spectrum obtained, and in cognitive radio system, cognitive system is intended to the frequency range of the free time again utilized in authoring system.The user of authoring system is called primary user (primaryuser, PU), and aim belongs to authoring system and operates in the user that it authorizes frequency range; Be called cognitive user or secondary user (secondaryuser/cognitiveuser, SU/CRU) the user of unauthorized system, refer to by obtaining idle frequency spectrum in unauthorized frequency range and carrying out to these idle frequency spectrums the user that frequency spectrum uses.So-called idle frequency spectrum, refers to that certain frequency band is assigned to primary user, but in some time domain, frequency domain or spatial domain not by frequency spectrum that main family utilizes.So-called frequency spectrum is used, refer to the acquisition of information of cognitive user by frequency spectrum perception and surrounding environment, find the idle frequency spectrum in authoring system, under prerequisite authorized user communication not being caused to interference, the use of formula of idle frequency spectrum being seized every opportunity in the mode of using, when primary user occurs, cognitive user exits frequency spectrum in time, thus improves the availability of frequency spectrum.In the process of access frequency spectrum, the priority that primary user accesses the priority ratio time user of frequency spectrum is high, need to cause interference to primary user by the communication of various technique guarantee time user, as carried out power control to secondary user, the modulation system changing time user, secondary user carry out frequency spectrum and make a concession and switch.In cognition wireless network, CRU uses the available free frequency spectrum in authoring system frequency range, and prerequisite ensures not cause interference to the communication of primary user.And the primary user in authoring system communicated according to former mode, suppose it and do not know to have the existence of cognitive user, needing just according to existing protocol regulation access network as long as have.
Because the service condition of authorized user to frequency spectrum is uncertain, moment change, thus cause available free frequency spectrum set in system also in continuous change.Cognitive user is when initial access network, very strange to network environment, and the frequency point information that the last time of tag memory storage uses probably is in busy condition, select to have little significance in the community therefore based on the information of storage, very large probability needs to carry out initial cell selection.In this case, just need the service condition of terminal to the mandate frequency range in each authoring system to carry out perception, by the assessment to each available free frequency spectrum, could determine how to select its frequency spectrums of operation.But the process need of this frequency spectrum perception and data fusion for a long time and also power consumption large, portable terminal device service time can be reduced, reduce the satisfaction that user uses.
So this patent proposes to utilize cognitive pilot channel (CognitivePilotChannel, CPC) to carry out the initial wireless access of accessory terminal.Cognitive user is by the acquisition to cognitive pilot channel message, obtain the various necessary informations (as: business information that access network information, usable spectrum information, network can provide, network load condition information, network policy information etc.) of cognition wireless network, thus realize receiving the operations such as selection to the initial perception of network environment, Network finding and autonomous network, avoid terminal directly to carry out frequency spectrum perception and data fusion, reduce complexity and the terminal power consumption of access.
About the method and system utilizing cognitive pilot channel and cognitive pilot channel to assist wireless access in this cognition wireless network, there is following technology:
Patent documentation 1(patent No. CN201010150099.5): cognitive system initial method, device and system that perception pilot frequency channel is supported, this patent provides a kind of method that in cognitive system of cognitive pilot tone support, terminal and working frequency points establish the link.Send frequency initialization request (i.e. initial access network) by terminal to cognitive pilot tone AP, cognitive pilot tone AP sends frequency initialization response message and comprises cognitive pilot tone private resource descriptor.According to the multi-upstream access channel of cognitive pilot tone private resource instruction, the perception information of terminal transmitting terminal on this multi-upstream access channel, base station sends perception information by broadcast to terminal.Carried out the working frequency points of decision-making terminal by the common factor non-NULL of the perception information of terminal and the perception information of base station, and establish the link in the working frequency points of decision-making.When multiple user carries out initialization request, distribute different cognitive pilot tone private resources and different multi-upstream access channels to each user.
The patent documentation 2(patent No. is CN201110075531.3): cognitive pilot frequency transmission method and based on the radio switch-in method of cognitive pilot tone and system, this patent provides a kind of transmission method of cognitive pilot tone and gives the mode that a kind of cognitive pilot aided terminal carries out wireless access.By cognitive pilot tone being divided into the cognitive pilot tone of main and secondary cognitive pilot tone, that considers the cognitive pilot tone of main and secondary cognitive pilot tone according to the coverage condition of wireless access type is carried in the fixed physical resource of wireless access type and the mode of variable physical resource, cognitive pilot frequency information is sent to terminal, to realize the optimization of user network and Radio Resource.First need the loading position being determined the cognitive pilot tone of main by scanning, decide how to load cognitive pilot frequency information according to the coverage condition of wireless access type.By the initial access of the cognitive pilot aided terminal of main, by the continuation communication of secondary cognitive pilot aided terminal.
The patent documentation 3(patent No. is CN201110405827.7): the frequency spectrum switching method in a kind of cognitive radio system and equipment, a kind of method that this patent provides cognitive system frequency spectrum to switch.The cognitive radio ad Hoc wireless network device identification of user's transmission spectrum switching command is arranged by base station and user, when the working frequency points of active user finds authorized user, generate frequency spectrum switching command, trigger the operating process that a series of frequency spectrum switches and frequency spectrum is made a concession.
The patent documentation 4(patent No. is CN201210069827.9): the frequency spectrum switching method in a kind of cognitive radio system and equipment, this patent considers the dedicated random access resource of the target frequency that base station is switched at frequency spectrum by frequency spectrum switching command command terminal, thus realize the Stochastic accessing of terminal on target frequency, reduce handover failure rate.
But, in the above prior art, there is following technological deficiency:
1, cognitive user and cognitive net in the communication of idle frequency of authoring system, the network initial access process as started should be comprised, network environment information obtain manner, the communication process that the frequency switching that yielding when primary user occurs and communication quality decline etc. are complete, in patent documentation 1 and patent documentation 2, the initial access of terminal and network can only be considered, in patent documentation 3 and patent documentation 4, the frequency spectrum that only considered terminal and network switches, and is not described the communication process of complete cognitive user.
2, described in patent documentation 1, when multiple user carries out initialization request, distribute different cognitive pilot tone private resources and different multi-upstream access channels to each user, the method not easily ensures the smooth access network of cognitive user, easily occurs competition in access procedure.
3, described in patent documentation 3, " after described base station equipment finds that in current working frequency the user of authoring system occurs; generate frequency spectrum switching command " frequency spectrum that only considered when primary user occurs switches, also need when not considering that network service quality declines to carry out frequency spectrum switching, patent documentation 3 only relates to the method that frequency spectrum switches, and does not consider the network type switched.
4, described in patent documentation 4, " base station is by the dedicated random access resource on the target operation frequency of frequency spectrum switching command designated terminal required application in frequency spectrum handoff procedure ", avoid the access contention between terminal thus, but do not relate to complete frequency spectrum switching flow, the network type switched is not considered yet.
Summary of the invention
In order to solve the problem, the object of the invention is to the radio switch-in method in open a kind of cognition wireless network and system, in communication process, consider the complete communication process of cognitive user, comprise the initial access process after cognitive terminal start, network environment information obtain manner, yielding when primary user occurs and switching and communication quality decline the frequency spectrum handover decisions etc. caused, and utilize cognitive pilot channel to obtain the spectrum information of environment, accessory terminal finds the method for network and frequency spectrum access fast, thus avoid cognitive terminal to the scanning of frequency spectrum on a large scale and the operation of perception, accelerate the process of the fast access into network of cognitive terminal.
To achieve these goals, the present invention proposes the radio switch-in method in a kind of cognition wireless network, the idle frequency of cognitive pilot channel accessory terminal insertion authority system is utilized for the cognitive user in cognition wireless network, described wireless method also comprises: frequency spectrum switch step, occur for primary user or the service quality of cognitive user drops to certain threshold value time be switched to other idle frequencies from current frequency.
Radio switch-in method in cognition wireless network of the present invention, comprises following access step:
1, cognitive user is carried out synchronous with described cognitive pilot channel, and uses self-contained technology to position;
2, cognitive user is on the up channel of described cognitive pilot channel, sends cognitive pilot request message to cognitive base station, and carries oneself positional information and user identification code;
3, cognitive base stands on the down channel of described cognitive pilot channel, sends the cognitive pilot tone access assistance messages of corresponding mesh to terminal;
4, cognitive user is assessed the wireless access type preferred list that the available free frequency in described access assistance messages carries according to terminal, and completes public land mobile network selection, cell selection operation;
5, after cognitive user resides in certain community, hold period judges whether to carry out cell reselection operation, ensures to reside in the best community of service quality;
6, cognitive user is to cognitive base station initiating random access procedure on resident frequency, and cognitive base station sends accidental access response to cognitive user, thus cognitive user and cognitive base station are established the link;
7, cognitive base station is that cognitive user distributes ascending resource;
8, cognitive base station is cognitive user allocation of downlink resource.
Radio switch-in method in cognition wireless network of the present invention, also comprises following frequency spectrum switch step:
9, primary user's active situation and cognitive user communication quality are detected in cognitive base station, adjudicate and switch the need of frequency spectrum;
10, cognitive base station triggers frequency spectrum switches, and inform that cognitive user stops business, cognitive user waits for handover decisions;
11, the wireless access type select target of terminal that cognitive base station is carried according to cognitive user switches frequency;
12, the target of selection is switched frequency and informs terminal by cognitive base station, and terminal switches frequency point information according to target and re-establishes and the linking of base station.
13, cognitive base station is that cognitive user distributes ascending resource and downlink resource, the transformation task do not completed before having continued switching.
Radio switch-in method in cognition wireless network of the present invention, described terminal configuration has the list of wireless access type preference priority.
Radio switch-in method in cognition wireless network of the present invention, is divided into two special channels as cognitive pilot tone up channel and cognitive pilot tone down channel using described cognitive pilot channel.
Radio switch-in method in cognition wireless network of the present invention, cooperate to the frequency spectrum perception process of authoring system in wireless cognition net by cognitive user terminal and cognitive base station, determined the available free frequency of cognitive terminal by cognitive base station according to sensing results.
Radio switch-in method in cognition wireless network of the present invention, carries available free spectrum information in described cognitive pilot tone message, and cognitive pilot tone message is divided into cognitive pilot tone to access assistance messages and cognitive pilot tone switching assistance messages two kinds; Described cognitive pilot tone access assistance messages and described cognitive pilot tone switch assistance messages and synchronously upgrade, and these two set do not have clearly boundary, flexibility and changeability, but the set that described cognitive pilot tone switches assistance messages can not be empty.
Radio switch-in method in cognition wireless network of the present invention, in step 3, the form of spectrum information by cognitive pilot tone response message is organized by cognitive base station, the form of described cognitive pilot tone response message is different " mesh#ID:Operator#i, RAT#j, frequency#k ... " combination, its intermediate-frequeney point can be only enumerate available idle frequency, also can be the state that each frequency is used by primary user, other information on each frequency can also be comprised in described cognitive pilot tone response message, and described cognitive pilot tone response message constantly upgrades according to up-to-date frequency spectrum perception fusion results.
Radio switch-in method in cognition wireless network of the present invention, in step 4, if under this wireless access type, community is selected unsuccessful, then according to wireless access type priority list, select next wireless access type, attempt at the available free frequency of next wireless access type.
Radio switch-in method in cognition wireless network of the present invention, in step 4, if what select is not the wireless access type of limit priority, so will first reshuffle before carrying out Cell searching.On cognitive pilot channel, resource is reshuffled in application, downloads corresponding agreement and carries out terminal and reshuffle.
Radio switch-in method in cognition wireless network of the present invention, in the random access procedure of step 6, a Stochastic accessing check code is arranged to each cognitive user in cognitive base station, and all users are arranged to the content of identical accidental access response, only having is undertaken decoding by described Stochastic accessing check code obtains correct accidental access response, and user sets up just success with linking of base station.
Radio switch-in method in cognition wireless network of the present invention, in the random access procedure of step 6, multiple user is carried out simultaneously to the situation of Stochastic accessing, only have that cognitive user of asking the earliest to obtain successfully decoded, do not obtain other cognitive user then random access failure be correctly decoded.
Radio switch-in method in cognition wireless network of the present invention, in a step 11, if the available free frequency spectrum set under current wireless access style is empty, then according to present terminal business transport-type, select the available free frequency spectrum in other wireless access type.
Radio switch-in method in cognition wireless network of the present invention, in step 12, if cognitive user access or when to be switched to terminal on the different wireless access type of existing configuration, needs first to reshuffle terminal.
Technique effect of the present invention:
The present patent application can better merge with existing wireless access system, furtherly, the program is applied to existing wireless communications technology, the method of wireless access is assisted by cognitive pilot channel, by obtaining spectrum environment information to cognitive pilot channel message, avoid cognitive terminal directly to carry out frequency spectrum perception and data fusion, reduce complexity and the terminal power consumption of access.In addition, adopt cognitive terminal to reshuffle scheme, support multiple access technology, effectively utilize existing network facility, improve the availability of frequency spectrum.
Accompanying drawing explanation
Fig. 1 is the idle frequency access process figure in the authoring system of cognitive user of the present invention and cognition network.
Fig. 2 is the frequency spectrum switching flow of the idle frequency in the authoring system of cognitive user of the present invention and cognition network.
Embodiment
In the present invention, mainly the communication process of cognitive user is considered, comprise the initial access process after cognitive terminal start, network environment information obtain manner, primary user yielding when occurring and switching and the communication quality frequency spectrum caused that declines switches, the continuity of the secondary telex network of guarantee of trying one's best.
Below the radio switch-in method in the cognition wireless network that the present invention relates to is described in detail:
Suppose that cognitive user all can be reshuffled, and the frequency spectrum of this wireless access type system could be used after needing to reshuffle according to selected wireless access type.In addition, require the self-contained GPS of terminal, support cognitive pilot tone and cognitive pilot tone message can be understood.Each terminal can the list of self-contained wireless access type preference priority, and is configured according to the wireless access type of limit priority.
From the feature of perception time consumption and energy consumption, consider that frequency spectrum perception process is completed by cognitive terminal and cognitive base station collaboration, by cognitive base station, sensing results is merged, and organize merging the spectrum information obtained by the form of cognitive pilot tone message.The form of cognitive pilot tone response message is different { mesh#ID: operator operator#i, wireless access type RAT#j, frequency frequency#k ... combination, its intermediate-frequeney point can be only enumerate available idle frequency, also can be the state that each frequency is used by primary user, in addition, other information on each frequency in cognitive pilot tone response message, can also be comprised, as available bandwidth, loading condition, power water equality.Cognitive pilot tone message constantly upgrades according to up-to-date frequency spectrum perception fusion results.
Cognitive pilot channel is divided into up dedicated request channel and descending cognitive pilot tone message transport channels.Cognitive system coordinates a public frequency and specific bandwidth designs as cognitive pilot channel, divides two special channels as cognitive pilot tone up channel and cognitive pilot tone down channel.
Consider the available free frequency spectrum in cognitive pilot tone message to be divided into two parts, cognitive pilot tone access assistance messages, cognitive pilot tone switches assistance messages.(be equivalent in the set of available free frequency spectrum, reserved a part of usable spectrum is used as to switch.) cognitive pilot tone accesses assistance messages and cognitive pilot tone switching assistance messages synchronously upgrades, and these two set do not have clearly boundary, flexibility and changeability, but it can not be empty that cognitive pilot tone switches assistance messages set, in order to ensure that the cognitive user communicated has yielding frequency spectrum for subsequent use, reduce communication interruption rate.
In communication process, primary user to the use of frequency spectrum (access, switch), the switching of secondary user and the triangular priority level of initial access of secondary user is: primary user is to the initial access of switching > the user of the use of frequency spectrum (access, switch) > user.
Suppose that certain cognition wireless network comprises multiple wireless access type technology: wireless access type 1, wireless access type 2, wireless access type 3, wireless access type 4 ... (as GSM, LTE, WIFI, WIMAX...).
Below, the cut-in method of the cognitive user of radio switch-in method in the cognition wireless network relate to invention and the idle frequency in the authoring system of cognition network is described, and its access process figure as shown in Figure 1.
Step 1: cognitive user is carried out synchronous with cognitive pilot channel, and use self-contained technology (as GPS, but being not limited to GPS) to position, be expressed as (longitude, latitude).
Step 2: cognitive user sends cognitive pilot tone message request to cognitive base station on cognitive pilot channel up channel, and carry oneself positional information and user identification code (can be registered user ID, or the request code etc. of user's stochastic generation), format sample is as shown in table 1, but is not limited to following form.
The cognitive pilot request message format of table 1
Step 3: cognitive base stands in the cognitive pilot tone access assistance messages cognitive pilot channel down channel sending corresponding mesh to terminal, cognitive user is monitored and is received the response of base station on cognitive pilot tone down channel, and cognitive pilot tone response message format example is as shown in table 2.
The cognitive pilot tone response message format of table 2
Step 4: cognitive user to start in the list of cognitive pilot tone access assistance messages the several available free frequency of Stochastic choice under same wireless access type according to self-contained wireless access type preference priority list and assesses.Search cell near these available frequencies, measure signal intensity, attempts carrying out PLMN selection, wireless access type is selected, community is selected with resident.If community is selected unsuccessful under this wireless access type, then according to wireless access type priority list, select next wireless access type, attempt at the available free frequency of next wireless access type.If what select is not the wireless access type of limit priority, so to first reshuffle before carrying out Cell searching.On cognitive pilot channel, resource is reshuffled in application, downloads corresponding agreement and carries out terminal and reshuffle.Carry out reshuffling in terminal and effectively can utilize existing base station facility, do not need the base station facility that any wide-area deployment is new, and, utilize existing protocol to communicate, can implementation complexity be reduced.
Step 5: after cognitive user resides in certain community, hold period ground to measure cell signal strength, judges whether to carry out cell reselection, ensure to reside in the best community of service quality all the time.
Step 6: subsequently, cognitive user to cognitive base station initiating random access procedure, establishes the link with cognitive base station on resident frequency.A Stochastic accessing check code is arranged to each cognitive user in cognitive base station, and all users are arranged to the content of identical accidental access response, only having is undertaken decoding by Stochastic accessing check code obtains correct accidental access response, and user sets up just success with linking of base station.Multiple user is carried out to the situation of Stochastic accessing simultaneously, only have that cognitive user of asking the earliest to obtain successfully decoded.Do not obtain other cognitive user then random access failure be correctly decoded, to trigger under the frequency catalogue of other users same wireless access type in up-to-date cognitive pilot tone access message again Stochastic choice from before different frequency again carry out Stochastic accessing.The user of random access failure specifies according to existing protocol, initiating random access procedure again after waiting for a period of time.
Step 7: after the success of cognitive user Stochastic accessing, to the successful message of cognitive base station feedback Stochastic accessing.After cognitive base station receives the successful message of Stochastic accessing, just trigger it and distribute corresponding ascending resource to cognitive user, in cognitive pilot tone access message, select frequency resource and upgrade available free frequency point sets, ascending resource allocation result being informed cognitive user simultaneously.
Step 8: when there being downlink data to arrive, cognitive user to cognitive user allocation of downlink resource, and is informed in cognitive base station.
As described above, cognitive user just can access the idle frequency in the authoring system of cognition network smoothly.
But, due to the time variation of spectrum environment, after cognitive user access cognition network, likely have the situation that primary user occurs or the frequency service quality that accesses declines, at this moment, need to carry out frequency spectrum switching.
Below, the frequency spectrum switching method of the cognitive user of radio switch-in method in the cognition wireless network relate to invention and the idle frequency in the authoring system of cognition network is described, and its frequency spectrum switching flow figure as shown in Figure 2.
Step 9: after cognitive user access cognition network, judge whether the frequency that cognitive user uses has primary user to occur by cognitive base standing-meeting according to the frequency spectrum perception result merged, monitor the service quality of cognitive user communication simultaneously.To occur or the service quality of cognitive user drops to certain threshold value once monitor primary user, just trigger frequency spectrum handoff procedure.
Step 10: cognitive base station informs that cognitive user prepares to switch, and stops business transmission.Cognitive user waits for cognitive base station handover decisions.
Step 11: cognitive base station is searched in the list of cognitive pilot tone switching assistance messages according to the wireless access type of the current use of cognitive terminal, selects the target switching frequency that suitable.If the available free frequency spectrum set under current wireless access style is empty, then according to present terminal business transport-type, select the available free frequency spectrum in other wireless access type.
Step 12: handover decisions result is informed terminal by cognitive base station.If wireless access type type is constant, then cognitive base stands on target frequency and carries out Stochastic accessing, stands in target switch on frequency and establish the link with cognitive base.If wireless access type changes, then base station notice cognitive user first on cognitive pilot channel application reshuffle resource, download corresponding agreement and carry out terminal and reshuffle.After reshuffling end, then start to search for target frequency, carry out Stochastic accessing, re-establish and the linking of base station.
Step 13: after frequency spectrum has switched, cognitive base station is that cognitive user distributes new up and downlink resource, and informs user, the business do not completed before having continued switching.
Step 14: link after setting up in cognitive base station with cognitive user, according to the frequency spectrum handoff procedure of the idle frequency in the authoring system of this cognitive user and cognition network, repeated execution of steps 9-step 13.
The above method is all under prerequisite primary user not being caused to interference, the frequency spectrum that the available free frequency spectrum that cognitive user waits for an opportunity to use authoring system carries out when the access control that communicates and primary user occur is made a concession and the implementation procedure switched, and effectively can improve the availability of frequency spectrum.Meanwhile, by reserving part available free frequency spectrum, ensure reliability and the continuity of time telex network.Assist frequency spectrum perception and frequency spectrum access by cognitive pilot tone message, efficiently avoid cognitive user need into power consumption when selecting network insertion and wide-band consuming time scanning with assess.
Claims (13)
1. the radio switch-in method in a cognition wireless network, the idle frequency of cognitive pilot channel accessory terminal insertion authority system is utilized for the cognitive user in cognition wireless network, it is characterized in that, described wireless method also comprises: frequency spectrum switch step, occur for primary user or the service quality of cognitive user drops to certain threshold value time be switched to other idle frequencies from current frequency;
Wherein, the idle frequency of described insertion authority system specifically comprises the following steps:
Step 1, cognitive user and described cognitive pilot channel synchronization, and use self-contained technology to position;
Step 2, cognitive user, on the up channel of described cognitive pilot channel, send cognitive pilot request message to cognitive base station, and carry oneself positional information and user identification code;
Step 3, cognitive base stand on the down channel of described cognitive pilot channel, send the cognitive pilot tone access assistance messages of corresponding mesh to terminal;
Step 4, cognitive user are assessed the wireless access type preferred list that the available free frequency in described access assistance messages carries according to terminal, and complete public land mobile network selection, cell selection operation;
Behind step 5, cognitive user certain community resident, hold period judges whether to carry out cell reselection operation, ensures to reside in the best community of service quality;
Step 6, cognitive user are to cognitive base station initiating random access procedure on resident frequency, and cognitive base station sends accidental access response to cognitive user, thus cognitive user and cognitive base station are established the link;
Step 7, cognitive base station are that cognitive user distributes ascending resource;
Step 8, cognitive base station are cognitive user allocation of downlink resource.
2. the radio switch-in method in cognition wireless network as claimed in claim 1, it is characterized in that, described frequency spectrum switch step specifically comprises the following steps:
Step 9, cognitive base station detect primary user's active situation and cognitive user communication quality, adjudicate and switch the need of frequency spectrum;
Step 10, cognitive base station triggers frequency spectrum switch, and inform that cognitive user stops business, cognitive user waits for handover decisions;
The wireless access type select target of the terminal that step 11, cognitive base station are carried according to cognitive user switches frequency;
The target of selection is switched frequency and informs terminal by step 12, cognitive base station, and terminal switches in target and frequency re-establishes and the linking of base station;
Step 13, cognitive base station are that cognitive user distributes ascending resource and downlink resource, the transformation task do not completed before having continued switching.
3. the radio switch-in method in cognition wireless network as claimed in claim 1 or 2, it is characterized in that, described terminal configuration has the list of wireless access type preference priority.
4. the radio switch-in method in cognition wireless network as claimed in claim 1, is characterized in that, described cognitive pilot channel is divided into two special channels as cognitive pilot tone up channel and cognitive pilot tone down channel.
5. the radio switch-in method in cognition wireless network as claimed in claim 1 or 2, it is characterized in that, the terminal of being carried by cognitive user and cognitive base station have cooperated to the frequency spectrum perception process of the idle frequency of authoring system in wireless cognition net, are determined the working frequency points of terminal by cognitive base station according to sensing results.
6. the radio switch-in method in cognition wireless network as claimed in claim 1, it is characterized in that, there is available free frequency spectrum in described cognitive pilot request message, and be divided into by the available free frequency spectrum in described cognitive pilot request message cognitive pilot tone to access assistance messages and cognitive pilot tone switching assistance messages; Described cognitive pilot tone access assistance messages and described cognitive pilot tone switch assistance messages and synchronously upgrade, and these two set do not have clearly boundary, flexibility and changeability, but the set that described cognitive pilot tone switches assistance messages can not be empty.
7. the radio switch-in method in cognition wireless network as claimed in claim 1, it is characterized in that, in step 3, the form of spectrum information by cognitive pilot tone response message is organized by cognitive base station, the form of described cognitive pilot tone response message is different " mesh#ID:Operator#i, RAT#j, frequency#k ... " combination, its intermediate-frequeney point is only enumerate available idle frequency, or the state to be used by primary user for each frequency, other information on each frequency can also be comprised in described cognitive pilot tone response message, and described cognitive pilot tone response message constantly upgrades according to up-to-date frequency spectrum perception fusion results.
8. the radio switch-in method in cognition wireless network as claimed in claim 1, it is characterized in that, in step 4, if community is selected unsuccessful under this wireless access type, then according to wireless access type priority list, select next wireless access type, attempt at the available free frequency of next wireless access type.
9. the radio switch-in method in cognition wireless network as claimed in claim 1, it is characterized in that, in step 4, if what select is not the wireless access type of limit priority, so to first reshuffle before carrying out Cell searching, on cognitive pilot channel, resource is reshuffled in application, downloads corresponding agreement and carries out terminal and reshuffle.
10. the radio switch-in method in cognition wireless network as claimed in claim 1, it is characterized in that, in the random access procedure of step 6, a Stochastic accessing check code is arranged to each cognitive user in cognitive base station, and all users are arranged to the content of identical accidental access response, only having is undertaken decoding by described Stochastic accessing check code obtains correct accidental access response, and user sets up just success with linking of base station.
Radio switch-in method in 11. cognition wireless networks as claimed in claim 1, it is characterized in that, in the random access procedure of step 6, multiple user is carried out simultaneously to the situation of Stochastic accessing, only have that cognitive user of asking the earliest to obtain successfully decoded, do not obtain other cognitive user then random access failure be correctly decoded.
Radio switch-in method in 12. cognition wireless networks as claimed in claim 2, it is characterized in that, in a step 11, if the available free frequency spectrum set under current wireless access style is empty, then according to present terminal business transport-type, select the available free frequency spectrum in other wireless access type.
Radio switch-in method in 13. cognition wireless networks as claimed in claim 2, is characterized in that, in step 12, if cognitive user access or when to be switched to terminal on the different wireless access type of existing configuration, needs first to reshuffle terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310344221.6A CN103428708B (en) | 2013-08-08 | 2013-08-08 | Radio switch-in method in a kind of cognition wireless network and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310344221.6A CN103428708B (en) | 2013-08-08 | 2013-08-08 | Radio switch-in method in a kind of cognition wireless network and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103428708A CN103428708A (en) | 2013-12-04 |
| CN103428708B true CN103428708B (en) | 2016-03-16 |
Family
ID=49652728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310344221.6A Active CN103428708B (en) | 2013-08-08 | 2013-08-08 | Radio switch-in method in a kind of cognition wireless network and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103428708B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6429207B2 (en) | 2014-02-28 | 2018-11-28 | ホアウェイ・テクノロジーズ・カンパニー・リミテッド | Method for performing communications using unlicensed spectrum, devices, and systems |
| CN103957606A (en) * | 2014-05-23 | 2014-07-30 | 国网四川省电力公司信息通信公司 | Data transmission method based on electric power telecommunication system |
| JP2017532802A (en) * | 2014-07-25 | 2017-11-02 | ゼットティーイー （ユーエスエー） インコーポレイテッド | Power sharing radio resource method and apparatus conscious of radio communication energy |
| CN105323765B (en) * | 2014-07-30 | 2018-11-23 | 普天信息技术有限公司 | A kind of method for distributing frequency band sources |
| WO2016101284A1 (en) * | 2014-12-27 | 2016-06-30 | 华为技术有限公司 | Method and device for using unlicensed frequency spectrum |
| CN106304091B (en) * | 2015-05-15 | 2022-06-14 | 索尼公司 | Method and apparatus for frequency allocation of unlicensed frequency bands |
| WO2019010713A1 (en) * | 2017-07-14 | 2019-01-17 | 深圳前海达闼云端智能科技有限公司 | Method, device, and base station for terminal switching, and storage medium |
| CN107318150B (en) * | 2017-07-28 | 2019-09-06 | 浙江大学 | A kind of resident process of the user of LTE-U autonomous system |
| WO2019075763A1 (en) * | 2017-10-20 | 2019-04-25 | Oppo广东移动通信有限公司 | Data transmission method, terminal device, and network device |
| KR20200081455A (en) | 2017-11-13 | 2020-07-07 | 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 | Cell selection method, terminal device and network device |
| CN111031572B (en) * | 2018-10-09 | 2022-04-29 | 华为技术有限公司 | Data transmission method and device |
| CN109729561B (en) * | 2019-02-22 | 2020-12-22 | 重庆邮电大学 | Spectrum switching method in cognitive heterogeneous radio network |
| CN110492955B (en) * | 2019-08-19 | 2021-11-23 | 上海应用技术大学 | Spectrum prediction switching method based on transfer learning strategy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702635A (en) * | 2009-10-28 | 2010-05-05 | 北京邮电大学 | Method for switching frequency spectrum based on cognitive radio technology and system thereof |
| CN102223694A (en) * | 2010-04-16 | 2011-10-19 | 华为技术有限公司 | Cognitive system initialization method, device and system for perceiving pilot frequency channel |
| CN102724711A (en) * | 2011-03-31 | 2012-10-10 | 中国联合网络通信集团有限公司 | Access method of Internet of things terminal, device thereof and Internet of things terminal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1802152B1 (en) * | 2005-12-20 | 2009-05-27 | Nokia Siemens Networks Gmbh & Co. Kg | Call set-up in radio communication systems |
-
2013
- 2013-08-08 CN CN201310344221.6A patent/CN103428708B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702635A (en) * | 2009-10-28 | 2010-05-05 | 北京邮电大学 | Method for switching frequency spectrum based on cognitive radio technology and system thereof |
| CN102223694A (en) * | 2010-04-16 | 2011-10-19 | 华为技术有限公司 | Cognitive system initialization method, device and system for perceiving pilot frequency channel |
| CN102724711A (en) * | 2011-03-31 | 2012-10-10 | 中国联合网络通信集团有限公司 | Access method of Internet of things terminal, device thereof and Internet of things terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103428708A (en) | 2013-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103428708B (en) | Radio switch-in method in a kind of cognition wireless network and system | |
| US10257762B2 (en) | System and method for wireless network access map and applications | |
| EP3193538B1 (en) | Network access method, mobile communication terminal, network server, and network access system | |
| US8379586B2 (en) | Method and apparatus for radio coexistence | |
| CN104412664B (en) | Wi-Fi network connection method, Wi-Fi controller and Wi-Fi equipment | |
| CN107466090B (en) | Access point, wireless terminal, storage medium and method for communicating in available channels using pointer signals | |
| US20140071854A1 (en) | System and Methods for Dual Mode Network Selection | |
| US9319970B2 (en) | Method, apparatus, and system for searching and selecting network | |
| US9572190B2 (en) | Device and method for associating with WiFi networks | |
| US20140071942A1 (en) | Apparatuses, systems, and methods for offloading data traffic | |
| JP2006100992A (en) | Mobile communication terminal unit and frequency detection method thereof | |
| CN103561449A (en) | Wireless access method and wireless access point | |
| CN105308908A (en) | Reducing network service scan time by a wireless communication device | |
| US10111164B2 (en) | Wireless communication system and wireless communication method | |
| WO2013131234A1 (en) | Methods, apparatuses, and computer-readable storage media for relaying traffic in d2d communications | |
| CN105165068A (en) | Entity and a method of operating an entity of a wireless local area network | |
| US9344879B2 (en) | Method of managing at least one wireless communications interface of a terminal, and a terminal | |
| CN104105200A (en) | WLAN AP (wireless local area network access point) notification and scanning method and device | |
| CN105191427A (en) | Method for operating a mobile device | |
| JP2017538348A (en) | Method and apparatus for selecting and activating network node | |
| CN107295602B (en) | A kind of system and its implementation controlling WiFi network connection priority | |
| CN112449305B (en) | WiFi connection method, control method, mobile terminal, equipment and server | |
| US20150237466A1 (en) | Radio access system, controlling apparatus, and terminal apparatus | |
| US10313896B2 (en) | Communication system and radio terminal | |
| CN105101336A (en) | Wi-Fi access method and apparatus, mobile terminal, and server |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180629 Address after: 450003 Luoyang, Henan Province, Luoyang, Yibin road and science and technology Avenue intersection East 100 meters "Internet +" crowd creation space Luoyang middle section of the 201 room Patentee after: Luoyang Zhongke smart equipment Technology Co., Ltd. Address before: 100190 South Road, Zhongguancun Science Academy, Haidian District, Beijing 6 Patentee before: Institute of Computing Technology, Chinese Academy of Sciences |