CN103916931A - Terminal access method, large base station, small base station, terminal and system for heterogeneous network - Google Patents
Terminal access method, large base station, small base station, terminal and system for heterogeneous network Download PDFInfo
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- CN103916931A CN103916931A CN201310002396.9A CN201310002396A CN103916931A CN 103916931 A CN103916931 A CN 103916931A CN 201310002396 A CN201310002396 A CN 201310002396A CN 103916931 A CN103916931 A CN 103916931A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a terminal access method, a large base station, a small base station, a terminal and a system for a heterogeneous network. The method comprises the steps that when the small base station in a dormant state turns into a detection state, the large base station and/or the small base station in an activated state can confirm detection state resource information; the terminal can establish downlink synchronization with the large base station and/or the small base station in the activated state to obtain the detection state resource information; the terminal can send out uplink detection signals according to the detection state resource information; the large base station and/or the small base station in the activated state can confirm an access base station of the terminal according to the uplink detection signals and send the access information of the access base station to the terminal; the terminal has access to the access base station according to the access information. According to the terminal access method, the large base station, the small base station, the terminal and the system for the heterogeneous network, the signaling overhead for the small base station to send pilot frequency is saved, the extra signaling overhead for the terminal to additionally poll and measure the small base station is reduced, the energy consumption of base stations and the terminal is reduced, and the access efficiency for the terminal to have access to the base station is improved.
Description
Technical field
The present invention relates to wireless technical field in the communications field, particularly, relate to the terminal access method of heterogeneous network, large base station, little base station, terminal and system.
Background technology
Along with the development of radio network technique, there is heterogeneous network (Heterogeneous Network, hereinafter to be referred as HetNet) system, in heterogeneous network, comprise different wireless networks.For example, in mobile communications network, due to the difference of service distribution time domain and region, carrying out in the network coverage, often have the common situation covering in large (grand) base station and little (micro-) base station.
As shown in Figure 1, wherein Cell A, Cell B is the large base station that wide area covers, and basic service is provided.In the region that Cell A covers, have the little base station of Cell C/D/E, in the region that Cell B covers, there will be the Multiple Small Cell Sites such as Cell F/G, wherein the standard of Yu little base station, large base station do not require identical.In order to obtain the targets such as energy-conservation, in the time that little base station business is around very low, little the part in Cell C/D/E/F/G base station can be closed; In the time that traffic carrying capacity increases, one or several in can selectively unlocking Cell C/D/E/F/G.How in above-mentioned HetNet scene, realizing optimum little base station and the optimum user's access scheme opened, is very complicated problem.
In existing 3GPP, there is the little base station running scheme of multiple correspondence, for example:
1) based on OAM(network operation, management, maintenance) scheme, large base station, according to the low duty cycle of the little base station of information configuration of OAM, is closed in little base station of low duty cycle, opens in At All Other Times little base station.
2) compare the interference of thermal noise based on IOT() scheme, in the time that the load of large base station exceedes certain threshold value, can open the little base station of notification section, carry out measurement and the feedback of up IOT, large base station judges that according to the measurement result of feedback which little base station needs to open.
3) be terminal based on UE() measure little base station running scheme, in this scheme, there is three state each little base station: resting state (now stopping radio-frequency transmissions), acquisition mode (now little base station transmitting pilot tone, reference signal or broadcast singal carry out descending detection for UE) and state of activation.
The workflow of existing scheme is:
1,, in the time that large base station (being macro base station) traffic carrying capacity exceedes certain thresholding, large base station initiated little base station enters acquisition mode;
2, the descending transmission reference signal of state is being surveyed in little base station;
3, large base station sends and measures request command (according to the standard of the ability of UE and little base station) to UE;
4, then UE feeds back according to measuring the descending reference signal of request measurement;
5, the situation that large base station is measured according to the UE receiving is determined the little base station that need open.
Realizing in process of the present invention, inventor finds that in prior art, at least there are the following problems:
1, not very accurate based on OAM and the scheme based on IOT, because be not according to the measurement of up-downgoing channel.
2, in the scheme of measuring based on UE, little base station need to increase an acquisition mode, and under large base station, all little base stations all need to enter this state:
A), owing to needing to open radiofrequency emitting module under this state, therefore little base station has increased extra power consumption.
B), survey time of state and more difficultly determine, oversize little base station transmitting power consumption is large; Too short due to UE capabilities limits, measurement result may not be accurate.
C), because UE has additionally increased measuring process, increased the power consumption of UE.
3, in the above in two schemes, be all first to judge to need the base station of opening, then base station enters activated state, carries out the switching of certain customers, and the access of new terminal etc.That is to say that the unlatching of little base station and the access of terminal and handoff procedure are independently, be not optimized fusion.
Summary of the invention
The present invention is the defect that the random access of unlatching in order to overcome the medium and small base station of prior art and terminal cannot effective integration, according to an aspect of the present invention, proposes a kind of terminal access method of heterogeneous network.
According to the terminal access method of the heterogeneous network of the embodiment of the present invention, comprising:
When enter detection state in the little base station of resting state, detection state resource information is determined in large base station and/or the little base station in state of activation;
Terminal is with large base station and/or set up down-going synchronous in the little base station of state of activation, knows and surveys state resource information;
Terminal sends uplink detection signal according to surveying state resource information;
The access base station of terminal is determined in large base station and/or the little base station in state of activation according to uplink detection signal, and the access information of access base station is handed down to terminal;
Terminal accesses access base station according to access information.
The present invention is the defect that the random access of unlatching in order to overcome the medium and small base station of prior art and terminal cannot effective integration, according to another aspect of the present invention, proposes a kind of terminal connecting system of heterogeneous network.
According to the terminal connecting system of the heterogeneous network of the embodiment of the present invention, comprising:
Large base station, for when enter detection state in the little base station of resting state, determines and surveys state resource information, determines the access base station of terminal, and the access information of access base station is handed down to terminal according to uplink detection signal; And/or,
In the little base station of state of activation, for when enter detection state in the little base station of resting state, determine and survey state resource information, determine the access base station of terminal according to uplink detection signal, and the access information of access base station is handed down to described terminal;
Terminal, for setting up down-going synchronous with large base station and/or in the little base station of state of activation, knows and surveys state resource information, sends uplink detection signal according to surveying state resource information, according to access information access access base station.
The present invention is the defect that the random access of unlatching in order to overcome the medium and small base station of prior art and terminal cannot effective integration, according to another aspect of the present invention, proposes a kind of large base station of heterogeneous network.
According to the large base station of the heterogeneous network of the embodiment of the present invention, comprising:
Information determination module, for when enter detection state in the little base station of resting state, determines and surveys state resource information;
Base station determination module, for determining the access base station of terminal according to the uplink detection signal of terminal transmission;
Information issues module, for the access information of access base station is handed down to terminal.
The present invention is the defect that the random access of unlatching in order to overcome the medium and small base station of prior art and terminal cannot effective integration, according to another aspect of the present invention, proposes a kind of little base station in state of activation of heterogeneous network.
According to the little base station in state of activation of the heterogeneous network of the embodiment of the present invention, comprising:
Information determination module, for when enter detection state in the little base station of resting state, determines and surveys state resource information;
Base station determination module, for determining the access base station of terminal according to the uplink detection signal of terminal transmission;
Information issues module, for the access information of access base station is handed down to terminal.
The present invention is the defect that the random access of unlatching in order to overcome the medium and small base station of prior art and terminal cannot effective integration, according to another aspect of the present invention, proposes a kind of terminal of heterogeneous network.
According to the terminal of the heterogeneous network of the embodiment of the present invention, comprising:
Synchronously set up module, for setting up down-going synchronous with large base station or in the little base station of state of activation;
Signal transmitting module, surveys state resource information for knowing, sends uplink detection signal according to surveying state resource information;
Base station access module, for accessing access base station according to the access information of best access base station.
The terminal access method of heterogeneous network of the present invention, large base station, little base station, terminal and system, determine identical detection state resource information by He little base station, large base station, the up channel of measuring terminals accurately, thereby best access base station is opened and is accessed in optimum decision, save the signaling consumption of little base station transmitting pilot tone, also reduced terminal is additionally carried out poll and measurement extra signaling consumption to little base station, reduce the energy consumption of base station and terminal, improved the access efficiency of terminal to base station.
The terminal access method of heterogeneous network of the present invention and system, terminal first down-going synchronous arrives the strongest base station of signal, then uplink synchronous is to best base station, the initial access of the unlatching of the little base station of dormancy and terminal and handoff procedure are effectively merged and, the base station that makes disposable access the best of terminal of initial access, the terminal of switching also can disposablely be switched to best base station.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the present invention.Object of the present invention and other advantages can be realized and be obtained by specifically noted structure in write specification, claims and accompanying drawing.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, for explaining the present invention, is not construed as limiting the invention together with embodiments of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of HetNet system in prior art;
Fig. 2 is the schematic flow sheet of the terminal access method of heterogeneous network of the present invention;
Fig. 3 is the structural representation of the terminal connecting system of heterogeneous network of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.
Basic assumption of the present invention:
1, large base station (being macro base station) coverage is greater than little base station (being micro-base station), and open all the time large base station, and little base station is according to service dynamic adjust operation state.
2, the running status of little base station comprises: dormant state, detection state and activated state, and while not having business or business demand very low, little base station is in dormant state; According to certain trigger condition, little base station transfers detection state to from dormant state, and little base station, surveying the uplink reference signals that state can receiving terminal, also can send downlink reference signal; If the demand of business is enough large, little base station can transfer activated state to from surveying state.
3, in mobile communication system (hereinafter to be referred as system), the base station of above-mentioned different running statuses can exist simultaneously.
In the present invention, big or small base station judges whether to open the little base station of dormancy according to the traffic carrying capacity of self, and the little base station of part enters detection state; In system, have the terminal of initial connecting system and need the terminal of switching, for this terminal, He little base station, large base station (in surveying state or activated state) determines best access base station through consultation.Object of the present invention is exactly to make the unlatching of dormancy base station and switch effectively to merge, and makes the best access base station of the disposable access of terminal of initial access, the best access base station of the disposable access of terminal of switching.
In the present invention, the random access of terminal comprises following situation:
1, the conversion of the state from RRC-IDLE state to RRC-CONNECT, i.e. RRC connection procedure, for example initial access and TAU(tracking area update, service area upgrades) upgrade;
2, the initial access after Radio Link Failure, i.e. RRC connection reconstruction process;
3,, at RRC-CONNECTED state, need to send upstream data and control information or uplink loss but need by random access application ascending resource not though do not obtain uplink synchronous;
4, at RRC-CONNECTED state, be switched to Target cell from Serving cell;
5,, at RRC-CONNECTED state, do not obtain uplink synchronous but need downlink data receiving;
6, at RRC-CONNECTED state, UE location aided rebroadcast location needs, and network utilisation accesses acquisition time lead (TA:Timing Advance) at random.
According to embodiment, the invention discloses a kind of terminal access method of heterogeneous network, as shown in Figure 2, comprising:
Step 1, large base station and/or the little base station in state of activation judge whether to open the little base station of dormancy according to the traffic carrying capacity of self, in the time that traffic carrying capacity is greater than thresholding separately, large base station and/or little base station are opened signaling by X2 interface or other interface to the little base station transmission in resting state;
Step 2, the little base station of dormancy is received and is opened after signaling, enters detection state, is used for receiving up terminal signaling;
Step 3, large base station and/or the little base station in state of activation are determined identical detection state resource information through consultation, comprise: survey state time resource, uplink detection signal resource (time, the frequency resource etc. that take as detectable signal) and detectable signal, wherein, detectable signal can be uplink random access signal;
Step 4, need the terminal of random access to detect downlink synchronous signal and the broadcast channel of near peripheral base station, down-going synchronous is carried out in the base station (BS1) corresponding with the strongest downstream signal, from the base station that has authority to access, select and record the downlink synchronous signal that top n is the strongest simultaneously, and the method for synchronization (frequency, time synchronized parameter etc.;
It should be noted that, above-mentioned BS1 can be both large base station, can be also little base station.
Step 5, the distribution condition of all terminals (comprising the terminal of the random access of needs) detection state time resource, uplink detection signal resource and detectable signal etc. is informed in all large base stations and/or the little base station in state of activation by broadcast mode;
Step 6, need the terminal of random access at the upper uplink detection signal that sends of predefined detection state resource (as detection state time resource, uplink detection signal resource and the detectable signal of terminal acquisition in step 5), uplink detection signal comprises base station IDs corresponding to a strongest N descending synchronous signal channel;
Step 7 receives uplink detection signal in the little base station of surveying state, and this uplink detection signal is sent in large base station and the little base station in state of activation in above-mentioned predefined resource;
Step 8, hold consultation and judge best access base station BSbest according to the uplink detection signal receiving in large base station and/or the little base station in state of activation;
In step 8, base station and/or the little base station in state of activation judge best access base station according to the intensity of the uplink detection signal receiving separately greatly: if exceed certain threshold value, think that this base station may serve as best access base station, while is in conjunction with the utilization of resources situation of each base station, the base station that for example upward signal is strong may not have remaining resource to access this terminal, whether terminal has the situations such as authority access, judges which base station is best access base station.
Step 9, BS1 informs the ID of the best access base station of terminal by the Msg2 of random access, Msg2 comprises: the up parameter adjustment information of best access base station and best access base station are distributed to the ascending resource information of terminal, and upper line parameter comprises: power, frequency and time;
It should be noted that, the best access base station in above-mentioned steps 8 and 9 may be both large base station, may be also little base station, and little base station may be both the little base station in surveying state, also may be in the little base station of state of activation;
Step 10, if best access base station is little base station, large base station notifies this little base station (best access base station) to enter activated state;
Step 11, terminal, according to the Msg2 of BS1, completes descending and up the synchronizeing with BSbest;
Step 12, terminal sends Msg3 to BSbest;
Step 13, BSbest sends Msg4 to terminal, completes the access of network system.
In above-mentioned steps 11-13, the implication of Msg1-Msg4 following (referring to table 1):
Msg1: send Preamble code, Msg1 is carried on PRACH;
Msg2: i.e. accidental access response, Msg2 is by the MAC layer tissue of eNB, and carried by DL_SCH.Article one, Msg2 can respond the random access request of multiple UE simultaneously, eNB uses PDCCH scheduling Msg2, and carry out addressing by RA-RNTI, RA-RNTI is by the PRACH running time-frequency resource location positioning that carries Msg1, ascending resource, interim C-RNTI etc. that Msg2 comprises uplink Timing Advance, distributes for Msg3;
Msg3: i.e. scheduled transmission for the first time, UE, receiving after Msg2, transmits Msg3 on the ascending resource of its distribution, and for different scenes, Msg3 comprises different contents:
1) initially access: carry the RRC connection request that rrc layer generates, the S-TMSI that comprises UE or random number;
2) connection reconstruction: carry the RRC connection reconstruction request that rrc layer generates, C-RNTI and PCI;
3) switch: the RRC handoff completion message that transmission rrc layer generates and the C-RNTI of UE;
4) up/down row data arrive: the C-RNTI of transmission UE.
Msg4: i.e. competition solves.
Table 1
The terminal access method of heterogeneous network of the present invention, determine identical detection state resource information by He little base station, large base station, the up channel of measuring terminals accurately, thereby best access base station is opened and is accessed in optimum decision, save the signaling consumption of little base station transmitting pilot tone, also reduce terminal is additionally carried out poll and measurement extra signaling consumption to little base station, reduced the energy consumption of base station and terminal, improved the access efficiency of terminal to base station.
The terminal access method of heterogeneous network of the present invention, terminal first down-going synchronous arrives the strongest base station of signal, then uplink synchronous is to best base station, the initial access of the unlatching of the little base station of dormancy and terminal and handoff procedure are effectively merged and, the base station that makes disposable access the best of terminal of initial access, the terminal of switching also can disposablely be switched to best base station.
As shown in Figure 3, be the structural representation of the terminal connecting system of heterogeneous network of the present invention, comprising:
Large base station 10, for when enter detection state in the little base station of resting state, determines and surveys state resource information, determines the access base station of terminal, and the access information of access base station is handed down to terminal 30 according to uplink detection signal; And/or,
In the little base station 20 of state of activation, for when enter detection state in the little base station of resting state, determine and survey state resource information, determine the access base station of terminal according to uplink detection signal, and the access information of access base station is handed down to terminal 30;
Terminal 30, for setting up down-going synchronous with large base station and/or in the little base station of state of activation, knows and surveys state resource information, sends uplink detection signal according to surveying state resource information, according to access information access access base station.
Wherein: large base station and/or the little base station in state of activation determine that according to uplink detection signal the access base station of terminal is best access base station.
Wherein: terminal 30, set up down-going synchronous specifically for the strongest access base station corresponding with the strongest downstream signal.
Wherein: large base station 10, specifically for determining identical detection state time resource information, uplink detection signal resource information and detectable signal information; And/or,
In the little base station 20 of state of activation, specifically for determining identical detection state time resource information, uplink detection signal resource information and detectable signal information.
Wherein: terminal 30 is the terminal of random access.
Wherein: system also comprises: in surveying the little base station 40 of state, for receiving uplink detection signal, and uplink detection signal is sent in large base station and/or the little base station in state of activation.
Wherein: the access information of access base station comprises: the up parameter adjustment information of access base station and access base station are distributed to the ascending resource information of terminal.
According to the embodiment of the present invention, a kind of large base station of heterogeneous network is disclosed, comprising:
Information determination module, for when enter detection state in the little base station of resting state, determines and surveys state resource information;
Base station determination module, for determining the access base station of terminal according to the uplink detection signal of terminal transmission;
Information issues module, for the access information of access base station is handed down to terminal.
Wherein: base station determination module determines that the access base station of terminal is best access base station.
Wherein: information determination module, specifically for determining identical detection state time resource information, uplink detection signal resource information and detectable signal information.
Wherein: the access information of access base station comprises: the up parameter adjustment information of access base station and access base station are distributed to the ascending resource information of terminal.
According to the embodiment of the present invention, a kind of little base station in state of activation of heterogeneous network is disclosed, comprising:
Information determination module, for when enter detection state in the little base station of resting state, determines and surveys state resource information;
Base station determination module, for determining the access base station of terminal according to the uplink detection signal of terminal transmission;
Information issues module, for the access information of access base station is handed down to terminal.
Wherein: base station determination module determines that the access base station of terminal is best access base station.
Wherein: information determination module, specifically for determining identical detection state time resource information, uplink detection signal resource information and detectable signal information.
Wherein: the access information of access base station comprises: the up parameter adjustment information of access base station and access base station are distributed to the ascending resource information of terminal.
According to the embodiment of the present invention, a kind of terminal of heterogeneous network is disclosed, comprising:
Synchronously set up module, for setting up down-going synchronous with large base station or in the little base station of state of activation;
Signal transmitting module, surveys state resource information for knowing, sends uplink detection signal according to surveying state resource information;
Base station access module, for accessing access base station according to the access information of access base station.
Wherein: the access base station of base station access module access is best access base station.
Wherein: synchronously set up module, set up down-going synchronous specifically for the strongest access base station corresponding with the strongest downstream signal.
Wherein: terminal is the terminal of random access.
Wherein: the access information of access base station comprises: the up parameter adjustment information of access base station and access base station are distributed to the ascending resource information of terminal.
The large base station of heterogeneous network of the present invention, little base station, terminal and terminal connecting system, determine identical detection state resource information by He little base station, large base station, the up channel of measuring terminals accurately, thereby best access base station is opened and is accessed in optimum decision, save the signaling consumption of little base station transmitting pilot tone, also reduce terminal is additionally carried out poll and measurement extra signaling consumption to little base station, reduced the energy consumption of base station and terminal, improved the access efficiency of terminal to base station.
The large base station of heterogeneous network of the present invention, little base station, terminal and terminal connecting system, terminal first down-going synchronous arrives the strongest base station of signal, then uplink synchronous is to best base station, the initial access of the unlatching of the little base station of dormancy and terminal and handoff procedure are effectively merged and, the base station that makes disposable access the best of terminal of initial access, the terminal of switching also can disposablely be switched to best base station.
The present invention can have multiple multi-form embodiment; above take Fig. 2-Fig. 3 as example is by reference to the accompanying drawings to technical scheme of the present invention explanation for example; this does not also mean that the applied instantiation of the present invention can only be confined in specific flow process or example structure; those of ordinary skill in the art should understand; the specific embodiments that above provided is some examples in multiple its preferred usage, and the execution mode of any embodiment the claims in the present invention all should be within technical solution of the present invention scope required for protection.
Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (28)
1. a terminal access method for heterogeneous network, is characterized in that, comprising:
When enter detection state in the little base station of resting state, detection state resource information is determined in large base station and/or the little base station in state of activation;
Terminal and described large base station and/or set up down-going synchronous in the little base station of state of activation, know described detection state resource information;
Described terminal sends uplink detection signal according to described detection state resource information;
The access base station of described terminal is determined in described large base station and/or the little base station in state of activation according to described uplink detection signal, and the access information of described access base station is handed down to described terminal;
Described terminal accesses described access base station according to described access information.
2. method according to claim 1, is characterized in that, described large base station and/or the little base station in state of activation determine that according to described uplink detection signal the described access base station of described terminal is best access base station.
3. method according to claim 1, is characterized in that, described terminal and large base station and/or the step of setting up down-going synchronous in the little base station of state of activation comprise: down-going synchronous is set up in the terminal strongest access base station corresponding with the strongest downstream signal.
4. method according to claim 1, is characterized in that, described detection state resource information comprises: survey state time resource information, uplink detection signal resource information and detectable signal information;
Described large base station and/or the little base station in state of activation determine that the step of surveying state resource information comprises:
Described large base station and/or determine identical detection state time resource information, uplink detection signal resource information and detectable signal information in the little base station of state of activation.
5. method according to claim 4, is characterized in that, described detectable signal information comprises uplink random access signal message.
6. method according to claim 1, is characterized in that, sends in the step of uplink detection signal in described terminal according to described detection state resource information, and described terminal is the terminal of random access.
7. method according to claim 1, is characterized in that, also comprises: receive uplink detection signal in the little base station of surveying state, and described uplink detection signal is sent in large base station and/or the little base station in state of activation.
8. according to the method described in any one in claim 1-7, it is characterized in that, the access information of described access base station comprises: the up parameter adjustment information of access base station and access base station are distributed to the ascending resource information of terminal.
9. a terminal connecting system for heterogeneous network, is characterized in that, comprising:
Large base station, for when enter detection state in the little base station of resting state, determines and surveys state resource information, determines the access base station of terminal, and the access information of described access base station is handed down to described terminal according to uplink detection signal; And/or,
In the little base station of state of activation, for when enter detection state in the little base station of resting state, determine and survey state resource information, determine the access base station of terminal according to uplink detection signal, and the access information of described access base station is handed down to described terminal;
Terminal, for setting up down-going synchronous with described large base station and/or in the little base station of state of activation, knows described detection state resource information, sends uplink detection signal according to described detection state resource information, accesses described access base station according to described access information.
10. system according to claim 9, is characterized in that, described large base station and/or the little base station in state of activation determine that according to uplink detection signal the described access base station of terminal is best access base station.
11. systems according to claim 9, is characterized in that, described terminal is set up down-going synchronous specifically for the strongest access base station corresponding with the strongest downstream signal.
12. systems according to claim 9, is characterized in that, described large base station, specifically for determining identical detection state time resource information, uplink detection signal resource information and detectable signal information; And/or,
The described little base station in state of activation, specifically for determining identical detection state time resource information, uplink detection signal resource information and detectable signal information.
13. systems according to claim 9, is characterized in that, described terminal is the terminal of random access.
14. systems according to claim 9, is characterized in that, also comprise:
In surveying the little base station of state, for receiving uplink detection signal, and described uplink detection signal is sent in large base station and/or the little base station in state of activation.
15. according to the system described in any one in claim 9-14, it is characterized in that, the access information of described access base station comprises: the up parameter adjustment information of access base station and access base station are distributed to the ascending resource information of terminal.
The large base station of 16. 1 kinds of heterogeneous networks, is characterized in that, comprising:
Information determination module, for when enter detection state in the little base station of resting state, determines and surveys state resource information;
Base station determination module, for determining the access base station of terminal according to the uplink detection signal of terminal transmission;
Information issues module, for the access information of described access base station is handed down to described terminal.
17. large base stations according to claim 16, is characterized in that, described base station determination module determines that the described access base station of terminal is best access base station.
18. large base stations according to claim 16, is characterized in that, described information determination module, specifically for determining identical detection state time resource information, uplink detection signal resource information and detectable signal information.
19. large base stations according to claim 16, is characterized in that, the access information of described access base station comprises: the up parameter adjustment information of access base station and access base station are distributed to the ascending resource information of terminal.
The little base station in state of activation of 20. 1 kinds of heterogeneous networks, is characterized in that, comprising:
Information determination module, for when enter detection state in the little base station of resting state, determines and surveys state resource information;
Base station determination module, for determining the access base station of terminal according to the uplink detection signal of terminal transmission;
Information issues module, for the access information of described access base station is handed down to described terminal.
21. little base stations according to claim 20, is characterized in that, described base station determination module determines that the described access base station of terminal is best access base station.
22. little base stations according to claim 20, is characterized in that, described information determination module, specifically for determining identical detection state time resource information, uplink detection signal resource information and detectable signal information.
23. little base stations according to claim 20, is characterized in that, the access information of described access base station comprises: the up parameter adjustment information of access base station and access base station are distributed to the ascending resource information of terminal.
The terminal of 24. 1 kinds of heterogeneous networks, is characterized in that, comprising:
Synchronously set up module, for setting up down-going synchronous with large base station or in the little base station of state of activation;
Signal transmitting module, surveys state resource information for knowing, sends uplink detection signal according to described detection state resource information;
Base station access module, for accessing described access base station according to the access information of access base station.
25. terminals according to claim 24, is characterized in that, the access base station of described base station access module access is best access base station.
26. terminals according to claim 24, is characterized in that, the described module of synchronously setting up, sets up down-going synchronous specifically for the strongest access base station corresponding with the strongest downstream signal.
27. terminals according to claim 24, is characterized in that, described terminal is the terminal of random access.
28. according to the terminal described in any one in claim 24-27, it is characterized in that, the access information of described access base station comprises: the up parameter adjustment information of access base station and access base station are distributed to the ascending resource information of terminal.
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