CN105916171A

CN105916171A - Access control method, access device and terminal device

Info

Publication number: CN105916171A
Application number: CN201610190791.8A
Authority: CN
Inventors: 王建中
Original assignee: Shenzhen Jinli Communication Equipment Co Ltd
Current assignee: Shenzhen Jinli Communication Equipment Co Ltd
Priority date: 2016-03-30
Filing date: 2016-03-30
Publication date: 2016-08-31

Abstract

The embodiments of the invention disclose an access control method, an access device and a terminal device. The method is realized through the following steps: a first access device establishing communication connection with a second access device; the first access device obtaining first received signal strength indication (RSSI), wherein the first RSSI is RSSI of a target frequency range, obtained from the second access device, and the target frequency range belongs to a frequency range where the second access device provides service and comprises an unauthorized frequency range; the first access device measuring the target frequency range so as to obtain third RSSI: and according to a ratio of the first RSSI to the third RSSI, determining whether to access the terminal device to the target frequency range. According to the invention, when the unauthorized frequency range is used by use of licensed assisted access, interference caused to terminal devices in the unauthorized frequency range can be avoided.

Description

A kind of connection control method, access device and terminal device

Technical field

The present invention relates to communication technical field, particularly to a kind of connection control method, access device and end End equipment.

Background technology

Along with sharply increasing of message volume, 3G (Third Generation) Moblie partnership projects (Third Generation Partnership Project, 3GPP) authorize frequency spectrum to seem and be increasingly not enough to provide higher network capacity. In order to improve the utilization of frequency spectrum resource further, 3GPP is just discussing how to use with the help of authorizing frequency spectrum Unlicensed spectrum, such as 2.4GHz and 5GHz frequency range.These unlicensed spectrums are presently mainly Wireless Fidelity (Wi-Fi), bluetooth, radar, medical treatment etc. system use.3GPP proposes mandate auxiliary and accesses The concept of (Licensed Assisted Access, LAA), by Long Term Evolution (Long Term Evolution, LTE) help of frequency spectrum is authorized to use unlicensed spectrum.Unlicensed spectrum is that signal energy is not awarded at each Distribution in the frequency of power；Statistical distribution situation can obtain which frequency is these undelegated frequencies fall in Scope, these frequency ranges are unauthorized frequency range.

Unlicensed spectrum can have two kinds of working methods, and one is to supplement descending (Supplemental Downlink, SDL), the most only downlink transfer subframe；Another kind is time division duplex (Time Division Duplex, TDD) pattern, downstream transmission subframe all comprises.

Owing to there being good orthogonality to control interference level in LTE network, so base station and terminal device Between downstream transmission data need not consider around whether have base station or other-end equipment transmitting number According to.LTE network in unauthorized frequency range according to the data transfer mode of LTE network, it will to unauthorized frequency The terminal device of section brings interference greatly.

Summary of the invention

Embodiments provide a kind of connection control method, access device and terminal device, be used for adopting When using unauthorized frequency range with authorizing auxiliary to access, it is to avoid the terminal device of unauthorized frequency range is interfered.

The target of RRM (Radio Resource Management, RRM) is at limited band Under conditions of width, in network wireless user terminal provide quality of service guarantee, its basic point of departure be Network traffic skewness, the characteristic of channel because of channel is weak and interference and fluctuations when, Flexible allocation and dynamically adjustment are wirelessly transferred the available resources of part and network, farthest improve wireless The availability of frequency spectrum, prevents the signaling traffic load that network congestion is the least with holding.The proposition of the present invention is favourable Realization in above-mentioned target.

It should be noted that in inventive embodiments the most described, (whether embodiment of the method is also It is device embodiment), terminal can have received signal strength indicator RSSI (Received Signal Strength Indication, received signal strength indicator, it is called for short RSSI) detection function.Terminal is in some feelings May need to measure the RSSI of community in unlicensed spectrum under condition, and multiple time granularity can be supported Described rssi measurement, exemplary, minimum duration can be 1 OFDM (Orthogonal Frequency Division Multiplexing, OFDM, it is called for short OFDM) symbol, maximum permissible It is 5ms.When carrying out RRM and measuring, if different-frequency measure, it may be necessary to measurement interval measurement gap.During described measurement gap, the receiver of described terminal is cut by Serving cell place carrier frequency Change to the adjacent cell place carrier frequency needing to measure, i.e. stop receiving data and the signaling of described serving BS, The RRM beginning listening for described adjacent cell measures signal；Measuring for the RRM with frequency, small cell exists DRS (Discovery Reference can be sent with 40ms/80ms/160ms for the cycle during off state Signal, finds reference signal, is called for short DRS), to ensure that RRM measures.Even so with frequency RRM Measure, it is also desirable to measure within the 6ms time that specific described DRS sends, i.e. Release-12 The DMTC of middle configuration (DRS Measurement Timing Configuration, DRS measure time configuration, It is called for short DMTC).

Concrete, each subframe can comprise several symbols, and the duration of each subframe can be 1ms, When base station needs subscriber equipment to carry out rssi measurement, measurement configuration message can be generated and be sent to subscriber equipment, Wherein, rssi measurement is divided into frequency rssi measurement and alien frequencies rssi measurement, represents with frequency rssi measurement The RSSI of the carrier frequency on the Serving cell at place measured by subscriber equipment, and alien frequencies rssi measurement represents that user sets The RSSI of the standby carrier frequency measured on non-service cell.Generation measurement configuration message in base station can be carried following At least one of information: include the rssi measurement time period configuration information, measure granularity, pendulous frequency and Measure object identity etc..The configuration information of rssi measurement time period can be with the frequency rssi measurement time period Position or the position of alien frequencies rssi measurement time period.Measure granularity to may be used for drawing each layer one (layer1) rssi measurement value needs the quantity of the symbol measured, and pendulous frequency is the number measuring granularity, Namely need the quantity based on the rssi measurement value measuring the layer one that granulometry goes out drawn.It is right to measure As mark represents the mark needing to measure carrier frequency, measuring object can be all communities on this carrier frequency or portion Dividing community, community can be Serving cell or non-service cell, if cell portion, then measures object Can represent to use the form of cell list cell list, subscriber equipment is carried out according to the community in cell list Rssi measurement.

On the one hand a kind of connection control method is embodiments provided, including:

First access device and the second access device set up communication connection；

Described first access device obtains the first signal strength signal intensity instruction RSSI, and a described RSSI is for from institute Stating the RSSI of the target frequency bands that the second access device obtains, described target frequency bands belongs to described second access and sets The standby frequency range providing service, comprises unauthorized frequency range；

Described first access device measures acquisition the 3rd RSSI to described target frequency bands；

Determine whether to connect described terminal device according to the ratio of a described RSSI and described 3rd RSSI Enter described target frequency bands.

In an optional implementation, determining whether to access described terminal device described target frequency Before Duan, described method also includes:

Described first access device terminal device in described first access device coverage sends described Target frequency bands, receiving the 2nd RSSI, described 2nd RSSI is the described target that described terminal device returns The RSSI of frequency range；

The described ratio according to a described RSSI and described 3rd RSSI determines whether to set described terminal The described target frequency bands of standby access includes:

According to the ratio of a described RSSI Yu described 3rd RSSI, and described 2nd RSSI determines and is No by the described terminal device described target frequency bands of access.

In an optional implementation, described according to a described RSSI and described 3rd RSSI's Ratio, and described 2nd RSSI determine whether by described terminal device access described target frequency bands include:

If described 2nd RSSI is less than first threshold, and the ratio of a described RSSI and described 3rd RSSI Value sets less than predetermined threshold, described second access switched to by described terminal device under described target frequency bands Standby.

In an optional implementation, described described terminal device is switched under described target frequency bands Described second access device include:

If described second access device current time slots is opening, determining that handover delay is less than described mesh Mark frequency range respective channels described opening remaining time after, described terminal device is switched to institute State described second access device under target frequency bands；

Or, if described second access device current time slots is closed mode, activates described second access and set For making described second access device be in opening in current time slots, determining that handover delay is less than described mesh Mark frequency range respective channels described opening remaining time after, described terminal device is switched to institute State described second access device under target frequency bands.

In an optional implementation, described terminal device is being switched under described target frequency bands Before described second access device, described method also includes:

Determine that described first access device load is higher than load threshold, or, determine that described second access sets Standby service priority meets switching scheduling requirement, or, determine that described second access device is interfered And meet dispatching requirement.

In an optional implementation, described first access device obtains the first signal strength signal intensity instruction RSSI includes:

Described first access device obtains described second access device and is currently at closed mode or opens shape The information of state, if described second access device is currently at closed mode, it is determined that a described RSSI is 0。

If described 2nd RSSI is less than first threshold, the ratio of a described RSSI and described 3rd RSSI More than Second Threshold and less than or equal to 1, described first access device jumps to described target frequency bands with described Terminal device communicates.

In an optional implementation, carry out with described terminal device jumping to described target frequency bands Before communication, described method also includes:

Obtain described second access device transmission deadline in described target frequency bands；Described jump to institute State target frequency bands to communicate with described terminal device and include:

Described transmission deadline after, jump to described target frequency bands and lead to described terminal device Letter.

Two aspects embodiments provide a kind of connection control method, including:

Second access device and the first access device set up communication connection；

The first signal strength signal intensity that described second access device sends target frequency bands to described first access device refers to Show that RSSI, described target frequency bands belong to described second access device and provide the frequency range of service, comprise unauthorized Frequency range；A described RSSI, for described first access device according to a described RSSI and described the The ratio of three RSSI determines whether described terminal device is accessed described target frequency bands, described 3rd RSSI The RSSI that described target frequency bands obtains is measured for described second access device；

Described second access device accepts described terminal device and accesses described target frequency bands.

In an optional implementation, described according to a described RSSI and described 3rd RSSI's Ratio determines whether to include the described target frequency bands of described terminal device access:

According to the ratio of a described RSSI Yu described 3rd RSSI, and described 2nd RSSI determines and is No by the described terminal device described target frequency bands of access, described 2nd RSSI is that institute measured by described terminal device State the RSSI that target frequency bands obtains.

If described 2nd RSSI is less than first threshold, and the ratio of a described RSSI and described 3rd RSSI Value, less than predetermined threshold, determines that switched to by described terminal device under described target frequency bands described second connects Enter equipment.

In an optional implementation, described second access device sends to described first access device First signal strength signal intensity instruction RSSI of target frequency bands includes:

Described second access device sends described second access device to described first access device and is currently at Closed mode or the information of opening, if described second access device is currently at closed mode, then A described RSSI is 0.

In an optional implementation, described method also includes:

When described second access device sends the transmission cut-off of described target frequency bands to described first access device Between；Described jump to described target frequency bands and communicate with described terminal device and include:

Described second access device jumps to described target frequency bands and described terminal after described deadline Equipment communicates.

Three aspects embodiments provide a kind of connection control method, including:

Terminal device receives the target frequency bands that the first access device sends, and described target frequency bands belongs to second and connects Enter equipment and the frequency range of service is provided, comprise unauthorized frequency range；

Described terminal device measures acquisition secondary signal intensity instruction RSSI to described target frequency bands, to Described first access device sends described 2nd RSSI；Described 2nd RSSI, accesses for described first and sets For determining whether to connect described terminal device according to described 2nd RSSI, a RSSI and the 3rd RSSI Entering described target frequency bands, described 3rd RSSI is that the described second described target frequency bands of access device measurement obtains RSSI, a described RSSI be the RSSI of target frequency bands obtained from described second access device；

Described terminal device indicates according to the switching of described first access device and switches under described target frequency bands Described second access device.

In an optional implementation, described according to described 2nd RSSI, a RSSI and Three RSSI determine whether the terminal device in described first access device coverage is switched to described second Access device includes:

In an optional implementation, described according to a described RSSI, described 2nd RSSI with And described 3rd RSSI determines whether to include the described target frequency bands of described terminal device access:

If described 2nd RSSI is less than first threshold, the ratio of a described RSSI and described 3rd RSSI More than Second Threshold and less than or equal to 1, jump to described target frequency bands and communicate with described terminal device.

Four aspects embodiments provide a kind of access device, use as the first access device, bag Include:

Connection establishment unit, for setting up communication connection with the second access device；

RSSI acquiring unit, for obtain first signal strength signal intensity instruction RSSI, a described RSSI be from The RSSI of the target frequency bands that described second access device obtains, described target frequency bands belongs to described second and accesses Equipment provides the frequency range of service, comprises unauthorized frequency range；

Rssi measurement unit, measures acquisition for described first access device to described target frequency bands Three RSSI；

Switch control unit, for determining according to the ratio of a described RSSI and described 3rd RSSI be No by the described terminal device described target frequency bands of access.

In an optional implementation, described access device also includes:

Frequency range transmitting element, sends institute for the terminal device in described first access device coverage State target frequency bands；

RSSI receives unit, is that described terminal device returns for receiving the 2nd RSSI, described 2nd RSSI The RSSI of the described target frequency bands returned；

Described switch control unit, for the ratio according to a described RSSI Yu described 3rd RSSI, And described 2nd RSSI determines whether described terminal device is accessed described target frequency bands.

In an optional implementation, described switch control unit, if little for described 2nd RSSI In first threshold, and the ratio of a described RSSI and described 3rd RSSI is less than predetermined threshold, by institute State described second access device that terminal device switches under described target frequency bands.

In an optional implementation, described switch control unit, if connecing specifically for described second Entering equipment current time slots is opening, is determining that handover delay is less than described target frequency bands respective channels and exists Described opening remaining time after, described terminal device is switched to the institute under described target frequency bands State the second access device；

In an optional implementation, described switch control unit, it is additionally operable to setting described terminal Before switching to described second access device under described target frequency bands, determine described first access device Load is higher than load threshold, or, determine that the service priority of described second access device meets switching and adjusts Degree requirement, or, determine that described second access device is interfered and meets dispatching requirement.

In an optional implementation, described RSSI acquiring unit, specifically for obtaining described second Access device is currently at the information of closed mode or opening, if described second access device is current It is closed, it is determined that a described RSSI is 0.

In an optional implementation, described switch control unit, if specifically for described 2nd RSSI Less than first threshold, the ratio of a described RSSI and described 3rd RSSI is more than Second Threshold and is less than Or equal to 1, jump to described target frequency bands and communicate with described terminal device.

In an optional implementation, described access device also includes:

Time acquisition unit, for jumping to described target frequency bands and described end at described switch control unit Before end equipment communicates, obtain described second access device when the transmission of described target frequency bands ends Between；

Described switch control unit, specifically for described transmission deadline after, jump to described mesh Mark frequency range communicates with described terminal device.

Five aspects embodiments provide a kind of access device, use as the second access device, bag Include:

Connection establishment unit, for setting up communication connection with the first access device；

RSSI transmitting element, for sending the first signal strength signal intensity of target frequency bands to described first access device Instruction RSSI, described target frequency bands belongs to described second access device provides the frequency range of service, comprises non-awarding Power frequency range；A described RSSI, for described first access device according to a described RSSI with described The ratio of the 3rd RSSI determines whether described terminal device is accessed described target frequency bands, described 3rd RSSI The RSSI that described target frequency bands obtains is measured for described second access device；

Access accepts unit, is used for accepting described terminal device and accesses described target frequency bands.

In an optional implementation, described RSSI transmitting element, specifically accesses with to described first Equipment sends described second access device and is currently at the information of closed mode or opening, if described Second access device is currently at closed mode, and the most described RSSI is 0.

In an optional implementation, described access device also includes:

Time transmitting element, for sending the transmission cut-off of described target frequency bands to described first access device Time；

Described access accepts unit, for jumping to described target frequency bands and institute after described deadline State terminal device to communicate.

Six aspects embodiments provide a kind of terminal device, including:

UHF band reception unit, for receiving the target frequency bands that the first access device sends, described target frequency bands Belong to the second access device and the frequency range of service is provided, comprise unauthorized frequency range；

Rssi measurement unit, for measuring acquisition secondary signal intensity instruction to described target frequency bands RSSI；

RSSI transmitting element, for sending described 2nd RSSI to described first access device；Described second RSSI, for described first access device according to described 2nd RSSI, a RSSI and the 3rd RSSI Determining whether described terminal device is accessed described target frequency bands, described 3rd RSSI is described second access The RSSI that target frequency bands described in device measuring obtains, a described RSSI are from described second access device The RSSI of the target frequency bands obtained；

Switch control unit, switches to described target for indicating according to the switching of described first access device Described second access device under frequency range.

In an optional implementation, carry out with described terminal device jumping to described target frequency bands Before communication, described first access device obtains the transmission in described target frequency bands of described second access device Deadline；

Described jump to described target frequency bands and communicate with described terminal device and include: cut in described transmission Only after the time, jump to described target frequency bands and communicate with described terminal device.

As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that to access first and sets Standby side, it is thus achieved that the RSSI that the RSSI of the second access device feedback and access device self are measured, May determine that accordingly and whether terminal device can be switched to target frequency bands, in the case of can switching Terminal device is switched to unauthorized frequency range, the equipment of unauthorized frequency range will not be interfered.

Accompanying drawing explanation

For the technical scheme being illustrated more clearly that in the embodiment of the present invention, in embodiment being described below The required accompanying drawing used is briefly introduced, it should be apparent that, the accompanying drawing in describing below is only this Some bright embodiments, from the point of view of those of ordinary skill in the art, are not paying creative work On the premise of, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.

Fig. 1 is embodiment of the present invention method flow schematic diagram；

Fig. 2 is the structural representation of the target frequency bands that the embodiment of the present invention accesses；

Fig. 3 is embodiment of the present invention access device structural representation；

Fig. 4 is embodiment of the present invention access device structural representation；

Fig. 5 is embodiment of the present invention access device structural representation；

Fig. 6 is embodiment of the present invention access device structural representation；

Fig. 7 is embodiment of the present invention access device structural representation；

Fig. 8 is embodiment of the present invention terminal device structural representation；

Fig. 9 is embodiment of the present invention access device structural representation；

Figure 10 is embodiment of the present invention terminal device structural representation；

Figure 11 is embodiment of the present invention terminal device structural representation；

Figure 12 is embodiment of the present invention access device structural representation.

Detailed description of the invention

In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to this Invention is described in further detail, it is clear that described embodiment is only that some of the present invention is implemented Example rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art exist Do not make all other embodiments obtained under creative work premise, broadly fall into present invention protection Scope.

Owing to, in LTE, as long as there being business to can be carried out transmission, there is no any monitoring rule；The most non- The WiFi equipment authorizing frequency range just cannot be transmitted when LTE has business to transmit, and can only wait until LTE business It is transmitted, channel clear just can be detected, just can be transmitted.LTE directly uses WiFi institute WiFi can be caused interference greatly in frequency range.So LTE is when using unauthorized frequency range, therefore, to assure that LAA can coexist with the access technology (such as WiFi) of unauthorized frequency range on the basis of fair close friend. And at present LTE system does not has the mechanism of listem-before-talk (Listen Before Talk, LBT) to avoid touching Hit.In order to preferably coexist the resource of frequency range with unauthorized frequency range, the embodiment of the present invention is that LTE devises one Set LBT mechanism.So, LTE if be detected that channel busy, then can not take this in unlicensed spectrum Frequency range, if be detected that channel is not busy, just takies.

Based on described above, embodiments providing a kind of connection control method, the present embodiment is at end The access device side that end equipment is currently accessed realizes, as it is shown in figure 1, include:

101: the first access devices and the second access device set up communication connection；

First access device and the second access device can be the access devices belonging to an operator, also It can be the access device of different operators；Can use in 3GPP between access device and be related to access and set Communication interface between Bei communicates.

102: above-mentioned first access device obtains the first signal strength signal intensity instruction RSSI, an above-mentioned RSSI and is From the RSSI of the target frequency bands that above-mentioned second access device obtains, above-mentioned target frequency bands belongs to above-mentioned second and connects Enter equipment and the frequency range of service is provided, comprise unauthorized frequency range；

Above-mentioned target frequency bands can be any frequency range that the second access device is supported, the present embodiment is paid close attention to Unauthorized frequency range.

Further, before determining whether described terminal device is accessed described target frequency bands, described side Method also includes:

103: described first access device terminal device in described first access device coverage sends Described target frequency bands, receiving the 2nd RSSI, described 2nd RSSI is the described of described terminal device return The RSSI of target frequency bands；

In subsequent embodiment, step 105 specifically may is that

The concrete transmission mode that above-mentioned first access device sends target frequency bands to terminal device can be broadcast, Can also be that the information having directive property sends, the embodiment of the present invention not be made uniqueness and is limited.

It should be noted that this step 103 can be used in decision-making by the 2nd RSSI of terminal feedback it is No use target frequency bands accesses more accurate；Reduce because of the brought decision accuracy of the difference of different terminal equipment Low problem.This dotted portion shown in 103 should not be construed as the content that have to perform as optional step.

104: above-mentioned first access device measures acquisition the 3rd RSSI to above-mentioned target frequency bands；

The concrete mode that target frequency bands is measured by above-mentioned first access device is referred to communication equipment and enters The implementation of row signal measurement, repeats no more in the present embodiment.

105: determine whether to set described terminal according to the ratio of a described RSSI and described 3rd RSSI The described target frequency bands of standby access.

In FIG, dotted portion shown in 106 is for the first access device side, if perform to depend on In the decision-making whether switched in 105.Therefore it is not absolutely required to perform.

The span of the ratio of a described RSSI and described 3rd RSSI, between 0～1, levels off to 0 represents that second access device side this target frequency bands interference is less, can be linked into this mesh of the second access device Mark frequency range；If leveling off to 1, represent less in first access device side this target frequency bands interference, permissible This target frequency bands is used to communicate at the first access device.The most exemplary, for example can arrange Certain threshold value, when less than or equal to this threshold value, represents that second this target frequency bands of access device side is disturbed relatively Few, when more than this threshold value, represent that the interference of this target frequency bands is bigger.

It should be noted that according to the ratio of a described RSSI and described 3rd RSSI described in the most in the whole text Value determines whether described terminal device is accessed described target frequency bands, can be with described by a RSSI The ratio of the 3rd RSSI is as determining whether to access described terminal device one judgement of described target frequency bands Factor rather than all factor, alternatively, it is also possible to by the ratio of a RSSI Yu described 3rd RSSI Combine with other factors and judge whether described terminal device is accessed described target frequency bands.

The present embodiment, in the first access device side, it is thus achieved that second access device feedback RSSI and The RSSI that access device self is measured, may determine that accordingly and whether terminal device can be switched to target Frequency range, is switched to unauthorized frequency range in the case of can switching by terminal device, will not be to unauthorized frequency The equipment of section interferes.

Alternatively, owing to the first access device has been obtained for the RSSI of the second access device feedback and connects Enter the RSSI that equipment self is measured, can determine therefrom that whether target frequency bands current time slots is used, and The information such as the degree being disturbed, and it is made whether the decision-making to target frequency bands of the switching terminal equipment accordingly, tool Body is as follows: the above-mentioned ratio according to a described RSSI Yu described 3rd RSSI, and described 2nd RSSI Determine whether to include the described target frequency bands of described terminal device access:

If above-mentioned 2nd RSSI is less than first threshold, and the ratio of an above-mentioned RSSI and above-mentioned 3rd RSSI Value sets less than predetermined threshold, above-mentioned second access switched to by above-mentioned terminal device under above-mentioned target frequency bands Standby.

Alternatively, there is based on the second access device the application scenarios of opening and closed mode, this Bright embodiment specifically can be such that above-mentioned above-mentioned terminal device is switched under above-mentioned target frequency bands above-mentioned Second access device includes:

If above-mentioned second access device current time slots is opening, determining that handover delay is less than above-mentioned mesh Mark frequency range respective channels above-mentioned opening remaining time after, above-mentioned terminal device is switched to State above-mentioned second access device under target frequency bands；

Or, if above-mentioned second access device current time slots is closed mode, activates above-mentioned second access and set For making above-mentioned second access device be in opening in current time slots, above-mentioned determining that handover delay is less than Target frequency bands respective channels above-mentioned opening remaining time after, above-mentioned terminal device is switched to Above-mentioned second access device under above-mentioned target frequency bands.

Further, even if owing to target frequency bands can use, also it is not absolutely required to cut terminal device Change to this target frequency bands, it is therefore desirable to quote the scheme of load balancing or quality control, specific as follows: Before above-mentioned terminal device is switched to above-mentioned second access device under above-mentioned target frequency bands, above-mentioned side Method also includes:

Determine that above-mentioned first access device load is higher than load threshold, or, determine that above-mentioned second access sets Standby service priority meets switching scheduling requirement, or, determine that above-mentioned second access device is interfered And meet dispatching requirement.

Alternatively, there is based on the second access device the function of opening and closed mode, therefore this Bright embodiment obtains in the first signal strength signal intensity instruction, if the second access device is currently that closed mode is permissible Directly regarding as a RSSI is 0, and therefore the present embodiment specifically can be such that above-mentioned first access device Obtain the first signal strength signal intensity instruction RSSI to include:

Above-mentioned first access device obtains above-mentioned second access device and is currently at closed mode or opens shape The information of state, if above-mentioned second access device is currently at closed mode, it is determined that an above-mentioned RSSI is 0。

Alternatively, the ratio of the most above-mentioned RSSI and above-mentioned 3rd RSSI is less than pre- Determining threshold value, more specifically ratio levels off to 0；May determine that the second access device in target frequency bands is in Off state or the most do not taken or disturb less by other radio reception device；In the present embodiment, as Really to level off to 1 embodiment of the present invention specific as follows for this ratio: above-mentioned according to a described RSSI and described the The ratio of three RSSI, and described 2nd RSSI determine whether by described terminal device access described target Frequency range includes:

If above-mentioned 2nd RSSI is less than first threshold, the ratio of an above-mentioned RSSI and above-mentioned 3rd RSSI More than Second Threshold and less than or equal to 1, above-mentioned first access device jumps to above-mentioned target frequency bands with above-mentioned Terminal device communicates.

In the present embodiment, an above-mentioned RSSI and the ratio of above-mentioned 3rd RSSI are more than Second Threshold and little In or equal to 1, refer to that this ratio levels off to 1；May determine that and only exist in target frequency bands under same operator Other access device, or other access device including different access equipment of operators and Wi-Fi is little, Or other access device interference to being operated in this frequency range is the least.

Further, the access device under same operator is likely had to provide clothes due to this target frequency bands Business, therefore for a longer time slot, the embodiment of the present invention specifically can be such that jump to above-mentioned Before target frequency bands and above-mentioned terminal device communicate, said method also includes:

Obtain above-mentioned second access device transmission deadline in above-mentioned target frequency bands；Above-mentioned jump to State target frequency bands to communicate with above-mentioned terminal device and include:

After above-mentioned transmission deadline, jump to above-mentioned target frequency bands and lead to above-mentioned terminal device Letter.

Explanation based on previous embodiment, the embodiment of the present invention additionally provides another kind of connection control method, The present embodiment is applied to the second access device side, it may be assumed that the target access device side of terminal device switching, Referring still to shown in Fig. 1, including:

101: the second access devices and the first access device set up communication connection；

102: the first signal that above-mentioned second access device sends target frequency bands to above-mentioned first access device is strong Degree instruction RSSI, above-mentioned target frequency bands belongs to above-mentioned second access device provides the frequency range of service, comprises non- Authorize frequency range；An above-mentioned RSSI, for above-mentioned first access device according to a described RSSI and institute State the ratio of the 3rd RSSI and determine whether to access described terminal device described target frequency bands, the described 3rd RSSI is that described second access device measures the RSSI that described target frequency bands obtains；

106: above-mentioned second access device accepts above-mentioned terminal device and accesses above-mentioned target frequency bands.

Further, the described ratio according to a described RSSI Yu described 3rd RSSI determine whether by Described terminal device accesses described target frequency bands and includes:

If above-mentioned 2nd RSSI is less than first threshold, and the ratio of an above-mentioned RSSI and above-mentioned 3rd RSSI Value, less than predetermined threshold, determines that switched to by above-mentioned terminal device under above-mentioned target frequency bands above-mentioned second connects Enter equipment.

Alternatively, there is based on the second access device the function of opening and closed mode, therefore this Bright embodiment obtains in the first signal strength signal intensity instruction, if the second access device is currently that closed mode is permissible Directly regarding as a RSSI is 0, and therefore the present embodiment specifically can be such that above-mentioned second access device The the first signal strength signal intensity instruction RSSI sending target frequency bands to above-mentioned first access device includes:

Above-mentioned second access device sends above-mentioned second access device to above-mentioned first access device and is currently at Closed mode or the information of opening, if above-mentioned second access device is currently at closed mode, then An above-mentioned RSSI is 0.

If above-mentioned 2nd RSSI is less than first threshold, the ratio of an above-mentioned RSSI and above-mentioned 3rd RSSI More than Second Threshold and less than or equal to 1, jump to above-mentioned target frequency bands and communicate with above-mentioned terminal device.

Further, the access device under same operator is likely had to provide clothes due to this target frequency bands Business, therefore for a longer time slot, the embodiment of the present invention specifically can be such that said method also wraps Include:

When above-mentioned second access device sends the transmission cut-off of above-mentioned target frequency bands to above-mentioned first access device Between；Above-mentioned jump to above-mentioned target frequency bands and communicate with above-mentioned terminal device and include:

Above-mentioned second access device jumps to above-mentioned target frequency bands and above-mentioned terminal after above-mentioned deadline Equipment communicates.

Explanation based on previous embodiment, the embodiment of the present invention additionally provides another kind of connection control method, The present embodiment is applied to terminal equipment side, referring still to shown in Fig. 1, including:

103: terminal device receives the target frequency bands that the first access device sends, above-mentioned target frequency bands belongs to the Two access devices provide the frequency range of service, comprise unauthorized frequency range；

Above-mentioned terminal device measures acquisition secondary signal intensity instruction RSSI to above-mentioned target frequency bands, to Above-mentioned first access device sends above-mentioned 2nd RSSI；Above-mentioned 2nd RSSI, accesses for above-mentioned first and sets For determining whether to connect above-mentioned terminal device according to above-mentioned 2nd RSSI, a RSSI and the 3rd RSSI Entering above-mentioned target frequency bands, above-mentioned 3rd RSSI is that the above-mentioned second above-mentioned target frequency bands of access device measurement obtains RSSI, an above-mentioned RSSI be the RSSI of target frequency bands obtained from above-mentioned second access device；

106: above-mentioned terminal device indicates according to the switching of above-mentioned first access device and switches to above-mentioned target frequency Above-mentioned second access device under Duan.

Alternatively, owing to the first access device has been obtained for the RSSI of the second access device feedback and connects Enter the RSSI that equipment self is measured, can determine therefrom that whether target frequency bands current time slots is used, and The information such as the degree being disturbed, and it is made whether the decision-making to target frequency bands of the switching terminal equipment accordingly, tool Body is as follows: above-mentioned determine whether above-mentioned according to above-mentioned 2nd RSSI, a RSSI and the 3rd RSSI Terminal device in first access device coverage switches to above-mentioned second access device and includes:

Alternatively, the ratio of the most above-mentioned RSSI and above-mentioned 3rd RSSI is less than pre- Determining threshold value, more specifically ratio levels off to 0；May determine that the second access device in target frequency bands is in Off state or the most do not taken or disturb less by other radio reception device；In the present embodiment, as Really to level off to 1 embodiment of the present invention specific as follows for this ratio: above-mentioned according to an above-mentioned RSSI, above-mentioned Two RSSI and above-mentioned 3rd RSSI determine whether to include the above-mentioned target frequency bands of above-mentioned terminal device access:

It should be noted that present specification is by first before introducing the concrete example of the embodiment of the present invention Access device and the second access device, correspond to serving BS and target BS, serving BS and mesh respectively Mark base station all can be operated in target frequency bands, owing to the frequency range used in China's Telecommunication's technology is according to operation Business is divided, and the different frequency ranges between operator is different；Therefore in subsequent embodiment, Illustrate with the base station (i.e. serving BS and target BS belongs to same operator) of same operator Explanation.If it should be noted that all operators all can use the frequency between full frequency band, or operator There is overlapping situation in section, the embodiment of the present invention then can be not limited in the application scenarios of same operator.

It addition, for service network base station, target BS is not well-determined initially, therefore Target BS can have a lot；During follow-up access decision-making, as long as meeting the base station of condition Using the base station accessed the most at last as terminal device.

In the embodiment of the present invention, terminal device by performing RSSI detection except obtaining target to target frequency bands The load of frequency range and interference level, in order to solve in LAA outside the problem such as concealed nodes and Channel assignment, also may be used With the free time by obtaining target frequency bands information, even frequency range further with the target BS under operator State.Reach reduce the LTE base station frequency-selecting time and improve the purpose of part terminal throughput with this.

Individually below with regard to two kinds of application scenarios, the embodiment of the present invention is illustrated, specific as follows:

One, ratio w=0 or level off to 0 situation.

Step one: have reception signal strength signal intensity instruction (Received Signal Strength Indication, RSSI) terminal device of detection function is by receiving after the detection instruction of serving BS, periodically Target frequency bands is carried out RSSI energy measuring.

Step 2: within a cycle, serving BS with pass through X2 interface with the target BS under operator Carrying out Signalling exchange, serving BS obtains with the band information residing for the target BS under operator, and raw Become list 1.This list 1 can include the frequency point information of target frequency bands, bandwidth, frequency range occupied information and The duty of these target BS and loading condition.Wherein, these target BS may there be some mesh Mark base station belongs to micro-base station with on/off function.For being respectively at the target of on or off state Base station, can be distinguished by different marks, and this mark can be a bit information.

If the target BS under target frequency bands is in off state, then set this target BS within this cycle Load is 0, and correspondingly RSSI is also 0.

Step 3: serving BS informs the information of the above-mentioned list of terminal device 1 by the forms of broadcasting.If The space that the information of this list 1 takies is bigger, serving BS the information of this list 1 can be deposited to System information block (System Information Block, SIB) passes through Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH) inform terminal device, terminal device can also pass through in addition Set up wireless heterogeneous networks (Radio Resource Control, RRC) connection with serving BS and obtain this The information of list 1.

Step 4: the terminal device of the information receiving this list 1 can periodically skip to target frequency bands, This target frequency bands is carried out RSSI energy measuring.

Step 5: serving BS and the target BS in this target frequency bands, by X2 interface Signalling exchange, obtain Take the information such as the position of this target BS, transmit power, and the target BS calculated in target frequency bands arrives The received signal strength of serving BS.

Step 6: serving BS is also carried out RSSI detection to target frequency bands.If what serving BS received comes In target frequency bands, the received signal strength of target BS is P, if the target BS in target frequency bands is in Off state, if P is 0.If the intensity carrying out RSSI energy measuring in target frequency bands is by serving BS P1, if w is serving BS receive from the signal strength signal intensity of target BS under same operator and RSSI The ratio of energy measuring intensity, i.e.Wherein, N represents in target frequency bands with operation The number of target BS under business.

Step 7: the RSSI value detected target frequency bands at terminal device is less than presetting threshold value premise Under, for the value of w, if w=0, or tend to 0, represent that the base station in target frequency bands is in off shape State or the most do not taken or disturb less by other radio reception device.

Judgement based on step 7, for the target BS of on and off, has a following processing scheme:

(1), for the target BS being on state:

First serving BS adds up the number (i.e. load) and respectively of terminal device in target BS coverage The service priority of individual terminal device, or know and be disturbed bigger terminal device.When confirming this service When loading bigger under base station, or when being more than presetting load-threshold value, determine and need switching.

Base station is in the base station Signalling exchange of on state by X2 interface and target frequency bands, obtains this base station Loading condition.This step may determine that whether target BS can access with receiving terminal equipment.

If the handover delay of certain terminal device is T, the handover delay in general user face is about 50ms, controls The handover delay in face is about 30ms.Target BS takies channel remaining time is T1, it is assumed that T1≤32ms.

If the load of this base station is less than certain threshold value, or the base station that load is minimum, and T≤T1, I.e. switching time, serving BS then determines can be by priority less than or equal to the residue transmission time of this base station High or be disturbed bigger terminal device and switch to the target BS under target frequency bands.Otherwise, do not switch.

(2), for the base station being in off state:

It is in the target BS of off state in base station activation target frequency bands, makes to be in the target base of off state Station becomes on state.

If the handover delay of certain terminal device is T, the handover delay in general user face is about 50ms, controls The handover delay in face is about 30ms.Target BS by being the switching time of off on T1, semi-static is opened Closing in algorithm, the value of T1 is between 20ms～100ms.

If T's >=T1, i.e. switching time more than or equal to the state switching time of target BS, then services Base station can be by high for priority or be disturbed the target base that bigger terminal device switches under target frequency bands Stand.Otherwise, do not switch.

Two, ratio w=1 or approximate 1 situation.

Step one: the terminal device with RSSI detection function refers to by receiving the detection from serving BS After order, periodically target frequency bands is carried out RSSI energy measuring.

Step 2: within a cycle, serving BS is entered by X2 interface with target BS under same operator Row Signalling exchange, obtains and exists with the band information residing for target BS under operator, and generate list 1. This list 1 includes the frequency point information of target frequency bands, bandwidth, frequency range occupied information and these target BS Duty and loading condition.Wherein, these target BS include having all kinds of of on/off function Micro-base station.For being respectively at the target BS of on or off state, give district by different marks Point, this mark can be a bit information.If the target BS under target frequency bands is in off state, Then set this target BS load in this long period as 0.

Step 3: serving BS informs the information of terminal device list 1 by the forms of broadcasting.If these row The space that the information of table 1 takies is bigger, and the information of this list 1 can be deposited to SIB by serving BS Informing terminal device by PDSCH, terminal device can also be by setting up RRC with serving BS in addition Connect and obtain.

Step 4: the terminal device of the information receiving this list 1 periodically skips to target frequency bands, to this Target frequency bands carries out RSSI energy measuring.

Step 6: serving BS is also carried out RSSI detection to target frequency bands.If what serving BS received comes The received signal strength of the target BS in target frequency bands is P, if at the target BS in target frequency bands In off state, if P is 0.If serving BS is to carrying out RSSI energy measuring intensity in target frequency bands For P1, if w is serving BS receive from the signal strength signal intensity of target BS under same operator and RSSI The ratio of energy measuring intensity, i.e.Wherein, N represents same operator in target frequency bands The number of lower target BS.

Step 7: the RSSI value detected target frequency bands at terminal device is less than presetting threshold value premise Under, for the value of w, if the value of w tends to 1, then it represents that within this cycle, target frequency bands is only deposited Target BS under same operator, or other access including different operator base station and Wi-Fi sets Standby little, or other access device interference to being operated in this target frequency bands is the least.

May determine that then target frequency bands can be able to perform to walk as follows with access terminal equipment based on step 7 Rapid: serving BS is obtained by X2 interface and is operated in target frequency bands with target BS business under operator Transmit deadline.When serving BS has business demand, by same operator in the target frequency bands of acquisition The transmission deadline of lower target BS business, pay the utmost attention to take this target frequency bands.

Schematic diagram as shown in Figure 2, horizontal rectangle is illustrated as in time, and target frequency bands accounts in time domain By the situation of channel, wherein second and the 4th time are the business deadlines of base station 1 and base station 2, The most after this, this target frequency bands does not has business to transmit；So can access this target frequency bands.

Access device in LAA and terminal device are performed in rssi measurement and heterogeneous network by the embodiment of the present invention The on/off algorithm of access device combine, on the basis of the rssi measurement in LAA newly-increased with fortune Target BS under battalion business combines the method obtaining target frequency bands information further.Further facilitate channel choosing Selecting the switching with terminal device, the QoS improving throughput of system and user ensures.

Meanwhile, serving BS by the arrival time of business and target frequency bands with target BS under operator Business combines deadline, pays the utmost attention to this target frequency bands, and LTE base station can be allowed to exempt to award not violating In the case of power frequency range regulation, take available resources the soonest, decrease the LTE base station frequency-selecting time.

Additionally, by high for service priority or be disturbed bigger terminal device and switch in target frequency bands full Under the base station of foot time conditions, improve handling capacity and the service quality of this terminal device.

The embodiment of the present invention additionally provides a kind of access device, uses as the first access device, such as Fig. 3 Shown in, including:

Connection establishment unit 301, for setting up communication connection with the second access device；

RSSI acquiring unit 302, for obtaining the first signal strength signal intensity instruction RSSI, an above-mentioned RSSI The RSSI of the target frequency bands for obtaining from above-mentioned second access device, above-mentioned target frequency bands belongs to above-mentioned second Access device provides the frequency range of service, comprises unauthorized frequency range；

Rssi measurement unit 303, for measuring acquisition the 3rd RSSI to above-mentioned target frequency bands；

Switch control unit 304, for true with the ratio of described 3rd RSSI according to a described RSSI Fixed whether by the described terminal device described target frequency bands of access.

Further, as shown in Figure 4, described access device also includes:

Frequency range transmitting element 401, sends for the terminal device in above-mentioned first access device coverage Above-mentioned target frequency bands；

RSSI receives unit 402, is that above-mentioned terminal sets for receiving the 2nd RSSI, above-mentioned 2nd RSSI The RSSI of the standby above-mentioned target frequency bands returned；

Described switch control unit 304, for the ratio according to a described RSSI and described 3rd RSSI It is worth, and described 2nd RSSI determines whether described terminal device is accessed described target frequency bands.

Alternatively, owing to the first access device has been obtained for the RSSI of the second access device feedback and connects Enter the RSSI that equipment self is measured, can determine therefrom that whether target frequency bands current time slots is used, and The information such as the degree being disturbed, and it is made whether the decision-making to target frequency bands of the switching terminal equipment accordingly, tool Body is as follows: above-mentioned switch control unit 304, if for above-mentioned 2nd RSSI less than first threshold, and on The ratio stating a RSSI and above-mentioned 3rd RSSI is less than predetermined threshold, is switched to by above-mentioned terminal device Above-mentioned second access device under above-mentioned target frequency bands.

Alternatively, there is based on the second access device the application scenarios of opening and closed mode, this Bright embodiment specifically can be such that above-mentioned switch control unit 304, sets if accessing specifically for above-mentioned second Standby current time slots is opening, determine handover delay be less than above-mentioned target frequency bands respective channels upper After the remaining time stating opening, above-mentioned terminal device is switched to above-mentioned under above-mentioned target frequency bands Two access devices；

Further, even if owing to target frequency bands can use, also it is not absolutely required to cut terminal device Change to this target frequency bands, it is therefore desirable to quote the scheme of load balancing or quality control, specific as follows: Above-mentioned switch control unit 304, is additionally operable to upper switched to by above-mentioned terminal device under above-mentioned target frequency bands Before stating the second access device, determine that above-mentioned first access device load is higher than load threshold, or, really The service priority of fixed above-mentioned second access device meets switching scheduling requirement, or, determine above-mentioned second Access device is interfered and meets dispatching requirement.

Alternatively, there is based on the second access device the function of opening and closed mode, therefore this Bright embodiment obtains in the first signal strength signal intensity instruction, if the second access device is currently that closed mode is permissible Directly regarding as a RSSI is 0, and therefore the present embodiment specifically can be such that above-mentioned RSSI obtains list Unit 302, is currently at the letter of closed mode or opening specifically for obtaining above-mentioned second access device Breath, if above-mentioned second access device is currently at closed mode, it is determined that an above-mentioned RSSI is 0.

Alternatively, the ratio of the most above-mentioned RSSI and above-mentioned 3rd RSSI is less than pre- Determining threshold value, more specifically ratio levels off to 0；May determine that the second access device in target frequency bands is in Off state or the most do not taken or disturb less by other radio reception device；In the present embodiment, as Really to level off to 1 embodiment of the present invention specific as follows for this ratio: above-mentioned switch control unit 304, specifically for If above-mentioned 2nd RSSI is less than first threshold, the ratio of an above-mentioned RSSI and above-mentioned 3rd RSSI is more than Second Threshold and less than or equal to 1, jumps to above-mentioned target frequency bands and communicates with above-mentioned terminal device.

Further, the access device under same operator is likely had to provide clothes due to this target frequency bands Business, therefore for a longer time slot, the embodiment of the present invention specifically can be such that as it is shown in figure 5, Above-mentioned access device also includes:

Time acquisition unit 501, for above-mentioned switch control unit 304 jump to above-mentioned target frequency bands with Before above-mentioned terminal device communicates, obtain the transmission in above-mentioned target frequency bands of above-mentioned second access device Deadline；

Above-mentioned switch control unit 304, specifically for, after above-mentioned transmission deadline, jumping to above-mentioned Target frequency bands communicates with above-mentioned terminal device.

The embodiment of the present invention additionally provides another kind of access device, uses as the second access device, such as Fig. 6 Shown in, including:

Connection establishment unit 601, for setting up communication connection with the first access device；

RSSI transmitting element 602, for sending the first signal of target frequency bands to above-mentioned first access device Intensity instruction RSSI, above-mentioned target frequency bands belongs to above-mentioned second access device provides the frequency range of service, comprises Unauthorized frequency range；An above-mentioned RSSI, for above-mentioned first access device according to a described RSSI with The ratio of described 3rd RSSI determine whether by described terminal device access described target frequency bands, the described 3rd RSSI is that described second access device measures the RSSI that described target frequency bands obtains；

Access accepts unit 603, is used for accepting above-mentioned terminal device and accesses above-mentioned target frequency bands.

Alternatively, the described ratio according to a described RSSI Yu described 3rd RSSI determines whether institute State the described target frequency bands of terminal device access to include:

Alternatively, there is based on the second access device the function of opening and closed mode, therefore this Bright embodiment obtains in the first signal strength signal intensity instruction, if the second access device is currently that closed mode is permissible Directly regarding as a RSSI is 0, and therefore the present embodiment specifically can be such that above-mentioned RSSI sends list Unit 602, is specifically currently at closed mode with to above-mentioned first access device above-mentioned second access device of transmission Or the information of opening, if above-mentioned second access device is currently at closed mode, the most above-mentioned first RSSI is 0.

Further, the access device under same operator is likely had to provide clothes due to this target frequency bands Business, therefore for a longer time slot, the embodiment of the present invention specifically can be such that as it is shown in fig. 7, Above-mentioned access device also includes:

Time transmitting element 701, cuts for the transmission sending above-mentioned target frequency bands to above-mentioned first access device The only time；

Above-mentioned access accepts unit 603, for jump to after above-mentioned deadline above-mentioned target frequency bands with Above-mentioned terminal device communicates.

The embodiment of the present invention additionally provides a kind of terminal device, as shown in Figure 8, and including:

UHF band reception unit 801, for receiving the target frequency bands that the first access device sends, above-mentioned target frequency Section belongs to the second access device provides the frequency range of service, comprises unauthorized frequency range；

Rssi measurement unit 802, refers to for above-mentioned target frequency bands measures acquisition secondary signal intensity Show RSSI；

RSSI transmitting element 803, for sending above-mentioned 2nd RSSI to above-mentioned first access device；Above-mentioned 2nd RSSI, for above-mentioned first access device according to above-mentioned 2nd RSSI, a RSSI and the 3rd RSSI determines whether above-mentioned terminal device is accessed above-mentioned target frequency bands, and above-mentioned 3rd RSSI is above-mentioned the Two access devices measure the RSSI that above-mentioned target frequency bands obtains, and an above-mentioned RSSI is for connect from above-mentioned second Enter the RSSI of the target frequency bands that equipment obtains；

Switch control unit 804, switches to above-mentioned mesh for indicating according to the switching of above-mentioned first access device Above-mentioned second access device under mark frequency range.

Further, the access device under same operator is likely had to provide clothes due to this target frequency bands Business, therefore for a longer time slot, the embodiment of the present invention specifically can be such that jump to above-mentioned Before target frequency bands and above-mentioned terminal device communicate, above-mentioned first access device obtains above-mentioned second and connects Enter equipment transmission deadline in above-mentioned target frequency bands；Above-mentioned jump to above-mentioned target frequency bands and above-mentioned end End equipment communicates and includes:

The embodiment of the present invention additionally provides another kind of access device, as it is shown in figure 9, include: receiver 901, Transmitter 902, processor 903 and memory 904；Wherein, memory 904 may be used for processor 903 perform the cache resources needed for data process, or the memory space as other data；

If structure based on this access device, use as the first access device, then processor 903, use In controlling execution: set up communication connection with the second access device；Obtain the first signal strength signal intensity instruction RSSI, An above-mentioned RSSI is the RSSI of the target frequency bands obtained from above-mentioned second access device, above-mentioned target frequency Section belongs to above-mentioned second access device provides the frequency range of service, comprises unauthorized frequency range；Connect to above-mentioned first Enter terminal device in equipment coverage and send above-mentioned target frequency bands, receive the 2nd RSSI, above-mentioned second RSSI is the RSSI of the above-mentioned target frequency bands that above-mentioned terminal device returns；Above-mentioned target frequency bands is measured Obtain the 3rd RSSI；Determine whether described according to the ratio of a described RSSI and described 3rd RSSI Terminal device accesses described target frequency bands.

Further, even if owing to target frequency bands can use, also it is not absolutely required to cut terminal device Change to this target frequency bands, it is therefore desirable to quote the scheme of load balancing or quality control, specific as follows: Above-mentioned processor 903, is used for controlling to perform: switched under above-mentioned target frequency bands by above-mentioned terminal device Before above-mentioned second access device, determine that above-mentioned first access device load is higher than load threshold, or, Determine that the service priority of above-mentioned second access device meets switching scheduling requirement, or, determine above-mentioned Two access devices are interfered and meet dispatching requirement.

Alternatively, there is based on the second access device the function of opening and closed mode, therefore this Bright embodiment obtains in the first signal strength signal intensity instruction, if the second access device is currently that closed mode is permissible Directly regarding as a RSSI is 0, and therefore the present embodiment specifically can be such that above-mentioned acquisition the first signal Intensity instruction RSSI includes:

Obtain above-mentioned second access device and be currently at the information of closed mode or opening, if above-mentioned Second access device is currently at closed mode, it is determined that an above-mentioned RSSI is 0.

Further, the access device under same operator is likely had to provide clothes due to this target frequency bands Business, therefore for a longer time slot, the embodiment of the present invention specifically can be such that jump to above-mentioned Before target frequency bands and above-mentioned terminal device communicate, above-mentioned processor 903, it is additionally operable to control to perform: Obtain above-mentioned second access device transmission deadline in above-mentioned target frequency bands；Above-mentioned jump to above-mentioned mesh Mark frequency range communicates with above-mentioned terminal device and includes:

If structure based on the access device shown in Fig. 9, it is applied to the second access device, then this process Device 903 is used for controlling to perform: set up communication connection with the first access device；To above-mentioned first access device Sending the first signal strength signal intensity instruction RSSI of target frequency bands, above-mentioned target frequency bands belongs to above-mentioned second access and sets The standby frequency range providing service, comprises unauthorized frequency range；An above-mentioned RSSI, accesses for above-mentioned first and sets For determining whether to access described terminal device according to the ratio of a described RSSI and described 3rd RSSI Described target frequency bands, above-mentioned 2nd RSSI is the RSSI that above-mentioned terminal device measures that above-mentioned target frequency bands obtains, Above-mentioned 3rd RSSI is that above-mentioned second access device measures the RSSI that above-mentioned target frequency bands obtains；In acceptance State terminal device and access above-mentioned target frequency bands.

Alternatively, there is based on the second access device the function of opening and closed mode, therefore this Bright embodiment obtains in the first signal strength signal intensity instruction, if the second access device is currently that closed mode is permissible Directly regarding as a RSSI is 0, and therefore the present embodiment specifically can be such that and above-mentioned connects to above-mentioned first The the first signal strength signal intensity instruction RSSI entering equipment transmission target frequency bands includes:

Further, the access device under same operator is likely had to provide clothes due to this target frequency bands Business, therefore for a longer time slot, the embodiment of the present invention specifically can be such that above-mentioned processor 903, It is additionally operable to control to perform: send the transmission deadline of above-mentioned target frequency bands to above-mentioned first access device；

The above-mentioned terminal device of above-mentioned acceptance accesses above-mentioned target frequency bands and includes:

After above-mentioned deadline, jump to above-mentioned target frequency bands communicate with above-mentioned terminal device.

The embodiment of the present invention additionally provides another kind of terminal device, as shown in Figure 10, and including: receiver 1001, Transmitter 1002, processor 1003 and memory 1004；Wherein, memory 1004 may be used for place Reason device 1003 performs the cache resources needed for data process, or the memory space as other data；

Wherein, processor 1003, it is used for controlling to perform: receive the target frequency bands that the first access device sends, Above-mentioned target frequency bands belongs to the second access device provides the frequency range of service, comprises unauthorized frequency range；To above-mentioned Target frequency bands measures acquisition secondary signal intensity instruction RSSI, sends to above-mentioned first access device State the 2nd RSSI；Above-mentioned 2nd RSSI, for above-mentioned first access device according to above-mentioned 2nd RSSI, Oneth RSSI and the 3rd RSSI determines whether above-mentioned terminal device is accessed above-mentioned target frequency bands, above-mentioned 3rd RSSI is that above-mentioned second access device measures the RSSI, an above-mentioned RSSI that above-mentioned target frequency bands obtains The RSSI of the target frequency bands for obtaining from above-mentioned second access device；According to cutting of above-mentioned first access device Change above-mentioned second access device that instruction switches under above-mentioned target frequency bands.

Further, the access device under same operator is likely had to provide clothes due to this target frequency bands Business, therefore for a longer time slot, the embodiment of the present invention specifically can be such that jump to above-mentioned Before target frequency bands and above-mentioned terminal device communicate, above-mentioned first access device obtains above-mentioned second and connects Enter equipment transmission deadline in above-mentioned target frequency bands；

Above-mentioned jump to above-mentioned target frequency bands and communicate with above-mentioned terminal device and include:

The embodiment of the present invention additionally provides another kind of terminal device, as shown in figure 11, for convenience of description, Illustrate only the part relevant to the embodiment of the present invention, concrete ins and outs do not disclose, refer to this Bright embodiment method part.This terminal device can be to include mobile phone, panel computer, PDA (Personal Digital Assistant, personal digital assistant), POS (Point of Sales, point-of-sale terminal), vehicle mounted electric The arbitrarily terminal device such as brain, as a example by terminal device is as mobile phone:

Figure 11 is illustrated that the part-structure of the mobile phone relevant to the terminal device of embodiment of the present invention offer Block diagram.With reference to Figure 11, mobile phone includes: radio frequency (Radio Frequency, RF) circuit 1110, storage Device 1120, input block 1130, display unit 1140, sensor 1150, voicefrequency circuit 1160, nothing Line fidelity (wireless fidelity, WiFi) module 1170, processor 1180 and power supply 1190 etc. Parts.It will be understood by those skilled in the art that the handset structure shown in Figure 11 is not intended that mobile phone Limit, can include that ratio illustrates more or less of parts, or combine some parts, or different Parts are arranged.

Below in conjunction with Figure 11 each component parts of mobile phone carried out concrete introduction:

RF circuit 1110 can be used for receiving and sending messages or in communication process, the reception of signal and transmission, especially, After the downlink information of base station is received, process to processor 1180；It addition, send out designing up data Give base station.Generally, RF circuit 1110 includes but not limited to antenna, at least one amplifier, transmitting-receiving letter Machine, coupler, low-noise amplifier (Low Noise Amplifier, LNA), duplexer etc..Additionally, RF circuit 1110 can also be communicated with network and other equipment by radio communication.Above-mentioned radio communication is permissible Use arbitrary communication standard or agreement, include but not limited to global system for mobile communications (Global System Of Mobile communication, GSM), general packet radio service (General Packet Radio Service, GPRS), CDMA (Code Division Multiple Access, CDMA), broadband CDMA (Wideband Code Division Multiple Access, WCDMA), Long Term Evolution (Long Term Evolution, LTE), Email, Short Message Service (Short Messaging Service, SMS) etc..

Memory 1120 can be used for storing software program and module, and processor 1180 is stored by operation In software program and the module of memory 1120, thus perform the application of various functions and the data of mobile phone Process.Memory 1120 can mainly include storing program area and storage data field, wherein, stores program area Application program (the such as sound-playing function, image needed for operating system, at least one function can be stored Playing function etc.) etc.；Storage data field can store data (the such as sound that the use according to mobile phone is created Frequency evidence, phone directory etc.) etc..Additionally, memory 1120 can include high-speed random access memory, Can also include nonvolatile memory, for example, at least one disk memory, flush memory device or its His volatile solid-state part.

Input block 1130 can be used for receiving numeral or the character information of input, and produces the use with mobile phone Family is arranged and function controls relevant key signals input.Specifically, input block 1130 can include touch-control Panel 1131 and other input equipments 1132.Contact panel 1131, also referred to as touch-screen, can collect use Family thereon or neighbouring touch operation (such as user use any applicable object such as finger, stylus or Annex operation on contact panel 1131 or near contact panel 1131), and according to set in advance Formula drives corresponding attachment means.Optionally, contact panel 1131 can include touch detecting apparatus and touch Touch two parts of controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect touch The signal that operation brings, transmits a signal to touch controller；Touch controller is from touch detecting apparatus Receive touch information, and be converted into contact coordinate, then give processor 1180, and can reception process Order that device 1180 is sent also is performed.Furthermore, it is possible to use resistance-type, condenser type, infrared ray with And the polytype such as surface acoustic wave realizes contact panel 1131.Except contact panel 1131, input block 1130 Other input equipments 1132 can also be included.Specifically, other input equipments 1132 can include but not limit In physical keyboard, function key (such as volume control button, switch key etc.), trace ball, mouse, behaviour Make one or more in bar etc..

Display unit 1140 can be used for showing the information inputted by user or the information being supplied to user and hand The various menus of machine.Display unit 1140 can include display floater 1141, optionally, can use liquid crystal Display (Liquid Crystal Display, LCD), Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) etc. form configure display floater 1141.Further, contact panel 1131 can cover Lid display floater 1141, when contact panel 1131 detects thereon or after neighbouring touch operation, transmits To processor 1180 to determine the type of touch event, with preprocessor 1180 according to the class of touch event Type provides corresponding visual output on display floater 1141.Although in fig. 11, contact panel 1131 It is to realize input and the input function of mobile phone as two independent parts with display floater 1141, but In some embodiments it is possible to by integrated to contact panel 1131 and display floater 1141 and realize mobile phone Input and output function.

Mobile phone may also include at least one sensor 1150, such as optical sensor, motion sensor and its His sensor.Specifically, optical sensor can include ambient light sensor and proximity transducer, wherein, ring Border optical sensor can regulate the brightness of display floater 1141, proximity transducer according to the light and shade of ambient light Display floater 1141 and/or backlight can be closed when mobile phone moves in one's ear.As motion sensor one Kind, accelerometer sensor can detect the size of (generally three axles) acceleration in all directions, time static Can detect that size and the direction of gravity, can be used for identify mobile phone attitude application (such as horizontal/vertical screen switching, Dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, percussion) etc.；Extremely The gyroscope that can also configure in mobile phone, barometer, hygrometer, thermometer, infrared ray sensor etc. other Sensor, does not repeats them here.

Voicefrequency circuit 1160, loudspeaker 1161, microphone 1162 can provide the audio frequency between user and mobile phone Interface.The signal of telecommunication after the voice data conversion that voicefrequency circuit 1160 can will receive, is transferred to loudspeaker 1161, loudspeaker 1161 be converted to voice signal output；On the other hand, microphone 1162 is by collection Voice signal is converted to the signal of telecommunication, voicefrequency circuit 1160 be converted to voice data after receiving, then by audio frequency After data output processing device 1180 processes, through RF circuit 1110 to be sent to such as another mobile phone, or Voice data is exported to memory 1120 to process further.

WiFi belongs to short range wireless transmission technology, and mobile phone can help user by WiFi module 1170 Sending and receiving e-mail, browse webpage and access streaming video etc., it is mutual that it has provided the user wireless broadband Internet interview.Although Figure 11 shows WiFi module 1170, but it is understood that, it does not belong to Must be configured in mobile phone, can omit completely as required in not changing the scope of essence of invention.

Processor 1180 is the control centre of mobile phone, utilizes each of various interface and the whole mobile phone of connection Individual part, by running or perform to be stored in the software program in memory 1120 and/or module, and adjusts By the data being stored in memory 1120, perform the various functions of mobile phone and process data, thus opponent Machine carries out integral monitoring.Optionally, processor 1180 can include one or more processing unit；Preferably, Processor 1180 can integrated application processor and modem processor, wherein, application processor is mainly located Reason operating system, user interface and application program etc., modem processor mainly processes radio communication. It is understood that above-mentioned modem processor can not also be integrated in processor 1180.

Mobile phone also includes the power supply 1190 (such as battery) powered to all parts, it is preferred that power supply is permissible Logically contiguous with processor 1180 by power-supply management system, thus realize management by power-supply management system The functions such as charging, electric discharge and power managed.

Although not shown, mobile phone can also include camera, bluetooth module etc., does not repeats them here.

Can be based on the terminal device shown in this Figure 11 by the step performed by terminal device in above-described embodiment.

The embodiment of the present invention additionally provides another kind of access device, as shown in figure 12, this access device 1200 Bigger difference can be produced because of configuration or performance difference, one or more centre can be included Reason device (central processing units, CPU) 1222 (such as, one or more processors) With memory 1232, one or more storage application program 1242 or storage mediums of data 1244 1230 (such as one or more mass memory units).Wherein, memory 1232 and storage medium 1230 can be of short duration storages or persistently store.The program being stored in storage medium 1230 can include one Or more than one module (diagram does not marks), each module can include a series of fingers in access device Order operation.Further, central processing unit 1222 could be arranged to communicate with storage medium 1230, Access device 1200 performs a series of command operatings in storage medium 1230.

Access device 1200 can also include one or more power supplys 1226, and one or more have Line or radio network interface 1250, one or more input/output interfaces 1258, and/or, one or More than one operating system 1241, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM etc..

Can be based on by the step performed by the first access device or the second access device in above-described embodiment Access device structure shown in this Figure 12.

It should be noted that in above-mentioned access device and terminal device embodiment, included unit It is to carry out dividing according to function logic, but is not limited to above-mentioned division, if the phase of being capable of The function answered；It addition, the specific name of each functional unit is also only to facilitate mutually distinguish, and It is not used in and limits the scope of the invention.

It addition, one of ordinary skill in the art will appreciate that realize whole in above-mentioned each method embodiment or Part steps can be by program and completes to instruct relevant hardware, and corresponding program can be stored in one In kind of computer-readable recording medium, storage medium mentioned above can be read-only storage, disk or CD etc..

These are only the present invention preferably detailed description of the invention, but protection scope of the present invention is not limited to This, any those familiar with the art, can in the technical scope that the embodiment of the present invention discloses The change readily occurred in or replacement, all should contain within protection scope of the present invention.Therefore, the present invention Protection domain should be as the criterion with scope of the claims.

Claims

1. a connection control method, it is characterised in that including:

Described first access device obtains the RSSI that the first signal strength signal intensity instruction RSSI, a described RSSI is the target frequency bands obtained from described second access device, and described target frequency bands belongs to described second access device provides the frequency range of service, comprises unauthorized frequency range；

Determine whether described terminal device is accessed described target frequency bands according to the ratio of a described RSSI Yu described 3rd RSSI.

Method the most according to claim 1, it is characterised in that before determining whether described terminal device is accessed described target frequency bands, described method also includes:

Described first access device terminal device in described first access device coverage sends described target frequency bands, receives the RSSI that the 2nd RSSI, described 2nd RSSI are the described target frequency bands that described terminal device returns；

The described ratio according to a described RSSI and described 3rd RSSI determines whether to include the described target frequency bands of described terminal device access:

According to the ratio of a described RSSI Yu described 3rd RSSI, and described 2nd RSSI determines whether described terminal device is accessed described target frequency bands.

Method the most according to claim 2, it is characterised in that the described ratio according to a described RSSI Yu described 3rd RSSI, and described 2nd RSSI determine whether by described terminal device access described target frequency bands include:

If described 2nd RSSI is less than first threshold, and the ratio of a described RSSI and described 3rd RSSI is less than predetermined threshold, and described terminal device switches to described second access device under described target frequency bands.

Method the most according to claim 3, it is characterised in that described described second access device switched to by described terminal device under described target frequency bands includes:

If described second access device current time slots is opening, determine handover delay be less than described target frequency bands respective channels described opening remaining time after, described terminal device is switched to described second access device under described target frequency bands；

Or, if described second access device current time slots is closed mode, activating described second access device makes described second access device be in opening in current time slots, determine handover delay be less than described target frequency bands respective channels described opening remaining time after, described terminal device is switched to described second access device under described target frequency bands.

Method the most according to claim 4, it is characterised in that before described terminal device switches to described second access device under described target frequency bands, described method also includes:

Determine that described first access device load is higher than load threshold, or, determine that the service priority of described second access device meets switching scheduling requirement, or, determine that described second access device is interfered and meets dispatching requirement.

6. according to method described in claim 1 to 5 any one, it is characterised in that described first access device obtains the first signal strength signal intensity instruction RSSI and includes:

Described first access device obtains described second access device and is currently at the information of closed mode or opening, if described second access device is currently at closed mode, it is determined that a described RSSI is 0.

If described 2nd RSSI is less than first threshold, the ratio of a described RSSI and described 3rd RSSI is more than Second Threshold and less than or equal to 1, and described first access device jumps to described target frequency bands and communicates with described terminal device.

Method the most according to claim 7, it is characterised in that jumping to before described target frequency bands and described terminal device communicate, described method also includes:

Obtain described second access device transmission deadline in described target frequency bands；Described jump to described target frequency bands and communicate with described terminal device and include:

Described transmission deadline after, jump to described target frequency bands and communicate with described terminal device.

9. a connection control method, it is characterised in that including:

Described second access device sends the first signal strength signal intensity instruction RSSI of target frequency bands to described first access device, and described target frequency bands belongs to described second access device provides the frequency range of service, comprises unauthorized frequency range；A described RSSI, determining whether described terminal device is accessed described target frequency bands according to the ratio of a described RSSI Yu described 3rd RSSI for described first access device, described 3rd RSSI is that described second access device measures the RSSI that described target frequency bands obtains；

Method the most according to claim 8, it is characterised in that the described ratio according to a described RSSI and described 3rd RSSI determines whether to include the described target frequency bands of described terminal device access:

According to the ratio of a described RSSI Yu described 3rd RSSI, and described 2nd RSSI determines whether described terminal device is accessed described target frequency bands, and described 2nd RSSI is the RSSI that described terminal device measures that described target frequency bands obtains.

11. methods according to claim 10, it is characterised in that the described ratio according to a described RSSI Yu described 3rd RSSI, and described 2nd RSSI determines whether to include the described target frequency bands of described terminal device access:

If described 2nd RSSI is less than first threshold, and the ratio of a described RSSI and described 3rd RSSI is less than predetermined threshold, determines described second access device being switched to by described terminal device under described target frequency bands.

12. according to method described in claim 11, it is characterised in that described described second access device switched to by described terminal device under described target frequency bands includes:

13. according to method described in claim 9 to 12 any one, it is characterised in that the first signal strength signal intensity instruction RSSI that described second access device sends target frequency bands to described first access device includes:

Described second access device sends described second access device to described first access device and is currently at the information of closed mode or opening, if described second access device is currently at closed mode, the most described RSSI is 0.

14. methods according to claim 10, it is characterised in that the described ratio according to a described RSSI Yu described 3rd RSSI, and described 2nd RSSI determines whether to include the described target frequency bands of described terminal device access:

15. according to method described in claim 14, it is characterised in that described method also includes:

Described second access device sends the transmission deadline of described target frequency bands to described first access device；Described second access device accepts the described target frequency bands of described terminal device access and includes:

Described second access device jumps to described target frequency bands after described deadline and communicates with described terminal device.

16. 1 kinds of connection control methods, it is characterised in that including:

Terminal device receives the target frequency bands that the first access device sends, and described target frequency bands belongs to the second access device provides the frequency range of service, comprises unauthorized frequency range；

Described terminal device measures acquisition secondary signal intensity instruction RSSI to described target frequency bands, sends described 2nd RSSI to described first access device；Described 2nd RSSI, determine whether described terminal device is accessed described target frequency bands according to described 2nd RSSI, a RSSI and the 3rd RSSI for described first access device, described 3rd RSSI is the RSSI that RSSI, a described RSSI are the target frequency bands obtained from described second access device that described second access device measures that described target frequency bands obtains；

Described terminal device switches to described second access device under described target frequency bands according to the switching instruction of described first access device.

17. according to method described in claim 16, it is characterised in that described determine whether that the terminal device in described first access device coverage is switched to described second access device includes according to described 2nd RSSI, a RSSI and the 3rd RSSI:

18. according to method described in claim 17, it is characterised in that described described second access device switched to by described terminal device under described target frequency bands includes:

19. according to method described in claim 16, it is characterised in that described according to a described RSSI, described 2nd RSSI and described 3rd RSSI determine whether by described terminal device access described target frequency bands include:

20. according to method described in claim 19, it is characterised in that jumping to before described target frequency bands and described terminal device communicate, described method also includes:

21. 1 kinds of access devices, use as the first access device, it is characterised in that including:

RSSI acquiring unit, for obtaining the RSSI that the first signal strength signal intensity instruction RSSI, a described RSSI is the target frequency bands obtained from described second access device, described target frequency bands belongs to described second access device provides the frequency range of service, comprises unauthorized frequency range；

Rssi measurement unit, measures acquisition the 3rd RSSI for described first access device to described target frequency bands；

Switch control unit, for determining whether described terminal device is accessed described target frequency bands according to the ratio of a described RSSI Yu described 3rd RSSI.

22. according to access device described in claim 21, it is characterised in that described access device also includes:

Frequency range transmitting element, sends described target frequency bands for the terminal device in described first access device coverage；

RSSI receives unit, for receiving the RSSI that the 2nd RSSI, described 2nd RSSI are the described target frequency bands that described terminal device returns；

23. according to access device described in claim 22, it is characterised in that

Described switch control unit, if for described 2nd RSSI less than first threshold, and the ratio of a described RSSI and described 3rd RSSI is less than predetermined threshold, and described terminal device switches to described second access device under described target frequency bands.

24. according to access device described in claim 23, it is characterised in that

Described switch control unit, if being opening specifically for described second access device current time slots, determine handover delay be less than described target frequency bands respective channels described opening remaining time after, described terminal device is switched to described second access device under described target frequency bands；

25. according to access device described in claim 24, it is characterised in that

Described switch control unit, it is additionally operable to before described second access device described terminal device being switched under described target frequency bands, determine that described first access device load is higher than load threshold, or, determine that the service priority of described second access device meets switching scheduling requirement, or, determine that described second access device is interfered and meets dispatching requirement.

26. according to access device described in claim 23 to 25 any one, it is characterised in that

Described RSSI acquiring unit, is currently at the information of closed mode or opening, if described second access device is currently at closed mode, it is determined that a described RSSI is 0 specifically for obtaining described second access device.

27. according to access device described in claim 22, it is characterised in that

Described switch control unit, if, less than first threshold, the ratio of a described RSSI and described 3rd RSSI jump to described target frequency bands communicate more than Second Threshold and less than or equal to 1 with described terminal device specifically for described 2nd RSSI.

28. according to access device described in claim 27, it is characterised in that described access device also includes:

Time acquisition unit, for jumping to before described target frequency bands and described terminal device communicate at described switch control unit, obtains described second access device transmission deadline in described target frequency bands；

Described switch control unit, specifically for described transmission deadline after, jump to described target frequency bands and communicate with described terminal device.

29. 1 kinds of access devices, use as the second access device, it is characterised in that including:

RSSI transmitting element, for sending the first signal strength signal intensity instruction RSSI of target frequency bands to described first access device, described target frequency bands belongs to described second access device provides the frequency range of service, comprises unauthorized frequency range；A described RSSI, determining whether described terminal device is accessed described target frequency bands according to the ratio of a described RSSI Yu described 3rd RSSI for described first access device, described 3rd RSSI is that described second access device measures the RSSI that described target frequency bands obtains；

30. according to access device described in claim 26, it is characterised in that the described ratio according to a described RSSI and described 3rd RSSI determines whether to include the described target frequency bands of described terminal device access:

31. according to access device described in claim 30, it is characterised in that the described ratio according to a described RSSI Yu described 3rd RSSI, and described 2nd RSSI determines whether to include the described target frequency bands of described terminal device access:

32. according to access device described in claim 31, it is characterised in that described described second access device switched to by described terminal device under described target frequency bands includes:

33. according to access device described in claim 30 to 32 any one, it is characterised in that

Described RSSI transmitting element, is specifically currently at the information of closed mode or opening with sending described second access device to described first access device, if described second access device is currently at closed mode, the most described RSSI is 0.

34. according to access device described in claim 30, it is characterised in that the described ratio according to a described RSSI Yu described 3rd RSSI, and described 2nd RSSI determines whether to include the described target frequency bands of described terminal device access:

If described 2nd RSSI is less than first threshold, the ratio of a described RSSI and described 3rd RSSI, more than Second Threshold and less than or equal to 1, jumps to described target frequency bands and communicates with described terminal device.

35. according to access device described in claim 34, it is characterised in that described access device also includes:

Time transmitting element, for sending the transmission deadline of described target frequency bands to described first access device；

Described access accepts unit, communicates with described terminal device for jumping to described target frequency bands after described deadline.

36. 1 kinds of terminal devices, it is characterised in that including:

UHF band reception unit, for receiving the target frequency bands that the first access device sends, described target frequency bands belongs to the second access device provides the frequency range of service, comprises unauthorized frequency range；

Rssi measurement unit, for measuring acquisition secondary signal intensity instruction RSSI to described target frequency bands；

RSSI transmitting element, for sending described 2nd RSSI to described first access device；Described 2nd RSSI, determine whether described terminal device is accessed described target frequency bands according to described 2nd RSSI, a RSSI and the 3rd RSSI for described first access device, described 3rd RSSI is the RSSI that RSSI, a described RSSI are the target frequency bands obtained from described second access device that described second access device measures that described target frequency bands obtains；

Switch control unit, switches to described second access device under described target frequency bands for the switching instruction according to described first access device.

37. according to terminal device described in claim 36, it is characterised in that described determine whether that the terminal device in described first access device coverage is switched to described second access device includes according to described 2nd RSSI, a RSSI and the 3rd RSSI:

38. according to terminal device described in claim 37, it is characterised in that described described second access device switched to by described terminal device under described target frequency bands includes:

If described second access device current time slots is opening, determine handover delay be less than described target frequency bands respective channels described opening remaining time after, described terminal device is switched to described second access device under described target frequency bands；Or, if described second access device current time slots is closed mode, activating described second access device makes described second access device be in opening in current time slots, determine handover delay be less than described target frequency bands respective channels described opening remaining time after, described terminal device is switched to described second access device under described target frequency bands.

39. according to terminal device described in claim 36, it is characterised in that described according to a described RSSI, described 2nd RSSI and described 3rd RSSI determine whether by described terminal device access described target frequency bands include:

40. according to terminal device described in claim 39, it is characterised in that jumping to before described target frequency bands and described terminal device communicate, and described first access device obtains described second access device transmission deadline in described target frequency bands；

Described jump to described target frequency bands and communicate with described terminal device and include: after described transmission deadline, jump to described target frequency bands and communicate with described terminal device.