CN102595631A

CN102595631A - Random access method, base station and terminal

Info

Publication number: CN102595631A
Application number: CN2011100031646A
Authority: CN
Inventors: 张亮亮; 柴丽; 蔺波; 时洁
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2011-01-07
Filing date: 2011-01-07
Publication date: 2012-07-18

Abstract

The invention discloses a random access method, a base station and a terminal, belonging to the technical field of communication. The method comprises the following steps that: the base station receives an uplink random access message transmitted by the terminal; the base station transmits a downlink random access message to the terminal on a protected subframe, thereby enabling the terminal to access to the base station. The base station comprises a receiving module and a transmitting module. The terminal comprises a transmitting module and a receiving module. The downlink random access message is transmitted to the terminal via the protected subframe, in this way, the aim of reducing the downlink interference of an encroaching base station to the base station while accessing is realized, in comparison with the prior art, the technical method of the embodiment of the invention can make the terminal be free from the downlink interference in the random access competition and the random access process, the access success rate is improved, and the communication performance is also improved.

Description

Accidental access method, base station and terminal

Technical field

The present invention relates to communication technical field, particularly a kind of accidental access method, base station and terminal.

Background technology

In having the network of presence of intercell interference; With LTE (Long Term Evolution; Long Term Evolution) heterogeneous network is an example; Shown in Fig. 1 a, be placed with small base station in macro base station (Macro eNB) coverage, like little base station (Pico), Home eNodeB (HeNB), Home eNodeB (Femto), relay station WAPs such as (Relay).UE (User Equipment, user terminal) in the small base station coverage is under the dual covering of Macro eNB and small base station so.Shown in Fig. 1 a, the UE1 under the Pico has received the interference of macro base station, is near the UE2 of the macro base station of HeNB, because do not insert authority, also can receive the interference of HeNB.Usually, the sub-district that will be disturbed is called the sub-district that is injured, and disturbs the sub-district of this UE2 to be called the infringement sub-district.Under this heterogeneous network, UE is connected in the sub-district, and this sub-district is called the Serving cell of UE, and generally can there be one or more sub-districts a base station.Because frequency resource is most valuable, an important solution is that small base station and macro base station adopt with disposing frequently, and for descending, downstream signal is sent in these base stations on same carrier wave, comprises descending control domain signal and downlink data territory signal.UE can receive when communicating by letter with its Serving cell that the cell signal of another base station disturbs; Particularly descending interference is initiated to insert in the sub-district that is injured when the terminal, needs to receive the descending sub frame of sub-district; If the descending sub frame of sub-district is just disturbed; Access failure can cause dropped calls because can't receive descending sub frame will to cause the terminal, and communication performance is poor.

Summary of the invention

The embodiment of the invention provides a kind of accidental access method and base station.Said technical scheme is following:

On the one hand, a kind of accidental access method comprises:

The uplink random that the base station receiving terminal sends inserts message;

Said base station is sent descending random accessing message and is given the terminal on protected subframe, make said terminal insert said base station.

On the other hand, a kind of accidental access method comprises:

The terminal is sent uplink random to the base station and is inserted message;

Said terminal receives the descending random accessing message that send said base station on protected subframe, and according to said descending random accessing message access base station.

Another aspect, a kind of accidental access method comprises:

The terminal is sent uplink random to the base station and is inserted message;

When the terminal does not receive the feedback of said base station or attempts preset times in preset duration after, not receiving feedback, district reselecting or cell selecting are carried out according to the actual RSRP of candidate base station in said terminal, and insert the base station of selecting.

A kind of base station comprises:

Receiver module is used for the uplink random access message that receiving terminal sends;

Sending module is used on protected subframe, sending descending random accessing message and gives the terminal, makes said terminal insert said base station.

A kind of terminal comprises:

Sending module is used for sending uplink random to the base station and inserts message;

Receiver module is used to receive the descending random accessing message that send said base station on protected subframe, and according to said descending random accessing message access base station.

A kind of terminal comprises:

The cell selecting module when being used for when the terminal does not receive the feedback of said base station or attempts preset times in preset duration after, not receiving feedback, being carried out district reselecting or cell selecting according to the actual RSRP of candidate base station, and is inserted the base station of selecting.

The beneficial effect of the technical scheme that the embodiment of the invention provides is:

Send descending random accessing message through using protected subframe to the terminal; Reached to be reduced in and encroached on the purpose of base station when inserting the descending interference of this base station; Compared with prior art, the technical method of present embodiment can make the terminal in access contention and random access procedure at random, not receive the influence of descending interference; Improve the access success rate, improved communication performance.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 a is the common heterogeneous network sketch map that covers of macro base station and small base station;

Fig. 1 b is that a kind of infringement sub-district subframe and terminal of comprising that the embodiment of the invention provides belongs to the contrast sketch map of the sub-district subframe of being injured;

Fig. 2 is the flow chart of a kind of accidental access method of providing of the embodiment of the invention;

Fig. 3 is the flow chart of a kind of accidental access method of providing of the embodiment of the invention;

Fig. 4 is the flow chart of a kind of accidental access method of providing of the embodiment of the invention;

Fig. 5 is the flow chart of a kind of accidental access method of providing of the embodiment of the invention;

Fig. 6 is the flow chart of a kind of accidental access method of providing of the embodiment of the invention;

Fig. 7 is the flow chart of a kind of accidental access method of providing of the embodiment of the invention;

Fig. 8 is the structural representation of a kind of base station of providing of the embodiment of the invention;

Fig. 9 is the structural representation of the another kind of base station that provides of the embodiment of the invention;

Figure 10 is the structural representation of another base station of providing of the embodiment of the invention;

Figure 11 is the structural representation at a kind of terminal of providing of the embodiment of the invention;

Figure 12 is the structural representation at the another kind of terminal that provides of the embodiment of the invention;

Figure 13 is the structural representation at another terminal of providing of the embodiment of the invention;

Figure 14 is the structural representation at another terminal of providing of the embodiment of the invention;

Figure 15 is the structural representation at another terminal of providing of the embodiment of the invention;

Figure 16 is the flow chart of a kind of reorientation method of providing of the embodiment of the invention;

Figure 17 is the flow chart of a kind of reorientation method of providing of the embodiment of the invention;

Figure 18 is the flow chart of a kind of reorientation method of providing of the embodiment of the invention;

The structural representation of the another kind of base station that Figure 19 provides for the embodiment of the invention;

The structural representation at the another kind of terminal that Figure 20 provides for the embodiment of the invention.

Embodiment

For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.

The flow chart of a kind of accidental access method that Fig. 2 provides for the embodiment of the invention.The executive agent of the accidental access method of present embodiment is the base station, and this base station is the base station that is injured, and it receives another base station down and disturbs; And cause the base station of descending interference to be the infringement base station to this base station, as shown in Figure 2, the accidental access method of present embodiment specifically can may further comprise the steps:

201: the uplink random that the base station receiving terminal sends inserts message;

This terminal such as portable terminal or access point etc.; This uplink random inserts message and comprises preamble or scheduled transmission message.

202: this base station is sent descending random accessing message and is given the terminal on protected subframe, makes this terminal insert this base station.

This protected subframe is to being close to blank subframe in the infringement base station of base station.

Particularly; Signal is sent at the running time-frequency resource place of some subframe in the infringement base station; Do not send signal in the subframe on other time or only send few signals, these subframes are called blank subframe (ABS (Almost Blank Subframe also cries to be close to blank subframe)).The ABS subframe of infringement base station (perhaps encroaching on the sub-district) in the base station that is injured (sub-district perhaps is injured) locate corresponding subframe and be called as this protected subframe and (can also be called low interfering subframe; The perhaps corresponding protected subframe of ABS subframe, the low interfering subframe that the ABS subframe is corresponding.Sometimes directly abbreviated as the ABS subframe, this not the influence technique personnel understand the enforcement of technical scheme, the present invention for simplicity, claims that this subframe is protected subframe in description).Be injured the base station when carrying out downlink communication at this protected subframe place, encroach on the base station accordingly and on the ABS subframe, do not send signal basically, relatively low to the interference of the base station that is injured thus.

For the ease of understanding; Fig. 1 b has provided a kind of infringement sub-district subframe (also can be described as infringement base station subframe) that comprises that the embodiment of the invention provides; With the be injured contrast sketch map of sub-district subframe (also can be described as the base station subframe of being injured) of terminal place; In this instance be the infringement base station with the macro base station, macro base station subordinate's small base station is that example is explained for the base station that is injured, but thisly is not used in qualification the present invention for example.Can see that the subframe of infringement sub-district comprises ABS subframe and common subframe.The subframe of infringement sub-district and small base station and small base station subordinate UE is synchronous.What be positioned at the identical moment with the ABS subframe of infringement sub-district is the protected subframe (perhaps low interfering subframe etc., this no longer repeats the multiple title that possibly exist) of UE, in Fig. 1 b, representes with white spaces.And the subframe of infringement sub-district transceive data is common subframe, and what be positioned at the identical moment with the common subframe in infringement sub-district is the common subframe of UE, is also referred to as the high interference subframe of UE, in Fig. 1 b, representes with the black space.

Certainly, more than be merely for example and be convenient to understand, for UE; Cause the disturbance regime difference of its different subframes to have multiple reason; But more common situation is that promptly non-UE service node causes by other outer node of UE service node, for example before described macro base station; Perhaps from other and the website that the UE serving BS overlaps on frequency domain, present embodiment does not limit this.But the interference that the interference source of some moment UE causes maybe be less, forms protected subframe.Except the ABS subframe of macro base station; MBSFN (Multicast/Broadcast Single Frequency Network with macro base station; Multicast broadcast single frequency network) the corresponding UE subframe of subframe also can be thought low interfering subframe, and this is because macro base station MBSFN subframe does not form interference to adjacent small base station subordinate UE.Present embodiment is not done qualification to the formation reason of low interfering subframe; As long as less than the interference that on common subframe, receives this non-UE service node, then this specific sub-frame promptly can be used as the protected subframe (perhaps claiming low interfering subframe etc.) of UE or its access website in the interference that receives non-UE service node on a certain specific sub-frame for this UE or its access website.

Be not in embodiments of the present invention all protected subframes be protected subframe all by system configuration; Protected sub-frame configuration can be: the part in the protected subframe (subclass).That is to say that the infringement base station can only be notified the part of its ABS subframe to the base station that is injured, the feasible base station that is injured can use the corresponding protected subframe of that part of ABS subframe of infringement base station notice to carry out said method.

The accidental access method of present embodiment; Encroach on the purpose of base station when inserting through using protected subframe to send descending random accessing message, reached to be reduced in, compared with prior art to the descending interference of this base station to the terminal; The technical method of present embodiment; Can make the terminal in access contention and random access procedure at random, not receive the influence of descending interference, improve the access success rate, improve communication performance.

Said random accessing message is used to realize the at random access of terminal to the base station, and uplink random inserts message and sends to the base station by the terminal, can be to be used to carry out preamble or the scheduled transmission message (Scheduled Transmission) that inserts at random; Descending random accessing message is sent to the terminal by the base station, can be accidental access response or competition solution message, and present embodiment is not done qualification to this.

Fig. 3 is the flow chart of the another kind of accidental access method that provides of the embodiment of the invention.As shown in Figure 3, the accidental access method of present embodiment specifically can may further comprise the steps:

301: the preamble that the base station receiving terminal sends;

In random access procedure, preamble is sent to the base station in the terminal, to initiate random access procedure.

Preamble step content is sent to the base station in the terminal in addition, can be the content among the embodiment 5, and for example this preamble is special-purpose preamble.

Whether the resource that preamble or uplink random access message are sent to the base station in the terminal is private resource, and content is said among particular content such as the embodiment 4.

Before this step 301, also comprise:

When definition RACH resource distribution in base station is disposed with ABS subframe (perhaps protected subframe), based on a principle:

1), in [N+3, N+3+ra-ResponseWindowSize] ms, guarantees to have an ABS subframe so at least if it is the N subframe that the configuration subframe of a RACH is arranged; Perhaps

2), in [M-3-ra-ResponseWindowSize, M-3] ms, guarantee to have a RACH subframe so at least if it is the M subframe that the configuration subframe of an ABS is arranged;

Wherein, the size of time window among the present invention (ra-ResponseWindowSize) can not done concrete qualification by base station or terminal decision in the embodiment of the invention.

Particularly; The RACH resource distribution that is used to send preamble to the terminal; Terminal RACH resource distribution can be notified through following method in the base station: the base station is broadcast base station system information or RRC (RRC-radio resource control in this base station range; Radio Resource control) message is carried the running time-frequency resource that is used to send preamble (can be time-domain resource, perhaps frequency domain resource or time-frequency domain resources) of base station assigns in this system information or the RRC message.For example in system information, defined the running time-frequency resource that the terminal of this sub-district is inserted at random.In PRACH-config, comprised prach-ConfigurationIndex; Stipulated subframe (one or more subframe that can insert at random at the terminal; Perhaps subframe pattern (pattern)); Also comprised Prach-FrequencyOffset, the beginning frequency point of having stipulated to insert at random at the terminal (like the Resource Block of correspondence number), the frequency bandwidth that the corresponding frequency bandwidth of 6 Resource Block (RB resource block) that is risen by this beginning frequency point inserts as the terminal at random.

Alternatively, can also comprise before this step 301: the terminal obtains the sub-frame configuration or the protected sub-frame configuration of this base station.The terminal can be to receive interfered with terminal in addition; If; Then according to the sub-frame configuration or the protected sub-frame configuration of this base station that obtains; After subframe, comprise in one section time domain scope on the subframe of protected subframe or on the corresponding sub-frame of uplink of the protected subframe of said base station and send preamble to this base station, said one section time domain scope can preestablish.Wherein, the corresponding sub-frame of uplink of protected subframe is meant the corresponding sub-frame of uplink of protected subframe on synchronization.

Particularly,, obtain the sub-frame configuration or the protected sub-frame configuration of said base station, specifically comprise to terminal (before execution in step 301) before initiating access:

Thus; The terminal receives system information or RRC message; And know RACH resource allocation information and ABS subframe configuration information through system information or RRC message, and then obtain thereafter to comprise in one section time domain scope the subframe of protected subframe, for example; This subframe can be for satisfying the N sub-frame that has an ABS subframe relation among [N+3, N+3+ra-ResponseWindowSize] ms at least; Or, obtain the corresponding sub-frame of uplink of the protected subframe of said base station.

In another embodiment of the present invention, the terminal obtains the sub-frame configuration or the protected sub-frame configuration of said base station, specifically comprises: the sub-frame configuration or the protected sub-frame configuration of source base station notice terminal this base station of terminal before inserting this base station.Alternatively, when the terminal switched to this base station (target BS) from source base station, the source base station at this terminal notified the ABS subframe of target BS to this terminal.Particularly, the source base station at terminal (as being the infringement base station) gives this terminal when being used to switch to this neighbor cell (target BS corresponding district) sending switch indicating information, has comprised the sub-frame configuration (or protected sub-frame configuration of this sub-district) of this sub-district.Perhaps, the terminal is before initiating access, and through intercepting the protected sub-frame configuration that said base station corresponding district system information has obtained said base station, the present invention obtains the method for the protected sub-frame configuration of said base station and do not do concrete qualification to the terminal.

302: the base station is according to coming the preamble of self terminal, judges in one section time domain scope after the place subframe of this preamble whether comprise protected subframe; Said one section time domain scope can preestablish;

If then execution in step 303;

If, then do not carry out random access procedure.

How to judge to step 302 base station and whether comprise protected subframe in one section time domain scope after the place subframe of this preamble: for example; Based on the setting principle described in the step 301; Judge in one section time domain scope after the place subframe of this preamble whether comprise protected subframe, specifically comprise:

If being used to send the subframe of this preamble is the N subframe, then judge in [N+3, N+3+ra-ResponseWindowSize] ms whether comprise at least one protected subframe.

Wherein, this section time domain scope is provided with by the base station, and the embodiment of the invention is not done concrete qualification.

In addition, this step 302 can also for: base station according to the preamble that comes self terminal, whether this preamble place subframe is the corresponding sub-frame of uplink of the protected subframe of this base station;

303: the base station is sent to insert at random on protected subframe and is replied message to the terminal;

It is descending random accessing message that message (RA-preamble) is replied in access at random in this step.

Based on example in the step 301, in this step 303, the base station is sent to insert at random in [N+3, N+3+ra-ResponseWindowSize] ms and is replied message; Because the terminal begins to open ra-ResponseWindow on (N+3) subframe, the size of this ra-ResponseWindow is called ra-ResponseWindowSize, and particularly, the span of ra-ResponseWindowSize can be [2,10] ms.If in this ra-ResponseWindow, do not receive the answer of base station, this access failure is thought at the terminal so.

Alternatively; Insert the situation that comprises protected subframe in one section time domain scope after message belongs to subframe to uplink random; This step 303 can also for: comprise protected subframe if uplink random inserts in one section time domain scope after the subframe of message place, then send descending random accessing message on the protected subframe of base station in this section time domain scope and give the terminal.

Need to prove that in this step 303, the base station also provides the upstream bandwidth of the scheduled transmission message in the forwarding step 304 for the terminal.

Alternatively, can also comprise before this step 303: judge that whether this terminal is for receiving interfered with terminal.This deterministic process can be after step 302, carry out before the step 303, also can before step 302, carry out.When this deterministic process is carried out after step 302, before the step 303; Can be used for when comprising protected subframe or preamble place subframe in one section time domain scope confirming after the terminal is to receive interfered with terminal and preamble place subframe execution in step 303 for the corresponding sub-frame of uplink of the protected subframe of this base station; When this deterministic process is carried out before the step 302, can confirm that the terminal when receiving interfered with terminal, sends descending random accessing message to the terminal on protected subframe.

304: scheduled transmission message is sent to the base station in the terminal after receiving the descending random accessing message of sending the base station;

Simultaneously, start timer mac-ContentionResolutionTimer.If the terminal does not have to receive in overtime the answer of base station at timer, think access failure so.

305: the base station receives scheduled transmission message, on protected subframe, sends feedback contention-based solution message (contention solution) to the terminal.

In this step 305, feedback contention-based solution message also is a kind of of descending random accessing message.

Based on example in the step 301, in step 303, the base station is at i subframe (descending sub frame) dispatch terminal, so that scheduled transmission message is sent in K subframe (sub-frame of uplink) in the terminal.The base station is sent feedback contention-based solution message and is given the terminal on an ABS subframe in [K+1, K+mac-ContentionResolutionTimer] ms so.

Through above-mentioned steps 301-305, the terminal accomplished and the base station between access process at random.This step 305 is optional steps.Under non-competing access situation, be dedicated preamble (or specific preamble) like preamble particularly, as being a certain predefined preamble, execution in step 305.

In embodiments of the present invention; When the terminal is not when receiving interfered with terminal, it inserts the descending interference that does not receive other base stations at random, so to this situation; Both can insert, also can insert according to method provided by the invention according to cut-in method of the prior art.

The accidental access method of present embodiment; When judging the subframe that comprises protected subframe in one section time domain scope after the preamble place subframe of sending at the terminal or preamble place subframe for the corresponding sub-frame of uplink of the protected subframe of this base station; This base station uses protected subframe to send descending random accessing message to the terminal, has reached to be reduced in to encroach on the purpose of base station to the descending interference of this base station when inserting, compared with prior art; The technical method of present embodiment; Can make the terminal in access contention and random access procedure at random, not receive the influence of descending interference, improve the access success rate, improve communication performance.

Fig. 4 is the flow chart of the another kind of accidental access method that provides of the embodiment of the invention.As shown in Figure 4, the accidental access method of present embodiment specifically can may further comprise the steps:

401: the preamble that the base station receiving terminal sends;

402: the base station judges according to the preamble that comes self terminal whether this preamble place running time-frequency resource is private resource; If give this terminal so that the base station uses protected subframe to send downstream message.

That is to say that specifically alternatively, private resource is used by interfered with terminal to giving, promptly the base station can know that through said private resource this terminal is one and receives interfered with terminal;

If then execution in step 403;

If, then do not carry out random access procedure.

This private resource is the subclass that the RACH configuration is carried out in the base station, or RACH is configured to outer resource.Particularly, this private resource can comprise following three kinds of situation, special frequency resource, special-purpose time-domain resource or special-purpose running time-frequency resource.

First kind of situation when this private resource is special frequency resource, can be the subclass of the RACH frequency resource of base station configuration, also can be the RACH resource frequency resource in addition of base station configuration, the i.e. frequency bandwidth of a redetermination.

Particularly; When special frequency resource is the subclass of the RACH frequency resource of base station configuration; The pairing frequency bandwidth of certain several Resource Block of the frequency bandwidth that for example, this special frequency resource 6 Resource Block (RB resource block) that can be used for inserting at random for the terminal are corresponding.Especially, for example can be to comprise n the pairing bandwidth resources N-RBs of RB that begins from this beginning frequency point.

Particularly; When special frequency resource is the RACH resource frequency resource in addition of base station configuration; By the new frequency bandwidth resource of base station definition, new especially frequency bandwidth resource such as new beginning frequency point or n the pairing bandwidth resources of RB that begin from this beginning frequency point.

Those skilled in the art can know that system information comprises the beginning frequency point prach-FrequencyOffset that is used to insert or comprises prach-FrequencyOffse and n the pairing bandwidth resources N-RBs of RB that begins from this beginning frequency point.

Second kind of situation when this private resource is special-purpose time-domain resource, can be the subclass of the RACH time-domain resource of base station configuration, also can be the RACH resource time-domain resource in addition of base station configuration, the i.e. sub-frame resources of a redetermination.Particularly; When special-purpose time-domain resource is the subclass of the RACH time-domain resource of base station configuration; For example be that the some or several sub-frame in the former RACH sub-frame configuration are used at the terminal; Can comprise the subframe that this receives interfered with terminal that is exclusively used in RACH sub-frame configuration prach-ConfigurationIndex and this sub-frame configuration especially, being used for this subframe that receives interfered with terminal can represent with the mode of bitmap.When special-purpose time-domain resource is the RACH resource time-domain resource in addition of base station configuration, i.e. the RACH sub-frame configuration of redetermination.Define new RACH sub-frame configuration by the base station, comprise RACH sub-frame configuration prach-ConfigurationIndex (this index is the index of redetermination).

The third situation; This private resource is the subclass of the RACH resource of base station configuration; Or the running time-frequency resource beyond the RACH resource of base station configuration; When this private resource is the subclass of RACH resource of base station configuration, comprise RACH sub-frame configuration prach-ConfigurationIndex (this index is the index of redetermination), also comprise the beginning frequency point that the terminal of Prach-FrequencyOffset regulation inserts at random (like the Resource Block of correspondence number).Further, also comprise the frequency bandwidth that the corresponding frequency bandwidth of n Resource Block (RB resource block) that this beginning frequency point rises inserts as the terminal at random; Or give tacit consent to the frequency bandwidth that the corresponding frequency bandwidth of n Resource Block (RB resource block) that this beginning frequency point rises inserts as the terminal at random.

Above-mentioned special frequency resource or special-purpose time-domain resource or special-purpose running time-frequency resource, the terminal can obtain through said base station, also can obtain through source base station (base station of being inserted at the preceding terminal of step 401 perhaps belongs to corresponding base station, sub-district).Particularly, said information etc. can be notified to the terminal through system information or the special RRC that send the base station in the terminal.

403: the base station is sent to insert at random on protected subframe and is replied message to the terminal;

Alternatively, can also comprise before this step 403: judge that whether this terminal is for receiving interfered with terminal.This deterministic process can be after step 402, carry out before the step 403, also can before step 402, carry out.When this deterministic process is carried out after step 402, before the step 403, can be used for when confirming that the terminal is that the preamble that sent by interfered with terminal and this terminal belongs to running time-frequency resource when being private resource, execution in step 403; When this deterministic process was carried out before step 402, can be used for when confirming the terminal for receiving interfered with terminal, on protected subframe, sending descending random accessing message to give the terminal.

404: scheduled transmission message is sent to the base station in the terminal after receiving the descending random accessing message of sending the base station;

405: the base station receives scheduled transmission message, on protected subframe, sends feedback contention-based solution message (contention solution) to the terminal;

This step 403-405 is descending random accessing message is sent in the base station on protected subframe a process, and the process among this process and the step 303-305 is similar, repeats no more at this.

The accidental access method of present embodiment; Through judging whether the preamble place time-domain resource of sending at the terminal or frequency domain resource or running time-frequency resource are private resource,, use protected subframe to send descending random accessing message to the terminal if when the preamble that send at said terminal place time-domain resource or frequency domain resource or running time-frequency resource are private resource; Reached to be reduced in and encroached on the purpose of base station when inserting the descending interference of this base station; Compared with prior art, the technical method of present embodiment can make the terminal in access contention and random access procedure at random, not receive the influence of descending interference; Improve the access success rate, improved communication performance.

Fig. 5 is the flow chart of the another kind of accidental access method that provides of the embodiment of the invention.It is as shown in Figure 5,

The accidental access method of present embodiment specifically can may further comprise the steps:

501: the preamble that the base station receiving terminal sends;

502: the base station judges according to the preamble that comes self terminal whether this preamble is dedicated preamble;

If then execution in step 503;

If, then do not carry out random access procedure.

Wherein, Dedicated preamble can a special use preamble; For example can be said base station assigns, or this preamble of agreement acquiescence gives exactly and receive interfered with terminal usefulness, promptly the base station receives dedicated preamble and can know that this terminal is one and receives interfered with terminal.Dedicated preamble can also be organized the preamble in (like preamble groupA or group B) by preamble, can also be the new preamble group of dividing or the preamble of dedicated preamble group.

503: the base station is sent to insert at random on protected subframe and is replied message to the terminal;

Alternatively, can also comprise before this step 503: judge that whether this terminal is for receiving interfered with terminal.This deterministic process can be after step 502, carry out before the step 503, also can before step 502, carry out.When this deterministic process is carried out after step 502, before the step 503, can be used for when confirming that the terminal is when receiving the preamble of interfered with terminal and the transmission of this terminal to be dedicated preamble, execution in step 503; When this deterministic process is carried out before the step 502, can be used to confirm the terminal for receiving interfered with terminal, when on protected subframe, sending descending random accessing message and giving the terminal.

504: scheduled transmission message is sent to the base station in the terminal after receiving the descending random accessing message of sending the base station.

Step 503-504 is identical with above-mentioned steps 403-404 principle, and step is similar, repeats no more.

Alternatively; In the present embodiment, because preamble is a dedicated preamble, so this access procedure is the access procedure under the non-competing situation; So when the scheduled transmission message in the terminal forwarding step 504; Access procedure is accomplished, and the terminal is inserted successfully, so the base station need not to carry out the step that similar step 405 is sent feedback contention-based solution message.

The accidental access method of present embodiment; Whether through judging that preamble is sent at the terminal is dedicated preamble, and when terminal transmission preamble is dedicated preamble, uses protected subframe to send descending random accessing message to the terminal; Reached to be reduced in and encroached on the purpose of base station when inserting the descending interference of this base station; Compared with prior art, the technical method of present embodiment can make the terminal in access contention and random access procedure at random, not receive the influence of descending interference; Improve the access success rate, improved communication performance.

Fig. 6 is the flow chart of the another kind of accidental access method that provides of the embodiment of the invention.The executive agent of this embodiment is the terminal, and this terminal can be portable terminal or WAP etc., and as shown in Figure 6, the accidental access method of present embodiment specifically can may further comprise the steps:

601: the terminal is sent uplink random to the base station and is inserted message;

602: this terminal receives the descending random accessing message that send this base station on protected subframe, and according to this descending random accessing message access base station.

Wherein, the terminal is sent uplink random to the base station and is inserted message, specifically comprises:

This terminal is sent uplink random and is inserted message, and this uplink random inserts in one section time domain scope after the subframe of message place and comprises protected subframe; Or,

This terminal is sent uplink random and is inserted message on the corresponding sub-frame of uplink of the protected subframe of this base station; Or,

This terminal is sent uplink random to this base station and is inserted message on private resource; Or,

Dedicated preamble is sent to this base station in this terminal.

Alternatively, before uplink random access message was sent in the base station, this method also comprised at this terminal:

Confirm that this terminal is for receiving interfered with terminal.

This base station is sent descending random accessing message through using protected subframe to the terminal; Reached to reduce and encroached on the purpose of base station when the terminal is inserted the descending interference of this base station; Compared with prior art, the technical method of present embodiment can reduce terminal (particularly receiving interfered with terminal) receives descending interference in access contention and random access procedure at random influence; Improve the access success rate, improved communication performance.

Fig. 7 is the flow chart of the another kind of accidental access method that provides of the embodiment of the invention.As shown in Figure 7, the accidental access method of present embodiment specifically can may further comprise the steps:

701: the terminal is sent uplink random to the base station and is inserted message;

Further, RACH sub-frame configuration and ABS sub-frame configuration are known in the terminal, and send uplink random access message according to this RACH sub-frame configuration and ABS sub-frame configuration to the base station, and this uplink random inserts message can be preamble or scheduled transmission message.

Particularly, the terminal can obtain the configuration of RACH running time-frequency resource through system information or RRC message.

Particularly, the terminal can also obtain the protected sub-frame configuration of this base station through system information or RRC message.

702: when after in preset duration, not receiving the feedback of this base station or attempting preset times, not receiving feedback, district reselecting or cell selecting are carried out according to the actual RSRP of candidate base station in this terminal, to insert the base station of selecting.

Those skilled in the art can be known; In the prior art for the elevator system capacity; Receive more terminal to insert, the criterion that has proposed a terminal cell selecting under small base station (like pico, the femto website) scene is being arranged; When the above-mentioned formula of CellID=argmax{i}{RSRP_i+bias_i} shows to certain cell i; The RSRP of this sub-district that the terminal obtains equals the bias (promptly increasing a side-play amount) that the measured RSRPi in terminal adds this sub-district, and to the RSRP that the terminal is obtained in each sub-district, the terminal is chosen the maximum pairing sub-district of that RSRP and inserted as Serving cell.

In the present embodiment, particularly, when the terminal after the base station has been sent uplink random and has been inserted message, correspondingly can start a timer, this timer has been stipulated preset duration, when the feedback of in preset duration, not receiving the base station, then thinks this access failure.The terminal obtains RSRP (the Reference Singal Received Prower of other base stations beyond this base station; Reference Signal Received Power); Be with difference of the prior art; The side-play amount of terminal disregards district reselecting (bias), as cell reselection criteria, the base station of selecting to meet terminal requirements is inserted with the actual RSRP of these other base stations.

Perhaps, when the terminal after the base station has been sent uplink random and has been inserted message, when attempting not receiving the feedback of base station after the preset times, this access failure then, terminal disregards is used for the side-play amount of district reselecting, selects other base stations beyond this base station to insert.

Before step 701, this method can also comprise: confirm that this terminal is for receiving interfered with terminal.Particularly; Confirm that this terminal is one and receives interfered with terminal; Can be that acquisition is passed through to measure in the terminal; Can to be the terminal obtain to be one in this base station corresponding district (these sub-districts of 701 steps) through the cell-of-origin indication when cell-of-origin (terminal carry out 701 steps before residing sub-district) receives interfered with terminal etc., does not do concrete qualification in this present invention.

For receiving interfered with terminal, utilize the method for above-mentioned steps 701-step 702 can avoid repeating selecting the being injured sub-district of base station, influence terminal communication.The terminal is ignored the side-play amount that is used for district reselecting and is carried out district reselecting after the sub-district failure of base station is injured in access, has further improved the communication performance at terminal.

The accidental access method of present embodiment through the feedback use cell reselection criteria of terminal according to the base station, inserts so that search other base stations; Reached and encroached on the purpose of base station when avoiding inserting the descending interference of base station; Compared with prior art, the technical method of present embodiment can make the terminal in access contention and random access procedure at random, not receive the influence of descending interference; Improve the access success rate, improved communication performance.

Fig. 8 is the structural representation of a kind of base station of providing of the embodiment of the invention.As shown in Figure 8, the base station of present embodiment specifically can comprise: receiver module 801 and sending module 802,

Wherein, receiver module 801 is used for the uplink random access message that receiving terminal sends;

Wherein, sending module 802 is used on protected subframe, sending descending random accessing message and gives the terminal, makes said terminal insert said base station.

Referring to Fig. 9, said sending module 802 comprises:

The first transmitting element 802a if be used for comprising protected subframe in one section time domain scope after said uplink random inserts message place subframe, send descending random accessing message and gives the terminal on said protected subframe; Or,

The second transmitting element 802b is the corresponding sub-frame of uplink of the protected subframe of said base station if be used for said uplink random access message place subframe, on said protected subframe, sends descending random accessing message and gives the terminal; Or,

The 3rd transmitting element 802c is a private resource if be used for said uplink random access message place running time-frequency resource, on protected subframe, sends descending random accessing message and gives the terminal; Or,

The 4th transmitting element 802d is a dedicated preamble if be used for said uplink random access message, on protected subframe, sends descending random accessing message and gives the terminal.

Said private resource is the subclass of the RACH resource of said base station configuration, or the running time-frequency resource beyond the RACH resource of said base station configuration.

Said dedicated preamble is a preamble in the dedicated preamble group.

Referring to Figure 10, this base station also comprises:

Notification module 803 is used for said dedicated preamble is notified to said terminal.

Said sending module 802 is sending descending random accessing message to before the terminal on the protected subframe, be used for also confirming that said terminal is for receiving interfered with terminal.

It is preamble or scheduled transmission message that said uplink random inserts message.

Said protected subframe is corresponding to the intimate blank subframe of the infringement base station of said base station.

The base station that present embodiment provides, specifically can little base station etc., belonging to same design with method embodiment, its concrete implementation procedure sees method embodiment for details, repeats no more here.

Figure 11 is the structural representation at a kind of terminal of providing of the embodiment of the invention.Shown in figure 11, the terminal of present embodiment specifically can comprise: sending module 1101 and receiver module 1102,

Sending module 1101 is used for sending uplink random to the base station and inserts message;

Receiver module 1102 is used to receive the descending random accessing message that send said base station on protected subframe, and according to said descending random accessing message access base station.

Referring to Figure 12, said sending module 1101 comprises:

The first transmitting element 1101a is used on certain subframe, sending uplink random and inserts message, comprises protected subframe in one section time domain scope after said certain subframe; Or,

The second transmitting element 1101b is used on the corresponding sub-frame of uplink of the protected subframe of said base station, sending uplink random and inserts message; Or,

The 3rd transmitting element 1101c is used on private resource, sending uplink random to said base station and inserts message; Or,

The 4th transmitting element 1101d is used for sending dedicated preamble to said base station.

Referring to Figure 13, this terminal also comprises:

Judge module 1103 is used for confirming that said terminal is for receiving interfered with terminal.

The terminal that present embodiment provides belongs to same design with method embodiment, and its concrete implementation procedure sees method embodiment for details, repeats no more here.

Use protected subframe to send descending random accessing message through accepting the base station; Reached and be reduced in the purpose that the infringement base station down disturbs when inserting; Compared with prior art, the technical method of present embodiment can make the terminal in access contention and random access procedure at random, not receive the influence of descending interference; Improve the access success rate, improved communication performance.

Figure 14 is the structural representation at a kind of terminal of providing of the embodiment of the invention.Shown in figure 14, the terminal of present embodiment specifically can comprise: sending module 1401 and cell selecting module 1402,

Sending module 1401 is used for sending uplink random to the base station and inserts message;

Cell selecting module 1402 when not receiving feedback after being used in preset duration, not receiving the feedback of said base station or attempting preset times, is carried out district reselecting or cell selecting according to the actual RSRP of candidate base station, and is inserted the base station of selecting.

Referring to Figure 15, this terminal also comprises:

Judge module 1303 is used for confirming that said terminal is for receiving interfered with terminal.

Through the feedback use cell reselection criteria of terminal according to the base station; Insert so that search other base stations, reached and encroached on the purpose of base station when avoiding inserting, compared with prior art the descending interference of base station; The technical method of present embodiment; Can make the terminal in access contention and random access procedure at random, not receive the influence of descending interference, improve the access success rate, improve communication performance.

Figure 16 is the flow chart of a kind of reorientation method of providing of the embodiment of the invention.Shown in figure 16, the reorientation method of present embodiment specifically can may further comprise the steps:

1601: redirection information is sent to the terminal in the base station;

Wherein, redirection information is used to indicate this terminal to be redirected to the another one sub-district of current communication system from the Serving cell of current communication system.

Need to prove; This redirection information is included in RRC message (the RRC Connection Release that send the base station; Connection release message) in; Especially, this terminal can be carried out RRC connection release flow at the terminal and received base station RRC message, perhaps receives base station RRC message etc. when being transformed into idle state from connected state (connected state).

The reorientation method of present embodiment is redirected to other sub-districts through the base station indicating terminal, and compared with prior art, the technical method of present embodiment is avoided terminal (sub-district for example is injured) access in this sub-district, has improved the communication performance at terminal.

Figure 17 is the flow chart of a kind of reorientation method of providing of the embodiment of the invention.The mutual both sides of this embodiment are base station and terminal, and are shown in figure 17, and the reorientation method of present embodiment specifically can may further comprise the steps:

1701: whether the base station judges terminal is for receiving interfered with terminal, if then execution in step 1702;

Particularly, this receives interfered with terminal can be meant that this terminal receives strong jamming in current area, like the interfered with terminal that receives under the infringement sub-district.

Particularly; Whether this terminal of base station judges is the method that receives interfered with terminal; Can be to obtain or whether judge this terminal, especially, confirm that this terminal is to receive interfered with terminal thereby surpass certain thresholding through measurement result for receiving interfered with terminal through the terminal measurement and report.Those skilled in the art can know that the method for this judgement can also have other implementation, do not do concrete qualification in this present invention.

Need to prove; The deterministic process of base station is alternatively, and the base station is not judging that whether the terminal is to receive also can carry out step 401 under the situation of interfered with terminal, has increased this judgement; Can make the processing of base station more targeted, improve the access success rate that receives interfered with terminal.

1702: the base station is sent RRC message and is given this terminal, comprises redirection information (Redirection Information) in this RRC message;

This step 1702 specifically can for: when the base station judges terminal when connected state (connected state) is transformed into Idle state (idle state); The base station is sent RRC message and is given the terminal; Let the terminal carry out RRC and connect release, wherein, comprise redirection information in this RRC message.

Wherein, Redirection information is used for indicating terminal is redirected current system from the current area of current communication system (like the LTE system) another one sub-district; Particularly, it is resident in the another one sub-district of said current communication system that said redirection information is used to indicate said terminal; Or said redirection information be used to indicate said terminal with the another one sub-district of said current communication system as re-selecting cell.

This redirection information also is used to indicate this terminal to carry out district reselecting or cell selecting according to the actual RSRP of candidate base station, and inserts the base station of selecting.Particularly, this redirection information can also be indicated the side-play amount (bias) of this terminal disregards district reselecting, and as cell reselection criteria, the base station of selecting to meet terminal requirements is inserted with the actual RSRP of these other base stations.This moment, the side-play amount (bias) of district reselecting can be ignored in the terminal, with the actual RSRP of other base stations as cell reselection criteria, with the sub-district of base station indication as re-selecting cell.

In the present embodiment, said redirection information comprises: the said cell ID that is redirected to the another one sub-district of said current communication system; Or, the said Base Station Identification that is redirected to the another one sub-district of current communication system; Or, the said PCI that is redirected to the another one sub-district of current communication system.Particularly; This base station provides cell ID (like ECGI) or Base Station Identification (like eNB ID) or the corresponding PCI of the another one sub-district of this current communication system in redirection information, so that let resident this sub-district, terminal (for example low interfered cell is perhaps encroached on the sub-district); Avoid the terminal thus again when idle state is transformed into conneted state; Inserting at random is to insert rather than (sub-district for example is injured) access in this sub-district at this persistent district (for example low interfered cell is perhaps encroached on the sub-district), thus; Avoid terminal (sub-district for example is injured) access, improved the communication performance at terminal in this sub-district.

Need to prove that when this base station is the base station that is injured, the terminal was for to have the terminal of communicating by letter with the base station that is injured; When the terminal when connected state is transformed into Idle state; The terminal has been carried out RRC and has been connected release, and when this base station will be inserted once more in the terminal, it is low that meeting inserts success rate owing to the interference that receives infringement base station or infringement sub-district causes; In order to improve communication performance; The base station is through sending redirection information, and with another sub-district that indicating terminal is redirected to current communication system, this another sub-district is that an infringement sub-district or pairing base station, said resident sub-district are infringement base stations.

1703: the terminal receives the redirection information that send the base station;

This terminal can be carried out RRC connection release flow at the terminal and received base station RRC message, perhaps receives base station RRC message etc. when being transformed into idle state from connected state (connected state).

In the present embodiment, redirection information comprises: the said cell ID that is redirected to the another one sub-district of said current communication system; Or, the said Base Station Identification that is redirected to the another one sub-district of current communication system; Or, the said PCI that is redirected to the another one sub-district of current communication system.The terminal can be redirected according to the cell ID in this redirection information or Base Station Identification or sub-district PCI.

1704: the terminal resides in the another one sub-district of the current communication system of redirection information indication according to this redirection information.

Said redirection information is used to indicate said terminal resident in the another one sub-district of said current communication system; Or

Said redirection information be used to indicate said terminal with the another one sub-district of said current communication system as re-selecting cell.

1705: when the terminal when Idle state is transformed into connected state, the terminal is inserted in current resident sub-district at random.

Particularly, the another one sub-district from the Serving cell of current communication system is redirected to current communication system specifically comprises:

The another one sub-district of the current communication system that the terminal provides according to base station in the redirection information is inserted in the another one sub-district of said current communication system at random.

The reorientation method of present embodiment is redirected to other sub-districts through the terminal according to the base station indication, and inserts corresponding base station, sub-district; Compared with prior art; The technical method of present embodiment is avoided terminal (sub-district for example is injured) access in this sub-district, has improved the communication performance at terminal.

Figure 18 is the flow chart of a kind of reorientation method of providing of the embodiment of the invention.Shown in figure 18, the reorientation method of present embodiment specifically can may further comprise the steps:

1801: the terminal receives the redirection information that send the base station;

1802: the another one sub-district of said current communication system is redirected at said terminal from the Serving cell of current communication system according to said redirection information.

This embodiment is the end side embodiment of the corresponding embodiment of Figure 17, and the embodiment that its concrete implementation method and Figure 17 are corresponding is identical, repeats no more at this.

The sketch map of the another kind of base station that Figure 19 provides for the embodiment of the invention comprises:

Disturb determination module 1901, be used for confirming that said terminal is for receiving interfered with terminal;

Redirection module 1902 is used for sending redirection information to said terminal;

Said redirection information is used to indicate said terminal to be redirected to the another one sub-district of current communication system from the Serving cell of current communication system.

This base station also can comprise: state determination module 1903 is used to judge that said terminal is converted to Idle state from connected state, and starts said redirection module.

The sketch map at the another kind of terminal that Figure 20 provides for the embodiment of the invention comprises:

Receiver module 2001 is used to receive the redirection information that send the base station;

Redirection module 2002 is used for being redirected to from the Serving cell of current communication system according to said redirection information the another one sub-district of said current communication system.

This terminal also can comprise: first determination module 2003, be used for indication according to said redirection information, and carry out district reselecting or cell selecting according to the actual RSRP of candidate base station, to confirm said another one sub-district.When said redirection information comprises following any:

The cell ID of said another one sub-district;

The Base Station Identification of said another one sub-district;

The PCI of said another one sub-district;

Perhaps, said terminal also can further comprise: second determination module 2004 is used for the Base Station Identification of the cell ID according to said another one sub-district, said another one sub-district or the PCI of said another one sub-district and confirms said another one sub-district.

In order to solve the above-mentioned access problem that receives interfered with terminal, also have a solution:

Base station (as the base station that is injured) can be retransmitted repeatedly when sending the RACH response or when sending the RACH downstream message.When sending identical RACH response respectively on the protected subframe of normal sub-frames and ABS correspondence, the base station perhaps sends the RACH downstream message.Particularly, a RACH downstream message (replying message as inserting at random) can be sent out in normal sub-frames in the base station, on the corresponding protected subframe of ABS, sends out a said RACH downstream message then.

The all or part of of the technique scheme that the embodiment of the invention provides can be accomplished through the relevant hardware of program command; Said program can be stored in the storage medium that can read, and this storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.

The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. an accidental access method is characterized in that, comprising:

2. method according to claim 1 is characterized in that, said base station is sent descending random accessing message and comprised to the terminal on protected subframe:

Comprise protected subframe if said uplink random inserts in one section time domain scope after the subframe of message place, said base station is sent descending random accessing message and is given the terminal on said protected subframe; Or,

Subframe is the corresponding sub-frame of uplink of the protected subframe of said base station if said uplink random inserts the message place, and said base station is sent descending random accessing message and given the terminal on said protected subframe; Or,

Running time-frequency resource is a private resource if said uplink random inserts the message place, and said base station is sent descending random accessing message and given the terminal on protected subframe; Or,

If it is dedicated preamble that said uplink random inserts message, said base station is sent descending random accessing message and is given the terminal on protected subframe.

3. method according to claim 2 is characterized in that, said private resource is the subclass of the RACH resource of said base station configuration, or the running time-frequency resource beyond the RACH resource of said base station configuration.

4. method according to claim 2 is characterized in that, said dedicated preamble is a preamble in the dedicated preamble group.

5. method according to claim 2 is characterized in that, before the uplink random that the base station receiving terminal sends inserted message, said method also comprised:

The source serving BS at said base station or this terminal notifies said dedicated preamble to said terminal.

6. method according to claim 1 is characterized in that, it is preamble or scheduled transmission message that said uplink random inserts message.

7. according to each described method in the claim 1 to 6, it is characterized in that said protected subframe is corresponding to the intimate blank subframe of the infringement base station of said base station.

8. according to each described method in the claim 1 to 6, it is characterized in that sending descending random accessing message on the protected subframe to before the terminal in said base station, said method also comprises:

Confirm that said terminal is for receiving interfered with terminal.

9. an accidental access method is characterized in that, comprising:

The terminal is sent uplink random to the base station and is inserted message;

10. method according to claim 9 is characterized in that, said terminal is sent uplink random access message to the base station and comprised:

Said terminal is sent uplink random and is inserted message, and said uplink random inserts in one section time domain scope after the subframe of message place and comprises protected subframe; Or,

Said terminal is sent uplink random and is inserted message on the corresponding sub-frame of uplink of the protected subframe of said base station; Or,

Said terminal is sent uplink random to said base station and is inserted message on private resource; Or,

Dedicated preamble is sent to said base station in said terminal.

11., it is characterized in that before uplink random access message was sent in the base station, said method also comprised at said terminal according to claim 9 or 10 described methods:

Confirm that said terminal is for receiving interfered with terminal.

12. an accidental access method is characterized in that, comprising:

The terminal is sent uplink random to the base station and is inserted message;

13. method according to claim 12 is characterized in that, before uplink random access message was sent in the base station, said method also comprised at said terminal:

Confirm that said terminal is for receiving interfered with terminal.

14. a base station is characterized in that, comprising:

15. base station according to claim 14 is characterized in that, said sending module comprises:

First transmitting element if be used for comprising protected subframe in one section time domain scope after said uplink random inserts message place subframe, send descending random accessing message and gives the terminal on said protected subframe; Or,

Second transmitting element is the corresponding sub-frame of uplink of the protected subframe of said base station if be used for said uplink random access message place subframe, on said protected subframe, sends descending random accessing message and gives the terminal; Or,

The 3rd transmitting element is a private resource if be used for said uplink random access message place running time-frequency resource, on protected subframe, sends descending random accessing message and gives the terminal; Or,

The 4th transmitting element is a dedicated preamble if be used for said uplink random access message, on protected subframe, sends descending random accessing message and gives the terminal.

16. base station according to claim 15 is characterized in that, said base station also comprises:

Notification module is used for said dedicated preamble is notified to said terminal.

17., it is characterized in that said sending module is sending descending random accessing message to before the terminal on the protected subframe, be used for also confirming that said terminal is for receiving interfered with terminal according to claim 14 or 15 described base stations.

18. a terminal is characterized in that, comprising:

19. terminal according to claim 18 is characterized in that, said sending module comprises:

First transmitting element is used to send uplink random and inserts message, and said uplink random inserts in one section time domain scope after the subframe of message place and comprises protected subframe; Or,

Second transmitting element is used on the corresponding sub-frame of uplink of the protected subframe of said base station, sending uplink random and inserts message; Or,

The 3rd transmitting element is used on private resource, sending uplink random to said base station and inserts message; Or,

The 4th transmitting element is used for sending dedicated preamble to said base station.

20., it is characterized in that said terminal also comprises according to claim 18 or 19 described terminals:

Judge module is used for confirming that said terminal is for receiving interfered with terminal.

21. a terminal is characterized in that, comprising:

The cell selecting module when not receiving feedback after being used in preset duration, not receiving the feedback of said base station or attempting preset times, is carried out district reselecting or cell selecting according to the actual RSRP of candidate base station, and is inserted the base station of selecting.

22. terminal according to claim 21 is characterized in that, said terminal also comprises:

23. a reorientation method is characterized in that, comprising:

Redirection information is sent to the terminal in the base station;

24. method according to claim 23 is characterized in that, said base station also comprised before redirection information is sent at the terminal:

The said terminal of said base station judges is converted to Idle state from connected state.

25. method according to claim 23 is characterized in that, said base station also comprised before redirection information is sent at the terminal:

Said base station confirms that said terminal is for receiving interfered with terminal.

26., it is characterized in that said redirection information comprises according to each described method of claim 23-25:

The cell ID of said another one sub-district; Or,

The Base Station Identification of said another one sub-district; Or,

The PCI of said another one sub-district.

27., it is characterized in that said redirection information is used to indicate said terminal from the another one sub-district that the Serving cell of current communication system is redirected to current communication system, comprising according to each described method of claim 23-25:

Said redirection information is used to indicate said terminal resident in said another one sub-district; Or

Said redirection information be used to indicate said terminal with said another one sub-district as re-selecting cell.

28., it is characterized in that said redirection information also is used to indicate said terminal to carry out district reselecting or cell selecting according to the actual RSRP of candidate base station, to select said another one sub-district according to each described method of claim 23-25.

29. a reorientation method is characterized in that, comprising:

The terminal receives the redirection information that send the base station;

The another one sub-district of said current communication system is redirected at said terminal from the Serving cell of current communication system according to said redirection information.

30. method according to claim 29 is characterized in that, also comprises:

Said terminal is inserted in said another one sub-district at random.

31. according to claim 29 or 30 described methods, it is characterized in that,

Said redirection information comprises:

The cell ID of said another one sub-district; Or,

The Base Station Identification of said another one sub-district; Or,

The PCI of said another one sub-district;

Said method also comprises:

Said another one sub-district is confirmed according to the Base Station Identification of the cell ID of said another one sub-district, said another one sub-district or the PCI of said another one sub-district in said terminal.

32. according to claim 29 or 30 described methods, it is characterized in that, also comprise: said terminal is according to the indication of said redirection information, carries out district reselecting or cell selecting according to the actual RSRP of candidate base station, to confirm said another one sub-district.

33. a base station is characterized in that, comprising:

Disturb determination module, be used for confirming that said terminal is for receiving interfered with terminal;

Redirection module is used for sending redirection information to said terminal;

34. base station according to claim 33 is characterized in that, also comprises:

The state determination module is used to judge that said terminal is converted to Idle state from connected state, and starts said redirection module.

35. a terminal is characterized in that, comprising:

Receiver module is used to receive the redirection information that send the base station;

Redirection module is used for being redirected to from the Serving cell of current communication system according to said redirection information the another one sub-district of said current communication system.

36. terminal according to claim 35 is characterized in that, also comprises:

First determination module is used for the indication according to said redirection information, carries out district reselecting or cell selecting according to the actual RSRP of candidate base station, to confirm said another one sub-district.

37. terminal according to claim 35 is characterized in that, said redirection information comprises:

The cell ID of said another one sub-district; Or,

The Base Station Identification of said another one sub-district; Or,

The PCI of said another one sub-district;

Said terminal also comprises:

Second determination module is used for the Base Station Identification of the cell ID according to said another one sub-district, said another one sub-district or the PCI of said another one sub-district and confirms said another one sub-district.