CN101150825A - A method, system, base station and terminal for detecting interference neighbors - Google Patents
A method, system, base station and terminal for detecting interference neighbors Download PDFInfo
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Abstract
The invention provides a method for detecting interference to neighbors, an interference reported interval IRI comprising an upstream subframe and a downlink subframe is arranged in a frame structure. The method comprises: base stations allocate upstream interference report chances for terminals which do not enter into the network in self IRI upstream subframes, and the self IRI downlink subframes send the allocated upstream interference report chances to the terminals; the terminals detect the information of interfering base stations, when the terminals acquire upstream interference report chances, the acquired upstream interference report chances send the detected information of interfering base stations to base stations; the base stations judge unknown interfering neighbors whether or not exist in the base stations according to the received information of interfering base stations from the terminals. The invention also provides a system, base stations and terminals for detecting interfereing neighbors. The invention can detect hidden nodes, eliminates a communication blind area problem which is caused by the existence of hidden nodes.
Description
Technical field
The present invention relates to wireless communication technology, relate in particular to a kind of method and system and a kind of base station and a kind of terminal that detects interference neighbors.
Background technology
Wireless frequency spectrum is divided into authorizes frequency range and unauthorized frequency range, authorizing frequency range is the wireless transmission band of opening up for a certain radio communication service specially, other radio communication service can not be in this band transmissions, authorize frequency range generally to distribute to a certain operator, operator can be optimized the frequency range that each node adopted in the system, to reduce the phase mutual interference between the node.Unauthorized frequency range then can fixed allocation not given a certain operator, all radio communication services that meet certain requirements all can be opened and use this frequency range freely, because the frequency that each node adopts is unfixing, also neither one operator carries out the optimization of network, therefore, wireless device in unauthorized frequency range need have Interference Detection and evade function, to realize better coexistence.
For the coexistence in the BWA that realizes unauthorized frequency range, the use authority frequency range have an intrasystem coexistence of cognitive radio function, and the coexistence of unauthorized frequency range and mandate frequency range system, IEEE 802 local area network (LAN)s/metropolitan area network (LAN/MAN) standard committee has set up a series of working group and has formulated relevant cognition wireless electric standard, comprises 802.11y, 802.16h, 802.22 etc.Cognitive radio technology is meant system dynamics perception surrounding environment, and dynamically adjusts its internal state effectively to utilize idle frequency spectrum according to the environmental change self adaptation, avoids the interference to other system simultaneously.Cognitive radio technology can effectively utilize idle frequency spectrum under the prerequisite of not disturbing authorized user, improve the availability of frequency spectrum greatly.Wherein, described system comprises base station (BS, Base Station) and the terminal that is associated with it (SS, SubscriberStation).
Avoid interference, all frequency spectrum operating positions around the at first necessary perception that can be correct to other system.Usually, certain frequency spectrum sensing method will be adopted in the base station before connecting system, and whether detect has other base station to take this frequency range, comprised the base station of oneself but the base station can only perceive coverage, did not comprise the base station of oneself and can not perceive coverage.Such as, referring to shown in Figure 1, supposing that BS1 adopts frequency f 1, BS2 adopts frequency f 2, then can to detect f1 shared by BS1 for BS0, and think that f2 is idle, like this, if BS0 also adopts f2 to send, so, the terminal that is positioned at BS0 and the common coverage of BS2 will be born co-channel interference.
In order to address the above problem, the method of the auxiliary Interference Detection of a kind of terminal has been proposed in the prior art, specifically referring to shown in Figure 2, suppose to have terminal SS0 in the common overlay area of BS0 and BS2, SS0 is linked into BS2, when BS0 initially inserts, BS0 can broadcast the information of self, after SS0 in the BS0 coverage detects broadcast from BS0, the broadcast of detected BS0 is passed to oneself serving BS BS2, and the signal that BS2 reports according to terminal SS0 knows and oneself has interference neighbors BS0, afterwards, BS2 notifies BS0 by backbone network, and this frequency is occupied.That is to say that BS0 can find that frequency f 2 is occupied by terminal SS0 in self overlay area, that existed.
Wherein, there is another system of neighborhood to be called the neighbours of this system with a system.Neighborhood is two relations between the system, is meant that specifically at least one BS in two systems is higher than certain threshold to the interference of at least one SS of another system; Perhaps, at least one SS of at least one system in two systems to the interference of the BS of another system greater than certain threshold.A certain system produced disturb or be subjected to all other systems of this system interference to be called the interference adjacent area of this system.
The scheme of the auxiliary Interference Detection of above-mentioned terminal needs to do between BS0 and the BS2 necessary coordination, and BS0 is when sending out broadcast, and BS2 must stop to send; Otherwise if BS0 and BS2 send simultaneously, so, because the phase mutual interference, SS0 can't receive any one signal.Wherein, coordination mode between a kind of BS is to utilize gps clock to coordinate, referring to shown in Figure 3, with 802.16h is example, having a frame to be available per 6 seconds does not carry out exporting, this frame that is available is called compossibility message interval (CMI, Coexistence Messaging Interval), suppose that first CMI (CMI_ID_00) starts from HH:MM:00 UTC, second CMI (CMI_ID_06) starts from HH:MM:06, the 10th CMI (CMI_ID_54) starts from HH:MM:54 UTC, and 10 CMI were then just arranged in one minute.Wherein, last CMI i.e. the 10th CMI, and all intrasystem base stations and terminal are not carried out any transmission; Remaining 9 CMI distribute to different base stations respectively, suppose that CMI_ID_00 distributes to BS0, this frame that begins at HH:MM:00 then, and all base stations and terminal except that BS0 and BS0 subordinate terminal all do not send, and only receive.Which CMI emission each base station adopts coordinate through backbone network, to guarantee at any one CMI a having only base station and its subordinate terminal to send.The CMI frame comprises descending and up two parts, descender is used for base station broadcast self information (BSD, Base Station Descriptor), BSD information comprises base station IDs, base station equivalent isotropically radiated power EIRP, base station radio-frequency antenna sector ID, base station or its agency's IP address etc.; Ascender is used for terminal transmission Termination ID, base station IDs, base station EIRP, base station radio-frequency antenna sector ID, base station or its agency's IP address etc.
For ease of describing, the BS that will initially insert is designated as IBS below.When IBS initially inserts, at first can receive the terminal signaling of CMI frame, if detect terminal signaling at certain CMI frame, and can correct decoding, IBS thinks that then base station that this terminal launches is self neighbours base station, two base stations may the phase mutual interference.Simultaneously, IBS can select idle CMI transmission self broadcast, this message comprises IP address, base station and base station MAC address, the terminal of other neighbours base station has been found new IBS to the serving BS report of oneself after receiving this broadcast, and information such as the IP address of new IBS and MAC Address are sent to serving BS, serving BS communicates by backbone network and IBS, thereby sets up neighborhood with IBS according to the IBS IP address of receiving.
Coordination mode between the another kind of BS periodically is used for the base station at interval in a frame reservation part and communicates by letter with its interference neighbors referring to shown in Figure 4, and reserve the part of coming out and be called compossibility slot time (CSI, Coexistence Slot Interval), wherein, T
CSIduraBe CSI length (millisecond), T
CSIstartBe the zero-time of CSI at a distance of frame head, N
CSIstartBe CSI initial frame number, N
CSIintvBe two frame numbers between the CSI.CSI is divided into ICSI and OCSI, and ICSI is used for BS and is initially entering the interference relationships of stage foundation with neighbours BS, and OCSI is used for entering the BS and the foundation of the interference relationships between the neighbours BS of network.At an OCSI in the cycle, each BS that has entered in the interference adjacent area of network selects the main OCSI of an OCSI as oneself, only declares that the BS that has this main OCSI just can launch, and other BS does not launch.
As seen, the prerequisite of the auxiliary Interference Detection of existing terminal is: initially insert at IBS, when selecting operating frequency, in the common coverage of this IBS and neighbours BS terminal existence activation, that be associated with neighbours BS is arranged.But under a lot of situations, when IBS initially inserted, the common area of coverage of IBS and neighbours BS did not have such terminal and exists, and at this moment, IBS just may select a frequency identical with neighbours BS.Such as referring to shown in Figure 5, owing to there not be the terminal of activation in the common coverage between BS0 and the BS2, BS0 detects less than BS2, and then BS0 just may select the frequency identical with BS2 to transmit.Like this, after the SS1 start that is in the two common area of coverage, because the mutual interference mutually of BS0 and BS2, SS1 can't access network, thereby forms communication blind district.This mutual existence is disturbed but is not detected the situation of interference for a certain reason, is referred to as latent node, and BS2 among Fig. 5 and BS0 be the other side's latent node each other.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and system that detect interference neighbors, realizes the detection of latent node.Another object of the present invention is to provide a kind of base station and a kind of terminal, assist the realization of latent node detection.
For achieving the above object, the method for detection interference neighbors provided by the invention is as follows:
The interference that comprises sub-frame of uplink and descending sub frame is set in frame structure reports IRI at interval, the base station for not entering the terminal distribution upstream interference report chance of network as yet, and sends to terminal by self IRI descending sub frame with the upstream interference report chance of distributing in self IRI sub-frame of uplink; Terminal detects interference base station information, and after obtaining the upstream interference report chance, by the upstream interference report chance of obtaining detected interference base station information is sent to the base station; The base station judges whether to exist the unknown disturbances neighbours according to the interference base station information of receiving of coming self terminal.
Wherein, the described IRI of setting comprises: according to the rule that compossibility message interval CMI is set IRI is set; Perhaps, according to the rule that compossibility slot time CSI is set IRI is set.
Described base station is that terminal distribution upstream interference report chance comprises: the base station is the terminal distribution upstream interference report chance that does not enter network as yet by initial access connection identifiers CID.
Described base station is that terminal distribution upstream interference report chance comprises: the base station in the ascending resource in self IRI sub-frame of uplink at random mode for not entering the terminal distribution upstream interference report chance of network as yet.
Described base station is that terminal distribution upstream interference report chance comprises: the base station in self IRI sub-frame of uplink for not entering the more than one upstream interference report chance of terminal distribution of network as yet;
Described terminal sends to the base station by the upstream interference report chance with interference base station information and comprises: terminal is upstream interference report chance of picked at random from the more than one upstream interference report chance of obtaining, and by the upstream interference report chance of choosing detected interference base station information is sent to the base station.
Described base station sends to terminal by self IRI descending sub frame with the upstream interference report chance of distributing and comprises: the base station sends to terminal at the frame head of IRI descending sub frame with the upstream interference report chance of distributing;
Perhaps, the base station selects a moment of enough transmitting this upstream interference report chance that this upstream interference report chance is sent to terminal in the IRI descending sub frame at random.
This method further comprises: the base station is by self IRI descending sub frame downlink broadcast transmission self information BSD.
Described terminal detects interference base station information and comprises: terminal is at IRI frame and/or CMI frame and/or CSI frame and/or normal frame base stations detected interfere information, and preserves the detected interference base station information of each channel.
Described terminal sends to the base station by the upstream interference report chance with interference base station information and comprises: terminal sends detected interference base station information by the upstream interference report chance of obtaining, the modulation coding mode of employing system minimum speed limit that supported, essential to the base station.
This method further comprises: the base station sends to terminal by self IRI descending sub frame with the modulation coding mode that terminal will adopt;
Described terminal sends to the base station by the upstream interference report chance with interference base station information and comprises: terminal sends detected interference base station information by the upstream interference report chance of obtaining, the modulation coding mode that adopts the base station to send to the base station.
Described base station further comprises after having the unknown disturbances neighbours judging: base station and this unknown disturbances neighbours consult, and disturb and evade.
Described interference further comprises after evading: the terminal of access network does not select a base station to insert according to signal quality as yet.
Described interference base station information comprises: base station IDs, base station or its agency's IP address, base station equivalent isotropically radiated power EIRP, base station radio-frequency antenna sector ID, wherein, base station EIRP and base station radio-frequency antenna sector ID are optional information.
Corresponding method provided by the present invention, the present invention also provides a kind of system that detects interference neighbors, and this system comprises: base station and terminal, wherein,
The base station, be used for comprising that frame structure setting the interference of sub-frame of uplink and descending sub frame reports IRI at interval, in self IRI sub-frame of uplink for not entering the terminal distribution upstream interference report chance of network as yet, by self IRI descending sub frame the upstream interference report chance of distributing is sent to terminal, and be used to receive the interference base station information of self terminal, judge whether to exist the unknown disturbances neighbours according to the interference base station information of receiving;
Terminal is used to detect interference base station information, and is used to receive the upstream interference report chance from the base station, after obtaining the upstream interference report chance, by the upstream interference report chance of obtaining detected interference base station information is sent to the base station.
Wherein, described base station comprises: unit, allocation units, detecting unit and Transmit-Receive Unit are set,
The unit is set, is used for comprising the IRI of sub-frame of uplink and descending sub frame, and the IRI information that is provided with is sent to allocation units and Transmit-Receive Unit frame structure setting;
Allocation units are used to receive the IRI information from the unit is set, and are the terminal distribution upstream interference report chance that does not enter network as yet in the IRI sub-frame of uplink, and the upstream interference report opportunity information of distributing is sent to Transmit-Receive Unit;
Transmit-Receive Unit, be used to receive from the IRI information that the unit is set and from the upstream interference report opportunity information of allocation units, by the IRI descending sub frame upstream interference report chance of distributing is sent to terminal, and be used to receive the interference base station information of self terminal, the interference base station information of receiving is sent to detecting unit;
Detecting unit is used to receive the interference base station information from Transmit-Receive Unit, and judges whether to exist the unknown disturbances neighbours according to the interference base station information of receiving.
Described base station further comprises: negotiation element, wherein,
Described detecting unit, be further used for judge have the unknown disturbances neighbours after, this unknown disturbances neighbor information is sent to negotiation element;
Negotiation element is used to receive the unknown disturbances neighbor information from detecting unit, and is used for consulting with this unknown disturbances neighbours, disturbs and evades.
Described terminal comprises: detecting unit and Transmit-Receive Unit, wherein,
Detecting unit is used to detect interference base station information, and detected interference base station information is sent to Transmit-Receive Unit;
Transmit-Receive Unit is used to receive from the interference base station information of detecting unit and from the upstream interference report chance of base station, and after obtaining the upstream interference report chance, by the upstream interference report chance of obtaining the interference base station information of receiving is sent to the base station.
In addition, the present invention also provides a kind of base station, and this base station comprises: unit, allocation units, detecting unit and Transmit-Receive Unit are set, wherein,
The unit is set, is used for comprising that frame structure setting the interference of sub-frame of uplink and descending sub frame reports IRI at interval, and the IRI information that is provided with is sent to allocation units and Transmit-Receive Unit;
Allocation units are used to receive the IRI information from the unit is set, and are the terminal distribution upstream interference report chance that does not enter network as yet in the IRI sub-frame of uplink, and the upstream interference report opportunity information of distributing is sent to Transmit-Receive Unit;
Transmit-Receive Unit, be used to receive from the IRI information that the unit is set and from the upstream interference report opportunity information of allocation units, by the IRI descending sub frame upstream interference report chance of distributing is sent to terminal, and be used to receive the interference base station information of self terminal, the interference base station information of receiving is sent to detecting unit;
Detecting unit is used to receive the interference base station information from Transmit-Receive Unit, and judges whether to exist the unknown disturbances neighbours according to the interference base station information of receiving.
This base station further comprises: negotiation element, wherein,
Described detecting unit, be further used for judge have the unknown disturbances neighbours after, this unknown disturbances neighbor information is sent to negotiation element;
Negotiation element is used to receive the unknown disturbances neighbor information from detecting unit, and is used for consulting with this unknown disturbances neighbours, disturbs and evades.
The present invention also provides a kind of terminal, and this terminal comprises: detecting unit and Transmit-Receive Unit, wherein,
Detecting unit is used to detect interference base station information, and detected interference base station information is sent to Transmit-Receive Unit;
Transmit-Receive Unit is used to receive from the interference base station information of detecting unit and from the upstream interference report chance of base station, and after obtaining the upstream interference report chance, by the upstream interference report chance of obtaining the interference base station information of receiving is sent to the base station.
This shows, the present invention reports IRI at interval by being provided with to disturb in frame structure, and in IRI the terminal distribution upstream interference report chance of access network not as yet, make that access network, that be not in the communication blind district as yet terminal can report self detected interference base station information to the base station, whether the base station can exist unknown interference neighbors according to the interference base station INFORMATION DISCOVERY of terminal to report, thereby realized the detection of latent node, eliminated the communication blind district problem that causes owing to the existence that conceals node.
Description of drawings
Fig. 1 is a base station frequency spectrum perception scope schematic diagram.
Fig. 2 is the auxiliary Interference Detection schematic diagram of terminal.
Fig. 3 is the CMI structural representation.
Fig. 4 is the CSI structural representation.
Fig. 5 is the communication blind district schematic diagram.
Fig. 6 is the IRI structural representation in the embodiment of the invention.
Fig. 7 is the detection interference neighbors system configuration schematic diagram among the present invention.
Fig. 8 is the detection interference neighbors system configuration schematic diagram in the embodiment of the invention.
Fig. 9 is the architecture of base station schematic diagram in the embodiment of the invention.
Figure 10 is the method flow diagram that detects interference neighbors in the embodiment of the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, the embodiment that develops simultaneously with reference to the accompanying drawings is described in further detail the present invention.
The basic thought of detection interference neighbors method provided by the invention is: the interference that comprises sub-frame of uplink and descending sub frame is set in frame structure reports IRI at interval, the base station for not entering the terminal distribution upstream interference report chance of network as yet, and sends to terminal by self IRI descending sub frame with the upstream interference report chance of distributing in self IRI sub-frame of uplink; Terminal detects interference base station information, and after obtaining the upstream interference report chance, by the upstream interference report chance of obtaining detected interference base station information is sent to the base station; The base station judges whether to exist the unknown disturbances neighbours according to the interference base station information of receiving of coming self terminal.
Wherein, IRI is the interval of base station every some frames reservations, and IRI both can be a whole frame, also can be the part of a whole frame.If IRI is a whole frame, then can remove to be provided with IRI according to the rule that CMI is set; If IRI is the part of a whole frame, then can remove to be provided with IRI according to the rule that CSI is set.Such as, when IRI is set, adopt frame identical and the frame period identical with CMI with CMI; Perhaps, adopt frame identical and the frame period identical with CSI with CSI.
IRI shown in Figure 6 is the part of a whole frame, wherein, and T
IRIduraBe IRI length, T
IRIstartBe the zero-time of IRI at a distance of frame head, N
IRIstartBe IRI initial frame number, N
IRIintvBe two frame numbers between the IRI.Need to prove that IRI both can be positioned at before the base station down emission, after the up emission, also can be positioned at after the base station down emission, before the up emission.
In addition, can also set every N
IRIIndividual IRI forms an IRI cycle, and to the IRI number consecutively of an IRI in the cycle, such as be IRI_1, IRI_2 ..., IRI_N, wherein, N=N
IRIBe arranged in each base station of disturbing the adjacent area and select the main IRI of an IRI as self, different base station selected different IRI from an IRI cycle respectively through consultation.For certain IRI, only declare that the base station that has this IRI just can receive and dispatch, base station that other are all and terminal all can not send.
The IRI frame is divided into IRI sub-frame of uplink and IRI descending sub frame two parts, the base station is by self IRI descending sub frame downlink broadcast transmission self information BSD, and be the terminal distribution upstream interference report chance of access network not as yet, the upstream interference report chance that the base station is distributed is limited in the current IRI sub-frame of uplink, the terminal of access network cannot utilize this to report chance to transmit, and has only as yet not the terminal of access network just can utilize this to report chance to transmit.The base station can utilize broadcasting connection identifier (CID, Connection Identity) sends BSD, utilize the initial CID of access to distribute the upstream interference report chance, wherein, BSD information comprises base station IDs, base station EIRP, base station radio-frequency antenna sector ID, base station or its agency's IP address etc.
The base station is a terminal distribution upstream interference report chance, is exactly in fact to be the terminal distribution ascending resource.The base station is when being terminal distribution upstream interference report chance, the modulation coding mode that can also specify terminal to adopt, that is to say that the modulation coding mode that will adopt during with the terminal uplink sends to terminal, terminal adopts the given modulation coding mode in base station to carry out up transmission; If the base station does not provide the modulation coding mode that terminal adopts, then terminal will adopt the modulation coding mode of that system supports, essential minimum speed limit to carry out up transmission.
Corresponding with the method for above-mentioned detection interference neighbors, the present invention also provides a kind of system that detects interference neighbors, referring to shown in Figure 7, this system comprises: base station and terminal, wherein, the base station is used for comprising that frame structure setting the interference of sub-frame of uplink and descending sub frame reports IRI at interval, in self IRI sub-frame of uplink for not entering the terminal distribution upstream interference report chance of network as yet, by self IRI descending sub frame the upstream interference report chance of distributing is sent to terminal, and be used to receive the interference base station information of self terminal, judge whether to exist the unknown disturbances neighbours according to the interference base station information of receiving; Terminal is used to detect interference base station information, and is used to receive the upstream interference report chance from the base station, after obtaining the upstream interference report chance, by the upstream interference report chance of obtaining detected interference base station information is sent to the base station.
Referring to shown in Figure 8, base station among Fig. 7 can comprise: unit, allocation units, detecting unit and Transmit-Receive Unit are set, wherein, the IRI that the unit is used for comprising frame structure setting sub-frame of uplink and descending sub frame is set, and the IRI information that is provided with is sent to allocation units and Transmit-Receive Unit; Allocation units are used to receive the IRI information from the unit is set, and are the terminal distribution upstream interference report chance that does not enter network as yet in the IRI sub-frame of uplink, and the upstream interference report opportunity information of distributing is sent to Transmit-Receive Unit; Transmit-Receive Unit is used to receive from the IRI information that the unit is set and from the upstream interference report opportunity information of allocation units, by the IRI descending sub frame upstream interference report chance of distributing is sent to terminal, and be used to receive the interference base station information of self terminal, the interference base station information of receiving is sent to detecting unit; Detecting unit is used to receive the interference base station information from Transmit-Receive Unit, and judges whether to exist the unknown disturbances neighbours according to the interference base station information of receiving.
Referring to shown in Figure 8, the terminal among Fig. 7 can comprise: detecting unit and Transmit-Receive Unit, and wherein, detecting unit is used to detect interference base station information, and detected interference base station information is sent to Transmit-Receive Unit; Transmit-Receive Unit is used to receive from the interference base station information of detecting unit and from the upstream interference report chance of base station, and after obtaining the upstream interference report chance, by the upstream interference report chance of obtaining the interference base station information of receiving is sent to the base station.
Referring to shown in Figure 9, the base station among Fig. 8 also can further comprise: negotiation element, wherein, detecting unit be further used for judge have the unknown disturbances neighbours after, this unknown disturbances neighbor information is sent to negotiation element; Negotiation element is used to receive the unknown disturbances neighbor information from detecting unit, and is used for consulting with this unknown disturbances neighbours, disturbs and evades.
The present invention also provides a kind of base station and a kind of terminal, and the concrete structure of this base station and terminal is consistent with base station and terminal among Fig. 8 respectively, repeats no more here.
Set about from the processing procedure of base station below, and in conjunction with system provided by the present invention, interference neighbors detection method provided by the invention is elaborated, referring to shown in Figure 10, present embodiment mainly may further comprise the steps:
Step 1001: the base station judges whether the IRI frame of self arrives, if arrive, then execution in step 1002; Otherwise execution in step 1006 is promptly carried out normal transmitting-receiving flow process, and the processing of process ends.
Step 1002: it is the upstream interference report chance of terminal distribution that the base station sends the base station by self IRI descending sub frame to terminal.
Wherein, the base station can send down the upstream interference report chance at the frame head of IRI descending sub frame, also can in the IRI descending sub frame, select enough moment transmission of this upstream interference report chance of transmission at random, to reduce the collision probability of downstream signal between the different system base station.
In addition, the base station also can send to terminal with self information BSD in self IRI descending sub frame.The process that sends downstream signal is specifically finished by the Transmit-Receive Unit of base station.
For ease of the description of follow-up flow process, at first set forth the processing procedure of end side below.
As yet not the terminal of access network when attempting access network, can start interference check function, that is to say, the downstream signal of base stations detected, if terminal detects interference base station information at IRI frame and/or CMI frame and/or CSI frame and/or normal frame, then be kept at the detected interference base station information of each channel.In addition, terminal also can be safeguarded detected interference base station information, that is to say, if terminal detects new interference base station with certain reliability, then preserves and should newly disturb base station information; If terminal detects less than the pairing interference base station of having preserved of interference base station information with certain reliability, then delete this interference base station information.
Interference base station information comprises base station IDs, base station EIRP, base station radio-frequency antenna sector ID, base station or its agency's IP address etc., and wherein, base station EIRP and base station radio-frequency antenna sector ID are optional information.In addition, terminal might detect interference base station information at a more than IRI frame and/or CMI frame and/or CSI frame and/or normal frame.
The process of base stations detected interfere information is specifically finished by the detecting unit of terminal.
Described terminal detects interference base station information in normal frame and is meant, if the terminal of access network can not receive the downstream signal of certain base station brokenly in normal frame as yet, and can't be linked into this base station, then terminal thinks that this base station is an interference base station, and preserves the information of this base station.
As yet not the terminal of access network after detecting the downstream signal of base station, decode, if the upstream interference report chance of having found base station assigns then utilizes this to report chance to send the Interference Detection report to the base station, this Interference Detection report comprises the recent detected interference base station information of terminal.In addition, terminal also can be at carried terminal ID in the Interference Detection report.If the base station has provided the modulation coding mode that terminal adopted, then terminal adopts the given modulation coding mode in base station to send the Interference Detection report; If the base station does not provide the modulation coding mode that terminal adopts, then terminal adopts the modulation coding mode of minimum speed limit that system supported, essential to send the Interference Detection report.This reports process specifically to be finished by the Transmit-Receive Unit of terminal.
In addition, for fear of the collision of upward signal, the base station can be in ascending resource is terminal distribution upstream interference report chance at random mode; Perhaps, the base station is the upstream interference report chance of a plurality of competitions of terminal distribution, and terminal selects one of them upstream interference report chance to carry out up transmission at random.
Step 1003: the Interference Detection report of whether receiving self terminal at self IRI sub-frame of uplink is judged in the base station, if receive, then execution in step 1004; Otherwise, return execution in step 1001.
Step 1004: the base station judges whether to exist the unknown disturbances neighbours according to the Interference Detection report of receiving, that is to say, judges in the Interference Detection report whether have the new interference neighbors different with self known interference neighbors, if exist, then execution in step 1005; Otherwise, return execution in step 1001.
Step 1005: the base station is sent the request of finding new interference neighbors according to the Interference Detection report of receiving to this unknown disturbances neighbours, consults with this unknown disturbances neighbours, disturbs and evades, and then, returns execution in step 1001.
The method that interference is evaded can be reselect other channel or two BS between share same channel by timesharing.The process that interference is evaded is specifically finished by the negotiation element of base station.
After interference was evaded, the terminal of access network can not select a BS to insert according to signal quality as yet.
As seen, the present invention can detection of dynamic go out latent node, thereby can eliminate the communication blind district problem that causes owing to the existence that conceals node, and the terminal that is arranged in the blind area also can access network.
The above has carried out further detailed description to purpose of the present invention, technical scheme and beneficial effect; institute is understood that; the above is not in order to restriction the present invention; within the spirit and principles in the present invention all; any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (20)
1. a method that detects interference neighbors is characterized in that, the interference that comprises sub-frame of uplink and descending sub frame is set in frame structure reports IRI at interval, and this method comprises:
The base station for not entering the terminal distribution upstream interference report chance of network as yet, and sends to terminal by self IRI descending sub frame with the upstream interference report chance of distributing in self IRI sub-frame of uplink; Terminal detects interference base station information, and after obtaining the upstream interference report chance, by the upstream interference report chance of obtaining detected interference base station information is sent to the base station; The base station judges whether to exist the unknown disturbances neighbours according to the interference base station information of receiving of coming self terminal.
2. method according to claim 1 is characterized in that, the described IRI of setting comprises:
According to the rule that compossibility message interval CMI is set IRI is set;
Perhaps, according to the rule that compossibility slot time CSI is set IRI is set.
3. method according to claim 1 is characterized in that, described base station is that terminal distribution upstream interference report chance comprises: the base station is the terminal distribution upstream interference report chance that does not enter network as yet by initial access connection identifiers CID.
4. method according to claim 1, it is characterized in that described base station is that terminal distribution upstream interference report chance comprises: the base station in the ascending resource in self IRI sub-frame of uplink at random mode for not entering the terminal distribution upstream interference report chance of network as yet.
5. method according to claim 1 is characterized in that, described base station is that terminal distribution upstream interference report chance comprises: the base station in self IRI sub-frame of uplink for not entering the more than one upstream interference report chance of terminal distribution of network as yet;
Described terminal sends to the base station by the upstream interference report chance with interference base station information and comprises: terminal is upstream interference report chance of picked at random from the more than one upstream interference report chance of obtaining, and by the upstream interference report chance of choosing detected interference base station information is sent to the base station.
6. method according to claim 1, it is characterized in that described base station sends to terminal by self IRI descending sub frame with the upstream interference report chance of distributing and comprises: the base station sends to terminal at the frame head of IRI descending sub frame with the upstream interference report chance of distributing;
Perhaps, the base station selects a moment of enough transmitting this upstream interference report chance that this upstream interference report chance is sent to terminal in the IRI descending sub frame at random.
7. method according to claim 1 is characterized in that, this method further comprises: the base station is by self IRI descending sub frame downlink broadcast transmission self information BSD.
8. according to claim 1 or 7 described methods, it is characterized in that, described terminal detects interference base station information and comprises: terminal is at IRI frame and/or CMI frame and/or CSI frame and/or normal frame base stations detected interfere information, and preserves the detected interference base station information of each channel.
9. method according to claim 1, it is characterized in that described terminal sends to the base station by the upstream interference report chance with interference base station information and comprises: terminal sends detected interference base station information by the upstream interference report chance of obtaining, the modulation coding mode of employing system minimum speed limit that supported, essential to the base station.
10. method according to claim 1 is characterized in that, this method further comprises: the base station sends to terminal by self IRI descending sub frame with the modulation coding mode that terminal will adopt;
Described terminal sends to the base station by the upstream interference report chance with interference base station information and comprises: terminal sends detected interference base station information by the upstream interference report chance of obtaining, the modulation coding mode that adopts the base station to send to the base station.
11. method according to claim 1 is characterized in that, described base station further comprises after having the unknown disturbances neighbours judging: base station and this unknown disturbances neighbours consult, and disturb and evade.
12. method according to claim 11 is characterized in that, described interference further comprises after evading: the terminal of access network does not select a base station to insert according to signal quality as yet.
13. method according to claim 1, it is characterized in that, described interference base station information comprises: base station IDs, base station or its agency's IP address, base station equivalent isotropically radiated power EIRP, base station radio-frequency antenna sector ID, wherein, base station EIRP and base station radio-frequency antenna sector ID are optional information.
14. a system that detects interference neighbors is characterized in that, this system comprises: base station and terminal, wherein,
The base station, be used for comprising that frame structure setting the interference of sub-frame of uplink and descending sub frame reports IRI at interval, in self IRI sub-frame of uplink for not entering the terminal distribution upstream interference report chance of network as yet, by self IRI descending sub frame the upstream interference report chance of distributing is sent to terminal, and be used to receive the interference base station information of self terminal, judge whether to exist the unknown disturbances neighbours according to the interference base station information of receiving;
Terminal is used to detect interference base station information, and is used to receive the upstream interference report chance from the base station, after obtaining the upstream interference report chance, by the upstream interference report chance of obtaining detected interference base station information is sent to the base station.
15. system according to claim 14 is characterized in that, described base station comprises: unit, allocation units, detecting unit and Transmit-Receive Unit are set, wherein,
The unit is set, is used for comprising the IRI of sub-frame of uplink and descending sub frame, and the IRI information that is provided with is sent to allocation units and Transmit-Receive Unit frame structure setting;
Allocation units are used to receive the IRI information from the unit is set, and are the terminal distribution upstream interference report chance that does not enter network as yet in the IRI sub-frame of uplink, and the upstream interference report opportunity information of distributing is sent to Transmit-Receive Unit;
Transmit-Receive Unit, be used to receive from the IRI information that the unit is set and from the upstream interference report opportunity information of allocation units, by the IRI descending sub frame upstream interference report chance of distributing is sent to terminal, and be used to receive the interference base station information of self terminal, the interference base station information of receiving is sent to detecting unit;
Detecting unit is used to receive the interference base station information from Transmit-Receive Unit, and judges whether to exist the unknown disturbances neighbours according to the interference base station information of receiving.
16. system according to claim 15 is characterized in that, described base station further comprises: negotiation element, wherein,
Described detecting unit, be further used for judge have the unknown disturbances neighbours after, this unknown disturbances neighbor information is sent to negotiation element;
Negotiation element is used to receive the unknown disturbances neighbor information from detecting unit, and is used for consulting with this unknown disturbances neighbours, disturbs and evades.
17., it is characterized in that described terminal comprises according to claim 14,15 or 16 described systems: detecting unit and Transmit-Receive Unit, wherein,
Detecting unit is used to detect interference base station information, and detected interference base station information is sent to Transmit-Receive Unit;
Transmit-Receive Unit is used to receive from the interference base station information of detecting unit and from the upstream interference report chance of base station, and after obtaining the upstream interference report chance, by the upstream interference report chance of obtaining the interference base station information of receiving is sent to the base station.
18. a base station is characterized in that, this base station comprises: unit, allocation units, detecting unit and Transmit-Receive Unit are set, wherein,
The unit is set, is used for comprising that frame structure setting the interference of sub-frame of uplink and descending sub frame reports IRI at interval, and the IRI information that is provided with is sent to allocation units and Transmit-Receive Unit;
Allocation units are used to receive the IRI information from the unit is set, and are the terminal distribution upstream interference report chance that does not enter network as yet in the IRI sub-frame of uplink, and the upstream interference report opportunity information of distributing is sent to Transmit-Receive Unit;
Transmit-Receive Unit, be used to receive from the IRI information that the unit is set and from the upstream interference report opportunity information of allocation units, by the IRI descending sub frame upstream interference report chance of distributing is sent to terminal, and be used to receive the interference base station information of self terminal, the interference base station information of receiving is sent to detecting unit;
Detecting unit is used to receive the interference base station information from Transmit-Receive Unit, and judges whether to exist the unknown disturbances neighbours according to the interference base station information of receiving.
19. base station according to claim 18 is characterized in that, this base station further comprises: negotiation element, wherein,
Described detecting unit, be further used for judge have the unknown disturbances neighbours after, this unknown disturbances neighbor information is sent to negotiation element;
Negotiation element is used to receive the unknown disturbances neighbor information from detecting unit, and is used for consulting with this unknown disturbances neighbours, disturbs and evades.
20. a terminal is characterized in that, this terminal comprises: detecting unit and Transmit-Receive Unit, wherein,
Detecting unit is used to detect interference base station information, and detected interference base station information is sent to Transmit-Receive Unit;
Transmit-Receive Unit is used to receive from the interference base station information of detecting unit and from the upstream interference report chance of base station, and after obtaining the upstream interference report chance, by the upstream interference report chance of obtaining the interference base station information of receiving is sent to the base station.
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