CN101141755B - Interfere notifying method in wireless area network system and implementing system thereof - Google Patents
Interfere notifying method in wireless area network system and implementing system thereof Download PDFInfo
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- CN101141755B CN101141755B CN200610127125A CN200610127125A CN101141755B CN 101141755 B CN101141755 B CN 101141755B CN 200610127125 A CN200610127125 A CN 200610127125A CN 200610127125 A CN200610127125 A CN 200610127125A CN 101141755 B CN101141755 B CN 101141755B
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Abstract
The present invention discloses an interference informing method in a wireless area network system (WRAN). The method comprises steps that A, the interference informing cluster of a customer premisesequipment (CPE) is set to relay the interference informing message; B, the CPE interfered performs multicast interference informing message in the wireless area network system; C, after detecting theinterference informing message, the CPE informs the interference informing message to a base station, or the base station directly receives the multicast interference informing message. The present invention also discloses an interference informing system in the WRAN system. After the present invention is applied, the frequency spectrum resource can be saved, and the influence of the interferenceinforming message to the system is very low.
Description
Technical field
The present invention relates to radio area network (WRAN) technical field, more particularly, the present invention relates to a kind of WRAN system and interfere notifying method thereof.
Background technology
In October, 2004, Institute of Electrical and Electric Engineers (IEEE) is formally set up IEEE802.22 working group, IEEE802.22 another name for radio area network (Wireless Regional Area Network, WRAN).The purpose of this working group is to use cognitive radio technology, and the idle frequency band of seeking permitted user (LU) communicates.Such as, in the licensed band such as VHF/UHF of wireless digital TV-set (DTV), seeking does not have the carrying frequency range of occupied frequency range as the WRAN network.
The WRAN network is a kind of emerging network technology, can for remote districts, provide high bandwidth to cover on a large scale than low-density population area.The WRAN system is a kind of system that exempts from permission operation (license-exempt operation), simultaneously, also all exempt between the WRAN system to permit, can be used by a plurality of operators, therefore the WRAN system does not have frequency spectrum planning, may have self-interference between the base station of WRAN (BS).
The physical technique of current WRAN system uses the OFDMA technology based on TDD to communicate.Each frame structure of WRAN system is divided into two subframes, is respectively a descending sub frame and a sub-frame of uplink, the centre guard time (can insert TRG or SSS slides from coexisting time slot) of being separated by.Descending sub frame comprises a Preamble, and customer headend equipment (CPE) can carry out synchronously and channel estimating with Preamble; Be frame control head (FCH) then, the information that is used for carrying present frame is such as whether comprising US-MAP message, DS-MAP message, UCD message, DCD message etc. in the present frame; Wherein US-MAP and DS-MAP are used for respectively to each CPE allocation of downlink and up channel.
In the WRAN system, exist a kind of so-called existing operation system to hide the scene of (Incumbent hidden).Under this scene, when WRAN user was in the overlapping region of leasing user (RU) system and permitted user (LU) system, because the interference of LU system, the user can't detect the signal of WRAN system, also can't obtain the information of WRAN system.Therefore, these CPE that are interfered need notify the base station (BS) of WRAN the current LU system that existed, but the CPE that is disturbed possibly can't normally detect the BS signal of WRAN, can not communicate with BS.
At present, there is a kind of explicit band to broadcast (EOB) method outward in the prior art.In this method, the BS of WRAN system is periodic broadcasting superframe (SCH) head on other frequency ranges outside its professional frequency range.The CPE that is disturbed by the outer SCH of band detection acquisition and BS in the chance of out-of-band communication, thereby notify BS, it has caused interference to LU user on certain frequency range.
Yet, in this mode, all irregularly broadcasting outside band of the BS of each WRAN, its consequence is to have taken a large amount of non-use frequency ranges.So this method has caused a large amount of wastes of frequency spectrum.In addition, because the prior unpredictable BS of CPE that is disturbed broadcasts SCH on which frequency range, so when Incumbent hidden took place, this method can not guarantee that the CPE that is disturbed can accurately notify BS.
Summary of the invention
In view of this, main purpose of the present invention is the interfere notifying method in a kind of WRAN of proposition system, to save frequency spectrum resource.
Another object of the present invention is the interference reporting system in a kind of WRAN of proposition system, to save frequency spectrum resource.
For achieving the above object, technical scheme of the present invention is achieved in that
Interfere notifying method in a kind of radio area network system, the method comprising the steps of:
A, interior customer headend equipment CPE or the similar CPE of longitude and latitude in zone that the position is close form the CPE physical cluster; From each CPE physical cluster, select a CPE at least, and the CPE that will select consists of described CPE and disturbs notice bunch from each CPE physical cluster; Disturb each CPE in the notice bunch to be created as a multicast group CPE, and each CPE in the notice multicast group has added described CPE and has disturbed notice bunch;
B, the CPE multicast interference informing message in described radio area network system that is interfered;
C, CPE notify this interference informing message to the base station after disturbing notice bunch to detect described interference informing message, and perhaps the base station directly receives this multicast interference informing message.
Describedly disturb each CPE in the notice bunch to be created as a multicast group CPE, and each CPE in the notice multicast group added described CPE and disturbed notice bunch, specifically comprised:
Disturb each CPE in the notice bunch to be created as a multicast group CPE, and to notify the multicast group of this establishment by MCA-REQ message each CPE in the multicast group be that the CPE that is used for the relaying interference informing message disturbs notice bunch; Or
Disturb each CPE in the notice bunch to be created as a multicast group CPE, wherein join in the process of this multicast group at CPE, notifying this this multicast of CPE group with MCA-REQ message to this CPE is that the CPE that is used for the relaying interference informing message disturbs and notifies bunch.
The method of described composition CPE physical cluster adopts the K-method of average.
Described interference informing message is a Narrowband CDMA CDMA signal.
The transmitted power of described CDMA signal increases gradually.
During described interference informing message meets the following conditions any or more than one combination in any:
Interference informing message is detected by CPE in the radio area network system or base station easily;
A little less than the system signal correlation of interference informing message and radio area network system, be unlikely to allow the radio area network system flase drop be the radio area network system signal;
Interference informing message does not cause interference to radio area network system.
The described CPE of step C disturbs notice bunch to notify this interference informing message to be to the base station:
After CPE disturbs the CPE in the notice bunch to detect described interference informing message, on the ascending time slot of its distribution, send the MAC bag of urgent coexistent state indication (UCS) bit position 1.
The described CPE of step C disturbs notice bunch to notify this interference informing message to be to the base station:
CPE reports the UCS notification message by competitive way after disturbing the CPE in the notice bunch to detect described interference informing message on the UCS announcement slot, the form of wherein said UCS notification message is the MAC bag that does not carry protocol Data Unit (PDU).
The described CPE of step C disturbs notice bunch to notify this interference informing message to be to the base station:
CPE reports the UCS notification message by competitive way after disturbing the CPE in the notice bunch to detect described interference informing message on existing operation system (Incumbent) channel.
The described CPE of step C disturbs notice bunch to notify this interference informing message to be to the base station:
CPE transmits interference informing message and gives the base station after disturbing the CPE in the notice bunch to detect described interference informing message on the ascending time slot of its distribution.
The described CPE that is interfered of step B is that CPE disturbs the CPE in the notice bunch, and perhaps CPE disturbs the CPE. outside the notice bunch
In the multicast set type Multicast of described MCA-REQ message group type field, expansion is useful on and shows that this multicast set type is for disturbing the information element of group of notifications.
Interference reporting system in a kind of radio area network system, this interference reporting system comprises:
The CPE that is interfered is used for when being interfered, multicast interference informing message in described radio area network system;
CPE disturbs notice bunch, is used for notifying this interference informing message to the base station after detecting described interference informing message;
The base station, the CPE that is used to be provided for the relaying interference informing message disturbs notice bunch, CPE in wherein that the position is the close zone or the similar CPE of longitude and latitude form the CPE physical cluster, from each CPE physical cluster, select a CPE at least, and the CPE that will select from each CPE physical cluster consists of described CPE and disturbs notice bunch, disturb each CPE in the notice bunch to be created as a multicast group CPE, and each CPE in the notice multicast group has added described CPE and has disturbed notice bunch, and receive by the CPE interference notice bunch interference informing message that forwarding comes, perhaps the base station directly receives this multicast interference informing message.
The described CPE that is interfered is that CPE disturbs the CPE in the notice bunch, and perhaps CPE disturbs the CPE outside the notice bunch.
As can be seen, in the present invention, the CPE that at first is provided for the relaying interference informing message disturbs notice bunch from technique scheme; The CPE that is interfered then is the multicast interference informing message in described radio area network system; Then, CPE notifies this interference informing message to the base station after disturbing notice bunch to detect interference informing message.This shows, use after the present invention, the present invention disturbs the CPE of relaying to belong to a Logic Cluster, therefore can not cause the notification message blast of system owing to relaying disturbs notice, thereby greatly saved frequency spectrum resource, can be owing to disturbing the notice relay processes to cause the forwarding storm of system.
In addition, the present invention is a kind of method of disturbing notice bunch relaying to disturb notice of utilizing, and does not need the CPE that is disturbed must directly notify the base station, and is therefore little to the environmental impact of system.And the CPE that is disturbed has a plurality of, the CPE that is disturbed can use lower powered CDMA signal to disturb notice, so when detecting the distinctive signal of WRAN, a random delay is arranged, behind signal of transmission, can stop to send a period of time, therefore also greatly reduce interference WRAN system and LU system.
Description of drawings
Fig. 1 is the flow chart according to the interfere notifying method in the radio area network system of the present invention;
Fig. 2 is the DTV TV radiation areas schematic diagram according to the embodiment of the invention;
Fig. 3 is subjected to DTV interference effect radiation schematic diagram for the WRAN system according to the embodiment of the invention;
Fig. 4 is according to the overlapping schematic diagram in the base station of the embodiment of the invention and DTV cell site;
Fig. 5 is the overlapping schematic diagram in base station and DTV cell site according to another embodiment of the present invention;
Fig. 6 is the channel switching flow schematic diagram according to the embodiment of the invention;
Fig. 7 is the handling process schematic diagram that is disturbed CPE according to the embodiment of the invention;
Fig. 8 is according to the structural representation that disturbs reporting system in the radio area network system of the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Main thought of the present invention is: the CPE that at first is provided for the relaying interference informing message disturbs notice bunch; The CPE that is interfered is the multicast interference informing message in described radio area network system; CPE notifies this interference informing message to the base station after disturbing notice bunch to detect described interference informing message.
Fig. 1 is the flow chart according to the interfere notifying method in the radio area network system of the present invention.As shown in Figure 1, this method comprises:
Step 101: the CPE that is provided for the relaying interference informing message disturbs notice bunch;
Step 102: the CPE that is interfered is the multicast interference informing message in described radio area network system;
Step 103:CPE notifies this interference informing message to the base station after disturbing notice bunch to detect described interference informing message, and perhaps the base station directly receives this multicast interference informing message.
Wherein, disturb notice bunch in order to set up, BS need be according to following steps: at first, set up physical cluster (Physical Cluster according to the geographical position of CPE, PC), the CPE in wherein that the position is close zone forms physical cluster, and can form a plurality of physical cluster thus.BS can determine physical cluster from the distance of BS according to CPE, if BS can distinguish the direction of CPE, BS can also divide physical cluster according to the azimuth-range of the relative BS of CPE.
Set up physical cluster only need BS according to certain algorithm the CPE simple packet, do not need to notify CPE.The algorithm that BS sets up physical cluster can have a variety of, such as preferably adopting the k-method of average.In this method, can be divided into one group to the similar CPE of certain attribute (such as the position that is relative BS, can service range+orientation weigh); If CPE uses global positioning system (GPS), can also be according to longitude and latitude, the CPE that longitude and latitude is similar is divided into one group of physical cluster.
Then, BS selects a CPE from each physical cluster, and utilize the CPE from each physical cluster, select form a Logic Cluster (logic Cluster, LC).This Logic Cluster is exactly to be used for relaying to detect the interference notice bunch of interference informing message.Logic Cluster has comprised the CPE representative in each geographical position, BS overlay area, and two close CPE of geographical position can not be selected into Logic Cluster.The purpose of setting up Logic Cluster is to it's time to disturb for fear of certain position probing, and a plurality of CPE report to BS simultaneously, thereby causes the paralysis of system or be busy.
At last, the CPE in the Logic Cluster is created as a multicast group.BS can notify CPE to become to disturb a member of notice bunch by MCA-REQ message.Can notify CPE to become to disturb a member of notice bunch here, by two methods.
First method: at first create a common multicast CPE group, notify this multicast group in order to notify Interference Detection by a multicast message then.
Because multicast message can not guarantee that all CPE can correctly receive, so the present invention preferably can also adopt second method.
Second method: when making CPE join multicast group, tell that its this multicast group is an Interference Detection group, such benefit is to guarantee that each CPE that adds this group can know the task of this group CPE.
In the multicast set type Multicast of described MCA-REQ message group type field, need expansion to be useful on and show that this multicast set type is for disturbing the information element of group of notifications.To those skilled in the art, the method that BS control CPE adds multicast group is known, and roughly flow process wherein is as follows:
BS certain user if desired joins a multicast group, and BS at first sends MCA-REQ message to CPE, after CPE receives MCA-REQ message, if in the timing of BS, respond MCA-RSP, this CPE adds just success of multicast group so, otherwise, just do not join multicast group.When the candidate CPE of a physical cluster joins when disturbing the group of notifications failure, BS need reselect a CPE and join the interference group of notifications from this physical cluster, has only success to join the CPE that disturbs group of notifications and is only the member who disturbs notice bunch.
In order to disturb the notice of group of notifications to tell CPE with setting up, make CPE recognize that the purpose of this interference group of notifications is for detected interference being notified to BS, need expanding the MCA-REQ message format. such as: in MCA-REQ message, increasing an information element (IE). table 1 is a MCA-REQ message format table; Table 2 is the information element table of MCA-REQ message. as seen, in the information element of MCA-REQ message, in multicast set type Multicast group type field, expansion is useful on and shows that this multicast set type is for disturbing the information element of group of notifications.
MCA-REQ message format table
| Grammer | Size | Explanation |
| MCA-REQ_Message_Format(){ | ||
| Management Message Type＝21 | 8bits | |
| Transaction ID | 16bits | |
| Information Elements(IEs) | Variable | |
| } |
Table 1
The MCA-REQ information list of elements
| Name | Element ID (1byte) | Length (bytes) | Value (Value) |
| Multicast (Multicast) CID | 1 | 2 | Either transport or multicast management CID() |
| Distribute | 2 | 1 | 0x00=leaves multicast group 0x01=and adds the multicast group |
| Multicast set type (Multicast group type) | 3 | 1 | The conventional 1=of 0=disturbs all the other reservations of group of notifications |
| Name | Element ID (1byte) | Length (bytes) | Value (Value) |
| The period allocated parameter | 4 | 4 | Only effective to transmission CID. Byte 0 (LS byte)=m Byte 1=k Byte 2=n Byte 3=keeps Multicast group gets an upstream multicast allocation at the end of the frame #N if:N mod k=m; Size of allocation is n. |
| Operation | 5 | 1 | 0＝allocate 1＝deallocate |
| Keep | 7-255 |
Table 2
When CPE is subjected to the interference of LU system, disturbed CPE need disturb notice.At this moment, the LU system can be the DTV signal, also can be Part74 equipment (microphone).Because the microphone radiant power is little, so can not influence the communication between CPE and the BS substantially.
Fig. 2 is the DTV TV radiation areas schematic diagram according to the embodiment of the invention; Fig. 3 is subjected to DTV interference effect radiation schematic diagram for the WRAN system according to the embodiment of the invention; Fig. 4 is according to the overlapping schematic diagram in the base station of the embodiment of the invention and DTV cell site; Fig. 5 is the overlapping schematic diagram in base station and DTV cell site according to another embodiment of the present invention.
Represented DTV TV radiation areas among Fig. 2, wherein:
The distance that on behalf of TV, TV Rx curve can normally receive; BS/CPE RX curve representative conference influences the normal distance that receives of WRAN BS/CPE; BS/CPE detects and represents BS/CPE can detect the distance of DTV cell site, and this means that also BS/CPE has the detectivity higher than DTV receiver.
In Fig. 3, express DTV subscriber equipment and WRAN subscriber equipment detectability in the zone, wherein:
The distance that on behalf of WRAN CPE, TV Rx curve can normally receive; The distance that on behalf of the DTV receiver, CPE Rx curve can be interfered.
In Fig. 4, BS and DTV cell site are overlapping.In this case, if CPE is in unshadowed area, can receives the WRAN system signal by interference-free, and detect less than the DTV signal.
If CPE is in the diagonal line hatches district, be in the WRAN CPE Rx curve and the BS/CPERX of DTV and the overlay region in the zone that the BS/CPE detection line fences up, can receive the WRAN system signal, but can detect the DTV signal, this zone itself does not belong to the working region (owing to being positioned at outside the DTV TV Tx line) of DTV, so not very be positioned at the overlapping region.
If CPE is in round dot shadow region in the circle, be in the WRAN CPE Rx curve and in the zone in the BS/CPE RX curve of DTV, then WRAN CPE and reception are affected. and the CPE in regional hereto needs notice BSWRAN system and LU system to exist in current frequency range and conflicts.
Fig. 5 is the overlapping situation of BS and DTV cell site.In this case, if CPE is in unshadowed area, can glitch-free reception WRAN system signal, and detect less than the DTV signal.
If CPE is in the diagonal line hatches district, be in the WRAN CPE Rx curve and the BS/CPERX of DTV and the overlay region in the zone that the BS/CPE detection curve fences up, can receive the WRAN system signal, but can detect the DTV signal, this zone itself does not belong to the working region (owing to being positioned at outside the DTV TV Tx curve) of DTV, so not very be positioned at the overlapping region.
If CPE is in round dot shadow region in the circle, promptly in the WRAN CPE Rx curve and in the zone in the BS/CPE RX curve of DTV, then WRAN CPE receives and is affected.CPE in the zone needs notice BS hereto, and there are conflict in WRAN system and LU system in current frequency range.
If CPE is positioned at the horizontal line shadow region, promptly be positioned at the overlapping region of BS Tx curve and the DTV TVTx curve of WRAN, DTV receiver and WRAN CPE can't operate as normal.
Reason whatsoever, the criterion whether decision sends interference informing message is: CPE can detect the characteristic signal of WRAN system, but can't communicate by letter with it.
Preferably, the CPE that is disturbed sends notification signal in the following manner.The WRAN system exists two class QP (silence period) to be used for monitoring the signal of LU system.For fast detecting QP,, do not influence the leading transmission of system-frame, so its influence can not considered because the time is very short.For precise monitoring, the QP time is long, such as a frame, so leadingly do not send.Therefore whether to have the time of WRAN system be 40ms to preferred detection, is equivalent to the time of two frames.If do not detect frame preamble in the 40ms, can think that so the frequency range of WRAN system changes.
After influenced CPE detects the WRAN system, send the entity of notification signal to the WRAN system.Notification signal can be distinctive signal, and the preferred requirement of structure notification signal is:
(1) detected by the entity of WRAN system (comprising CPE and BS) easily;
(2) and the signal correlation of WRAN system very weak, do not allow the WRAN flase drop be the WRAN system signal;
(3) the WRAN system is not caused bigger interference.
Preferably, the present invention uses the narrowband CDMA signal as notification signal, just sends a spread spectrum code sequence.
At this moment, the interference notifying process of the CPE that is disturbed is as follows:
At first, send the probability that disturbs notification signal simultaneously in order to reduce as a plurality of influenced CPE, each CPE produces a random number N, and N is an equally distributed random value between [1, M], the CPE N ms that need mourn in silence.
In order to narrate conveniently, abbreviate the CPE that is disturbed as CPE1, the CPE of the interference notice of WRAN system bunch is called CPE2.Then, CPE1 (CPE that is just disturbed) sends notification signal on the frequency range of the characteristic signal that detects the WRAN system, when sending for the first time, with minimum normal power/CDMA spreading gain, each time later on sends notification signal, and its transmitted power need increase power one by one.In order to improve WRAN entity detection probability, each notification signal can continue the regular hour, for example the 5ms frame.
Then: CPE1 starts T39 timer (60ms mourns in silence), 3 frame times that are equivalent to the WRAN system, like this when one of WRAN system CPE that disturbs notice bunch detect disturb notification signal after, it can have time enough to notify BS after receiving the interference notice that is subjected to interference effect CPE.In addition, when a plurality of influenced CPE send the interference notification signal, owing to have the silence period, so reduced the probability that a plurality of CPE send notification signal simultaneously.Like this, disturb notice bunch CPE just can notify BS to exist and disturb, also disturbed notification signal seriously to disturb otherwise detect the CPE that disturbs notification signal, to such an extent as to can not normally notify BS by these.
At last: T39 timer expiry (60ms mourns in silence), detect on the current frequency range and whether can detect characteristic signal, if can not detect, if being described, the BS of WRAN adjusted to other frequency ranges. CPE need search for the synchronizing signal of the WRAN on other frequency ranges so. can also detect, illustrate that CPE also needs to send the interference notification signal, jump to resend the step of disturbing notification signal.
After CPE2 (disturb notice bunch CPE) measures described interference informing message, notify this interference informing message to the base station.At this moment, add to disturb the CPE of notice bunch to utilize its perception antenna to detect the spread spectrum code sequence that disturbs notice in real time.Its perception antenna can separate with the Data Receiving antenna, also can be the unification of Data Receiving antenna and perception antenna.When disturbing notice bunch CPE to receive such interference notification signal, must report up this signal condition.Its method of reporting has following several mode:
After first kind of mode: CPE disturbs the CPE in the notice bunch to detect described interference informing message, on ascending time slot, send the MAC bag of UCS bit position 1; Perhaps
The second way: CPE reports the UCS notification message by competitive way after disturbing the CPE in the notice bunch to detect described interference informing message on the UCS announcement slot, the form of wherein said UCS notification message is the MAC bag that does not carry PDU; Perhaps
The third mode: CPE reports the UCS notification message by competitive way after disturbing the CPE in the notice bunch to detect described interference informing message on the Incumbent channel.
The 4th kind of mode: CPE transmits interference informing message and gives the base station after disturbing the CPE in the notice bunch to detect described interference informing message on the ascending time slot of its distribution.
Corresponding to first kind of mode, on the ascending time slot of its distribution, the UCS bit of the MAC of transmission bag puts 1.Table 3 is the form shfft of common MAC head:
The form shfft of common MAC head
| Grammer | Size | Explanation |
| General_MAC_Header_Format () | ||
| EC | 1bits | The load of encrypting control 0=back does not have the load of encrypted 1=back encrypted |
| Type (Type) | 6bits | Indicate the son head and the special load that comprise in the current message. |
| Keep | 3bits | Keep |
| EKS | 2bits | The sequence of encryption key sequence traffic encryption key (TEK) |
| Grammer | Size | Explanation |
| UCS | 1bit | Urgent Coexistence Situation CPE user is used to refer to whether BS is current has the existing subscriber to take current channel.0=does not have existing subscriber's busy channel 1=not have existing subscriber's busy channel |
| CN | 8bits | Channel number is when UCS==1, and indicating is that channel is taken by existing operation system; When UCS==0, then be empty. |
| Length (Length) | 11 bits | Indicate the total length that back MAC PDU adds MAC head and CRC. |
| CID | 16 bits | Connection identifier |
| HCS | 8bits | MAC verification sequence |
| } |
Table 3
Corresponding to the second way: if do not distribute upstream bandwidth at present frame, it can report the UCS notification message by competitive way on the UCS announcement slot.At this moment, the form of UCS notification message is a MAC head that does not carry PDU, and is as shown in table 3.
Corresponding to the third mode: if do not distribute upstream bandwidth at present frame, it can report CDMA UCS notification message by competitive way on the Incumbent channel.At this moment, detect CPE direct Incumbent code of transmission on the Incumbent channel that LU disturbs, rather than MAC packet header, its effect inserts the same with CDMA user, the Incumbent code that BS sends to the user in the matching detection of UCS by the CDMA word (can detect the Incumbent code that a plurality of users send here), estimate at the user and will report the UCS state, upstream bandwidth of system assignment then, CDMA_Allocation_IE (referring to table 4), CPE mate this distribution by code and Symbol and distribute to oneself.Wherein, table 4 distributes the IE form shfft for CDMA.
Mix at the branch of appointment then and send a UCS notification message.Value according to the Usage of CDMA_Allocation_IE form determines how to send indication.Work as Usage=0, send a versatile MAC head (general MAC header), do not carry PDU, but UCS equals 1; Work as Usage=1, then send a MAC message, UCS=1, and carry detailed LU user's jamming report.
CDMA UCS notice is compared with the front, and advantage is that its detection threshold can be lower, confirms that speed ratio is more slow but shortcoming is UCS, because need further require the user to confirm by CDMA_Allocation_IE.
The Notification Method of this first three UCS all is the method that current agreement has been stipulated.
CDMA distributes the IE form shfft
| Grammer | Size | Explanation |
| CDMA_Allocation_IE () | ||
| Duration (Duration) | 6bits | With the MAC time slot is the unit indication duration |
| Duplicated code is represented (Repetition Coding Indication) | 2bits | Expression uses duplicated code (repetition code) 0b00-in the burst that distributes not have repetition coding 0b01-to use 2 Repetition coding 0b10-to use 4 Repetition coding 0b11-to use 6 Repetition coding |
| Coding (Code) | 8bits | The CDMA sign indicating number that CPE sends, CPE user is mated the purposes of determining this yard with this yard. |
| Symbol (Symbol) | 8bits | The PHY symbol that indication CPE uses, CPE determines that with this whether this distribution is to this user; |
| Channel (Channel) | 7bits | Support CPE to send the channel of sign indicating number; |
| Usage (Usage) | 1bit | Depend on different Code types, this field has the different meanings.If whether the indication of ((Code=Ranging) or (Code=BW Request)) this field comprises a Bandwidth (BW) Request in this distribution.1=yes; If whether 0=no (Code=Incumbent) this field indication CPE must only send MAC header and notice.1＝yes；0＝no |
| } |
Table 4
When BS receive disturb notice after, BS detects the UCS report of disturbing notice bunch CPE, when perhaps directly detecting the interference notice of influenced CPE, determines that then interference has taken place current frequency range.From a candidate channel, select a frequency range so, carry out channel and switch.Current channel switching flow is stipulated in agreement.Fig. 6 is the handling process schematic diagram that is disturbed CPE according to the embodiment of the invention.As shown in Figure 6, this method comprises:
Step 601:BS sends CHS-REQ message request CPE and carries out the channel switching, indicates the destination channel that channel switches.
Step 602: respond when channel switch request message needs CPE, CPE sends CHS-RSP message and responds.
Fig. 7 is the handling process schematic diagram that is disturbed CPE according to the embodiment of the invention.As shown in Figure 7, this method comprises:
Step 701:CPE judges whether to detect the characteristic signal of WRAN, if do not have then execution in step 702, if detect then execution in step 703;
Step 702: the redirect frequency range also withdraws from this flow process;
Step 703:CPE judge can with WRAN system communication, if execution in step 704 then, otherwise execution in step 705:
Step 704:CPE operate as normal, and withdraw from this flow process;
Step 705:CPE random delay N millisecond;
Step 706～step 707:CPE sends interference informing message, stops to send 60 milliseconds then.
The invention allows for the interference reporting system in a kind of WRAN system.Fig. 8 is according to the structural representation that disturbs reporting system in the radio area network system of the embodiment of the invention.As shown in Figure 8, this interference reporting system comprises:
The CPE that is interfered is used for when being interfered, multicast interference informing message in described radio area network system;
CPE disturbs notice bunch, is used for notifying this interference informing message to the base station after detecting described interference informing message;
The base station, the CPE that is used to be provided for the relaying interference informing message disturbs notice bunch, and receives by CPE and disturb the notification message of disturbing that notice bunch sends, and perhaps the base station directly receives this multicast interference informing message.
Wherein, the described CPE that is interfered is that CPE disturbs the CPE in the notice bunch, and perhaps CPE disturbs the CPE outside the notice bunch.
In sum, at first the present invention is a kind of method of disturbing notice bunch relaying to disturb notice of utilizing, and does not need affected CPE must directly notify BS, and is therefore little to the environmental impact of system.In addition, the present invention disturbs the CPE of relaying to belong to a Logic Cluster, therefore can not cause the notification message of system to explode owing to relaying disturbs notice, and affected CPE uses lower powered CDMA signal to disturb notice, when detecting the distinctive signal of WRAN, a random delay is arranged.Behind signal of transmission, stop to send a period of time, so greatly reduced interference to WRAN system and LU system.
Simultaneously, in the present invention, the power of the interference of the CPE that is disturbed notice CDMA signal preferably increases progressively.When not having the CPE user of WRAN system, increase power when neighbouring so, up to there being CPE user's relaying to report interference, perhaps BS directly receives and disturbs notice.Affected CPE on interference band, can not detect the characteristic signal of WRAN system the time, then need to change frequency range and remove to detect WRAN, up to can on a frequency range, detecting the WRAN characteristic signal, and can with WRAN system proper communication after, then change normal operating state over to.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. the interfere notifying method in the radio area network system is characterized in that the method comprising the steps of:
A, interior customer headend equipment CPE or the similar CPE of longitude and latitude in zone that the position is close form the CPE physical cluster; From each CPE physical cluster, select a CPE at least, and the CPE that will select consists of described CPE and disturbs notice bunch from each CPE physical cluster; Disturb each CPE in the notice bunch to be created as a multicast group CPE, and each CPE in the notice multicast group has added described CPE and has disturbed notice bunch;
B, the CPE multicast interference informing message in described radio area network system that is interfered;
C, CPE notify this interference informing message to the base station after disturbing notice bunch to detect described interference informing message, and perhaps the base station directly receives this multicast interference informing message.
2. the interfere notifying method in the radio area network system according to claim 1, it is characterized in that, describedly disturb each CPE in the notice bunch to be created as a multicast group CPE, and each CPE in the notice multicast group added described CPE and disturbed notice bunch, specifically comprised:
Disturb each CPE in the notice bunch to be created as a multicast group CPE, and to notify the multicast group of this establishment by MCA-REQ message each CPE in the multicast group be that the CPE that is used for the relaying interference informing message disturbs notice bunch; Or
Disturb each CPE in the notice bunch to be created as a multicast group CPE, wherein join in the process of this multicast group at CPE, notifying this this multicast of CPE group with MCA-REQ message to this CPE is that the CPE that is used for the relaying interference informing message disturbs and notifies bunch.
3. the interfere notifying method in the radio area network system according to claim 1 is characterized in that, the method for described composition CPE physical cluster adopts the K-method of average.
4. the interfere notifying method in the radio area network system according to claim 1 is characterized in that, described interference informing message is a Narrowband CDMA CDMA signal.
5. the interfere notifying method in the radio area network system according to claim 4 is characterized in that the transmitted power of described CDMA signal increases gradually.
6. the interfere notifying method in the radio area network system according to claim 1 is characterized in that, any during described interference informing message meets the following conditions or more than one combination in any:
Interference informing message is detected by CPE in the radio area network system or base station easily;
A little less than the system signal correlation of interference informing message and radio area network system, be unlikely to allow the radio area network system flase drop be the radio area network system signal;
Interference informing message does not cause interference to radio area network system.
7. the interfere notifying method in the radio area network system according to claim 1 is characterized in that, the described CPE of step C disturbs notice bunch to notify this interference informing message to be to the base station:
After CPE disturbs the CPE in the notice bunch to detect described interference informing message, on the ascending time slot of its distribution, send the MAC bag of urgent coexistent state indication UCS bit position 1.
8. the interfere notifying method in the radio area network system according to claim 1 is characterized in that, the described CPE of step C disturbs notice bunch to notify this interference informing message to be to the base station:
CPE reports the UCS notification message by competitive way after disturbing the CPE in the notice bunch to detect described interference informing message on the UCS announcement slot, the form of wherein said UCS notification message is the MAC bag that does not carry protocol Data Unit PDU.
9. the interfere notifying method in the radio area network system according to claim 1 is characterized in that, the described CPE of step C disturbs notice bunch to notify this interference informing message to be to the base station:
CPE reports the UCS notification message by competitive way after disturbing the CPE in the notice bunch to detect described interference informing message on existing operation system Incumbent channel.
10. the interfere notifying method in the radio area network system according to claim 1 is characterized in that, the described CPE of step C disturbs notice bunch to notify this interference informing message to be to the base station:
CPE transmits interference informing message and gives the base station after disturbing the CPE in the notice bunch to detect described interference informing message on the ascending time slot of its distribution.
11. the interfere notifying method in the radio area network system according to claim 1 is characterized in that, the described CPE that is interfered of step B is that CPE disturbs the CPE in the notice bunch, and perhaps CPE disturbs the CPE outside the notice bunch.
12. the interfere notifying method in the radio area network system according to claim 2, it is characterized in that in the multicast set type Multicast of described MCA-REQ message group type field, expansion is useful on and shows that this multicast set type is for disturbing the information element of group of notifications.
13. the interference reporting system in the radio area network system is characterized in that this interference reporting system comprises:
The CPE that is interfered is used for when being interfered, multicast interference informing message in described radio area network system;
CPE disturbs notice bunch, is used for notifying this interference informing message to the base station after detecting described interference informing message;
The base station, the CPE that is used to be provided for the relaying interference informing message disturbs notice bunch, CPE in wherein that the position is the close zone or the similar CPE of longitude and latitude form the CPE physical cluster, from each CPE physical cluster, select a CPE at least, and the CPE that will select from each CPE physical cluster consists of described CPE and disturbs notice bunch, disturb each CPE in the notice bunch to be created as a multicast group CPE, and each CPE in the notice multicast group has added described CPE and has disturbed notice bunch, and receive by the CPE interference notice bunch interference informing message that forwarding comes, perhaps the base station directly receives this multicast interference informing message.
14. the interference reporting system in the radio area network system according to claim 13 is characterized in that, the described CPE that is interfered is that CPE disturbs the CPE in the notice bunch, and perhaps CPE disturbs the CPE outside the notice bunch.
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| CN101605374B (en) * | 2008-06-13 | 2013-02-27 | 中兴通讯股份有限公司 | Transmission method of interference indication message in wireless communication system and system |
| WO2010008177A2 (en) | 2008-07-14 | 2010-01-21 | Samsung Electronics Co., Ltd. | Apparatus and method for transmitting coexistence beacon protocol packet in cognitive radio based wireless communication system |
| KR101485553B1 (en) * | 2008-07-14 | 2015-01-23 | 삼성전자주식회사 | Apparatus and method for transmitting coexistance beacon protocol packet in a congnitive radio broadband wireless communication system |
| CN102547751B (en) * | 2012-03-27 | 2015-04-22 | 北京邮电大学 | Method and device for planning frequency of relay cellular network |
| CN115134909A (en) * | 2021-03-24 | 2022-09-30 | 中国移动通信集团湖北有限公司 | Method, device and equipment for positioning communication interference source and storage medium |
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