CN102100016A - Apparatus and method for transmitting coexistence beacon protocol packet in cognitive radio based wireless communication system - Google Patents
Apparatus and method for transmitting coexistence beacon protocol packet in cognitive radio based wireless communication system Download PDFInfo
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- CN102100016A CN102100016A CN2009801273821A CN200980127382A CN102100016A CN 102100016 A CN102100016 A CN 102100016A CN 2009801273821 A CN2009801273821 A CN 2009801273821A CN 200980127382 A CN200980127382 A CN 200980127382A CN 102100016 A CN102100016 A CN 102100016A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
Abstract
A method of and apparatus for operating a Coexistence Beacon Protocol (CBP) packet transmitter in a Cognitive Radio (CR)-based wireless communication system is provided. The method includes, identifying a Self-Coexistence Window (SCW) regular pattern of neighbor Wireless Regional Area Networks (WRANs), if vacant SCW slots are not periodically occurring, selecting a WRAN as a contender among the neighbor WRANs, performing a contention for transmitting the CBP packet with the contender within SCW slots that are occupied by the WRAN, and configuring an SCW usage pattern so that an SCW usage period of the CBP packet sender is double that of an SCW usage period of the contender when winning in the contention.
Description
Technical field
The present invention relates to system of broadband wireless communication based on cognitive radio (CR).More specifically, the present invention relates to be used for sending the equipment and the method for coexistence beacon protocol (CBP) bag at wireless communication system based on CR.
Background technology
The development of radio communication has caused the situation of several coexistence of communication systems.The example of system comprises: be called the wireless communication system of employing code division multiple access (CDMA) scheme of second generation technology, the wireless communication system of use international wireless communication (IMT)-2000 scheme that is called third generation technology and the system that is called use OFDM (OFDM) scheme of the 4th generation technique.In this case, the system of coexistence uses different communication plans and service is provided by using different frequency bands.Yet, because radio communication is used limited frequency resource, so exist frequency resource to be not enough to allow the problem of a large amount of coexistence of systems.
Therefore, there is the research that cognitive radio (CR) technology is carried out, the interim untapped frequency band (channel) in the preallocated frequency band during wherein the cognitive radio technology utilization is used.That is, even authorized system uses assigned frequency band, always also be not to use entire belt wide.Therefore, search for by the interim untapped channel of authorized system, in service range, provide service to subscriber equipment (UE) then by the channel that finds based on the wireless communication system of CR.For example, be that TV (TV) signal sends the interim untapped frequency band of use in the frequency band that distributes.
When wireless communication system used the CR technology, base station of sub-district (BS) must be to other BS common share communication information so that effective shared frequencies resource separately to manage it.For this reason, in the wireless communication system based on CR, BS uses synchronous wrapping to send the coexistence beacon protocol (CBP) that comprises its communication information to adjacent BS from coexistence window (SCW) time slot, and adjacent BS wraps common share communication information by receiving CBP.The SCW time slot is positioned at the precalculated position of every frame.CBP comprises the multiple information that relates to from the algorithm that coexists, for example position of corresponding BS, sensing result, progress msg, alternate channel tabulation etc.
As mentioned above, in the wireless communication system based on CR, BS wraps by transmission and reception CBP and uses SCW to share the information essential to each sub-district.Yet, because SCW is a limited number of resources, so conflict occurs when a plurality of BS send the CBP bag.If wrap because the conflict BS in the transmission of CBP bag fails correctly to receive CBP from adjacent BS, then can not the normal management system operation.Therefore, there is demand, promptly do not have conflict or send and receive the CBP bag mistakenly correctly to operate wireless communication system based on CR to following method.
Summary of the invention
One aspect of the present invention is to be used to solve the problems referred to above and/or deficiency at least, and so that following at least advantage to be provided.Therefore, one aspect of the present invention provides the apparatus and method of the conflict of the transmission that is used for avoiding coexistence beacon protocol (CBP) bag, and wherein the coexistence beacon protocol bag is in the wireless communication system based on cognitive radio (CR).
Another aspect of the present invention provide be used for by sign based on the adjacent wireless area network (WRAN) of the wireless communication system of CR from coexistence window (SCW) normal mode to select suitable competitor's apparatus and method.
Another aspect of the present invention provides the apparatus and method that are used for share the SCW time slot by contention based on the wireless communication system of CR.
Thereby another aspect of the present invention provides the wireless communication system that is used for based on CR and participates in contention to improve the apparatus and method that SCW uses shared SCW time slot of period by WRAN.
According to an aspect of the present invention, provide the method for a kind of operation based on the bag of the CBP in the wireless communication system of CR transmit leg.This method comprises: the SCW normal mode that identifies adjacent WRAN; If idle SCW time slot does not periodically occur, then from adjacent WRAN, select WRAN as the competitor; In the SCW time slot that takies by WRAN, carry out the contention that is used to send the CBP bag with the competitor; And when winning in contention, it is the twice of competitor's SCW use period that configuration SCW use pattern makes the SCW of CBP bag transmit leg use the period.
According to another aspect of the present invention, provide the device that is used for sending based on the CBP bag of wireless communication system.This device comprises: analyzer is used to identify the SCW normal mode of adjacent WRAN; Selector if idle SCW time slot does not periodically occur, then is used for selecting WRAN as the competitor from adjacent WRAN; And controller, be used for the SCW time slot that occupies at WRAN and carry out the contention that is used to send the CBP bag with the competitor, and configuration SCW use pattern makes that when win contention it is the twice of competitor's SCW use period that the SCW of CBP bag transmit leg uses the period
For those skilled in the art, following specific description in conjunction with the drawings, other features of the present invention, advantage and notable attribute will become obviously, and the following specific description that wherein combines accompanying drawing discloses one exemplary embodiment of the present invention.
Description of drawings
From following explanation in conjunction with the accompanying drawings, above-mentioned and other aspects of particular exemplary embodiment of the present invention, feature and advantage will become more obvious, in the accompanying drawing:
Fig. 1 illustration is according to one exemplary embodiment of the present invention, the example of the new wireless area network (WRAN) that inserts in based on the system of broadband wireless communication of cognitive radio (CR);
Fig. 2 A and Fig. 2 B illustration identify the result's of adjacent WRAN example according to one exemplary embodiment of the present invention by the new WRAN that inserts in based on the system of broadband wireless communication of CR;
Fig. 3 illustration obtains based on the example from coexistence window (SCW) time slot in the system of broadband wireless communication of CR according to one exemplary embodiment of the present invention;
Fig. 4 A to Fig. 5 C illustration when discharging WRAN in based on the system of broadband wireless communication of CR, changes the method that SCW uses the period according to one exemplary embodiment of the present invention;
Fig. 6 illustration is according to one exemplary embodiment of the present invention, the example of the new WRAN that inserts in based on the system of broadband wireless communication of CR;
Fig. 7 A and Fig. 7 B illustration identify the result's of adjacent WRAN example according to one exemplary embodiment of the present invention by the new WRAN that inserts in based on the system of broadband wireless communication of CR;
Fig. 8 illustration obtains the example based on the SCW time slot in the system of broadband wireless communication of CR according to one exemplary embodiment of the present invention;
Fig. 9 illustration is according to one exemplary embodiment of the present invention, is used for the example based on the contention of the SCW time slot of the system of broadband wireless communication of CR;
Figure 10 and Figure 11 illustration are according to the operation based on the bag of the CBP in the wireless communication system of CR transmit leg of one exemplary embodiment of the present invention;
Figure 12 be illustration according to one exemplary embodiment of the present invention, the flow chart of the operation of CBP bag transmit leg when in based on wireless communication system, discharging adjacent WRAN;
Figure 13 is an illustration according to the block diagram based on the structure of the bag of the CBP in the wireless communication system of CR transmit leg of one exemplary embodiment of the present invention.
Run through accompanying drawing, should be noted that identical Reference numeral is used for representing identical or similar element, feature and structure.
Embodiment
Provide with reference to the accompanying drawings following explanation to help comprehensive understanding to claim and the one exemplary embodiment of the present invention that equivalent limited thereof.It comprises multiple detail with help understanding, but will think that these only are exemplary.Therefore, those skilled in the art only will know otherwise depart from the scope of the present invention with spirit and can make multiple variation and modification to the embodiment of explanation herein.In addition, for clarity and brevity, omit the explanation of known function and structure.
The term and the words that use in following explanation and claim are not limited to dictionary meanings, but are only used to realize clear and consistent understanding of the present invention by the inventor.Therefore, clearly be to provide the following explanation of one exemplary embodiment of the present invention only to be used for the purpose of the invention that illustration purpose rather than restriction limit as claims and equivalent thereof for those skilled in the art.
To understand singulative " ", " one " and " being somebody's turn to do " comprises that plural number refers to thing, unless context spells out in addition.Like this, for example, relate to " assembly surface " comprise relate to one or more should the surface.
Feature, parameter or the numerical value quoted from by term " basic " expression are not accurately to obtain, but comprise and for example well known to a person skilled in the art that tolerance, measure error, measuring accuracy limit and the error of other factors or change can be existing with measuring of the effect that do not hinder the characteristic that intention provides.
The one exemplary embodiment of the present invention that the following describes relates to the technology that is used for avoiding based on the conflict in the transmission of coexistence beacon protocol (CBP) bag of the wireless communication system of cognitive radio (CR).Though will be that example describes with the wireless communication system based on quadrature multiplexing/OFDM (OFDMA) hereinafter, the present invention can use the wireless communication system of other types equally.
In wireless communication system based on CR, not only can pass through base station (BS), can also send the CBP bag by subscriber equipment (UE).In other words, under the control of the BS in service, UE can send the CBP bag.In addition, not only can pass through BS, can also receive the CBP bag by subscriber equipment (UE), and the BS of UE in service send the CBP that is received.That is, when sending and receiving the CBP bag, operate as an entity with UE at the BS that exists in the sub-district of BS.In other words, the logic entity that is used for sending/receive the CBP bag is not a node (for example BS, UE etc.) but comprises the wireless area network (WRAN) of all UE of the sub-district that is present in BS.Convenience for explanation in the following explanation of one exemplary embodiment of the present invention, is considered as an entity with WRAN.
In the wireless communication system based on CR of one exemplary embodiment of the present invention, if desired, WRAN by with the contention of adjacent WRAN, determine that it is from coexistence window (SCW) use pattern.If WRAN fails in contention, then WRAN attempts contention again in another SCW time slot.Otherwise if WRAN wins contention, the WRAN that has then failed in contention uses the period to double its SCW and share the SCW time slot with the WRAN that has won in contention.
The type of service of the SCW time slot among WRAN of " SCW uses pattern " expression, and comprise the use period of the SCW time slot in the use and the skew of SCW time slot.In following explanation, the type of service of SCW time slot in " SCW normal mode " expression WRAN group is the gathering that all SCW of belonging to each WRAN of a group use patterns.
Illustrate in greater detail method below with reference to Fig. 1 according to the use SCW of one exemplary embodiment of the present invention.
Fig. 1 illustration newly inserts the example of WRAN according to one exemplary embodiment of the present invention in based on the system of broadband wireless communication of CR.
With reference to figure 1, WRAN-1110, WRAN-2120, WRAN-3130 and WRAN-4140 are adjacent one another are, and by being arranged in the channel A executive communication of same frequency band.In this state, WRAN-N 100 new access channel A.When channel variation or when equipment when power-down state converts power-up state to maybe when rebuliding channel, new access occurs.
The CBP bag that WRAN-N 100 monitoring of new access channel A send from adjacent WRAN 110,120,130 and 140.That is, WRAN-N 100 receives the CBP bag from each SCW, and determines which WRAN sends the CBP bag.Then, WRAN 110,120,130 that the WRAN-N100 sign is adjacent and 140 SCW normal mode.In other words, WRAN-N 100 determine WRAN 110,120,130 and 140 each when use SCW.
Fig. 2 A and Fig. 2 B illustration identify the result's of adjacent WRAN example according to one exemplary embodiment of the present invention by the new WRAN that inserts in based on the system of broadband wireless communication of CR.Will be in the context of above-mentioned example about Fig. 1 key diagram 2A and Fig. 2 B.
If analysis result shows idle SCW time slot and periodically occurs that then WRAN-N100 configuration use pattern makes its SCW use the period consistent with the appearance period of idle SCW time slot, and sends the CBP bag according to the SCW use pattern that is disposed shown in Fig. 2 A.In this case, shown in Fig. 2 A, each of WRAN-1100 to WRAN-4140 takies a SCW time slot in per 5 SCW time slots, is 5 thereby SCW uses the period.Therefore, WRAN-1100 can use the period according to the SCW of 5 SCW time slots, uses idle SCW time slot to send the CBP bag.On the other hand, shown in Fig. 2 B, if adjacent WRAN 110,120,130 and 140 uses all SCW time slots, then WRAN-N 100 by with have the contention that the shortest SCW uses the WRAN of period, attempt to obtain the SCW time slot.When winning in contention, the SCW that WRAN-N 100 configuration SCW use patterns make its SCW use the period to double its competitor uses the period.The WRAN that has failed in contention makes its SCW use the period to double.
To describe in detail by contention with reference to figure 3 and obtain the SCW time slot method.
Fig. 3 illustration obtains the example of SCW time slot according to one exemplary embodiment of the present invention in based on the system of broadband wireless communication of CR.With key diagram 3 in the scene of the example described about Fig. 1, Fig. 2 A and Fig. 2 B in the above.
Adjacent WRAN 110,120,130 and 140 uses identical SCW to use the period.WRAN-N100 selects WRAN-2120 as the competitor.Then, in SCW time slot #2302, WRAN-N100 and WRAN-2120 competition CBP bag send.In this case, WRAN-N 100 with the contention of WRAN-2120 in fail.After the contention failure, WRAN-N 100 reselects its competitor.If reselected WRAN-2120, then WRAN-N 100 can compete once more in next period and WRAN-2120.In this case, WRAN-N 100 reselects WRAN-3130 as its competitor.At SCW time slot #3303, WRAN-N 100 sends with WRAN-3130 competition CBP bag.In this case, WRAN-N 100 with the contention of WRAN-3130 in win, and use SCW time slot #3303 thus to send the CBP bag.Therefore, WRAN-3130 makes SCW use the period to double, and the previous SCW that WRAN-N 100 configuration SCW use the period to make that its SCW use period is WRAN-3130 uses the twice of period.In other words, WRAN-N 100 and WRAN-3130 SCW use the period to be set to 8 SCW time slots.As a result, WRAN-N 100 uses SCW time slot # 11 311 to wrap to send CBP according to the period, and WRAN-3130 uses SCW time slot #7307 and SCW time slot # 15 315 to send the CBP bag according to the period.Therefore, WRAN-N 100 and WRAN-3130 share the SCW time slot that WRAN-3130 takies.
After as illustrated in Fig. 3, condition being set, can discharge the WRAN that has occupied the SCW time slot.That is, one among WRAN-1100, WRAN-2120, WRAN-3130, WRAN-4140 and the WRAN-N100 can stop its operation, perhaps the channel-changing in the operation can be become other channel.
In this case, idle SCW time slot can appear at the identical period of occupying with d/d WRAN of period.When idle SCW time slot generated, the WRAN of current use respective channel used the period by using idle SCW time slot to attempt to shorten its SCW.In this case, take the situation of idle SCW time slot for fear of a plurality of WRAN, the WRAN that attempts to take idle SCW time slot gives back the SCW that self takies time slot.In other words, from the viewpoint of the WRAN of new access, a plurality of WRAN competitions are to occupy the idle SCW time slot that occurs owing to d/d WRAN.Because giving back of SCW time slot estimates that WRAN will attempt to occupy idle SCW time slot.Yet there is following situation, wherein do not having additionally to take idle SCW time slot under the situation of giving back of SCW time slot.When idle SCW time slot was positioned at the center of the SCW time slot that had before taken, this situation appearred.In other words, when making up by the SCW time slot that will before take and idle SCW time slot when disposing one-period SCW time slot, might add idle SCW time slot and must not give back the SCW time slot.By with the identical contention of describing with reference to figure 3, carry out the trial that takies idle SCW time slot.The WRAN that is different from new access, the WRAN that has failed in contention can not attempt contention again.This is because the trial of lasting contention can damage the basic principle that SCW shares.
Fig. 4 A to Fig. 5 C illustration when discharging WRAN in based on the system of broadband wireless communication of CR, changes the method that SCW uses the period according to one exemplary embodiment of the present invention.With the context of the example described about Fig. 1, Fig. 2 A, Fig. 2 B and Fig. 3 in the above with discharged key diagram 4A to Fig. 5 C in the situation of WRAN-2120.Shown in Fig. 4 A, WRAN-1110, WRAN-2120 and WRAN-4140 use the SCW time slot of the period with 4 SCW time slots, and WRAN-3130 and WRAN-N 100 use the SCW time slot of the period with 8 SCW time slots.In this case, if discharge WRAN-2120 shown in Fig. 4 B, then idle SCW time slot appears at the SCW of WRAN-2120 and uses the identical period of period.The SCW that WRAN-3130 and WRAN-N 100 have 8 SCW time slots uses the period, and it uses the period than the time segment length of WRAN-1110 and WRAN-4140 thereby WRAN-3130 and WRAN-N 100 attempt to shorten its SCW.Idle SCW permission CBP shown in Fig. 4 B wraps in 4 SCW time slots and is sent out.Therefore, WRAN-3130 and WRAN-N 100 attempt contention to take idle SCW time slot.In this case, shown in Fig. 4 C, WRAN-N 100 wins in contention.Then, WRAN-N 100 no longer can take the SCW time slot that is taken by himself.Therefore, shown in Fig. 5 A, WRAN-N 100 discharges the SCW time slot that is taken by himself, and uses by winning the SCW time slot that contention obtains.As a result, having the idle SCW time slot of the period identical with the previous period of WRAN-N 100 newly occurs.In this case, emerging idle SCW time slot is positioned at the central authorities of the time slot that WRAN-3130 takies.This is because WRAN-N 100, has occupied half of the SCW time slot that occupied by WRAN-3130 by contention.This situation occurs in an exemplary embodiment, and in this one exemplary embodiment, as the result of SCW time slot contention, WRAN serves as to regulate SCW at interval to use the period with 2 index.Therefore, when WRAN-3130 additionally takies emerging idle SCW time slot, might add that previous shared time slot used the period to reduce by half SCW together.In this case, no longer give back previous shared time slot, thereby shown in Fig. 5 B, WRAN-3130 additionally occupies idle SCW time slot and does not give back the SCW time slot.In the situation of Fig. 5 C, owing to do not have other competitor, so WRAN-3 130 acquisition SCW time slots, and use the period to reduce by half SCW once more.Therefore, owing to release, so the SCW of WRAN-3 130 and WRNA-N 100 uses the period to shorten to 4 SCW time slots from 8 SCW time slots as WRAN-2 120.
In addition, in situation as shown in Figure 6, also can obtain the SCW time slot according to one exemplary embodiment of the present invention.
Fig. 6 illustration is according to one exemplary embodiment of the present invention, the example of the new WRAN that inserts in based on the system of broadband wireless communication of CR.
As shown in Figure 6, when two WRAN groups (promptly organizing A 510 and group B 520) when existing independently, WRAN-N 500 is new to be inserted and is organized both positions of influencing of A 510 and group B 520.
Fig. 7 A and Fig. 7 B illustration are according to one exemplary embodiment of the present invention, by identify the result's of adjacent WRAN example based on the new WRAN that inserts in the CR system of broadband wireless communication.With key diagram 7A and Fig. 7 B in the context of the example described about Fig. 6 in the above.
Belong to WRAN-A1 511, WRAN-A2 512, WRAN-A3 513 and the WRAN-A4 514 that organizes A 510 and belong to the SCW of Fig. 7 A among WRAN-B1 521, WRAN-B2 522, WRAN-B3 523 and the WRAN-B4 524 current use channel A that organize B 520.Yet the analysis result of WRAN-N500 is shown in Fig. 7 B.That is, because the difference of geographical position distance, WRAN-N 500 can not receive the CBP bag and receive the CBP bag from WRAN-B3 523 from WRAN-A4 514.In this case, can use identical SCW time slot to identify not on the same group SCW normal mode simultaneously, this is because the UE sign group separately that occurs at diverse location.That is, in the UE that belongs to WRAN-N 500, the SCW normal mode of the UE identified group A 510 adjacent, the SCW normal mode of the UE identified group B 520 adjacent with group B 520 with group A 510.
After the SCW normal mode that has identified group A 510 and group B 520, WRAN-N 500 selects to minimize the competitor of contention.When WRAN-N 500 obtained the SCW time slots, both were influential to group A 510 and group B 520 for it.Therefore, WRAN-N 500 selects the competitor to make and uses idle SCW time slot by at least one group.When winning in contention, it is the twice of competitor's SCW use period that WRAN-N 500 configuration SCW use patterns make its SCW use the period.The WRAN that has failed in contention makes its SCW use the period to double.
Now, below with reference to Fig. 8 the method that obtains SCW by contention is described in more detail.
Fig. 8 illustration obtains the example of SCW time slot according to one exemplary embodiment of the present invention in based on the system of broadband wireless communication of CR.With key diagram 8 in the context of the example described about Fig. 6, Fig. 7 A and Fig. 7 B in the above.
As shown in Figure 8, WRAN-N 500 competes with WRAN-B1 521 in SCW time slot #5705.In this case, the contention with WRAN-B1 521 does not influence group A 510.In this case, WRAN-N 500 with the contention of WRAN-B1 521 in win, use SCW time slot #5705 to send the CBP bag thus.Therefore, WRAN-B1 521 makes SCW use the period to double, and WRAN-N 500 configuration SCW use patterns make the previous SCW that its SCW use period is WRAN-B1 521 use the twice of period.In other words, WRAN-N 500 and WRAN-B1 521 SCW use the period to be set to 8 SCW time slots.Therefore, send for the CBP bag, WRAN-N500 uses SCW time slot # 13 713, and WRAN-B1 521 uses SCW time slot # 9 709.Therefore, to the influence of group A 510, WRAN-N 500 and WRAN-B1 521 do not share the SCW time slot that is occupied by WRAN-B1 521.
In the preceding method that obtains the SCW time slot, the new WRAN that inserts carries out contention, and determines that it is to win or fail in contention.The explanation that contention, contention are won, contention is failed is provided below.
Before sending the CBP bag, WRAN is provided with the random back time (random backoff time).The random back time is the transmission delay time of CBP bag.Passing through random back after the time from the time started of SCW time slot, WRAN sends the CBP bag.Therefore, even two WRAN use a SCW time slot to send the CBP bag, also be to send the CBP bag in the different time.In addition, above-mentioned two WRAN can discern the CBP bag that is sent by other WRAN.That is, when two WRAN use identical SCW time slot to wrap to send CBP, mean contention, when the CBP bag is at first sent, mean and win contention, and when sending the CBP bag, mean the contention failure by other WRAN.
Fig. 9 illustration is according to the example based on the contention of the SCW time slot of the system of broadband wireless communication of CR of being used for of one exemplary embodiment of the present invention.With key diagram 9 in the context of the example described about Fig. 6, Fig. 7 A, Fig. 7 B and Fig. 8 in the above.
As shown in Figure 9, if the random back time of WRAN-1 810 is less than the random back time of WRAN-2 820, then before WRAN-2 820 sent the CBP bag, WRAN-1 810 sent the CBP bag.Therefore,, WRAN-1 810 sends, so WRAN-1 810 determines that they win in contention because can not discerning the CBP bag that the WRAN by other that sends prior to the CBP of WRAN-1 810 bag causes.In addition, because WRAN-2 820 identifies the CBP bag that the WRAN by other that sends prior to the CBP of WRAN-2 820 bag causes, so WRAN-2820 determines its contention failure.
Except as Fig. 1 or the new example that inserts of WRAN shown in Figure 6, can there be the example that discharges WRAN.That is, when WRAN moves to the channel with another frequency or when power cut-off, the SCW time slot that is taken by d/d WRAN is in idle condition.In this case, remaining WRAN can additionally use idle time slot.
In the said process that obtains the SCW time slot, the new WRAN that inserts need at first discern the SCW normal mode of adjacent WRAN.For this reason, the new WRAN that inserts must monitor the CBP bag of WRAN in several image durations.When the CBP that sends on channel by monitoring wrapped to determine the SCW normal mode, the new WRAN that inserts received the CBP bag to each WRAN at least twice.That is, monitoring time is the maximum in the CBP transmit time segments of adjacent WRAN at least.
Therefore, in order to reduce the identification SCW required time of normal mode, each WRAN uses pattern information to append to the CBP bag its SCW.Therefore, even only receive a CBP bag from each WRAN, the SCW that the new WRAN that inserts also can understand corresponding WRAN uses pattern.For example, can or comprise that in customizing messages unit (IE) SCW uses pattern information in beacon medium access control (MAC) head of CBP bag.For example, with the type of pattern period or the type of position that will send the SCW time slot of next CBP bag therein represent that SCW uses pattern information.In this case, SCW uses pattern information to represent with following table 1.
Table 1
[table 1]
[table 1]
In above-mentioned table 1, ' type indicator ' field represents that information is pattern information or the positional information that will send the SCW time slot of next CBP bag therein, and according to the value of ' type indicator ' field, the number of the value of ' number ' field pointing-type period or residue frame from current time slots to the time slot that will send next CBP bag therein.Segment value determined value when herein, x represents the bit number of ' value ' field and can pass through max model.
Hereinafter, will be with reference to the accompanying drawings, be described more specifically the above-mentioned operation that is used to obtain the BS and the UE of SCW time slot.For the convenience of explanation, will be used to send the entity of CBP bag, for example BS and UE are called ' CBP wraps transmit leg ' jointly.
Figure 10 and Figure 11 illustration according to one exemplary embodiment of the present invention in operation based on the CBP in the wireless communication system of CR bag transmit leg.
With reference to Figure 10 and Figure 11, in step 901, CBP bag transmit leg inserts new channel.For example, CBP bag transmit leg is according to the spectrum-sensing result, by converting power-up state from power-down state to or inserting new channel by changing channel of operation.
After inserting new channel, proceed to step 903, the SCW normal mode of the WRAN that CBP bag transmitting side marking is adjacent.That is, CBP bag transmit leg receives the CBP bag to each SCW, and estimation sends the WRAN of CBP bag to discern the SCW normal mode of adjacent WRAN.If CBP bag transmit leg is UE, then UE is to BS report analysis result.In addition, if CBP bag transmit leg is BS, then BS combines its analysis result with the analysis result of reporting from UE.When adjacent WRAN used pattern information by using the CBP bag to send its SCW, the CBP bag that every next WRAN ground of CBP bag transmit leg receives adjacent WRAN used pattern with the SCW that estimates each WRAN, and definite SCW normal mode.For example, the SCW that comprises in the configuration CBP bag shown in top table 1 uses pattern.
Behind the SCW normal mode of each WRAN of sign, proceed to step 905, the CBP bag determines whether idle SCW time slot periodically occurs.In other words, CBP bag transmit leg determines whether to obtain the SCW time slot and not influential to other WRAN.
If idle SCW periodically occurring, then proceed to step 907, CBP bag transmit leg disposes its SCW and uses pattern, makes the appearance period of idle SCW time slot use the period consistent with its SCW.That is, CBP bag transmit leg dispose its SCW use pattern with the pattern basically identical that generates idle SCW time slot.
Otherwise, if idle SCW time slot does not periodically occur, then proceeding to step 909, CBP wraps sender-selected competitor to be used to obtain the SCW time slot.In this case, the CBP bag is sender-selected has the WRAN of the shortest SCW use period as the competitor.Periodically occur at least one SCW normal mode if identified a plurality of groups different SCW normal modes and idle SCW time slot, then CBP wraps sender-selected competitor to use at least one group idle SCW time slot.
After selecting the competitor, proceed to step 911, CBP bag transmit leg generates the random back time that is used for contention.That is, when the competitor began its SCW that is used to send the CBP bag, CBP bag transmit leg generated the random back time.
Subsequently, proceed to step 913, CBP bag transmit leg determines whether to have passed through the random back time.In other words, CBP bag transmit leg determines whether the time started that sends the SCW of CBP bag from the competitor passed through the random back time.
If do not pass through the random back time, then proceed to step 915, CBP bag transmit leg determines whether competitor's CBP bag receives.That is, CBP bag transmit leg determines whether CBP bag transmit leg fails in contention.If passing through random back was received the competitor before the time CBP bag, then CBP bag transmit leg is discerned its contention failure, and program turns back to step 909.In this case, can reselect identical competitor.Otherwise if do not receive competitor's CBP bag, then repeating step 913 and step 915 make CBP wrap the CBP bag that transmit leg has determined whether to pass through the random back time or do not received the competitor.
If definite result of step 913 had passed through the random back time before receiving competitor's CBP bag, then proceed to step 917, CBP bag transmit leg sends its CBP bag.CBP comprises the various information that relate to from the algorithm that coexists, for example: the position of corresponding BS, sensing result, progress msg, backup channel list etc.In addition, CBP can comprise additionally that the SCW of CBP bag transmit leg uses pattern information.For example, can shown in top table 1, dispose the SCW that comprises in the CBP bag and use pattern.
After sending the CBP bag, proceed to step 919, CBP bag transmit leg is discerned it and is won contention, and disposing its SCW use pattern, to make its SCW use period be that competitor's SCW uses the twice of period.Therefore, CBP bag transmit leg and competitor share the SCW time slot.
After this, proceed to (among Figure 11) step 921, CBP bag transmit leg determines whether it is CBP bag transmitting time.That is, CBP bag transmit leg is determined to send the use corresponding time of period with SCW of whether having passed through from last CBP bag.
If CBP bag transmitting time then proceeds to step 923, CBP bag transmit leg generates the random back time.That is, CBP bag transmit leg is determined concrete time delay, will send CBP from the SCW time started after this concrete time delay and wrap.
After this, proceed to step 925, CBP bag transmit leg determines whether passed through the random back time from the SCW time started.
If passed through the random back time, then proceed to step 927, CBP bag transmit leg sends its CBP bag, and program is returned step 921.CBP comprises the various information that relate to from the algorithm that coexists, for example: the position of corresponding BS, sensing result, progress msg, alternate channel tabulation etc.In addition, the CBP bag can comprise additionally that the SCW of CBP bag transmit leg uses pattern information.For example, can shown in top table 1, dispose the SCW that comprises in the CBP bag and use pattern.
Otherwise, if do not pass through the random back time, then proceeding to step 929, CBP bag transmit leg determines whether to receive the CBP bag of different WRAN.If do not receive the CBP bag of different WRAN, then repeating step 925 makes that with step 929 CBP bag transmit leg determines whether through the random back time or the CBP that does not receive different WRAN wraps.
If received the CBP bag of different WRAN before the time through random back, then proceed to step 931, CBP bag transmit leg is discerned its contention failure, and uses the period to double current SCW.Then, return step 921, CBP bag transmit leg determines according to the SCW use pattern of new configuration whether it is CBP bag transmitting time.
Figure 12 be illustration according to one exemplary embodiment of the present invention, when in based on the wireless communication system of CR, discharging adjacent WRAN, the flow chart of the operation of CBP bag transmit leg.The operation of Figure 12 is the operation of the CBP bag transmit leg of the current SCW of taking time slot.That is, the operation of Figure 12 is the subsequent operation to the operation of Figure 10 and Figure 11, and the subsequent step that is not included in the step 921 in the operation of Figure 10 and Figure 11 is performed.
With reference to Figure 12, in step 1001, CBP bag transmit leg determines whether idle SCW time slot periodically occurs.When discharging WRAN or when different WRAN takies the SCW time slot that is taken by the WRAN that is discharged, periodic idle SCW time slot occurs.
If idle SCW time slot periodically occurs, then proceed to step 1003, CBP bag transmit leg determines whether the appearance period of idle SCW time slot is less than its SCW and uses the period.That is, CBP bag transmit leg determines whether can shorten its SCW use period by taking idle SCW time slot.
Use the period if the appearance period of idle SCW is less than the SCW of CBP bag transmit leg, then proceed to step 1007, CBP bag transmit leg is determined to attempt taking the contention of idle SCW time slot and returning its SCW time slot.In other words, CBP bag transmit leg determines there is not available SCW time slot.Then, program proceeds to step 1009.
Otherwise if the appearance period of idle SCW time slot more than or equal to the SCW use period of CBP bag transmit leg, then proceeds to step 1005, CBP bag transmit leg determines its SCW uses the pattern and the combination of the pattern that generates idle SCW time slot whether to constitute a period.That is, CBP bag transmit leg determines whether position that idle SCW time slot is just occurring is positioned at the central authorities of the SCW time slot that is occupied by CBP bag transmit leg.If the SCW of CBP bag transmit leg uses the combination of the period of period and idle SCW not constitute a period, then the process of Figure 12 finishes.
Otherwise if constituting a period of the period of the SCW use period of CBP bag transmit leg and idle SCW time slot then proceeds to step 1009, CBP bag transmit leg generates the random back time that is used for contention.That is, when idle SCW time slot began, CBP bag transmit leg generated the random back time.
Subsequently, proceed to step 1011, CBP bag transmit leg determines whether to have passed through the random back time.In other words, CBP bag transmit leg determines whether passed through the random back time from the time started of idle SCW time slot.
If do not pass through the random back time, then proceed to step 1013, CBP bag transmit leg determines whether to receive the CBP bag of different WRAN.That is, CBP bag transmit leg is determined the whether contention failure of CBP bag transmit leg.Otherwise if do not receive competitor's CBP bag, then repeating step 1011 and step 1013 make CBP wrap the CBP bag that transmit leg has determined whether to pass through the random back time or do not received the competitor.If step 1013 is affirmed really and brightly then proceeded to step 1015 at the CBP bag that received the competitor through random back before the time, CBP bag transmit leg is discerned its contention failure, and uses pattern to use pattern as its SCW the SCW that uses before the contention.It is the SCW use pattern before CBP bag transmit leg recovers its contention.
If definite presentation of results of step 1011 had passed through the random back time before receiving competitor's CBP bag, then proceed to step 1017, CBP bag transmit leg sends its CBP bag.CBP comprises the variety of information that relates to from the algorithm that coexists, for example: the position of corresponding BS, sensing result, progress msg, backup channel list etc.In addition, the CBP bag can comprise additionally that the SCW of CBP bag transmit leg uses pattern information.For example, can shown in top table 1, dispose the SCW that is included in the CBP bag and use pattern.
After sending the CBP bag, proceed to step 1019, CBP bag transmit leg is discerned it and is won contention, and disposes its SCW and use pattern to comprise the pattern that generates idle SCW time slot.In this case, if carried out step 1005, then CBP bag transmit leg is configured to its SCW generate pattern consistent with the pattern that generates idle SCW time slot.Otherwise if also there is not execution in step 1005, then CBP bag transmit leg configuration mode uses its SCW the pattern of pattern and the idle SCW time slot of generation in conjunction with using pattern as new SCW in this pattern.
Figure 13 is an illustration according to the block diagram based on the structure of the bag of the CBP in the wireless communication system of CR transmit leg of one exemplary embodiment of the present invention.
With reference to Figure 13, CBP bag transmit leg comprises: spectral sensor 1102, band controller 1104, radio frequency (RF) receiver 1106, ofdm demodulator 1108, subcarrier de-mapping device 1110, symbol demodulator 1112, decoder 1114, CBP analyzer 1116, CBP maker 1118, encoder 1120, symbol modulator 1122, sub-carrier mapped device 1124, OFDM modulator 1126, RF reflector 1128 and CBP controller 1130.
The signal of the system that spectral sensor 1102 search are authorized.The frequency band user mode of the system that spectral sensor 1102 estimations are authorized is to search for the untapped channel of authorized system.Spectral sensor 1102 provides sensing result to band controller 1104.
Convert baseband signal under the signal of the RF frequency band that RF receiver 1106 will receive by antenna.Ofdm demodulator 1108 is that each OFDM code element is divided baseband signal, removes Cyclic Prefix (CP), then by carrying out fast Fourier transform (FFT) operation recovery band signal.Subcarrier de-mapping device 1110 divided band signals are used for each processing.For example, subcarrier de-mapping device 1110 extracts the CBP bag that uses the SCW time slot to receive.Symbol demodulator 1112 restituted signals are to convert thereof into bit stream.Decoder 1114 decoding bit streams.
CBP analyzer 1116 is analyzed the CBP bag that receives from adjacent WRAN.That is, CBP analyzer 1116 estimation sends the WRAN of CBP bag and relates to the information of the algorithm that coexists certainly of the WRAN that is used to send the CBP bag.Particularly, if WRAN sends its SCW use pattern information by using CBP to wrap, then CBP analyzer 1116 determines that by analyzing the CBP bag SCW of the WRAN of transmission CBP bag uses pattern, and provides the SCW that is estimated to use pattern to CBP controller 1130 subsequently.For example, can shown in top table 1, dispose the SCW that is included in the CBP bag and use pattern.
The bit stream of encoder 1120 coding CBP bags.Symbol modulator 1122 modulation bit stream is to convert thereof into complex symbol.Sub-carrier mapped device 1124 is mapped to frequency domain with complex symbol.OFDM modulator 1126 becomes time-domain signal by carrying out inverse fast Fourier transform (IFFT) operation with the conversion of signals that is mapped to frequency domain, inserts CP, thereby is configured to the baseband OFDM code element.RF reflector 1128 is up-converted into the RF band signal with baseband OFDM, and by antenna transmission RF band signal.
If there is not idle SCW time slot in the explanation of the analysis result of pattern analyzer 1132, then competitor's selector 1134 selects the competitor to be used to obtain the SCW time slot.In this case, competitor's selector 1134 selects to have the WRAN of the shortest SCW use period as the competitor.In addition, if discerned a plurality of groups different SCW normal modes, and idle SCW time slot periodically occurs at least one SCW normal mode, and then competitor's selector 1134 selects the competitor to use the idle SCW time slot of at least one group.In addition, competitor's selector 1134 reports that to keeping out of the way timer 1136 selected competitors send the time started of the SCW time slot of CBP bag.
When sending the CBP bag and when carrying out contention when obtaining the SCW time slot, keep out of the way the 1136 generation random back times of timer and determine whether to have passed through the random back time.That is, when carrying out contention and obtaining the SCW time slot, keep out of the way timer 1136 and generate the random back time, and determine whether to have passed through the random back time in the time started that the competitor sends the SCW time slot of CBP bag.After obtaining the SCW time slot, keep out of the way timer 1136 and use pattern according to the SCW that determines by pattern configurations device 1138, generate the random back time in the time started of the SCW time slot that sends the CBP bag, and determine whether to have passed through the random back time.
Promptly, CBP controller 1130 control model analyzers 1132 are analyzed the SCW normal mode of adjacent WRAN, control competitor selector 1134 is selected the competitor, and control is kept out of the way timer 1136 and generated the random back time, and control model configurator 1138 configuration SCW use pattern.In this case, carry out the processing that configuration SCW uses pattern by the situation of distinguishing the new access channel of CBP bag transmit leg and the situation that idle SCW time slot behind access channel, occurs.
At first, when the new access channel of CBP bag transmit leg, pattern analyzer 1132, competitor's selector 1134, keep out of the way timer 1136 and pattern configurations device 1138 as described below interworking to obtain the SCW time slot and to send the CBP bag.
When the operation by spectral sensor 1102 and band controller 1104 inserted new channel, CBP controller 1130 control model analyzers 1132 were to analyze the SCW normal mode of adjacent WRAN.If CBP bag transmit leg is UE, then CBP controller 1130 is to BS report analysis result.That is, though not shown, UE also comprises the message builder that generates message, and described message is used to report the analysis result that provides from CBP controller 1130.Otherwise if CBP bag transmit leg is BS, then CBP controller 1130 combines the analysis result of BS with the analysis result of reporting from UE.That is, though not shown, BS also comprises message analysis device, and it is estimated from the analysis result of UE report by using from the message of UE reception, and provides analysis result to CBP controller 1130.If WRAN uses pattern information by using its SCW of CBP bag transmission, then CBP controller 1130 wraps the SCW use pattern of estimating the WRAN that sends the CBP bag by analyzing CBP, and analyzes the SCW that is estimated and use pattern.
If the idle SCW slot cycle of the presentation of results ground that obtains by sign SCW normal mode occurs, then CBP controller 1130 control model configurators 1138 configuration SCW use patterns make the period of idle SCW time slot use the period consistent with its SCW.Otherwise if idle SCW time slot does not periodically occur, then CBP controller 1130 control competitor selectors 1134 select the competitor to keep out of the way timer 1136 is used for contention with generation the random back time to obtain SCW time slot and control.
After this, if receive competitor's CBP bag before having passed through the random back time from the time started that the competitor sends the SCW time slot of CBP bag, then its contentions failure of CBP controller 1130 identifications, thus control competitor selector 1134 is reselected the competitor.In this case, can reselect identical competitor.Otherwise, if do not receive competitor's CBP bag, then CBP controller 1130 control CBP makers 1118 output CBP bags before having passed through the random back time from the time started that the competitor sends the SCW time slot of CBP bag.Therefore, it wins contention 1130 identifications of CBP controller, is the twice of competitor's SCW use period thereby control model configurator 1138 configuration SCW use patterns make its SCW use the period.As a result, CBP bag transmit leg and competitor share the SCW time slot.
After this, when using pattern according to determined SCW, CBP wraps transmitting time then, and 1130 controls of CBP controller are kept out of the way timer 1136 and generated the random back times.When having passed through random back during the time, CBP controller 1130 order CBP makers 1118 output CBP bags.In this case, if passing through random back received different WRAN before the time CBP bag, then its contentions failure of CBP controller 1130 identifications, thus control model configurator 1138 uses the period to double current SCW.
Then, when discharging WRAN or when different WRAN take the SCW time slot that is taken by the WRAN that is discharged, just occurring the situation of idle SCW time slot from channel, analyzer 1132, competitor's selector 1134, keep out of the way timer 1136 and pattern configurations device 1138 as described below interworking wrap to obtain the SCW time slot and to send CBP.
In the state that periodically takies the SCW time slot, CBP controller 1130 control model analyzers 1132 continue to analyze the SCW normal mode.If CBP bag transmit leg is UE, then CBP controller 1130 is to BS report analysis result.That is, though not shown, UE also comprises the message builder that generates message, and wherein message is used to report the analysis result that provides from CBP controller 1130.Otherwise if CBP bag transmit leg is BS, then CBP controller 1130 combines the analysis result of BS with the analysis result of reporting from UE.That is, though not shown, BS also comprises message analysis device, and it provides analysis result by using the message estimation that receives from UE from the analysis result of UE report and to CBP controller 1130.
If the idle SCW time slot of presentation of results that obtains by sign SCW normal mode periodically occurs, then CBP controller 1130 determines whether the appearance period of idle SCW time slot is shorter than its SCW and uses the period.If the appearance period of idle SCW time slot is shorter than its SCW and uses the period, then CBP controller 1130 is used to take the contention of idle SCW time slot by execution, determines to use period to change over the appearance period of idle SCW time slot its SCW, and discharges its SCW time slot.Otherwise if the appearance period of idle SCW time slot is used the period more than or equal to its SCW, then CBP controller 1130 determines its SCW uses the combination of the pattern of pattern and the idle SCW time slot of generation whether to constitute a period.Use constituting a period of pattern and the pattern that generates idle SCW time slot if determine its SCW of presentation of results, then CBP controller 1130 determines not only to use the current SCW time slot that occupies also to use idle SCW time slot.In this case, no longer give back the SCW time slot.
Subsequently, 1130 controls of CBP controller are kept out of the way timer 1136 is used for contention with generation the random back time.After this, if before the time started random back from idle SCW time slot goes by, receive competitor's CBP bag, then its contention failure of CBP controller 1130 identifications, and the SCW that recovers to use before the contention uses the period.Otherwise if do not receive competitor's CBP bag before the time started random back from idle SCW time slot goes by, then CBP controller 1130 control CBP makers 1118 output CBP wrap.Therefore, it wins contention 1130 identifications of CBP controller, thereby control model configurator 1138 its SCW of configuration use pattern to comprise the pattern that generates idle SCW time slot.If given back the SCW time slot in this case, then CBP controller 1130 its SCW of configuration use pattern with identical with the pattern that generates idle SCW time slot.Otherwise if also do not give back the SCW time slot, then CBP controller 1130 uses the combination of the pattern of pattern and the idle SCW time slot of generation to be defined as new SCW its SCW and uses pattern.
According to one exemplary embodiment of the present invention, in wireless communication system, select suitable competitor by analyzing adjacent WRAN based on CR, the WRAN of contention failure increases SCW and uses the period.Therefore, can the reliable SCW normal mode of configuration height, avoided the conflict in the CBP bag simultaneously.
Though illustrated and illustrated the present invention with reference to its one exemplary embodiment, but it will be appreciated by those skilled in the art that, only otherwise break away from, can make various variations in form and details as claims and the spirit and scope of the present invention that equivalent limited thereof.
Claims (28)
1. one kind in the method based on the operation coexistence beacon protocol CBP in the wireless communication system of cognitive radio CR bag reflector, and described method comprises:
Identify adjacent wireless area network WRAN from coexistence window SCW normal mode;
If idle SCW time slot does not periodically occur, then from described adjacent WRAN, select WRAN as the competitor;
In the SCW time slot that takies by described WRAN, carry out the contention that is used to send the CBP bag with described competitor; And
When winning described contention, it is the twice of described competitor's SCW use period that configuration SCW use pattern makes the SCW of CBP bag transmit leg use the period.
2. one kind is sending the equipment that coexistence beacon protocol CBP wraps based on being used in the wireless communication system of cognitive radio CR, and described equipment comprises:
Analyzer, be used to identify adjacent wireless area network WRAN from coexistence window SCW normal mode;
Selector does not periodically occur if be used for idle SCW, then selects WRAN as the competitor from described adjacent WRAN;
Controller, be used in the SCW time slot that takies by described WRAN, execution and described competitor's the contention that is used to send the CBP bag, and when winning described contention, be used to dispose SCW use pattern and make that the SCW use period of CBP bag transmit leg is the twice of described competitor's SCW use period.
3. method according to claim 1 or equipment according to claim 2, wherein said competitor has the WRAN that the shortest SCW uses the period in described adjacent WRAN.
4. method according to claim 1 or equipment according to claim 2, if wherein identified a plurality of groups different SCW normal mode, and idle SCW time slot is periodically appearing at least one of described SCW normal mode, then selects described competitor to use the idle SCW time slot of described at least one group.
5. method according to claim 1 or equipment according to claim 2, wherein by the described contention of following execution:
Send time started of the SCW time slot of CBP bag described competitor, generate the random back time that is used for described competitor's contention;
When receiving described CBP bag from described competitor before, pass through described random back during the time, sent the CBP bag; And
Determine to win described contention.
6. method according to claim 5 also comprises:
Before going by, receive CBP when bag, determine described contention failure from described competitor in described random back; And
Reselect described competitor.
7. equipment according to claim 5 wherein received CBP when bag from described competitor before going by in described random back, described controller is determined described contention failure, and reselects described competitor.
8. according to claim 1,3,4,5 and 6 a wherein any described method, also comprise:
After the described SCW use pattern of configuration, when being used to send CBP contention failure bag and another WRAN, use the period to double described SCW.
9. according to claim 1,3,4,5,6 and 8 a wherein any described method, also comprise:
If idle SCW time slot periodically occurs, then change SCW use pattern by taking at least one idle SCW time slot.
10. according to claim 2,3,4,5 and 7 a wherein any described equipment, wherein after the described SCW use pattern of configuration, when being used to send CBP contention failure bag and another WRAN, described controller uses the period to double described SCW.
11. according to claim 2,3,4,5,7 and 10 a wherein any described equipment, if wherein idle SCW time slot periodically occurs, then described controller changes SCW and uses pattern by taking at least one idle SCW time slot.
12. according to the method for claim 9 or according to the equipment of claim 11, wherein said SCW uses pattern by with the change of getting off:
Whether the appearance period of determining described idle SCW time slot is shorter than the described SCW use period that described CBP wraps transmit leg, and described SCW uses the combination of the appearance pattern of pattern and described idle SCW time slot whether to constitute the single period;
Generate the random back time to take described idle SCW time slot in the time started of described idle SCW time slot;
When receiving the CBP bag from another WRAN before, pass through described random back during the time, sent described CBP bag; And
The SCW that disposes described CBP bag transmit leg uses pattern to comprise the appearance pattern of described idle SCW time slot.
13. method according to claim 12 also comprises:
If the appearance period of described idle SCW time slot is shorter than the SCW of described CBP bag transmit leg and uses the period, then discharge the SCW time slot of described CBP bag transmit leg.
14. method according to claim 12 also comprises:
If before described random back goes by, receive the CBP bag from another WRAN, the SCW that then recovers to use before the described contention uses pattern.
15. equipment according to claim 12 uses the period if the appearance period of wherein described idle SCW time slot is shorter than the SCW of described CBP bag transmit leg, then described controller discharges the SCW time slot of described CBP bag transmit leg.
16. equipment according to claim 12, if wherein received the CBP bag from described another WRAN before described random back goes by, the SCW that then described controller recovers to use before the described contention uses pattern.
17. according to claim 1,3,4,5,6,8,9,12,13 and 14 an any described method or wherein according to claim 2,3,4,5,6,7,10,11,12,15 and 16 a wherein described equipment arbitrarily, wherein said CBP comprises that SCW uses pattern information, and
In addition, wherein said SCW use pattern information comprises at least one in first parameter and second parameter, the type of the wherein said first parameter pointing-type information, and described second parameter represents that with the form of the type of described pattern information described SCW uses pattern.
18. according to claim 1,3,4,5,6,8,9,12,13,14 and 17 an any described method or wherein according to claim 2,3,4,5,6,7,10,11,12,15,16 and 17 a wherein described equipment arbitrarily, wherein said second parameter comprises that described SCW uses one of them of position of the value of period of pattern and direct next SCW time slot, and
In addition, wherein said position comprises the skew from current time slots to the time slot that will send next CBP bag.
19. according to claim 1,3,4,5,6,8,9,12,13,14,17 and 18 an any described method or wherein according to claim 2,3,4,5,6,7,10,11,12,15,16,17 and 18 a wherein described equipment arbitrarily, wherein use each of pattern information, identify described SCW normal mode by the SCW that reads the adjacent WRAN that from the CBP bag that adjacent WRAN receives, comprises.
20. the wherein any described method according to claim 18 and 19 also comprises:
Transmission comprises that described SCW uses the CBP bag of pattern information.
21. the wherein any described equipment according to claim 18 and 19 also comprises:
Described controller control comprises that with transmission described SCW uses the CBP bag of pattern information.
22. according to claim 1,3,4,5,6,8,9,12,13,14,17,18,19 and 20 a wherein any described method or according to claim 2,3,4,5,6,7,10,11,12,15,16,17,18,19 and 21 a wherein described equipment arbitrarily, wherein said CBP comprises and relating to from coexisting the information of algorithm, and wherein said information from the algorithm that coexists comprises at least one in position, sensing result, progress msg and the alternate channel tabulation of base station BS.
23. described according to claim 1,3,4,5,6,8,9,12,13,14,17,18,19,20 and 22 a wherein any described method, also comprise:
Before the SCW normal mode of the described adjacent WRAN of sign, search for the untapped channel of authorized system; And
Insert the untapped described channel of authorized system.
24., also comprise the result who sends the SCW normal mode of the described adjacent WRAN of sign to BS according to claim 1,3,4,5,6,8,9,12,13,14,17,18,19,20,22 and 23 a wherein any described method.
25., also comprise the SCW normal mode of reception by the described adjacent WRAN of at least one user equipment (UE) sign according to claim 1,3,4,5,6,8,9,12,13,14,17,18,19,20,22,23 and 24 a wherein any described method.
26., also comprise according to claim 2,3,4,5,6,7,10,11,12,15,16,17,18,19,21 and 22 a wherein any described equipment:
Transducer is used for searching for the untapped channel of authorized system before the SCW normal mode of the described adjacent WRAN of sign,
Wherein said controller control is to insert the untapped described channel of authorized system.
27., also comprise according to claim 2,3,4,5,6,7,10,11,12,15,16,17,18,19,21,22 and 26 a wherein any described equipment:
Reflector is used for sending to BS the result of the SCW normal mode of the described adjacent WRAN of sign.
28., also comprise according to claim 2,3,4,5,6,7,10,11,12,15,16,17,18,19,21,22 and 27 a wherein any described equipment:
Receiver is used to receive the SCW normal mode by the described adjacent WRAN of at least one user equipment (UE) sign.
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| KR20080103433A KR101485553B1 (en) | 2008-07-14 | 2008-10-22 | Apparatus and method for transmitting coexistance beacon protocol packet in a congnitive radio broadband wireless communication system |
| PCT/KR2009/003856 WO2010008177A2 (en) | 2008-07-14 | 2009-07-14 | Apparatus and method for transmitting coexistence beacon protocol packet in cognitive radio based wireless communication system |
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| CN103947260A (en) * | 2011-09-19 | 2014-07-23 | 高通股份有限公司 | Method and apparatus for channel discovery in cognitive radio communications |
| US9801117B2 (en) | 2011-09-19 | 2017-10-24 | Qualcomm Incorporated | Method and apparatus for channel discovery in cognitive radio communications |
| CN103947260B (en) * | 2011-09-19 | 2018-04-27 | 高通股份有限公司 | The method and apparatus found for the channel in cognition wireless telecommunication |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102100016B (en) | 2014-09-17 |
| KR101485553B1 (en) | 2015-01-23 |
| RU2011101356A (en) | 2012-07-20 |
| RU2517369C2 (en) | 2014-05-27 |
| KR20100007675A (en) | 2010-01-22 |
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