WO2010069250A1 - 感知无线电系统的分簇方法、设备及系统 - Google Patents

感知无线电系统的分簇方法、设备及系统 Download PDF

Info

Publication number
WO2010069250A1
WO2010069250A1 PCT/CN2009/075633 CN2009075633W WO2010069250A1 WO 2010069250 A1 WO2010069250 A1 WO 2010069250A1 CN 2009075633 W CN2009075633 W CN 2009075633W WO 2010069250 A1 WO2010069250 A1 WO 2010069250A1
Authority
WO
WIPO (PCT)
Prior art keywords
client
user
clustering
base station
measurement
Prior art date
Application number
PCT/CN2009/075633
Other languages
English (en)
French (fr)
Inventor
吕林军
伍天宇
刘坚熊
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2010069250A1 publication Critical patent/WO2010069250A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/06—Testing, supervising or monitoring using simulated traffic

Definitions

  • Clustering method, device and system for cognitive radio system The application is filed on December 16, 2008, the Chinese Patent Office, application number 200810179285. 4, the invention name is "clustering method, device and system of cognitive radio system" Priority of Chinese Patent Application, the entire contents of which is incorporated herein by reference.
  • the present invention relates to the field of wireless communication technologies, and in particular, to a clustering method, device, and system for a cognitive radio system. Background technique
  • Bifurcation is a solution to reduce overhead and redundancy in the implementation of the coexistence mechanism of the CR system (Cognitive Radio System).
  • CR system Recognition Radio System
  • all clients must perceive the channel in the sensing period and report the sensing result to the BS (base station). If the clients in the CR system are clustered, then only each cluster is in the cluster. A client or some clients report the perceived result to the BS, which can reduce the channel overhead of reporting the perceived result.
  • the current clustering scheme is to broadcast a measurement message of a certain power to the client through the BS, and the client returns the strength of the received measurement message to the BS, and the BS performs clustering according to the information fed back by the client.
  • the BS will Clients with similar measurement strengths are divided into the same cluster, that is, clients with similar perception results are divided into the same cluster. After the clustering is completed, the BS will consider the perceived result of one of the clients in the cluster as the perceived result of the entire cluster.
  • the inventor has found that at least the following problems exist in the prior art:
  • the prior art cannot divide the cluster according to the space in which the client is located; if one is added in the area where the first user system is already stored a second user system, and the existing first user system is a small and medium-sized coverage area, which is affected by the first user system, and the sense of the client in the second user system Knowing the results may be as follows: Similar client-aware results are not similar, and some distant clients may have similar perceived results. Summary of the invention
  • Embodiments of the present invention provide a clustering method, device, and system for a cognitive radio system, which are capable of clustering clients in a system according to a space in which they are located.
  • a clustering method for a cognitive radio system comprising:
  • a client that includes:
  • a receiving unit configured to receive a measurement request message sent by the base station
  • a judging unit configured to determine whether the client itself belongs to an existing cluster or belongs to an existing cluster
  • a sending unit configured to return a rejection determination response to the base station when the client itself belongs to an existing cluster or belongs to an existing cluster
  • the broadcast unit is configured to broadcast the clustered beacon message when the client itself does not belong to an existing cluster or an existing cluster.
  • a client that includes:
  • a receiving unit configured to receive a clustered beacon message broadcasted by the client as the measurement user after receiving the measurement request message of the base station;
  • a processing unit configured to determine, according to the received power of the clustered beacon message, a clustering result of the client, where the clustering result indicates that the client belongs to the same cluster or represents the client as the measurement user Belongs to the same cluster as the client that determines the user;
  • a sending unit configured to return the clustering result to the base station.
  • a cognitive radio system comprising a base station and a client, at least one client serving as a measurement user;
  • the base station sends a measurement request message to the client as the measurement user; and receives the rejection measurement response returned by the client as the measurement user, or receives the clustering result returned by the client that is not the measurement user;
  • the client as the measurement user receives the measurement request message, and determines whether the client itself belongs to an existing cluster or belongs to an existing cluster; if the client itself belongs to an existing cluster or belongs to an existing cluster Field, returning the rejection response to the base station; otherwise broadcasting the clustered beacon message;
  • the score The cluster result indicates that the client belongs to the same cluster as the client of the measurement user or belongs to the same cluster of the client as the measurement user.
  • the clustering method, device and system for the cognitive radio system provided by the embodiment of the present invention broadcasts the clustered beacon message by using the client as the measurement user, and then receives the power division of the clustered beacon message according to other clients. Clustering, and returning the clustering result to the base station, so that the client close to the client as the measuring user will be divided into the same cluster, and the farther client will be due to the received clustering letter.
  • the standard message power is not matched to the requirements and is divided into different clusters, that is, the spatial separation when the client is clustered is completed, so that the clients in the system can be divided according to the space in which they are located.
  • the base station broadcasts the clustered beacon message in the embodiment
  • the second user system needs to be added in the area where the first user system already exists, the first user system is in the near space for the second user system.
  • the impact of the client is similar, which avoids the situation where the similar client receives the clustered beacon message power is not similar, and also reduces the distance
  • the possibility that the power of the clustered beacon message is similar between the remote clients is received, so that the clustering of the second user system is more reasonable.
  • FIG. 1 is a flowchart of a clustering method performed by a base station according to Embodiment 1 of the present invention
  • Embodiment 2 is a flowchart of determining a clustering method performed by a user in Embodiment 1 of the present invention
  • FIG. 3 is a flowchart of a method for clustering performed by a non-measurement user according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic diagram of a principle of a base station according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic diagram of a principle of a client as a measurement user according to Embodiment 1 of the present invention
  • FIG. 6 is a schematic diagram of a client that is not used as a measurement user according to Embodiment 1 of the present invention
  • FIG. 7 is a schematic diagram of a cognitive radio system according to Embodiment 1 of the present invention.
  • FIG. 8 is a flowchart of a clustering method performed by a base station according to Embodiment 2 of the present invention.
  • Embodiment 9 is a flowchart of determining a clustering method performed by a user in Embodiment 2 of the present invention.
  • FIG. 10 is a flowchart of a method for clustering performed by a non-measurement user according to Embodiment 2 of the present invention
  • FIG. 11 is a schematic diagram of a principle of a base station according to Embodiment 2 of the present invention.
  • FIG. 12 is a schematic diagram of a principle of a client as a measurement user according to Embodiment 2 of the present invention
  • FIG. 13 is a schematic diagram of a client that is not used as a measurement user in Embodiment 2 of the present invention
  • FIG. 14 is a schematic diagram of a cognitive radio system according to Embodiment 3 of the present invention
  • Flow chart of the clustering method
  • Figure 15 is a graph of the relationship between false alarm and missed detection.
  • This embodiment provides a clustering method for a cognitive radio system performed by a base station. As shown in FIG. 1, the method includes the following steps:
  • the base station sends a measurement request message to the client that is the measurement user.
  • the client that is the measurement user is a clustered center, that is, a cluster head.
  • the processing result is returned to the base station.
  • the base station may receive the rejection measurement response returned by the client as the measurement user, and may also receive the determination of the inaction.
  • the clustering result returned by the client of the user the clustering result indicating that the corresponding client belongs to the same cluster as the client of the measurement user or the domain in which the corresponding client belongs to the same cluster as the client of the measurement user.
  • the embodiment further provides a clustering method for determining a cognitive radio system performed by a user.
  • the measurement user is a client. As shown in FIG. 2, the method includes the following steps:
  • the client that is the measurement user receives the measurement request message sent by the base station.
  • the client determines whether the client itself belongs to an existing cluster or belongs to an existing cluster. If the client belongs to an existing cluster or belongs to an existing cluster, step 203 is performed; If the data does not belong to an existing cluster or an existing cluster, step 204 is performed.
  • the client that is the measurement user returns a rejection measurement response to the base station.
  • the client as the measurement user broadcasts the clustered beacon message to the client around it, so as to provide the basis for other clusters that are not used as the measurement user.
  • the embodiment also provides a clustering method for the cognitive radio system. As shown in FIG. 3, the method includes the following steps:
  • the client that is not the measurement user receives the cluster as the client broadcast of the measurement user. Beacon message. After broadcasting the clustered beacon message as the client of the measurement user, the client close to the measurement user can generally receive the clustered beacon message.
  • the clustering result of the client can be determined according to the power of the received clustered beacon message, and the clustering result can reflect the spatial distribution of the client.
  • the clustering results include: The client belongs to the same cluster as the measurement user (generally represented by binary 01), and the client belongs to the domain (generally represented by binary 11) that determines the cluster to which the user belongs.
  • the clustering result needs to be returned to the base station.
  • the client that receives the clustered beacon message whose power is too small or does not receive the clustered beacon message may not return any message to the base station.
  • the embodiment provides a base station implementing the above method.
  • the base station includes: a transmitting unit 41 and a receiving unit 42.
  • the sending unit 41 is configured to send a measurement request message to the client that is the measurement user.
  • the receiving unit 42 is configured to receive the rejection measurement response returned by the client that is the measurement user, or receive the cluster return that is not returned by the client that measures the user.
  • the clustering result indicates that the corresponding client belongs to the same cluster as the client of the measurement user or the domain in which the corresponding client belongs to the same cluster as the client of the measurement user.
  • the embodiment provides a client as a measurement user.
  • the client includes: a receiving unit 51, a determining unit 52, and a sending unit 53. And broadcast unit 54.
  • the receiving unit 51 is configured to receive the measurement request message sent by the base station; the determining unit 52 is configured to determine whether the client itself belongs to an existing cluster or belongs to an existing clustered domain; the sending unit 53 is configured to belong to the existing segment in the client itself. When a cluster or a domain that belongs to an existing cluster is returned to the base station
  • the broadcast unit 54 is configured to broadcast the clustered beacon message when the client itself does not belong to an existing cluster or an existing cluster.
  • this embodiment provides a client that does not serve as a measurement user.
  • the client includes: a receiving unit 61, a processing unit 62, and a sending unit. 63.
  • the receiving unit 61 is configured to receive a clustered beacon message broadcasted as a client of the measurement user. Since each client is different from the measured user, the client that is far away from the measured user receives less power of the clustered beacon message, and the client that is closer to the measured user receives the clustered beacon message. The power will be larger. Therefore, the processing unit 62 is configured to determine a clustering result of the client according to the received power of the clustered beacon message, and the clustering result can reflect the spatial distribution of the client. The transmitting unit 63 is configured to return the clustering result to the base station.
  • the base station and the two clients described above can form a cognitive radio system.
  • the system includes a base station 71 and a client (72, 73, 74), and at least one client is used as a measurement user.
  • the client 72 is a measurement user.
  • the base station 71 sends a measurement request message to the client 72 as the measurement user; the client 72 as the measurement user receives the measurement request message, and determines whether the client 72 itself belongs to an existing cluster or belongs to an existing point.
  • the domain of the cluster if the client 72 itself belongs to an existing cluster or belongs to an existing clustered domain, returns a rejection determination response to the base station 71; otherwise, broadcasts the clustered beacon message; not as a client for determining the user (73, 74) receiving the clustered beacon message, determining a clustering result of the client (73, 74) according to the received power of the clustered beacon message, and returning the clustering result to the base station 71,
  • the clustering result indicates that the client (73, 74) belongs to the same cluster as the client of the measurement user or belongs to the same cluster of the client as the measurement user.
  • the base station 71 receives the rejection determination response returned by the client 72 as the measurement user, or receives the clustering result returned by the client (73, 74
  • the client 75 that is far from the user 72 is not returned to the client for clustering.
  • the system finally divides the clients 72, 73, and 74 into one cluster, and the client 75 is divided into a cluster.
  • the clustering method, device and system for the cognitive radio system provided by the embodiment of the present invention broadcasts the clustered beacon message by using the client as the measurement user, and then receives the power division of the clustered beacon message according to other clients. Clustering, and returning the clustering result to the base station, so that the client close to the client as the measuring user will be divided into the same cluster, and the farther client will be due to the received clustering letter.
  • the standard message power is not matched to the requirements and is divided into different clusters, that is, the spatial separation when the client is clustered is completed, so that the client in the system can be divided according to the space in which it is located.
  • the base station broadcasts the clustered beacon message in the embodiment
  • the second user system needs to be added in the area where the first user system already exists, the first user system is in the near space for the second user system.
  • the impact of the client is similar, avoiding the similarity of the power of the clustered beacon messages received by similar clients, and reducing the power of receiving the clustered beacon messages between the clients that are far apart. The possibility of making the clustering of the second user system more reasonable.
  • a clustering method for a cognitive radio system includes the following steps:
  • the base station sends a measurement request message to the client that is the measurement user.
  • the client that is the measurement user is a clustered center, that is, a cluster head.
  • the client as the measurement user may be a client randomly selected by the base station, and the client does not belong to an existing cluster or an existing cluster.
  • the client as the measurement user in this embodiment may also be a pre-assigned client, so that the base station only needs to sequentially select from all the allocated clients.
  • the cluster head or other client After the corresponding processing by the cluster head and other clients, the cluster head or other client The processing result is returned to the base station.
  • the base station may receive the rejection measurement response returned by the client as the measurement user, and may also receive the clustering result returned by the client that is not the measurement user, and the clustering result indicates The corresponding client belongs to the same cluster as the client of the measurement user or the domain in which the corresponding client belongs to the same cluster as the client of the measurement user.
  • step 803 If a rejection response is received, step 803 is performed; if a clustering result is received, step 804 is performed.
  • the user returns a location information to the base station.
  • the clustering result of the selected measurement user is updated according to the returned location information. Since the randomly selected client cannot be used as the measurement user, the user needs to be reselected. A client is used as the measurement user, so the process returns to step 801.
  • the base station Since the client that cannot be used as the measurement user in the process has returned a location information, the base station will not select the client to locate the user again, and avoid selecting the client that cannot be used as the measurement user again.
  • step 804 Determine whether there is a client that is not clustered in the vicinity of the base station, if yes, execute step 801, if not, end the process.
  • the embodiment further provides a clustering method for determining a cognitive radio system performed by a user.
  • the measurement user is a client. As shown in FIG. 9, the method includes the following steps:
  • the client that is the measurement user receives the measurement request message sent by the base station.
  • the client determines whether the client itself belongs to an existing cluster or belongs to an existing cluster. If the client belongs to an existing cluster or belongs to an existing cluster, step 903 is performed. If it does not belong to the existing cluster or the existing cluster, then step 904 is performed.
  • the client that is the measurement user returns a rejection response response to the base station, and sends the location information of the client itself to the base station.
  • the clustering result of the client may be used as the location information.
  • the client as the measurement user broadcasts the clustered beacon message to other surrounding clients, so as to provide a basis for dividing the cluster for other clients that do not measure the user.
  • the embodiment also provides a clustering method for the cognitive radio system. As shown in FIG. 10, the method includes the following steps:
  • a client that is not a measurement user receives a cluster beacon message that is broadcast as a client of the measurement user. After the clustered beacon message is broadcasted by the client as the measurement user, the client close to the measurement user can generally receive the clustered beacon message.
  • 1002 Determine whether the received power of the clustered beacon message Pk is greater than the clustering threshold Pthl ; if Pk is greater than Pthl , perform step 1003 ; otherwise, perform step 1005.
  • power P k clustering beacon message determines whether the received is greater than the power of all cluster beacon message of the client has been received; if P k is larger than the client has received all cluster beacons The power of the message is executed in step 1004, otherwise the process ends.
  • step 1007 Determine that the clustering result of the client is that the client belongs to the same cluster as the client that is the measurement user, and step 1007 is performed.
  • step 1005. Determine whether the received power of the clustered beacon message P k is greater than the clustering domain threshold P th2 ; if P k is greater than P th2 ; then execute step 1006; otherwise, the process ends.
  • P thl is a threshold for controlling the cluster size
  • P th2 is a threshold for controlling the minimum distance from the measurement user, so P thl > P th2 .
  • the client that has determined the clustering result returns the clustering result to the base station.
  • no message may be returned to the base station.
  • the embodiment provides a base station.
  • the base station includes: a transmitting unit 1 11 and a receiving unit 112.
  • the sending unit 1 11 is configured to send a measurement request message to the client that is the measurement user.
  • the client that is the measurement user can be obtained as follows:
  • the base station is a randomly selected client, but must satisfy the selected client that does not belong to an existing cluster or an existing cluster.
  • the pre-assigned client so that the base station only needs to be selected sequentially from all the allocated clients.
  • the receiving unit 112 in this embodiment is configured to receive a rejection determination response returned by the client as the measurement user, or receive a clustering result returned by the client that is not the measurement user, and the clustering result indicates that the corresponding client belongs to the measurement user.
  • the client is in the same cluster or indicates that the corresponding client belongs to the same cluster as the client of the measurement user.
  • the transmitting unit 111 transmits a measurement request message to the other client as the measurement user.
  • the embodiment provides a client as a measurement user.
  • the client includes: a receiving unit 121, a determining unit 122, and a sending unit 123. And broadcast unit 124.
  • the receiving unit 121 is configured to receive the measurement request message sent by the base station; the determining unit 122 is configured to determine whether the client itself belongs to an existing cluster or belongs to an existing clustered domain; the sending unit 123 is configured to belong to the existing segment in the client itself. When the cluster or the domain that belongs to the existing cluster is returned to the base station, the response to the base station is returned. At the same time, the sending unit 123 needs to send the location information of the client itself to the base station, and generally uses the clustering result of the client itself as the location information.
  • the broadcast unit 124 is configured to broadcast the clustered beacon message when the client itself does not belong to an existing cluster or an existing cluster.
  • this embodiment provides a client that is not used as a measurement user.
  • the client includes: a receiving unit 1 31. Processing unit 1 32 and transmitting unit 1 33.
  • the receiving unit 1 31 is configured to receive a clustered beacon message as a client broadcast of the measurement user. Since each client is different from the measured user, the client that is far away from the measured user receives less power of the clustered beacon message, and the client that is closer to the measured user receives the clustered beacon message. The power will be larger. Therefore, the processing unit 1 32 is configured to determine a clustering result of the client according to the received power of the clustered beacon message, and the clustering result can reflect the spatial distribution of the client. The transmitting unit 1 33 is configured to return the clustering result to the base station.
  • the foregoing processing unit 1 32 is implemented by the following modules: a first judging module 1 321 , a second judging module 1 322 , a third judging module 1 323 , and a processing module 1 324 .
  • the first determining module 1 321 is configured to determine whether the power P k of the received clustered beacon message is greater than the clustering threshold value P th1 .
  • the second determining module 1 322 is configured to determine whether the power P k of the received clustered beacon message is greater than the power of all the clustered beacon messages that the client has received; The power of the received clustered beacon message is greater than the power of all the clustered beacon messages that the client has received, and the processing module 1 324 determines that the clustering result of the client is the client and the client as the measuring user. The ends belong to the same cluster.
  • the third determining module 1 323 is configured to determine whether the power of the received clustered beacon message is greater than a clustering domain threshold P th2 ; if P k is greater than P th2 , The processing module 1 324 determines that the clustering result of the client is the domain in which the client belongs to the cluster to which the client as the measurement user belongs.
  • the clients provided in Figures 12 and 13 can form a perceptual radio system, wherein the client functions provided in Figures 12 and 13 can be implemented on the same client entity.
  • a clustering method, device, and system for a cognitive radio system broadcasts a clustered beacon message by using a client as a measurement user, and then receives according to other clients.
  • the power of the clustered beacon message is divided into clusters, and the clustering result is returned to the base station, so that the client close to the client as the measurement user will be divided into the same cluster, and the distance is far apart.
  • the client will be divided into different clusters due to the non-conformity of the received clustered beacon message power, that is, the space separation when the client is clustered is completed, so that the client in the system can follow the location Space division clustering.
  • the base station broadcasts the clustered beacon message in the embodiment
  • the second user system needs to be added in the area where the first user system already exists, the first user system is in the near space for the second user system.
  • the impact of the client is similar, avoiding the similarity of the power of the clustered beacon messages received by similar clients, and reducing the power of receiving the clustered beacon messages between the clients that are far apart. The possibility of making the clustering of the second user system more reasonable.
  • This embodiment describes the process of the entire clustering method in detail with reference to the accompanying drawings.
  • the present embodiment is mainly applied to a cognitive radio system, which includes a base station and a client, and the base station selects at least one client from all clients as the measurement user.
  • the specific clustering process is as follows:
  • the base station sends a measurement request message to the client that is the measurement user, and the client that is the measurement user is a clustered center, that is, a cluster head.
  • the client After receiving the measurement request message sent by the base station, the client determines whether the client itself belongs to an existing cluster or belongs to an existing cluster; if the client itself belongs to an existing cluster or belongs to If there is already a clustered domain, step 1403 is performed; if the client itself does not belong to the existing cluster and does not belong to the existing clustered domain, step 1404 is performed.
  • the client as the measurement user returns a rejection response response to the base station, and sends the location information of the client itself to the base station.
  • the clustering result of the client is used as the location information, and 1411 is performed.
  • the client as the measurement user broadcasts the clustered beacon message to other surrounding clients, so as to provide the basis for other clustering clients that do not serve as the measurement user, and executes 1405. 1405.
  • the client close to the measurement user can generally receive the clustered beacon message.
  • the client that is not the measurement user receives the clustered beacon message as the client broadcast of the measurement user, it is determined whether the power P k of the received clustered beacon message is greater than the clustering threshold value P thl ; if P k If it is greater than P thl , step 1406 is performed; otherwise, step 1408 is performed.
  • the client determines whether the power Pk of the received clustered beacon message is greater than the power of all the clustered beacon messages that the client has received; if Pk is greater than all the points that the client has received The power of the cluster beacon message is then executed in step 1407, otherwise the process ends.
  • step 1407. Determine that the clustering result of the client is that the client belongs to the same cluster as the client that is the measurement user, and step 141 0 is performed.
  • the client determines whether the received power of the clustered beacon message Pk is greater than a clustering domain threshold Pth2 ; if Pk is greater than Pth2 ; then step 1409 is performed; otherwise, the process ends.
  • P thl is a threshold for controlling the cluster size
  • P th2 is a threshold for controlling the minimum distance from the measurement user, so P thl > P th2 .
  • the client that has determined the clustering result returns the clustering result to the base station.
  • no message may be returned to the base station.
  • the base station receives the returned message, and after the corresponding processing by the cluster head and other clients, the cluster head or other client finally returns the processing result to the base station.
  • the base station may receive the measured user.
  • the client rejects the measurement response, and may also receive the clustering result returned by the client that is not the measurement user.
  • the clustering result indicates that the corresponding client belongs to the same cluster as the client of the measurement user or that the corresponding client belongs to As the field of determining the same cluster of clients' clients.
  • step 1412 is performed; if a clustering result is received, Then step 141 3 is performed.
  • the determining user returns a location information to the base station.
  • the base station updates the clustering result of the selected measurement user according to the returned location information. Since the randomly selected client cannot be used as the measurement user, the user needs to reselect. A client is used as the measurement user, so the process returns to step 1401.
  • the base station Since the client that cannot be used as the measurement user in the process has returned a location information, the base station will not select the client to locate the user again, and avoid selecting the client that cannot be used as the measurement user again.
  • the base station determines whether there are any clients that are not clustered in the vicinity, and if so, executes step 1401, and if not, ends the process.
  • the client served by the base station can be divided into a plurality of clusters, and the clustered beacon message is broadcasted by the client as the measurement user, and then the score is received according to other clients.
  • the power of the cluster beacon message is divided into clusters, and the clustering result is returned to the base station, so that the client close to the client as the measurement user will be divided into the same cluster, and the clients that are far apart will Because the received clustered beacon message power is not consistent with the requirements, it is divided into different clusters, that is, the spatial separation when the client is clustered is completed, so that the client in the system can be divided according to the space in which the client is located. cluster.
  • the base station broadcasts the clustered beacon message in the embodiment
  • the second user system needs to be added in the area where the first user system already exists, the first user system is in the near space for the second user system.
  • the impact of the client is similar, avoiding the similarity of the power of the clustered beacon messages received by similar clients, and reducing the power of receiving the clustered beacon messages between the clients that are far apart. The possibility of making the clustering of the second user system more reasonable.
  • the client in the wireless communication system is clustered, which can increase the sensing sensitivity, and the analysis is as follows:
  • the probability of k users reporting 1 is: (C -0.9 m -0.1 (5 - m) € N k -_ m s - A k - m - .9 (N - s - k+ m) )
  • the embodiments of the present invention are mainly used in various wireless communication systems with sensing functions, such as a RAN (802.22 Wireless Local Area Network) system, a CDMA (Code Division Multiple Access) system, and the like.
  • the embodiment of the invention also The clustering of the client may be performed in the case where a second user system is added to the area where the first user system already exists.
  • the present invention can be implemented by means of software plus necessary general hardware, and of course, by hardware, but in many cases, the former is a better implementation. .
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer.
  • a hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Description

感知无线电系统的分簇方法、 设备及系统 本申请要求于 2008 年 12 月 16 日提交中国专利局、 申请号为 200810179285. 4、 发明名称为 "感知无线电系统的分簇方法、 设备及系统" 的中国专利申请的优先权， 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信技术领域， 尤其涉及感知无线电系统的分簇方法、 设备及系统。 背景技术
分褒是 CR系统 ( Cogni t ive rad io sys tem, 感知无线电系统）在执行 共存机制过程中减少开销和冗余的解决方案。 在没有分簇的 CR系统中， 所 有的客户端必须在感知周期中感知信道并将感知结果上报给 BS (基站）， 如 果将 CR系统中的客户端进行分簇， 那么每个分簇内只有一个客户端或者一 些客户端向 BS上报感知结果， 能够减少上报感知结果的信道开销。
目前的分簇方案是通过 BS向客户端广播一定功率的测量消息， 客户端 将接收测量消息的强弱程度返回给 BS ,由 BS根据客户端反馈的信息进行分 簇， 一般来说， BS将接收测量消息强弱程度相近的客户端划分为同一个分 簇， 即： 具有相似感知结果的客户端被分到同一个分簇。 在分簇完成之后， BS 将考虑把分簇内的其中一个客户端的感知结果作为整个分簇的感知结 果。
在实现上述分簇方案的过程中， 发明人发现现有技术中至少存在如下 问题： 现有技术不能根据客户端所处的空间划分分簇； 如果在已经存第一 用户系统的区域内增加一个第二用户系统， 并且已有的第一用户系统为中 小型的覆盖区域， 受到第一用户系统的影响， 第二用户系统中客户端的感 知结果可能出现如下情况： 相近的客户端感知结果并不相近， 而一些相距 较远的客户端之间可能有一些相似的感知结果。 发明内容
本发明的实施例提供一种感知无线电系统的分簇方法、 设备及系统， 能够将系统中的客户端按照其所处空间划分分簇。
为达到上述目的， 本发明的实施例采用如下技术方案：
一种感知无线电系统的分簇方法， 包括：
接收作为测定用户的客户端在收到基站的测定请求消息后广播的分簇 信标消息；
根据所接收到的分簇信标消息的功率确定该客户端的分簇结果， 该分 簇结果表示属于作为测定用户的客户端同一分簇或者表示属于作为测定用 户的客户端同一分簇的领域；
向基站返回所述的分簇结果。
一种客户端， 包括：
接收单元， 用于接收基站发送的测定请求消息；
判断单元， 用于判断客户端本身是否属于已有分簇或者属于已有分簇 的领域；
发送单元， 用于在客户端本身属于已有分簇或者属于已有分簇的领域 时， 向基站返回拒绝测定响应；
广播单元， 用于在客户端本身不属于已有分簇也不属于已有分簇的领 域时， 广播分簇信标消息。
一种客户端， 包括：
接收单元， 用于接收作为测定用户的客户端在收到基站的测定请求消 息后广播的分簇信标消息；
处理单元， 用于根据所接收到的分簇信标消息的功率确定该客户端的 分簇结果， 该分簇结果表示属于作为测定用户的客户端同一分簇或者表示 属于作为测定用户的客户端同一分簇的领域；
发送单元， 用于向基站返回所述的分簇结果。
一种感知无线电系统， 包括基站和客户端， 至少一个客户端为作为测 定用户；
所述基站向作为测定用户的客户端发送测定请求消息； 并接收作为测 定用户的客户端返回的拒绝测定响应， 或者接收不作为测定用户的客户端 返回的分簇结果；
所述作为测定用户的客户端接收所述测定请求消息， 并判断客户端本 身是否属于已有分簇或者属于已有分簇的领域； 若客户端本身属于已有分 簇或者属于已有分簇的领域， 则向基站返回拒绝测定响应； 否则广播分簇 信标消息；
不作为测定用户的客户端接收所述的分簇信标消息， 根据所接收到的 分簇信标消息的功率确定该客户端的分簇结果， 并向基站返回所述的分簇 结果， 该分簇结果表示该客户端属于作为测定用户的客户端同一分簇或者 属于作为测定用户的客户端同一分簇的领域。
本发明实施例提供的感知无线电系统的分簇方法、 设备及系统， 通过 作为测定用户的客户端来广播分簇信标消息， 然后根据其他的客户端接收 所述分簇信标消息的功率划分分簇， 并将分簇结果返回给基站， 这样， 与 作为测定用户的客户端接近的客户端将会被划分到同一个分簇， 而相距较 远的客户端将由于接收到的分簇信标消息功率的不符合要求而被划分到不 同的分簇， 即完成了对客户端分簇时的空间分离， 使得系统中的客户端能 够按照其所处空间划分分簇。
同时， 由于本实施例中并没有采用基站广播分簇信标消息， 若需要在 已经存在第一用户系统的区域内增加一个第二用户系统， 第一用户系统对 于第二用户系统中处于接近空间的客户端产生的影响也是相近的， 避免了 相近的客户端接收到分簇信标消息功率不相近的情况发生， 也减少了相距 较远的客户端之间接收到分簇信标消息功率相近的可能性， 从而使得第二 用户系统的分簇更加合理。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对 实施例或现有技术描述中所需要使用的附图作简单地介绍， 显而易见地， 下面描述中的附图仅仅是本发明的一些实施例， 对于本领域普通技术人员 来讲， 在不付出创造性劳动性的前提下， 还可以根据这些附图获得其他的 附图。
图 1为本发明实施例 1中基站执行的分簇方法流程图；
图 2为本发明实施例 1中测定用户执行的分簇方法流程图；
图 3为本发明实施例 1中非测定用户执行的分簇方法流程图； 图 4为本发明实施例 1中基站的原理示意图；
图 5为本发明实施例 1中作为测定用户的客户端的原理示意图； 图 6为本发明实施例 1中不作为测定用户的客户端的原理示意图； 图 7为本发明实施例 1中感知无线电系统的原理图；
图 8为本发明实施例 2中基站执行的分簇方法流程图；
图 9为本发明实施例 2中测定用户执行的分簇方法流程图；
图 10为本发明实施例 2中非测定用户执行的分簇方法流程图； 图 11为本发明实施例 2中基站的原理示意图；
图 12为本发明实施例 2中作为测定用户的客户端的原理示意图； 图 1 3为本发明实施例 2中不作为测定用户的客户端的原理示意图； 图 14为本发明实施例 3中感知无线电系统的分簇方法的流程图； 图 15为虚警和漏检的关系曲线图。 具体实施方式
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进 行清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没 有作出创造性劳动前提下所获得的所有其他实施例， 都属于本发明保护的 范围。
实施例 1:
本实施例提供一种由基站执行的感知无线电系统的分簇方法， 如图 1 所示， 该方法包括如下步骤：
101、 基站向作为测定用户的客户端发送测定请求消息， 这个作为测定 用户的客户端为一个分簇的中心， 即： 簇头。
102、 在由簇头和其他客户端进行相应的处理后向基站返回处理结果， 在本实施例中， 基站可能接收到作为测定用户的客户端返回的拒绝测定响 应， 也可能接收到不作为测定用户的客户端返回的分簇结果， 该分簇结果 表示对应客户端属于作为测定用户的客户端同一分簇或者表示对应客户端 属于作为测定用户的客户端同一分簇的领域。
本实施例还提供一种由测定用户执行的感知无线电系统的分簇方法， 该测定用户为一个客户端， 如图 2所示， 该方法包括如下步骤：
201、 作为测定用户的客户端接收基站发送的测定请求消息。
202、 该客户端判断客户端本身是否属于已有分簇或者属于已有分簇的 领域； 如果客户端本身属于已有分簇或者属于已有分簇的领域， 则执行步 骤 203; 如果客户端本身不属于已有分簇也不属于已有分簇的领域， 则执行 步骤 204。
203、 作为测定用户的客户端向基站返回拒绝测定响应。
204、 作为测定用户的客户端向其周边的客户端广播分簇信标消息， 以 便为其他不作为测定用户的客户端提供划分分簇的依据。
对于不作为测定用户的客户端， 本实施例也提供一种感知无线电系统 的分簇方法， 如图 3所示， 该方法包括如下步骤：
301、 不作为测定用户的客户端接收作为测定用户的客户端广播的分簇 信标消息。 在作为测定用户的客户端广播分簇信标消息后， 靠近测定用户 的客户端， 一般能够接收到分簇信标消息。
302、 由于各个客户端距离测定用户的距离不同， 与测定用户相距较远 的客户端接收到分簇信标消息的功率会较小， 而与测定用户相距较近的客 户端接收到分簇信标消息的功率会大一些。 故而， 本步骤中可以根据所接 收到的分簇信标消息的功率确定该客户端的分簇结果， 这样的分簇结果能 够体现客户端在空间上的分布情况。 分簇结果包括： 该客户端与测定用户 属于同一个分簇（一般以二进制 01 表示）、 该客户端属于测定用户所属分 簇的领域 (一般以二进制 11表示）。
303、 如果某一客户端得出了上述分簇结果的其中一个， 需要向基站返 回所述的分簇结果。 对于接收到分簇信标消息的功率过小或者没有接收到 分簇信标消息的客户端， 本实施例中可以不用向基站返回任何消息。
对应于图 1 所描述的感知无线电系统的分簇方法， 本实施例提供一种 实施上述方法的基站， 如图 4所示， 该基站包括： 发送单元 41和接收单元 42。
其中， 发送单元 41用于向作为测定用户的客户端发送测定请求消息； 接收单元 42用于接收作为测定用户的客户端返回的拒绝测定响应， 或者接 收不作为测定用户的客户端返回的分簇结果， 该分簇结果表示对应客户端 属于作为测定用户的客户端同一分簇或者表示对应客户端属于作为测定用 户的客户端同一分簇的领域。
对应于图 2 所描述的感知无线电系统的分簇方法， 本实施例提供一种 作为测定用户的客户端， 如图 5所示， 该客户端包括： 接收单元 51、 判断 单元 52、 发送单元 53和广播单元 54。
接收单元 51用于接收基站发送的测定请求消息； 判断单元 52用于判 断客户端本身是否属于已有分簇或者属于已有分簇的领域； 发送单元 53用 于在客户端本身属于已有分簇或者属于已有分簇的领域时， 向基站返回拒 绝测定响应； 广播单元 54用于在客户端本身不属于已有分簇也不属于已有 分簇的领域时， 广播分簇信标消息。
对应于图 3 所描述的感知无线电系统的分簇方法， 本实施例提供一种 不作为测定用户的客户端， 如图 6所示， 该客户端包括： 接收单元 61、 处 理单元 62和发送单元 63。
接收单元 61用于接收作为测定用户的客户端广播的分簇信标消息。 由 于各个客户端距离测定用户的距离不同， 与测定用户相距较远的客户端接 收到分簇信标消息的功率会较小， 而与测定用户相距较近的客户端接收到 分簇信标消息的功率会大一些。 故而， 所述处理单元 62用于根据所接收到 的分簇信标消息的功率确定该客户端的分簇结果， 这样的分簇结果能够体 现客户端在空间上的分布情况。 发送单元 63用于向基站返回所述的分簇结 果。
通过以上描述的基站以及两种客户端可以组成一个感知无线电系统， 如图 7所示， 该系统包括基站 71和客户端 （72、 73、 74 ), 并且有至少一 个客户端为作为测定用户， 本实施例中假设客户端 72为测定用户。
所述基站 71向作为测定用户的客户端 72发送测定请求消息； 所述作 为测定用户的客户端 72接收所述测定请求消息， 并判断客户端 72本身是 否属于已有分簇或者属于已有分簇的领域； 若客户端 72本身属于已有分簇 或者属于已有分簇的领域， 则向基站 71返回拒绝测定响应； 否则广播分簇 信标消息； 不作为测定用户的客户端 （73、 74 )接收所述的分簇信标消息， 根据所接收到的分簇信标消息的功率确定该客户端（73、 74 ) 的分簇结果， 并向基站 71返回所述的分簇结果， 该分簇结果表示该客户端 （73、 74 )属 于作为测定用户的客户端同一分簇或者属于作为测定用户的客户端同一分 簇的领域。 所述基站 71接收作为测定用户的客户端 72返回的拒绝测定响 应， 或者接收不作为测定用户的客户端 （73、 74 )返回的分簇结果。
本实施例中距离测定用户 72较远的客户端 75不会向客户端返回分簇 结果， 所以该系统最后会将客户端 72、 73和 74划分为一个分簇， 而将客 户端 75单独划分为一个分簇。
本发明实施例提供的感知无线电系统的分簇方法、 设备及系统， 通过 作为测定用户的客户端来广播分簇信标消息， 然后根据其他的客户端接收 所述分簇信标消息的功率划分分簇， 并将分簇结果返回给基站， 这样， 与 作为测定用户的客户端接近的客户端将会被划分到同一个分簇， 而相距较 远的客户端将由于接收到的分簇信标消息功率不符合要求而被划分到不同 的分簇， 即完成了对客户端分簇时的空间分离， 使得系统中的客户端能够 按照其所处空间划分分簇。
同时， 由于本实施例中并没有采用基站广播分簇信标消息， 若需要在 已经存在第一用户系统的区域内增加一个第二用户系统， 第一用户系统对 于第二用户系统中处于接近空间的客户端产生的影响也是相近的， 避免了 相近的客户端接收到分簇信标消息功率不相近的情况发生， 也减少了相距 较远的客户端之间接收到分簇信标消息功率相近的可能性， 从而使得第二 用户系统的分簇更加合理。
实施例 2:
本实施例一种感知无线电系统的分簇方法， 如图 8 所示， 该方法包括 如下步骤：
801、 基站向作为测定用户的客户端发送测定请求消息， 这个作为测定 用户的客户端为一个分簇的中心， 即： 簇头。
本实施例中作为测定用户的客户端可以是基站随机选择的客户端， 所 述客户端不属于已有分簇也不属于已有分簇的领域。
作为另一种可实现方案， 本实施例中作为测定用户的客户端还可以是 预先分配的客户端， 这样基站只需要从所有已分配好的客户端中顺序选择 即可。
802、 在由簇头和其他客户端进行相应的处理后， 簇头或者其他客户端 向基站返回处理结果， 在本实施例中， 基站可能接收到作为测定用户的客 户端返回的拒绝测定响应， 也可能接收到不作为测定用户的客户端返回的 分簇结果， 该分簇结果表示对应客户端属于作为测定用户的客户端同一分 簇或者表示对应客户端属于作为测定用户的客户端同一分簇的领域。
如果接收到拒绝测定响应， 则执行步骤 803; 如果接收到分簇结果， 则 执行步骤 804。
803、 一般该测定用户会向基站返回一个位置信息， 本步骤就是根据返 回的位置信息更新所选的测定用户的分簇结果， 由于本次随机选择的客户 端不能作为测定用户， 所以需要重新选择一个客户端来作为测定用户， 故 而返回执行步骤 801。
由于本过程中不能作为测定用户的客户端已经返回一个位置信息， 这 样基站就不会再次将该客户端选定位测定用户， 避免再次选择到不能作为 测定用户的客户端。
804、 判断基站的附近是否有没有分簇的客户端， 如果有则执行步骤 801 , 如果没有则结束流程。
本实施例还提供一种由测定用户执行的感知无线电系统的分簇方法， 该测定用户为一个客户端， 如图 9所示， 该方法包括如下步骤：
901、 作为测定用户的客户端接收基站发送的测定请求消息。
902、 该客户端判断客户端本身是否属于已有分簇或者属于已有分簇的 领域； 如果客户端本身属于已有分簇或者属于已有分簇的领域， 则执行步 骤 903; 如果客户端本身不属于已有分簇也不属于已有分簇的领域， 则执行 步骤 904。
903、 作为测定用户的客户端向基站返回拒绝测定响应， 并向基站发送 客户端本身的位置信息， 一般可以以该客户端的分簇结果作为其位置信息。
904、 作为测定用户的客户端向周边其他的客户端广播分簇信标消息， 以便为其他不作为测定用户的客户端提供划分分簇的依据。 对于不作为测定用户的客户端， 本实施例也提供一种感知无线电系统 的分簇方法， 如图 10所示， 该方法包括如下步骤：
1001、 不作为测定用户的客户端接收作为测定用户的客户端广播的分 簇信标消息。 在作为测定用户的客户端广播分簇信标消息后， 靠近测定用 户的客户端， 一般能够接收到分簇信标消息。
1002、判断所接收到的分簇信标消息的功率 Pk是否大于分簇门限值 Pthl; 如果 Pk大于 Pthl , 则执行步骤 1 003; 否则执行步骤 1005。
1003、 判断所接收到的分簇信标消息的功率 Pk是否大于该客户端已经 接收到的所有分簇信标消息的功率； 若 Pk大于该客户端已经接收到的所有 分簇信标消息的功率， 则执行步骤 1004 , 否则结束流程。
1004、 确定该客户端的分簇结果为该客户端与作为测定用户的客户端 属于同一分簇， 并执行步骤 1007。
1005、 判断所接收到的分簇信标消息的功率 Pk是否大于分簇领域门限 值 Pth2; 如果 Pk大于 Pth2; 则执行步骤 1006 , 否则结束流程。
上述 Pthl 是控制分簇大小的门限， Pth2是控制与测定用户相距的最小 距离的门限， 所以 Pthl > Pth2。
1006、 确定该客户端的分簇结果为该客户端属于作为测定用户的客户 端所属分簇的领域， 并执行步骤 1007。
1007、 已经确定出分簇结果的客户端向基站返回所述的分簇结果。 本 实施例中对于接收到分簇信标消息的功率过小或者没有接收到分簇信标消 息的客户端， 本实施例中可以不用向基站返回任何消息。
上述步骤 1002至步骤 1004是完成客户端的具体所属分簇的确认， 而 步骤 1005至步骤 1006是确定客户端属于某个分簇的领域， 一般情况下， 通过步骤 1002至步骤 1004即可完成基本的划分分簇的要求， 而步骤 1005 至步骤 1006是为了进一步地使得划分分簇过程中可能漏掉的客户端能够有 具体的分簇结果。 对应于图 8 所描述的感知无线电系统的分簇方法， 本实施例提供一种 基站， 如图 11所示， 该基站包括： 发送单元 1 11和接收单元 112。
其中发送单元 1 11 用于向作为测定用户的客户端发送测定请求消息， 本实施例中作为测定用户的客户端可以通过如下方式得到：
第一、 基站为随机选择的客户端， 但必须满足所选的客户端不属于已 有分簇也不属于已有分簇的领域。
第二、 预先分配的客户端， 这样基站只需要从所有已分配好的客户端 中顺序选择即可。
本实施例中的接收单元 112 用于接收作为测定用户的客户端返回的拒 绝测定响应， 或者接收不作为测定用户的客户端返回的分簇结果， 该分簇 结果表示对应客户端属于作为测定用户的客户端同一分簇或者表示对应客 户端属于作为测定用户的客户端同一分簇的领域。 在接收完拒绝测定响应 或者分簇结果后， 由发送单元 111 向其他作为测定用户的客户端发送测定 请求消息。
对应于图 9 所描述的感知无线电系统的分簇方法， 本实施例提供一种 作为测定用户的客户端， 如图 12所示， 该客户端包括： 接收单元 121、 判 断单元 122、 发送单元 123和广播单元 124。
接收单元 121用于接收基站发送的测定请求消息； 判断单元 122用于 判断客户端本身是否属于已有分簇或者属于已有分簇的领域；发送单元 123 用于在客户端本身属于已有分簇或者属于已有分簇的领域时， 向基站返回 拒绝测定响应， 同时， 发送单元 123还需要向基站发送客户端本身的位置 信息， 一般可以用该客户端本身的分簇结果作为其位置信息； 广播单元 124 用于在客户端本身不属于已有分簇也不属于已有分簇的领域时， 广播分簇 信标消息。
对应于图 10所描述的感知无线电系统的分簇方法， 本实施例提供一种 不作为测定用户的客户端， 如图 1 3所示， 该客户端包括： 接收单元 1 31、 处理单元 1 32和发送单元 1 33。
接收单元 1 31 用于接收作为测定用户的客户端广播的分簇信标消息。 由于各个客户端距离测定用户的距离不同， 与测定用户相距较远的客户端 接收到分簇信标消息的功率会较小， 而与测定用户相距较近的客户端接收 到分簇信标消息的功率会大一些。 故而， 所述处理单元 1 32 用于根据所接 收到的分簇信标消息的功率确定该客户端的分簇结果， 这样的分簇结果能 够体现客户端在空间上的分布情况。 发送单元 1 33用于向基站返回所述的 分簇结果。
上述的处理单元 1 32通过如下模块实现包括： 第一判断模块 1 321、 第 二判断模块 1 322、 第三判断模块 1 323和处理模块 1 324。
第一判断模块 1 321用于判断所接收到的分簇信标消息的功率 Pk是否大 于分簇门限值 Pthl。
在 Pk大于 Pthl时， 第二判断模块 1 322用于判断所接收到的分簇信标消 息的功率 Pk是否大于该客户端已经接收到的所有分簇信标消息的功率； 如 果所接收到的分簇信标消息的功率大于该客户端已经接收到的所有分簇信 标消息的功率， 所述处理模块 1 324确定该客户端的分簇结果为该客户端与 作为测定用户的客户端属于同一分簇。
在 Pk小于或等于 Pthl时， 第三判断模块 1 323用于判断所接收到的分簇 信标消息的功率是否大于分簇领域门限值 Pth2; 如果 Pk大于 Pth2 , 所述处理 模块 1 324确定该客户端的分簇结果为该客户端属于作为测定用户的客户端 所属分簇的领域。
上述图 11提供的基站， 图 12和图 1 3提供的客户端可以组成一个感知 无线电系统， 其中， 图 12和图 1 3提供的客户端功能可以在同一个客户端 实体上实现。
本发明实施例提供的感知无线电系统的分簇方法、 设备及系统， 通过 作为测定用户的客户端来广播分簇信标消息， 然后根据其他的客户端接收 所述分簇信标消息的功率划分分簇， 并将分簇结果返回给基站， 这样， 与 作为测定用户的客户端接近的客户端将会被划分到同一个分簇， 而相距较 远的客户端将由于接收到的分簇信标消息功率的不符合要求而被划分到不 同的分簇， 即完成了对客户端分簇时的空间分离， 使得系统中的客户端能 够按照其所处空间划分分簇。
同时， 由于本实施例中并没有采用基站广播分簇信标消息， 若需要在 已经存在第一用户系统的区域内增加一个第二用户系统， 第一用户系统对 于第二用户系统中处于接近空间的客户端产生的影响也是相近的， 避免了 相近的客户端接收到分簇信标消息功率不相近的情况发生， 也减少了相距 较远的客户端之间接收到分簇信标消息功率相近的可能性， 从而使得第二 用户系统的分簇更加合理。
实施例 3:
本实施例结合附图具体说明整个分簇方法的过程， 本实施例主要应用 于感知无线电系统， 该系统包括基站和客户端， 并且基站从所有客户端中 选出至少一个客户端作为测定用户。 如图 14所示， 具体的分簇流程如下：
1401、 基站向作为测定用户的客户端发送测定请求消息， 这个作为测 定用户的客户端为一个分簇的中心， 即： 簇头。
1402、 作为测定用户的客户端接收基站发送的测定请求消息后， 该客 户端判断客户端本身是否属于已有分簇或者属于已有分簇的领域； 如果客 户端本身属于已有分簇或者属于已有分簇的领域， 则执行步骤 1403; 如果 客户端本身不属于已有分簇也不属于已有分簇的领域， 则执行步骤 1404。
1403、 作为测定用户的客户端向基站返回拒绝测定响应， 并向基站发 送客户端本身的位置信息， 一般可以以该客户端的分簇结果作为其位置信 息， 并执行 1411。
1404、 作为测定用户的客户端向周边其他的客户端广播分簇信标消息， 以便为其他不作为测定用户的客户端提供划分分簇的依据， 并执行 1405。 1405、 在作为测定用户的客户端广播分簇信标消息后， 靠近测定用户 的客户端， 一般能够接收到分簇信标消息。 不作为测定用户的客户端接收 作为测定用户的客户端广播的分簇信标消息后， 判断所接收到的分簇信标 消息的功率 Pk是否大于分簇门限值 Pthl;如果 Pk大于 Pthl ,则执行步骤 1406 ; 否则执行步骤 1408。
1406、 该客户端判断所接收到的分簇信标消息的功率 Pk是否大于该客 户端已经接收到的所有分簇信标消息的功率； 若 Pk大于该客户端已经接收 到的所有分簇信标消息的功率， 则执行步骤 1407 , 否则结束流程。
1407、 确定该客户端的分簇结果为该客户端与作为测定用户的客户端 属于同一分簇， 并执行步骤 141 0。
1408、 该客户端判断所接收到的分簇信标消息的功率 Pk是否大于分簇 领域门限值 Pth2; 如果 Pk大于 Pth2; 则执行步骤 1409 , 否则结束流程。
上述 Pthl 是控制分簇大小的门限， Pth2是控制与测定用户相距的最小 距离的门限， 所以 Pthl > Pth2。
1409、 确定该客户端的分簇结果为该客户端属于作为测定用户的客户 端所属分簇的领域， 并执行步骤 1410。
1410、 已经确定出分簇结果的客户端向基站返回所述的分簇结果。 本 实施例中对于接收到分簇信标消息的功率过小或者没有接收到分簇信标消 息的客户端， 本实施例中可以不用向基站返回任何消息。
1411、 基站接收返回的消息， 在由簇头和其他客户端进行相应的处理 后， 最后会由簇头或者其他客户端向基站返回处理结果， 在本实施例中， 基站可能接收到作为测定用户的客户端返回的拒绝测定响应， 也可能接收 到不作为测定用户的客户端返回的分簇结果， 该分簇结果表示对应客户端 属于作为测定用户的客户端同一分簇或者表示对应客户端属于作为测定用 户的客户端同一分簇的领域。
如果接收到拒绝测定响应， 则执行步骤 1412 ; 如果接收到分簇结果， 则执行步骤 141 3。
1412、 该测定用户会向基站返回一个位置信息， 本步骤就是基站根据 返回的位置信息更新所选的测定用户的分簇结果， 由于本次随机选择的客 户端不能作为测定用户， 所以需要重新选择一个客户端来作为测定用户， 故而返回执行步骤 1401。
由于本过程中不能作为测定用户的客户端已经返回一个位置信息， 这 样基站就不会再次将该客户端选定位测定用户， 避免再次选择到不能作为 测定用户的客户端。
141 3、 基站判断其附近是否还有没有分簇的客户端， 如果有则执行步 骤 1401 , 如果没有则结束流程。
通过图 14所描述的分簇过程， 可以将基站所服务的客户端分成多个分 簇， 并且由作为测定用户的客户端来广播分簇信标消息， 然后根据其他的 客户端接收所述分簇信标消息的功率划分分簇， 并将分簇结果返回给基站， 这样， 与作为测定用户的客户端接近的客户端将会被划分到同一个分簇， 而相距较远的客户端将由于接收到的分簇信标消息功率的不符合要求而被 划分到不同的分簇， 即完成了对客户端分簇时的空间分离， 使得系统中的 客户端能够按照其所处空间划分分簇。
同时， 由于本实施例中并没有采用基站广播分簇信标消息， 若需要在 已经存在第一用户系统的区域内增加一个第二用户系统， 第一用户系统对 于第二用户系统中处于接近空间的客户端产生的影响也是相近的， 避免了 相近的客户端接收到分簇信标消息功率不相近的情况发生， 也减少了相距 较远的客户端之间接收到分簇信标消息功率相近的可能性， 从而使得第二 用户系统的分簇更加合理。
本发明实施例中对无线通信系统中的客户端进行了分簇， 这样可以增 加感知灵敏度， 举例分析如下：
考虑在一个已经存在第一用户系统的小区内建立一个第二用户系统； 并且第二用户系统中有 N个用户属于 K个分簇。 对第二用户系统中的每个 用户， 假定其感知能力为： 虚警概率： Pf =0.1; 漏测概率： Pm=0.1。
我们考虑一个融合从第二用户系统中不同用户的感知结果的方法： 如 果上报 1 (1表示存在已有业务系统， 即第一用户系统） 的用户个数大于门 限 Th, BS判决存在第一用户系统， 否则判决没有第一用户系统。 下面分析 进行分簇和不进行分簇的两种情况下， 上报 1的概率：
情况 1: 在进行分簇情形下：
存在第一用户系统时， k个用户报 1的概率为： P(k) = Cs k · 0.9k · 0.1(s- "； 不存在第一用户 务系统时， k 个用户报 1 的概率为： P(k) = Cs k ·0.1* ·0.9(ί_ί)„ 情况 2: 在不进行分簇情形下：
存在第一用户系统时， k个用户报 1的概率为： (C -0.9m -0.1(5-m)€N k-_m s - Ak-m- .9(N-s-k+m))
Figure imgf000018_0001
不存在第一用户系统时， k个用户报 1的概率为： P(k = CN k '(Uk ·0.9(Ν- 如果上述取值为： N=20, K=4, S=5; 对于进行分簇情形下， 当 Pm= 0.1, 可以得出 Pf = 4.6*10— 4； 对进行分簇情形下， 当 Pm = 0.1, 可以得出 Pf = 0.04。
如果上述取值为： N=100， K=10, S=10, 可以得到如图 15 所示的仿真 结果。 从图 15的两条曲线可以看出， 在进行分簇的情况下， 漏检和虚警的 概率都相对较低， 并且是比不进行分簇是的概率低一半以下。
本发明实施例主要用在各种具有感知功能的无线通信系统，例如： RAN ( 802.22无线区域网） 系统、 CDMA (码分多址） 系统等。 本发明实施例还 可以用于在已经存在第一用户系统的区域内增加一个第二用户系统的情况 下， 进行客户端的分簇划分。
通过以上的实施方式的描述， 所属领域的技术人员可以清楚地了解到 本发明可借助软件加必需的通用硬件的方式来实现， 当然也可以通过硬件， 但很多情况下前者是更佳的实施方式。 基于这样的理解， 本发明的技术方 案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出 来， 该计算机软件产品存储在可读取的存储介质中， 如计算机的软盘， 硬 盘或光盘等， 包括若干指令用以使得一台计算机设备（可以是个人计算机， 服务器， 或者网络设备等）执行本发明各个实施例所述的方法。 以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并不局 限于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可 轻易想到变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明 的保护范围应所述以权利要求的保护范围为准。

Claims

权利要求
1、 一种感知无线电系统的分簇方法， 其特征在于， 包括：
接收分簇信标消息， 所述分簇信标消息由作为测定用户的客户端在收 到基站的测定请求消息后广播；
根据所接收到的分簇信标消息的功率确定该客户端的分簇结果， 该分 簇结果表示属于作为测定用户的客户端同一分簇或者表示属于作为测定用 户的客户端同一分簇的领域；
向基站返回所述分簇结果。
2、 根据权利要求 1所述的感知无线电系统的分簇方法， 其特征在于， 所述作为测定用户的客户端为基站随机选择的客户端； 或者所述作为测定 用户的客户端为基站预先分配的客户端。
3、 根据权利要求 2所述的感知无线电系统的分簇方法， 其特征在于， 若作为测定用户的客户端为基站随机选择的客户端， 则该客户端在接收基 站发送的测定请求消息后， 判断客户端本身是否属于已有分簇或者属于已 有分簇的领域；
若作为测定用户的客户端本身不属于已有分簇或者属于已有分簇的领 域， 则广播所述的分簇信标消息。
4、 根据权利要求 3所述的感知无线电系统的分簇方法， 其特征在于， 若作为测定用户的客户端本身属于已有分簇或者属于已有分簇的领域， 则 向基站返回拒绝测定响应； 并向基站发送客户端本身的位置信息。
5、 根据权利要求 1所述的感知无线电系统的分簇方法， 其特征在于， 根据所接收到的分簇信标消息的功率确定该客户端的分簇结果包括：
判断所接收到的分簇信标消息的功率是否大于分簇门限值；
若所接收到的分簇信标消息的功率大于分簇门限值， 则判断所接收到 的分簇信标消息的功率是否大于该客户端已经接收到的所有分簇信标消息 的功率； 若所接收到的分簇信标消息的功率大于该客户端已经接收到的所有分 簇信标消息的功率， 则确定该客户端的分簇结果为该客户端与作为测定用 户的客户端属于同一分簇。
6、 根据权利要求 5所述的感知无线电系统的分簇方法， 其特征在于， 根据所接收到的分簇信标消息的功率确定该客户端的分簇结果还包括： 若所接收到的分簇信标消息的功率小于或等于分簇门限值 , 则判断所 接收到的分簇信标消息的功率是否大于分簇领域门限值；
若所接收到的分簇信标消息的功率大于分簇领域门限值， 则确定该客 户端的分簇结果为该客户端属于作为测定用户的客户端所属分簇的领域。
7、 一种客户端， 其特征在于， 包括：
接收单元， 用于接收基站发送的测定请求消息；
判断单元， 用于判断客户端本身是否属于已有分簇或者属于已有分簇 的领域；
发送单元， 用于在客户端本身属于已有分簇或者属于已有分簇的领域 时， 向基站返回拒绝测定响应；
广播单元， 用于在客户端本身不属于已有分簇也不属于已有分簇的领 域时， 广播分簇信标消息。
8、 根据权利要求 7所述的客户端， 其特征在于， 所述发送单元还用于 在客户端本身属于已有分簇或者属于已有分簇的领域时， 向基站发送客户 端本身的位置信息。
9、 一种客户端， 其特征在于， 包括：
接收单元， 用于接收作为测定用户的客户端在收到基站的测定请求消 息后广播的分簇信标消息；
处理单元， 用于根据所接收到的分簇信标消息的功率确定该客户端的 分簇结果， 该分簇结果表示属于作为测定用户的客户端同一分簇或者表示 属于作为测定用户的客户端同一分簇的领域； 发送单元， 用于向基站返回所述的分簇结果。
10、 根据权利要求 9所述的客户端， 其特征在于， 所述处理单元包括： 第一判断模块， 用于判断所接收到的分簇信标消息的功率是否大于分 簇门限值；
第二判断模块， 用于在所接收到的分簇信标消息的功率大于分簇门限 值时， 判断所接收到的分簇信标消息的功率是否大于该客户端已经接收到 的所有分簇信标消息的功率；
处理模块， 用于在所接收到的分簇信标消息的功率大于该客户端已经 接收到的所有分簇信标消息的功率时， 确定该客户端的分簇结果为该客户 端与作为测定用户的客户端属于同一分簇。
11、 根据权利要求 10所述的客户端， 其特征在于， 所述处理单元还包 括：
第三判断模块， 用于在所接收到的分簇信标消息的功率小于或等于分 簇门限值时， 判断所接收到的分簇信标消息的功率是否大于分簇领域门限 值；
所述处理模块还用于在所接收到的分簇信标消息的功率大于分簇领域 门限值时， 确定该客户端的分簇结果为该客户端属于作为测定用户的客户 端所属分簇的领域。
12、 一种感知无线电系统， 包括基站和客户端， 其特征在于， 至少一 个客户端为作为测定用户；
所述基站向作为测定用户的客户端发送测定请求消息； 并接收不作为 测定用户的客户端返回的分簇结果；
所述作为测定用户的客户端接收所述测定请求消息， 并判断客户端本 身是否属于已有分簇或者属于已有分簇的领域； 若客户端本身不属于已有 分簇或者属于已有分簇的领域， 则广播分簇信标消息；
不作为测定用户的客户端接收所述的分簇信标消息， 根据所接收到的 分簇信标消息的功率确定该客户端的分簇结果， 并向基站返回所述分簇结 果， 该分簇结果表示该客户端属于作为测定用户的客户端同一分簇或者属 于作为测定用户的客户端同一分簇的领域。
1 3、 一种感知无线电系统的分簇方法， 其特征在于， 包括：
作为测定用户的客户端接收基站发送的测定请求消息；
所述客户端向其周围的客户端广播分簇信标消息， 用于其周围的客户 端根据接收到的所述分簇信标消息的功率确定并向基站反馈各客户端的分 簇结果。
14、 如权利要求 1 3所述的分簇方法， 其特征在于， 包括：
所述作为测定用户的客户端为基站随机选择的客户端； 或者所述作为 测定用户的客户端为基站预先分配的客户端。
15、根据权利要求 14所述的感知无线电系统的分簇方法，其特征在于， 若作为测定用户的客户端为基站随机选择的客户端， 则该客户端在接收基 站发送的测定请求消息后， 判断客户端本身是否属于已有分簇或者属于已 有分簇的领域；
若作为测定用户的客户端本身不属于已有分簇或者属于已有分簇的领 域， 则广播所述的分簇信标消息。
16、 根据权利要求 15所述的感知无线电系统的分簇方法， 其特征在于， 若作为测定用户的客户端本身属于已有分簇或者属于已有分簇的领域， 则 向基站返回拒绝测定响应； 并向基站发送客户端本身的位置信息。
17、 一种感知无线电系统， 包括基站和客户端， 其特征在于， 至少一 个客户端为作为测定用户；
所述基站向作为测定用户的客户端发送测定请求消息； 并接收不作为 测定用户的客户端返回的分簇结果；
所述作为测定用户的客户端接收所述测定请求消息， 向不作为测定用 户的客户端广播分簇信标消息； 不作为测定用户的客户端接收所述的分簇信标消息， 根据所接收到的 分簇信标消息的功率确定该客户端的分簇结果， 并向基站返回所述分簇结 果， 该分簇结果表示该客户端属于作为测定用户的客户端同一分簇或者属 于作为测定用户的客户端同一分簇的领域。
PCT/CN2009/075633 2008-12-16 2009-12-16 感知无线电系统的分簇方法、设备及系统 WO2010069250A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200810179285.4A CN101753226B (zh) 2008-12-16 2008-12-16 感知无线电系统的分簇方法、设备及系统
CN200810179285.4 2008-12-16

Publications (1)

Publication Number Publication Date
WO2010069250A1 true WO2010069250A1 (zh) 2010-06-24

Family

ID=42268321

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2009/075633 WO2010069250A1 (zh) 2008-12-16 2009-12-16 感知无线电系统的分簇方法、设备及系统

Country Status (2)

Country Link
CN (1) CN101753226B (zh)
WO (1) WO2010069250A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103298115B (zh) 2012-02-27 2015-10-14 电信科学技术研究院 一种基站及进行tdd基站上下行子帧配置的方法
CN102647720B (zh) * 2012-04-27 2014-10-22 中国科学院上海微系统与信息技术研究所 一种基于lte的子带跳频外部干扰避免系统及方法
CN103415023B (zh) * 2013-08-16 2016-05-18 中国石油天然气股份有限公司 一种基于双门限能量检测的分簇协作频谱感知方法及系统
EP3567752B1 (en) * 2017-01-09 2023-05-10 Beijing Xiaomi Mobile Software Co., Ltd. Method and apparatus for acquiring and sending system information

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101013926A (zh) * 2007-02-05 2007-08-08 华中科技大学 一种无线传感器网络通信方法和系统
CN101013987A (zh) * 2007-02-05 2007-08-08 南京邮电大学 一种高效的无线传感器网络拓扑控制方法
CN101286911A (zh) * 2008-03-05 2008-10-15 中科院嘉兴中心微系统所分中心 基于分簇和Mesh相结合的无线传感器网络组网方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070264952A1 (en) * 2006-05-12 2007-11-15 Motorola, Inc. Method and apparatus for allowing or denying network access
CN101184324B (zh) * 2006-11-13 2011-08-24 华为技术有限公司 频谱检测和共享的方法、系统、用户设备及装置
CN101267391A (zh) * 2008-03-27 2008-09-17 上海交通大学 基于不均匀分簇的无线传感器网络拓扑控制方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101013926A (zh) * 2007-02-05 2007-08-08 华中科技大学 一种无线传感器网络通信方法和系统
CN101013987A (zh) * 2007-02-05 2007-08-08 南京邮电大学 一种高效的无线传感器网络拓扑控制方法
CN101286911A (zh) * 2008-03-05 2008-10-15 中科院嘉兴中心微系统所分中心 基于分簇和Mesh相结合的无线传感器网络组网方法

Also Published As

Publication number Publication date
CN101753226A (zh) 2010-06-23
CN101753226B (zh) 2014-04-02

Similar Documents

Publication Publication Date Title
US10743154B2 (en) Method and apparatus for forwarding vehicle to everything service
JP5542618B2 (ja) 車両環境に関連するメッセージをブロードキャストするための方法
US20190313405A1 (en) Data transmission method and device
EP2161862A1 (en) Radio transmission method, radio reception method, radio transmission/reception method, radio transmission device, radio reception device, radio transmission/reception system, base station device, and communication terminal device
WO2012163162A1 (zh) 一种空闲频谱的获取方法和设备
EP3522574B1 (en) Communication terminal, communication method, program for communication, communication system, management device, management method, and communication control method
US20160205675A1 (en) Resource Allocation Method, Apparatus and System
EP3711401B1 (en) Method and apparatus for transmission resource selection
US11601788B2 (en) Device-to-device D2D service transmission method, apparatus, and device
WO2022152108A1 (zh) 协作信息发送方法、资源确定方法、通信节点及存储介质
WO2018053765A1 (zh) 通信方法和通信装置
US9408213B2 (en) Wireless communication system, frequency channel sharing method, and network controller device
WO2019096275A1 (zh) Pc5载频选择方法以及装置、设备和基站
EP2999284A1 (en) User device, base station, method for adjusting discovery signal interval, and method for controlling user device
JP2016518056A5 (zh)
WO2010069250A1 (zh) 感知无线电系统的分簇方法、设备及系统
WO2018053766A1 (zh) 通信方法、终端设备和网络设备
CN104349282A (zh) 一种lte系统中的广播业务实现方法
KR101604084B1 (ko) 피어-투-피어 네트워크들에서의 적응형 페이징을 위한 방법들 및 장치
WO2018014793A1 (zh) 一种定位方法及装置
WO2016106639A1 (zh) 一种车联网通信方法及装置
US9730039B2 (en) Method and apparatus for transceiving a warning message in a wireless communication system
EP3456069B1 (en) Reporting of location information
WO2014198296A1 (en) Method and notifying unit for providing a notification about an event
WO2016065622A1 (zh) 一种资源分配装置及方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09832932

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09832932

Country of ref document: EP

Kind code of ref document: A1