WO2008138262A1 - Joint detection method, aware system, user terminal and base station - Google Patents

Abstract

A joint detection method is provided. The method includes the steps as following: an user terminal located at an adjacent aware system overlapping region detects an overlapping region channel; transmitting the channel detection result to the adjacent aware system; the adjacent aware system receives the channel detection result. An aware system, an user terminal and a base station are also provided. The user terminal includes at least a channel detection unit and a detection result transmission unit between the terminal systems; the base station includes at least a channel detection request unit and a detection result transmission unit between the base station systems. The method, aware system, user terminal and base station can make the adjacent aware systems carry out a joint detection with each other, and enhance a channel sensing capability of the aware system.

Description

 Joint detection method, cognitive system, user terminal and base station

 The present invention relates to cognitive radio technology, and more particularly to a method of joint detection, a cognitive system, a user terminal, and a base station.

Background technique

 Cognitive radio technology is a technology that enables efficient and flexible use of idle frequency bands without compromising authorized users. A system that uses cognitive radio technology, that is, a cognitive system, has channel sensing capability to measure the working channel to ensure flexible use of idle authorized user frequency bands without interfering with authorized users on the working channel.

 The perceived result of the cognitive system is the result of the joint sensing of the base station within the system and the user terminals distributed within the coverage area of the base station service. Therefore, the cognitive ability of the cognitive system is determined by the sensing capabilities of the base station and the user terminal in the system.

 The process for the cognitive system to perceive the channel occupation specifically includes: the base station in the cognitive system initiates a measurement request to the user terminal in the coverage area, and the user terminal in the cognitive system performs the set measurement task; the user terminal receives the measurement request. After that, the measurement is performed within the time specified by the measurement request, and the measurement report is returned to the base station in the uplink bandwidth allocated by the cognitive system base station, or the measurement report is returned in the uplink access of the serving base station in a competitive manner; the base station receives the measurement After the report, the measurement confirmation is returned to the user terminal.

 Adjacent cognitive systems have the ability to communicate with each other to ensure that sufficient information can be obtained between neighboring cognitive systems to achieve fair access to spectrum resources of neighboring cognitive systems. The base station and the user terminal in the cognitive system send and receive coexisting communication messages, including the current channel occupancy information of the cognitive system, under the scheduling of the base station. The cognitive system can coordinate the channel occupancy according to the received coexistence communication message, and achieve better coexistence with the adjacent cognitive system.

In the process of implementing the present invention, the inventors have found that at least the following technical problems exist in the prior art: Since the sensing capability of the base station of the cognitive system is limited, if there is an area in the working channel that exceeds the sensing range of the base station and the user terminal is not distributed, the cognitive system cannot perceive the area, that is, the cognitive system exists in the working channel. Perceptual blind zone. If there is an authorized user in the perceptual blind zone, the cognitive system will not be able to perceive the authorized user, that is, the authorized user is an implicit authorized user, and thus may cause interference to the authorized user.

 In addition, if two adjacent cognitive systems operating on the same channel do not have user terminals in the overlapping area, the two adjacent cognitive systems cannot perceive the channel occupancy of the other party, that is, the two cognitives The system is a hidden neighbor cognitive system, which leads to the existence of access blind spots in the overlapping areas of the two adjacent cognitive systems.

 In summary, cognitive systems in the prior art may have a perceptual blind zone due to limited perceptual capabilities, resulting in interference to authorized users, and may also result in access blind spots in overlapping regions.

Summary of the invention

 In view of this, an embodiment of the present invention provides a method for joint detection, and another aspect provides a cognitive system, a user terminal, and a base station, which implement joint detection of adjacent cognitive systems, and improve cognitive systems. Channel awareness.

 A method for joint detection includes: performing, by a user terminal in an overlapping area of an adjacent cognitive system, overlapping area channel detection; and a cognitive system in which the user terminal is located, transmitting the channel detection result to the adjacent cognitive system The neighboring cognitive system receives the channel detection result.

 A cognitive system, including a base station and a user terminal, wherein

The user terminal is configured to perform channel detection, and report the channel detection result to the base station; or send the overlapping area channel detection result to the adjacent cognitive system actively or under the scheduling of the base station; Receiving, by the base station, an overlapping area channel detection result from the neighboring cognitive system; the base station, configured to receive the channel detection result reported by the user terminal, initiate the user, or schedule the user terminal, and use the overlapping area channel The detection result is sent to the neighboring cognitive system; the user terminal is received or scheduled to receive the overlapping area channel detection result from the neighboring cognitive system. A user terminal, comprising:

 a channel detecting unit, configured to perform channel detection;

 The inter-system inter-system detection result sending unit is configured to send an overlapping area channel detection result to the neighboring cognitive system by itself or under the scheduling of the base station.

 A base station comprising:

 a channel detection requesting unit, configured to initiate channel detection, and receive a channel detection result reported by a user terminal managed by itself;

 The inter-base station inter-system detection result sending unit is configured to directly send the overlapping area channel detection result to the neighboring cognitive system to the adjacent cognitive system, or the user terminal that manages the self-management.

 As can be seen from the above technical solutions, in the embodiment of the present invention, the cognitive system transmits the channel detection result of the user terminal in the overlapping area with the adjacent cognitive system to the adjacent cognitive system, thereby realizing the relationship between the adjacent cognitive systems. The joint detection improves the channel awareness of the cognitive system.

DRAWINGS

 1 is a schematic diagram of an application scenario of a joint detection method according to an embodiment of the present invention;

 2 is a schematic diagram of a second application scenario of a joint detection method according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of a user terminal according to an embodiment of the present invention;

 FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention.

detailed description

 In order to make the objects, technical solutions and advantageous effects of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the embodiments and drawings.

 In the embodiment of the present invention, the user terminal in the overlapping area of the adjacent cognitive system performs overlapping area channel detection, and sends the channel detection result to the adjacent cognitive system by the cognitive system where the user terminal is located; The system receives the channel detection result, thereby implementing joint detection of neighboring cognitive systems.

In the embodiment of the present invention, two methods for sending a detection report to an adjacent cognitive system are provided: The first method is: a base station (BS) of a cognitive system in which a user terminal located in an overlapping area with an adjacent cognitive system is located, or a user terminal managed by the BS in an overlapping area with an adjacent cognitive system And transmitting the overlapping area channel detection result to the adjacent cognitive system.

 Specifically, the BS or the BS schedules the user terminal in the overlapping area of the adjacent cognitive system that is managed by itself, on the working channel where the user is located, or the working channel where the adjacent cognitive system is located, or the set neighboring cognition The system transmits the overlapping area channel detection result to the adjacent cognitive system on the dedicated channel that transmits the overlap area detection result.

 Wherein, when the user terminal managed by the BS scheduling itself in the overlapping area of the adjacent cognitive system transmits the overlapping area channel detection result to the adjacent cognitive system on the working channel where the non-adjacent cognitive system is located, the adjacent cognitive system It is necessary to periodically monitor the non-working channel to ensure timely acquisition of the overlapping area channel detection result sent by the non-serving user terminal. Here, the working channel where the non-adjacent cognitive system is located may be a working channel in which the user terminal located in the overlapping area of the adjacent cognitive system is located, or a set overlapping area transmits a dedicated channel of the overlapping area channel detection result to the adjacent cognitive system. .

 When the user terminal in the overlapping area of the adjacent cognitive system managed by the BS scheduling sends the overlapping area channel detection result to the adjacent cognitive system on the working channel of the adjacent cognitive system, the specific implementation manner may be:

 The BS schedules the user terminal in idle time, switches to the working channel of the adjacent cognitive system, synchronizes with the adjacent cognitive system, accesses the adjacent cognitive system, and then the latest overlapping area channel detection result by the user terminal. Send to the adjacent cognitive system that has been connected.

 When the user terminal sends the overlapping area channel detection result to the adjacent cognitive system on the working channel of the neighboring cognitive system, or the set dedicated channel, the specific implementation manner may be:

The user terminal switches to the working channel of the neighboring cognitive system or the dedicated channel under the scheduling of the BS, and uses an unreliable connection or a reliable connection on the working channel of the adjacent cognitive system or the dedicated channel. The overlapping area channel detection result is sent to the adjacent cognitive system. In this case, the neighboring cognitive system needs to reserve resources for the non-serving user terminal and receive the overlapping area channel detection result on the reserved resources. The second method is: The user terminal in the overlapping area of the adjacent cognitive system actively sends the overlapping area channel detection result to the adjacent cognitive system.

 The specific implementation manner may be: the user terminal in the overlapping area of the adjacent cognitive system actively sends the overlapping area channel detection result to the adjacent cognitive system on the working channel of the cognitive system; or: The user terminal in the overlapping area of the system actively switches to the working channel of the adjacent cognitive system during its idle time, synchronizes with the adjacent cognitive system, accesses the adjacent cognitive system, and then the latest overlapping area. The channel detection result is sent to the neighboring cognitive system that has been accessed.

 The user terminal in the overlapping area of the adjacent cognitive system may actively switch to the working channel of the adjacent cognitive system or the preset dedicated channel during its idle time, and directly use the unreliable connection or A reliable connection sends the overlapping area channel detection results to the neighboring cognitive system. In this case, the neighboring cognitive system needs to reserve resources for the non-serving user terminal in advance, and receive the overlapping area channel detection result from the non-serving user terminal on the reserved resource.

 In addition, when the user terminal actively sends the overlapping area channel detection result to the neighboring cognitive system, the user terminal may also switch to a preset dedicated channel for transmitting the overlapping area channel detection result to the neighboring cognitive system, and send the overlapping area channel detection result. Give adjacent cognitive systems.

 In the above two methods for transmitting detection results to an adjacent cognitive system, if the user terminal actively transmits an overlapping area channel detection result to the neighboring cognitive system under the BS scheduling, or if the user terminal actively uses the unreliable connection The detection result is sent to the neighboring cognitive system, and the user terminal can directly send the burst packet carrying the detection result to the neighboring cognitive system. If the user terminal sends the detection result to the neighboring cognitive system by using a reliable connection, the user terminal first establishes a reliable connection with the neighboring cognitive system, that is, the handshake connection, and then sends the overlapping area channel detection result to the adjacent cognitive. The system ensures that the neighbor cognitive system receives the overlapping area channel detection result from the user terminal.

Here, the method for establishing a reliable connection between the user terminal and the neighboring cognitive system may be: the user terminal sends a request for establishing a reliable connection to the neighboring cognitive system, and confirms the reliable connection when receiving the response message from the adjacent cognitive system. If the establishment is successful, the detection result can be sent to the adjacent cognitive system. When the adjacent cognitive system receives the channel detection result of the overlapping area, the operation channel selection, the candidate channel selection, and the like may be performed according to the channel occupation information carried in the detection result, so as to coexist with the authorized user and the cognitive system. . For example, if the neighboring cognitive system determines that there is an authorized user on the working channel where it is located according to the received detection result, the current working channel is exited; if it is determined that there is an authorized user on the channel other than the working channel, when the channel switching is performed, , Avoid selecting the channel where the authorized user exists to switch.

 When there are multiple adjacent cognitive systems in the cognitive system where the user terminal in the overlapping area of the adjacent cognitive system exists, multiple adjacent cognitive systems can negotiate through the cognitive system in which the user terminals in the overlapping area are located, and determine each Working channel and/or candidate channel.

 There are three specific implementation processes for the user terminal in the overlapping area of the adjacent cognitive system to perform channel detection. One is as follows: The user terminal in the overlapping area of the adjacent cognitive system performs channel detection in the process of initializing the access cognitive system.

 The other is: After receiving the measurement request sent by the serving cell BS, the user terminal in the overlapping area of the adjacent cognitive system performs channel detection.

 There is also a method of: performing channel detection when the user terminal in the overlapping area of the adjacent cognitive system is in an idle state.

 The method may further include: the serving cell BS receiving the assisted measurement overlap from the adjacent cognitive system before the step of performing channel detection after receiving the measurement request sent by the serving cell BS by the user terminal in the overlapping area of the adjacent cognitive system The area request determines whether to accept the request, and when determining the acceptance, sends a measurement request to the user terminal in the overlapping area of the adjacent cognitive system.

 Alternatively, when the serving cell BS receives the assistance measurement overlap region request from the neighboring cognitive system, it determines whether to accept the request, and when determining the acceptance, transmits the previous channel detection result to the adjacent cognitive system. Therefore, when the cognitive system sends the channel detection result to the neighboring cognitive system, the valid channel detection result that has been measured may be forwarded, or may be performed after receiving the assistance measurement overlapping area request of the adjacent cognitive system. The result of the channel measurement.

When the serving cell BS determines to accept the received assistance to measure the overlapping area request, it may enter one The step sends a cooperation response to the neighboring cognitive system, and after receiving the cooperation response, the neighboring cognitive system may arrange to receive the bandwidth or the competition window of the channel detection result of the overlapping area. If the serving cell BS determines to reject the received assistance measurement overlap region request, the serving cell BS may send a reject response to the neighboring cognitive system.

 In the embodiment of the present invention, when the overlapping area channel detection result is sent to the neighboring cognitive system, the specific implementation manner may be: carrying the overlapping area channel detection result in a coexistence communication message or other message and sending it to the adjacent cognitive system. .

 The overlapping area channel detection result sent to the adjacent cognitive system may be a coexistence detection report, including: an authorized user detection report and/or an adjacent cognitive system detection report.

 FIG. 1 is a schematic diagram of an application scenario of a joint detection method according to an embodiment of the present invention. In this embodiment, cognitive system A and cognitive system B operate on channels A and B, respectively, and only the user terminal B-CPE of cognitive system B is in the overlapping area of the two cognitive systems. If the B-CPE is newly powered on, and the serving base station is the base station of the cognitive system B, that is, the B-CPE is currently under the management of the base station of the cognitive system B, the B-CPE performs initial measurement, and the B-CPE access is recognized. After system B, the measurement result of the initialization measurement, that is, the overlapping area channel detection result, is transmitted by the base station in the B-CPE or the cognitive system B to the base station of the cognitive system A. The B-CPE may be active or may send the measurement result of the initial measurement to the cognitive system A under the base station scheduling of the cognitive system B.

 If the B-CPE is connected to the cognitive system B and is in a normal working state, the B-CPE performs channel detection under the driving request sent by the base station of the cognitive system B, and the obtained overlapping area channel detection result is obtained by B. The base station in the CPE or cognitive system B is sent to the cognitive system A. The B-CPE may be active or may send the detection result to the cognitive system A under the base station scheduling of the cognitive system B.

 When the overlapping area channel detection result is sent to the cognitive system A, it can be sent to the cognitive system A by carrying the detection result in a coexistence communication message or other message.

When the channel detection result obtained by the user terminal B-CPE is sent to the cognitive system A, two different forwarding modes may be used, one is a direct forwarding mode, that is, a channel obtained directly by the user terminal B-CPE in the overlapping area. The detection result is forwarded to cognitive system A; the other is to use compressed mode forwarding, The channel detection result obtained by the user terminal B-CPE in the overlapping area is compressed, and then transmitted to the cognitive system A. The compression processing mentioned here may be: performing a hard judgment processing on the va lue value in the detection report as 1 or 0, deleting parameters that are unnecessary for the adjacent cognitive system in the original measurement report, etc., thereby reducing air resource consumption. the goal of. For example, the signal strength obtained by the user terminal B-CPE may be hard-processed, and the signal strength may be determined by 1 or 0, and the MAC address of the user terminal detecting the coexistence detection report may be detected in the detection result. The necessary parameters are omitted.

 Table 1 shows a message definition method for carrying channel detection results when transmitting channel detection results to neighboring cognitive systems:

 Table 1

The management message type (Management Mes sage Type) and the unit identification information (Element ID) are selected one by one. If the channel detection result is carried by the newly added management message, the Management Mes sage Type needs to be carried in the management message, if If the extension unit carries the channel detection result in the existing management message, the element ID needs to be carried in the message. Here, already The existing management message can be a coexistence communication message.

 The source ID and the destination ID are respectively the MAC address of the neighboring base station of the user terminal in the overlapping area and the neighboring base station to be transmitted by the channel detection result. If the information can be obtained by other information of the system, it can be omitted.

 Number of Single Measurement Reports is the number of measurement reports included in this message. The number of bits in Single Measurement Reports is variable.

 The single measurement report type is the type of a single measurement report carried in the message. It identifies whether each report directly forwards the original measurement result, or whether the original measurement result is processed and then forwarded, that is, compressed or uncompressed. If the measurement report is carried in an uncompressed manner, the individual test report format designed in the existing standard is followed. Consider saving air interface resources, and further define a single test report in a compressed manner.

 A single measurement report for compression can be defined as:

Table 2, where the Channel Number indicates the channel number included in the message. The Report Type is used to indicate the measurement report type, K is the minimum number of bits in the field, n is the reserved bit, and n is greater than or equal to zero. The measurement time parameter Duration indicates that the current port is acquired. When the neighboring cognitive system receives the message, the neighboring cognitive system judges whether the measurement 4 is valid within the valid time by the Duration contained therein, and if so, the adjacent cognitive system performs corresponding operations on the measurement report. , otherwise discard the measurement report. The method for determining whether the measurement report is within the valid time may be: the cognitive system receiving the measurement report according to a preset measurement report effective time range, and the detection time recorded by the Duration in the measurement report, Determined from the time of detection to the receipt of the cognitive system Whether the length of the measurement report exceeds a preset effective time range, if not exceeded, it is determined that the measurement is valid; otherwise, the measurement is invalid.

 The B-CPE can also actively report the detection result to the cognitive system A. In this case, the B-CPE needs to actively switch to the working channel A of the cognitive system A, and send a burst containing the detection report to the cognitive system A. package. The cognitive system A receives the measurement report reported by the B-CPE on the corresponding reserved resource.

 If the cognitive system A determines that there is an authorized user on the current working channel A according to the received measurement result, the channel A is quickly exited; if it is determined that there is an authorized user on the channel other than the working channel, the channel switching is avoided. Select the channel where the authorized user exists to switch.

 As shown in FIG. 1, there are authorized users working on channel A in the overlapping area of cognitive systems A and B, so cognitive system A determines its own location based on the received overlapping channel channel detection result from cognitive system B. If there is an authorized user on the working channel A, the channel A is quickly exited.

 FIG. 2 is a schematic diagram of a second application scenario of a joint detection method according to an embodiment of the present invention. In this embodiment, both cognitive systems A and C work on channel A, cognitive system B operates on channel B, and only users of cognitive system B are in the overlapping area of cognitive system A and cognitive system C. Terminal B-CPE.

 If the B-CPE is newly powered on, and the serving base station is the base station of the cognitive system B, the B-CPE performs initial measurement, and after the B-CPE accesses the cognitive system B, the base station in the B-CPE or the cognitive system B The measurement result of the initial measurement, that is, the overlapping area channel detection result, is sent to the cognitive systems A and C. The B-CPE may actively or may transmit the overlapping area channel detection result to the cognitive systems A and C under the base station scheduling of the cognitive system B.

 If the B-CPE has access to the cognitive system B in a normal working state, the B-CPE performs channel detection under the driving request sent by the base station of the cognitive system B, and the obtained overlapping area channel detection result is obtained by B- The base station in the CPE or cognitive system B is sent to cognitive systems A and C. The B-CPE may be active or may send the overlapping area channel detection result to the cognitive systems A and C under the base station scheduling of the cognitive system B.

When the overlapping area channel detection result is transmitted to the cognitive systems A and C, the overlapping area channel detection result may be carried in the coexistence communication message and sent to the cognitive systems A and C. In the specific implementation, The B-CPE can transmit the overlapping area channel detection result to the cognitive systems A and C by using a reliable connection, or can transmit the overlapping area channel detection result to the cognitive systems A and C by using the unreliable connection mode. For the cognitive system, the specific implementation manner of the B-CPE transmitting the overlapping area channel detection result to the cognitive system A or C by using the reliable connection and the non-reliable connection is the same as that described in FIG. 1 , and details are not described herein again. .

 The B-CPE can also actively report the overlapping area channel detection results to the cognitive systems A and C. In this case, the B-CPE needs to actively switch to the working channel A of the cognitive systems A and C, to the cognitive system A. And C sends a burst packet containing the result of the channel detection of the overlap region. The cognitive systems A and C receive the overlapping area channel detection results reported by the B-CPE on the corresponding reserved resources.

 If cognitive systems A and C determine that there is an authorized user on their current working channel A based on the received overlapping area channel detection result, the channel is quickly exited. Since direct perception and communication are not possible between cognitive systems A and C, cognitive systems A and C can negotiate through the cognitive system B using channels. Cognitive System B acts as a joint aware and relay communication in this process, thus enabling better coexistence between adjacent cognitive systems.

 One of ordinary skill in the art will appreciate that all or part of the steps in implementing the above-described embodiments can be accomplished by program-related hardware. The software corresponding to the embodiment can be stored in a computer readable storage medium such as ROM/RAM, disk, optical disk, and the like.

 In order to implement the joint detection method provided by the present invention, the embodiment of the present invention simultaneously provides a cognitive system including a base station and a user terminal. among them,

 The user terminal is configured to perform channel detection, and report the channel detection result to the base station; and actively or under the scheduling of the base station, send the overlapping area channel detection result to the adjacent cognitive system; and actively or under the base station scheduling, receive the neighboring recognition Knowing the overlapping area channel detection result of the system;

 The base station is configured to receive the channel detection result reported by the user terminal, initiate the user terminal, or schedule the user terminal, and send the overlapping area channel detection result to the adjacent cognitive system; and receive or schedule the user terminal to receive the overlap from the adjacent cognitive system. Regional channel detection result.

The user terminal in the cognitive system provided by the embodiment of the present invention includes channel detection The channel detecting unit further includes: a terminal system inter-system detection result transmitting unit. FIG. 3 is a schematic structural diagram of a user terminal according to an embodiment of the present invention.

 The inter-terminal system detection result sending unit is configured to send an overlapping area channel detection result to the adjacent cognitive system by itself or under the scheduling of the base station.

 The user terminal may further include: an inter-system inter-system detection result receiving unit, configured to receive the self-actively, or receive the overlapping area channel detection result from the neighboring cognitive system under the base station scheduling.

 When the user terminal itself transmits or receives the overlapping area channel detection result on the working channel of the neighboring cognitive system, the terminal system detection result sending unit of the user terminal may include: a first channel switching unit and the first The transmitting unit; the inter-terminal system detection result receiving unit of the user terminal comprises: a first switching unit and a first receiving unit. among them,

 a first channel switching unit, configured to switch to a working channel where an adjacent cognitive system is located, or in synchronization with an adjacent cognitive system, in an idle time of a user terminal in an overlapping area of the adjacent cognitive system , access to adjacent cognitive systems;

 The first sending unit is configured to send the overlapping area channel detection result to the accessed neighboring cognitive system actively or under the scheduling of the base station.

 The first switching unit is configured to switch to the working channel where the adjacent cognitive system is located actively or in the idle time of the user terminal during the idle time of the user terminal, and synchronize with the adjacent cognitive system to access the adjacent cognitive system;

 The first receiving unit is configured to receive an overlap region channel detection result sent by the neighboring cognitive system that has been accessed.

 When the user terminal transmits or receives the channel detection result on the working channel of the neighboring cognitive system or the set dedicated channel on the active channel or the base station scheduling, the inter-terminal system detection result transceiver unit of the user terminal may include: a switching unit and a second sending unit; the inter-terminal system detection result receiving unit of the user terminal comprises: a second switching unit and a second receiving unit. among them,

a second channel switching unit, configured to switch to a working channel or a specific set of an adjacent cognitive system actively or under base station scheduling during an idle time of a user terminal in an overlapping area of the adjacent cognitive system Channel

 The second sending unit is configured to send an overlapping area channel detection result to the adjacent cognitive system by using an unreliable connection or a reliable connection actively or under the base station scheduling.

 Here, when the second sending unit uses the reliable connection and reception channel detection result, the second sending unit specifically includes: a reliable connection establishing unit and a detection result sending unit,

 a reliable connection establishing unit for establishing a reliable connection with an adjacent cognitive system;

 The detection result transmitting unit is configured to send the overlapping area channel detection result to the adjacent cognitive system through the reliable connection.

 a second switching unit, configured to switch to a working channel or a set dedicated channel of an adjacent cognitive system actively or under base station scheduling during idle time of the user terminal;

 The second receiving unit is configured to use an unreliable connection or a reliable connection actively or in the base station scheduling, and receive an overlapping area channel detection result sent by the neighboring cognitive system.

 When the second receiving unit uses the reliable connection to perform information interaction with the adjacent cognitive system, the second receiving unit includes:

 a reliable connection establishing unit for establishing a reliable connection with an adjacent cognitive system;

 The detection result receiving unit is configured to receive the overlapping area channel detection result sent by the adjacent cognitive system by using the established reliable connection.

 The base station provided by the embodiment of the present invention includes at least: a channel detection request unit and a base station system detection result sending unit. FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention. The channel detection requesting unit is configured to initiate channel detection, and receive a channel detection result reported by the user terminal managed by itself;

 The inter-base station inter-system detection result sending unit is configured to directly send the overlapping area channel detection result to the neighboring cognitive system to the adjacent cognitive system, or the user terminal that manages the self-management.

The base station may further include: a base station inter-system detection result receiving unit, configured to directly receive, or schedule a self-managed user terminal to receive an overlapping area channel detection result sent by the neighboring cognitive system. When the base station schedules the user terminal in the overlapping area of the adjacent cognitive system to transmit and receive the overlapping area channel detection result in the working channel of the adjacent cognitive system, the base station inter-system detection result sending unit of the base station may include accessing the adjacent cognitive system. The scheduling unit and the first detection result sending scheduling unit; the base station inter-system detection result receiving unit comprises: an access neighboring cognitive system scheduling unit and a first detection result receiving scheduling unit. among them,

 Accessing a neighboring cognitive system scheduling unit for scheduling user terminals in overlapping areas of adjacent cognitive systems, switching to working channels of adjacent cognitive systems, synchronizing with adjacent cognitive systems, and accessing phase recognition System

 The first detection result sending scheduling unit is configured to schedule the user terminal to send the overlapping area channel detection result to the accessed neighboring cognitive system.

 The first detection result receiving scheduling unit is configured to schedule the user terminal to receive the overlapping area channel detection result from the accessed adjacent cognitive system.

 The base station inter-system detection result sending unit of the base station may include: channel switching when the user terminal transmits or receives the overlapping area channel detection result on the working channel of the neighboring cognitive system or the set dedicated channel by the user terminal or the base station scheduling. The scheduling unit and the second detection result sending scheduling unit; the base station inter-system detection result receiving unit of the base station may include: a channel switching scheduling unit and a second detection result receiving scheduling unit. among them,

 a channel switching unit, configured to schedule a user terminal in an overlapping area of the adjacent cognitive system to switch to a working channel or a set dedicated channel of the adjacent cognitive system,

 The second detection result sending scheduling unit is configured to schedule the user terminal to send the overlapping area channel detection result to the adjacent cognitive system by using an unreliable connection or a reliable connection on the working channel of the adjacent cognitive system or on the dedicated channel.

 a second detection result receiving and scheduling unit, configured to schedule the user terminal to use an unreliable connection or a reliable connection on the working channel of the adjacent cognitive system or on the dedicated channel, and receive the overlapping area channel detection result sent by the adjacent cognitive system. .

The base station further includes: an assistance measurement request unit, configured to receive from an adjacent cognitive system Assisting in measuring an overlap region request, determining to accept the request, instructing the channel detection request unit to initiate channel detection, or instructing the base station intersystem detection result transceiver unit to send a channel detection result to an adjacent cognitive system; When the cognitive system assists in measuring overlapping regions, it sends an assistance to the adjacent cognitive system to measure the overlap region request.

 As can be seen from the above description, the detection result of the user terminal in the overlapping area of the adjacent cognitive system is sent to the adjacent cognitive system while being sent to the own cognitive cell, thereby realizing the adjacent cognitive system. The joint detection between the two improves the channel perception ability of the cognitive system. Specifically, when there is a cognitive blind zone in the cognitive system, and there is an authorized user in the cognitive blind zone, the cognitive system may send the detected detection by the user terminal in the overlapping area of the adjacent cognitive system from the adjacent cognitive system. As a result, it is known that there is an authorized user on the current working channel, so that the working channel can be quickly exited to avoid interference with authorized users.

 In addition, when two adjacent cognitive systems do not have user terminals in the overlapping area, that is, the two adjacent cognitive systems are mutually hidden neighbor cognitive systems, and when there are access blind spots in the overlapping area, the two The cognitive system can eliminate access blindness by obtaining channel detection results from another neighboring cognitive system in which the user terminal exists in the overlapping area. The two cognitive systems with access blind spots can also negotiate the channel occupancy through a common neighboring cognitive system.

 In summary, the above description is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Claim A method for joint detection, characterized in that it comprises:  User terminals in overlapping areas of adjacent cognitive systems perform overlapping area channel detection;  Transmitting the channel detection result to the neighboring cognitive system;  The neighboring cognitive system receives the channel detection result.  2. The method of joint detection according to claim 1, wherein the step of transmitting the channel detection result to an adjacent cognitive system is:  The base station BS or the user terminal of the cognitive system in which the user terminal is located transmits the channel detection result to an adjacent cognitive system.  The method of the joint detection according to claim 2, wherein the step of the user terminal transmitting the channel detection result to the adjacent cognitive system is specifically:  The user terminal actively sends the channel detection result to the neighboring cognitive system under the BS scheduling or the user terminal.  4. The method of joint detection according to claim 1, wherein the step of transmitting the channel detection result to an adjacent cognitive system is specifically:  Sending the channel detection result on a current working channel of the cognitive system where the user terminal is located, or on a working channel of the neighboring cognitive system, or on a dedicated channel that is configured to send the detection result. To the adjacent cognitive system.  The method of the joint detection according to claim 4, wherein the step of transmitting the channel detection result to the adjacent cognitive system on the working channel of the adjacent cognitive system specifically includes: The user terminal switches to the working channel of the neighboring cognitive system under the scheduling of the BS, synchronizes with the neighboring cognitive system, accesses the neighboring cognitive system, and uses the channel detection result. Send to the adjacent cognitive system that has been connected. The method of joint detection according to claim 4, wherein the detecting result is sent on a working channel of an adjacent cognitive system, or a set dedicated channel for transmitting the detection result. The steps for sending to the adjacent cognitive system are as follows:  The user terminal, under the scheduling of the BS or actively, switches to a working channel of the neighboring cognitive system or the dedicated channel, on a working channel or the dedicated channel of the neighboring cognitive system, The channel detection results are sent to the neighboring cognitive system with an unreliable connection or a reliable connection.  7. The method of joint detection according to claim 6, wherein the neighboring cognitive system receives the channel detection result as:  The neighboring cognitive system reserves resources for the non-serving user terminal, and receives the detection result on the reserved resource.  The method of joint detection according to any one of claims 1 to 7, wherein the step of transmitting the channel detection result to an adjacent cognitive system is specifically:  The detection result is carried in a coexistence communication message or other message and sent to the neighboring cognitive system.  The method of the joint detection according to claim 1, wherein the method further comprises: after receiving the channel detection result, the neighboring cognitive system according to the channel occupancy carried in the channel detection result Information, working channel and/or candidate channel selection.  The method of joint detection according to any one of claims 1 to 7, wherein the channel detection result is a coexistence detection report, including an authorized user detection report and/or an adjacent cognitive system detection report.  The method of joint detection according to any one of claims 1 to 7, wherein the step of transmitting the channel detection result to the neighboring cognitive system is:  The channel detection result is compressed and sent to an adjacent cognitive system.  The method for joint detection according to claim 1, wherein the user terminal in the overlapping area of the adjacent cognitive system performs overlapping area channel detection as: the user in the overlapping area of the adjacent cognitive system The terminal performs overlapping area channel detection during initialization of the access cognitive system or in an idle state. The method of joint detection according to claim 1, wherein the neighboring recognition The user terminal that knows the overlapping area of the system performs the overlapping area channel detection as follows: After receiving the measurement request sent by the serving cell BS, the user terminal in the overlapping area of the adjacent cognitive system performs the overlapping area channel detection.  The method for joint detection according to claim 13, wherein the user terminal in the overlapping area of the adjacent cognitive system performs the overlapping area channel detection after receiving the measurement request sent by the serving cell BS. The steps also include:  The serving cell BS receives an assistance measurement overlap area request from an adjacent cognitive system, determines whether the request is accepted, and sends a measurement request to the user terminal in the overlapping area of the adjacent cognitive system when determining the acceptance.  The method of joint detection according to claim 14, wherein the method further comprises:  The serving cell base station sends a cooperation response to the neighboring cognitive system when determining the acceptance, and after receiving the cooperation response, the neighboring cognitive system arranges to receive the bandwidth or competition of the detection result. W o  The method of joint detection according to claim 1, wherein the method further comprises:  The serving cell BS of the user terminal in the overlapping area of the adjacent cognitive system receives the assistance measurement overlapping area request from the neighboring cognitive system, determines whether to accept the request, and directly transmits the channel detection result to the phase when determining the acceptance Neighboring cognitive system.  17. The method of joint detection according to claim 1, wherein the method further comprises: when the cognitive system has a plurality of adjacent cognitive systems, the plurality of adjacent cognitive systems pass through The cognitive system negotiates to determine the occupancy of the channel.  18. A cognitive system, comprising a base station and a user terminal, characterized in that  The user terminal is configured to perform channel detection, and report the channel detection result to the base station; the base station is configured to receive a channel detection result reported by the user terminal; Transmitting, by the user terminal or the base station, the overlapping area channel detection result to the adjacent cognitive system, and/or Receive overlapping channel channel detection results from neighboring cognitive systems.  19. A user terminal, comprising:  a channel detecting unit, configured to perform channel detection;  The inter-system system detection result sending unit is configured to send an overlapping area channel detection result to the adjacent cognitive system.  The user terminal according to claim 19, wherein the inter-terminal system detection result sending unit comprises:  a first channel switching unit, configured to switch to a working channel where the neighboring cognitive system is located, or in synchronization with the neighboring cognitive system, in an idle time of the user terminal, Accessing the adjacent cognitive system;  And a first sending unit, configured to send an overlapping area channel detection result to the accessed neighboring cognitive system actively or under the base station scheduling.  The user terminal according to claim 19, wherein the inter-terminal system detection result sending unit comprises:  a second channel switching unit, configured to switch to a working channel or a set dedicated channel of the neighboring cognitive system actively or under the base station scheduling during idle time of the user terminal;  And a second sending unit, configured to: actively or in the base station scheduling, use an unreliable connection or a reliable connection, and send an overlapping area channel detection result to the neighboring cognitive system.  The user terminal according to claim 21, wherein when the second sending unit uses the reliable connection to perform information interaction with the neighboring cognitive system, the second sending unit includes:  a reliable connection establishing unit for establishing a reliable connection with the adjacent cognitive system;  And a detection result sending unit, configured to send an overlapping area channel detection result to the neighboring cognitive system by using the reliable connection.  The user terminal according to claim 19, further comprising: The inter-terminal system detection result receiving unit is configured to receive the self-actively, or receive the overlapping area channel detection result from the adjacent cognitive system under the base station scheduling. The user terminal according to claim 23, wherein the inter-terminal system detection result receiving unit comprises:  a first switching unit, configured to switch to the working channel where the neighboring cognitive system is located, or in synchronization with the neighboring cognitive system, in an idle time of the user terminal, in synchronization with the neighboring cognitive system Into the adjacent cognitive system;  The first receiving unit is configured to receive an overlap region channel detection result sent by the neighboring cognitive system that has been accessed.  The user terminal according to claim 23, wherein the inter-terminal system detection result receiving unit comprises:  a second switching unit, configured to switch to a working channel or a set dedicated channel of the neighboring cognitive system actively or under the base station scheduling during an idle time of the user terminal;  And a second receiving unit, configured to receive an unreliable connection or a reliable connection by using the neighboring cognitive system, or to receive an overlapping area channel detection result sent by the neighboring cognitive system.  The user terminal according to claim 25, wherein when the second receiving unit uses the reliable connection to perform information interaction with the adjacent cognitive system, the second receiving unit includes:  a reliable connection establishing unit for establishing a reliable connection with the adjacent cognitive system;  And a detection result receiving unit, configured to receive, by the reliable connection, an overlapping area channel detection result sent by the neighboring cognitive system.  27. A base station, comprising:  a channel detection requesting unit, configured to initiate channel detection, and receive a channel detection result reported by a user terminal managed by itself;  The inter-base station inter-system detection result sending unit is configured to directly send the overlapping area channel detection result to the neighboring cognitive system to the adjacent cognitive system, or the user terminal that manages the self-management.  The base station according to claim 27, wherein the base station inter-system detection result transmitting and receiving unit comprises: Accessing a neighboring cognitive system scheduling unit, configured to schedule the user terminal, and switch to the neighboring identity A working channel of the knowledge system, in synchronization with the neighboring cognitive system, accessing the neighboring cognitive system; a first detection result sending scheduling unit, configured to schedule the user terminal to access adjacent cognitive The system sends the overlap area channel detection result.  The base station according to claim 27, wherein the base station intersystem detection result sending unit comprises:  a channel switching unit, configured to schedule the user terminal to switch to a working channel or a set dedicated channel of the neighboring cognitive system,  a second detection result sending scheduling unit, configured to schedule the user terminal to use an unreliable connection or a reliable connection on the working channel of the neighboring cognitive system or on the dedicated channel, to the neighboring cognition The system sends the overlap area channel detection result.  The base station according to claim 27, further comprising:  The base station inter-system detection result receiving unit is configured to directly receive, or schedule, the self-managed user terminal to receive the overlapping area channel detection result sent by the neighboring cognitive system.  The base station according to claim 30, wherein the base station inter-system detection result receiving unit comprises:  Accessing a neighboring cognitive system scheduling unit, configured to schedule the user terminal, switch to a working channel of the neighboring cognitive system, synchronize with the neighboring cognitive system, and access the adjacent cognitive system ;  And a first detection result receiving scheduling unit, configured to schedule the user terminal to receive an overlapping area channel detection result from the neighboring cognitive system that has been accessed.  The base station according to claim 30, wherein the base station inter-system detection result receiving unit comprises:  a channel switching unit, configured to schedule the user terminal to switch to a working channel or a set dedicated channel of the neighboring cognitive system, a second detection result receiving scheduling unit, configured to schedule the user terminal to receive the neighboring cognition by using an unreliable connection or a reliable connection on a working channel of the neighboring cognitive system or on the dedicated channel The overlap area channel detection result sent by the system. The base station according to claim 27, wherein the base station further comprises: an assistance measurement requesting unit, configured to receive an assistance measurement overlap area request from an adjacent cognitive system, and determine to accept the request, The channel detection requesting unit initiates channel detection, or instructs the base station inter-system detection result transceiver unit to transmit an overlapping area channel detection result to the neighboring cognitive system; and when determining that the adjacent cognitive system is required to assist in measuring the overlapping area, The system is configured to send assistance to measure overlapping area requests.