WO2015110009A1 - Frequency spectrum conceding method and frequency spectrum occupying method and device - Google Patents

Abstract

Disclosed are a frequency spectrum conceding method and a frequency spectrum occupying method and device. The frequency spectrum conceding method comprises: when determining that a current cognitive radio (CR) system is unable to continue to occupy a work frequency spectrum, initiating to an alternate CR system a negotiation process of delaying the concession of the working frequency spectrum; and conceding the working frequency spectrum after the delayed time determined by the negotiation process. The technical solution provided in an embodiment of the present invention introduces a negotiation process of delaying the concession of a working frequency spectrum, and the current CR system concedes the working frequency spectrum according to the delayed time determined by the negotiation process, avoiding malfunction of both the current CR system and the alternate CR system, and thus improving frequency spectrum utilization.

Description

Spectrum rebate method, spectrum occupation method and device

This application claims priority to Chinese Patent Application No. 201410035349.9, entitled "A Spectrum Rebating Method, Spectrum Occupation Method and Apparatus", filed on January 24, 2014, the entire contents of which are incorporated by reference. In this application.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a spectrum backoff method, a spectrum occupying method, and a device.

Background technique

The radio communication spectrum is a valuable natural resource. With the rapid development of wireless communication technology, the problem of poor spectrum resources is becoming more and more serious. In order to alleviate the current situation of spectrum resources, relevant departments and agencies have monitored and studied the radio communication spectrum. It has been found that certain frequency bands (such as TV bands) have not been used most of the time or have not been used in most areas, and some frequency bands have experienced multiple systems and multiple users competing at the same time. That is, some systems with large service carrying capacity do not have sufficient spectrum resources, while other systems with small service carrying capacity occupy too much resources. The concept of Cognitive Radio (CR) is generated in this context. The basic idea is that the CR system (also called the sensing system) can monitor the current situation without causing interference to the authorization system. Changes in the wireless environment dynamically select white space for communication.

A main application scenario of cognitive radio is that multiple CR systems opportunistically use a certain frequency band, which is not separately licensed to any system, and a certain frequency band is used fairly by multiple systems.

In this scenario, the following three methods exist when accessing a certain frequency band:

The first type is the listen-before-talk method, that is, the interference measurement is performed before accessing a certain channel, and once the channel is confirmed to be occupied, the channel is abandoned and other channels are tried;

The second is to take no measurement, directly occupy a certain channel, and try other channels when it is not working;

The third is to use the spectrum according to certain rules, such as according to a certain time window, in the time window 1, the spectrum is used by the CR system 1, the time window 2 is used by the CR system 2, etc., and each CR system is only in The spectrum can only be used for the corresponding time window.

For users accessing in the second way, directly occupying a certain channel without any measurement or acquisition of a priori information will obviously cause mutual interference with the CR system that originally occupied the channel, when a new "invasive CR system" When the original CR system fails to work, the original CR system needs to perform spectrum retreat, but this concession is unfair to the original CR system, so it is necessary to consider how to achieve the quality of service (QoS) guarantee for the original CR system service.

For the third way, there is a possibility that there are some factors (such as the CR system temporarily has no alternate frequency, and / Or currently carrying an urgent high-priority service), causing a CR system to fail to complete the consignment at the time when the retreat spectrum needs to be completed, and according to the rules, other CR systems occupy the spectrum, which will inevitably lead to the two CR systems. Interference collisions occur, which in turn affects the operation of the two CR systems.

Summary of the invention

The object of the present invention is to provide a spectrum depreciation method, a spectrum occupation method and a device, to solve the problem that the current CR system is interfered on the occupied spectrum resources and cannot work normally, and the current CR system needs to retreat the spectrum but cannot retreat. Avoid problems such as interference collisions.

The object of the invention is achieved by the following technical solutions:

A method of spectrum rebate, including:

Determining, when the current cognitive radio system cannot continue to occupy the working spectrum, initiating a negotiation process for delaying the retreat of the working spectrum to the relay cognitive radio system that needs to occupy the working spectrum;

After the delay time determined by the negotiation process, the working spectrum is withdrawn.

The technical solution provided by the embodiment of the present invention introduces a negotiation process of the delayed retreat working spectrum, and the current cognitive radio system retreats the working spectrum according to the delay time determined by the negotiation process, so that the current cognitive radio system and the succeeding cognitive radio system cannot work normally. Improved spectrum efficiency.

Preferably, the specific implementation manner of the negotiation process for initiating the delayed retreat working spectrum to the relay cognitive radio system that needs to occupy the above working spectrum may be, but is not limited to:

Sending a delayed backoff request message to the relaying cognitive radio system, where the delayed backoff request message includes at least: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

Receiving a delayed backoff response message that takes over feedback from the cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the retreat of the working spectrum.

The delayed backoff response message may include only the indication information of whether to agree to delay the backoff of the working spectrum. Then, if the replacement cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is the time required to delay the retreat included in the delayed retreat request message. Correspondingly, after the time required to delay the backoff included in the delayed backoff request message, the frequency and bandwidth of the working spectrum included in the delayed backoff request message that need to be delayed are reserved. If the replacement cognitive radio system does not agree to delay the retreat of the working spectrum, the delay determined by the negotiation process is a predetermined forced retreat time. Correspondingly, after the forced backoff time, the frequency and bandwidth of the working spectrum included in the delayed backoff request message need to be delayed.

The delayed backoff response message includes only the indication information of whether to agree to delay the revocation of the above working spectrum, and the signaling overhead can be reduced.

Wherein, if the replacement cognitive radio system agrees to delay the retreat of the working spectrum, at least the delayed backoff response message may be To include: Allow time to delay the retreat. Then, the delay time determined by the negotiation process is the time of allowing the delay to be retired included in the delayed backoff response message.

On this basis, the delayed backoff response message may further include: a frequency point and a bandwidth that allow the delay to be withdrawn. Then, after the time when the cognitive radio system is allowed to delay the retreat, the retreat takes over the frequency and bandwidth of the cognitive radio system to allow the delay of the retreat.

Wherein, if the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message may at least include: a mandatory backoff time. Then, the delay time determined by the negotiation process is the forced backoff time. In the embodiment of the present invention, the forced retreat time is less than the time allowed to delay the retreat.

Correspondingly, after the forced backoff time, the frequency and bandwidth of the working spectrum included in the delayed grant request message need to be delayed.

If the replacement cognitive radio system does not agree to delay the retreat of the above working spectrum, the delay time determined by the negotiation process is still called the forced retreat time. The forced backoff time may not be passed through the delayed backoff response message, but is pre-agreed.

The foregoing delayed retreat request message may further include: the current cognitive radio system abandons the indication information of using the working spectrum in the predetermined time period after the time when the delay of the retreat is required; and the current cognitive radio system corresponds to the time after the delay of the retreat is required Within the N time windows, the current cognitive radio system abandons the indication of using the working spectrum; and/or requests information that takes over the cognitive radio system to reduce the transmit power.

Wherein, the indication information that the current cognitive radio system gives up using the above working spectrum can be used as a reference for taking over the cognitive radio system to decide whether to agree to delay the retreat of the working spectrum, and of course, can also be used to indicate that the replacement cognitive radio system can be in the corresponding time period. Or the working spectrum is occupied by the time window.

Wherein, the information requesting to replace the cognitive radio system to reduce the transmission power is used to request the replacement cognitive radio system to reduce the transmission power to reduce or avoid interference with the current cognitive radio system during the delayed backoff period. The information may specifically be an identifier bit, and the different values of the identifier bits indicate whether to request the replacement cognitive radio system to reduce the transmission power, and may also include the transmission power value that needs to be replaced by the cognitive radio system.

If the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message may further include: requesting the current cognitive radio system to abandon the indication information of using the working spectrum within a predetermined time period after the time required to delay the retreat; After the time of the delayed retreat, within the N time windows corresponding to the current cognitive radio system, the current cognitive radio system is required to abandon the indication information of using the working spectrum; and/or, whether the cognitive radio system agrees to reduce the information of the transmission power.

Wherein, the indication information that the current cognitive radio system is required to abandon the use of the working spectrum in a certain time period or time window may be determined based on the indication information that the current cognitive radio system in the delayed retreat request message quits using the working spectrum, and also It can be determined by the replacement cognitive radio system.

Wherein, the information of whether the cognitive radio system agrees to reduce the transmission power may be based on the delayed retreat request cancellation. The request in the interest is determined by the information that the cognitive radio system reduces the transmission power, and may also be determined by itself. The information of whether the cognitive radio system agrees to reduce the transmission power may be an identifier bit, and whether the transmission power is reduced by the different values of the identifier bit, or may be a specific transmission power value. When the transmission power value is 0, it indicates that Agree to reduce the transmission power.

After receiving the delayed backoff response message fed back by the cognitive radio system, the delayed backoff negotiation completion message may also be fed back to the succeeding cognitive radio system, and the delayed backoff negotiation completion message is used to indicate the end of the delayed backoff negotiation process.

A spectrum occupancy method includes:

The negotiation process of delaying the retreat of the working spectrum with the current cognitive radio system when the cognitive radio system needs to occupy the working spectrum occupied by the current cognitive radio system;

After the delay time determined by the negotiation process, the above working spectrum is occupied.

The technical solution provided by the embodiment of the present invention introduces a negotiation process of the delayed retreat working spectrum, and takes over the working spectrum of the cognitive radio system according to the delay time determined by the negotiation process, so as to prevent the current cognitive radio system and the succeeding cognitive radio system from working normally. Improved spectrum efficiency.

Preferably, the implementation of the negotiation process of delaying the retreat of the working spectrum with the current cognitive radio system may be, but is not limited to:

Receiving a delayed backoff request message sent by the current cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time required to delay the backoff;

A delayed backoff response message is fed back to the current cognitive radio system, the delayed backoff response message being used to indicate whether to agree to delay the fallback of the working spectrum.

Preferably, the delayed backoff response message may include: whether to agree to delay the transfer of the indication information of the working spectrum. Then, if the replacement cognitive radio system agrees to delay the retreat of the above working spectrum, the delay time determined by the negotiation process is the time required to delay the retreat included in the delayed retreat request message. After determining the time required to delay the backoff included in the delayed backoff request message, the frequency and bandwidth of the working spectrum included in the delayed backoff request message that need to be delayed are occupied. If the replacement cognitive radio system does not agree to delay the retreat of the above working spectrum, the delay time determined by the negotiation process is a predetermined forced retreat time. After the forced backoff time, the frequency and bandwidth of the working spectrum included in the delayed backoff request message that need to be delayed are reserved.

Preferably, if the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message may include: allowing the time to delay the retreat. Then, the delay time determined by the negotiation process is the time allowed to delay the retreat.

On this basis, the delayed backoff response message may further include: a frequency point and a bandwidth that allow the delay to be withdrawn. Correspondingly, after the time allowed to delay the retreat, the frequency and bandwidth that allow the delay to be withdrawn are occupied.

Preferably, if the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message may include: a forced backoff time. Then, the delay time determined by the negotiation process is the forced backoff time. In the embodiment of the present invention, the forced retreat time is less than the time allowed to delay the retreat.

Correspondingly, after the forced backoff time, the frequency and bandwidth of the working spectrum included in the delayed backoff request message need to be delayed.

Preferably, the delayed retreat request message may further include: the current cognitive radio system abandons the indication information of using the working spectrum within a predetermined period of time after the time when the delay of the retreat is required; and the current recognition after the time of delaying the retreat is required Within the N time windows corresponding to the known radio system, the current cognitive radio system abandons the indication information of the working spectrum; and/or requests to replace the information of the cognitive radio system to reduce the transmission power.

Preferably, if the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message may further include: requesting the current cognitive radio system to abandon the use of the working spectrum within a predetermined period of time after the time when the delayed retreat is required Information; after the time required to delay the concession, within the N time windows corresponding to the current cognitive radio system, the current cognitive radio system is required to abandon the indication of using the working spectrum; and/or, whether the cognitive radio system agrees to reduce the transmission Power information.

Preferably, after the delayed acknowledgement response message is fed back to the current cognitive radio system, the delayed retreat negotiation completion message fed back by the current cognitive radio system may be received, and the delayed retreat negotiation completion message is used to indicate the end of the delayed retreat negotiation process.

Based on the same inventive concept as the method, the embodiment of the present invention further provides a spectrum retreating device, including:

The delayed backoff negotiation module is configured to determine, when the current cognitive radio system cannot continue to occupy the working spectrum, initiate a negotiation process for delaying the retreat of the working spectrum to the relay cognitive radio system that needs to occupy the working spectrum;

The spectrum backoff module is used to retreat the working spectrum after the delay time determined by the negotiation process.

The technical solution provided by the embodiment of the present invention introduces a negotiation process of the delayed retreat working spectrum, and the current cognitive radio system retreats the working spectrum according to the delay time determined by the negotiation process, so that the current cognitive radio system and the succeeding cognitive radio system cannot work normally. Improved spectrum efficiency.

Preferably, the delayed backoff negotiation module is specifically configured to:

Sending a delayed backoff request message to the relaying cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

Receiving the delayed backoff response message fed back by the cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the backoff of the working spectrum.

Preferably, the delayed backoff response message includes: whether to agree to delay the return of the indication information of the working spectrum; if the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is the delay The time required to delay the retreat included in the retreat request message; the spectrum retreat module is specifically configured to: after the time required to delay the retreat included in the delayed retreat request message, retreat the foregoing included in the delayed retreat request message The frequency and bandwidth of the working spectrum need to be delayed; if the cognitive radio system does not agree to delay the retreat of the working spectrum, the delay determined by the negotiation process is a predetermined forced back time; the spectrum back-off module is specifically used for : after the forced retreat time, relinquished in the working spectrum included in the delayed retreat request message To delay the frequency and bandwidth of the retreat.

Preferably, if the successive cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message includes: a time for allowing the delay to be withdrawn, and the delay time determined by the negotiation process is the time for allowing the delayed retreat ;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message includes: a forced backoff time, the delay time determined by the negotiation process is the forced backoff time, and the forced backoff time is less than The time allowed to delay the retreat.

Preferably, if the relaying cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message further includes: a frequency point and a bandwidth that allow the delayed retreat; the spectrum backoff module is specifically configured to: After allowing the time to delay the retreat, the frequency and bandwidth of the allowable delay of retreat are withdrawn;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the spectrum retreat module is specifically configured to: after the forced retreat time, retreat the required spectrum in the working spectrum included in the delayed retreat request message Delay the frequency and bandwidth of the concession.

Preferably, the delayed retreat request message further includes: the current cognitive radio system abandons the indication information of using the working spectrum within a predetermined time period after the time when the delay of the retreat is required; after the time required to delay the retreat And within the N time windows corresponding to the current cognitive radio system, the current cognitive radio system abandons the indication information of using the working spectrum; and/or requests the information that the cognitive radio system reduces the transmission power.

Preferably, if the relay cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message further includes: requesting the current cognitive radio system to abandon within a predetermined time period after a time when the delay of the retreat is required Using the indication information of the working spectrum; after the time required to delay the retreat, the current cognitive radio system requests the current cognitive radio system to abandon the indication information of using the working spectrum in the N time windows corresponding to the current cognitive radio system; and / Or, whether the replacement cognitive radio system agrees to reduce the transmission power information.

Preferably, after receiving the delayed backoff response message fed back by the cognitive radio system, the delayed backoff negotiation module is further configured to:

And delaying the retreat negotiation completion message to the relaying cognitive radio system, where the delayed retiring negotiation completion message is used to indicate that the delayed retreat negotiation process ends.

Based on the same inventive concept as the method, the embodiment of the present invention further provides a spectrum retreating device, including a processor and a radio frequency unit:

The processor is configured to: when determining that the current cognitive radio system cannot continue to occupy the working spectrum, initiate a negotiation process of delaying the retreat of the working spectrum by the radio unit to the relay cognitive radio system that needs to occupy the working spectrum; the delay determined in the negotiation process After the time, the working spectrum is withdrawn.

The technical solution provided by the embodiment of the present invention introduces a negotiation process of the delayed retreat working spectrum, and the current cognitive radio system retreats the working spectrum according to the delay time determined by the negotiation process, thereby avoiding the current cognitive radio system and replacing the cognitive wireless The electrical system is not working properly, which improves the efficiency of spectrum use.

Preferably, the processor is specifically configured to:

Sending a delayed backoff request message to the relaying cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

Receiving the delayed backoff response message fed back by the cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the backoff of the working spectrum.

Preferably, the delayed backoff response message includes: whether to agree to delay the return of the indication information of the working spectrum;

If the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a time required to delay the retreat included in the delayed retreat request message; the processor is specifically configured to: After the time required to delay the retreat included in the delayed retreat request message, the frequency and bandwidth of the working spectrum included in the delayed retreat request message that need to be delayed are retired;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a predetermined forced retreat time; the processor is specifically configured to: after the forced retreat time, the retreat The frequency and bandwidth of the working spectrum included in the delayed backoff request message that need to be delayed.

Preferably, if the successive cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message includes: a time for allowing the delay to be withdrawn, and the delay time determined by the negotiation process is the time for allowing the delayed retreat ;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message includes: a forced backoff time, the delay time determined by the negotiation process is the forced backoff time, and the forced backoff time is less than The time allowed to delay the retreat.

Preferably, if the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message further includes: a frequency point and a bandwidth that allow the delay of the retreat; the processor is specifically configured to: After delaying the time of the concession, the frequency and bandwidth of the allowable delay of the retreat are withdrawn;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the processor is specifically configured to: after the forced retreat time, delay in the working spectrum included in the retiring the delayed retreat request message The frequency and bandwidth of the concession.

Preferably, the delayed retreat request message further includes: the current cognitive radio system abandons the indication information of using the working spectrum within a predetermined time period after the time when the delay of the retreat is required; after the time required to delay the retreat And within the N time windows corresponding to the current cognitive radio system, the current cognitive radio system abandons the indication information of using the working spectrum; and/or requests the information that the cognitive radio system reduces the transmission power.

Preferably, if the relay cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message further includes: requesting the current cognitive radio system to abandon within a predetermined time period after a time when the delay of the retreat is required Using the indication information of the working spectrum; after the time required to delay the retreat, the current cognitive radio system Within the N time windows corresponding to the system, the current cognitive radio system is required to abandon the indication information of using the working spectrum; and/or the replacement cognitive radio system agrees to reduce the information of the transmission power.

Preferably, after receiving the delayed backoff response message fed back by the cognitive radio system, the processor is further configured to:

And delaying the retreat negotiation completion message to the relaying cognitive radio system, where the delayed retiring negotiation completion message is used to indicate that the delayed retreat negotiation process ends.

Based on the same inventive concept as the method, the embodiment of the present invention further provides a spectrum occupying device, including:

a delayed backoff negotiation module, configured to perform a negotiation process of delaying the retreating working spectrum with the current cognitive radio system when the cognitive radio system needs to occupy the working spectrum occupied by the current cognitive radio system;

The spectrum occupation module is configured to occupy the working spectrum after the delay time determined by the negotiation process.

The technical solution provided by the embodiment of the present invention introduces a negotiation process of the delayed retreat working spectrum, and takes over the working spectrum of the cognitive radio system according to the delay time determined by the negotiation process, so as to prevent the current cognitive radio system and the succeeding cognitive radio system from working normally. Improved spectrum efficiency.

Preferably, the delayed backoff negotiation module is specifically configured to:

Receiving a delayed backoff request message sent by the current cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

And delaying a backoff response message to the current cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the backoff of the working spectrum.

Preferably, the delayed backoff response message includes: whether to agree to delay the return of the indication information of the working spectrum; if the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is the delay The time required to delay the retreat included in the retreat request message; the spectrum occupation module is specifically configured to: after the time required to delay the retreat included in the delayed retreat request message, occupy the foregoing included in the delayed retreat request message The frequency and bandwidth of the working spectrum need to be delayed; if the cognitive cognitive system does not agree to delay the retreat of the working spectrum, the delay determined by the negotiation process is a predetermined forced back time; the spectrum occupancy module is specifically used for After the forced backoff time, the frequency and bandwidth of the working spectrum included in the delayed backoff request message that need to be delayed are occupied.

Preferably, if the successive cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message includes: a time for allowing the delay to be withdrawn, and the delay time determined by the negotiation process is the time for allowing the delayed retreat ;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message includes: a forced backoff time, the delay time determined by the negotiation process is the forced backoff time, and the forced backoff time is less than The time allowed to delay the retreat.

Preferably, if the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delayed rebate The response message further includes: a frequency point and a bandwidth that allow the delay of the retreat; the spectrum occupancy module is specifically configured to: occupy the frequency and bandwidth of the allowable delay retreat after the time of allowing the delayed retreat;

If the successor cognitive radio system does not agree to delay the retreat of the working spectrum, the spectrum occupancy module is specifically configured to: after the forced retreat time, occupy the required spectrum in the working spectrum included in the delayed retreat request message Delay the frequency and bandwidth of the concession.

Preferably, after the delayed backoff response message is fed back to the current cognitive radio system, the delayed backoff negotiation module is further configured to:

Receiving a delayed backoff negotiation completion message fed back by the current cognitive radio system, the delayed backoff negotiation completion message is used to indicate that the delayed backoff negotiation process ends.

Based on the same inventive concept as the method, the embodiment of the present invention further provides a spectrum occupying device, including a processor and a radio frequency unit:

The processor is configured to perform a negotiation process of delaying the retreat of the working spectrum by the radio unit and the current cognitive radio system when the cognitive radio system needs to occupy the working spectrum occupied by the current cognitive radio system; After the process determines the delay time, the working spectrum is occupied.

The technical solution provided by the embodiment of the present invention introduces a negotiation process of the delayed retreat working spectrum, and takes over the working spectrum of the cognitive radio system according to the delay time determined by the negotiation process, so as to prevent the current cognitive radio system and the succeeding cognitive radio system from working normally. Improved spectrum efficiency.

Preferably, the processor is specifically configured to:

Receiving a delayed backoff request message sent by the current cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

And delaying a backoff response message to the current cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the backoff of the working spectrum.

Preferably, the delayed backoff response message includes: whether to agree to delay the return of the indication information of the working spectrum;

If the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a time required to delay the retreat included in the delayed retreat request message; the processor is specifically configured to: After the time required to delay the backoff included in the delayed backoff request message, the frequency and bandwidth of the working spectrum included in the delayed backoff request message that need to be delayed are occupied;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a predetermined forced retreat time; the processor is specifically configured to: after the forced retreat time, occupy the location The frequency and bandwidth of the working spectrum included in the delayed backoff request message that need to be delayed.

Preferably, if the successive cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message includes: a time for allowing the delay to be withdrawn, and the delay time determined by the negotiation process is the time for allowing the delayed retreat ;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message includes: a forced backoff time, the delay time determined by the negotiation process is the forced backoff time, and the forced backoff time is less than The time allowed to delay the retreat.

Preferably, if the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message further includes: a frequency point and a bandwidth that allow the delay of the retreat; the processor is specifically configured to: After delaying the time of the retreat, occupying the frequency and bandwidth of the allowable delay of retreat;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the processor is specifically configured to: after the forced retreat time, occupy a delay in the working spectrum included in the delayed retreat request message The frequency and bandwidth of the concession.

Preferably, after feeding back the delayed backoff response message to the current cognitive radio system, the processor is further configured to:

Receiving a delayed backoff negotiation completion message fed back by the current cognitive radio system, the delayed backoff negotiation completion message is used to indicate that the delayed backoff negotiation process ends.

DRAWINGS

FIG. 1 is a flowchart of a spectrum backoff method according to an embodiment of the present invention;

2 is a flowchart of a spectrum occupation method according to an embodiment of the present invention;

3A is a first schematic diagram of a spectrum rebate device according to an embodiment of the present invention;

3B is a second schematic diagram of a spectrum rebate device according to an embodiment of the present invention;

4A is a first schematic diagram of a spectrum occupying apparatus according to an embodiment of the present invention;

FIG. 4B is a second schematic diagram of a spectrum occupying apparatus according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Before describing the embodiments of the present invention in detail, the concepts involved in the embodiments of the present invention are first described.

The CR system that is occupying spectrum resources is referred to as the current CR system.

The spectrum resources occupied by the CR system are called the working spectrum.

A CR system that needs to occupy the working spectrum of the current CR system is called a replacement CR system.

For example, in the access spectrum mode 2, the CR system that is occupying the spectrum resource is the current CR system, and is adopted. Mode 2 will occupy the current CR system working spectrum CR system to replace the CR system.

For example, in the above access spectrum mode three, the CR system 1 uses spectrum resources in the time window 1, and the CR system 2 uses the spectrum resources in the time window 2. If the CR system 1 is the current CR system, the CR system 1 ends in the time window 1. After entering the time window 2, the spectrum retreat is originally required, but the spectrum backoff cannot be completed (for example, there is no spare frequency point, the current bearer emergency service or the high priority). The level of service, etc.), then the CR system 2 takes over the CR system.

The functions of spectrum occupancy and spectrum backoff of the CR system are implemented by the control nodes in the system. The control node may be, but is not limited to, a base station (NodeB, eNodeB, etc.), an access point (AP), a user equipment as a cluster head, a relay, and the like.

For example, in a network coverage scenario, a cell, a base station to which it belongs, and user equipment in its coverage form a CR system, and the base station is a control node.

For example, in a no-network coverage scenario, device-to-device (D2D) communication user equipment constitutes a CR system. For group D2D communication scheduled by the cluster head, the cluster head is the control node.

The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

A spectrum reclaiming method provided by the embodiment of the present invention, as shown in FIG. 1 , specifically includes the following operations:

Step 100: Determine that the current CR system cannot continue to occupy the working spectrum, and initiate a negotiation process of delaying the retreating working spectrum to the relay CR system that needs to occupy the working spectrum.

How to determine that the current CR system cannot continue to occupy the working spectrum is not limited in the embodiment of the present invention, and any implementation that can be obtained by those skilled in the art without any creative work is applicable to the present invention. For example, when it is detected that the interference of the current CR system on the working spectrum exceeds a set threshold, it is determined that the current CR system cannot continue to occupy the working spectrum; the current CR system cannot work normally on the working spectrum (for example, the information cannot be correctly transmitted). It is determined that the current CR system cannot continue to occupy the working spectrum; the current CR system determines that it cannot continue to occupy the working spectrum after its corresponding time window ends.

The negotiation process of initiating a delayed retiring working spectrum to the relay CR system that needs to occupy the working spectrum actually refers to a negotiation process of delaying the retreating of the working spectrum to the control node that takes over the CR system.

Step 110: After the delay time determined by the negotiation process, the working spectrum is withdrawn.

The spectrum backoff method provided by the embodiment of the present invention is implemented by a control node in the current CR system.

The technical solution provided by the embodiment of the present invention introduces a negotiation process of the delayed retreat working spectrum. The current CR system retreats the working spectrum according to the delay time determined by the negotiation process, so that the current CR system and the succeeding CR system cannot work normally, and the spectrum use efficiency is improved.

In the embodiment of the present invention, there are various implementation manners for the negotiation process of the relay CR system that needs to occupy the working spectrum to initiate the delayed retreat of the working spectrum. A preferred implementation manner is as follows: sending a delayed backoff request message to the relay CR system, where the delayed backoff request message includes at least: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the retreat; receiving the succeeding CR Delayed backoff response message fed back by the system, the delayed backoff response message is used Indicate whether to agree to delay the transfer of the above working spectrum.

The frequency and the bandwidth that are required to be delayed in the delayed retreat request message may be all the frequency points and bandwidths corresponding to the working spectrum, or may be part of the frequency and bandwidth, and may be determined according to actual service requirements.

The control node of the current CR system may send a delayed backoff request message in a broadcast form. Correspondingly, the delayed backoff request message may further include identification information of the current CR system. The control node that takes over the CR system can determine whether to process the message according to the frequency and bandwidth in the delayed backoff request message; specifically, if the frequency and bandwidth in the delayed backoff request message are the frequency and bandwidth required to take over the CR system, Then, it is determined that the message needs to be processed, and then the current CR system is determined according to the identifier information of the current CR system carried in the delayed back request message, and the delayed backoff response message is fed back. If the delayed relinquish request message does not include the identification information of the current CR system, the successor CR system may determine the current CR system according to the source address and/or the source port number of the delayed retreat request message, and feed back a delayed backoff response message thereto.

The control node of the current CR system may also send a delayed backoff request message only to the control node of the relay CR system that needs to occupy its working spectrum. Optionally, the delayed backoff request message includes the identifier information of the current CR system; correspondingly, the succeeding CR system determines the current CR system according to the identifier information of the current CR system, and feeds back a delayed backoff response message thereto. If the delayed relinquish request message does not include the identification information of the current CR system, the successor CR system may determine the current CR system according to the source address and/or the source port number of the delayed retreat request message, and feed back a delayed backoff response message thereto.

The foregoing delayed retreat request message may further include: the current CR system abandons the indication information of using the working spectrum in a predetermined period of time after the time when the delay of the retreat is required; and the N times of the current CR system after the time of delaying the retreat is required Within the window, the current CR system abandons the indication of using the working spectrum; and/or requests information that takes over the CR system to reduce the transmit power.

The indication information that the current CR system gives up using the above working spectrum can be used as a reference for taking over the CR system to decide whether to agree to delay the retreat of the working spectrum. Of course, it can also be used to indicate that the replacement CR system can occupy the corresponding time period or time window. Working spectrum.

Wherein, the information requesting to replace the CR system to reduce the transmission power is used to request the relay CR system to reduce the transmission power during the delayed retreat period to reduce or avoid interference with the current CR system. The information may specifically be an identifier bit, and the value of the identifier bit indicates whether to request the succession of the CR system to reduce the transmission power, and may also include the value of the transmission power that needs to be replaced by the CR system.

The foregoing delayed backoff response message may include only the indication information of whether or not to agree to delay the retreat of the above working spectrum. Then, if the successor CR system agrees to delay the retreat of the above working spectrum, the delay time determined by the negotiation process is the time required to delay the retreat included in the delayed retreat request message. Correspondingly, the control node of the current CR system retreats the frequency and bandwidth of the working spectrum included in the delayed backoff request message, which needs to be delayed, after the time required to delay the retreat included in the delayed retreat request message. If the replacement CR system does not agree to delay the transfer of the above working spectrum, negotiated The delay determined by the process is the predetermined forced backoff time. Correspondingly, after the forced retreat time, the control node of the current CR system retreats the frequency and bandwidth of the working spectrum included in the delayed backoff request message that needs to be delayed.

The delayed backoff response message includes only the indication information of whether to agree to delay the revocation of the above working spectrum, and the signaling overhead can be reduced.

In another implementation manner, if the successor CR system agrees to delay the retreat of the working spectrum, the delayed backoff response message may include at least: a time for allowing the delayed retreat. Then, the delay time determined by the negotiation process is the time of allowing the delay to be retired included in the delayed backoff response message. On this basis, the delayed backoff response message may further include: a frequency point and a bandwidth that allow the delay to be withdrawn. Then, after the control node of the current CR system takes over the time that the CR system allows the delayed retreat, the retreat takes over the frequency and bandwidth of the CR system to allow the delay to be withdrawn. If the replacement CR system does not agree to delay the retreat of the above working spectrum, the delayed backoff response message may include at least: a mandatory backoff time. Then, the delay time determined by the negotiation process is the forced backoff time. In the embodiment of the present invention, the forced retreat time is less than the time allowed to delay the retreat. Correspondingly, after the forced retreat time, the current CR system retreats the frequency and bandwidth of the working spectrum included in the delayed backoff request message that needs to be delayed.

Among them, the time to take over the CR system to allow the delayed retreat may be the same as or different from the time when the current CR system requests a delayed retreat. The frequency and bandwidth at which the CR system is allowed to delay the retreat may be the same as or different from the frequency and bandwidth at which the current CR system requests a delayed retreat.

If the succeeding CR system agrees to delay the retreat of the working spectrum, the delayed backoff response message may further include: requesting the current CR system to abandon the indication information of using the working spectrum within a predetermined time period after the time when the delay of the retreat is required; Thereafter, within the N time windows corresponding to the current CR system, the current CR system is required to abandon the indication information of using the working spectrum; and/or, whether the CR system agrees to reduce the transmission power information.

The indication information that requires the current CR system to abandon the use of the working spectrum in a certain period of time or time window may be determined based on the indication information that the current CR system in the delayed retreat request message quits using the working spectrum, or may take over the CR. The system determines itself.

The information about whether the CR system agrees to reduce the transmit power may be determined based on the information in the delayed backoff request message to replace the CR system to reduce the transmit power, or may be determined by itself. The information of whether the CR system agrees to reduce the transmission power may be an identifier bit. Whether the value of the identifier bit is different indicates whether the transmission power is agreed to be reduced or a specific transmission power value. When the transmission power value is 0, the indication is that the difference is not lowered. Transmit power.

After receiving the delayed backoff response message fed back by the CR system, the control node of the current CR system may also feed back the delayed backoff negotiation completion message to the succeeding CR system, and the delayed backoff negotiation complete message is used to indicate the end of the delayed backoff negotiation process.

An embodiment of the present invention provides a spectrum occupation method, as shown in FIG. 2, which specifically includes the following operations:

Step 200: When the CR system needs to occupy the working spectrum occupied by the current CR system, perform a negotiation process of delaying the retreating working spectrum with the current CR system.

The negotiation process of the delayed retreat working spectrum with the current CR system actually refers to a negotiation process of delaying the retreating of the working spectrum with the control node of the current CR system.

Step 210: After the delay time determined by the negotiation process, occupy the working spectrum.

The spectrum occupancy method provided by the embodiment of the present invention is implemented by taking over the control node in the CR system.

The technical solution provided by the embodiment of the present invention introduces a negotiation process of the delayed retreat working spectrum, and takes over the working spectrum of the CR system according to the delay time determined by the negotiation process, so that the current CR system and the succeeding CR system cannot work normally, and the spectrum use efficiency is improved.

Preferably, the implementation process of the negotiation process of the delayed retiring working spectrum with the current CR system may be, but is not limited to:

The relay CR system receives the delayed retreat request message sent by the current CR system, and the delayed retreat request message includes: a frequency point and a bandwidth that need to be delayed in the working spectrum, and a time for delaying the retreat;

The successor CR system feeds back a delayed backoff response message to the current CR system, and the delayed backoff response message is used to indicate whether to agree to delay the fallback of the working spectrum.

Preferably, the delayed backoff response message may include: whether to agree to delay the transfer of the indication information of the working spectrum. Then, the delay time determined by the negotiation process is the time required to delay the backoff included in the delayed backoff request message. After the time that the CR system needs to delay the backoff included in the delayed backoff request message, the frequency and bandwidth of the working spectrum included in the delayed backoff request message need to be delayed.

Preferably, if the successor CR system agrees to delay the retreat of the working spectrum, the delayed backoff response message may include: allowing the time to delay the retreat. Then, the delay time determined by the negotiation process is the time allowed to delay the retreat.

On this basis, the delayed backoff response message may further include: a frequency point and a bandwidth that allow the delay to be withdrawn. Correspondingly, the replacement radio system takes up the frequency and bandwidth that allows the delay to be withheld after allowing the time to delay the retreat.

Preferably, if the succeeding CR system does not agree to delay the retreat of the working spectrum, the delayed backoff response message may include: a forced backoff time. Then, the delay time determined by the negotiation process is the forced backoff time. In the embodiment of the present invention, the forced retreat time is less than the time allowed to delay the retreat.

Correspondingly, after the forced retreat time, the replacement CR system occupies the frequency and bandwidth of the working spectrum included in the delayed retreat request message that needs to be delayed.

Preferably, the delayed retreat request message may further include: the current CR system relinquishes the indication information of using the working spectrum within a predetermined period of time after the time required to delay the retreat; after the time when the delay of the retreat is required, the current CR system corresponds to Within the N time windows, the current CR system abandons the indication of using the working spectrum; and/or requests information that takes over the CR system to reduce the transmit power.

Preferably, if the successor CR system agrees to delay the retreat of the working spectrum, the delayed backoff response message may further include: requesting the current CR system to abandon the indication information of using the working spectrum within a predetermined time period after the time required to delay the retreat; After the time of the delayed retreat, the current CR system requires the current CR within the corresponding N time windows. The system abandons the indication of using the working spectrum; and/or, takes over whether the CR system agrees to reduce the transmission power.

Preferably, after receiving the delayed backoff response message from the current CR system, the control node that receives the CR system may also receive a delayed backoff negotiation completion message fed back by the current CR system, and the delayed backoff negotiation complete message is used to indicate the end of the delayed backoff negotiation process.

The technical solutions provided by the embodiments of the present invention are described in detail below by taking the implementation of the current CR system and the successor CR system as an example.

scene one:

The CR system 1 and the CR system 2 preempt the spectrum resources according to the access spectrum mode 2 described above. Among them, the CR system 1 is a current CR system, and the CR system 2 is a succession CR system that will occupy the working spectrum of the CR system 1.

CR system 2 occupies the spectrum resources that CR system 1 is using, which is unfair to CR system 1, affecting the normal operation of CR system 1, especially when CR system 1 carries emergency services or high-priority services, spectrum cannot be immediately implemented. Concession. Therefore, the delayed backoff negotiation mechanism provided by the embodiment of the present invention can be introduced, as follows.

The control node of the CR system 1 determines that the CR system 1 cannot continue to occupy the working spectrum, and then initiates a negotiation process for delaying the retreating of the working spectrum to the control node of the CR system 2.

The control node of the CR system 1 can determine, but is not limited to, detecting that the interference received on the operating spectrum exceeds a predetermined interference threshold, cannot continue to operate on the operating spectrum, etc., to determine that the operating spectrum cannot continue to be occupied.

Optionally, the negotiation process is initiated after determining that both the CR system 1 and the CR system 2 have a delayed backoff negotiation protocol.

The negotiation process is as follows:

The control node of the CR system 1 transmits a delayed backoff request message to the control node of the CR system 2, and the information included in the delayed backoff request message is as shown in Table 1.

Table 1

Type of information	content
		Current CR system identification information	CR system 1
Frequency and bandwidth involved	F1, XMHz
		Need to delay the time of the concession	T_delay_request
Request commitment information	T
		Interference control level request	YdB
other

The identification information of the current CR system may be an ID number of the CR system (such as system ID + cell ID), or a number of the CR system (such as system 1, system 2, etc., the number is determined according to the number of systems that may be used in the frequency band) And pre-specified);

The frequency bandwidth information involved refers to the frequency f1 of the spectrum of the CR system 1 that is not intended to perform spectrum rebing. Use bandwidth XMHz;

The request commitment information means that the current CR system gives up the indication information of using the above working spectrum within a predetermined time period T after the time T_delay_request that needs to delay the retreat;

The interference control level request means that the CR system 2 is requested to reduce the system transmission power, thereby reducing the interference to the CR system 1, in dB.

After receiving the delayed retreat request message, the control node of the CR system 2 decides whether to agree to delay the retreat request according to the information carried in the delayed retreat request message, the information of the service priority of the CR system 2, the service duration, and the like. If you agree to delay the retreat request, you can further determine the time allowed to delay the retreat, allow the frequency and bandwidth of the deferred delay, and also determine the indication that the current CR system will abandon the use of the working spectrum within a predetermined period of time after the time when the delay is required to be withdrawn. Information, and whether or not you agree to reduce the transmit power.

Correspondingly, the control node of the CR system 2 feeds back the delayed backoff response message to the control node of the CR system 1, and the information included in the delayed backoff response message is as shown in Table 2.

Table 2

The identification information of the current CR system refers to the identification information of the CR system requesting the delayed remission, and may be the ID number of the CR system (such as system ID + cell ID), or the number of the CR system (such as system 1, system 2, etc., the number Determined according to the number of systems that may be used in this band, and specified in advance);

The frequency and bandwidth involved refer to the frequency and bandwidth used to allow the current CR system to delay the retreat;

The request commitment information means that, in the case that the CR system 2 allows the delay of the concession, the CR system 1 needs to abandon the frequency point f1 and the bandwidth X MHz for the spectrum use within the time period T after the T_delay_allow time;

The interference control level request refers to the transmission power (indicated in Table 2) that the CR system 2 allows itself to be reduced, in units of dB.

The control node of the CR system 1 receives the delayed backoff response message, and determines whether to process the delayed backoff response message according to the identification information of the current CR system therein.

If the identification information of the current CR system therein is the identification information of the CR system 1, the delayed response message is processed. Specifically, if the field of the delayed backoff request is Y, the control node of the CR system 1 needs to read the following information: the frequency and bandwidth involved, the allowed delay back time, the request commitment information, and the interference control. Level request and spectrum rebate after the allowed delayed backoff time. When it is agreed that the field of the delayed backoff request is N, the control node of the CR system 1 needs to read the following information: a forced backoff time, and after the forced backoff time, perform spectrum rebate.

Further, the control node of the CR system 1 feeds back a delayed backoff negotiation completion message to the control node of the CR system 2, and the content of the message includes Table 2.

Certainly, when receiving the delayed feedback response message and determining that the delayed feedback response message needs to be processed, the control node of the CR system 1 may determine whether to agree to the delayed return response message according to the information of the service priority, the service duration, and the like carried by the control node. The information carried in the spectrum is subjected to spectrum rebate. If the agreement is successful, the negotiation is successful, and the spectrum is relegated according to the information carried in the delayed backoff response message. Otherwise, the negotiation fails, and the spectrum is withdrawn after the scheduled forced withdrawal time.

Scene 2:

The CR system 1 and the CR system 2 occupy spectrum resources in accordance with the access spectrum mode described above. Among them, the time window 1 of the CR system 1 using the frequency point f1 is already full, and the occupation of the frequency point f1 needs to be occupied, and the CR system 2 (taking the CR system) occupies the frequency point f1 in the time window 2. However, since the CR system 1 carries the high-priority service, the spectrum cannot be immediately retired, and/or the CR system 1 and the CR system 2 have a concession negotiation/rescue protocol, and the CR system 1 and the CR system 2 initiate a delayed retreat negotiation mechanism, specifically as follows.

The control node of the CR system 1 determines that the CR system 1 cannot continue to occupy the working spectrum, and then initiates a negotiation process for delaying the retreating of the working spectrum to the control node of the CR system 2.

The control node of the CR system 1 can determine, but is not limited to, detecting that the interference received on the operating spectrum exceeds a predetermined interference threshold, cannot continue to operate on the operating spectrum, etc., to determine that the operating spectrum cannot continue to be occupied.

Optionally, the negotiation process is initiated after determining that both the CR system 1 and the CR system 2 have a delayed backoff negotiation protocol.

The negotiation process is as follows:

The control node of the CR system 1 transmits a delayed backoff request message to the control node of the CR system 1, and the information included in the delayed backoff request message is as shown in Table 3.

table 3

Type of information	content
		Current CR system identification information	CR system 1

Frequency and bandwidth involved	F1, XMHz
		Need to delay the time of the concession	T_delay_request
Request commitment information	2
		Interference control level request	YdB
other

The parameter explanation in Table 3 can refer to Table 1, except that in Table 3, the request commitment information refers to the CR system in the two time windows corresponding to the CR system 1 after the time T_delay_request that needs to be delayed. 1 Abandon the use of frequency f1 and XMHz bandwidth.

After receiving the delayed retreat request message, the control node of the CR system 2 decides whether to agree to delay the retreat request according to the information carried in the delayed retreat request message, the information of the service priority of the CR system 2, the service duration, and the like. If you agree to delay the retreat request, you can further determine the time allowed to delay the retreat, allow the frequency and bandwidth of the retreat to be delayed, and also determine the requirements within the two time windows corresponding to the CR system 1 after the time T_delay_request that requires the delay of the retreat. The current CR system abandons the indication of using the working spectrum and agrees to reduce the transmission power.

Correspondingly, the control node of the CR system 2 feeds back the delayed backoff response message to the control node of the CR system 1, and the information included in the delayed backoff response message is as shown in Table 4.

Table 4

The parameter explanation in Table 4 can be referred to Table 2, except that in Table 4, the request commitment information means that CR is required in the two time windows corresponding to the CR system 1 after the time T_delay_request that needs to be delayed. System 1 abandoned the use of frequency points f1 and XMHz bandwidth.

The control node of the CR system 1 receives the delayed backoff response message, according to the identification information of the current CR system therein, Determine whether to process the delayed backoff response message.

If the identification information of the current CR system therein is the identification information of the CR system 1, the delayed response message is processed. Specifically, if the field of the delayed backoff request is Y, the control node of the CR system 1 needs to read the following information: the frequency and bandwidth involved, the allowed delay back time, the request commitment information, and the interference control. Level request and spectrum rebate after the allowed delayed backoff time. When it is agreed that the field of the delayed backoff request is N, the control node of the CR system 1 needs to read the following information: a forced backoff time, and after the forced backoff time, perform spectrum rebate.

Further, the control node of the CR system 1 feeds back a delayed backoff negotiation completion message to the control node of the CR system 2, and the content of the message includes Table 2.

Certainly, when receiving the delayed feedback response message and determining that the delayed feedback response message needs to be processed, the control node of the CR system 1 may determine whether to agree to the delayed return response message according to the information of the service priority, the service duration, and the like carried by the control node. The information carried in the spectrum is subjected to spectrum rebate. If the agreement is successful, the negotiation is successful, and the spectrum is relegated according to the information carried in the delayed backoff response message. Otherwise, the negotiation fails, and the spectrum is withdrawn after the scheduled forced withdrawal time.

It should be noted that the embodiments of the above two application scenarios are described by taking two CR systems as an example. When multiple CR systems are involved, the processing is similar and the present invention will not be described again.

Based on the same inventive concept as the method, the embodiment of the present invention further provides a spectrum retreating device, as shown in FIG. 3A, specifically including:

The delayed backoff negotiation module 301 is configured to determine, when the current cognitive radio system cannot continue to occupy the working spectrum, initiate a negotiation process for delaying the retreat of the working spectrum to the relay cognitive radio system that needs to occupy the working spectrum;

The spectrum backoff module 302 is configured to retreat the working spectrum after the delay time determined by the negotiation process.

The technical solution provided by the embodiment of the present invention introduces a negotiation process of the delayed retreat working spectrum, and the current cognitive radio system retreats the working spectrum according to the delay time determined by the negotiation process, so that the current cognitive radio system and the succeeding cognitive radio system cannot work normally. Improved spectrum efficiency.

The spectrum rebate device provided by the embodiment of the present invention may be a control node in the current CR system, or may be a hardware structure or a function module in a control node in the current CR system.

Preferably, the delayed backoff negotiation module 301 is specifically configured to:

Sending a delayed backoff request message to the relaying cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

Receiving the delayed backoff response message fed back by the cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the backoff of the working spectrum.

Preferably, the delayed backoff response message includes: whether to agree to delay the return of the indication information of the working spectrum; if the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is Deferred backoff request message includes a time required to delay the retreat; the spectrum backoff module 301 is specifically configured to: after the time required to delay the retreat included in the delayed retreat request message, the retreat of the delayed retreat request message includes The frequency and bandwidth of the working spectrum in which the delay is required to be retired; if the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a predetermined forced back time; the spectrum backoff module Specifically, after the forced retreat time, the frequency and bandwidth of the working spectrum included in the delayed retreat request message that need to be delayed are retired.

Preferably, if the successive cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message includes: a time for allowing the delay to be withdrawn, and the delay time determined by the negotiation process is the time for allowing the delayed retreat ;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message includes: a forced backoff time, the delay time determined by the negotiation process is the forced backoff time, and the forced backoff time is less than The time allowed to delay the retreat.

Preferably, if the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message further includes: a frequency point and a bandwidth that allow the delayed retreat; the spectrum backoff module 302 is specifically configured to: After the time allowed to delay the retreat, the frequency and bandwidth of the allowable delay retreat are withdrawn;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the spectrum backoff module 302 is specifically configured to: after the forced retreat time, retreat in the working spectrum included in the delayed backoff request message Need to delay the frequency and bandwidth of the concession.

Preferably, the delayed retreat request message further includes: the current cognitive radio system abandons the indication information of using the working spectrum within a predetermined time period after the time when the delay of the retreat is required; after the time required to delay the retreat And within the N time windows corresponding to the current cognitive radio system, the current cognitive radio system abandons the indication information of using the working spectrum; and/or requests the information that the cognitive radio system reduces the transmission power.

Preferably, if the relay cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message further includes: requesting the current cognitive radio system to abandon within a predetermined time period after a time when the delay of the retreat is required Using the indication information of the working spectrum; after the time required to delay the retreat, the current cognitive radio system requests the current cognitive radio system to abandon the indication information of using the working spectrum in the N time windows corresponding to the current cognitive radio system; and / Or, whether the replacement cognitive radio system agrees to reduce the transmission power information.

Preferably, after receiving the delayed backoff response message fed back by the cognitive radio system, the delayed backoff negotiation module 302 is further configured to:

And delaying the retreat negotiation completion message to the relaying cognitive radio system, where the delayed retiring negotiation completion message is used to indicate that the delayed retreat negotiation process ends.

Based on the same inventive concept as the method, as shown in FIG. 3B, the embodiment of the present invention further provides a spectrum retreating device, including a processor 30 and a radio frequency unit 31:

The processor 30 is configured to: when determining that the current cognitive radio system cannot continue to occupy the working spectrum, initiate a negotiation process of delaying the retreat of the working spectrum by the radio frequency unit 31 to the relay cognitive radio system that needs to occupy the working spectrum; After the delay time, the work spectrum is withdrawn.

The technical solution provided by the embodiment of the present invention introduces a negotiation process of the delayed retreat working spectrum, and the current cognitive radio system retreats the working spectrum according to the delay time determined by the negotiation process, so that the current cognitive radio system and the succeeding cognitive radio system cannot work normally. Improved spectrum efficiency.

Preferably, the processor 30 is specifically configured to:

Sending a delayed backoff request message to the relaying cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

Receiving the delayed backoff response message fed back by the cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the backoff of the working spectrum.

Preferably, the delayed backoff response message includes: whether to agree to delay the return of the indication information of the working spectrum;

If the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a time required to delay the retreat included in the delayed retreat request message; the processor 30 is specifically configured to: After the time required to delay the retreat included in the delayed retreat request message, the frequency and bandwidth of the working spectrum included in the delayed retreat request message that need to be delayed are retired;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a predetermined forced retreat time; the processor 30 is specifically configured to: after the forced retreat time, the concession The frequency and bandwidth of the working spectrum included in the delayed backoff request message that need to be delayed.

Preferably, if the successive cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message includes: a time for allowing the delay to be withdrawn, and the delay time determined by the negotiation process is the time for allowing the delayed retreat ;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message includes: a forced backoff time, the delay time determined by the negotiation process is the forced backoff time, and the forced backoff time is less than The time allowed to delay the retreat.

Preferably, if the relaying cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message further includes: a frequency point and a bandwidth that allow the delay of the retreat; the processor 30 is specifically configured to: After allowing the time to delay the retreat, the frequency and bandwidth of the allowable delay of retreat are withdrawn;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the processor 30 is specifically configured to: after the forced retreat time, retreat the required spectrum in the working spectrum included in the delayed retreat request message Delay the frequency and bandwidth of the concession.

Preferably, the delayed retreat request message further includes: the current cognitive radio system abandons the indication information of using the working spectrum within a predetermined time period after a time when the delay of the retreat is required; and the time when the retreat is required to be delayed Then, within the N time windows corresponding to the current cognitive radio system, the current cognitive radio system abandons the indication information of using the working spectrum; and/or requests the information that the cognitive radio system reduces the transmission power.

Preferably, if the relay cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message further includes: requesting the current cognitive radio system to abandon within a predetermined time period after a time when the delay of the retreat is required Using the indication information of the working spectrum; after the time required to delay the retreat, the current cognitive radio system requests the current cognitive radio system to abandon the indication information of using the working spectrum in the N time windows corresponding to the current cognitive radio system; and / Or whether the replacement cognitive radio system agrees to reduce the information of the transmission power.

Preferably, after receiving the delayed backoff response message fed back by the cognitive radio system, the processor 30 is further configured to:

And delaying the retreat negotiation completion message to the relaying cognitive radio system, where the delayed retiring negotiation completion message is used to indicate that the delayed retreat negotiation process ends.

Based on the same inventive concept as the method, the embodiment of the present invention further provides a spectrum occupying device, as shown in FIG. 4A, specifically including:

The delayed backoff negotiation module 401 is configured to perform a negotiation process of delaying the retreat working spectrum with the current cognitive radio system when the cognitive radio system needs to occupy the working spectrum occupied by the current cognitive radio system;

The spectrum occupation module 402 is configured to occupy the working spectrum after the delay time determined by the negotiation process.

The technical solution provided by the embodiment of the present invention introduces a negotiation process of the delayed retreat working spectrum, and takes over the working spectrum of the cognitive radio system according to the delay time determined by the negotiation process, so as to prevent the current cognitive radio system and the succeeding cognitive radio system from working normally. Improved spectrum efficiency.

The spectrum occupying device provided by the embodiment of the present invention may be a control node in the CR system, or may be a hardware structure or a function module in the control node in the CR system.

Preferably, the delayed backoff negotiation module 401 is specifically configured to:

Receiving a delayed backoff request message sent by the current cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

And delaying a backoff response message to the current cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the backoff of the working spectrum.

Preferably, the delayed backoff response message includes: whether to agree to delay the return of the indication information of the working spectrum; if the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is the delay The time required to delay the retreat included in the retreat request message; the spectrum occupation module 402 is specifically configured to: after the time required to delay the retreat included in the delayed retreat request message, occupy the location included in the delayed retreat request message The frequency and bandwidth of the working spectrum in which the delay is required to be retired; if the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a predetermined forced back time; the spectrum occupying module 402 is specific For: occupying the work included in the delayed backoff request message after the forced backoff time Frequency and bandwidth in the spectrum that require delayed backoff.

Preferably, if the successive cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message includes: a time for allowing the delay to be withdrawn, and the delay time determined by the negotiation process is the time for allowing the delayed retreat ;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message includes: a forced backoff time, the delay time determined by the negotiation process is the forced backoff time, and the forced backoff time is less than The time allowed to delay the retreat.

Preferably, if the successive cognitive radio system agrees to delay the retreat of the working spectrum, the delayed retreat response message further includes: a frequency point and a bandwidth that allow the delay of the retreat; the spectrum occupation module 402 is specifically configured to: After the time allowed to delay the retreat, occupying the frequency and bandwidth of the allowable delay retreat;

If the successor cognitive radio system does not agree to delay the retreat of the working spectrum, the spectrum occupation module 402 is specifically configured to: occupy the working spectrum included in the delayed retreat request message after the forced retreat time Need to delay the frequency and bandwidth of the concession.

Preferably, after the delayed return response message is fed back to the current cognitive radio system, the delayed backoff negotiation module 401 is further configured to:

Receiving a delayed backoff negotiation completion message fed back by the current cognitive radio system, the delayed backoff negotiation completion message is used to indicate that the delayed backoff negotiation process ends.

Based on the same inventive concept as the method, as shown in FIG. 4B, the embodiment of the present invention further provides a spectrum occupying apparatus, including a processor 40 and a radio frequency unit 41:

The processor 40 is configured to perform a negotiation process of delaying the retreat of the working spectrum by the radio frequency unit 41 and the current cognitive radio system when the cognitive radio system needs to occupy the working spectrum occupied by the current cognitive radio system; After the delay time determined by the negotiation process, the working spectrum is occupied.

Preferably, the processor 40 is specifically configured to:

Receiving a delayed backoff request message sent by the current cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

And delaying a backoff response message to the current cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the backoff of the working spectrum.

Preferably, the delayed backoff response message includes: whether to agree to delay the return of the indication information of the working spectrum;

If the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a time required to delay the retreat included in the delayed retreat request message; the processor 40 is specifically configured to: After the time required to delay the retreat included in the delayed retreat request message, the frequency and bandwidth of the working spectrum included in the delayed retreat request message that need to be delayed are occupied;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delay determined by the negotiation process The late time is a predetermined forced retreat time; the processor 40 is specifically configured to: after the forced retreat time, occupy a frequency point and a bandwidth of the working spectrum included in the delayed retreat request message that need to be delayed.

Preferably, if the successive cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message includes: a time for allowing the delay to be withdrawn, and the delay time determined by the negotiation process is the time for allowing the delayed retreat ;

If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message includes: a forced backoff time, the delay time determined by the negotiation process is the forced backoff time, and the forced backoff time is less than The time allowed to delay the retreat.

Preferably, if the relaying cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message further includes: a frequency point and a bandwidth that allow the delay of the retreat; the processor 40 is specifically configured to: After allowing the time to delay the retreat, occupying the frequency and bandwidth of the allowable delay of retreat;

If the replacement cognitive radio system does not agree to delay the retreat of the working spectrum, the processor 40 is specifically configured to: after the forced retreat time, occupy the required spectrum in the working spectrum included in the delayed retreat request message Delay the frequency and bandwidth of the concession.

Preferably, after feeding back the delayed backoff response message to the current cognitive radio system, the processor 40 is further configured to:

Receiving a delayed backoff negotiation completion message fed back by the current cognitive radio system, the delayed backoff negotiation completion message is used to indicate that the delayed backoff negotiation process ends.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The device is implemented in a flow or a flow or a block diagram of a block or multiple The function specified in the box.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims (44)

1. A spectrum retreat method, comprising:

   Determining, when the current cognitive radio system cannot continue to occupy the working spectrum, initiating a negotiation process for delaying the retreat of the working spectrum to the relay cognitive radio system that needs to occupy the working spectrum;

   After the delay time determined by the negotiation process, the working spectrum is withdrawn.
2. The method according to claim 1, wherein the negotiating process for initiating a delayed retiring working spectrum to the relay cognitive radio system that needs to occupy the working spectrum comprises:

   Sending a delayed backoff request message to the relaying cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

   Receiving the delayed backoff response message fed back by the cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the backoff of the working spectrum.
3. The method according to claim 2, wherein the delayed backoff response message comprises: whether to agree to delay the return of the indication information of the working spectrum;

   If the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a time required to delay the retreat included in the delayed retreat request message; after the delay time determined by the negotiation process, the concession The working spectrum includes: a frequency and a bandwidth that need to be delayed in the working spectrum included in the delayed backoff request message after the time that the delayed backoff is included in the delayed backoff request message;

   If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a predetermined forced back time; after the delay time determined by the negotiation process, the working spectrum is withdrawn, including: After the forced backoff time, the frequency and bandwidth of the working spectrum included in the delayed backoff request message that needs to be delayed are reserved.
4. The method of claim 2, wherein if the relaying cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message includes: a time to allow a delayed backoff, the delay determined by the negotiation process Time is the time allowed to delay the retreat;

   If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message includes: a forced backoff time, the delay time determined by the negotiation process is the forced backoff time, and the forced backoff time is less than The time allowed to delay the retreat.
5. The method according to claim 4, wherein if the relay cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message further includes: a frequency point and a bandwidth that allow the delay of the retreat; After the delay time determined by the negotiation process, the working spectrum is retired, including: after the time of allowing the delayed retreat, the frequency and bandwidth of the allowable delay retreat are withdrawn;

   If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the negotiation process is indeed After the predetermined delay time, the working spectrum is retired, including: after the forced backoff time, the frequency and bandwidth of the working spectrum included in the delayed backoff request message that need to be delayed.
6. The method according to claim 2, wherein the delayed retreat request message further comprises: the current cognitive radio system giving up the indication of using the working spectrum within a predetermined time period after a time when the delay of the retreat is required Information; the current cognitive radio system abandons indication information for using the working spectrum within N time windows corresponding to the current cognitive radio system after a time delay of retreat; and/or requests the relay cognitive radio The system reduces the information of the transmit power.
7. The method according to claim 4, wherein if the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message further comprises: within a predetermined time period after a time when the delay of the retreat is required, Requiring the current cognitive radio system to abandon the indication information of using the working spectrum; after the time required to delay the retreat, the current cognitive radio system requests the current cognitive radio system to abandon within N time windows corresponding to the current cognitive radio system Using indication information of the working spectrum; and/or, whether the replacement cognitive radio system agrees to reduce the transmission power information.
8. The method according to claim 2, wherein after receiving the delayed backoff response message fed back by the cognitive radio system, the method further comprises:

   And delaying the retreat negotiation completion message to the relaying cognitive radio system, where the delayed retiring negotiation completion message is used to indicate that the delayed retreat negotiation process ends.
9. A spectrum occupancy method, comprising:

   A process of negotiating a delayed retreat working spectrum with the current cognitive radio system when the cognitive radio system needs to occupy the working spectrum occupied by the current cognitive radio system;

   After the delay time determined by the negotiation process, the working spectrum is occupied.
10. The method according to claim 9, wherein the negotiation process of the delayed retiring working spectrum with the current cognitive radio system comprises:

    Receiving a delayed backoff request message sent by the current cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

    And delaying a backoff response message to the current cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the backoff of the working spectrum.
11. The method according to claim 10, wherein the delayed backoff response message comprises: whether to agree to delay the return of the indication information of the working spectrum;

    If the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a time required to delay the retreat included in the delayed retreat request message; the delay determined in the negotiation process After the time, the working spectrum is occupied, including: after the time required to delay the retreat included in the delayed retreat request message, occupying the frequency of the working spectrum included in the delayed retreat request message and requiring a delayed retreat Belt width;

    If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a predetermined forced back time; after the delay time determined by the negotiation process, the working spectrum is occupied. The method includes: after the forced retreat time, occupying a frequency point and a bandwidth that need to be delayed in the working spectrum included in the delayed retreat request message.
12. The method of claim 10, wherein if the relaying cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message includes: a time to allow a delayed backoff, the delay determined by the negotiation process Time is the time allowed to delay the retreat;

    If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message includes: a forced backoff time, the delay time determined by the negotiation process is the forced backoff time, and the forced backoff time is less than The time allowed to delay the retreat.
13. The method according to claim 12, wherein if the relaying cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message further includes: a frequency point and a bandwidth allowing the delayed retreat; After the delay time determined by the negotiation process, occupying the working spectrum includes: occupying the frequency and bandwidth of the allowable delay retreat after the time for allowing the delayed retreat;

    If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, after the delay time determined by the negotiation process, occupying the working spectrum, including: after the forced retreat time, occupying the delayed retreat request The frequency and bandwidth of the working spectrum included in the message that require delayed backoff.
14. The method according to claim 10, wherein the delayed backoff request message further comprises: the current cognitive radio system giving up the indication of using the working spectrum within a predetermined time period after a time when the delay of the retreat is required Information; the current cognitive radio system abandons indication information for using the working spectrum within N time windows corresponding to the current cognitive radio system after a time delay of retreat; and/or requests the relay cognitive radio The system reduces the information of the transmit power.
15. The method according to claim 12, wherein if the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delayed backoff response message further comprises: within a predetermined time period after a time when the delay of the retreat is required, Requiring the current cognitive radio system to abandon the indication information of using the working spectrum; after the time required to delay the retreat, the current cognitive radio system requests the current cognitive radio system to abandon within N time windows corresponding to the current cognitive radio system Using indication information of the working spectrum; and/or, whether the replacement cognitive radio system agrees to reduce the transmission power information.
16. The method of claim 10, after the feedback of the delayed backoff response message to the current cognitive radio system, the method further comprises:

    Receiving a delayed backoff negotiation completion message fed back by the current cognitive radio system, the delayed backoff negotiation completion message is used to indicate that the delayed backoff negotiation process ends.
17. A spectrum retreating device, comprising:

    a delayed backoff negotiation module, configured to determine a negotiation process for initiating a delayed retreat working spectrum to a relay cognitive radio system that needs to occupy the working spectrum when the current cognitive radio system cannot continue to occupy the working spectrum;

    The spectrum backoff module is configured to retreat the working spectrum after the delay time determined by the negotiation process.
18. The apparatus according to claim 17, wherein the delayed backoff negotiation module is specifically configured to:

    Sending a delayed backoff request message to the relaying cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

    Receiving the delayed backoff response message fed back by the cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the backoff of the working spectrum.
19. The apparatus according to claim 18, wherein the delayed backoff response message comprises: whether to agree to delay the return of the indication information of the working spectrum;

    If the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a time required to delay the retreat included in the delayed retreat request message; the spectrum rebate module is specifically configured to: After the time required to delay the retreat included in the delayed retreat request message, the frequency and bandwidth of the working spectrum included in the delayed retreat request message that need to be delayed are retired;

    If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a predetermined forced retreat time; the spectrum rebate module is specifically configured to: after the forced retreat time, the concession The frequency and bandwidth of the working spectrum included in the delayed backoff request message that need to be delayed.
20. The apparatus according to claim 18, wherein if said successive cognitive radio system agrees to delay the retreat of said working spectrum, said delayed backoff response message includes: a time to allow a delayed backoff, said negotiation process determines a delay Time is the time allowed to delay the retreat;

    If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message includes: a forced backoff time, the delay time determined by the negotiation process is the forced backoff time, and the forced backoff time is less than The time allowed to delay the retreat.
21. The apparatus according to claim 20, wherein if said relay cognitive radio system agrees to delay the retreat of said working spectrum, said delayed backoff response message further comprises: a frequency point and a bandwidth allowing delay of the rebate; said spectrum The retreat module is specifically configured to: retreat the frequency and bandwidth of the allowable delay retreat after the time for allowing the delayed retreat;

    If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the spectrum retreat module is specifically configured to: after the forced retreat time, retreat the required spectrum in the working spectrum included in the delayed retreat request message Delay the frequency and bandwidth of the concession.
22. The apparatus according to claim 18, wherein the delayed backoff request message further comprises: the current cognitive radio system abandoning the use of the working frequency within a predetermined time period after a time when the delay of the retreat is required The indication information of the spectrum; after the time required to delay the retreat, within the N time windows corresponding to the current cognitive radio system, the current cognitive radio system abandons the indication information of using the working spectrum; and/or requests the replacement Cognitive radio systems reduce the information on transmit power.
23. The apparatus according to claim 20, wherein, if said succeeding cognitive radio system agrees to delay the retreat of said working spectrum, said delayed backoff response message further comprises: within a predetermined period of time after a time required to delay the retreat, Requiring the current cognitive radio system to abandon the indication information of using the working spectrum; after the time required to delay the retreat, the current cognitive radio system requests the current cognitive radio system to abandon within N time windows corresponding to the current cognitive radio system Using indication information of the working spectrum; and/or whether the replacement cognitive radio system agrees to reduce the transmission power information.
24. The apparatus according to claim 18, wherein after receiving the delayed backoff response message fed back by the cognitive radio system, the delayed backoff negotiation module is further configured to:

    And delaying the retreat negotiation completion message to the relaying cognitive radio system, where the delayed retiring negotiation completion message is used to indicate that the delayed retreat negotiation process ends.
25. A spectrum occupying device, comprising:

    a delayed backoff negotiation module, configured to perform a negotiation process of delaying the retreating working spectrum with the current cognitive radio system when the cognitive radio system needs to occupy the working spectrum occupied by the current cognitive radio system;

    The spectrum occupation module is configured to occupy the working spectrum after the delay time determined by the negotiation process.
26. The apparatus according to claim 25, wherein the delayed backoff negotiation module is specifically configured to:

    Receiving a delayed backoff request message sent by the current cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

    And delaying a backoff response message to the current cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the backoff of the working spectrum.
27. The apparatus according to claim 26, wherein the delayed backoff response message comprises: whether to agree to delay the return of the indication information of the working spectrum;

    If the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a time required to delay the retreat included in the delayed retreat request message; the spectrum occupation module is specifically configured to: After the time required to delay the retreat included in the delayed retreat request message, the frequency and bandwidth of the working spectrum included in the delayed retreat request message that need to be delayed are occupied;

    If the replacement cognitive radio system does not agree to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a predetermined forced retreat time; the spectrum occupation module is specifically configured to: occupy after the forced retreat time The frequency and bandwidth of the working spectrum included in the delayed backoff request message that need to be delayed.
28. The apparatus according to claim 26, wherein if said relay cognitive radio system agrees to delay the retreat of said working spectrum, said delayed backoff response message includes: allowing time for delaying the retreat, said negotiating The delay time determined by the process is the time for allowing the delay to be withdrawn;

    If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message includes: a forced backoff time, the delay time determined by the negotiation process is the forced backoff time, and the forced backoff time is less than The time allowed to delay the retreat.
29. The apparatus according to claim 28, wherein if said relay cognitive radio system agrees to delay the retreat of said working spectrum, said delayed backoff response message further comprises: a frequency point and a bandwidth allowing delay of the rebate; said spectrum The occupant module is specifically configured to: occupy the frequency and bandwidth of the allowable delay retreat after the time for allowing the delayed retreat;

    If the successor cognitive radio system does not agree to delay the retreat of the working spectrum, the spectrum occupancy module is specifically configured to: after the forced retreat time, occupy the required spectrum in the working spectrum included in the delayed retreat request message Delay the frequency and bandwidth of the concession.
30. The apparatus according to claim 26, wherein after the delaying the backoff response message is fed back to the current cognitive radio system, the delayed backoff negotiation module is further configured to:

    Receiving a delayed backoff negotiation completion message fed back by the current cognitive radio system, the delayed backoff negotiation completion message is used to indicate that the delayed backoff negotiation process ends.
31. A spectrum retreating device, comprising: a processor and a radio frequency unit:

    The processor is configured to: when determining that the current cognitive radio system cannot continue to occupy the working spectrum, initiate a negotiation process of delaying the retreat of the working spectrum by the radio unit to the relay cognitive radio system that needs to occupy the working spectrum; the delay time determined in the negotiation process After that, the work spectrum is withdrawn.
32. The device according to claim 31, wherein the processor is specifically configured to:

    Sending a delayed backoff request message to the relaying cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

    Receiving the delayed backoff response message fed back by the cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the backoff of the working spectrum.
33. The apparatus according to claim 32, wherein the delayed backoff response message comprises: whether to agree to delay the return of the indication information of the working spectrum;

    If the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a time required to delay the retreat included in the delayed retreat request message; the processor is specifically configured to: After the time required to delay the retreat included in the delayed retreat request message, the frequency and bandwidth of the working spectrum included in the delayed retreat request message that need to be delayed are retired;

    If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a predetermined forced retreat time; the processor is specifically configured to: after the forced retreat time, the retreat The frequency and bandwidth of the working spectrum included in the delayed backoff request message that need to be delayed.
34. The apparatus according to claim 32, wherein if said succeeding cognitive radio system agrees to delay the retreat of said working spectrum, said delayed backoff response message includes: a time for allowing a delayed backoff, said negotiation process determining a delay Time is the time allowed to delay the retreat;

    If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message includes: a forced backoff time, the delay time determined by the negotiation process is the forced backoff time, and the forced backoff time is less than The time allowed to delay the retreat.
35. The apparatus according to claim 34, wherein if said relay cognitive radio system agrees to delay the retreat of said working spectrum, said delayed backoff response message further comprises: a frequency point and a bandwidth allowing delay of the rebate; said processing The device is specifically configured to: after the time of allowing the delayed retreat, to retreat the frequency and bandwidth of the allowable delay retreat;

    If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the processor is specifically configured to: after the forced retreat time, delay in the working spectrum included in the retiring the delayed retreat request message The frequency and bandwidth of the concession.
36. The apparatus according to claim 32, wherein the delayed backoff request message further comprises: the current cognitive radio system giving up the indication of using the working spectrum within a predetermined time period after a time when the delay of the retreat is required Information; the current cognitive radio system abandons indication information for using the working spectrum within N time windows corresponding to the current cognitive radio system after a time delay of retreat; and/or requests the relay cognitive radio The system reduces the information of the transmit power.
37. The apparatus according to claim 34, wherein, if said succeeding cognitive radio system agrees to delay the retreat of said working spectrum, said delayed backoff response message further comprises: within a predetermined period of time after a time required to delay the backoff, Requiring the current cognitive radio system to abandon the indication information of using the working spectrum; after the time required to delay the retreat, the current cognitive radio system requests the current cognitive radio system to abandon within N time windows corresponding to the current cognitive radio system Using indication information of the working spectrum; and/or whether the replacement cognitive radio system agrees to reduce the transmission power information.
38. The apparatus according to claim 32, wherein after receiving the delayed backoff response message fed back by the cognitive radio system, the processor is further configured to:

    And delaying the retreat negotiation completion message to the relaying cognitive radio system, where the delayed retiring negotiation completion message is used to indicate that the delayed retreat negotiation process ends.
39. A spectrum occupying device, comprising: a processor and a radio frequency unit:

    The processor is configured to perform a negotiation process of delaying the retreat of the working spectrum with the current cognitive radio system by the radio frequency unit when the cognitive radio system needs to occupy the working spectrum occupied by the current cognitive radio system; After the delay time determined by the negotiation process, the working spectrum is occupied.
40. The device according to claim 39, wherein the processor is specifically configured to:

    Receiving a delayed backoff request message sent by the current cognitive radio system, where the delayed backoff request message includes: a frequency point and a bandwidth in the working spectrum that need to be delayed, and a time to delay the backoff;

    And delaying a backoff response message to the current cognitive radio system, the delayed backoff response message is used to indicate whether to agree to delay the backoff of the working spectrum.
41. The apparatus according to claim 40, wherein the delayed backoff response message comprises: whether to agree to delay the return of the indication information of the working spectrum;

    If the succeeding cognitive radio system agrees to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a time required to delay the retreat included in the delayed retreat request message; the processor is specifically configured to: After the time required to delay the backoff included in the delayed backoff request message, the frequency and bandwidth of the working spectrum included in the delayed backoff request message that need to be delayed are occupied;

    If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delay time determined by the negotiation process is a predetermined forced retreat time; the processor is specifically configured to: after the forced retreat time, occupy the location The frequency and bandwidth of the working spectrum included in the delayed backoff request message that need to be delayed.
42. The apparatus according to claim 40, wherein if said succeeding cognitive radio system agrees to delay the retreat of said working spectrum, said delayed backoff response message includes: a time for allowing a delayed backoff, said decision process determining a delay Time is the time allowed to delay the retreat;

    If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the delayed backoff response message includes: a forced backoff time, the delay time determined by the negotiation process is the forced backoff time, and the forced backoff time is less than The time allowed to delay the retreat.
43. The apparatus according to claim 42, wherein if said succeeding cognitive radio system agrees to delay the retreat of said working spectrum, said delayed backoff response message further comprises: a frequency point and a bandwidth allowing delay of the rebate; said processing The device is specifically configured to: occupy the frequency and bandwidth of the allowable delay retreat after the time for allowing the delayed retreat;

    If the succeeding cognitive radio system does not agree to delay the retreat of the working spectrum, the processor is specifically configured to: after the forced retreat time, occupy a delay in the working spectrum included in the delayed retreat request message The frequency and bandwidth of the concession.
44. The apparatus of claim 40, wherein after feeding back the delayed backoff response message to the current cognitive radio system, the processor is further configured to:

    Receiving a delayed backoff negotiation completion message fed back by the current cognitive radio system, the delayed backoff negotiation completion message is used to indicate that the delayed backoff negotiation process ends.

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