WO2014206252A1 - 认知无线电系统中的传输调度方法和装置 - Google Patents
认知无线电系统中的传输调度方法和装置 Download PDFInfo
- Publication number
- WO2014206252A1 WO2014206252A1 PCT/CN2014/080483 CN2014080483W WO2014206252A1 WO 2014206252 A1 WO2014206252 A1 WO 2014206252A1 CN 2014080483 W CN2014080483 W CN 2014080483W WO 2014206252 A1 WO2014206252 A1 WO 2014206252A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spectrum
- transmission
- frequency point
- terminal
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
Definitions
- the present application relates to the field of wireless communications, and in particular, to a transmission scheduling method and apparatus in a cognitive radio system. Background technique
- Radio communication frequency 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 the wireless communication spectrum. Studies have found that certain frequency bands (such as TV bands) are not used most of the time or are not used in most areas, and some bands have multiple systems and multiple users competing at the same time, that is, certain services. A system with a large carrying capacity does not have enough spectrum resources, while another system with a small amount of traffic carries too much resources.
- CR Recognition Radio
- the basic idea is: Under the premise of not causing interference to the authorization system, the sensing system can be dynamically monitored by monitoring changes in the current wireless environment. Select a blank band for communication.
- the perception system When the perception system is opportunistic to use the white space of the authorization system, it is a basic premise to protect the authorization system from interference. This protection mainly includes the following two aspects:
- the sensing system accurately determines which licensed system frequency bands are available white space bands (inducing the sensing system on these frequency bands does not affect the normal operation of the authorized system);
- the base station of the sensing system detects the strength of the signal of the authorized system in a certain frequency band through a perceptual algorithm.
- the strength of the signal is greater than a certain threshold, the distance between the base station and the authorized system using the frequency band is considered to be Recently, the introduction of a sensing system in this frequency band will have an impact on the normal operation of the authorized system, so the frequency band is not available;
- the sensing system directly reads information from a local database for a specific location and which frequency bands can be used. According to relevant research, the use efficiency of radio and television frequency bands is not high. Considering the comprehensive transformation of analog TV to digital TV, a large number of radio and television frequency bands will be spared. According to the relevant test results, China's radio and television frequency bands also exist. Large space that can be exploited again.
- the ITU International Telecommunication Union
- LTE Long Term Evolution
- Some of these bands are occupied by time-frequency (video), some are occupied by the military (such as the military's radar system), and the government level (dance planning, so how to use the band in the LTE system is also a problem.
- Some organizations have proposed The use of this band during the transition period can be achieved by means of a cognitive radio.
- the CR system opportunistic use of the white space is based on the premise that once the authorization system is re-appeared, the CR system should retreat to the frequency band in time.
- the service characteristics of different authorization systems such as the wireless microphone service
- the duration of the occupation of a certain frequency band is limited and bursty; in addition, such as the radar signal, the pulse signal transmitted by the service has periodic characteristics;
- the sensing system detects that the authorized system signal appears according to the existing manner, the spectrum is switched out to exit the frequency band, but the authorization system is quickly stopped (such as wireless microphone service), which will result in unnecessary
- the spectrum switching which in turn causes system loss; or the authorized system does not always occupy in the time domain (such as radar signals, cycle occupancy), it wastes spectrum resources to some extent, and does not improve the efficiency of spectrum resources.
- the CR system opportunistic use of the white space band is based on the premise that once the authorization system reappears, the CR system should promptly retreat to the frequency band.
- the service characteristics of different authorization systems such as the wireless microphone service
- the duration of the occupation of a certain frequency band is limited and bursty; in addition, such as radar signals, the pulse signals transmitted by the service are bursty and periodic.
- the sensing system detects the presence of the authorization system signal according to the existing method, the spectrum is switched out to exit the frequency band, and the authorization system can be quickly stopped (such as wireless microphone service), This will result in unnecessary spectrum switching, which in turn causes system loss; or the authorized system does not always occupy the time domain (such as radar signals), which wastes spectrum resources to some extent and does not improve the efficiency of spectrum resources.
- the embodiment of the present invention provides a transmission scheduling method and apparatus in a CR system, which is used to reduce system loss caused by frequent spectrum switching in a CR system, and improve utilization of spectrum resources.
- a transmission scheduling method in a CR system comprising:
- the CR system determines that its signal transmission at the current working frequency point causes interference to the signal transmission of the authorized system corresponding to the working frequency point;
- the CR system calculates the appearance rule of the blank spectrum according to the signal transmission condition of the authorization system during the set time period, and schedules the terminal to perform service data transmission on the blank spectrum according to the appearance rule of the blank spectrum and the service transmission rule of the terminal;
- the white space spectrum is a spectrum in which the CR system performs data transmission at the working frequency point without causing interference to the authorization system.
- a transmission scheduling device in a CR system comprising:
- the sensing detection unit is configured to determine that the signal transmission at the current working frequency point generates a disturbance to the signal transmission of the authorized system corresponding to the working frequency point;
- a regular statistical unit configured to calculate a rule of occurrence of a blank spectrum according to a signal transmission situation of the authorized system during a set time period
- a scheduling unit configured to: perform, according to an appearance rule of a blank spectrum and a service transmission rule of the terminal, a service data transmission on a blank spectrum; the blank spectrum is a data transmission of the working frequency, and the CR system does not perform the data transmission.
- the licensed system causes a disturbing spectrum.
- the CR system determines that the signal transmission at the current working frequency point causes a disturbance to the signal transmission of the authorization system corresponding to the working frequency point, and the signal according to the authorization system is within the set time period.
- the transmission situation statistics the occurrence rule of the blank spectrum. According to the appearance rule of the blank spectrum and the service transmission rule of the terminal, the scheduling terminal performs the service data transmission on the blank spectrum.
- the blank spectrum is the working frequency, and the CR system does not perform the data transmission. The system causes a disturbing spectrum.
- FIG. 1 is a schematic flowchart of a method provided by an embodiment of the present application.
- FIG. 2A is a schematic overall flow chart of Embodiment 1 of the present application.
- 2B is a schematic flowchart of determining whether to immediately retreat a frequency point in the first embodiment of the present application
- FIG. 3A is a schematic diagram of a VoIP service model according to Embodiment 2 of the present application.
- 3B is a schematic diagram of a time domain occupation rule of a radar system according to Embodiment 2 of the present application;
- 3C is a schematic diagram of a time domain occupation rule of a wireless microphone system according to Embodiment 3 of the present application.
- FIG. 4 is a schematic structural diagram of a device according to Embodiment 4 of the present application.
- FIG. 5 is a schematic structural diagram of a device according to Embodiment 5 of the present application. detailed description
- the embodiment of the present application provides a transmission scheduling method in a CR system.
- a transmission scheduling method in a CR system includes the following steps: Step 10: The CR system determines that the signal transmission at the current working frequency point generates a signal transmission of the authorization system corresponding to the working frequency point.
- the authorization system corresponding to the working frequency point refers to a system authorized to use the working frequency point;
- Step 11 During the set time period, the CR system calculates the occurrence rule of the blank spectrum according to the signal transmission condition of the authorized system, and schedules the terminal to perform service data transmission on the blank spectrum according to the appearance rule of the blank spectrum and the service transmission rule of the terminal;
- the blank spectrum is the spectrum of the working frequency of the CR system that does not interfere with the authorized system.
- step 10 can be as follows:
- the CR system detects that the signal of the authorization system corresponding to the current working frequency point appears at the working frequency point, and the strength of the signal is greater than the preset signal strength threshold, determining the signal transmission authorization of the CR system at the current working frequency point
- the signal transmission of the system generates the same frequency interference; in this case, the blank frequency refers to the spectrum of the working frequency that is not used by the authorized system to transmit data; or
- the CR system determines the signal transmission to the authorization system of the CR system at the current working frequency point when detecting that the signal of the authorization system corresponding to the current working frequency point appears at the adjacent frequency point and the strength of the signal is greater than the preset signal strength threshold.
- the signal transmission produces adjacent frequency interference.
- the blank frequency refers to the spectrum corresponding to the time point at which the authorized system does not transmit data at the adjacent frequency point.
- the above preset signal strength threshold may be a value greater than zero.
- the CR system can determine whether it is necessary to immediately exit the working frequency.
- the use of the point correspondingly, in step 11, after the CR system determines that the use of the working frequency point is not required to be immediately exited, the occurrence rule of the blank spectrum is counted according to the signal transmission condition of the authorized system within the set time period, according to The appearance rule of the blank spectrum and the service transmission scheduling terminal of the terminal perform the service data transmission on the blank spectrum. If the CR system determines that it is necessary to immediately exit the use of the working frequency point, the use of the working frequency point is immediately exited.
- the CR system determines whether the use of the working frequency point needs to be immediately exited, and the specific implementation may be as follows: If the current allowed service delay is lower than the preset delay threshold, the number of scheduling terminals is not less than a preset value, and / Or the CR system has an alternate frequency point, and the CR system determines that the use of the working frequency point needs to be immediately exited;
- the CR system determines that the use of the working frequency point does not need to be immediately exited.
- the preset delay threshold and the preset value may be values greater than zero.
- step 11 may include the following steps A-step E:
- Step A The CR system starts the waiting timer; here, the setting of the waiting timer is to ensure the performance of the CR system. If the monitored white space spectrum has not been able to meet the CR system requirements, and the CR system has not performed the retreat operation, it will cause the CR system to have no frequency point available. Therefore, it is necessary to set a wait timer, and the value of the timer duration of the wait timer is based on The service load of the CR system is determined. If the traffic load is large, the timing of the waiting timer is set to be short. If the traffic load is small, the waiting time of the timer is relatively large. Different CR systems can set the timing of the waiting timer according to the unified standard specification, or can be set independently for each CR system.
- Step B The CR system counts the appearance rule of the blank spectrum according to the signal transmission condition of the authorized system;
- Step C The CR system determines whether the appearance rule of the blank spectrum can satisfy the service data transmission requirement of the terminal, and if yes, go to step E, otherwise, Step D;
- Step D the CR system determines whether the waiting timer expires, and if so, exits the use of the working frequency point, otherwise, returns to step B;
- Step E The CR system schedules the terminal to perform service data transmission on the blank spectrum according to the appearance rule of the blank spectrum and the service transmission rule of the terminal.
- the CR system calculates the occurrence rule of the blank spectrum according to the signal transmission condition of the authorized system, and the specific implementation can be: 3 ⁇ 4 port:
- the CR system obtains the transmission characteristic information of the signal of the authorization system from the authorization system database, or obtains the transmission characteristic information of the signal of the authorized system through signal detection, and statistics the occurrence rule of the blank spectrum according to the obtained transmission characteristic information.
- the transmission characteristic information of the signal of the authorization system may include the waveform, width and repetition frequency of the pulse signal of the radar signal;
- the authorization system is a wireless microphone system, the transmission characteristic information of the signal of the authorization system may be Including the presence and absence of regular information of the microphone signal; obtaining the signal of the authorized system
- the spectrum occupancy rule of the authorized system for signal transmission can be obtained according to the transmission characteristic information, thereby obtaining the appearance rule of the blank spectrum.
- the CR system determines whether the appearance rule of the blank spectrum can meet the service data transmission requirement of the terminal, and the specific implementation can be as follows:
- the CR system determines whether the white space spectrum can carry the service data of the terminal according to the transmission period and transmission time requirements of the terminal service data and the appearance rule of the blank spectrum, and mainly determines whether the blank spectrum satisfies the appearance rule of the CR system service in the time domain/frequency domain. If it is determined to be YES, it is judged that the appearance rule of the blank spectrum can satisfy the service data transmission requirement of the terminal. Otherwise, it is judged that the appearance rule of the blank spectrum cannot meet the service data transmission requirement of the terminal. For example, suppose the transmission period of the terminal service data is 20 ms, and the data transmission time in each transmission period is 10 ms.
- the blank spectrum can carry the service data of the terminal. Otherwise, the blank spectrum cannot carry the service data of the terminal.
- the CR system schedules the terminal to perform service data transmission on the blank spectrum according to the appearance rule of the blank spectrum and the service transmission rule of the terminal, and the specific implementation may be as follows:
- the CR system sends scheduling signaling to the terminal according to the appearance rule of the blank spectrum and the service transmission rule of the terminal, and uses the semi-persistent scheduling (SPS) or the dynamic scheduling mode to enable the terminal to perform service data transmission on the blank spectrum according to the scheduling signaling.
- the scheduling signaling may carry the resource location information available for the service data transmission by the terminal, and the effective time information of the scheduling signaling, and the terminal may determine, according to the timing relationship between the scheduling signaling and the uplink data transmission in the prior art, the uplink service data is transmitted.
- the terminal determines that the time point conflicts with the time point at which the authorized system performs data transmission at the working frequency or the adjacent frequency point, the terminal moves the time point of transmitting the uplink service data, and the specific time length of the backward movement may be
- the CR system is carried in the scheduling signaling, and may also be pre-agreed.
- the CR system may also send the transmission characteristic information of the signal of the authorization system to the terminal in advance, so that the terminal determines, according to the transmission characteristic information, the time point at which the uplink service data is transmitted and the data transmission of the authorization system at the working frequency or the adjacent frequency point. Whether the time points conflict.
- the CR system detects whether the signal of the authorization system appears on the non-blank spectrum of the working frequency point, and if not, clears the waiting timer, and resumes transmission scheduling of the service data of the terminal in the CR system.
- the CR system can notify the terminal in the CR system: during the set time period. If the scheduling signaling is received, the service data transmission is performed, otherwise no service data transmission is performed. The terminal performs data transmission according to the received notification.
- VoIP voice over IP, IP-based voice call
- browsing web pages and other background services have gradually become the mainstream services provided by mobile communications.
- the business characteristics of VoIP services are Periodically, service transmission and no service transmission occur periodically, while background services allow for larger service delays. Therefore, in the white space spectrum, the above types of services can be scheduled.
- the authorization system in this application may specifically be: a radar system or a wireless microphone system.
- Embodiment 1 is a diagrammatic representation of Embodiment 1:
- a method for intermittent scheduling in a CR system is provided.
- the CR system detects that the authorization system is present, the CR system does not immediately perform frequency switching, but waits according to the characteristics of the authorized system service and the state of the CR system itself. If the system does not switch, the user service of the system is intermittently scheduled during the waiting period, thereby improving the efficiency of the frequency usage and reducing the system loss caused by unnecessary spectrum switching.
- FIG. 2A The specific implementation process of this embodiment is shown in FIG. 2A:
- Step SI After the CR system determines that its signal transmission at the current working frequency has caused interference to the signal transmission of the authorized system corresponding to the working frequency point, the CR system suspends the service data transmission of the system;
- Step S2 The CR system determines whether it is necessary to immediately retreat the working frequency point, if yes, go to step S8, otherwise, go to step S3;
- Step S3 starting a wait timer
- the CR system continuously observes the usage of the available frequency point, and counts the occurrence rule of the "slot available spectrum" at the available frequency point, that is, the blank spectrum;
- Step S4 The CR system calculates the appearance rule of the blank spectrum according to the signal transmission condition of the authorization system.
- Step S5 The CR system determines whether the appearance rule of the blank spectrum can meet the service data transmission requirement of the terminal, and if yes, proceeds to step S6, otherwise, to Step S7;
- Step S6 The CR system intermittently schedules the terminal to perform service data transmission on the blank spectrum according to the appearance rule of the blank spectrum and the service transmission rule of the terminal, and the process ends; wherein the intermittent scheduling refers to a rule according to the appearance of the blank spectrum, and The user is scheduled by the service transmission rules of different users.
- Step S7 The CR system determines whether the waiting timer has timed out, and if yes, proceeds to step S8, otherwise, returns to the step
- Step S8 The CR system exits the use of the current working frequency, and the process ends.
- Step SI The CR system determines its own signal transmission at the current working frequency point and transmits the signal to the authorized system corresponding to the working frequency point. Generate interference;
- Step S21 The CR system determines whether the number of scheduling terminals whose current allowed service delay is lower than the preset delay threshold Xms is less than N, and/or whether the CR system has no alternate frequency point, and if yes, proceeds to step S22, otherwise, to Step S23; Step S22: determining that the use of the working frequency point is not required to be immediately exited, starting the waiting timer, setting the timing duration to 7 ⁇ , and notifying all terminals in the system, within 7 ⁇ time, unless a scheduling instruction is received, otherwise All service transmissions are suspended during the time;
- Step S23 Immediately exit the use of the working frequency point.
- Embodiment 2 is a diagrammatic representation of Embodiment 1:
- the authorization system is a radar system
- the pulse width of the radar system is 100 microseconds
- the repetition period is 20 ms
- the occupied channel is fl
- the specific center frequency is 2700 MHz
- the bandwidth is 6 MHz
- the number of scheduled users is 3, and the services to be transmitted are all VoIP-type services.
- the service transmission model is shown in Figure 3A.
- a service data packet is generated every 20ms, and the size is 35 ⁇ 49Bytes.
- a service data packet is generated every 160ms, and its size ranges from 10 to 24 Bytes.
- the transmission delay preset threshold is X for 10ms and N is 0.
- the first step The CR system detects that the radar user signal appears at the same frequency as the CR system. If the CR system generates interference to the radar system, the CR system stops all service transmissions and determines whether it is necessary to immediately retreat the use. Frequency point: The three services currently scheduled are VoIP-type services, and the allowed delays are all greater than 10ms. It is judged that the frequency of use is not required to be immediately retired, and the waiting timer is started. The timing is set to 7 ⁇ , and the notification is also notified.
- Step 2 In the 7 ⁇ time range, the CR system continuously observes the frequency of use Pointing on the waveform, width and repetition frequency of the pulse signal of the radar signal, looking for the "slot available spectrum", that is, the appearance rule of the blank spectrum; in this embodiment, the law is as shown in FIG. 3B, and the green area is the time occupied by the authorization system. Area, white area is the available time area; Step 3: According to the result of the second step, judge the intermittent spectrum, ie white space Whether the time domain/frequency domain satisfies the appearance rule of CR system service: Compared with FIG. 3A and FIG.
- the radar system can reserve enough space in the time domain to transmit VoIP service packets every 20 ms; meanwhile, when the frequency band is unavailable Segment, CR needs to detect whether the signal of the radar system appears, if it does not appear again, resume normal service scheduling, and clear the waiting timer;
- Embodiment 3 is a diagrammatic representation of Embodiment 3
- the authorization system is a wireless microphone system
- the pulse width of the microphone system is 10 ms
- the period is Is
- the occupied channel is fl
- the specific center frequency is 2700 MHz
- the bandwidth is 6 MHz
- the number of services to be transmitted is VoIP-type services.
- the service transmission model is shown in Figure 3A.
- a service data packet is generated every 20ms, and the size is 35 ⁇ 49Bytes.
- a service data packet is generated every 160ms, and the size of the packet is changed. 10 ⁇ 24Bytes.
- the transmission delay preset threshold is X for 10 ms and N is 0.
- Step 1 The CR system detects that the wireless microphone user signal appears at the same frequency as the CR system. If the CR system generates interference to the wireless microphone system, the CR system stops all service transmissions and determines whether it needs to be immediately retired.
- the frequency of use The three services currently scheduled are all VoIP-type services, and the allowed delays are all greater than 10 ms. It is determined that the frequency of use is not required to be immediately retired, and the waiting timer is started, and the timing duration is set to 7 ⁇ .
- Step 2 Continuous observation of CR system in 7 ⁇ time range
- the width and the repetition frequency of the pulse signal of the wireless microphone signal at the frequency of use, the appearance of the "slot available spectrum", that is, the appearance of the white space spectrum is sought; in this embodiment, the law is as shown in FIG. 3C, and the green area is The time zone occupied by the authorization system, the white zone is the available time zone i or;
- Step 3 According to the results of the second step, judge whether the intermittent spectrum, that is, the blank frequency, satisfies the appearance of the CR system service in the time domain/frequency domain: Compare Figure 3A and Figure 3C, the wireless microphone system per Is A sufficient space can be reserved in the time domain to transmit the VoIP service packet. Meanwhile, in the time period when the frequency band is unavailable, the CR needs to detect whether the signal of the wireless microphone system appears, and if it no longer appears, resume normal service scheduling, and clear the traffic. Waiting for the timer.
- a transmission scheduling apparatus in a CR system includes: an authorization system information database 45, configured to provide an authorization system frequency point usage to a regular statistical unit that appears in the authorization system, and Authorize the system's signal to appear regular, authorize the system's geographic location and other information, and update the database according to the information summarized by the statistical unit;
- Perceptual detection unit 40 the CR system uses a certain perceptual detection algorithm, the perceptual detection authorization system frequency point usage information and signal appearance rules, etc., for providing the above information to the regular statistical unit appearing in the authorization system;
- the regular statistical unit 41 is configured to calculate the usage rule of the frequency band according to the information related to the authorization system, and provide the foregoing information to the spectrum backoff decision making unit and the scheduling unit;
- the scheduling unit 42 is configured to complete statistics and scheduling of user services of the CR system, and provide service information of the CR system to the spectrum backoff decision unit, such as the number of scheduled users, the type of service of the scheduled users, and the result and statistics according to the spectrum backoff decision
- the regular information provided by the unit is reasonably scheduled for the users of the system;
- the spectrum backoff decision unit 43 according to the CR system service information provided by the scheduling unit and the regular information provided by the statistical unit, according to the corresponding criteria, whether to immediately perform spectrum rebate;
- the spectrum backoff management unit 44 performs a spectrum backoff related operation according to the result of the spectrum backoff decision unit decision.
- the sensing detection unit 40 is configured to determine that the signal transmission of the current working frequency point generates a disturbance to the signal transmission of the authorization system corresponding to the working frequency point;
- a regular statistical unit 41 configured to calculate a rule of occurrence of a blank spectrum according to a signal transmission condition of the authorized system during a set time period;
- the scheduling unit 42 is configured to: according to the appearance rule of the white space spectrum and the service transmission rule of the terminal, the terminal performs the service data transmission on the blank spectrum; the blank spectrum is the working frequency, and the CR system does not transmit the data.
- the device further includes:
- the spectrum backoff decision unit 43 is configured to determine whether it is necessary to immediately withdraw the use of the working frequency point after determining that the signal transmission at the current working frequency point causes interference to the signal transmission of the authorization system corresponding to the working frequency point;
- the scheduling unit 42 is configured to:
- the occurrence rule of the blank spectrum is counted according to the signal transmission condition of the authorized system during the set time period, according to the appearance rule of the blank spectrum and the service transmission of the terminal.
- the regular scheduling terminal performs service data transmission on the blank spectrum.
- the spectrum backoff decision unit 43 is configured to:
- the number of scheduling terminals that currently allow the service delay to be lower than the preset delay threshold is not less than a preset value, and/or the CR system has an alternate frequency point, it is determined that the use of the working frequency point needs to be immediately exited. ;
- the number of scheduling terminals that currently allow the service delay to be lower than the preset delay threshold is less than a preset value, and/or the CR system has no alternate frequency point, it is determined that the use of the working frequency point does not need to be immediately exited. .
- the sensing detection unit 40 is configured to:
- the device further includes: a spectrum backoff management unit 44, configured to perform an operation of exiting the use of the working frequency point;
- the regular statistics unit 41 is configured to perform the following steps:
- step D counting the occurrence rule of the blank spectrum according to the signal transmission condition of the authorization system; C, determining whether the appearance rule of the blank spectrum can meet the service data transmission requirement of the terminal, and if so, triggering the scheduling unit 42, otherwise, performing step D;
- step D Determine whether the waiting timer expires. If yes, trigger the spectrum backoff management unit 44. Otherwise, return to step B.
- rule statistics unit 41 is configured to: calculate the appearance rule of the blank spectrum according to the signal transmission situation of the authorization system according to the following method:
- rule statistics unit 41 is configured to: determine whether the appearance rule of the white space spectrum can meet the service data transmission requirement of the terminal according to the following method:
- the scheduling unit 42 is configured to: according to the appearance rule of the white space spectrum and the service transmission rule of the terminal, schedule the terminal to perform service data transmission on the blank spectrum according to the following method:
- the scheduling signaling is sent to the terminal by using the semi-persistent scheduling SPS or the dynamic scheduling mode, so that the terminal performs the service data transmission on the blank spectrum according to the scheduling signaling.
- the sensing detection unit 40 is further configured to:
- the sensing detection unit 40 is further configured to:
- the authorization system is: a radar system or a wireless microphone system.
- a transmission scheduling apparatus in a CR system includes: a processor 50, configured to determine a signal transmission system at a current working frequency point, and an authorization system corresponding to the working frequency point.
- the signal transmission generates a disturbance, and the occurrence rule of the blank spectrum is counted according to the signal transmission condition of the authorized system during the set time period, and the terminal is scheduled to perform the service on the blank spectrum according to the appearance rule of the blank spectrum and the service transmission rule of the terminal.
- Data transmission; the blank spectrum is the operating frequency of the CR system for data transmission does not belong to the authorization system a spectrum that causes disturbances;
- the transceiver 51 is configured to receive and transmit data under the control of the processor 50.
- the processor 50 is further configured to:
- the processor 50 is further configured to:
- the number of scheduling terminals that currently allow the service delay to be lower than the preset delay threshold is not less than a preset value, and/or the CR system has an alternate frequency point, it is determined that the use of the working frequency point needs to be immediately exited. ;
- the number of scheduling terminals that currently allow the service delay to be lower than the preset delay threshold is less than a preset value, and/or the CR system has no alternate frequency point, it is determined that the use of the working frequency point does not need to be immediately exited. .
- the processor 50 is further configured to:
- the processor 50 is further configured to: perform an operation of exiting the use of the working frequency point; perform the following steps:
- step C determining whether the appearance rule of the blank spectrum can meet the service data transmission requirement of the terminal, and if so, triggering the scheduling unit 42, otherwise, performing step D;
- step D Determine whether the waiting timer expires. If yes, trigger the spectrum backoff management unit 44. Otherwise, return to step B.
- the processor 50 is further configured to: calculate an appearance rule of the blank spectrum according to a signal transmission situation of the authorization system according to the following method: acquire transmission characteristic information of a signal of the authorization system, or obtain the transmission characteristic information from the sensing detection unit 40 Obtaining transmission characteristic information of the signal of the authorization system obtained by the signal detection, and counting occurrence rules of the blank spectrum according to the obtained transmission characteristic information.
- the processor 50 is further configured to: determine whether the appearance rule of the white space spectrum can meet the service data transmission requirement of the terminal according to the following method:
- the processor 50 is further configured to: according to the appearance rule of the blank spectrum and the service transmission rule of the terminal, schedule the terminal to perform service data transmission on the blank spectrum according to the following method:
- the scheduling signaling is sent to the terminal by using the semi-persistent scheduling SPS or the dynamic scheduling mode, so that the terminal performs the service data transmission on the blank spectrum according to the scheduling signaling.
- the processor 50 is further configured to:
- the processor 50 is further configured to:
- the authorization system is: a radar system or a wireless microphone system.
- the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 50 and various circuits of memory represented by memory 52.
- the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
- the bus interface provides an interface.
- the transceiver 51 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on the transport interface.
- the processor 50 is responsible for managing the bus architecture and general processing, and the memory 52 can store data used by the processor 50 in performing operations.
- the processor 50 is responsible for managing the bus architecture and general processing, and the memory 52 can store data used by the processor 50 in performing operations.
- the beneficial effects of the application include:
- the CR system determines that the signal transmission at the current working frequency point causes a disturbance to the signal transmission of the authorization system corresponding to the working frequency point, and the signal according to the authorization system is within the set time period.
- the transmission situation statistics the occurrence rule of the blank spectrum, according to the appearance rule of the blank spectrum and the service transmission rule of the terminal, the terminal performs the service data transmission on the blank spectrum, and the blank spectrum is the data transmission point of the CR system.
- the CR system determines that the signal transmission at the current working frequency has caused interference to the signal transmission of the authorized system corresponding to the working frequency point, and does not immediately exit the use of the working frequency point, but at a certain time.
- the white space spectrum at the working frequency is reasonably utilized, and the scheduling terminal performs service data transmission on the white space spectrum, thereby reducing system loss caused by frequent spectrum switching in the CR system, and improving the utilization of spectrum resources by utilizing the white space spectrum.
- 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 apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- 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.
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
本申请实施例公开了一种认知无线电CR系统中的传输调度方法和装置,涉及无线通信领域,用于降低CR系统由于频繁进行频谱切换造成的系统损耗,以及提高频谱资源的利用率。本申请中,CR系统确定自身在当前工作频点的信号传输对该工作频点对应的授权系统的信号传输产生干扰后,在设定时间段内,根据授权系统的信号传输情况统计空白频谱的出现规律,根据空白频谱的出现规律和终端的业务传输规律调度终端在空白频谱上进行业务数据传输,空白频谱为该工作频点的、CR系统进行数据传输不会对授权系统造成干扰的频谱。本方案降低了CR系统由于频繁进行频谱切换造成的系统损耗,同时通过利用空白频谱也提高了频谱资源的利用率。
Description
认知无线电系统中的传输调度方法和装置 本申请要求在 2013年 06月 24 日提交中国专利局、 申请号为 201310253638.1、 申请 名称为"认知无线电系统中的传输调度方法和装置 "的中国专利申请的优先权, 其全部内容 通过引用结合在本申请中。 技术领域
本申请涉及无线通信领域, 尤其涉及一种认知无线电系统中的传输调度方法和装置。 背景技术
无线电通信频语是一种宝贵的自然资源, 随着无线通信技术的飞快发展, 频谱资源贫 乏的问题日益严重, 为了緩解频谱资源紧张的现状, 相关的部门和机构对无线通信频谱进 行了监测和研究, 发现某些频段(如电视频段)在大多数时间内并未使用或者在大多数地 域内并未使用, 而某些频段则出现了多系统多用户同时竟争的情况, 即某些业务承载量很 大的系统没有足够的频谱资源而另外一些业务承载量不大的系统却占用了太多的资源。 CR ( Cognitive Radio, 认知无线电) 的概念正是在这种背景下产生的, 其基本思想是: 在不 对授权系统造成千扰的前提下, 感知系统可以通过监测当前无线环境的变化来动态的选择 空白频段进行通信。
当感知系统机会性使用授权系统的空白频段时, 保护授权系统不受千扰是一个基本前 提, 这种保护主要包含以下两个方面:
第一, 感知系统准确判断出哪些授权系统的频段是可用的空白频段(在这些频段上引 入感知系统不会影响授权系统的正常工作);
第二, 当占用频段不再可用时, 感知系统需要及时的将这些频段退让给授权系统。 当前的研究中, 确定空白频谱的方法主要有以下两种:
第一, 感知方法;
感知方法中, 感知系统的基站通过感知算法来检测某个频段上授权系统信号的强度, 当该信号的强度大于某个门限值时, 即认为该基站与使用这个频段的授权系统的距离过 近, 在此频段上引入感知系统会对授权系统的正常工作产生影响, 因此该频段不可用; 第二, 数据库方法;
在当前的感知无线电标准研究中, 数据库方法获得了较多认可, 感知系统从本地数据 库中直接读取针对某个具体位置、 哪些频段可以使用的信息。
根据相关调研, 广播电视频段的使用效率不高, 同时考虑到模拟电视向数字电视的全 面转型, 大量的广播电视频段会空余出来; 根据相关测试结果可以看出, 我国的广播电视 频段也存在较大的可再次开发利用的空间。 广播电视频段上存在着如下几种业务类型: 固 定电视业务, 移动电视业务, 无线麦克风业务等。
此外, ITU ( International Telecommunication Union, 国际通信联盟)将 2.3GHz-2.4GHz 分配给 LTE ( Long Term Evolution, 长期演进) 系统使用, 但是使用该频段规划 LTE系统 却遇到了一些困难, 如当前在欧洲国家, 这些频段有的被时频(video ) 占用了, 有的被军 方(如军方的雷达系统) 占用了, 政府层面 (舞规划, 因此 LTE系统如何使用该频段也是 一个问题。 一些组织提出通过感知无线电的方式, 可以实现过渡期对该频段的使用。
根据目前的研究, CR 系统机会式的使用空白频段的前提是, 一旦授权系统又重新出 现, CR 系统要及时退让该频段。 然而考虑到不同授权系统的业务特点, 如无线麦克风业 务, 该业务占用某个频段的持续时间有限, 且具备突发性; 另外, 如雷达信号, 其发射的 脉冲信号具备周期性的特点; 针对上述系统, 如果按照现有的方式, 感知系统检测到授权 系统信号出现, 就通过频谱切换的方式退出该频段, 但授权系统很快又停止了使用 (如无 线麦克风业务), 将会导致没有必要的频谱切换, 进而造成系统损耗; 或者授权系统在时 域上并未一直占用 (如雷达信号, 周期占用), 则在一定程度上浪费了频谱资源, 并未提 高频谱资源的使用效率。
在 CR系统的研究过程中, 引入了备用频点的概念, 即一旦当前工作频点不可用时, 可以退让到备用频点上, 实际应用中, 可能存在没有备用频点的场景, 此时如果 CR系统 退让原来的频段, 该系统将无频点可用。
综上, 根据目前的研究, CR 系统机会式的使用空白频段的前提是, 一旦授权系统又 重新出现, CR 系统要及时退让该频段。 然而考虑到不同授权系统的业务特点, 如无线麦 克风业务, 该业务占用某个频段的持续时间有限, 且具备突发性; 另外, 如雷达信号, 其 发射的脉冲信号具备突发性、 周期性的特点; 针对上述系统, 如果按照现有的方式, 感知 系统检测到授权系统信号出现, 就通过频谱切换的方式退出该频段, 可授权系统很快又停 止了使用 (如无线麦克风业务), 将会导致没有必要的频谱切换, 进而造成系统损耗; 或 者授权系统在时域上并未一直占用 (如雷达信号), 则在一定程度上浪费了频谱资源, 并 未提高频谱资源的使用效率。
在 CR系统的研究过程中, 引入了备用频点的概念, 即一旦当前工作频点不可用时, 可以退让到备用频点上, 实际应用中, 可能存在没有备用频点的场景, 此时如果 CR系统 退让原来的频段, 该系统将无频点可用, 则将中断该 CR系统覆盖范围内所有用户的业务
通信, 显然会造成用户体验大幅度下降, CR设备利用率降低。 发明内容
本申请实施例提供一种 CR系统中的传输调度方法和装置, 用于降低 CR系统由于频 繁进行频谱切换造成的系统损耗, 以及提高频谱资源的利用率。
一种 CR系统中的传输调度方法, 该方法包括:
CR 系统确定自身在当前工作频点的信号传输对该工作频点对应的授权系统的信号传 输产生千扰;
所述 CR系统在设定时间段内, 根据所述授权系统的信号传输情况统计空白频谱的出 现规律 , 根据空白频谱的出现规律和终端的业务传输规律调度终端在空白频谱上进行业务 数据传输; 所述空白频谱为所述工作频点的、 CR 系统进行数据传输不会对所述授权系统 造成千扰的频谱。
一种 CR系统中的传输调度装置, 该装置包括:
感知检测单元, 用于确定自身在当前工作频点的信号传输对该工作频点对应的授权系 统的信号传输产生千扰;
规律统计单元, 用于在设定时间段内, 根据所述授权系统的信号传输情况统计空白频 谱的出现规律;
调度单元, 用于根据空白频谱的出现规律和终端的业务传输规律调度终端在空白频谱 上进行业务数据传输; 所述空白频谱为所述工作频点的、 CR 系统进行数据传输不会对所 述授权系统造成千扰的频谱。
本申请实施例提供的方案中, CR 系统确定自身在当前工作频点的信号传输对该工作 频点对应的授权系统的信号传输产生千扰后, 在设定时间段内, 根据授权系统的信号传输 情况统计空白频谱的出现规律, 根据空白频谱的出现规律和终端的业务传输规律调度终端 在空白频谱上进行业务数据传输, 空白频谱为该工作频点的、 CR 系统进行数据传输不会 对授权系统造成千扰的频谱。 可见, 本方案中 CR系统确定自身在当前工作频点的信号传 输对该工作频点对应的授权系统的信号传输产生千扰后, 并不立即退出对工作频点的使 用, 而是在一定时间内合理利用工作频点上的空白频谱, 调度终端在空白频谱上进行业务 数据传输, 从而降低了 CR系统由于频繁进行频谱切换造成的系统损耗, 同时通过利用空 白频谱也提高了频谱资源的利用率。 附图说明
图 1为本申请实施例提供的方法流程示意图;
图 2A为本申请实施例一的整体流程示意图;
图 2B为本申请实施例一中判断是否立即退让频点的流程示意图;
图 3A为本申请实施例二的 VoIP类业务模型示意图;
图 3B为本申请实施例二中雷达系统时域占用规律示意图;
图 3C为本申请实施例三中的无线麦克风系统时域占用规律示意图;
图 4为本申请实施例四提供的装置结构示意图;
图 5为本申请实施例五提供的装置结构示意图。 具体实施方式
为了降低 CR系统由于频繁进行频谱切换造成的系统损耗及提高频谱资源的利用率, 本申请实施例提供一种 CR系统中的传输调度方法。
参见图 1 , 本申请实施例提供的 CR系统中的传输调度方法, 包括以下步骤: 步骤 10: CR系统确定自身在当前工作频点的信号传输对该工作频点对应的授权系统 的信号传输产生千扰; 这里, 该工作频点对应的授权系统是指被授权使用该工作频点的系 统;
步骤 11 : CR系统在设定时间段内, 根据授权系统的信号传输情况统计空白频谱的出 现规律 , 根据空白频谱的出现规律和终端的业务传输规律调度终端在空白频谱上进行业务 数据传输; 该空白频谱为该工作频点的、 CR 系统进行数据传输不会对授权系统造成千扰 的频谱。
具体的, 步骤 10的具体实现可以如下:
CR 系统在检测到当前工作频点对应的授权系统的信号出现在该工作频点上、 并且该 信号的强度大于预设信号强度门限时, 确定该 CR系统在当前工作频点的信号传输对授权 系统的信号传输产生同频千扰; 该情况下, 空白频语是指该工作频点上的、 未被授权系统 用来传输数据的频谱; 或者,
CR 系统在检测到当前工作频点对应的授权系统的信号出现在邻频点上、 并且该信号 的强度大于预设信号强度门限时, 确定该 CR系统在当前工作频点的信号传输对授权系统 的信号传输产生邻频千扰。 该情况下, 空白频语是指该工作频点上的、 授权系统在邻频点 上未传输数据的时间点对应的频谱。
上述预设信号强度门限可以为大于 0的数值。
较佳的, 在步骤 10和步骤 11之间, CR系统可以确定是否需要立即退出对该工作频
点的使用; 相应的, 步骤 11中, CR系统在确定不需要立即退出对该工作频点的使用后, 在设定时间段内, 根据授权系统的信号传输情况统计空白频谱的出现规律, 根据空白频谱 的出现规律和终端的业务传输规律调度终端在空白频谱上进行业务数据传输。 若 CR系统 确定需要立即退出对该工作频点的使用, 则立即退出对该工作频点的使用。
具体的, CR系统确定是否需要立即退出对该工作频点的使用, 具体实现可以如下: 若当前允许业务时延低于预设时延门限的调度终端的个数不小于预设数值 , 和 /或 CR 系统有备用频点, 则 CR系统确定需要立即退出对该工作频点的使用;
若当前允许业务时延低于预设时延门限的调度终端的个数小于预设数值 , 和 /或 CR系 统无备用频点, 则 CR系统确定不需要立即退出对该工作频点的使用。
上述预设时延门限和预设数值可以是大于 0的数值。
具体的, 步骤 11的具体实现可以包括如下步骤 A-步骤 E:
步骤 A、 CR系统启动等待定时器; 这里, 等待定时器的设置, 是为了保证 CR系统的 性能。 若监测的空白频谱一直不能满足 CR系统的需求, 且 CR系统一直不做退让操作 , 则将导致 CR系统一直无频点可用, 因此需要设置等待定时器, 该等待定时器的定时时长 的数值根据 CR系统的业务负荷进行确定, 若业务负荷较大, 则等待定时器的定时时长设 置较短, 若业务负荷较小则等待定时器的定时时长相对较大。 不同的 CR系统该等待定时 器的定时时长的设置可以按照统一的标准规范, 也可以各个 CR系统独立设置。
步骤 B、 CR系统根据授权系统的信号传输情况统计空白频谱的出现规律; 步骤 C、 CR 系统判断空白频谱的出现规律是否能够满足终端的业务数据传输需求, 若是, 则到步骤 E, 否则, 到步骤 D;
步骤 D、 CR 系统判断等待定时器是否超时, 若是, 则退出对该工作频点的使用, 否 则, 返回步骤 B;
步骤 E、 CR系统根据空白频谱的出现规律和终端的业务传输规律调度终端在空白频谱 上进行业务数据传输。
具体的, CR 系统根据授权系统的信号传输情况统计空白频谱的出现规律, 具体实现 可以: ¾口下:
CR 系统从授权系统数据库获取授权系统的信号的传输特性信息, 或通过信号检测得 到授权系统的信号的传输特性信息, 根据获得的传输特性信息统计空白频谱的出现规律。 比如, 如果授权系统是雷达系统, 授权系统的信号的传输特性信息可以包括雷达信号的脉 冲信号的波形, 宽度和重复频率等; 如果授权系统是无线麦克风系统, 授权系统的信号的 传输特性信息可以包括麦克风信号的出现与停止出现的规律信息; 在获得授权系统的信号
的传输特性信息后, 可以根据该传输特性信息得到授权系统进行信号传输时的频谱占用规 律, 进而得到空白频谱的出现规律。
具体的, CR 系统判断空白频谱的出现规律是否能够满足终端的业务数据传输需求, 具体实现可以如下:
CR 系统根据终端业务数据的传输周期和传输时间要求、 以及空白频谱的出现规律确 定空白频谱能否承载终端的业务数据, 主要判断空白频谱在时域 /频域上是否满足 CR系统 业务的出现规律 , 若确定为是, 则判断空白频谱的出现规律能够满足终端的业务数据传输 需求, 否则, 判断空白频谱的出现规律不能够满足终端的业务数据传输需求。 比如, 假设 终端业务数据的传输周期为 20ms, 每个传输周期内的数据传输时间为 10ms, 若在工作频 点上每 20ms能够出现至少一个空白频谱、 并且空白频谱的持续时间不小于 10ms, 则空白 频谱能够承载终端的业务数据 , 否则, 空白频谱不能够承载终端的业务数据。
具体的, CR 系统根据空白频谱的出现规律和终端的业务传输规律调度终端在空白频 谱上进行业务数据传输, 具体实现可以如下:
CR系统根据空白频谱的出现规律和终端的业务传输规律 , 釆用半持续调度( SPS )或 动态调度方式向终端发送调度信令, 以使终端根据该调度信令在空白频谱上进行业务数据 传输。 在调度信令中可以携带终端进行业务数据传输可用的资源位置信息、 该调度信令的 有效时间信息, 终端可以根据现有技术中调度信令与上行数据传输的时序关系确定传输上 行业务数据的时间点, 若终端确定该时间点与授权系统在该工作频点或邻频点进行数据传 输的时间点冲突, 则终端将传输上行业务数据的时间点后移, 具体后移的时间长度可以由 CR系统在调度信令中携带, 也可以预先约定。 CR系统还可以预先将授权系统的信号的传 输特性信息发送给终端, 以使终端根据该传输特性信息确定传输上行业务数据的时间点与 授权系统在该工作频点或邻频点进行数据传输的时间点是否冲突。
较佳的, CR 系统在该工作频点的非空白频谱上, 检测授权系统的信号是否出现, 若 未出现, 则清空等待定时器, 并恢复对 CR系统内的终端的业务数据的传输调度。
较佳的, 在 CR系统确定自身在当前工作频点的信号传输对该工作频点对应的授权系 统的信号传输产生千扰之后, CR系统可以通知该 CR系统内的终端:在设定时间段内若收 到调度信令则进行业务数据传输, 否则不进行任何业务数据传输。 终端根据接收到的通知 进行数据传输。
随着移动互联网的普及, 类似于 VoIP ( Voice over IP, 基于 IP的语音呼叫)类业务、 浏览网页等背景类业务, 逐渐成为了目前移动通信提供的主流业务; VoIP类业务的业务特 点是具有周期性,业务发送和无业务发送周期性出现, 而背景类业务允许较大的业务时延,
因此, 在空白频谱里, 可以调度上述类型的业务。
本申请中的授权系统具体可以是: 雷达系统或无线麦克风系统。
下面结合具体实施例对本申请进行说明:
实施例一:
本实施例,提供了一种 CR系统中间歇式调度方法, CR系统在察觉到授权系统出现时, 不立刻进行频语切换, 而是根据授权系统业务的特点及 CR系统自身的状态, 适时等待, 暂不切换, 在等待期间间歇性调度本系统用户业务, 从而可以提高频语使用效率, 减少不 必要的频谱切换带来的系统损耗。 同时对于不具备备用频点 (无退路) 的 CR系统, 仍可 以使用 "缝隙式的可用频谱,,, 维持本系统部分业务, 提高 CR设备利用效率。
本实施例的具体实现流程如图 2A所示:
步骤 SI : CR系统确定自身在当前工作频点的信号传输对该工作频点对应的授权系统 的信号传输产生千扰后, CR系统暂停本系统的业务数据传输;
步骤 S2: CR系统判断是否需要立即退让该工作频点, 若是, 则到步骤 S8 , 否则, 到 步骤 S3 ;
步骤 S3 : 启动等待定时器;
后续步骤中在等待定时器超时前, CR 系统持续观测该可用频点的使用情况, 并统计 该可用频点上 "缝隙式可用频谱" 即空白频谱的出现规律;
步骤 S4: CR系统根据授权系统的信号传输情况统计空白频谱的出现规律; 步骤 S5: CR系统判断空白频谱的出现规律是否能够满足终端的业务数据传输需求, 若是, 则到步骤 S6, 否则, 到步骤 S7;
步骤 S6: CR系统根据空白频谱的出现规律和终端的业务传输规律间歇式调度终端在 空白频谱上进行业务数据传输, 本流程结束; 其中, 间歇式的调度是指根据空白频谱出现 的规律, 以及不同用户的业务传输规律等对用户进行调度。
步骤 S7: CR 系统判断等待定时器是否超时, 若是, 则到步骤 S8 , 否则, 返回步骤
S4;
步骤 S8: CR系统退出对当前工作频点的使用, 本流程结束。
步骤 S2中 CR系统判断是否需要立即退让该工作频点的具体方法如图 2B所示: 步骤 SI : CR系统确定自身在当前工作频点的信号传输对该工作频点对应的授权系统 的信号传输产生千扰;
步骤 S21 : CR系统判断当前允许业务时延低于预设时延门限 Xms的调度终端的个数 是否小于 N, 和 /或 CR系统是否无备用频点, 若是, 则到步骤 S22, 否则, 到步骤 S23 ;
步骤 S22: 判断不需立刻退出对该工作频点的使用, 启动等待定时器, 定时时长设定 为7^ , 同时通知系统内所有终端, 在7^时间内, 除非收到调度指令, 否则在 时间内 暂停所有业务传输;
步骤 S23: 立即退出对该工作频点的使用。
实施例二:
在本实施例中, 假设授权系统为雷达系统, 该雷达系统的脉冲宽度为 100微秒, 重复 周期为 20ms, 占用的频道为 fl , 具体的为中心频点为 2700MHz, 带宽为 6MHz; CR系统 调度用户个数为 3 , 需要传输的业务均为 VoIP类的业务, 其业务传输模型如图 3A所示, 在激活 (即 talkspurt )期间内, 每 20ms产生一个业务数据分组, 大小为 35~49Bytes, 静 默(即 silent period )期间内, 每 160ms 产生一个业务数据分组, 其大小的变化范围是 10~24Bytes。 假设传输时延预设门限为 X为 10ms, N为 0。
基于上述假设, 本方案的实现流程如下:
第一步: CR系统检测到雷达用户信号同频出现在 CR系统的使用频点上, CR系统对 雷达系统产生千扰, 则 CR系统停止所有业务传输, 并判断此时是否需要立即退让该使用 频点: 当前调度的三个业务均为 VoIP类业务, 其允许时延均大于 10ms, 则判断为不需立 刻退让该使用频点, 启动等待定时器, 定时时长设定为7^ , 同时通知系统内所有终端, 在 时间内, 除非收到调度指令, 否则在 τ 时间内暂停所有业务传输, 并进入第二步; 第二步: 在7^时间范围内, CR系统持续观测在该使用频点上雷达信号的脉冲信号的 波形, 宽度和重复频率, 寻找 "缝隙式可用频谱" 即空白频谱的出现规律; 在本实施例中, 规律如图 3B所示, 绿色区域为授权系统占用的时间区域, 白色的区域为可用的时间区域; 第三步: 根据第二步统计的结果, 判断间歇性出现的频谱即空白频语在时域 /频域是否 满足 CR系统业务的出现规律: 对比图 3A及图 3B, 雷达系统每 20ms内可以在时域预留 出足够的空间传输 VoIP业务包; 同时, 在频段不可用的时间段, CR需检测雷达系统的信 号是否出现, 如果不再出现, 则恢复正常的业务调度, 并清空等待定时器;
实施例三:
在本实施例中, 假设授权系统为无线麦克风系统, 该麦克风系统的脉冲宽度为 10ms, 周期为 Is, 占用的频道为 fl , 具体的为中心频点为 2700MHz, 带宽为 6MHz; CR系统调 度用户个数为 3 , 需要传递的业务均为 VoIP类的业务, 其业务传输模型如图 3A所示, 在 激活 (即 talkspurt )期间内, 每 20ms产生一个业务数据分组, 大小为 35~49Bytes, 在静 默(即 silent period )期间内, 每 160ms 产生一个业务数据分组, 其大小的变化范围是
10~24Bytes。 假设传输时延预设门限为 X为 10ms, N为 0。
基于上述假设, 本方案的实现流程如下:
第一步: CR系统检测到无线麦克风用户信号同频出现在 CR系统的使用频点上, CR 系统对无线麦克风系统产生千扰, 则 CR系统停止所有业务传输, 并判断此时是否需要立 即退让该使用频点: 当前调度的三个业务均为 VoIP类业务, 其允许时延均大于 10ms, 则 判断为不需立刻退让该使用频点, 启动等待定时器, 定时时长设定为7^ , 同时通知系统 内所有终端, 在7^时间内, 除非收到调度指令, 否则在 '时间内暂停所有业务传输, 并 进入第二步; 第二步: 在7^时间范围内, CR系统持续观测在该使用频点上无线麦克风信号的脉冲 信号的波形, 宽度和重复频率, 寻找 "缝隙式可用频谱" 即空白频谱的出现规律; 在本实 施例中, 规律如图 3C所示, 绿色区域为授权系统占用的时间区域, 白色的区域为可用的 时间区 i或;
第三步: 根据第二步统计的结果, 判断间歇性出现的频谱即空白频语在时域 /频域是否 满足 CR系统业务的出现规律: 对比图 3A及图 3C, 无线麦克风系统每 Is内可以在时域预 留出足够的空间传输 VoIP业务包; 同时, 在频段不可用的时间段, CR需检测无线麦克风 系统的信号是否出现, 如果不再出现, 则恢复正常的业务调度, 并清空等待定时器。
参见图 4, 本申请实施例四提供的一种 CR系统中的传输调度装置, 该装置包括: 授权系统信息数据库 45 ,用于向授权系统出现的规律统计单元提供授权系统频点使用 情况, 以及授权系统的信号出现规律, 授权系统地理位置等信息, 同时根据统计单元归纳 的信息更新数据库;
感知检测单元 40 , CR系统釆用一定的感知检测算法, 感知检测授权系统频点使用信 息及信号出现规律等, 用于向授权系统出现的规律统计单元提供上述信息;
规律统计单元 41 , 用于根据授权系统相关的信息, 统计该频段的使用规律, 并向频谱 退让决策单元及调度单元提供上述信息;
调度单元 42: 用于完成 CR系统用户业务的统计及调度, 同时向频谱退让决策单元提 供 CR系统的业务信息, 如调度用户个数, 调度的用户的业务类型, 并根据频谱退让决策 结果及统计单元提供的规律信息合理调度本系统用户;
频谱退让决策单元 43: 根据调度单元提供的 CR系统业务信息及统计单元提供的规律 信息, 按照对应准则决策是否立刻进行频谱退让;
频谱退让管理单元 44: 根据频谱退让决策单元决策结果, 执行频谱退让相关操作。 下面进行具体说明:
感知检测单元 40,用于确定自身在当前工作频点的信号传输对该工作频点对应的授权 系统的信号传输产生千扰;
规律统计单元 41 , 用于在设定时间段内, 根据所述授权系统的信号传输情况统计空白 频谱的出现规律;
调度单元 42 ,用于根据空白频谱的出现规律和终端的业务传输规律调度终端在空白频 谱上进行业务数据传输; 所述空白频谱为所述工作频点的、 CR 系统进行数据传输不会对 所述授权系统造成千扰的频谱。
进一步的, 该装置还包括:
频谱退让决策单元 43 ,用于在确定自身在当前工作频点的信号传输对该工作频点对应 的授权系统的信号传输产生千扰之后, 确定是否需要立即退出对所述工作频点的使用; 所述调度单元 42用于:
在确定不需要立即退出对所述工作频点的使用后, 在设定时间段内, 根据所述授权系 统的信号传输情况统计空白频谱的出现规律, 根据空白频谱的出现规律和终端的业务传输 规律调度终端在空白频谱上进行业务数据传输。
进一步的, 所述频谱退让决策单元 43用于:
若当前允许业务时延低于预设时延门限的调度终端的个数不小于预设数值,和 /或所述 CR系统有备用频点, 则确定需要立即退出对所述工作频点的使用;
若当前允许业务时延低于预设时延门限的调度终端的个数小于预设数值, 和 /或所述 CR系统无备用频点, 则确定不需要立即退出对所述工作频点的使用。
进一步的, 所述感知检测单元 40用于:
在检测到当前工作频点对应的授权系统的信号出现在所述工作频点上、 并且该信号的 强度大于预设信号强度门限时, 确定该 CR系统在当前工作频点的信号传输对所述授权系 统的信号传输产生同频千扰; 或者,
在检测到当前工作频点对应的授权系统的信号出现在邻频点上、 并且该信号的强度大 于预设信号强度门限时, 确定该 CR系统在当前工作频点的信号传输对所述授权系统的信 号传输产生邻频千扰。
进一步的, 该装置还包括: 频谱退让管理单元 44, 用于执行退出对所述工作频点的使 用的操作;
所述规律统计单元 41用于执行如下步骤:
A、 启动等待定时器;
B、 根据所述授权系统的信号传输情况统计空白频谱的出现规律;
C、 判断所述空白频谱的出现规律是否能够满足终端的业务数据传输需求, 若是, 则 触发所述调度单元 42, 否则, 执行步骤 D;
D、 判断等待定时器是否超时, 若是, 则触发频谱退让管理单元 44, 否则, 返回执行 步骤 B。
进一步的, 所述规律统计单元 41 用于: 按照如下方法根据所述授权系统的信号传输 情况统计空白频谱的出现规律:
从授权系统信息数据库 45 获取所述授权系统的信号的传输特性信息, 或从所述感知 检测单元 40获得信号检测得到的所述授权系统的信号的传输特性信息, 根据获得的传输 特性信息统计空白频谱的出现规律。
进一步的, 所述规律统计单元 41 用于: 按照如下方法判断所述空白频谱的出现规律 是否能够满足终端的业务数据传输需求:
根据终端业务数据的传输周期和传输时间要求确定所述空白频谱能否承载终端的业 务数据,若确定为是,则判断所述空白频谱的出现规律能够满足终端的业务数据传输需求, 否则, 判断所述空白频谱的出现规律不能够满足终端的业务数据传输需求。
进一步的, 所述调度单元 42 用于: 按照如下方法根据所述空白频谱的出现规律和终 端的业务传输规律调度终端在空白频谱上进行业务数据传输:
根据所述空白频谱的出现规律和终端的业务传输规律 , 釆用半持续调度 SPS或动态调 度方式向终端发送调度信令, 以使终端根据该调度信令在空白频谱上进行业务数据传输。
进一步的, 所述感知检测单元 40还用于:
在所述工作频点的非空白频谱上, 检测所述授权系统的信号是否出现, 若未出现, 则 清空所述等待定时器, 并恢复对所述 CR系统内的终端的业务数据的传输调度。
进一步的, 所述感知检测单元 40还用于:
在确定自身在当前工作频点的信号传输对该工作频点对应的授权系统的信号传输产 生千扰之后, 通知该 CR系统内的终端: 在设定时间段内若收到调度信令则进行业务数据 传输, 否则不进行任何业务数据传输。
进一步的, 所述授权系统为: 雷达系统或无线麦克风系统。
参见图 5 , 本申请实施例五提供的一种 CR系统中的传输调度装置, 该装置包括: 处理器 50 ,用于确定自身在当前工作频点的信号传输对该工作频点对应的授权系统的 信号传输产生千扰, 在设定时间段内, 根据所述授权系统的信号传输情况统计空白频谱的 出现规律 , 根据空白频谱的出现规律和终端的业务传输规律调度终端在空白频谱上进行业 务数据传输; 所述空白频谱为所述工作频点的、 CR 系统进行数据传输不会对所述授权系
统造成千扰的频谱;
收发机 51 , 用于在处理器 50的控制下接收和发送数据。
较佳地, 处理器 50还用于:
在确定自身在当前工作频点的信号传输对该工作频点对应的授权系统的信号传输产 生千扰之后, 确定是否需要立即退出对所述工作频点的使用; 在确定不需要立即退出对所 述工作频点的使用后, 在设定时间段内, 根据所述授权系统的信号传输情况统计空白频谱 的出现规律 , 根据空白频谱的出现规律和终端的业务传输规律调度终端在空白频谱上进行 业务数据传输。
较佳地, 处理器 50还用于:
若当前允许业务时延低于预设时延门限的调度终端的个数不小于预设数值,和 /或所述 CR系统有备用频点, 则确定需要立即退出对所述工作频点的使用;
若当前允许业务时延低于预设时延门限的调度终端的个数小于预设数值, 和 /或所述 CR系统无备用频点, 则确定不需要立即退出对所述工作频点的使用。
较佳地, 处理器 50还用于:
在检测到当前工作频点对应的授权系统的信号出现在所述工作频点上、 并且该信号的 强度大于预设信号强度门限时, 确定该 CR系统在当前工作频点的信号传输对所述授权系 统的信号传输产生同频千扰; 或者,
在检测到当前工作频点对应的授权系统的信号出现在邻频点上、 并且该信号的强度大 于预设信号强度门限时, 确定该 CR系统在当前工作频点的信号传输对所述授权系统的信 号传输产生邻频千扰。
较佳地, 处理器 50还用于: 执行退出对所述工作频点的使用的操作; 执行如下步骤:
A、 启动等待定时器;
B、 根据所述授权系统的信号传输情况统计空白频谱的出现规律;
C、 判断所述空白频谱的出现规律是否能够满足终端的业务数据传输需求, 若是, 则 触发所述调度单元 42, 否则, 执行步骤 D;
D、 判断等待定时器是否超时, 若是, 则触发频谱退让管理单元 44, 否则, 返回执行 步骤 B。
较佳地, 处理器 50还用于: 按照如下方法根据所述授权系统的信号传输情况统计空 白频谱的出现规律: 获取所述授权系统的信号的传输特性信息, 或从所述感知检测单元 40 获得信号检测得到的所述授权系统的信号的传输特性信息, 根据获得的传输特性信息统计 空白频谱的出现规律。
较佳地, 处理器 50还用于: 按照如下方法判断所述空白频谱的出现规律是否能够满 足终端的业务数据传输需求:
根据终端业务数据的传输周期和传输时间要求确定所述空白频谱能否承载终端的业 务数据,若确定为是,则判断所述空白频谱的出现规律能够满足终端的业务数据传输需求, 否则, 判断所述空白频谱的出现规律不能够满足终端的业务数据传输需求。
较佳地, 处理器 50还用于: 按照如下方法根据所述空白频谱的出现规律和终端的业 务传输规律调度终端在空白频谱上进行业务数据传输:
根据所述空白频谱的出现规律和终端的业务传输规律 , 釆用半持续调度 SPS或动态调 度方式向终端发送调度信令, 以使终端根据该调度信令在空白频谱上进行业务数据传输。
较佳地, 处理器 50还用于:
在所述工作频点的非空白频谱上, 检测所述授权系统的信号是否出现, 若未出现, 则 清空所述等待定时器, 并恢复对所述 CR系统内的终端的业务数据的传输调度。
较佳地, 处理器 50还用于:
在确定自身在当前工作频点的信号传输对该工作频点对应的授权系统的信号传输产 生千扰之后, 通知该 CR系统内的终端: 在设定时间段内若收到调度信令则进行业务数据 传输, 否则不进行任何业务数据传输。
进一步的, 所述授权系统为: 雷达系统或无线麦克风系统。
其中, 在图 5 中, 总线架构可以包括任意数量的互联的总线和桥, 具体由处理器 50 代表的一个或多个处理器和存储器 52代表的存储器的各种电路链接在一起。 总线架构还 可以将诸如外围设备、 稳压器和功率管理电路等之类的各种其他电路链接在一起, 这些都 是本领域所公知的, 因此, 本文不再对其进行进一步描述。 总线接口提供接口。 收发机 51 可以是多个元件, 即包括发送机和接收机, 提供用于在传输介盾上与各种其他装置通信的 单元。 处理器 50负责管理总线架构和通常的处理, 存储器 52可以存储处理器 50在执行 操作时所使用的数据。
处理器 50负责管理总线架构和通常的处理, 存储器 52可以存储处理器 50在执行操 作时所使用的数据。
综上, 本申请的有益效果包括:
本申请实施例提供的方案中, CR 系统确定自身在当前工作频点的信号传输对该工作 频点对应的授权系统的信号传输产生千扰后, 在设定时间段内, 根据授权系统的信号传输 情况统计空白频谱的出现规律, 根据空白频谱的出现规律和终端的业务传输规律调度终端 在空白频谱上进行业务数据传输, 空白频谱为该工作频点的、 CR 系统进行数据传输不会
对授权系统造成千扰的频谱。 可见, 本方案中 CR系统确定自身在当前工作频点的信号传 输对该工作频点对应的授权系统的信号传输产生千扰后, 并不立即退出对工作频点的使 用, 而是在一定时间内合理利用工作频点上的空白频谱, 调度终端在空白频谱上进行业务 数据传输, 从而降低了 CR系统由于频繁进行频谱切换造成的系统损耗, 同时通过利用空 白频谱也提高了频谱资源的利用率。
同时对于不具备备用频点 (无退路) 的 CR系统, 仍可以使用 "缝隙式的可用频谱" 即空白频谱, 维持本系统部分业务, 以提高 CR设备利用效率。
本申请是参照根据本申请实施例的方法、 设备(系统)、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理, 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本申请的优选实施例, 但本领域内的技术人员一旦得知了基本创造性概 念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释为包括优选 实施例以及落入本申请范围的所有变更和修改。
显然, 本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和 范围。这样,倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内, 则本申请也意图包含这些改动和变型在内。
Claims
1、 一种认知无线电 CR系统中的传输调度方法, 其特征在于, 该方法包括:
CR 系统确定自身在当前工作频点的信号传输对该工作频点对应的授权系统的信号传 输产生千扰;
所述 CR系统在设定时间段内, 根据所述授权系统的信号传输情况统计空白频谱的出 现规律 , 根据空白频谱的出现规律和终端的业务传输规律调度终端在空白频谱上进行业务 数据传输; 所述空白频谱为所述工作频点的、 CR 系统进行数据传输不会对所述授权系统 造成千扰的频谱。
2、如权利要求 1所述的方法, 其特征在于, 在 CR系统确定自身在当前工作频点的信 号传输对该工作频点对应的授权系统的信号传输产生千扰之后, 且所述 CR系统在设定时 间段内, 根据所述授权系统的信号传输情况统计空白频谱的出现规律, 根据空白频谱的出 现规律和终端的业务传输规律调度终端在空白频谱上进行业务数据传输之前, 进一步包 括:
所述 CR系统确定是否需要立即退出对所述工作频点的使用;
所述 CR系统在设定时间段内, 根据所述授权系统的信号传输情况统计可用时间的出 现规律 , 根据空白频谱的出现规律和终端的业务传输规律调度终端在空白频谱上进行业务 数据传输, 具体包括:
所述 CR系统在确定不需要立即退出对所述工作频点的使用后, 在设定时间段内, 根 据所述授权系统的信号传输情况统计空白频谱的出现规律, 根据空白频谱的出现规律和终 端的业务传输规律调度终端在空白频谱上进行业务数据传输。
3、如权利要求 2所述的方法, 其特征在于, 所述 CR系统确定是否需要立即退出对所 述工作频点的使用, 具体包括:
若当前允许业务时延低于预设时延门限的调度终端的个数不小于预设数值,和 /或所述 CR系统有备用频点, 则所述 CR系统确定需要立即退出对所述工作频点的使用;
若当前允许业务时延低于预设时延门限的调度终端的个数小于预设数值, 和 /或所述 CR系统无备用频点, 则所述 CR系统确定不需要立即退出对所述工作频点的使用。
4、如权利要求 1所述的方法, 其特征在于, 所述 CR系统确定自身在当前工作频点的 信号传输对该工作频点对应的授权系统的信号传输产生千扰, 具体包括:
所述 CR系统在检测到当前工作频点对应的授权系统的信号出现在所述工作频点上、 并且该信号的强度大于预设信号强度门限时, 确定该 CR系统在当前工作频点的信号传输 对所述授权系统的信号传输产生同频千扰; 或者,
所述 CR系统在检测到当前工作频点对应的授权系统的信号出现在邻频点上、 并且该 信号的强度大于预设信号强度门限时, 确定该 CR系统在当前工作频点的信号传输对所述 授权系统的信号传输产生邻频千扰。
5、 如权利要求 1所述的方法, 其特征在于, 所述 CR系统在设定时间段内, 根据所述 授权系统的信号传输情况统计空白频谱的出现规律, 根据空白频谱的出现规律和终端的业 务传输规律调度终端在空白频谱上进行业务数据传输, 具体包括:
A、 CR系统启动等待定时器;
B、 CR系统根据所述授权系统的信号传输情况统计空白频谱的出现规律;
C、 CR系统判断所述空白频谱的出现规律是否能够满足终端的业务数据传输需求, 若 是, 则到步骤 E, 否则, 到步骤 D;
D、 CR系统判断等待定时器是否超时, 若是, 则退出对所述工作频点的使用, 否则, 返回步骤 B;
E、 CR系统根据所述空白频谱的出现规律和终端的业务传输规律调度终端在空白频谱 上进行业务数据传输。
6、 如权利要求 1-5中任一所述的方法, 其特征在于, 所述 CR系统根据所述授权系统 的信号传输情况统计空白频谱的出现规律, 具体包括:
所述 CR系统从授权系统数据库获取所述授权系统的信号的传输特性信息, 或通过信 号检测得到所述授权系统的信号的传输特性信息, 根据获得的传输特性信息统计空白频谱 的出现规律。
7、如权利要求 5所述的方法, 其特征在于, 所述 CR系统判断所述空白频谱的出现规 律是否能够满足终端的业务数据传输需求, 具体包括:
所述 CR系统根据终端业务数据的传输周期和传输时间要求确定所述空白频谱能否承 载终端的业务数据, 若确定为是, 则判断所述空白频谱的出现规律能够满足终端的业务数 据传输需求, 否则, 判断所述空白频谱的出现规律不能够满足终端的业务数据传输需求。
8、 如权利要求 1-5中任一所述的方法, 其特征在于, 所述 CR系统根据所述空白频谱 的出现规律和终端的业务传输规律调度终端在空白频谱上进行业务数据传输, 具体包括: 所述 CR系统根据所述空白频谱的出现规律和终端的业务传输规律 , 釆用半持续调度 SPS或动态调度方式向终端发送调度信令, 以使终端根据该调度信令在空白频谱上进行业 务数据传输。
9、 如权利要求 5所述的方法, 其特征在于, 所述方法进一步包括:
所述 CR系统在所述工作频点的非空白频谱上, 检测所述授权系统的信号是否出现,
若未出现, 则清空所述等待定时器, 并恢复对所述 CR系统内的终端的业务数据的传输调 度。
10、 如权利要求 1-5中任一所述的方法, 其特征在于, 在 CR系统确定自身在当前工 作频点的信号传输对该工作频点对应的授权系统的信号传输产生千扰之后 , 进一步包括:
CR系统通知该 CR系统内的终端:在设定时间段内若收到调度信令则进行业务数据传 输, 否则不进行任何业务数据传输。
11、 如权利要求 1-5中任一所述的方法, 其特征在于, 所述授权系统为: 雷达系统或 无线麦克风系统。
12、 一种认知无线电 CR系统中的传输调度装置, 其特征在于, 该装置包括: 感知检测单元, 用于确定自身在当前工作频点的信号传输对该工作频点对应的授权系 统的信号传输产生千扰;
规律统计单元, 用于在设定时间段内, 根据所述授权系统的信号传输情况统计空白频 谱的出现规律;
调度单元, 用于根据空白频谱的出现规律和终端的业务传输规律调度终端在空白频谱 上进行业务数据传输; 所述空白频谱为所述工作频点的、 CR 系统进行数据传输不会对所 述授权系统造成千扰的频谱。
13、 如权利要求 12所述的装置, 其特征在于, 该装置还包括:
频谱退让决策单元, 用于在确定自身在当前工作频点的信号传输对该工作频点对应的 授权系统的信号传输产生千扰之后, 确定是否需要立即退出对所述工作频点的使用; 所述调度单元用于:
在确定不需要立即退出对所述工作频点的使用后, 在设定时间段内, 根据所述授权系 统的信号传输情况统计空白频谱的出现规律, 根据空白频谱的出现规律和终端的业务传输 规律调度终端在空白频谱上进行业务数据传输。
14、 如权利要求 13所述的装置, 其特征在于, 所述频谱退让决策单元用于: 若当前允许业务时延低于预设时延门限的调度终端的个数不小于预设数值,和 /或所述 CR系统有备用频点, 则所述 CR系统确定需要立即退出对所述工作频点的使用;
若当前允许业务时延低于预设时延门限的调度终端的个数小于预设数值, 和 /或所述 CR系统无备用频点, 则所述 CR系统确定不需要立即退出对所述工作频点的使用。
15、 如权利要求 12所述的装置, 其特征在于, 所述感知检测单元用于:
在检测到当前工作频点对应的授权系统的信号出现在所述工作频点上、 并且该信号的 强度大于预设信号强度门限时, 确定该 CR系统在当前工作频点的信号传输对所述授权系
统的信号传输产生同频千扰; 或者,
在检测到当前工作频点对应的授权系统的信号出现在邻频点上、 并且该信号的强度大 于预设信号强度门限时, 确定该 CR系统在当前工作频点的信号传输对所述授权系统的信 号传输产生邻频千扰。
16、 如权利要求 12 所述的装置, 其特征在于, 该装置还包括: 频谱退让管理单元, 用于执行退出对所述工作频点的使用的操作;
所述规律统计单元用于执行如下步骤:
A、 启动等待定时器;
B、 根据所述授权系统的信号传输情况统计空白频谱的出现规律;
C、 判断所述空白频谱的出现规律是否能够满足终端的业务数据传输需求, 若是, 则 触发所述调度单元, 否则, 执行步骤 D;
D、 判断等待定时器是否超时, 若是, 则触发频谱退让管理单元, 否则, 返回执行步 骤
17、 如权利要求 12-16中任一所述的装置, 其特征在于, 所述规律统计单元用于, 按 照如下方法根据所述授权系统的信号传输情况统计空白频谱的出现规律:
从授权系统信息数据库获取所述授权系统的信号的传输特性信息, 或从所述感知检测 单元获得信号检测得到的所述授权系统的信号的传输特性信息, 根据获得的传输特性信息 统计空白频谱的出现规律。
18、 如权利要求 16 所述的装置, 其特征在于, 所述规律统计单元用于, 按照如下方 法判断所述空白频谱的出现规律是否能够满足终端的业务数据传输需求:
根据终端业务数据的传输周期和传输时间要求确定所述空白频谱能否承载终端的业 务数据,若确定为是,则判断所述空白频谱的出现规律能够满足终端的业务数据传输需求, 否则, 判断所述空白频谱的出现规律不能够满足终端的业务数据传输需求。
19、 如权利要求 12-16中任一所述的装置, 其特征在于, 所述调度单元用于, 按照如 下方法根据所述空白频谱的出现规律和终端的业务传输规律调度终端在空白频谱上进行 业务数据传输:
根据所述空白频谱的出现规律和终端的业务传输规律 , 釆用半持续调度 SPS或动态调 度方式向终端发送调度信令, 以使终端根据该调度信令在空白频谱上进行业务数据传输。
20、 如权利要求 16所述的装置, 其特征在于, 所述感知检测单元还用于:
在所述工作频点的非空白频谱上, 检测所述授权系统的信号是否出现, 若未出现, 则 清空所述等待定时器, 并恢复对所述 CR系统内的终端的业务数据的传输调度。
21、 如权利要求 12-16中任一所述的装置, 其特征在于, 所述感知检测单元还用于: 在确定自身在当前工作频点的信号传输对该工作频点对应的授权系统的信号传输产 生千扰之后, 通知该 CR系统内的终端: 在设定时间段内若收到调度信令则进行业务数据 传输, 否则不进行任何业务数据传输。
22、 如权利要求 12-16中任一所述的装置, 其特征在于, 所述授权系统为: 雷达系统 或无线麦克风系统。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310253638.1 | 2013-06-24 | ||
| CN201310253638.1A CN104244431B (zh) | 2013-06-24 | 2013-06-24 | 认知无线电系统中的传输调度方法和装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014206252A1 true WO2014206252A1 (zh) | 2014-12-31 |
Family
ID=52141048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2014/080483 Ceased WO2014206252A1 (zh) | 2013-06-24 | 2014-06-23 | 认知无线电系统中的传输调度方法和装置 |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104244431B (zh) |
| WO (1) | WO2014206252A1 (zh) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450569A (zh) * | 2018-11-19 | 2019-03-08 | 中国舰船研究设计中心 | 一种电子设备频点互扰快速预测方法 |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104717661A (zh) * | 2015-02-10 | 2015-06-17 | 北京邮电大学 | 一种认知lte规避同频脉冲的方法及装置 |
| CN105992386A (zh) * | 2015-02-12 | 2016-10-05 | 中兴通讯股份有限公司 | 非授权载波的激活方法及装置 |
| CN104735794B (zh) * | 2015-03-05 | 2018-05-01 | 京信通信系统(中国)有限公司 | 一种在半静态调度下资源分配的方法及装置 |
| CN109982331B (zh) * | 2019-03-29 | 2023-02-07 | 上海翎沃电子科技有限公司 | 一种频谱干扰退让选择方法及系统 |
| CN111525969B (zh) * | 2020-04-28 | 2022-04-19 | 国家广播电视总局广播电视科学研究院 | 基于白频谱数据库的频谱感知方法、终端和系统 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521925A (zh) * | 2009-04-13 | 2009-09-02 | 北京邮电大学 | 降低认知无线电网络通信中断概率的方法 |
| CN101808333A (zh) * | 2010-02-02 | 2010-08-18 | 深圳先进技术研究院 | 共享信道的方法及系统 |
| CN102395171A (zh) * | 2011-11-11 | 2012-03-28 | 苏州大学 | 一种认知无线网络路由的维护方法 |
| CN102457929A (zh) * | 2010-10-15 | 2012-05-16 | 电信科学技术研究院 | 频点迁移触发及频点迁移方法、系统和设备 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7869400B2 (en) * | 2006-10-16 | 2011-01-11 | Stmicroelectronics, Inc. | Method of inter-system coexistence and spectrum sharing for dynamic spectrum access networks-on-demand spectrum contention |
| CN101702635B (zh) * | 2009-10-28 | 2013-06-19 | 北京邮电大学 | 一种基于认知无线电技术进行频谱切换的方法和系统 |
| CN101778396B (zh) * | 2010-01-13 | 2012-05-09 | 南京邮电大学 | 认知用户在机会频谱共享系统中的检测方法 |
-
2013
- 2013-06-24 CN CN201310253638.1A patent/CN104244431B/zh active Active
-
2014
- 2014-06-23 WO PCT/CN2014/080483 patent/WO2014206252A1/zh not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521925A (zh) * | 2009-04-13 | 2009-09-02 | 北京邮电大学 | 降低认知无线电网络通信中断概率的方法 |
| CN101808333A (zh) * | 2010-02-02 | 2010-08-18 | 深圳先进技术研究院 | 共享信道的方法及系统 |
| CN102457929A (zh) * | 2010-10-15 | 2012-05-16 | 电信科学技术研究院 | 频点迁移触发及频点迁移方法、系统和设备 |
| CN102395171A (zh) * | 2011-11-11 | 2012-03-28 | 苏州大学 | 一种认知无线网络路由的维护方法 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450569A (zh) * | 2018-11-19 | 2019-03-08 | 中国舰船研究设计中心 | 一种电子设备频点互扰快速预测方法 |
| CN109450569B (zh) * | 2018-11-19 | 2021-05-25 | 中国舰船研究设计中心 | 一种电子设备频点互扰快速预测方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104244431A (zh) | 2014-12-24 |
| CN104244431B (zh) | 2017-12-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11082895B2 (en) | Subband switching method, device, and system | |
| US9185737B2 (en) | Method for controlling multiple communication systems to implement communication and user equipment | |
| Van Dam et al. | An adaptive energy-efficient MAC protocol for wireless sensor networks | |
| WO2014206252A1 (zh) | 认知无线电系统中的传输调度方法和装置 | |
| US10098003B2 (en) | Access node, a communication device, respective method performed thereby for carrier hopping | |
| WO2017004901A1 (zh) | 信道占用概率的调整方法、调整系统和基站 | |
| CN109076571B (zh) | 一种控制信息的处理方法、基站及终端 | |
| WO2015131749A1 (zh) | 一种信号处理方法、基站和终端 | |
| WO2023046196A1 (zh) | 辅助信息上报方法、业务配置方法、终端及网络侧设备 | |
| WO2016070772A1 (zh) | 一种进行载波调度的方法和设备 | |
| TW201826834A (zh) | 一種切換方法、基站及終端 | |
| WO2016155563A1 (zh) | 一种非授权载波上传输资源的抢占方法及设备 | |
| JP2018525953A (ja) | データ伝送方法及び装置 | |
| CN103596288B (zh) | 一种lte系统接入认知频谱的方法及系统 | |
| EP3874803A1 (en) | Event-based adaption of ue measurements | |
| KR20240016413A (ko) | 핸드오버 성공 보고(shr)의 생성 방법, 장치, 단말 및 매체 | |
| WO2012171389A1 (zh) | 频段切换通知及频段切换方法、系统和设备 | |
| CN111010743B (zh) | 非授权频谱占空比共存方式中WiFi系统性能保证方法 | |
| Yoo et al. | DCR‐MAC: distributed cognitive radio MAC protocol for wireless ad hoc networks | |
| US20160205184A1 (en) | Traffic Coordination for Communication Sessions Involving Wireless Terminals and Server Devices | |
| CN107079300B (zh) | 使用频谱资源进行通信的方法和通信设备 | |
| US20240206009A1 (en) | Transmission processing method and apparatus, terminal, and storage medium | |
| CN108601091A (zh) | 一种LTE-U/WiFi共用未授权频段避免碰撞的办法 | |
| US9900130B2 (en) | Method and device for sending signal, and storage medium | |
| CN103731838B (zh) | 一种认知无线电系统中的协作频谱感知方法和设备 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14817414 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 14817414 Country of ref document: EP Kind code of ref document: A1 |