WO2011157163A1 - Method and device for quiet period synchronization - Google Patents

Abstract

A method and device for quiet period synchronization are provided in the present embodiments. The method includes: a quiet period configuration of a common control channel coverage area is acquired; the same cognitive frequency point in the quiet period configuration is provide with the same quiet period configuration; a quiet period configuration information is broadcasted to the common control channel coverage area according to the quiet period configuration; the quiet period configuration information is used for configuring the same quiet period configuration to devices provided with the same cognitive frequency point in the common control channel coverage area; and the quiet period configuration information comprises a cognitive frequency point, a quiet period cycle of the cognitive frequency point, a quiet period offset and quiet period duration. The present embodiments solves the problem of quiet period asynchronization between cognitive cells in prior art, and improves the spectrum efficiency.

Description

 Quiet period synchronization method and device

This application is submitted to the Chinese Patent Office on June 13, 2010, and the application number is CN201010205002.6, the entire disclosure of which is hereby incorporated by reference in its entirety in its entirety in its entirety in the the the the the the the the the

Technical field

Embodiments of the present invention relate to the field of technology, and in particular, to a silent period synchronization method and apparatus.

Background technique

Cognitive radio Radio, referred to as CR, is the most promising technology to solve the current spectrum resource shortage. By perceiving the wireless spectrum environment, cognitive radio can sense the unoccupied frequency bands that appear anywhere and anytime, and dynamically access these frequency bands without disturbing the main users (the original fixed-distribution frequency users), so as to improve the use of the slotted pins. Spectrum utilization.

When cognitive devices perform spectrum sensing, they usually adopt a periodic sensing scheme. The perceived frequency, perceived duration, and perceived period are called silent period configurations. Cognitive devices with the same perceptual frequency point have the same silent period configuration such as duration of perception, perceptual period, and perceived start time, indicating that these cognitive devices remain synchronized during the silent period. The silent period synchronization includes silent period synchronization within the cognitive cell and silent period synchronization between cognitive cells. In the prior art, in order to ensure the silent period synchronization in the cognitive cell, the base station of each cognitive cell sends a silent period message in the super frame header. After receiving the silent period message, the cognitive device in the cognitive cell performs the silent period configuration of the current cell. The cognitive device in the cognitive cell acquires a silent period message from the superframe header, thereby ensuring that the cognitive device in the cognitive cell performs the same silent period configuration. In addition, the above cognitive cells usually have a small coverage area of about several hundred meters.

The above silent period synchronization method is only applicable to the silent period synchronization in a single cognitive cell, and is not suitable for the silent period synchronization between cognitive cells. However, if the silent period between the cognitive cells is not synchronized, some cognitive devices may perform the spectrum sensing during the silent period, and may consider the signal of the neighboring cell cognitive device as the signal of the local cell, and determine that the spectrum resource is unavailable. As a result, the utilization of spectrum resources is low.

Summary of the invention

The embodiment of the invention provides a silent period synchronization method, device and system, which are used to solve the problem of silent period synchronization between cognitive cells, and improve utilization of spectrum resources.

The embodiment of the invention provides a silent period synchronization method, including:

Obtaining a silent period configuration of a common control channel coverage area; the same sensing frequency point in the silent period configuration has the same silent period period silent period offset and silent period duration;

Silencing period configuration information is broadcasted to the common control channel coverage area according to the silent period configuration, where the silent period configuration information is used to make the devices with the same sensing frequency in the coverage area of the common control channel perform the same silent period. The silent period configuration information includes a sensing frequency point, a silent period of the sensing frequency point, a silent period offset of the sensing frequency point, and a silent period duration of the sensing frequency point.

The embodiment of the invention further provides a silent period synchronization method, including:

Receiving the silent period configuration information of the public control channel broadcast; the silent period configuration information is used to enable the device with the same sensing frequency in the coverage area of the common control channel to perform the same silent period configuration; the silent period configuration information includes the sensing a frequency point, a silent period of the perceived frequency point, a silent period offset of the perceived frequency point, and a silent period duration of the perceived frequency point;

Performing a silent period configuration on the sensing frequency of the self according to the silent period configuration information;

Spectrum sensing is performed according to the silent period configuration.

The embodiment of the invention further provides a common control channel access device, including:

a first acquiring module, configured to acquire a silent period configuration of a common control channel coverage area; the same sensing frequency point in the silent period configuration has the same silent period, a silent period offset, and a silent period duration;

a broadcast module, configured to broadcast quiet period configuration information to the common control channel coverage area according to the silent period configuration, where the silent period configuration information is used to enable the device with the same sensing frequency in the coverage area of the common control channel Performing the same silent period configuration; the silent period configuration information includes a sensing frequency point, a silent period of the sensing frequency point, a silent period offset of the sensing frequency point, and a silent period duration of the sensing frequency point .

An embodiment of the present invention further provides an apparatus, including:

a broadcast receiving module, configured to receive quiet period configuration information of a common control channel broadcast; the silent period configuration information is used to enable devices with the same sensing frequency in the coverage area of the common control channel to perform the same silent period configuration; The silent period configuration information includes a sensing frequency point, a silent period of the sensing frequency point, a silent period offset of the sensing frequency point, and a silent period duration of the sensing frequency point;

a first configuration module, configured to perform a silent period configuration on the sensing frequency of the self according to the silent period configuration information;

The first spectrum sensing module is configured to perform spectrum sensing according to the silent period configuration.

The silent period synchronization method and device provided by the embodiment of the present invention, the silent period configuration information broadcasted by the common control channel access point to the common control channel coverage area includes a silent period configuration of multiple sensing frequency points, wherein the same sensing frequency point The same silent period configuration is adopted, so that the cognitive devices having the same frequency point in the common control channel coverage area are uniformly configured for the silent period, so that the cognitive devices with the same sensing frequency point are kept silent during synchronization. Since the common control channel supports a wide range of coverage, a large number of cognitive cells of different modes of different operators are covered, and different types of cognitive cells are also covered. Therefore, the problem of the silent period of the existing cognitive cells is not synchronized, and the spectrum utilization rate is improved.

The embodiment of the invention further provides another silent period synchronization method, including:

Receiving a silent period configuration request sent by the public control channel coverage area device, where the silent period configuration request includes a sensing frequency point of the device;

Sending the silent period configuration information of the sensing frequency to the device according to the silent period configuration of the common control channel coverage area; the silent period configuration message includes a silent period of the sensing frequency, the sensing frequency The silent period offset of the point and the silent period duration of the perceived frequency.

The embodiment of the invention further provides another silent period synchronization method, including:

Sending a silent period configuration request to the public control channel access point, where the silent period configuration request includes a sensing frequency point of the device;

Receiving the silent period configuration information sent by the common control channel access point according to the silent period configuration request, where the silent period configuration information includes a silent period of the sensing frequency point, and a silent period offset of the sensing frequency point And the duration of the silent period of the perceived frequency;

The silent period configuration is performed according to the silent period configuration information, and spectrum sensing is performed.

The embodiment of the invention further provides another common control channel access device, including:

a request receiving module, configured to receive a silent period configuration request sent by a common control channel coverage area device, where the silent period configuration request includes a sensing frequency point of the device;

a unicast sending module, configured to send quiet period configuration information of the sensing frequency to the device according to a silent period configuration of the common control channel coverage area; the silent period configuration message includes silence of the sensing frequency point a period period, a silent period offset of the perceived frequency point, and a silent period duration of the perceived frequency point.

Another embodiment of the present invention provides another device, including:

a requesting module, configured to send a silent period configuration request to the common control channel, where the silent period configuration request includes a sensing frequency point of the device;

a second receiving module, configured to receive the silent period configuration information that is sent by the common control channel according to the silent period configuration request, where the silent period configuration information includes a silent period of the sensing frequency point, and the sensing frequency point a silent period offset and a duration of the silent period of the perceived frequency;

a second configuration module, configured to perform a silent period configuration according to the silent period configuration information;

The second spectrum sensing module is configured to perform spectrum sensing in the silent period configuration.

Another silent period synchronization method and apparatus provided by the embodiments of the present invention, the common control channel access point or other network elements of the cognitive network pre-configure the silent period of the sensing frequency points in the coverage area in advance. When the device actively requests the quiet period configuration, the silent period configuration information corresponding to the sensing frequency of the device is sent to the device. Since the common control channel access point or other network elements of the cognitive network have previously configured the silent period of the sensing frequency point uniformly, the same sensing frequency point has the same silent period configuration, so that the common control channel can be covered. The silent period of cognitive devices in the area is kept in sync.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a flowchart of Embodiment 1 of a silent period synchronization method according to the present invention;

2 is a flowchart of Embodiment 2 of a silent period synchronization method according to the present invention;

3A is a signaling flowchart of Embodiment 3 of a silent period synchronization method according to the present invention;

FIG. 3B is a schematic diagram of a silent period configuration of a third embodiment of a silent period synchronization method according to the present invention; FIG.

4A is a flowchart of Embodiment 4 of a silent period synchronization method according to the present invention;

4B is an application scenario diagram of Embodiment 4 of a silent period synchronization method according to the present invention;

4C is a schematic diagram of signal transmission in Embodiment 4 of a silent period synchronization method according to the present invention;

FIG. 5 is a flowchart of Embodiment 1 of another silent period synchronization method according to the present invention;

FIG. 6 is a flowchart of Embodiment 2 of another silent period synchronization method according to the present invention;

7A is a schematic structural diagram of Embodiment 1 of a common control channel access apparatus according to the present invention;

FIG. 7B is a schematic structural diagram of Embodiment 2 of a common control channel access apparatus according to the present invention; FIG.

FIG. 8A is a schematic structural diagram of Embodiment 1 of a device according to the present invention; FIG.

8B is a schematic structural view of a second embodiment of a device according to the present invention;

8C is a schematic structural diagram of a third embodiment of an apparatus according to the present invention;

FIG. 9A is a schematic structural diagram of Embodiment 1 of another common control channel access apparatus according to the present invention; FIG.

FIG. 9B is a schematic structural diagram of Embodiment 2 of another common control channel access apparatus according to the present invention; FIG.

FIG. 10A is a schematic structural diagram of another embodiment of a device according to the present invention; FIG.

FIG. 10B is a schematic structural diagram of another embodiment of an apparatus according to 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.

FIG. 1 is a flowchart of Embodiment 1 of a silent period synchronization method according to the present invention. The execution subject of this embodiment is a common control channel access point. As shown in FIG. 1 , this embodiment includes:

Step 11: Obtain a silent period configuration of a common control channel coverage area; the same sensing frequency point in the silent period configuration has the same silent period, a silent period offset, and a silent period duration;

Common control channel, which can be a cognitive pilot channel (Cognitive Pilot Channel , referred to as CPC), may also be a cell broadcast control channel, paging channel and other common control channels. Taking CPC as an example, the CPC can be carried on an existing wireless access network (such as an existing GSM network), or can be carried in a new wireless access network, regardless of which access network is carried, the CPC access point Supporting a wide range of coverage (coverages ranging from a few kilometers to a few hundred kilometers), it can cover a large number of different types of cells of different operators, and can cover different types of cognitive cells. Therefore, the silent period of the devices of the same sensing frequency in the CPC coverage area is uniformly configured by the CPC, so that the silent periods of all the devices in the CPC coverage area can be synchronized. The device may be a device with spectrum sensing function, and specifically may be a cognitive device.

There are multiple ways to obtain the quiet period configuration of the common control channel coverage area. One of the methods may be: the common control channel access point acquires the spectrum sensing requirement of each cognitive device in the common control channel coverage area. The spectrum sensing requirement sent by the cognitive device includes the cognitive frequency of the cognitive device, the sensing start time, the sensing period, and the sensing duration. The silent period configuration of each of the same sensing frequency points is determined according to each spectrum sensing requirement. According to each spectrum sensing requirement, a unified silent period configuration is performed for the same sensing frequency point.

Another method may be: the public control channel access point receives the silent period configuration of the common control channel coverage area sent by the network element. The network element performs unified configuration on the silent periods of the same sensing frequency points in the coverage area of the common control channel, and then sends the information to the common control channel access point. The network element stores various network information, including: spectrum information that can be perceived, network information that has been established, various policy information (for example, configuration information of a silent period, maximum transmission power allowed by the cognitive device), and the like.

Step 12: Broadcast the silent period configuration information to the common control channel coverage area according to the silent period configuration; the silent period configuration information is used to enable the devices with the same sensing frequency in the coverage area of the common control channel to perform the same silent period configuration; the silent period configuration The information includes a sensing frequency point, a silent period of the sensing frequency point, a silent period offset of the sensing frequency point, and a silent period duration of the sensing frequency point.

Among them, the sensing frequency point: specifies the frequency of spectrum sensing; the silent period offset: specifies the time when the silent period starts; the silent period: specifies the period of spectrum sensing; the duration of the silent period: specifies the sustained spectrum sensing The length of time.

The silent period configuration message broadcast by the common control channel access point may include a silent period configuration of multiple sensing frequency points. The same perceptual frequency points have the same silent period offset, silent period, and silent period duration. After receiving the silent period configuration information of the public control channel broadcast, the cognitive device searches for the perceived frequency point in the silent period configuration information, and then resets the silent period offset according to the silent period information corresponding to the perceived frequency point. The silent period and the silent period duration are configured.

In the silent period synchronization method of the embodiment of the present invention, the silent period configuration information broadcasted by the common control channel access point to the common control channel coverage area includes a silent period configuration of multiple sensing frequency points, wherein the same sensing frequency points have the same silent period configuration. The cognitive devices having the same frequency point in the coverage area of the common control channel are uniformly configured for the silent period, so that the cognitive devices having the same sensing frequency point are kept synchronized during the silent period. Since the common control channel supports large-scale coverage, covering a large number of cognitive cells of different modes of different operators, and covering different types of cognitive cells, the problem of silent period synchronization between existing cognitive cells is solved. Improved spectrum utilization.

FIG. 2 is a flowchart of Embodiment 2 of a silent period synchronization method according to the present invention. The executor of the embodiment of the present invention is a device with a spectrum sensing function, and specifically may be a cognitive device (including a cognitive terminal and a cognitive base station). For the technical solution of the access point side of the common control channel, refer to the description of the corresponding embodiment of FIG. 1. As shown in FIG. 2, this embodiment includes:

Step 21: Receive quiet period configuration information of a common control channel broadcast, where the silent period configuration information is used to perform the same silent period configuration on devices having the same sensing frequency in the coverage area of the common control channel;

The silent period configuration information includes multiple sensing frequency points, a silent period of the sensing frequency point, a silent period offset, and a silent period duration;

Step 22: Perform a silent period configuration on the sensing frequency of the self according to the configuration information of the silent period;

Since the silent period configuration message includes a silent period configuration of multiple sensing frequency points, after receiving the silent period configuration message, the cognitive device searches for a silent period message related to its own sensing frequency point from the static configuration message. And perform silent period configuration.

Step 23: Perform spectrum sensing according to the silent period configuration.

The cognitive device performs spectrum sensing from the detection period of the body within the period of the silent period, and the duration of each spectrum sensing is the duration of the silent period.

In the silent period synchronization method of the embodiment of the present invention, each cognitive device in the coverage area of the common control channel receives the silent period configuration information broadcasted by the common control channel. The same sensing frequency point in the silent period configuration information has the same silent period configuration, so that the cognitive devices with the same frequency point in the common control channel coverage area perform the same silent period configuration, that is, keep silent period synchronization. Since the common control channel covers a large number of cognitive cells of different modes of different operators, the problem of silent period unsynchronization between existing cognitive cells is solved, and the silent period of cognitive devices in different cognitive systems can be solved in a wide range. Stay in sync.

FIG. 3A is a signaling flowchart of Embodiment 3 of a silent period synchronization method according to the present invention. FIG. 3B is a schematic diagram of a silent period configuration of Embodiment 3 of a silent period synchronization method according to the present invention. In this embodiment, the technical solution of the silent period synchronization method is described from the perspective of a CPC access point and a cognitive device. As shown in FIG. 3A, this embodiment includes:

Step 31: The CPC coverage area cognitive device sends a spectrum sensing requirement to the CPC access point;

In cognitive networks, different cognitive devices have different requirements for spectrum sensing due to differences in device devices. For example, some cognitive devices have a perceived frequency. The sensing duration takes 5ms, the sensing period takes 10ms, and some cognitive devices are aware of the frequency. The sensing duration takes 2ms and the sensing period is 10ms. Therefore, in the initial access cognitive network phase, each cognitive device in the CPC coverage area actively sends its spectrum sensing requirement to the CPC access point.

Step 32: The CPC access point determines a silent period configuration of each of the same sensing frequency points according to the spectrum sensing requirement;

After the CPC access point receives the spectrum sensing demand sent by each cognitive device under its coverage, it is subjected to algorithm fusion to silence the same sensing frequency (including: sensing frequency, silent period offset, silent period, and silence). Period duration, etc.) for unified configuration, for example, perceptual frequency The sensing duration is 5ms and the sensing period is 10ms.

Step 33: The CPC access point broadcasts the silent period configuration information to the CPC coverage area.

The CPC access point periodically broadcasts the unified silent period configuration. The silent period configuration information of the broadcast access point includes: a perceived frequency point, a silent period offset, a silent period, and a silent period duration.

Step 34: Each cognitive device performs a silent period configuration on its own sensing frequency according to the silent period configuration information.

Step 35: Each cognitive device performs spectrum sensing according to a silent period configuration.

As shown in FIG. 3B, three cognitive devices in the CPC coverage area: the CR device 1, the CR device 2, and the CR device 3 have the same sensing frequency, and after the silent period configuration according to the silent period configuration message broadcasted by the CPC, the CR The device 1, the CR device 2, and the CR device 3 have the same sensing duration, sensing period, and sensing start time, that is, the silent period configuration is the same, so that the synchronization period is kept synchronized during spectrum sensing.

In the silent period synchronization method of the embodiment of the present invention, the same sensing frequency point in the silent period configuration information broadcasted by the common control channel access point to the common control channel coverage area has the same silent period configuration, so that the common control channel has the same frequency point in the coverage area. The cognitive devices are uniformly configured for silent periods, so that cognitive devices with the same perceived frequency point have the same silent period configuration. Since the common control channel covers a large number of different types of cells of different operators and covers different types of cognitive cells, the problem of the silent period of the existing cognitive cells is solved, and different cognitions are widely performed. The silent period of cognitive devices in the system is kept synchronized, which reduces the false alarm probability of spectrum detection and improves the utilization of spectrum resources.

4A is a flowchart of Embodiment 4 of a silent period synchronization method according to the present invention, FIG. 4B The application scenario diagram of the fourth embodiment of the silent period synchronization method of the present invention, and FIG. 4C is a schematic diagram of signal transmission of the fourth embodiment of the silent period synchronization method according to the present invention. This embodiment is applicable to a scenario in which a cognitive device at the edge of a CPC cell performs a silent period configuration. As shown in FIG. 4A, step 34 of the foregoing third embodiment includes:

Step 341: When receiving the silent period configuration information broadcasted by different common control channels, no signal is sent in each different silent period in the received silent period configuration information;

The silent period configuration information broadcasted by different common control channels may include the same sensing frequency point, but the silent period configuration corresponding to the sensing frequency point (silent period offset, silent period, and silent period duration, etc.) )Not the same. Therefore, when the cognitive device receives the silent period configuration information of the broadcast of the common control channel, the spectrum sensing of the different common control channel coverage areas is mutually interfered, and is not sent during the silent period corresponding to the sensing frequency. signal.

As shown in FIG. 4B, the CR device A is located at the edge of the CPC1 coverage area and also at the edge of the CPC2 coverage area. The CR device A at the edge of the CPC cell receives the silent period configuration information of the CPC1 broadcast, and also receives the silent period configuration message of the CPC2 broadcast. The two silent period configuration information is different. As shown in FIG. 4C, the CR device does not send signals during the two sensing times determined by the two silent period configuration information, thereby avoiding two CPC intra-cell cognitive devices. The spectrum perception interferes with each other.

The CR network at the edge of the CPC cell receives a plurality of silent period configuration information in an extreme case, and selects several CPC silent period configurations that do not transmit signals according to the signal strength of the receiving silent period configuration information.

Step 342: Determine a silent period configuration for performing spectrum sensing according to the received signal strength of the silent period configuration information.

The stronger the signal strength of the received silent period configuration information after the signal is not sent during the sensing time of the two silent period configurations, the closer the cognitive device is to the CPC access point that sends the silent period configuration message. Therefore, the cognitive device configures the silent period of the cognitive device according to the silent period configuration in the silent period configuration information broadcasted by the CPC access point.

In this embodiment, when the cognitive device at the edge of the CPC coverage area receives the silent period configuration message of different CPC broadcasts, the interference is prevented from being interfered with by the spectrum sensing of the different common control channel coverage areas. No signal is sent during all sensing time corresponding to its own sensing frequency in all silent period configuration information. The silent period configuration in the silent period configuration information with the strongest received signal is selected to perform spectrum sensing, thereby solving the problem of silent period synchronization of adjacent CPC coverage intervals.

FIG. 5 is a flowchart of Embodiment 1 of another silent period synchronization method according to the present invention. The difference between the embodiment and the foregoing embodiment is that the common control channel sends a silent period configuration message including the sensing frequency corresponding to the silent period configuration of the device to the device configured for the silent period. This embodiment describes a silent period synchronization method from the perspective of a common control channel access point. As shown in FIG. 5, this embodiment includes:

Step 51: Receive a silent period configuration request sent by the public control channel coverage area device, where the silent period configuration request includes a cognitive frequency point of the cognitive device.

The cognitive device sends request information to the common control channel access point to request a silent period of configuring its own sensing frequency point before performing spectrum sensing. The device may be a device with spectrum sensing function, and specifically may be a cognitive device.

Step 52: Send silent period configuration information of the sensing frequency to the device according to the silent period configuration of the common control channel coverage area; the silent period configuration information includes a silent period, a silent period offset, and a silent period duration of the sensing frequency.

In this embodiment, the common control channel access point may be pre-configured with a silent period configuration of all sensing frequency points in the coverage area, or a silent period configuration of all sensing frequency points in the coverage area may be obtained from other network elements of the CR network. When the cognitive device requests the silent period configuration, the common control channel access point sends a silent period configuration corresponding to the cognitive frequency of the cognitive device to the cognitive device from the silent period configuration of all the sensing frequency points.

Further, before step 52, the method further includes: acquiring a silent period configuration of the common control channel coverage area; and the same sensing frequency point in the silent period configuration has the same silent period configuration. For example, the silent period configuration of all the sensing frequency points in the coverage area is obtained from other network elements of the CR network. The network element stores various network information, including: spectrum information that can be perceived, network information that has been established, various policy information (for example, configuration information of a silent period, maximum transmission power allowed by the cognitive device), and the like.

In the silent period synchronization method of the embodiment of the present invention, the common control channel access point or other network element of the cognitive network pre-configures the silent period of the sensing frequency point in the coverage area. When the cognitive device actively requests the silent period configuration, the silent period configuration information corresponding to the cognitive frequency of the cognitive device is sent to the cognitive device. Since the common control channel access point or other network elements of the cognitive network have previously configured the silent period of the perceived frequency point uniformly, ensuring that the same perceived comrades point has the same silent period configuration, thus enabling the common control channel to be covered. The silent period of cognitive devices in the area is kept in sync.

FIG. 6 is a flowchart of Embodiment 2 of another silent period synchronization method according to the present invention. The difference between this embodiment and the foregoing embodiment is that the device does not receive the silent period configuration information by receiving the broadcast message, but requests the silent period configuration from the public control channel in the requested manner, and then receives the common channel and unicasts the device. Only the sensing frequency of the device corresponds to the silent period configuration message of the silent period configuration. This embodiment describes a silent period synchronization method from the perspective of a common control channel coverage area cognitive device. As shown in FIG. 6, the embodiment includes:

Step 61: Send a silent period configuration request to the public control channel access point, where the silent period configuration request includes the sensing frequency of the device;

The device may be a device with spectrum sensing function, and specifically may be a cognitive device.

Step 62: Receive quiet period configuration information sent by the common control channel access point according to the silent period configuration request, where the silent period configuration information includes a silent period of the sensing frequency point, a silent period offset of the sensing frequency point, and a silent frequency of the sensing frequency point. Duration of time;

Step 63: Perform silent period configuration according to the silent period configuration information, and perform spectrum sensing.

Since a cognitive device at the edge of the common control channel coverage area, the silence request sent by it may be received by two or more common control channel access points. Therefore, it is possible to receive silent period configuration information transmitted by a plurality of common control channels. In order to prevent the interference of the spectrum sensing of the different common control channel coverage areas, the embodiment further includes:

When receiving the silent period configuration information broadcasted by different common control channels, the cognitive device does not send a signal in each of the different silent period periods in the received silent period configuration information; according to the received signal strength of the silent period configuration information Determine the silent period configuration for spectrum sensing. For details, refer to the technical solutions in the corresponding embodiments in FIG. 4A, FIG. 4B and FIG. 4C.

In the silent period synchronization method of the embodiment of the present invention, the common control channel access point or other network element of the cognitive network pre-configures the silent period of the sensing frequency point in the coverage area. When the cognitive device actively requests the silent period configuration, the common control channel access point sends the silent period configuration information corresponding to the cognitive frequency of the cognitive device to the cognitive device. Since the common control channel access point or other network elements of the cognitive network have previously configured the silent period of the sensing frequency point uniformly, it is ensured that the same sensing node has the same silent period configuration. Since the common control channel covers a large number of cognitive cells of different modes of different operators, the problem of silent period unsynchronization between existing cognitive cells is solved, and the silent period of cognitive devices in different cognitive systems can be solved in a wide range. Stay in sync.

FIG. 7A is a schematic structural diagram of Embodiment 1 of a common control channel access apparatus according to the present invention. As shown in FIG. 7A, the embodiment includes: a first obtaining module 71 and a broadcasting module 72.

The first obtaining module 71 is configured to acquire a silent period configuration of a common control channel coverage area; the same sensing frequency point in the silent period configuration has the same silent period, a silent period offset, and a silent period duration;

The broadcast module 72 is configured to broadcast the silent period configuration information to the common control channel coverage area according to the silent period configuration, where the silent period configuration information is used to perform the same silent period configuration on the devices with the same sensing frequency in the coverage area of the common control channel; The silent period configuration information includes a sensing frequency point, a silent period of the sensing frequency point, a silent period offset of the sensing frequency point, and a silent period duration of the sensing frequency point.

As shown in FIG. 7B, the first obtaining module 71 includes an obtaining submodule 711 and a determining submodule 712.

The obtaining sub-module 711 is configured to acquire a spectrum sensing requirement of each device in the coverage area of the common control channel, where the spectrum sensing requirement includes a sensing frequency point, a sensing starting time, a sensing period, and a sensing duration;

The determining sub-module 712 is configured to determine a silent period configuration of each of the same sensing frequency points according to each spectrum sensing requirement.

For the working mechanism of each module in this embodiment, refer to the descriptions of the corresponding embodiments in FIG. 1 and FIG. 3, and details are not described herein.

In the embodiment of the present invention, the public control channel access device, the broadcast module 72 broadcasts the silent period configuration information acquired by the first obtaining module 71 to the common control channel coverage area. The silent period configuration information includes a silent period configuration of the plurality of sensing frequency points, wherein the same sensing frequency points have the same silent period configuration, so that the cognitive devices having the same frequency point in the common control channel coverage area are uniformly configured for the silent period. Thus, devices with the same perceived frequency point are kept silent during synchronization. Since the common control channel supports large-scale coverage, covering a large number of cognitive cells of different modes of different operators, and covering different types of cognitive cells, the problem of silent period synchronization between existing cognitive cells is solved. Increased spectrum utilization,

FIG. 8 is a schematic structural diagram of Embodiment 1 of an apparatus according to the present invention. As shown in FIG. 8A, the embodiment includes: a broadcast receiving module 81, a first configuration module 82, and a first spectrum sensing module 83.

The broadcast receiving module 81 is configured to receive the silent period configuration information of the common control channel broadcast; the silent period configuration information is used to enable the device with the same sensing frequency in the coverage area of the common control channel to perform the same silent period configuration; the silent period configuration information includes Perceptual frequency point, silent period of perceptual frequency point, silent period offset of perceptual frequency point, and silent period duration of perceptual frequency point;

The first configuration module 82 is configured to perform a silent period configuration on the sensing frequency of the self according to the silent period configuration information.

The first spectrum sensing module 83 is configured to perform spectrum sensing according to the silent period configuration.

As shown in FIG. 8B, the embodiment further includes: a requirement sending module 84, configured to send a spectrum sensing requirement to a common control channel access point, where the spectrum sensing requirement includes a sensing frequency point, a sensing starting time, a sensing period, and a sensing duration.

As shown in FIG. 8C, the first configuration module 82 includes a first configuration sub-module 821 and a second configuration sub-module 822.

The first configuration sub-module 821 is configured to not send a signal during all the sensing time corresponding to the frequency of the sensing channel in the silent period configuration information when receiving the silent period configuration information of the different common control channel broadcasts;

The second configuration sub-module 822 is configured to determine a silent period configuration for performing spectrum sensing according to the received signal strength of the silent period configuration information.

The working mechanism of each module in this embodiment is described in the corresponding embodiments of FIG. 2 and FIG. 3. I will not repeat them here.

The device in the embodiment of the present invention may be specifically a device with a spectrum sensing function. The broadcast receiving module 81 receives the silent period configuration information of the common control channel broadcast, and the same sensing frequency points in the silent period configuration information have the same silent period configuration. The first configuration module 82 performs a silent period configuration on the sensing frequency of the sensing channel according to the silent period configuration information received by the broadcast receiving module 81, so that the cognitive devices having the same frequency point in the common control channel coverage area perform the same silent period configuration. Keep silent periods in sync. Since the common control channel covers a large number of cognitive cells of different modes of different operators, the problem of silent period unsynchronization between existing cognitive cells is solved, and the silent period of cognitive devices in different cognitive systems can be solved in a wide range. Stay in sync. Further, the embodiment of the present invention further synchronizes the silent periods between adjacent common control channel coverage areas by using the first configuration submodule 821 and the second configuration submodule 822.

FIG. 9A is a schematic structural diagram of Embodiment 1 of another common control channel access apparatus according to the present invention. As shown in FIG. 9A, the embodiment includes a request receiving module 91 and a unicast sending module 92.

The request receiving module 91 is configured to receive a silent period configuration request sent by the common control channel coverage area device, where the silent period configuration request includes the sensing frequency point of the device;

The unicast sending module 92 is configured to send quiet period configuration information of the sensing frequency to the device according to the silent period configuration of the common control channel coverage area; the silent period configuration information includes a silent period of the sensing frequency, a silent period offset, and The duration of the silent period.

As shown in FIG. 9B, the embodiment further includes: a second obtaining module 93, configured to acquire a silent period configuration of a common control channel coverage area; and the same sensing frequency point in the silent period configuration has the same silent period configuration.

The working mechanism of each module in this embodiment is described in the corresponding embodiment of FIG. 5. I will not repeat them here.

In the embodiment of the present invention, the common control channel access device performs a unified configuration on the silent period of the sensing frequency in the coverage area in advance at the common control channel access point or other network elements of the cognitive network. When the request receiving module 91 receives the silent period configuration request that is sent by the cognitive device, the unicast sending module 92 sends the silent period configuration information corresponding to the cognitive frequency of the cognitive device to the cognitive device. Since the common control channel access point or other network elements of the cognitive network have previously configured the silent period of the perceived frequency point uniformly, ensuring that the same perceived comrades point has the same silent period configuration, thus enabling the common control channel to be covered. The silent period of cognitive devices in the area is kept in sync.

FIG. 10A is a schematic structural diagram of another embodiment of a device according to the present invention. As shown in FIG. 10A, the embodiment includes: a requesting module 101, a second receiving module 102, a second configuration module 103, and a second spectrum sensing module 104.

The requesting module 101 is configured to send a silent period configuration request to the public control channel access point, where the silent period configuration request includes the sensing frequency point of the device;

The second receiving module 102 is configured to receive the silent period configuration information that is sent by the common control channel access point according to the silent period configuration request, where the silent period configuration information includes a silent period of the sensing frequency point, a silent period offset of the sensing frequency point, and The duration of the silent period of the perceived frequency;

The second configuration module 103 is configured to perform a silent period configuration according to the silent period configuration information.

The second spectrum sensing module 104 is configured to perform spectrum sensing during the silent period configuration.

As shown in FIG. 10B, the second configuration module 103 includes a third configuration submodule 1031 and a fourth configuration submodule 1032.

The third configuration sub-module 1031 is configured to not send a signal during each silent period of the silent period configuration information when receiving the silent period configuration information sent by different common control channels;

The fourth configuration sub-module 1032 is configured to determine, according to the received signal strength of the silent period configuration information, a silent period configuration for performing spectrum sensing.

In the device of the embodiment of the present invention, the common control channel access point or other network element of the cognitive network pre-configures the silent period of the sensing frequency in the coverage area. The requesting module 101 actively requests the silent period configuration, and the second receiving module 102 receives the silent period configuration information corresponding to the sensing frequency of the device sent by the common control channel. Since the common control channel access point or other network elements of the cognitive network have previously configured the silent period of the sensing frequency point uniformly, it is ensured that the same sensing node has the same silent period configuration. Since the common control channel covers a large number of cognitive cells of different modes of different operators, the problem of silent period unsynchronization between existing cognitive cells is solved, and the silent period of cognitive devices in different cognitive systems can be solved in a wide range. Stay in sync.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the foregoing embodiments are modified, or the equivalents of the technical features are replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (18)

1. A silent period synchronization method, comprising:

   Obtaining a silent period configuration of a common control channel coverage area; the same sensing frequency point in the silent period configuration has the same silent period, a silent period offset, and a silent period duration;

   Silencing period configuration information is broadcasted to the common control channel coverage area according to the silent period configuration, where the silent period configuration information is used to make the devices with the same sensing frequency in the coverage area of the common control channel perform the same silent period. The silent period configuration information includes a sensing frequency point, a silent period of the sensing frequency point, a silent period offset of the sensing frequency point, and a silent period duration of the sensing frequency point.
2. The silent period synchronization method according to claim 1, wherein the obtaining a silent period configuration of a common control channel coverage area comprises:

   Obtaining a spectrum sensing requirement of each device in the coverage area of the common control channel, where the spectrum sensing requirement includes a sensing frequency point, a sensing starting time, a sensing period, and a sensing duration;

   A silent period configuration of each of the same sensing frequency points is determined according to each of the spectrum sensing requirements.
3. A silent period synchronization method, comprising:

   Receiving the silent period configuration information of the public control channel broadcast; the silent period configuration information is used to enable the device with the same sensing frequency in the coverage area of the common control channel to perform the same silent period configuration; the silent period configuration information includes the sensing a frequency point, a silent period of the perceived frequency point, a silent period offset of the perceived frequency point, and a silent period duration of the perceived frequency point;

   Performing a silent period configuration on the sensing frequency of the self according to the silent period configuration information;

   Spectrum sensing is performed according to the silent period configuration.
4. The silent period synchronization method according to claim 3, further comprising: before the receiving the silent period configuration information broadcasted by the common control channel,

   A spectrum sensing requirement is sent to a common control channel access point, the spectrum sensing requirement including a sensing frequency point, a sensing starting time, a sensing period, and a sensing duration.
5. The silent period synchronization method according to claim 3, wherein the silent period configuration is performed on the sensing frequency of the self according to the silent period configuration information, including:

   When receiving the silent period configuration information broadcasted by different common control channels, no signal is sent during each different silent period in the silent period configuration information;

   The silent period configuration for performing spectrum sensing is determined according to the received signal strength of the silent period configuration information.
6. A silent period synchronization method, comprising:

   Receiving a silent period configuration request sent by the public control channel coverage area device, where the silent period configuration request includes a sensing frequency point of the device;

   Sending the silent period configuration information of the sensing frequency to the device according to the silent period configuration of the common control channel coverage area; the silent period configuration information includes a silent period of the sensing frequency, the sensing frequency The silent period offset of the point and the silent period duration of the perceived frequency.
7. The silent period synchronization method according to claim 6, wherein before the sending the silent period configuration information of the sensing frequency to the device according to the silent period configuration of the common control channel coverage area, the method further includes:

   Obtaining a silent period configuration of a common control channel coverage area; the same sensing frequency point in the silent period configuration has the same silent period, silent period offset, and silent period duration.
8. A silent period synchronization method, comprising:

   Sending a silent period configuration request to the public control channel access point, where the silent period configuration request includes a sensing frequency point of the device;

   Receiving the silent period configuration information sent by the common control channel access point according to the silent period configuration request, where the silent period configuration information includes a silent period of the sensing frequency point, and a silent period offset of the sensing frequency point And the duration of the silent period of the perceived frequency;

   The silent period configuration is performed according to the silent period configuration information, and spectrum sensing is performed.
9. The silent period synchronization method according to claim 8, wherein the silent period configuration is performed according to the silent period configuration information, including:

   When receiving the silent period configuration information sent by different common control channels, no signal is sent during each different silent period in the silent period configuration information;

   The silent period configuration for performing spectrum sensing is determined according to the received signal strength of the silent period configuration information.
10. A common control channel access device, comprising:

    a first acquiring module, configured to acquire a silent period configuration of a common control channel coverage area; the same sensing frequency point in the silent period configuration has the same silent period, a silent period offset, and a silent period duration;

    a broadcast module, configured to broadcast quiet period configuration information to the common control channel coverage area according to the silent period configuration, where the silent period configuration information is used to enable the device with the same sensing frequency in the coverage area of the common control channel Performing the same silent period configuration; the silent period configuration information includes a sensing frequency point, a silent period of the sensing frequency point, a silent period offset of the sensing frequency point, and a silent period duration of the sensing frequency point .
11. The public access channel access device of claim 10, wherein the first obtaining module comprises:

    Obtaining a sub-module, configured to acquire a spectrum sensing requirement of each device in a coverage area of the common control channel, where the spectrum sensing requirement includes a sensing frequency point, a sensing starting time, a sensing period, and a sensing duration;

    The determining submodule is configured to determine a silent period configuration of each of the same sensing frequency points according to each of the spectrum sensing requirements.
12. An apparatus, comprising:

    a broadcast receiving module, configured to receive quiet period configuration information of a common control channel broadcast; the silent period configuration information is used to enable devices with the same sensing frequency in the coverage area of the common control channel to perform the same silent period configuration; The silent period configuration information includes a sensing frequency point, a silent period of the sensing frequency point, a silent period offset of the sensing frequency point, and a silent period duration of the sensing frequency point;

    a first configuration module, configured to perform a silent period configuration on the sensing frequency of the self according to the silent period configuration information;

    The first spectrum sensing module is configured to perform spectrum sensing according to the silent period configuration.
13. The device according to claim 12, further comprising:

    And a demand sending module, configured to send a spectrum sensing requirement to the common control channel access point, where the spectrum sensing requirement includes a sensing frequency point, a sensing starting time, a sensing period, and a sensing duration.
14. The device according to claim 12, wherein the first configuration module comprises:

    a first configuration submodule, configured to not send a signal during each silent period of the silent period configuration information when receiving the silent period configuration information broadcasted by different common control channels;

    The second configuration submodule is configured to determine a silent period configuration for performing spectrum sensing according to the received signal strength of the silent period configuration information.
15. A common control channel access device, comprising:

    a request receiving module, configured to receive a silent period configuration request sent by a common control channel coverage area device, where the silent period configuration request includes a sensing frequency point of the device;

    a unicast sending module, configured to send quiet period configuration information of the sensing frequency to the device according to a silent period configuration of the common control channel coverage area; the silent period configuration message includes silence of the sensing frequency point a period period, a silent period offset of the perceived frequency point, and a silent period duration of the perceived frequency point.
16. The public control channel access device of claim 15, further comprising:

    The second obtaining module is configured to obtain a silent period configuration of the common control channel coverage area; the same sensing frequency point in the silent period configuration has the same silent period, silent period offset, and silent period duration.
17. An apparatus, comprising:

    a requesting module, configured to send a silent period configuration request to the public control channel access point, where the silent period configuration request includes a sensing frequency point of the device;

    a second receiving module, configured to receive the silent period configuration information that is sent by the common control channel access point according to the silent period configuration request, where the silent period configuration information includes a silent period of the sensing frequency point, and the silent period is biased The duration of the shift and the silent period;

    a second configuration module, configured to perform a silent period configuration according to the silent period configuration information;

    The second spectrum sensing module is configured to perform spectrum sensing in the silent period configuration.
18. The terminal according to claim 17, wherein the second configuration module comprises:

    a third configuration submodule, configured to not send a signal during each silent period of the silent period configuration information when receiving the silent period configuration information sent by different common control channels;

    The fourth configuration submodule is configured to determine a silent period configuration for performing spectrum sensing according to the received signal strength of the silent period configuration information.

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