CN103796221B - Method for parameter configuration and equipment in a kind of cognitive radio system - Google Patents
Method for parameter configuration and equipment in a kind of cognitive radio system Download PDFInfo
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Abstract
The invention discloses the method for parameter configuration in a kind of cognitive radio system and equipment, this method includes：Network management device is grouped using the perceptual parameters of each terminal device of determination to each terminal device, makes every group of perceptual parameters all terminal devices suitable for the group；The network management device notifies the group result of terminal device to the terminal device, and corresponding perceptual parameters are organized as belonging to terminal device using the group result acquisition terminal device.In the embodiment of the present invention, base station equipment in CR systems can be directed to each packet transmission perceptual parameters, perceptual parameters are sent one by one so as to avoid to each terminal device, therefore the resource overhead during collaborative spectrum sensing can be reduced, and the Radio Resource that can be used for business to transmit in CR systems is improved, improve the capacity of CR systems.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a parameter configuration method and equipment in a cognitive radio system.
Background
Radio communication spectrum is a precious natural resource, the problem of poor spectrum resource is increasingly serious with the rapid development of radio communication technology, in order to alleviate the current situation of spectrum resource shortage, currently, radio communication spectrum is monitored and researched, and it is found that some frequency bands (such as television frequency bands) are not used in most of time or are not used in most of regions, and the situation of multi-system and multi-user simultaneous competition occurs in some frequency bands, namely, the phenomenon of unbalanced use of spectrum resource exists.
The concept of CR (Cognitive Radio) is being generated in this context, and its basic idea is: on the premise of not causing interference to the authorization system, the CR system can dynamically and opportunistically access the white space for communication by monitoring the change of the current wireless environment; when the CR system opportunistically accesses the white space spectrum of the authorization system, it is assumed that the authorization system service is protected from harmful interference of the CR system, which requires: the CR system has the capability of accurately judging the white space of the authorized system frequency band (namely determining the white space); the CR system finds that the authorized system reappears on the currently used white space spectrum (source working frequency point), and the CR system exits the currently used white space spectrum (i.e., spectrum switching) in time.
Therefore, determining the white space is a precondition for the operation of the CR system, and is significant for the protection of the authorization system, and spectrum sensing is an important means for determining the white space, and spectrum sensing is to determine whether the authorization system occupies the target spectrum by detecting a signal of the authorization system on the target spectrum, i.e., to determine whether the target spectrum is occupied or vacant. Further, the problem of "hidden terminal" caused by shadow effect, multipath fading, etc. causes the CR system using single-point sensing to interfere with the authorized user communication, and in order to overcome this problem, the CR system needs to increase the sensing time or use a more complex sensing algorithm, thereby increasing the complexity of implementing the system.
Therefore, the CR system adopts cooperative sensing to improve the spectrum sensing performance, namely the sensing result of cooperative sensing nodes in a plurality of different geographic positions is utilized to eliminate the problem of a single node, thereby improving the sensing performance. The cooperative sensing comprises centralized cooperative sensing and distributed cooperative sensing; in the centralized cooperative sensing, a plurality of sensing nodes execute spectrum sensing, report local sensing results to a fusion center, and the fusion center processes the results of the plurality of sensing nodes according to a fusion criterion to obtain cooperative sensing results; in distributed cooperative sensing, a plurality of sensing nodes execute spectrum sensing, local sensing results are interacted among the sensing nodes, and each sensing node processes the results of the plurality of sensing nodes according to a fusion criterion to obtain a cooperative sensing result.
The cooperative spectrum sensing mode in the centralized cooperative sensing is as follows: the base station equipment (namely a fusion center) is configured with a plurality of terminal equipment (namely sensing nodes) to sense a certain target frequency spectrum, the plurality of terminal equipment perform frequency spectrum sensing, and report a local frequency spectrum sensing result to the base station equipment, and the base station equipment performs fusion processing on the local sensing results of the plurality of terminal equipment according to a certain fusion rule to obtain a final cooperative sensing result.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:
as shown in fig. 1, in the transmission method, a base station device needs to configure a sensing parameter for each terminal device, and notify the sensing parameter of each terminal device to each terminal device, and when the number of the cooperative sensing terminal devices is large, the base station device sends the sensing parameter to each terminal device, which may result in a very high cooperative sensing resource overhead, thereby reducing wireless resources available for service transmission in the CR system and reducing the capacity of the cognitive radio system.
Disclosure of Invention
The embodiment of the invention provides a parameter configuration method and equipment in a cognitive radio system, which are used for reducing resource overhead in a cooperative spectrum sensing process.
In order to achieve the above object, an embodiment of the present invention provides a method for configuring parameters in a cognitive radio system, including:
the network management equipment groups the terminal equipment by using the determined perception parameters of the terminal equipment, so that the perception parameters of each group are suitable for all the terminal equipment in the group;
and the network management equipment informs the terminal equipment of the grouping result of the terminal equipment, and the terminal equipment acquires the perception parameters corresponding to the group to which the terminal equipment belongs by using the grouping result.
The embodiment of the invention provides a parameter configuration method in a cognitive radio system, which comprises the following steps:
the terminal equipment receives the grouping result from the network management equipment, wherein the perception parameters corresponding to each group are suitable for all the terminal equipment in the group;
and the terminal equipment receives the perception parameters of the group to which the terminal equipment belongs by using the grouping result and performs perception parameter configuration by using the perception parameters of the group to which the terminal equipment belongs.
An embodiment of the present invention provides a network management device, including:
the grouping unit is used for grouping the terminal devices by using the determined sensing parameters of the terminal devices, so that the sensing parameters of each group are suitable for all the terminal devices in the group;
and the sending unit is used for informing the grouping result of the terminal equipment to the terminal equipment, and the terminal equipment acquires the perception parameter corresponding to the group to which the terminal equipment belongs by using the grouping result.
An embodiment of the present invention provides a terminal device, including:
the first receiving unit is used for receiving grouping results from the network management equipment, wherein the perception parameters corresponding to each group are suitable for all terminal equipment in the group;
a second receiving unit, configured to receive, using the grouping result, a sensing parameter of a group to which the terminal device belongs;
and the perception parameter configuration unit is used for performing perception parameter configuration by using the perception parameters of the group to which the terminal equipment belongs.
Compared with the prior art, the embodiment of the invention at least has the following advantages: in the embodiment of the invention, the base station equipment in the CR system can send the sensing parameters for each group, thereby avoiding sending the sensing parameters to each terminal equipment one by one, reducing the resource overhead in the cooperative spectrum sensing process, improving the wireless resources which can be used for service transmission in the CR system and improving the capacity of the CR system.
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In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating a transmission method of a centralized cooperative sensing result of a CR system in the prior art;
fig. 2 is a flowchart illustrating a parameter configuration method in a cognitive radio system according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a parameter configuration method in a cognitive radio system according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a network management device according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a terminal device according to a fourth embodiment of the present invention.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The embodiment of the invention provides a parameter configuration method in a cognitive radio System (CR System), which can be applied to a mobile communication System such as an LTE (Long Term Evolution) System, a TD-SCDMA (Time Division-Synchronous Code Division multiple Access) System, a GSM (Global System of Mobile communication), a WCDMA (wideband Code Division multiple Access) System, a CDMA-2000 (Code Division multiple Access-2000, wideband Code Division multiple Access-2000) System, a WLAN (Wireless Local area networks ) and the like which adopt a cognitive radio technology. As shown in fig. 2, the method comprises the steps of:
step 201, a network management device (e.g., a base station device) selects a terminal device that needs to perform cooperative spectrum sensing, and determines a sensing parameter of each selected terminal device.
Specifically, the network management device may select the terminal device that needs to perform the cooperative spectrum sensing according to information such as the number of target spectrums to be sensed, the number of terminal devices that can be used for performing the cooperative spectrum sensing, and the sensing capability of the terminal device that can be used for performing the cooperative spectrum sensing; or, the network management device may also select a terminal device that needs to perform cooperative spectrum sensing according to the geographic location of the terminal device and/or the load condition of the terminal device; the corresponding selection process is not described in detail herein.
In the embodiment of the present invention, the sensing parameter refers to a parameter for controlling a cooperative spectrum sensing behavior of the terminal device at the network side, and includes, but is not limited to, a target spectrum that the terminal device needs to sense.
Further, the sensing parameters may also include, but are not limited to, one or any combination of the following: the method comprises the steps of sensing period aiming at a target frequency spectrum, sensing time window aiming at the target frequency spectrum, sensing algorithm aiming at the target frequency spectrum, target false alarm probability aiming at the target frequency spectrum, and configuration information (namely a reporting mode, related parameters and the like) reporting of sensing results aiming at the target frequency spectrum, wherein the reporting mode refers to that triggering type reporting or periodic reporting is adopted for reporting the sensing results, and the period of reporting the sensing results is also included in the periodic reporting mode.
In a preferred implementation manner of the embodiment of the present invention, in the process of determining the sensing parameters of each terminal device, for each target spectrum, the network management device may configure the same sensing parameter for the target spectrum for all terminal devices sensing the same target spectrum.
For example, the same sensing algorithm is configured for all terminal devices sensing the same target spectrum, and for example, the sensing algorithms are energy detection or matched filtering detection or autocorrelation detection.
For another example, the same target false alarm probability is configured for all terminal devices sensing the same target spectrum, and the global target false alarm probability for the mth target spectrum is assumed to beThe total number of the terminal devices aiming at the mth target frequency spectrum is NmAccording to the hard decision fusion criterion adopted by the network management equipment, the target false alarm probability (which can be called local target false alarm probability) P of the terminal equipmentlfThe following are calculated respectively:
(1) when the network management equipment adopts the And fusion criterion, the target false alarm probability P of each terminal equipment1fComprises the following steps:
(2) when the network management equipment adopts the Or fusion criterion, the target false alarm probability P of each perception terminal1fComprises the following steps:
(3) when the network management equipment adopts the Voting fusion criterion, the target false alarm probability P of each terminal equipment1fComprises the following steps:wherein, C-1(. cndot.) is an inverse function of C (. cndot.)L is a factor of the Voting criterion and means: when N is presentmWhen the local judgment result fed back by at least L terminal devices in each terminal device is channel occupation, the network management device judges the channel occupation, otherwise, the network management device judges the channel vacancy.
Step 202, the network management device groups each terminal device by using the determined sensing parameters of each terminal device, so that the sensing parameters of each group are applicable to all terminal devices in the group.
In the embodiment of the present invention, the principle of grouping each terminal device is as follows: it needs to ensure that the sensing parameter configuration of each group is applicable to all terminal devices in the group; specifically, the configuration of the sensing parameters in each group is applicable to all terminal devices in the group, and one terminal device may belong to 1 or more groups, and the sensing parameters of the terminal devices belonging to the multiple groups are jointly formed by the sensing parameters in the multiple groups.
In a preferred implementation manner of the embodiment of the present invention, to ensure that the sensing parameter configuration of each group is applicable to all terminal devices in the group, for each target frequency spectrum, the network management device may configure the same sensing parameter corresponding to the target frequency spectrum for all terminal devices that sense the same target frequency spectrum, and divide all terminal devices that sense the target frequency spectrum into groups corresponding to the target frequency spectrum.
For example, the target frequency spectrums to be perceived are a target frequency spectrum 1 and a target frequency spectrum 2, the terminal devices perceiving the target frequency spectrum 1 are a terminal device 1 and a terminal device 2, and the terminal device perceiving the target frequency spectrum 2 is the terminal device 1; then: for a target frequency spectrum 1, configuring a sensing parameter A (namely a sensing parameter corresponding to the target frequency spectrum 1) for a terminal device 1 and a terminal device 2 by a network management device, and dividing the terminal device 1 and the terminal device 2 into a group 1 corresponding to the target frequency spectrum 1; for the target frequency spectrum 2, the network management device configures a sensing parameter B (i.e. a sensing parameter corresponding to the target frequency spectrum 2) for the terminal device 1, and divides the terminal device 1 into a group 2 corresponding to the target frequency spectrum 2; based on the application scenario, the terminal device 1 corresponds to the sensing parameter a and the sensing parameter B and belongs to the group 1 and the group 2, and the terminal device 2 corresponds to the sensing parameter a and belongs to the group 1.
Of course, in practical applications, in order to ensure that the sensing parameter configuration of each group is applicable to all terminal devices in the group, the above preferred embodiment is not limited; for example, for each target spectrum, the network management device may configure the same sensing parameter a for some terminal devices that sense the target spectrum, and may configure the same sensing parameter B for other terminal devices that sense the target spectrum; for other corresponding implementation manners, details are not repeated in the embodiments of the present invention, as long as it is ensured that the sensing parameter configuration of each group is applicable to all terminal devices in the group.
In step 203, the network management device notifies the terminal device of the grouping result of the terminal device.
In this embodiment of the present invention, the network management device sends the grouping result to the terminal device through a dedicated signaling, and when the grouping result is notified to the terminal device, the grouping result includes but is not limited to: the grouping result is the group number of the group (one or more groups) to which the terminal device belongs; or when the group to which the terminal device belongs can be uniquely identified by the sensing parameter, the grouping result is the sensing parameter that uniquely identifies the group (one or more groups) to which the terminal device belongs; or, when the network management device allocates a group terminal ID to each group, and the sensing parameter of each group can be carried by a channel addressed by the corresponding group terminal ID or a channel scheduled by a group terminal ID addressing channel, the grouping result is the group terminal ID of the group (one or more groups) to which the terminal device belongs.
Specifically, in an embodiment where the network management device allocates a group terminal ID to each group, the network management device needs to allocate one group terminal ID (referred to as CRG-UE _ ID) to each group, where the group terminal IDs of different groups are different, and the group terminal IDs are used for all terminal devices in a group to receive the sensing parameter of the group to which the terminal devices belong on the channel addressed by the group terminal ID or the channel scheduled by the channel addressed by the group terminal ID, that is, the sensing parameter of each group can be carried by the channel addressed by the corresponding group terminal ID or the channel scheduled by the channel addressed by the group terminal ID.
Further, the network management device may select a group terminal ID from terminal identifications which are not reserved and not allocated to the terminal device to allocate to a certain group; for example, in an LTE (Long Term Evolution) system, the Group terminal ID may be a CRG-RNTI (Cognitive Radio Group-Radio network temporary Identifier), and the base station device may select one of the RNTIs that are not reserved and not allocated to the terminal device as a CRG-RNTI and allocate the selected RNTI to a certain Group.
In the embodiment of the present invention, in the process that the network management device notifies the grouping result of the terminal device to the terminal device, a notification process of the sensing parameter may also be included, and the notification manner includes but is not limited to:
in the first mode, the network management equipment sends the corresponding relation between the sensing parameters and the grouping results to the terminal equipment in each group through system broadcast messages; wherein the sensing parameters of the plurality of groups may be transmitted through the same system broadcast message or through different system broadcast messages.
For example, when sending through different system broadcast messages, the network management device sends the corresponding relationship between the sensing parameter a and the group number 1 to the terminal devices in each group through the system broadcast messages, and sends the corresponding relationship between the sensing parameter B and the group number 2 to the terminal devices in each group through another system broadcast message; when the sensing parameters A and the group number 1 are sent through the same system broadcast message, the network management equipment sends the corresponding relation between the sensing parameters A and the group number 2 and the corresponding relation between the sensing parameters B and the group number 2 to the terminal equipment in each group through the system broadcast message; further, the processing of the terminal device after receiving the system broadcast message will be described in detail in the subsequent steps.
Secondly, the network management device sends the corresponding relation between the sensing parameters and the grouping result to the terminal devices in each group through a sensing control message, wherein the sensing control message is a message carried on a designated channel (namely a channel specially used for notifying the sensing parameters); wherein the sensing parameters of the plurality of groups may be transmitted through the same sensing control message or through different sensing control messages.
For example, when sending through different sensing control messages, the network management device sends the corresponding relationship between the sensing parameter a and the group number 1 to the terminal devices in each group through the sensing control message, and sends the corresponding relationship between the sensing parameter B and the group number 2 to the terminal devices in each group through another sensing control message; when the sensing control messages are sent through the same, the network management equipment sends the corresponding relation between the sensing parameter A and the group number 1 and the corresponding relation between the sensing parameter B and the group number 2 to the terminal equipment in each group through the sensing control messages; further, the processing of the terminal device after receiving the sensing control message will be described in detail in the subsequent steps.
When the network management equipment allocates group terminal IDs (namely CRG-UE _ IDs) for each group and the perception parameters of each group can be borne by a channel addressed by the corresponding group terminal IDs or a channel scheduled by a group terminal ID addressing channel, the network management equipment respectively sends the perception parameters corresponding to each group to the terminal equipment in each group through the channel addressed by the group terminal IDs or the channel scheduled by the group terminal ID addressing channel; the above channels may include, but are not limited to, control channels or traffic channels.
For example, the network management device sends sensing parameter a to the terminal device through the channel addressed by group terminal ID1, and sends sensing parameter B to the terminal device through the channel addressed by group terminal ID 2; further, the processing of the terminal device will be explained in detail in the subsequent steps.
In the LTE system, a certain group of sensing parameters may be carried by a PDSCH (Physical downlink shared Channel) scheduled by a PDCCH (Physical downlink Control Channel) addressed by its CRG-RNTI; alternatively, the sensing parameters of a certain group may be carried by the PDCCH addressed by its CRG-RNTI.
And 204, the terminal equipment receives the grouping result from the network management equipment, wherein the perception parameters corresponding to each group are suitable for all the terminal equipment in the group.
In the embodiment of the invention, the terminal equipment obtains a corresponding grouping result by receiving a special signaling (carrying the grouping result) from the network management equipment, and determines one or more groups to which the equipment belongs by using the grouping result; wherein, the grouping result is the group number of the group to which the terminal device belongs; or when the group to which the terminal equipment belongs can be uniquely identified by the sensing parameter, the grouping result is the sensing parameter uniquely identifying the group to which the terminal equipment belongs; or, when the network management device allocates a group terminal ID to each group, and the sensing parameter of each group can be carried by a channel addressed by the corresponding group terminal ID or a channel scheduled by a group terminal ID addressing channel, the grouping result is the group terminal ID of the group to which the terminal device belongs.
In step 205, the terminal device receives the sensing parameters of the group to which the terminal device belongs by using the grouping result.
In the embodiment of the present invention, the terminal device receives the sensing parameter of the group (one or more groups) to which the terminal device belongs by using the grouping result, which includes but is not limited to the following modes:
and in the first mode, the terminal equipment receives the system broadcast message carrying the corresponding relation between the sensing parameters and the grouping result, and the sensing parameters of the group to which the terminal equipment belongs are obtained by utilizing the grouping result of the terminal equipment and the corresponding relation between the sensing parameters and the grouping result.
For example, when the network management device sends the corresponding relationship between the sensing parameter a and the group number 1 to the terminal devices in each group through a system broadcast message (e.g., system broadcast message 1), and sends the corresponding relationship between the sensing parameter B and the group number 2 to the terminal devices in each group through another system broadcast message (e.g., system broadcast message 2); assuming that the grouping result of the terminal device is group number 1, the terminal device may obtain the sensing parameter of the group to which the terminal device belongs as sensing parameter a after receiving the system broadcast message 1, and the terminal device may obtain that the system broadcast message 2 does not carry the sensing parameter of the group to which the terminal device belongs after receiving the system broadcast message 2.
For another example, when the network management device sends the corresponding relationship between the sensing parameter a and the group number 1 and the corresponding relationship between the sensing parameter B and the group number 2 to the terminal devices in each group through the system broadcast message; assuming that the grouping result of the terminal device is group number 1, the terminal device can obtain the sensing parameter of the group to which the terminal device belongs as sensing parameter a after receiving the system broadcast message; assuming that the grouping result of the terminal device is group number 2, the terminal device may obtain the sensing parameter of the group to which the terminal device belongs as sensing parameter B after receiving the system broadcast message.
And secondly, the terminal equipment receives a sensing control message carrying the corresponding relation between the sensing parameters and the grouping result, and obtains the sensing parameters of the group to which the terminal equipment belongs by using the grouping result of the terminal equipment and the corresponding relation between the sensing parameters and the grouping result, wherein the sensing control message is a message carried on a specified channel (namely a channel specially used for notifying the sensing parameters).
For example, when the network management device sends the corresponding relationship between the sensing parameter a and the group number 1 to the terminal devices in each group through a sensing control message (such as a sensing control message 1), and sends the corresponding relationship between the sensing parameter B and the group number 2 to the terminal devices in each group through another sensing control message (such as a sensing control message 2); assuming that the grouping result of the terminal device is group number 1, the terminal device can obtain the sensing parameter of the group to which the terminal device belongs as sensing parameter a after receiving the sensing control message 1, and the terminal device can obtain that the sensing parameter of the group to which the terminal device belongs is not carried in the sensing control message 2 after receiving the sensing control message 2.
For another example, when the network management device sends the corresponding relationship between the sensing parameter a and the group number 1 and the corresponding relationship between the sensing parameter B and the group number 2 to the terminal devices in each group through the sensing control message; assuming that the grouping result of the terminal device is group number 1, the terminal device can obtain the sensing parameter of the group to which the terminal device belongs as sensing parameter a after receiving the sensing control message; assuming that the grouping result of the terminal device is group number 2, the terminal device may obtain the sensing parameter of the group to which the terminal device belongs as sensing parameter B after receiving the sensing control message.
And thirdly, when the network management equipment allocates the group terminal ID for each group and the perception parameter of each group can be borne by a channel addressed by the corresponding group terminal ID or a channel scheduled by a group terminal ID addressing channel, the terminal equipment receives the perception parameter corresponding to the group to which the terminal equipment belongs through the channel addressed by the group terminal ID corresponding to the group to which the terminal equipment belongs or the channel scheduled by the group terminal ID addressing channel corresponding to the group to which the terminal equipment belongs.
For example, when the network management device transmits sensing parameter a to the terminal device through the channel addressed by group terminal ID1, and transmits sensing parameter B to the terminal device through the channel addressed by group terminal ID 2; assuming that the grouping result of the terminal device is the group terminal ID1, the terminal device needs to receive the sensing parameter on the channel addressed by the group terminal ID1, and at this time, the sensing parameter a can be received; assuming that the grouping result of the terminal device is group terminal ID2, the terminal device needs to receive the sensing parameter on the channel addressed by group terminal ID2, and can receive sensing parameter B.
And step 206, the terminal device performs sensing parameter configuration by using the sensing parameters of the group to which the terminal device belongs.
In the embodiment of the present invention, the configuring, by the terminal device, the sensing parameter using the sensing parameter of the group to which the terminal device belongs specifically includes: when the group to which the terminal device belongs is multiple, the terminal device performs sensing parameter configuration by using the sensing parameters of the multiple groups to which the terminal device belongs, that is, the sensing parameters of each group of the terminal device form the final sensing parameters of the terminal device, and the sensing parameter configuration is performed based on the final sensing parameters.
In summary, in the embodiments of the present invention, the base station device in the authenticated radio system may send the sensing parameters for each group, so as to avoid sending the sensing parameters to each terminal device one by one, thereby reducing resource overhead in the cooperative spectrum sensing process, improving the radio resources available for service transmission in the authenticated radio system, and improving the capacity of the authenticated radio system.
Example two
In the embodiment, the network management device is a base station device (eNode B), the terminal device is a UE (User Equipment), the sensing parameters according to which the base station devices are grouped are target frequency spectrums to be sensed, and the base station device allocates a CRG-RNTI for each group, where the CRG-RNTI is used for all UEs in a certain group to receive the sensing parameters of the group on a PDSCH scheduled by a PDCCH addressed by the CRG-RNTI. As shown in fig. 3, the method comprises the steps of:
301, a base station device selects UE needing cooperative spectrum sensing and determines sensing parameters of each selected UE; the base station equipment needs to select the UE which needs to perform cooperative spectrum sensing for each target spectrum to be sensed, and decides sensing parameters of each UE for the target spectrum.
Specifically, the base station device may select the UE that needs to perform the cooperative spectrum sensing according to information such as the number of target spectrums to be sensed, the number of UEs that can be used for performing the cooperative spectrum sensing, and the sensing capability of the UEs that can be used for performing the cooperative spectrum sensing; or, the base station device may further select the UE that needs to perform the cooperative spectrum sensing according to the geographical location of the UE and/or the load condition of the UE.
In the embodiment of the invention, the sensing parameter refers to a parameter for controlling the cooperative spectrum sensing behavior of the UE by the network side, and includes but is not limited to a target spectrum which the UE needs to sense; further, the sensing parameters may also include, but are not limited to, one or any combination of the following: the method comprises the steps of sensing period aiming at a target frequency spectrum, sensing time window aiming at the target frequency spectrum, sensing algorithm aiming at the target frequency spectrum, target false alarm probability aiming at the target frequency spectrum, and configuration information (namely a reporting mode, related parameters and the like) reporting of sensing results aiming at the target frequency spectrum, wherein the reporting mode refers to that triggering type reporting or periodic reporting is adopted for reporting the sensing results, and the period of reporting the sensing results is also included in the periodic reporting mode.
In a preferred implementation manner of the embodiment of the present invention, the base station device may configure the same sensing parameter for all UEs sensing the same target spectrum, where the UE senses the target spectrum.
Step 302, the base station device groups each UE by using the sensing parameter of each UE, and the grouping principle is: it needs to be guaranteed that the sensing parameters of each group are applicable to all UEs in the group; specifically, the configuration of the sensing parameters in each group needs to be applicable to all UEs in the group, and one UE may belong to 1 or more groups, and the sensing parameters of the UEs belonging to the multiple groups are jointly formed by the sensing parameters in the multiple groups.
In a preferred grouping manner of the embodiment of the present invention, when the base station device is grouped, the sensing parameter is a target spectrum to be sensed, that is, the base station device groups the selected UEs according to the target spectrum to be sensed, the total grouping number is the total number of the target spectrum to be sensed, each group of UEs set = { all UEs sensing a certain target spectrum }, the sensing parameter of a group is a sensing parameter of the UE in the group on the target spectrum corresponding to the group, and the UE belongs to the group corresponding to the target spectrum to be sensed (the UEs sensing a plurality of target spectrums belong to a plurality of groups), so the sensing parameter of the UE is composed of the sensing parameters of all groups corresponding to the target spectrum to be sensed.
For example, when a target spectrum to be perceived of the CR system is a target spectrum 1, a target spectrum 2, and a target spectrum 3, a UE a perceives the target spectrum 1 and the target spectrum 2, a UE B perceives the target spectrum 2 and the target spectrum 3, a UE C perceives the target spectrum 1, a UE D perceives the target spectrum 2, and a UE E perceives the target spectrum 3, the grouping and perception parameter configuration mode is as follows: the base station device divides the UE into 3 groups, where the 1 st group = { all UEs of sensing target spectrum 1 } = { UE a, UE C }, the 2 nd group = { all UEs of sensing target spectrum 2 } = { UE a, UE B, UE D }, the 3 rd group = { all UEs of sensing target spectrum 3 } = { UE B, UE E }, and the sensing parameters of the 3 groups are the sensing parameters of group 1, the sensing parameters of group 2, and the sensing parameters of group 3, respectively, the sensing parameters of UE a are composed of the sensing parameters of group 1 and group 2, the sensing parameters of UE B are composed of the sensing parameters of group 2 and group 3, the sensing parameters of UE C are composed of the sensing parameters of group 1, the sensing parameters of UE D are composed of the sensing parameters of group 2, and the sensing parameters of UE E are composed of the sensing parameters of group 3.
In a preferred implementation manner of the embodiment of the present invention, the base station device may select one RNTI from the RNTIs which are not reserved and are not allocated to the UE, as a CRG-RNTI and allocate the CRG-RNTI to a certain group, where the CRG-RNTI is used for all UEs in the certain group to receive the sensing parameter of the group on the PDSCH scheduled by the PDCCH addressed by the CRG-RNTI. For example, for the 3 groups, it is assumed that the allocated group RNTIs are respectively CRG1-RNTI, CRG2-RNTI and CRG 3-RNTI; all the UEs of group 1 receive the sensing parameters of group 1 on the PDSCH scheduled by the PDCCH addressed by CRG 1-RNTI; all the UEs of group 2 receive the sensing parameters of group 2 on the PDSCH scheduled by the PDCCH addressed by the CRG 2-RNTI; all UEs of group 3 receive the sensing parameters of group 3 on PDCCH scheduled PDSCH addressed by CRG 3-RNTI.
Step 303, the base station equipment notifies the relevant UE of the grouping result; the base station device may notify the grouping result to the relevant UE through dedicated signaling (e.g., RRC (Radio Resource Control) connection reconfiguration message).
In the embodiment of the present invention, the grouping result is the group number of the group (one or more groups) to which the UE belongs; or, when the group to which the UE belongs can be uniquely identified by the sensing parameter, the grouping result is the sensing parameter that uniquely identifies the group (one or more groups) to which the UE belongs; alternatively, when the base station apparatus allocates a group terminal ID (CRG-RNTI) to each group, the grouping result is a group terminal ID of a group (one or more groups) to which the UE belongs.
For example, for the application shown in step 302, the grouping result for UE a may be: UE A belongs to group 1, the group RNTI of group 1 is CRG1-RNTI, UE A also belongs to group 2, the group RNTI of group 2 is CRG2-RNTI, namely the grouping results are CRG1-RNTI and CRG 2-RNTI.
Step 304, the base station device sends the sensing parameters to the UE.
Specifically, when the base station device sends the sensing parameters to the UE, the sensing parameters are for each group; because the base station equipment allocates the group RNTI for each group, the sensing parameters of each group can be borne by the PDSCH scheduled by the PDCCH addressed by the CRG-RNTI of the base station equipment; for example, for the application shown in step 302, the sensing parameters of group 1 may be carried by the PDSCH scheduled by the PDCCH addressed by CRG 1-RNTI.
Step 305, the UE obtains the sensing parameters of the group to which the UE belongs.
Specifically, since the base station device allocates a group RNTI to each group, the manner of acquiring the sensing parameter of the group to which the UE belongs by the UE is as follows: the UE receives the sensing parameters for each group on the PDSCH scheduled by the PDCCH addressed by the CRG-RNTI of the group, and for the UE belonging to a plurality of groups, the sensing parameters of each group to which the UE belongs need to be acquired to form the final sensing parameters of the UE.
For example, for the application shown in step 302, UE a belongs to group 1 and group 2, and therefore needs to acquire the sensing parameters of group 1 on the PDSCH scheduled by the PDCCH addressed by CRG1-RNTI and needs to acquire the sensing parameters of group 2 on the PDSCH scheduled by the PDCCH addressed by CRG2-RNTI, and the sensing parameters of UE a are composed of the sensing parameters of group 1 and group 2.
Step 306, the UE performs specific spectrum sensing parameter configuration according to the received sensing parameters.
In summary, in the embodiments of the present invention, the base station device in the authenticated radio system may send the sensing parameters for each group, so as to avoid sending the sensing parameters to each terminal device one by one, thereby reducing resource overhead in the cooperative spectrum sensing process, improving the radio resources available for service transmission in the authenticated radio system, and improving the capacity of the authenticated radio system.
EXAMPLE III
Based on the same inventive concept as the above method, an embodiment of the present invention further provides a network management device, as shown in fig. 4, where the network management device includes:
the grouping unit 11 is configured to group the terminal devices by using the determined sensing parameters of the terminal devices, so that the sensing parameters of each group are applicable to all the terminal devices in the group;
a sending unit 12, configured to notify the grouping result of the terminal device to the terminal device, and the terminal device obtains the sensing parameter corresponding to the group to which the terminal device belongs by using the grouping result.
In this embodiment of the present invention, the sensing parameter of each terminal device determined by the grouping unit 11 includes a target frequency spectrum that the terminal device needs to sense.
The grouping unit 11 is further configured to configure, for each target frequency spectrum, the same sensing parameter corresponding to the target frequency spectrum for all terminal devices sensing the same target frequency spectrum, and divide all terminal devices sensing the target frequency spectrum into groups corresponding to the target frequency spectrum.
In an embodiment of the present invention, the sensing parameters further include one or any combination of the following: and reporting configuration information according to a sensing period of the target frequency spectrum, a sensing time window of the target frequency spectrum, a sensing algorithm of the target frequency spectrum, a target false alarm probability of the target frequency spectrum and a sensing result of the target frequency spectrum.
In this embodiment of the present invention, when the sending unit 12 notifies the grouping result of the terminal device to the terminal device, the grouping result is a group number of a group to which the terminal device belongs; or,
when the group to which the terminal device belongs can be uniquely identified by the sensing parameter, the sending unit 12 is configured to notify the terminal device of a grouping result of the terminal device, where the grouping result is the sensing parameter uniquely identifying the group to which the terminal device belongs; or,
when a group terminal ID is allocated to each group and a sensing parameter of each group can be carried by a channel addressed by a corresponding group terminal ID or a channel scheduled by a group terminal ID addressing channel, when the sending unit 12 notifies the terminal device of a grouping result of the terminal device, the grouping result is a group terminal ID of a group to which the terminal device belongs.
In this embodiment of the present invention, the sending unit 12 is further configured to send the corresponding relationship between the sensing parameter and the grouping result to the terminal devices in each group through a system broadcast message; or,
the sending unit 12 is further configured to send the corresponding relationship between the sensing parameters and the grouping results to the terminal devices in each group through a sensing control message, where the sensing control message is a message carried on an assigned channel; or,
when group terminal IDs are allocated to each group and sensing parameters of each group can be carried by a channel addressed by the corresponding group terminal ID or a channel scheduled by the group terminal ID addressing channel, the sending unit 12 is further configured to send the sensing parameters corresponding to each group to terminal devices in each group respectively through the channel addressed by the group terminal ID or the channel scheduled by the group terminal ID addressing channel.
The modules of the device can be integrated into a whole or can be separately deployed. The modules can be combined into one module, and can also be further split into a plurality of sub-modules.
Example four
Based on the same inventive concept as the above method, an embodiment of the present invention further provides a terminal device, as shown in fig. 5, where the terminal device includes:
a first receiving unit 21, configured to receive a grouping result from a network management device, where a sensing parameter corresponding to each group is applicable to all terminal devices in the group;
a second receiving unit 22, configured to receive, by using the grouping result, the sensing parameter of the group to which the terminal device belongs;
and the sensing parameter configuration unit 23 is configured to perform sensing parameter configuration by using the sensing parameters of the group to which the terminal device belongs.
In this embodiment of the present invention, the sensing parameter received by the second receiving unit 22 includes a target frequency spectrum that needs to be sensed by the terminal device.
In an embodiment of the present invention, the sensing parameters further include one or any combination of the following: and reporting configuration information according to a sensing period of the target frequency spectrum, a sensing time window of the target frequency spectrum, a sensing algorithm of the target frequency spectrum, a target false alarm probability of the target frequency spectrum and a sensing result of the target frequency spectrum.
In this embodiment of the present invention, when receiving a grouping result from a network management device, the first receiving unit 21 determines that the grouping result is a group number of a group to which the terminal device belongs; or,
when the group to which the terminal device belongs can be uniquely identified by the sensing parameter, the first receiving unit 21 receives a grouping result from the network management device, where the grouping result is the sensing parameter that uniquely identifies the group to which the terminal device belongs; or,
when a group terminal ID is allocated to each group and a sensing parameter of each group can be carried by a channel addressed by a corresponding group terminal ID or a channel scheduled by a group terminal ID addressing channel, when the first receiving unit 21 receives a grouping result from the network management device, the grouping result is a group terminal ID of a group to which the terminal device belongs.
In this embodiment of the present invention, the second receiving unit 22 is specifically configured to receive a system broadcast message carrying a correspondence between a sensing parameter and a grouping result, and obtain the sensing parameter of a group to which the terminal device belongs by using the grouping result of the terminal device and the correspondence between the sensing parameter and the grouping result; or,
the second receiving unit 22 is specifically configured to receive a sensing control message carrying a corresponding relationship between a sensing parameter and a grouping result, and obtain the sensing parameter of a group to which the terminal device belongs by using the grouping result of the terminal device and the corresponding relationship between the sensing parameter and the grouping result, where the sensing control message is a message carried on a designated channel; or,
when group terminal IDs are allocated to each group and sensing parameters of each group can be borne by a channel addressed by the corresponding group terminal ID or a channel scheduled by a group terminal ID addressing channel, the second receiving unit 22 is specifically configured to receive the sensing parameters corresponding to the group to which the terminal device belongs through the channel addressed by the group terminal ID corresponding to the group to which the terminal device belongs or the channel scheduled by the group terminal ID addressing channel corresponding to the group to which the terminal device belongs.
In this embodiment of the present invention, the sensing parameter configuration unit 23 is specifically configured to, when there are a plurality of groups to which the device belongs, perform sensing parameter configuration by using the sensing parameters of the plurality of groups to which the device belongs.
The modules of the device can be integrated into a whole or can be separately deployed. The modules can be combined into one module, and can also be further split into a plurality of sub-modules.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred embodiment and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, and may be correspondingly changed in one or more devices different from the embodiments. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (18)
1. A method for configuring parameters in a cognitive radio system, the method comprising:
the network management equipment groups the terminal equipment by using the determined sensing parameters of the terminal equipment, so that the sensing parameters of each group are applicable to all the terminal equipment in the group, and the sensing parameters refer to parameters for controlling the cooperative spectrum sensing behavior of the terminal equipment at the network side;
and the network management equipment informs the terminal equipment of the grouping result of the terminal equipment, and the terminal equipment acquires the perception parameters corresponding to the group to which the terminal equipment belongs by using the grouping result.
2. The method of claim 1, wherein the sensing parameters comprise a target spectrum that a terminal device needs to sense.
3. The method of claim 2, wherein the network management device determines the sensing parameters of each terminal device, and performs the grouping process for each terminal device using the sensing parameters of each terminal device, further comprising:
for each target frequency spectrum, the network management device configures the same sensing parameters corresponding to the target frequency spectrum for all terminal devices sensing the same target frequency spectrum, and divides all terminal devices sensing the target frequency spectrum into groups corresponding to the target frequency spectrum.
4. The method according to claim 1, characterized in that, when the network management device notifies the terminal device of a grouping result of the terminal device;
the grouping result is the group number of the group to which the terminal equipment belongs; or,
when the group to which the terminal equipment belongs can be uniquely identified by the sensing parameter, the grouping result is the sensing parameter which uniquely identifies the group to which the terminal equipment belongs; or,
and when the group terminal identification ID is allocated to each group and the perception parameter of each group can be borne by a channel addressed by the corresponding group terminal ID or a channel scheduled by a group terminal ID addressing channel, the grouping result is the group terminal ID of the group to which the terminal equipment belongs.
5. The method of claim 1, further comprising:
the network management equipment sends the corresponding relation between the sensing parameters and the grouping results to the terminal equipment in each group through system broadcast messages; or,
the network management equipment sends the corresponding relation between the sensing parameters and the grouping results to the terminal equipment in each group through a sensing control message, wherein the sensing control message is a message carried on a specified channel; or,
when group terminal IDs are allocated for each group and sensing parameters of each group can be borne by a channel addressed by the corresponding group terminal IDs or a channel scheduled by the group terminal ID addressing channel, the network management equipment respectively sends the sensing parameters corresponding to each group to the terminal equipment in each group through the channel addressed by the group terminal IDs or the channel scheduled by the group terminal ID addressing channel.
6. A method for configuring parameters in a cognitive radio system, the method comprising:
the terminal equipment receives a grouping result from the network management equipment, wherein the sensing parameters corresponding to each group are suitable for all the terminal equipment in the group, and the sensing parameters refer to parameters for controlling the cooperative spectrum sensing behavior of the terminal equipment by the network side;
and the terminal equipment receives the perception parameters of the group to which the terminal equipment belongs by using the grouping result and performs perception parameter configuration by using the perception parameters of the group to which the terminal equipment belongs.
7. The method of claim 6, wherein the sensing parameters comprise a target spectrum that a terminal device needs to sense.
8. The method of claim 6, wherein the terminal device, upon receiving the grouping result from the network management device;
the grouping result is the group number of the group to which the terminal equipment belongs; or,
when the group to which the terminal equipment belongs can be uniquely identified by the sensing parameter, the grouping result is the sensing parameter which uniquely identifies the group to which the terminal equipment belongs; or,
and when the group terminal identification ID is allocated to each group and the perception parameter of each group can be borne by a channel addressed by the corresponding group terminal ID or a channel scheduled by a group terminal ID addressing channel, the grouping result is the group terminal ID of the group to which the terminal equipment belongs.
9. The method of claim 6, further comprising:
the terminal equipment receives a system broadcast message carrying a corresponding relation between a sensing parameter and a grouping result, and obtains the sensing parameter of a group to which the terminal equipment belongs by using the grouping result of the terminal equipment and the corresponding relation between the sensing parameter and the grouping result; or,
the terminal equipment receives a sensing control message carrying a corresponding relation between a sensing parameter and a grouping result, and obtains the sensing parameter of a group to which the terminal equipment belongs by using the grouping result of the terminal equipment and the corresponding relation between the sensing parameter and the grouping result, wherein the sensing control message is a message carried on a specified channel; or,
when group terminal IDs are allocated to each group and sensing parameters of each group can be borne by a channel addressed by the corresponding group terminal IDs or a channel scheduled by a group terminal ID addressing channel, the terminal equipment receives the sensing parameters corresponding to the group to which the terminal equipment belongs through the channel addressed by the group terminal IDs corresponding to the group to which the terminal equipment belongs or the channel scheduled by the group terminal ID addressing channel corresponding to the group to which the terminal equipment belongs.
10. A network management device, comprising:
the grouping unit is used for grouping the terminal devices by using the determined sensing parameters of the terminal devices, so that the sensing parameters of each group are applicable to all the terminal devices in the group, and the sensing parameters refer to parameters for controlling the cooperative spectrum sensing behavior of the terminal devices at the network side;
and the sending unit is used for informing the grouping result of the terminal equipment to the terminal equipment, and the terminal equipment acquires the perception parameter corresponding to the group to which the terminal equipment belongs by using the grouping result.
11. The network management device according to claim 10, wherein the sensing parameter of each terminal device determined by the grouping unit includes a target spectrum that the terminal device needs to sense.
12. The network management device of claim 11,
the grouping unit is further configured to configure, for each target spectrum, the same sensing parameter corresponding to the target spectrum for all terminal devices sensing the same target spectrum, and divide all terminal devices sensing the target spectrum into groups corresponding to the target spectrum.
13. The network management device of claim 10,
the sending unit is used for informing the grouping result of the terminal equipment to the terminal equipment, wherein the grouping result is the group number of the group to which the terminal equipment belongs; or,
when the group to which the terminal device belongs can be uniquely identified by the sensing parameter, the sending unit informs the terminal device of a grouping result of the terminal device, and the grouping result is the sensing parameter uniquely identifying the group to which the terminal device belongs; or,
when a group terminal identification ID is allocated to each group and a sensing parameter of each group can be borne by a channel addressed by a corresponding group terminal ID or a channel scheduled by a group terminal ID addressing channel, when the sending unit notifies the grouping result of the terminal device to the terminal device, the grouping result is the group terminal ID of the group to which the terminal device belongs.
14. The network management device of claim 10,
the sending unit is further configured to send the corresponding relationship between the sensing parameter and the grouping result to the terminal devices in each group through a system broadcast message; or,
the sending unit is further configured to send the corresponding relationship between the sensing parameters and the grouping results to the terminal devices in each group through a sensing control message, where the sensing control message is a message carried on an assigned channel; or,
when the group terminal IDs are allocated to the groups and the sensing parameters of the groups can be borne by the channel addressed by the corresponding group terminal IDs or the channel scheduled by the group terminal ID addressing channel, the sending unit is further configured to send the sensing parameters corresponding to the groups to the terminal devices in the groups respectively through the channel addressed by the group terminal IDs or the channel scheduled by the group terminal ID addressing channel.
15. A terminal device, comprising:
the first receiving unit is used for receiving grouping results from the network management equipment, wherein the sensing parameters corresponding to each group are applicable to all terminal equipment in the group, and the sensing parameters refer to parameters for controlling cooperative spectrum sensing behaviors of the terminal equipment at the network side;
a second receiving unit, configured to receive, using the grouping result, a sensing parameter of a group to which the terminal device belongs;
and the perception parameter configuration unit is used for performing perception parameter configuration by using the perception parameters of the group to which the terminal equipment belongs.
16. The terminal device of claim 15, wherein the sensing parameters received by the second receiving unit include a target spectrum that the terminal device needs to sense.
17. The terminal device of claim 15,
the first receiving unit receives a grouping result from a network management device, wherein the grouping result is a group number of a group to which the terminal device belongs; or,
when the group to which the terminal device belongs can be uniquely identified by the sensing parameter, the first receiving unit receives a grouping result from the network management device, and the grouping result is the sensing parameter uniquely identifying the group to which the terminal device belongs; or,
when a group terminal identification ID is allocated to each group and a sensing parameter of each group can be carried by a channel addressed by a corresponding group terminal ID or a channel scheduled by a group terminal ID addressing channel, when the first receiving unit receives a grouping result from the network management device, the grouping result is the group terminal ID of the group to which the terminal device belongs.
18. The terminal device of claim 15,
the second receiving unit is specifically configured to receive a system broadcast message carrying a correspondence between a sensing parameter and a grouping result, and obtain the sensing parameter of a group to which the terminal device belongs by using the grouping result of the terminal device and the correspondence between the sensing parameter and the grouping result; or,
the second receiving unit is specifically configured to receive a sensing control message carrying a correspondence between sensing parameters and grouping results, and obtain the sensing parameters of a group to which the terminal device belongs by using the grouping results of the terminal device and the correspondence between the sensing parameters and the grouping results, where the sensing control message is a message carried on a specified channel; or,
when a group terminal ID is allocated to each group and a sensing parameter of each group can be carried by a channel addressed by a corresponding group terminal ID or a channel scheduled by a group terminal ID addressing channel, the second receiving unit is specifically configured to receive the sensing parameter corresponding to the group to which the terminal device belongs through the channel addressed by the group terminal ID corresponding to the group to which the terminal device belongs or the channel scheduled by the group terminal ID addressing channel corresponding to the group to which the terminal device belongs.
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| CN108116260B (en) * | 2017-12-22 | 2021-06-01 | 南京师范大学 | Parameter configuration method for equal-power multi-unit bidirectional wireless power transmission system |
| CN114079528B (en) * | 2020-08-12 | 2023-11-21 | 华为技术有限公司 | Sensing method and device thereof |
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| CN116155417A (en) * | 2021-11-23 | 2023-05-23 | 华为技术有限公司 | Spectrum sensing method and device, storage medium and program product |
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| CN102457856A (en) * | 2010-10-15 | 2012-05-16 | 电信科学技术研究院 | Method, device and system for realizing frequency point moving based on CR |
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