WO2014012453A1 - 一种感知系统中进行小区搜索的方法及装置 - Google Patents
一种感知系统中进行小区搜索的方法及装置 Download PDFInfo
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- WO2014012453A1 WO2014012453A1 PCT/CN2013/079176 CN2013079176W WO2014012453A1 WO 2014012453 A1 WO2014012453 A1 WO 2014012453A1 CN 2013079176 W CN2013079176 W CN 2013079176W WO 2014012453 A1 WO2014012453 A1 WO 2014012453A1
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- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000012545 processing Methods 0.000 claims description 12
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000012795 verification Methods 0.000 claims 1
- 238000013475 authorization Methods 0.000 abstract description 10
- 238000004891 communication Methods 0.000 abstract description 8
- 230000003467 diminishing effect Effects 0.000 abstract 2
- 230000008569 process Effects 0.000 description 12
- 238000001228 spectrum Methods 0.000 description 11
- 238000005259 measurement Methods 0.000 description 7
- 238000004590 computer program Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000001149 cognitive effect Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/02—Selection of wireless resources by user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Definitions
- the present application relates to the field of wireless communications, and in particular, to a method and apparatus for performing cell search in a sensing system.
- Radio communication frequency is a valuable natural resource.
- the spectrum allocation system adopted by the wireless communication network is a fixed spectrum allocation, which results in some systems with large traffic carrying capacity not allocating sufficient spectrum resources, and some systems with a small amount of service carrying are occupied. More spectrum resources make the fixed allocation of spectrum resources not fully utilized. In order to improve the utilization of spectrum resources, Cognitive Radio technology emerged.
- the basic idea of cognitive radio technology is: to dynamically monitor the changes of the current wireless communication environment and dynamically select the blank frequency of the authorization system to communicate, so as to solve the current fixed allocation of spectrum, without causing interference to the authorization system.
- the problem of unreasonable use of spectrum resources refers to the frequency point that has been allocated to the authorization system and is in an idle state.
- an access system capable of communicating using a radio communication spectrum allocated to an authorized system and in an idle state is referred to as a sensing system.
- the currently used mechanism is that the lower priority sensing system actively evades the higher priority sensing system, that is, when the higher priority sensing system uses a certain
- the lower priority sensing system may use the opportunity when the higher priority system does not use the white space frequency, or the lower priority system after the higher priority sensing system appears.
- the white frequency is generally dynamically variable, and the operating frequency of the sensing system changes accordingly, so that the access system at the frequency is also dynamically changed.
- the terminal needs to perform a cell search after the power is turned on. If the terminal stores a priori information (where the a priori information includes at least the frequency point information previously used by the terminal), the terminal preferentially performs a cell search on the frequency point in the a priori information. If a suitable cell is detected, the terminal selects the cell and camps; if there are multiple frequency points in the a priori information, the terminal first performs power measurement, and preferably the frequency with the highest power tries downlink synchronization and reads the broadcast. Operation such as channel; however, since the frequency used by the access system is dynamically changed, the access system at the frequency is also dynamically changed. Therefore, the frequency in the a priori information stored by the terminal is not necessarily allowed to be accessed by the terminal.
- the frequency at which the network can use, if not, the terminal will be wasted A large amount of time is performed for operations such as unnecessary downlink synchronization, thereby increasing the delay of cell selection and cell camping. If the terminal does not have a priori information, the terminal performs a full-band blind search within its supported bandwidth until a suitable cell is detected, resulting in a delay in cell selection and cell camping.
- the access system at the frequency point is also dynamically changed. If the terminal performs power scanning based on the stored a priori information, the frequency of the scanned maximum power is not necessarily the network that allows the terminal to access, thereby The terminal wastes a lot of time to perform operations such as unnecessary downlink synchronization, which increases the cell selection and the delay of the area and the area, and reduces the user experience.
- the embodiments of the present invention provide a method and a device for performing cell search in a sensing system, which are used to solve the problem that when a terminal performs cell search in an existing CR system, the frequency used by the access system is dynamically changed, which is easy to make The terminal wastes a lot of time to perform operations such as unnecessary downlink synchronization, cell selection, and delay of zone camping.
- the embodiment of the present application provides a method for performing cell search in a sensing system, including:
- the terminal determines different types of frequency points in the frequency points supported by the sensing system, wherein, according to the order of priority from high to low, the frequency points of the sensing system are classified into a first type of authorized frequency points and a first type of unlicensed frequency. Point, second type of authorized frequency point and second type of unlicensed frequency point;
- the terminal performs cell search and cell camping on a frequency point supported by the sensing system according to the order of priority from high to low;
- the second type of authorized frequency points includes an authorized frequency point other than the first type of authorized frequency points supported by the sensing system; the second type of unlicensed frequency points includes the sensing system. Unlicensed frequency points other than the first type of unlicensed frequency points in the supported unlicensed frequency points.
- An embodiment of the present application provides a device for performing cell search in a sensing system, including:
- a determining module configured to determine different types of frequency points in the frequency points supported by the sensing system, wherein, according to the order of priority from high to low, the frequency of the sensing system is divided into the first type of authorized frequency points, and the first Class unlicensed frequency, second authorized frequency and second unlicensed frequency;
- a processing module configured to perform cell search and cell camping on a frequency point supported by the sensing system according to the order of priority from high to low;
- the second type of authorized frequency points includes an authorized frequency point other than the first type of authorized frequency points supported by the sensing system; the second type of unlicensed frequency points includes the sensing system. Among the unlicensed frequencies supported, except the first Unlicensed frequency points other than the unlicensed frequency.
- the terminal determines different types of frequency points in the frequency points supported by the sensing system, and performs cell search and cell camping on the frequency points corresponding to the sensing system according to the order of priority from high to low, and optimizes cell selection.
- the mechanism can quickly and accurately select to camp in a suitable cell, thereby reducing the delay of performing cell selection and cell resident operation after the terminal is powered on, thereby improving the user experience.
- FIG. 1 is a flowchart of a method for performing cell search in a sensing system according to an embodiment of the present application;
- FIG. 2 is a flowchart of a method for performing cell search in a first sensing system according to an embodiment of the present application
- FIG. 3 is a flowchart of a method for performing cell search in a second sensing system according to an embodiment of the present application
- FIG. 4 is a flowchart of a method for performing cell search in a third sensing system according to an embodiment of the present application
- FIG. 5 is a schematic structural diagram of an apparatus for performing cell search in a sensing system according to an embodiment of the present application.
- the terminal determines different frequency points in the frequency points supported by the sensing system, and performs cell search and cell camping on the frequency point corresponding to the sensing system according to the order of priority from high to low.
- the cell selection mechanism is optimized so that a suitable cell can be quickly and accurately selected for camping.
- the frequency bands supported by the sensing system in the embodiment of the present application include a licensed frequency band and an unlicensed frequency point segment; wherein, the licensed frequency band refers to a frequency band specified by the protocol or policy, that is, a frequency band fixedly allocated to the sensing system; the unlicensed frequency band refers to an authorized frequency band. a frequency band or a frequency band not specified in a protocol or policy that is fixedly allocated and idle in the system;
- the authorized frequency point supported by the sensing system refers to the number of each fixed frequency contained in the licensed frequency band
- the unlicensed frequency point refers to the number of each fixed frequency included in the unlicensed frequency band.
- the authorized frequency and unlicensed frequency points supported by the sensing system are known to the terminal.
- the frequency points supported by the sensing system are prioritized.
- the order of high to low is divided into a first type of authorized frequency point, a first type of unlicensed frequency point, a second type of authorized frequency point, and a second type of unlicensed frequency point, wherein the second type of authorized frequency point includes the sensing system
- the authorized frequency points of the supported authorized frequency points other than the first type of authorized frequency points; the second type of unlicensed frequency points includes the unlicensed frequency points supported by the sensing system except the first type of unlicensed frequency points. Unauthorized frequency.
- a method for performing cell search in a sensing system includes the following steps: Step 11.
- the terminal determines different types of frequency points in the frequency points supported by the sensing system.
- Step 12 The terminal performs cell search and cell camping at a frequency point supported by the sensing system according to a priority from high to low.
- step 11 the terminal determines that the first type of authorized frequency points and the first type of non-authorized frequency points among the frequency points supported by the sensing system include one or a combination of the following manners:
- Method A The terminal determines the first type of authorized frequency point and the first type of unlicensed frequency point according to the frequency point information in the a priori information stored by the terminal;
- the terminal determines the first type of authorized frequency point and the first type of unlicensed frequency point according to the frequency of the authorized frequency currently used by the cell where the terminal is stored in the database and/or the frequency of the unlicensed frequency point; wherein, the frequency point
- the information includes but is not limited to the following types of information: frequency type (such as authorized frequency, unlicensed frequency), effective time limit of frequency, cell ID using the frequency, corresponding alternate frequency, working frequency
- frequency type such as authorized frequency, unlicensed frequency
- effective time limit of frequency cell ID using the frequency, corresponding alternate frequency
- working frequency A radio access technology that may be carried, the specific format of the frequency information may be as shown in Table 1. Only the frequency information of the frequency point fl is given in Table 1.
- the terminal may select different manners according to actual conditions to determine the first type of authorized frequency points and the first type of unlicensed frequency points;
- the terminal preferentially selects a method to determine a first type of authorized frequency point and a first type of unlicensed frequency point; for example, if the terminal does not have a priori information, the terminal preferentially selects mode B to Determine the first type of authorized frequency and the first type of unlicensed frequency; for example, if the location is different from the current location when the terminal is turned off (such as Shanghai before the terminal is shut down, it is located in Beijing at the time of power-on), regardless of the terminal Whether there is a priori information, the terminal prefers mode B to determine the first type of authorized frequency and the first type of unlicensed frequency.
- the terminal determines the first type of authorized frequency point and the first type of unlicensed frequency in the frequency point supported by the sensing system. Points include the following steps:
- the terminal uses all the authorized frequency points included in the a priori information as the first type of authorized frequency points;
- the terminal synchronizes to the common control channel of the cell that uses the first type of authorized frequency, and acquires the frequency information corresponding to the neighboring cell.
- the common control channel may be a common channel capable of realizing the transmission of the cell frequency information, such as a broadcast channel.
- the public control channel may be specified by agreement or agreed by both parties;
- the terminal determines the first type of unlicensed frequency points according to the valid time limit information of the unlicensed frequency points in the obtained frequency point information. It should be noted that mode A1 is particularly applicable to scenarios in which a priori information only contains frequency point information of authorized frequency points. However, for the scenario where the prior information contains both the frequency information of the authorized frequency point and the frequency point information of the unlicensed frequency point, the mode A1 is also applicable.
- the authorized frequency point is used as the first type of authorized frequency point, and is attempted to be synchronized to the common control channel of the cell using the first type of authorized frequency point to obtain The parameter information required for the dwelling judgment corresponding to the cell and the frequency information of the neighboring 'J, the area used, etc.;
- the terminal first attempts to synchronize to the common control channel of the cell with the highest signal strength. If the synchronization is successful, the terminal reads the common control channel. The parameter information corresponding to the cell and the frequency information of the neighboring cell (including the unlicensed frequency used by the neighboring cell and its corresponding alternate frequency point); if the synchronization fails, the terminal attempts to synchronize to the common control channel of the cell with the second highest signal strength. Up, and so on, if the terminal fails to synchronize at the first type of authorized frequency, the terminal selects mode B to determine the first type of authorized frequency point and the first type of unlicensed frequency point.
- the a priori information includes multiple authorized frequency points
- the multiple authorized frequency points are used as the first type of authorized frequency points, and the first attempt is made to synchronize to the cell of the first type of authorized frequency point with the best channel shield quantity.
- the common control channel to obtain parameter information required for the resident judgment corresponding to the cell, and the neighboring point, the frequency information used by the area, and the like;
- the terminal first attempts to synchronize to the common control channel of the cell with the strongest signal strength. If the synchronization is successful, the terminal reads through the common control channel. The parameter information corresponding to the cell and the frequency information of the neighboring cell (including the unlicensed frequency point used by the neighboring cell and its corresponding alternate frequency point); if the synchronization fails, the terminal attempts to synchronize to the common control of the cell with the second highest signal strength. On the channel, and so on;
- the terminal attempts to synchronize to the common control channel of the cell of the first type of authorized frequency point with the channel shield suboptimal, and so on; If the terminal fails to synchronize at all the first type of authorized frequency points, the terminal selects mode B to determine the first type of authorized frequency points and the first type of unlicensed frequency points.
- the terminal determines, according to the valid time limit information of the unlicensed frequency points in the obtained frequency point information, that the first type of unlicensed frequency points includes:
- the terminal does not use the unlicensed frequency point that does not exceed the valid time limit in the obtained frequency point information as the first type of unlicensed frequency point; the terminal takes the spare frequency point corresponding to the unlicensed frequency point exceeding the valid time limit in the obtained frequency point information as the first Class unlicensed frequency; and
- the terminal will not obtain the unlicensed frequency point of the valid time limit information and its corresponding alternate frequency point as the first type of unlicensed frequency point.
- Method A2 If the terminal has a priori information, and the a priori information only includes the frequency information of the unlicensed frequency point, then the terminal information
- the first type of authorized frequency points and the first type of unlicensed frequency points in the frequency points supported by the sensing system include: the terminal determines that the frequency points supported by the sensing system do not include the first type of authorized frequency points;
- the terminal determines the first type of unlicensed frequency points according to the effective time limit information of the unlicensed frequency points in the frequency information included in the a priori information. For the specific determining manner, refer to the description in the method A1.
- Method A3 If the terminal has a priori information, and the a priori information includes the frequency information of the authorized frequency point and the frequency point information of the unlicensed frequency point, the terminal determines the first type of authorized frequency in the frequency point supported by the sensing system. Points and the first type of unlicensed frequency points include:
- the terminal uses all the authorized frequency points included in the a priori information as the first type of authorized frequency points;
- the terminal determines the first type of unlicensed frequency points according to the effective time limit information of the unlicensed frequency points in the frequency information included in the a priori information. For the specific determining manner, refer to the description in the method A1.
- the terminal uses the mode B to determine the first type of authorized frequency points and the first type of unlicensed frequency points in the frequency points supported by the sensing system, including:
- the terminal establishes a connection with the system to which the database belongs through a preset channel, wherein the preset channel connected to the system to which the terminal belongs may be specified by a protocol or a policy to ensure that a fixed frequency band exists in a certain area to provide the access.
- the terminal sends an access request for querying the authorized frequency point and the unlicensed frequency point to the system to which the database belongs, where the access request includes the attribute information of the terminal and the frequency point information obtaining request;
- the terminal determines the first type of authorized frequency point and the first type of unlicensed frequency point according to the received frequency point information.
- the terminal sends an access request for querying the authorized frequency point and the unlicensed frequency point to the system to which the database belongs, which may be that the terminal sends an authorization frequency point for querying the current location of the cell where the terminal is located to the system to which the database belongs. Or an access request that is not authorized.
- the database may be established and maintained by the authorization system, or may be established and maintained by the sensing system itself, and may be established and maintained by a third party;
- the database can also provide bandwidth information, cell ID, synchronization sequence information used by the synchronization channel, etc., but for the database, the frequency information must be provided.
- the terminal determines, according to the frequency information provided by the database, the first type of authorized frequency points and the first type of unlicensed frequency points, including:
- the terminal uses all the authorized frequency points included in the frequency point information as the first type of authorized frequency points;
- the terminal will determine the first type of unlicensed frequency according to the effective time limit information of the unlicensed frequency in the frequency information. For the specific determination method, refer to the description in mode A1.
- the premise that the terminal determines the first type of authorized frequency points and the first type of unlicensed frequency points according to the frequency information provided by the database is that the frequency information provided by the database includes the frequency of the authorized frequency points. Point information also includes frequency information of unlicensed frequency points. If the frequency information provided by the database is only the frequency information of the authorized frequency, or For the frequency information of the unlicensed frequency, the specific determination method can be referred to the description in the mode A1.
- the terminal After determining the first type of authorized frequency and the first type of unlicensed frequency, the terminal further includes:
- the other authorized frequency points other than the first type of authorized frequency points among the authorized frequency points supported by the sensing system are used as the second type of authorized frequency points;
- the unlicensed frequency points other than the first type of unlicensed frequency points among the unlicensed frequency points supported by the sensing system are used as the second type of unlicensed frequency points.
- the terminal type A and mode B do not determine the first type of authorized frequency point, it is determined that the frequency point supported by the sensing system does not include the first type of authorized frequency point; and the sensing system is All authorized frequency points in the supported frequency points are used as the second type of authorized frequency points;
- the terminal type A and mode B do not determine the first type of unlicensed frequency points, it is determined that the frequency points supported by the sensing system do not include the first type of unlicensed frequency points; and the frequency supported by the sensing system is used. All unlicensed frequency points in the point are used as the second type of unlicensed frequency points.
- step 12 the terminal performs cell search and cell camping on the frequency point corresponding to the sensing system according to the order of priority from high to low, including:
- the terminal performs cell search and cell camping on the first type of authorized frequency of the sensing system, and after camping on the appropriate cell, camps on the cell;
- the terminal If no suitable cell is detected to be camped on the first type of authorized frequency, the terminal performs cell search and cell camping on the first type of unlicensed frequency of the sensing system. After detecting the appropriate cell, Residing in the cell; if no suitable cell is detected to be camped on the first non-class authorized frequency point, the terminal performs cell search and cell camping on the second type of authorized frequency of the sensing system, and detects After the appropriate cell is camped on the cell; if the terminal does not detect a suitable cell to camp on the second type of authorized frequency, the cell search is performed on the second type of unlicensed frequency of the sensing system.
- the cell camps, after detecting the appropriate cell, camps on the cell; if no suitable cell is detected to camp on the second type of unlicensed frequency, the terminal stops performing cell search, and is set in the After the duration, the above steps are repeated, that is, the cell search and the cell camping are performed again on the frequency point corresponding to the sensing system according to the order of priority from high to low.
- the terminal supports multiple wireless access modes, other access modes may be tried to access the sensing system, and the specific process is the same as above.
- the terminal performs cell search and cell camping on the first type of authorized frequency points, including: the terminal according to the order of the channel shield from high to low, in the corresponding Cell search and cell resident on the first type of authorized frequency;
- the terminal performs cell search and cell camping on the first type of unlicensed frequency points, including: the terminal according to the order of the channel shield from high to low, in the corresponding Cell search and cell camping on the first type of unlicensed frequency points; If the determined number of the second type of authorized frequency points is multiple, the terminal performs ' ⁇ , area search, and cell camping on the second type of authorized frequency points, including: the terminal according to the order of the channel shield from high to low, corresponding to Cell search and cell camping on the second type of authorized frequency;
- the terminal performs ' ⁇ , area search, and cell camping on the second type of unlicensed frequency points, including: the terminal according to the order of the channel shield from high to low, Cell search and cell camping are performed on the corresponding second type of unlicensed frequency points.
- the process of performing cell selection by the terminal includes:
- NAS Non-Access Stratum
- RRC Radio Resource Control
- the RRC layer notifies the physical layer (PHY) to perform reference signal reception power ( Reference Signal
- RSRP Received Power
- MAC Medium Access Control
- the PHY reports the RSRP measurement value and the corresponding cell information to the RRC layer.
- the RRC layer performs sorting according to the RSRP measurement value, and requests the PHY to synchronize to the cell with the largest RSRP measurement value (ie, the cell with the strongest signal);
- the broadcast information is received through the broadcast channel of the cell, and the broadcast information is reported to the RRC;
- the RRC determines whether the cell is a Public Land Mobile Network (PLMN) cell defined by the NAS according to the content of the broadcast information and the RSRP measurement value of the cell; if yes, the S criterion (ie, the resident condition judgment) is determined. ;
- PLMN Public Land Mobile Network
- the cell If the cell satisfies the camping condition (ie, S>0), camps on the cell and enters the IDLE state;
- the terminal is notified to synchronize to the cell with the strongest signal.
- the terminal performs the judgment of the cell camping condition according to the formula 1;
- ⁇ / indicates the cell selection S value
- ⁇ indicates the received reference signal power value
- ⁇ ⁇ indicates the minimum power value of the received signal
- ⁇ fevmin 5ef indicates that the high priority is periodically selected when camping under the VPLMN
- P compe ⁇ tlon ma ⁇ PEMAX _ P UMAX ⁇
- PEMAX represents the maximum transmit power of the terminal for uplink transmission
- PUMAX represents the maximum RF output power of the terminal
- Embodiment 1 is a diagrammatic representation of Embodiment 1:
- the unlicensed frequency points corresponding to the CA system include fl, £2, ⁇ , f4 and f5, and the authorized frequency points include f6, f7 and ffi, and the TD-LTE cell with the carrier frequency point f6 working in the CA system before the terminal is shut down And the terminal stores the frequency point information of the frequency point f6.
- the process of performing cell search and cell camping by the terminal includes the following steps:
- Step 201 The terminal measures the signal strength value of each cell corresponding to f6, and attempts to synchronize to the common control channel of the cell with the largest signal strength value (this embodiment uses a broadcast channel as an example for description);
- the broadcast channel information is read to obtain the parameter information required to determine the camping of the cell and the unlicensed frequency used by the cell and its neighbors and the area, and step 202 is performed;
- the unlicensed frequency points are fl , ⁇ ;
- step 204 is performed.
- Step 202 The terminal determines, according to the obtained parameter value of the cell with the frequency point f6, the cell selection S value (ie, the value) obtained according to the S criterion (ie, formula 1), whether the cell satisfies the resident condition.
- step 203 is performed;
- step 204 is performed;
- Step 203 The terminal camps on the cell.
- Step 204 The terminal measures the channel shield of the unlicensed frequency points fl and ⁇ , and selects the frequency point with the best channel shield quantity for synchronization;
- the first attempt is made to synchronize to the broadcast channel on fl. If the synchronization is successful, the parameter information required to determine the cell camping is obtained through the broadcast channel of fl, and according to the formula. (1) determining whether the cell whose frequency is fl meets the camping condition, and the determining process is similar to the determining whether the cell having the frequency f6 meets the camping condition in step 202, and details are not described herein;
- Step 205 If the terminal fails to synchronize to the broadcast channel of fl and the broadcast channel of ⁇ , or the cell whose frequency is fl and ⁇ does not satisfy the camping condition, the terminal measures the authorized frequency f7 without a priori information and Ffi's channel shield quantity, and select the frequency point with the best channel shield for synchronization;
- the first attempt is made to synchronize to the broadcast channel of f7. If the synchronization is successful, the parameter information required for judging the cell camping is obtained, and it is determined whether the camping condition is satisfied; Meet the dwelling conditions, Then camp on the cell with the frequency point f7;
- the synchronization fails or does not meet the camping condition, it attempts to synchronize to the broadcast channel of f8, and performs the same judgment process. Once the camping condition is met, it camps on the cell with the frequency point f8;
- Step 206 If the terminal fails to synchronize to the broadcast channel of the ⁇ and the broadcast channel, or the cell whose frequency points ⁇ and ⁇ do not satisfy the camping condition, the terminal measures the unlicensed frequency point without the a priori information. , f4 and f5 channel shields, and select the frequency with the best channel shield for synchronization;
- the channel shield of £ is better than the channel shield of f4, and the channel shield of f4 is better than the channel shield of f5, then try to synchronize to the broadcast channel of £2, if the synchronization is successful, obtain the judgment cell resident.
- the required parameter information and judge whether the camping condition is met; if the camping condition is met, camp on the cell with the frequency point of £2;
- the synchronization fails or does not satisfy the camping condition, it attempts to synchronize to the broadcast channel of f4, and performs the same judgment process, and once the camping condition is met, camps on the cell with frequency f4;
- the synchronization fails or does not meet the camping condition, it attempts to synchronize to the broadcast channel of f5, and performs a corresponding judgment process, and once the camping condition is met, camps on the cell with frequency f5;
- Step 207 If the terminal fails to synchronize to the broadcast channels of £2, f4, and f5, or the cells whose frequency points are £2, f4, and f5 do not satisfy the camping condition, that is, the terminal does not search for a suitable cell to camp. If the terminal waits for a set period of time, the terminal re-initiates steps 201 to 206.
- step 207 if the terminal supports multiple radio access modes at the same time, the terminal attempts to access by using other access modes, and the specific procedure is similar to the foregoing steps 201 to 206, and details are not described herein again.
- Embodiment 2 is a diagrammatic representation of Embodiment 1:
- the unlicensed frequency points corresponding to the CA system include fl, £2, ⁇ , f4 and f5
- the authorized frequency points include f6, f7 and f8, and the TD-LTE cell with the carrier frequency point f6 working in the CA system before the terminal is shut down
- the terminal stores the frequency point information of the frequency point f6, and the specified channel of the access database is carried on the carrier.
- the process of performing cell search and cell camping by the terminal includes the following steps:
- Step 300 The terminal sends an access request to the database server by using a channel corresponding to the carrier, to obtain frequency point information.
- the access request includes the information of the terminal itself and the request to obtain the usage of the unlicensed frequency in the area where the terminal is located and the neighboring area.
- the information of the terminal itself includes the geographic location of the terminal, the wireless access mode supported by the terminal, and the terminal. RF capabilities, etc.;
- the database server notifies the authorized frequency of the area where the terminal is located to include f6, the unlicensed frequency points include fl and ⁇ , and the radio access technology carried by each frequency point is TD-LTE, and other information of each frequency point. For example, the cell ID corresponding to the frequency point, synchronization information, and the like;
- Step 301 The terminal measures the signal strength value of each cell corresponding to the measurement f6, and attempts to synchronize to the signal strength value.
- a common control channel of a large cell this embodiment uses a broadcast channel as an example for description);
- the broadcast channel information is read to obtain the parameter information required to determine the camping of the cell, and step 302 is performed;
- step 304 If the synchronization fails, go to step 304.
- Step 302 to step 307 are the same as steps 202 to 207, and are not described herein again.
- Embodiment 3 is a diagrammatic representation of Embodiment 3
- the unlicensed frequency points corresponding to the CA system include fl£ ⁇ f4 and f5
- the authorized frequency points include f6 f7 and ffi
- the frequency point information of the authorized frequency point and the frequency point information of the unlicensed frequency point are obtained through the broadcast channel or measurement, and stored.
- the process of performing cell search and cell camping by the terminal includes the following steps:
- Step 400 The terminal determines the first type of authorized frequency point and the first type of unlicensed frequency point by using the stored frequency point information; assuming that the frequency point information stored by the terminal is as shown in Table 2, it can be known that the first type of authorized frequency point is f6; For the unlicensed frequency point f5, since f5 has exceeded its effective time limit, the alternate frequency point fl corresponding to f5 is used as the first type of unlicensed frequency point; for the unlicensed frequency point ⁇ , since ⁇ does not exceed its effective time limit, As the first type of unlicensed frequency point; for the unlicensed frequency point £2, since the information of the valid time limit cannot be known, it is impossible to judge whether the £2 expires, so the £2 and its corresponding alternate frequency point f4 are also As the first type of unlicensed frequency point;
- Step 401 The terminal measures the signal strength value of each cell corresponding to f6, and attempts to synchronize to the common control channel of the cell with the largest signal strength value (this embodiment uses a broadcast channel as an example for description);
- the broadcast channel information is read to obtain the parameter information required to determine the camping of the cell, and step 402 is performed;
- step 404 is performed.
- Steps 402 to 407 are similar to steps 202 to 207, and are not described herein again.
- the embodiment of the present application further provides a device for performing cell search in a sensing system. Since the principle of solving the problem is similar to the method for performing cell search in the sensing system, the implementation of the device may be referred to. The implementation of the method, the repetition will not be repeated.
- an apparatus for performing cell search in a sensing system includes:
- the determining module 51 is configured to determine different types of frequency points in the frequency points supported by the sensing system, wherein, according to the order of priority from high to low, the frequency of the sensing system is divided into the first type of authorized frequency points, and the first type Unlicensed frequency, second authorized frequency and second unlicensed frequency;
- the processing module 52 is configured to perform cell search and cell camping on a frequency point supported by the sensing system according to a priority from highest to lowest;
- the second type of authorized frequency includes the authorized frequency points other than the first type of authorized frequency points supported by the sensing system; the second type of unlicensed frequency points includes the unlicensed frequency points supported by the sensing system. Unlicensed frequency points other than the first type of unlicensed frequency.
- the determining module 51 is specifically configured to:
- the authorized frequency point of the authorized frequency of the sensing system except the first type of authorized frequency point is used as the second type of authorized frequency point; the authorization of the unlicensed frequency point of the sensing system other than the first type of unlicensed frequency point is authorized The frequency point is used as the second type of unlicensed frequency point.
- the determining module 51 is specifically configured to:
- the first type of authorized frequency point and the first type of unlicensed frequency point are determined according to the frequency information of the authorized frequency point and/or the unlicensed frequency point currently used by the cell in which the device is located in the database.
- the determining module 51 is specifically configured to:
- the device When the device has a priori information, and the a priori information includes the frequency information of the authorized frequency point, all the authorized frequency points included in the a priori information are used as the first type of authorized frequency point; synchronization to use the first type of authorized frequency point On the common control channel of the cell, and acquiring frequency point information corresponding to the neighboring cell; and valid time limit information of the unlicensed frequency point in the obtained frequency point information Information, determine the first type of unlicensed frequency.
- the determining module 51 may specifically be used for:
- the device When the device has a priori information, and the a priori information only includes the frequency information of the unlicensed frequency, it is determined that the frequency point supported by the sensing system does not include the first type of authorized frequency point; and the non-authorized according to the frequency information
- the effective time limit information of the frequency point determines the first type of unlicensed frequency points.
- the determining module 51 may specifically be used for:
- the a priori information includes the frequency point information of the authorized frequency point and the frequency point information of the unlicensed frequency point
- all the authorized frequency points in the a priori information are used as the first type of authorized frequency point
- the effective time limit information of the unlicensed frequency points in the frequency information determines the first type of unlicensed frequency points.
- the determining module 51 is specifically configured to: when the number of cells using the first type of authorized frequency points is multiple, synchronize according to the order of signal strength from large to small Try to synchronize to the common control channel of the corresponding cell.
- the determining module 51 is specifically configured to:
- the access request includes attribute information of the device and a frequency point information acquisition request.
- the determining module 51 is specifically configured to:
- the access request includes attribute information of the device, and a frequency point information acquisition request.
- the determining module 51 is specifically configured to:
- the authorized frequency point in the frequency point information is used as the first type of authorized frequency point; and the first type of unlicensed frequency point is determined according to the effective time limit information of the unlicensed frequency point in the frequency point information.
- the determining module 51 is specifically configured to:
- the unlicensed frequency point in the frequency point information that does not exceed the valid time limit is used as the first type of unlicensed frequency point; the alternate frequency point corresponding to the unlicensed frequency point exceeding the effective time limit in the frequency point information is used as the first type of unlicensed frequency point; And the unlicensed frequency point and the corresponding alternate frequency point that cannot obtain the valid time limit information are used as the first type of unlicensed frequency points.
- the processing module 52 is specifically configured to:
- the cell search and the cell camping are performed on the corresponding first type of authorized frequency points according to the order of the channel shields from high to low;
- the cell search and the cell camping are performed on the corresponding second type of authorized frequency points according to the order of the channel shields from high to low;
- the cell search and the cell camping are performed on the corresponding second type of unlicensed frequency points in the order of the channel shield quantity from high to low.
- the processing module 52 is further configured to:
- the cell search is stopped; and after the set duration, Cell search and cell camping are performed again at the frequency point corresponding to the sensing system according to the order of priority from high to low.
- the apparatus for performing cell search in the sensing system provided by the embodiment of the present invention may be, but is not limited to, the terminal in the foregoing method embodiment.
- embodiments of the present application can be provided as a method, system, or computer program product.
- the application can be in the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
- the application can be in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
- the terminal determines the first type of authorized frequency points and the first type of unlicensed frequency points in the frequency points supported by the sensing system, and performs the cell at the frequency point corresponding to the sensing system according to the order of priority from high to low.
- the search and cell camping optimizes the cell selection mechanism, so that the cell can be quickly and accurately selected for camping, thereby reducing the delay of cell selection and cell camping operation after the terminal is powered on, and improving the user experience.
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Abstract
本申请实施例涉及无线通信领域,特别涉及一种感知系统中进行小区搜索的方法及装置,用于解决现有技术中在进行小区选择及小区驻留时存在操作时延长的问题。本申请实施例的方法包括:终端确定感知系统所支持的频点中不同种类的频点,其中,按照优先级从高到低的顺序,感知系统的频点分为第一类授权频点、第一类非授权频点、第二类授权频点及第二类非授权频点;以及按照优先级从高到低的顺序,在感知系统所支持的频点上进行小区搜索及小区驻留。本申请能够快速准确地选择到合适的小区进行驻留,从而减少了终端开机后进行小区选择及小区驻留操作的时延,提高了用户体验。
Description
一种感知系统中进行小区搜索的方法及装置 本申请要求在 2012年 7月 17日提交中国专利局、 申请号为 201210248186.3、 发明名称为
"一种感知系统中进行' j、区搜索的方法及装置"的中国专利申请的优先权,其全部内容通过引用 结合在本申请中。 技术领域 本申请涉及无线通信领域, 特别涉及一种感知系统中进行小区搜索的方法及装置。 背景技术 无线电通信频语是一种宝贵的自然资源, 随着无线通信技术的飞快发展, 频谱资源贫 乏的问题日益严重。 目前, 无线通信网络所釆用的频谱分配制度为固定频谱分配, 从而导 致了有些业务承载量很大的系统没有分配到足够的频谱资源, 而有些业务承载量不是很大 的系统却占用了过多的频谱资源, 使固定分配的频谱资源得不到充分的利用。 为了提高频 谱资源的利用率, 认知无线电 ( Cognitive Radio )技术应运而生。
认知无线电技术的基本思想是: 在不对授权系统造成千扰的前提下, 通过智能化监测 当前无线通信环境的变化, 动态选择授权系统的空白频点进行通信, 以解决目前因频谱固 定分配导致的对频谱资源的不合理利用问题。 其中, 空白频点是指已分配给该授权系统且 处于空闲状态的频点。 基于认知无线电技术, 能够利用分配给授权系统且处于空闲状态的 无线电通信频谱进行通信的接入系统, 称为感知系统。
由于空白频点可能被多个感知系统发现并使用, 目前常釆用的机制为, 较低优先级的 感知系统主动避让较高优先级的感知系统, 即当较高优先级的感知系统使用某个空白频点 通信时, 较低优先级的感知系统可在该较高优先级系统不使用该空白频点时机会使用, 或 者在较高优先级的感知系统出现后, 较低优先级的系统要进行频谱资源避让。 由此可知, 空白频点一般是动态可变的, 感知系统的工作频点也会随之变化, 从而频点上的接入系统 也是动态变化的。
终端在开机后需要进行小区搜索, 如果终端存储有先验信息 (其中, 先验信息至少包 括该终端先前使用的频点信息), 则终端优先对先验信息中的频点进行小区搜索, 若检测 到合适的小区, 则终端会选择该小区并进行驻留; 若先验信息中的频点为多个, 则终端首 先会进行功率测量, 优选功率最大的频点尝试下行同步及读取广播信道等操作; 但由于接 入系统使用的频点是动态变化的, 频点上的接入系统也是动态变化的, 因此, 终端存储的 先验信息中的频点未必为允许该终端接入的网络能够使用的频点, 若不是, 则终端将浪费
大量的时间进行没有必要的下行同步等操作, 从而增加了小区选择及小区驻留的时延。 如 果终端没有先验信息, 则终端会在其支持的带宽内进行全频段盲搜, 直至检测到合适的小 区, 造成了小区选择及小区驻留的时延。
在 CR系统中, 频点上的接入系统也是动态变化的, 若终端基于存储的先验信息进行 功率扫描, 但扫描到的最大功率的频点未必为允许该终端接入的网络, 从而使终端浪费了 大量的时间进行没有必要的下行同步等操作 , 增加了小区选择及'〗、区驻留的时延, 降低了 用户体验。
综上所述, 现有 CR系统中终端进行小区搜索时, 由于接入系统使用的频点是动态变化 的, 容易使终端浪费大量的时间进行没有必要的下行同步等操作 , 增加了小区选择及小区 驻留的时延, 降低了用户体验。 发明内容 本申请实施例提供了一种感知系统中进行小区搜索的方法及装置, 用于解决现有 CR 系统中终端进行小区搜索时, 由于接入系统使用的频点是动态变化的, 容易使终端浪费大 量的时间进行没有必要的下行同步等操作, 小区选择及 、区驻留的时延增加的问题。
本申请实施例提供了一种感知系统中进行小区搜索的方法, 包括:
终端确定感知系统所支持的频点中不同种类的频点, 其中, 按照优先级从高到低的顺 序, 所述感知系统的频点分为第一类授权频点、 第一类非授权频点、 第二类授权频点及第 二类非授权频点;
所述终端按照所述优先级从高到低的顺序, 在所述感知系统所支持的频点上进行小区 搜索及小区驻留;
其中, 所述第二类授权频点包括所述感知系统所支持的授权频点中除第一类授权频点 之外的授权频点; 所述第二类非授权频点包括所述感知系统所支持的非授权频点中除第一 类非授权频点之外的非授权频点。
本申请实施例提供了一种感知系统中进行小区搜索的装置, 包括:
确定模块, 用于确定感知系统所支持的频点中不同种类的频点, 其中, 按照优先级从 高到低的顺序, 所述感知系统的频点分为第一类授权频点、 第一类非授权频点、 第二类授 权频点及第二类非授权频点;
处理模块, 用于按照所述优先级从高到低的顺序, 在所述感知系统所支持的频点上进 行小区搜索及小区驻留;
其中, 所述第二类授权频点包括所述感知系统所支持的授权频点中除第一类授权频点 之外的授权频点; 所述第二类非授权频点包括所述感知系统所支持的非授权频点中除第一
类非授权频点之外的非授权频点。
本申请实施例终端确定感知系统所支持频点中不同种类的频点, 并按照优先级从高到 低的顺序, 在感知系统对应的频点上进行小区搜索及小区驻留, 优化了小区选择机制, 从 而能够快速准确地选择到合适的小区进行驻留, 从而减少了终端开机后进行小区选择及小 区驻留操作的时延, 提高了用户体验。 附图说明 图 1为本申请实施例感知系统中进行小区搜索的方法流程图;
图 2为本申请实施例第一种感知系统中进行小区搜索的方法的流程图;
图 3为本申请实施例第二种感知系统中进行小区搜索的方法的流程图;
图 4为本申请实施例第三种感知系统中进行小区搜索的方法的流程图;
图 5为本申请实施例感知系统中进行小区搜索的装置的结构示意图。 具体实施方式 本申请实施例终端确定感知系统所支持的频点中不同种类的频点, 并按照优先级从高 到低的顺序, 在感知系统对应的频点上进行小区搜索及小区驻留, 优化了小区选择机制, 从而能够快速准确地选择到合适的小区进行驻留。
在对本申请各个实施例进行描述之前, 首先对本申请实施例中涉及到的一些技术特征 进行说明。
本申请实施例感知系统支持的频段包括授权频段和非授权频点段; 其中, 授权频段是 指协议规定或政策规定的频段, 即固定分配给该感知系统的频段; 非授权频段是指为授权 系统固定分配且处于空闲状态的频段或协议或政策中未规定的频段;
感知系统所支持的授权频点是指其授权频段中包含的各固定频率的编号, 非授权频点 是指其非授权频段中包含的各固定频率的编号。
感知系统所支持的授权频点与非授权频点对于终端是已知的, 终端在该感知系统中进 行小区搜索及小区驻留的过程中, 将该感知系统所支持的频点按照优先级从高到低的顺序 分为第一类授权频点、 第一类非授权频点、 第二类授权频点及第二类非授权频点, 其中, 第二类授权频点包括该感知系统所支持的授权频点中除第一类授权频点之外的授权频点; 第二类非授权频点包括该感知系统所支持的非授权频点中除第一类非授权频点之外的非 授权频点。
下面结合说明书附图对本申请实施例作进一步详细描述。
参见图 1 , 本申请实施例感知系统中进行小区搜索的方法, 包括以下步骤:
步骤 11、 终端确定感知系统所支持的频点中不同种类的频点;
步骤 12、 终端按照优先级从高到低的顺序, 在该感知系统所支持的频点上进行小区搜 索及小区驻留。
进一步,步骤 11中终端确定感知系统所支持的频点中的第一类授权频点及第一类非授 权频点包括下列方式中的一种或组合:
方式 A、 终端根据自身存储的先验信息中的频点信息, 确定第一类授权频点及第一类 非授权频点;
方式 B、终端根据数据库中存储的终端所在小区当前使用的授权频点和 /或非授权频点 的频点信息, 确定第一类授权频点及第一类非授权频点; 其中, 频点信息中包括但不限于 以下各种信息: 频点类型 (如授权频点、 非授权频点)、 频点的有效时限、 使用该频点的 小区 ID、 对应的备用频点、 工作频点下一个可能承载的无线接入技术, 该频点信息的具体 格式可以如表 1所示, 表 1中仅给出了频点 fl的频点信息。
表 1 需要说明的是, 终端可以根据实际情况选择不同的方式以确定第一类授权频点及第一 类非授权频点;
例如, 若终端具有先验信息, 则终端优先选择方式 Α以确定第一类授权频点及第一类 非授权频点; 又如, 若终端不具有先验信息, 则终端优先选择方式 B以确定第一类授权频 点及第一类非授权频点; 再如, 若终端关机前与本次开机时的地理位置不同 (如终端关机 前位于上海, 本次开机时位于北京), 无论终端是否具有先验信息, 终端都优先选择方式 B 以确定第一类授权频点及第一类非授权频点。
针对方式 A, 进一步包括以下三种方式:
方式 Al、若终端具有先验信息, 且该先验信息中包含授权频点的频点信息, 则终端确 定感知系统所支持的频点中的第一类授权频点及第一类非授权频点包括以下步骤:
终端将先验信息中包含的所有授权频点作为第一类授权频点;
终端同步到使用第一类授权频点的小区的公共控制信道上, 并获取邻小区对应的频点 信息;其中,公共控制信道可以为广播信道等能够实现进行小区频点信息传输的公共信道,
该公共控制信道可由协议规定或双方协定;
终端根据获取的频点信息中非授权频点的有效时限信息, 确定第一类非授权频点。 应当指出的是, 方式 A1尤其适用于先验信息中仅包含授权频点的频点信息的场景。 但对于先验信息中既包含授权频点的频点信息也包含非授权频点的频点信息的场景, 方式 A1同样适用。
进一步, 若先验信息中仅包括一个授权频点, 则将该授权频点作为第一类授权频点, 并尝试同步到使用该第一类授权频点的小区的公共控制信道上, 以获取该小区对应的驻留 判断时所需的参数信息以及邻 'J、区使用的频点信息等;
进一步, 若使用该第一类授权频点的小区的数量为多个, 则终端首先尝试同步到信号 强度最大的小区的公共控制信道上, 若同步成功, 则终端通过该公共控制信道读取该小区 对应的参数信息以及邻小区的频点信息(包括邻小区使用的非授权频点及其对应的备用频 点); 若同步失败, 则终端尝试同步到信号强度次大的小区的公共控制信道上, 依次类推, 若终端在该第一类授权频点上都同步失败, 则终端选择方式 B以确定第一类授权频点及第 一类非授权频点。
进一步, 若先验信息中包括多个授权频点, 则将该多个授权频点都作为第一类授权频 点, 并首先尝试同步到信道盾量最优的第一类授权频点的小区的公共控制信道上, 以获取 该小区对应的驻留判断时所需的参数信息以及邻 'J、区使用的频点信息等;
进一步, 若使用每个第一类授权频点的小区的数量为多个, 则终端首先尝试同步到信 号强度最大的小区的公共控制信道上, 若同步成功, 则终端通过该公共控制信道读取该小 区对应的参数信息以及邻小区的频点信息(包括邻小区使用的非授权频点及其对应的备用 频点); 若同步失败, 则终端尝试同步到信号强度次大的小区的公共控制信道上, 依次类 推;
进一步, 若终端在信道盾量最优的第一类授权频点上都同步失败, 则终端尝试同步到 信道盾量次优的第一类授权频点的小区的公共控制信道上, 依次类推; 若终端在所有第一 类授权频点上都同步失败,则终端选择方式 B以确定第一类授权频点及第一类非授权频点。
进一步, 终端根据获取的频点信息中非授权频点的有效时限信息, 确定第一类非授权 频点包括:
终端将获取的频点信息中没有超过有效时限的非授权频点作为第一类非授权频点; 终端将获取的频点信息中超过有效时限的非授权频点对应的备用频点作为第一类非 授权频点; 及
终端将无法获取到有效时限信息的非授权频点及其对应的备用频点都作为第一类非 授权频点。
方式 A2、若终端具有先验信息, 且该先验信息中仅包含非授权频点的频点信息, 则终
端确定感知系统所支持频点中的第一类授权频点及第一类非授权频点包括: 终端确定该感知系统所支持的频点中不包含第一类授权频点;
终端根据先验信息包含的频点信息中非授权频点的有效时限信息, 确定第一类非授权 频点, 具体确定方式请参阅方式 A1中的描述。
方式 A3、若终端具有先验信息,且该先验信息中包含授权频点的频点信息及非授权频 点的频点信息, 则终端确定感知系统所支持频点中的第一类授权频点及第一类非授权频点 包括:
终端将先验信息中包含的所有授权频点作为第一类授权频点;
终端根据先验信息包含的频点信息中非授权频点的有效时限信息, 确定第一类非授权 频点, 具体确定方式请参阅方式 A1中的描述。
针对方式 B , 终端釆用方式 B确定感知系统所支持频点中的第一类授权频点及第一类 非授权频点包括:
终端通过预设的信道与数据库所属的系统建立连接, 其中, 终端连接到数据库所属的 系统的预设的信道可以由协议规定或政策规定, 以保证在某个地区存在固定的频段提供该 接入功能;
终端向数据库所属的系统发送用于查询授权频点及非授权频点的访问请求, 其中, 访 问请求中包括该终端的属性信息, 以及频点信息获取请求;
终端根据接收到的频点信息, 确定第一类授权频点及第一类非授权频点。
具体的, 终端向数据库所属的系统发送用于查询授权频点及非授权频点的访问请求, 可以是指终端向数据库所属的系统发送用于查询该终端所在小区当前使用的授权频点和 / 或非授权频点的访问请求。
进一步, 数据库可以由授权系统建立并维护, 也可以由感知系统自身建立和维护, 还 可以由第三方建立并维护;
数据库除了可以提供频点信息之外, 还可以提供带宽信息、 小区 ID、 同步信道所使用 的同步序列信息等, 但对于数据库来说, 频点信息是必须提供的。
进一步, 终端根据数据库提供的频点信息, 确定第一类授权频点及第一类非授权频点 包括:
终端将该频点信息中包含的所有授权频点作为第一类授权频点;
终端将根据频点信息中非授权频点的有效时限信息, 确定第一类非授权频点, 具体确 定方式请参阅方式 A1中的描述。
应当指出的是, 终端根据数据库提供的频点信息, 按照以上方式确定第一类授权频点 及第一类非授权频点的前提是, 数据库提供的频点信息中既包括授权频点的频点信息, 也 包括非授权频点的频点信息。 如果数据库提供的频点信息仅是授权频点的频点信息, 或者
仅是非授权频点的频点信息, 其具体确定方式可以参阅方式 A1中的描述。
终端在确定了第一类授权频点及第一类非授权频点之后, 还包括:
将感知系统所支持的授权频点中除第一类授权频点之外的其他授权频点作为第二类 授权频点; 以及
将感知系统所支持的非授权频点中除第一类非授权频点之外的其他非授权频点作为 第二类非授权频点。
需要说明的是,若终端釆用方式 A及方式 B均未确定第一类授权频点, 则确定该感知 系统所支持的频点中不包含第一类授权频点; 并将该感知系统所支持的频点中的所有授权 频点作为第二类授权频点;
若终端釆用方式 A及方式 B均未确定第一类非授权频点,则确定该感知系统所支持的 频点中不包含第一类非授权频点; 并将该感知系统所支持的频点中的所有非授权频点作为 第二类非授权频点。
进一步, 步骤 12 中终端按照优先级从高到低的顺序, 在所述感知系统对应的频点上 进行小区搜索及小区驻留包括:
终端在该感知系统的第一类授权频点上进行小区搜索及小区驻留, 在检测到合适的小 区后, 驻留到该小区;
若在第一类授权频点上没有检测到合适的小区进行驻留, 则终端在该感知系统的第一 类非授权频点上进行小区搜索及小区驻留, 在检测到合适的小区后, 驻留到该小区; 若在第一非类授权频点上没有检测到合适的小区进行驻留, 则终端在该感知系统的第 二类授权频点上进行小区搜索及小区驻留, 在检测到合适的小区后, 驻留到该小区; 若终端在第二类授权频点上没有检测到合适的小区进行驻留, 则在该感知系统的第二 类非授权频点上进行小区搜索及小区驻留, 在检测到合适的小区后, 驻留到该小区; 若在第二类非授权频点上没有检测到合适的小区进行驻留, 则终端停止进行小区搜 索, 并在设定的时长之后, 重复上述步骤, 即按照优先级从高到低的顺序, 重新在感知系 统对应的频点上进行小区搜索及小区驻留。
进一步, 若终端支持多种无线接入模式, 则可以尝试其他接入模式进行接入该感知系 统, 具体流程同上。
进一步, 若确定的第一类授权频点的数量为多个, 终端在第一类授权频点上进行小区 搜索及小区驻留包括: 终端按照信道盾量从高到低的顺序, 在对应的第一类授权频点上进 行小区搜索及小区驻留;
若确定的第一类非授权频点的数量为多个, 终端在第一类非授权频点上进行小区搜索 及小区驻留包括: 终端按照信道盾量从高到低的顺序, 在对应的第一类非授权频点上进行 小区搜索及小区驻留;
若确定的第二类授权频点的数量为多个, 终端在第二类授权频点上进行'』、区搜索及小 区驻留包括: 终端按照信道盾量从高到低的顺序, 在对应的第二类授权频点上进行小区搜 索及小区驻留;
若确定的第二类非授权频点的数量为多个, 终端在第二类非授权频点上进行'』、区搜索 及小区驻留包括: 终端按照信道盾量从高到低的顺序, 在对应的第二类非授权频点上进行 小区搜索及小区驻留。
进一步, 针对某一频点, 终端进行小区选择的过程包括:
非接入层(Non Access Stratum, NAS )激活无线资源控制 ( Radio Resource Control, RRC )层, 开始小区选择过程;
RRC层通知物理层( Physical Layer, PHY ), 进行参考信号接收功率( Reference Signal
Received Power, RSRP )的测量, 同时激活媒盾接入控制( Medium Access Control, MAC ) 层, 由 NULL (空值)状态转入小区选择状态;
PHY将 RSRP测量值及对应的小区信息上报给 RRC层;
RRC层根据 RSRP测量值的大小, 进行排序, 并请求 PHY同步到 RSRP测量值最大 的小区 (即信号最强的小区);
若 PHY成功同步到信号最强的小区, 通过该小区的广播信道接收广播信息, 并将广 播信息上报给 RRC;
RRC根据广播信息的内容及该小区的 RSRP测量值, 判断该小区是否为 NAS规定的 公共陆地移动网 ( Public Land Mobile Network, PLMN ) 小区; 若是, 则进行 S准则 (即 驻留条件判断)判断;
若该小区满足驻留条件(即 S>0 ), 则驻留到该小区, 并进入 IDLE状态;
若该小区不满足驻留条件 , 则通知终端同步到信号次强的小区。
进一步, 终端根据公式 1进行小区驻留条件的判断;
S rxlex _ Qrxlevmeas ^rxlev min + ^rxlev min offset ^ ^compensation 公式 1 ;
其中, ^χ/ 表示小区选择 S值, ^表示接收到的参考信号功率值, β^νηιιη 表示接收信号的最小功率值, ^fevmin ( 5ef表示表示当驻留在 VPLMN下周期性地选择高 优先级的 PLMN时^ /ev min的偏移量, P compe丽 tlon = ma^PEMAX_P UMAX^ , 其中, PEMAX表示终端进行上行传输时的最大发射功率, PUMAX表示终端最大射频输出功 率; S准则与当前 TD-LTE中使用的准则一致, 且公式 1中的各参数信息由上述广播信道 信息提供;
若 SrxkX〉 0, 则该小区满足驻留条件;
若 SrxleX ≤ 0 ' 则该小区不满足驻留条件。
下面通过三个具体的应用实施例对本申请提供的方法在具体应用场景中的实现方式
进行详细说明。
实施例一:
对应于上述方式 A1 , 在 CA系统中, 假设当前有一个支持 TD-LTE的终端开机进行小 区搜索及小区驻留过程。 其中, CA系统对应的非授权频点包括 fl , £2 , β , f4及 f5 , 授 权频点包括 f6 , f7及 ffi , 终端关机之前工作在 CA系统中载波频点为 f6的 TD-LTE小区, 且该终端存储了该频点 f6的频点信息。
参见图 2 , 终端进行小区搜索及小区驻留的过程包括以下步骤:
步骤 201、 终端测量 f6对应的各小区的信号强度值, 并尝试同步到信号强度值最大的 小区的公共控制信道(本实施例以广播信道为例进行说明);
若同步成功, 则读取广播信道信息, 以获取判断该小区驻留所需的参数信息及该小区 及其邻 、区使用的非授权频点, 并执行步骤 202; 假设获取到的邻小区使用的非授权频点 为 fl , β ;
若同步失败, 则执行步骤 204。
步骤 202、 终端根据获取到的频点为 f6的小区的参数信息, 根据 S准则 (即公式 1 ) 得到的小区选择 S值(即 的值)判断该小区是否满足驻留条件;
若是, 即 SrxkX〉 0, 则执行步骤 203 ;
若否 ' 即 SrxleX ≤ 0 ' 则执行步骤 204;
步骤 203、 终端驻留到该小区;
步骤 204、终端测量非授权频点 fl及 β的信道盾量,选择信道盾量最优的频点进行同 步;
例如, fl的信道盾量优于 β的信道盾量, 则先尝试同步到 fl上的广播信道, 若同步 成功, 则通过 fl的广播信道获取判断小区驻留所需的参数信息, 并根据公式 1判断频点为 fl的小区是否满足驻留条件,其判断过程与步骤 202中判断频点为 f6的小区是否满足驻留 条件相似, 此处不再赘述;
若是, 则驻留到该小区;
若否, 则尝试同步到 β的广播信道, 其过程与同步到 fl上的广播信道相似, 此处不 再赘述;
若同步失败, 则尝试同步到 β的广播信道, 其过程同上。
步骤 205、 若终端在同步到 fl的广播信道及 β的广播信道时都失败, 或频点为 fl及 β的小区都不满足驻留条件, 则终端测量没有先验信息的授权频点 f7及 ffi的信道盾量, 并选择信道盾量最优的频点进行同步;
例如, f7的信道盾量优于 β的信道盾量, 则先尝试同步到 f7的广播信道, 若同步成 功后, 获取判断小区驻留所需的参数信息, 并判断是否满足驻留条件; 若满足驻留条件,
则驻留到频点为 f7的小区;
若同步失败或不满足驻留条件, 则尝试同步到 f8的广播信道, 执行相同的判断流程, 一旦满足驻留条件, 则驻留到频点为 f8的小区;
步骤 206、 若终端在同步到 η的广播信道及 的广播信道时都失败, 或频点为 η及 β的小区都不满足驻留条件, 则终端测量没有先验信息的非授权频点 £2、 f4及 f5的信道 盾量, 并选择信道盾量最优的频点进行同步;
例如, £2的信道盾量优于 f4的信道盾量, f4的信道盾量优于 f5的信道盾量, 则先尝 试同步到 £2的广播信道, 若同步成功后, 获取判断小区驻留所需的参数信息, 并判断是否 满足驻留条件; 若满足驻留条件, 则驻留到频点为 £2的小区;
若同步失败或不满足驻留条件,则尝试同步到 f4的广播信道,并执行相同的判断流程, 一旦满足驻留条件, 则驻留到频点为 f4的小区;
若同步失败或不满足驻留条件,则尝试同步到 f5的广播信道,并执行相应的判断流程, 一旦满足驻留条件, 则驻留到频点为 f5的小区;
步骤 207、 若终端在同步到 £2、 f4及 f5的广播信道时都失败, 或频点为 £2、 f4及 f5 的小区都不满足驻留条件, 即终端未搜索到合适的小区进行驻留, 则终端等待一段设定的 时间后重新发起执行步骤 201〜步骤 206。
需要说明的是, 步骤 207中, 若终端同时支持多种无线接入模式, 终端尝试用其他接 入模式进行接入, 具体流程和上述步骤 201〜步骤 206相似, 此处不再赘述。
实施例二:
对应于上述方式 B, 在 CA系统中, 假设当前有一支持 TD-LTE的终端开机进行小区 搜索及小区驻留过程。 其中, CA系统对应的非授权频点包括 fl , £2, β , f4及 f5 , 授权 频点包括 f6, f7及 f8, 终端关机之前工作在 CA系统中载波频点为 f6的 TD-LTE小区, 且 该终端存储了该频点 f6的频点信息, 且规定的访问数据库的信道承载在载波 上。
参见图 3 , 终端进行小区搜索及小区驻留的过程包括以下步骤:
步骤 300、 终端通过载波 对应的信道向数据库服务器发送访问请求, 以获取频点信 息;
其中, 访问请求包括终端自身的信息和请求获取该终端所在区域及邻区域中非授权频 点的使用情况, 终端自身的信息包括该终端的地理位置、 该终端支持的无线接入模式及该 终端的 RF能力等;
数据库服务器根据终端的访问请求, 通知终端所在区域的授权频点包括 f6, 非授权频 点包括 fl及 β , 各频点承载的无线接入技术为 TD-LTE, 及各频点的其他信息, 例如频点 对应的小区 ID、 同步信息等;
步骤 301、 终端测量测量 f6对应的各小区的信号强度值, 并尝试同步到信号强度值最
大的小区的公共控制信道(本实施例以广播信道为例进行说明);
若同步成功, 则读取广播信道信息, 以获取判断该小区驻留所需的参数信息, 并执行 步骤 302;
若同步失败, 则执行步骤 304
步骤 302〜步骤 307与步骤 202〜步骤 207相同, 此处不再赘述。
实施例三:
对应于上述方式 A3 , 在 CA系统中, 假设当前有一个支持 TD-LTE的终端开机进行小 区搜索及小区驻留过程。 其中, C A系统对应的非授权频点包括 fl £2 β f4及 f5 , 授 权频点包括 f6 f7及 ffi , 终端关机之前工作在 CA系统中载波频点为 f6的 TD-LTE小区, 且该终端在先前工作的时候, 通过广播信道或测量获取授权频点的频点信息及非授权频点 的频点信息, 并存储。
参见图 4, 终端进行小区搜索及小区驻留的过程包括以下步骤:
步骤 400、 终端通过存储的频点信息确定第一类授权频点及第一类非授权频点; 假设终端存储的频点信息如表 2所示, 可知, 第一类授权频点为 f6; 对于非授权频点 f5 , 由于 f5已经超过了其有效时限, 则将 f5对应的备用频点 fl作为第一类非授权频点; 对于非授权频点 β , 由于 β没有超过其有效时限, 则将 β也作为第一类非授权频点; 对 于非授权频点 £2, 由于无法获知其有效时限的信息, 因此无法判断 £2是否过期, 因此将 £2及其对应的备用频点 f4也作为第一类非授权频点;
表 2
其中, NULL表示空值。
步骤 401、 终端测量 f6对应的各小区的信号强度值, 并尝试同步到信号强度值最大的 小区的公共控制信道(本实施例以广播信道为例进行说明);
若同步成功, 则读取广播信道信息, 以获取判断该小区驻留所需的参数信息, 并执行 步骤 402;
若同步失败, 则执行步骤 404。
步骤 402〜步骤 407与步骤 202〜步骤 207相似, 此处不再赘述。
基于同一发明构思, 本申请实施例中还提供了一种感知系统中进行小区搜索的装置, 由于该装置解决问题的原理与上述感知系统中进行小区搜索的方法相似, 因此该装置的实 施可以参见方法的实施, 重复之处不再赘述。
参见图 5 , 本申请实施例一种感知系统中进行小区搜索的装置, 包括:
确定模块 51 , 用于确定感知系统所支持的频点中不同种类的频点, 其中, 按照优先级 从高到低的顺序, 感知系统的频点分为第一类授权频点、 第一类非授权频点、 第二类授权 频点及第二类非授权频点;
处理模块 52, 用于按照优先级从高到低的顺序, 在感知系统所支持的频点上进行小区 搜索及小区驻留;
其中, 第二类授权频点包括感知系统所支持的授权频点中除第一类授权频点之外的授 权频点; 第二类非授权频点包括感知系统所支持的非授权频点中除第一类非授权频点之外 的非授权频点。
优选的, 确定模块 51具体用于:
确定感知系统所支持频点中的第一类授权频点及第一类非授权频点;
将感知系统的授权频点中除第一类授权频点之外的授权频点作为第二类授权频点; 将感知系统的非授权频点中除第一类非授权频点之外的授权频点作为第二类非授权 频点。
基于上述任意装置侧实施例, 优选的, 确定模块 51具体用于:
根据自身存储的先验信息中的频点信息, 确定第一类授权频点及第一类非授权频点 (方式 A ); 和 /或,
根据数据库中存储的上述装置所在小区当前使用的授权频点和 /或非授权频点的频点 信息, 确定第一类授权频点及第一类非授权频点 (方式 B )。
针对上述方式 A, 优选的, 确定模块 51具体可以用于:
在装置具有先验信息, 且先验信息中包含授权频点的频点信息时, 将先验信息中包含 的所有授权频点作为第一类授权频点; 同步到使用第一类授权频点的小区的公共控制信道 上, 并获取邻小区对应的频点信息; 以及根据获取的频点信息中非授权频点的有效时限信
息, 确定第一类非授权频点。
针对上述方式 A, 优选的, 确定模块 51具体还可以用于:
在装置具有先验信息, 且先验信息中仅包含非授权频点的频点信息时, 确定感知系统 所支持的频点中不包含第一类授权频点; 及根据频点信息中非授权频点的有效时限信息, 确定第一类非授权频点。
针对上述方式 A, 优选的, 确定模块 51具体还可以用于:
在装置具有先验信息, 且先验信息中包含授权频点的频点信息及非授权频点的频点信 息时, 将先验信息中所有授权频点作为第一类授权频点; 以及根据频点信息中非授权频点 的有效时限信息, 确定第一类非授权频点。
针对上述方式 A的上述第一种优选方式, 优选的, 确定模块 51具体用于: 在使用第一类授权频点的小区的数量为多个时, 按照信号强度从大到小的顺序进行同 步尝试, 同步到对应的小区的公共控制信道上。
针对上述方式 B , 优选的, 确定模块 51具体用于:
通过预设的信道与数据库所属的系统建立连接; 向数据库所属的系统发送用于查询授 权频点及非授权频点的访问请求; 以及根据接收到的频点信息, 确定第一类授权频点及第 一类非授权频点;
其中, 访问请求中包括装置的属性信息, 以及频点信息获取请求。
针对上述方式 B , 优选的, 确定模块 51具体用于:
通过预设的信道与所述数据库所属的系统建立连接; 向所述数据库所属的系统发送用 于查询所述装置所在小区当前使用的授权频点和 /或非授权频点的访问请求;以及根据接收 到的频点信息, 确定所述第一类授权频点及所述第一类非授权频点;
其中, 所述访问请求中包括所述装置的属性信息, 以及频点信息获取请求
针对上述方式 B的上述优选实现方式, 优选的, 确定模块 51具体用于:
将频点信息中的授权频点作为第一类授权频点; 以及根据频点信息中非授权频点的有 效时限信息, 确定第一类非授权频点。
基于上述任意装置侧实施例, 优选的, 确定模块 51具体用于:
将频点信息中没有超过有效时限的非授权频点作为第一类非授权频点; 将频点信息中 超过有效时限的非授权频点对应的备用频点作为第一类非授权频点; 及将无法获取到有效 时限信息的非授权频点及其对应的备用频点作为第一类非授权频点。
基于上述任意装置侧实施例, 优选的, 处理模块 52具体用于:
在确定的第一类授权频点的数量为多个时, 按照信道盾量从高到低的顺序, 在对应的 第一类授权频点上进行小区搜索及小区驻留;
在确定的第一类非授权频点的数量为多个时, 按照信道盾量从高到低的顺序, 在对应
的第一类非授权频点上进行小区搜索及小区驻留;
在确定的第二类授权频点的数量为多个时, 按照信道盾量从高到低的顺序, 在对应的 第二类授权频点上进行小区搜索及小区驻留;
在确定的第二类非授权频点的数量为多个时, 按照信道盾量从高到低的顺序, 在对应 的第二类非授权频点上进行小区搜索及小区驻留。
基于上述任意装置侧实施例, 优选的, 处理模块 52还用于:
在第一类授权频点、 第一类非授权频点、 第二类授权频点及第二类非授权频点上小区 驻留失败后, 停止进行小区搜索; 并在设定的时长之后, 按照优先级从高到低的顺序, 重 新在该感知系统对应的频点上进行小区搜索及小区驻留。
本发明实施例提供的感知系统中进行小区搜索的装置, 可以但不仅限于是上述方法实 施例中的终端。
本领域内的技术人员应明白, 本申请的实施例可提供为方法、 系统、 或计算机程序产 品。 因此, 本申请可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且, 本申请可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 (包括但不限于磁盘存储器、 CD-ROM、 光学存储器等)上实施的计算机程 序产品的形式。
本申请是参照根据本申请实施例的方法、 设备(系统)、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理, 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本申请的优选实施例, 但本领域内的技术人员一旦得知了基本创造性概 念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释为包括优选
实施例以及落入本申请范围的所有变更和修改。
本申请实施例终端确定感知系统所支持频点中的第一类授权频点及第一类非授权频 点, 并按照优先级从高到低的顺序, 在感知系统对应的频点上进行小区搜索及小区驻留, 优化了小区选择机制, 从而能够快速准确地选择到合适的小区进行驻留, 从而减少了终端 开机后进行小区选择及小区驻留操作的时延, 提高了用户体验。
显然, 本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和 范围。这样,倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内, 则本申请也意图包含这些改动和变型在内。
Claims
1、 一种感知系统中进行小区搜索的方法, 其特征在于, 该方法包括:
终端确定感知系统所支持的频点中不同种类的频点, 其中, 按照优先级从高到低的顺 序, 所述感知系统的频点分为第一类授权频点、 第一类非授权频点、 第二类授权频点及第 二类非授权频点;
所述终端按照所述优先级从高到低的顺序, 在所述感知系统所支持的频点上进行小区 搜索及小区驻留;
其中, 所述第二类授权频点包括所述感知系统所支持的授权频点中除第一类授权频点 之外的授权频点, 所述第二类非授权频点包括所述感知系统所支持的非授权频点中除第一 类非授权频点之外的非授权频点。
2、 如权利要求 1 所述的方法, 其特征在于, 所述终端确定感知系统所支持频点中的 第一类授权频点及第一类非授权频点, 具体包括:
所述终端根据自身存储的先验信息中的频点信息, 确定所述第一类授权频点及所述第 一类非授权频点; 和 /或
所述终端根据数据库中存储的所述终端所在小区当前使用的授权频点和 /或非授权频 点的频点信息, 确定所述第一类授权频点及所述第一类非授权频点。
3、 如权利要求 2 所述的方法, 其特征在于, 若所述终端具有先验信息, 且所述先验 信息中包含授权频点的频点信息, 所述终端根据自身存储的先验信息中的频点信息, 确定 所述第一类授权频点及所述第一类非授权频点包括:
所述终端将所述先验信息中包含的所有授权频点作为第一类授权频点;
所述终端同步到使用所述第一类授权频点的小区的公共控制信道上, 并获取邻小区对 应的频点信息;
所述终端根据所述频点信息中非授权频点的有效时限信息, 确定第一类非授权频点。
4、 如权利要求 2 所述的方法, 其特征在于, 若所述终端具有先验信息, 且所述先验 信息中仅包含非授权频点的频点信息, 所述终端根据自身存储的先验信息中的频点信息, 确定所述感知系统所支持频点中的所述第一类授权频点及所述第一类非授权频点包括: 所述终端确定所述感知系统所支持的频点中不包含第一类授权频点;
所述终端根据所述频点信息中非授权频点的有效时限信息, 确定第一类非授权频点。
5、 如权利要求 2 所述的方法, 其特征在于, 若所述终端具有先验信息, 且所述先验 信息中包含授权频点的频点信息及非授权频点的频点信息, 所述终端根据自身存储的先验 信息中的频点信息, 确定所述感知系统所支持频点中的所述第一类授权频点及所述第一类
非授权频点包括:
所述终端将所述先验信息中所有授权频点作为所述第一类授权频点;
所述终端根据所述频点信息中非授权频点的有效时限信息, 确定第一类非授权频点。
6、 如权利要求 3 所述的方法, 其特征在于, 若使用所述第一类授权频点的小区的数 量为多个, 所述终端同步到使用该第一类授权频点的小区的公共控制信道上包括:
所述终端按照信号强度从大到小的顺序, 同步到对应的小区的公共控制信道上。
7、 如权利要求 2 所述的方法, 其特征在于, 所述终端根据数据库中存储的所述终端 所在小区当前使用的授权频点和 /或非授权频点的频点信息,确定所述第一类授权频点及所 述第一类非授权频点, 包括:
所述终端通过预设的信道与所述数据库所属的系统建立连接;
所述终端向所述数据库所属的系统发送用于查询授权频点及非授权频点的访问请求, 其中, 所述访问请求中包括所述终端的属性信息, 以及频点信息获取请求; 或者, 所述终 端向所述数据库所属的系统发送用于查询所述终端所在小区当前使用的授权频点和 /或非 授权频点的访问请求, 其中, 所述访问请求中包括所述终端的属性信息, 以及频点信息获 取请求;
所述终端根据接收到的频点信息, 确定所述第一类授权频点及所述第一类非授权频
8、 如权利要求 7 所述的方法, 其特征在于, 所述终端根据接收到的频点信息, 确定 所述第一类授权频点及所述第一类非授权频点包括:
所述终端将所述频点信息中的授权频点作为所述第一类授权频点;
所述终端根据所述频点信息中非授权频点的有效时限信息, 确定第一类非授权频点。
9、 如权利要求 3或 4或 5或 8所述的方法, 其特征在于, 所述终端确定第一类非授 权频点包括:
所述终端将所述频点信息中没有超过所述有效时限的非授权频点作为第一类非授权 频点;
所述终端将所述频点信息中超过所述有效时限的非授权频点对应的备用频点作为第 一类非授权频点; 及
所述终端将无法获取到有效时限信息的非授权频点及其对应的备用频点作为第一类 非授权频点。
10、 如权利要求 1所述的方法, 其特征在于, 若确定的所述第一类授权频点的数量为 多个, 所述终端在所述第一类授权频点上进行小区搜索及小区驻留包括: 所述终端按照信 道盾量从高到低的顺序, 在对应的第一类授权频点上进行小区搜索及小区驻留;
若确定的第一类非授权频点的数量为多个, 所述终端在所述第一类非授权频点上进行
小区搜索及小区驻留包括: 所述终端按照信道盾量从高到低的顺序, 在对应的第一类非授 权频点上进行小区搜索及小区驻留;
若确定的第二类授权频点的数量为多个, 所述终端在所述第二类授权频点上进行小区 搜索及小区驻留包括: 所述终端按照信道盾量从高到低的顺序, 在对应的第二类授权频点 上进行小区搜索及小区驻留;
若确定的第二类非授权频点的数量为多个, 所述终端在所述第二类非授权频点上进行 小区搜索及小区驻留包括: 所述终端按照信道盾量从高到低的顺序, 在对应的第二类非授 权频点上进行小区搜索及小区驻留。
11、如权利要求 1或 10所述的方法, 其特征在于, 所述终端在所述感知系统所支持的 频点上进行小区搜索及小区驻留包括:
所述终端在确定的第一类授权频点、 第一类非授权频点、 第二类授权频点及第二类非 授权频点上小区驻留失败后, 停止进行小区搜索;
所述终端在设定的时长之后 , 按照所述优先级从高到低的顺序, 重新在所述感知系统 对应的频点上进行小区搜索及小区驻留。
12、 一种感知系统中进行小区搜索的装置, 其特征在于, 该装置包括:
确定模块, 用于确定感知系统所支持的频点中不同种类的频点, 其中, 按照优先级从 高到低的顺序, 所述感知系统的频点分为第一类授权频点、 第一类非授权频点、 第二类授 权频点及第二类非授权频点;
处理模块, 用于按照所述优先级从高到低的顺序, 在所述感知系统所支持的频点上进 行小区搜索及小区驻留;
其中, 所述第二类授权频点包括所述感知系统所支持的授权频点中除第一类授权频点 之外的授权频点; 所述第二类非授权频点包括所述感知系统所支持的授权频点中除第一类 非授权频点之外的非授权频点。
13、 如权利要求 12所述的装置, 其特征在于, 所述确定模块具体用于:
根据自身存储的先验信息中的频点信息, 确定所述第一类授权频点及所述第一类非授 权频点; 和 /或
根据数据库中存储的所述装置所在小区当前使用的授权频点和 /或非授权频点的频点 信息, 确定所述第一类授权频点及所述第一类非授权频点。
14、 如权利要求 13所述的装置, 其特征在于, 所述确定模块具体用于:
在所述装置具有先验信息, 且所述先验信息中包含授权频点的频点信息时, 将所述先 验信息中包含的所有授权频点作为第一类授权频点; 同步到使用所述第一类授权频点的小 区的公共控制信道上, 并获取邻小区对应的频点信息; 以及根据获取的所述频点信息中非 授权频点的有效时限信息, 确定第一类非授权频点。
15、 如权利要求 13所述的装置, 其特征在于, 所述确定模块具体用于: 在所述装置具有先验信息, 且所述先验信息中仅包含非授权频点的频点信息时, 确定 所述感知系统所支持的频点中不包含第一类授权频点; 及根据所述频点信息中非授权频点 的有效时限信息, 确定第一类非授权频点。
16、 如权利要求 13所述的装置, 其特征在于, 所述确定模块具体用于:
在所述装置具有先验信息, 且所述先验信息中包含授权频点的频点信息及非授权频点 的频点信息时, 将所述先验信息中所有授权频点作为所述第一类授权频点; 以及根据所述 频点信息中非授权频点的有效时限信息, 确定第一类非授权频点。
17、 如权利要求 14所述的装置, 其特征在于, 所述确定模块具体用于:
在使用所述第一类授权频点的小区的数量为多个时, 按照信号强度从大到小的顺序, 同步到对应的小区的公共控制信道上。
18、 如权利要求 13所述的装置, 其特征在于, 所述确定模块具体用于:
通过预设的信道与所述数据库所属的系统建立连接; 向所述数据库所属的系统发送用 于查询授权频点及非授权频点的访问请求; 以及根据接收到的频点信息, 确定所述第一类 授权频点及所述第一类非授权频点;
其中, 所述访问请求中包括所述装置的属性信息, 以及频点信息获取请求; 或者, 所述确定模块具体用于:
通过预设的信道与所述数据库所属的系统建立连接; 向所述数据库所属的系统发送用 于查询所述装置所在小区当前使用的授权频点和 /或非授权频点的访问请求;以及根据接收 到的频点信息, 确定所述第一类授权频点及所述第一类非授权频点;
其中, 所述访问请求中包括所述装置的属性信息, 以及频点信息获取请求。
19、 如权利要求 18所述的装置, 其特征在于, 所述确定模块具体用于:
将所述频点信息中的授权频点作为所述第一类授权频点; 以及根据所述频点信息中非 授权频点的有效时限信息, 确定第一类非授权频点。
20、如权利要求 14、 15、 16或 19所述的装置, 其特征在于, 所述确定模块具体用于: 将所述频点信息中没有超过所述有效时限的非授权频点作为第一类非授权频点; 将所 述频点信息中超过所述有效时限的非授权频点对应的备用频点作为第一类非授权频点; 及 将无法获取到有效时限信息的非授权频点及其对应的备用频点作为第一类非授权频点。
21、 如权利要求 12所述的装置, 其特征在于, 所述处理模块具体用于:
在确定的所述第一类授权频点的数量为多个时, 按照信道盾量从高到低的顺序, 在对 应的第一类授权频点上进行小区搜索及小区驻留;
在确定的第一类非授权频点的数量为多个时, 按照信道盾量从高到低的顺序, 在对应 的第一类非授权频点上进行小区搜索及小区驻留;
在确定的第二类授权频点的数量为多个时, 按照信道盾量从高到低的顺序, 在对应的 第二类授权频点上进行小区搜索及小区驻留;
在确定的第二类非授权频点的数量为多个时, 按照信道盾量从高到低的顺序, 在对应 的第二类非授权频点上进行小区搜索及小区驻留。
22、 如权利要求 12或 21所述的装置, 其特征在于, 所述处理模块还用于: 在确定的第一类授权频点、 第一类非授权频点、 第二类授权频点及第二类非授权频点 上小区驻留失败后, 停止进行小区搜索; 并在设定的时长之后, 按照所述优先级从高到低 的顺序, 重新在所述感知系统对应的频点上进行小区搜索及小区驻留。
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