CN107124740B - Cell reselection method and device - Google Patents
Cell reselection method and device Download PDFInfo
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- CN107124740B CN107124740B CN201610101528.7A CN201610101528A CN107124740B CN 107124740 B CN107124740 B CN 107124740B CN 201610101528 A CN201610101528 A CN 201610101528A CN 107124740 B CN107124740 B CN 107124740B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0094—Definition of hand-off measurement parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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Abstract
The invention provides a cell reselection method and deviceAnd (4) placing. The method comprises the following steps: when the user equipment is in an idle state and the signal quality of the serving cell is less than that of an adjacent cell, acquiring a first offset of the serving cell, wherein the first offset is used for representing an offset value of the serving cell relative to the signal quality received by the monitoring user equipment, and the central frequency points of the adjacent cell and the serving cell are the same or the priorities of the adjacent cell and the serving cell are the same; the signal quality and the hysteresis quantity Q of the serving cellHystThen subtracting the first offset to obtain Rs(ii) a Subtracting the offset Q from the signal quality of the neighbor celloffsetTo obtain Rn(ii) a If according to RnAnd RsAnd if the adjacent cell is determined to be the reselection target cell, starting cell reselection. The invention ensures that the serving cell reselection threshold of the idle state monitoring user equipment is higher than that of the idle state user equipment in the public network so as to ensure the continuity of the monitoring service of the idle state monitoring user equipment.
Description
Technical Field
The present invention relates to wireless communication technologies, and in particular, to a cell reselection method and apparatus.
Background
A wireless trunking communication system is a private mobile communication system in which a plurality of user equipments form a group, the group shares a set of wireless channels, and the wireless channels are dynamically used. Wherein, a main user equipment and a plurality of monitoring user equipments exist in a group. The base station needs to allocate an uplink channel to the talkback user equipment, so that the talkback user equipment is in a connected state; the monitoring ue only needs to receive the group information broadcasted by the base station at a specific location, so the monitoring ue can be in a connected state or an idle state. The idle state monitoring user equipment performs monitoring service switching in a reselection mode.
The existing cell reselection method is directed at idle state user equipment in a public network, and the idle state user equipment in the public network only needs to receive system messages and paging messages, so that no service requirement exists; the listening ue needs to listen to the channel broadcasted by the group to receive the service, so the existing cell reselection method is not suitable for the idle listening ue.
Therefore, how to perform cell reselection for the idle listening ue to ensure continuity of listening service needs to be solved urgently.
Disclosure of Invention
The invention provides a cell reselection method and a cell reselection device, which aim to perform cell reselection aiming at idle state monitoring user equipment and ensure the continuity of monitoring services.
In a first aspect, the present invention provides a cell reselection method, applied to a wireless trunking communication system, the method including: when user equipment is in an idle state and the signal quality of a serving cell is smaller than that of an adjacent cell, acquiring a first offset of the serving cell, wherein the first offset is used for representing an offset value of the serving cell relative to the signal quality received by monitoring the user equipment, and a central frequency point of the adjacent cell is the same as that of the serving cell, or the central frequency point of the adjacent cell is different from that of the serving cell but the priority of the adjacent cell is the same as that of the serving cell; the signal quality and the hysteresis quantity Q of the serving cellHystAnd subtracting the first offset to obtain Rs(ii) a Subtracting the bias Q from the signal quality of the neighboring celloffsetTo obtain Rn(ii) a According to RnAnd RsDetermining whether the neighboring cell is a reselection target cell; and if the adjacent cell is determined to be the reselection target cell, starting cell reselection.
In one embodiment, the above is according to RnAnd RsDetermining whether the neighboring cell is a reselection target cell, including: judging whether the residence time of the user equipment in the serving cell exceeds preset time or not; if the residence time of the user equipment in the service cell exceeds the preset time and within the preset detection time, RnIs always greater than RsDetermining that the neighboring cell is a reselection target cell; or, if saidThe residence time of the user equipment in the service cell is less than the preset time, and/or R exists in the preset detection timenIs less than or equal to RsAnd determining that the neighboring cell is not the reselection target cell.
In an embodiment, the signal quality of the neighboring cell is subtracted by an offset QoffsetTo obtain RnBefore, still include: determining a neighboring cell with the best signal quality in neighboring cells with the signal quality greater than that of the serving cell as a first neighboring cell; correspondingly, subtracting the bias Q from the signal quality of the neighboring celloffsetTo obtain RnThe method comprises the following steps: subtracting the offset Q from the signal quality of the first neighboring celloffsetTo obtain Rn。
In an embodiment, the obtaining the first offset of the serving cell includes: receiving a system information block SIB20 issued by a base station, wherein the SIB20 carries a first offset of the serving cell; or receiving a system information block SIB1 or SIB4 transmitted by the base station, where an extension field of the SIB1 or SIB4 carries the first offset of the serving cell.
In a second aspect, the present invention provides a cell reselection method, applied to a wireless trunking communication system, the method including: when user equipment is in an idle state and the signal quality of a serving cell is smaller than that of an adjacent cell, acquiring a second offset of the serving cell, wherein the second offset is used for representing an offset value of the serving cell relative to monitoring user equipment, a central frequency point of the adjacent cell is different from a central frequency point of the serving cell, and the cell reselection priority of the adjacent cell is lower than that of the serving cell; if the first condition or the second condition is satisfied, determining that the neighboring cell is a reselection target cell, and starting cell reselection; wherein the first condition is that the signal level measurement value Srxlev of the serving cell minus the second offset is smaller than a low priority reselection threshold Thresh of a first serving frequency pointServing,LowPAnd the Srxlev of the adjacent cell is greater than a first low priority reselection threshold value ThreshX,LowP(ii) a The second condition is signal quality measurement of the serving cellAfter the second offset is subtracted from the magnitude Squal, the value is smaller than a low priority reselection threshold Thresh of a second service frequency pointServing,LowQAnd the Squal of the neighboring cell is greater than a second low-priority reselection threshold ThreshX,LowQ。
In an embodiment, the determining that the neighboring cell is the reselection target cell if the first condition or the second condition is met includes: judging whether the residence time of the user equipment in the serving cell exceeds preset time or not; and if the residence time of the user equipment in the serving cell exceeds the preset time and the first condition or the second condition is always satisfied within the preset detection time, determining that the neighboring cell is a reselection target cell.
In an embodiment, the obtaining the second offset of the serving cell includes: receiving a system information block SIB20 sent by a base station, wherein the SIB20 carries a second offset of the serving cell; or receiving a system information block SIB1 or SIB4 transmitted by the base station, where an extension field of the SIB1 or SIB4 carries the second offset of the serving cell.
In a third aspect, the present invention provides a cell reselection apparatus, applied to a wireless trunking communication system, the apparatus including: an obtaining module, configured to obtain a first offset of a serving cell when a user equipment is in an idle state and a signal quality of the serving cell is less than a signal quality of an adjacent cell, where the first offset is used to represent an offset value of the serving cell with respect to a signal quality received by a monitoring user equipment, and a center frequency point of the adjacent cell is the same as a center frequency point of the serving cell, or the center frequency point of the adjacent cell is different from the center frequency point of the serving cell but the priorities of the adjacent cell and the serving cell are the same; a calculating module, configured to calculate the signal quality and the hysteresis Q of the serving cellHystAnd subtracting the first offset to obtain Rs(ii) a And subtracting the bias Q from the signal quality of the neighboring celloffsetTo obtain Rn(ii) a A determining module for determining R obtained by the calculating modulenAnd RsDetermining whether the neighboring cell is a reselection target cell; starting upAnd the module is used for starting cell reselection if the adjacent cell is determined to be the reselection target cell by the determination module.
In an embodiment, the determining module is specifically configured to: judging whether the residence time of the user equipment in the serving cell exceeds preset time or not; if the residence time of the user equipment in the service cell exceeds the preset time and within the preset detection time, RnIs always greater than RsDetermining that the neighboring cell is a reselection target cell; or, if the residence time of the user equipment in the serving cell is less than the preset time, and/or within the preset detection time, R existsnIs less than or equal to RsAnd determining that the neighboring cell is not the reselection target cell.
In an embodiment, the determining module is further configured to: determining a neighboring cell with the best signal quality in neighboring cells with the signal quality greater than that of the serving cell as a first neighboring cell; correspondingly, the computing module is used for subtracting an offset Q from the signal quality of the neighboring celloffsetTo obtain RnThe method specifically comprises the following steps: subtracting the offset Q from the signal quality of the first neighboring celloffsetTo obtain Rn。
In an embodiment, the obtaining module is specifically configured to: receiving a system information block SIB20 issued by a base station, wherein the SIB20 carries a first offset of the serving cell; or receiving a system information block SIB1 or SIB4 transmitted by the base station, where an extension field of the SIB1 or SIB4 carries the first offset of the serving cell.
In a fourth aspect, the present invention provides a cell reselection apparatus, applied to a wireless trunking communication system, the apparatus including: an obtaining module, configured to obtain a second offset of a serving cell when a user equipment is in an idle state and a signal quality of the serving cell is less than a signal quality of an adjacent cell, where the second offset is used to represent an offset value of the serving cell relative to a monitored user equipment, a central frequency point of the adjacent cell is different from a central frequency point of the serving cell, and a cell reselection priority of the adjacent cell is lower than a cell reselection priority of the serving cell; processing module forIf the first condition or the second condition is satisfied, determining that the adjacent cell is a reselection target cell, and starting cell reselection; wherein the first condition is that the signal level measurement value Srxlev of the serving cell minus the second offset is smaller than a low priority reselection threshold Thresh of a first serving frequency pointServing,LowPAnd the Srxlev of the adjacent cell is greater than a first low priority reselection threshold value ThreshX,LowP(ii) a The second condition is that the signal quality measurement value Squal of the service cell is less than a low priority reselection threshold Thresh of a second service frequency point after subtracting the second offset from the signal quality measurement value Squal of the service cellServing,LowQAnd the Squal of the neighboring cell is greater than a second low-priority reselection threshold ThreshX,LowQ。
In an embodiment, the processing module is specifically configured to: judging whether the residence time of the user equipment in the serving cell exceeds preset time or not; and if the residence time of the user equipment in the serving cell exceeds the preset time and the first condition or the second condition is always satisfied within the preset detection time, determining that the neighboring cell is a reselection target cell.
In an embodiment, the obtaining module is specifically configured to: receiving a system information block SIB20 sent by a base station, wherein the SIB20 carries a second offset of the serving cell; or receiving a system information block SIB1 or SIB4 transmitted by the base station, where an extension field of the SIB1 or SIB4 carries the second offset of the serving cell.
The invention calculates R in R criterionsIn the process, compared with the existing calculation process, one first offset is subtracted, so that the serving cell reselection threshold of the idle state monitoring user equipment is higher than the serving cell reselection threshold of the idle state user equipment in the public network, that is, the idle state monitoring user equipment starts cell reselection earlier than the idle state user equipment in the public network, so as to ensure the continuity of the monitoring service of the idle state monitoring user equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of a cell reselection method according to a first embodiment of the present invention;
fig. 2 is a flowchart of a second cell reselection method according to a second embodiment of the present invention;
fig. 3 is a flowchart of a third embodiment of a cell reselection method according to the present invention;
fig. 4 is a schematic structural diagram of a cell reselection apparatus according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second cell reselection device according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
The terms "first," "second," "third," and the like in the description, in the claims, and in the above-described figures are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In cell reselection, the signal quality of a serving cell and a neighboring cell is detected in an idle mode of user equipment, and the best cell is selected to provide service for the user equipment. The invention provides a cell reselection method and a cell reselection device for idle monitoring user equipment in a wireless trunking communication system, so as to meet the service requirement and ensure the continuity of monitoring service.
Fig. 1 is a flowchart of a cell reselection method according to a first embodiment of the present invention. The method may be performed by a cell reselection apparatus, which is integrated in a user equipment, and which may be implemented by means of hardware and/or software. As shown in fig. 1, the method includes:
s101, when user equipment is in an idle state and the signal quality of a serving cell is smaller than that of an adjacent cell, acquiring a first offset of the serving cell, wherein the first offset is used for representing an offset value of the serving cell relative to the signal quality received by monitoring the user equipment, and a central frequency point of the adjacent cell is the same as that of the serving cell, or the central frequency point of the adjacent cell is different from that of the serving cell, but the priority of the adjacent cell is the same as that of the serving cell.
S102, the signal quality and the delay Q of the serving cellHystThen subtracting the first offset to obtain Rs。
S103, subtracting the offset Q from the signal quality of the adjacent regionoffsetTo obtain Rn。
S104, according to RnAnd RsAnd determining whether the adjacent cell is a reselection target cell.
And S105, if the adjacent cell is determined to be the reselection target cell, starting cell reselection.
Specifically, in the prior art, for the case that the center frequency point of the serving cell is the same as the center frequency point of the neighboring cell, or the case that the center frequency point of the neighboring cell is different from the center frequency point of the serving cell but the priorities of the neighboring cell and the serving cell are the same, the R criterion according to which the cell reselection is performed is:
Rs＝Qmeas,s+QHyst
Rn＝Qmeas,n-Qoffset
i.e. the quality of the signal Q at the serving cellmeas,sPlus hysteresis QHystTo obtain RsQuality of signal Q in the neighborhoodmeas,nUp-subtracting offset QoffsetTo obtain Rn. When the user equipment resides in the serving cell for more than 1 second and keeps R for the preset detection timen>RsAnd when the user equipment reselects the adjacent cell. Wherein Q ismeas,sFor example, the Reference Signal Receiving Power (RSRP) of the serving cell, Qmeas,nFor example RSRP of a neighbouring cell.
The monitoring user equipment is in an idle state, but the monitoring user equipment is in group monitoring, the group does not have retransmission and feedback, and the threshold for the user equipment to reside or reselect is higher, so that the common idle state user equipment and the idle state monitoring user equipment in the wireless trunking communication system need to be distinguished, and reselection mechanisms with different thresholds are adopted.
The invention changes the same frequency reselection as follows: at RsIn the calculation of (2) by adding an offset, i.e. Rs＝Qmeas,s+QHyst-QHyst,sc-ptm. Wherein Q isHyst,sc-ptmNamely, the first offset is used to characterize an offset value of the serving cell with respect to the quality of a signal received by the listening ue, that is, the first offset is only effective for the idle listening ue, that is, the reselection of the idle listening ue in the public network is not affected. Thus, at Qmeas,sAnd QHystIn fixed condition, R obtained by idle user equipment in public networksR obtained by monitoring user equipment in idle statesDiffering by a first offset.
It should be noted that the first offset is configured to the listening ue by the base station, and the specific value can be set according to an actual empirical value.
The fruitExample by calculating R in the R criterionsIn the process, compared with the existing calculation process, one first offset is subtracted, so that the serving cell reselection threshold of the idle state monitoring user equipment is higher than the serving cell reselection threshold of the idle state user equipment in the public network, that is, the idle state monitoring user equipment starts cell reselection earlier than the idle state user equipment in the public network, so as to ensure the continuity of the monitoring service of the idle state monitoring user equipment.
The technical scheme shown in figure 1 is that R issThe offset is added in the calculation process of (2). Optionally, as an alternative, R may benThe offset is added in the calculation process of (2), as shown in detail in fig. 2.
Fig. 2 is a flowchart of a second cell reselection method according to the present invention. The method may be performed by a cell reselection apparatus, which is integrated in a user equipment, and which may be implemented by means of hardware and/or software. As shown in fig. 2, the method includes:
s201, when the user equipment is in an idle state and the signal quality of the serving cell is smaller than that of the neighbor cell, acquiring a third offset of the neighbor cell, wherein the third offset is used for representing an offset value of the neighbor cell relative to the signal quality received by the monitoring user equipment, and the central frequency point of the neighbor cell is the same as that of the serving cell, or the central frequency point of the neighbor cell is different from that of the serving cell, but the priority of the neighbor cell is the same as that of the serving cell.
S202, comparing the signal quality of the serving cell with a delay QHystAdding to obtain Rs。
S203, subtracting the offset Q from the signal quality of the adjacent regionoffsetIs added to the third offset to obtain Rn。
S204, according to RnAnd RsAnd determining whether the adjacent cell is a reselection target cell.
And S205, if the adjacent cell is determined to be the reselection target cell, starting cell reselection.
The change of the embodiment to the same-frequency reselection is as follows: at RnIn the calculation of (2) by adding an offset, i.e. Rn＝Qmeas,n-Qoffset+Q1. Wherein Q is1That is, the third offset is used to represent an offset value of the neighboring cell with respect to the quality of the signal received by the monitoring ue, that is, the third offset only takes effect for the idle monitoring ue, that is, the reselection of the idle ue in the public network is not affected. Thus, at Qmeas,nAnd QoffsetIn fixed condition, R obtained by idle user equipment in public networksR obtained by monitoring user equipment in idle statenBy a third offset.
This embodiment calculates R in the R criterionnIn the process, compared with the existing calculation process, a third offset is added, so that the neighbor cell reselection threshold of the idle state monitoring user equipment is lower than the neighbor cell reselection threshold of the idle state user equipment in the public network, that is, the idle state monitoring user equipment starts cell reselection earlier than the idle state user equipment in the public network, so as to ensure the continuity of the monitoring service of the idle state monitoring user equipment.
In the above embodiment, S104 or S204 may include: judging whether the residence time of the user equipment in the service cell exceeds the preset time or not; if the residence time of the user equipment in the serving cell exceeds the preset time and within the preset detection time, RnIs always greater than RsIf yes, determining that the neighboring cell is a reselection target cell; or, if the residence time of the user equipment in the serving cell is less than the preset time, and/or within the preset detection time, R existsnIs less than or equal to RsAnd determining that the neighboring cell is not the reselection target cell.
The preset time may be 1 second, which is the same as the existing protocol, but the present invention is not limited thereto. In addition, the specific value of the preset detection time can also refer to, but is not limited to, the existing protocol.
On the basis of the foregoing embodiment, before S103, the cell reselection method may further include: and determining the neighbor cell with the best signal quality in the neighbor cells with the signal quality larger than that of the serving cell as the first neighbor cell. Accordingly, S103 may include: subtracting the bias from the signal quality of the first neighborSetting QoffsetTo obtain Rn。
Optionally, before S203, the cell reselection method may further include: and determining the neighbor cell with the best signal quality in the neighbor cells with the signal quality larger than that of the serving cell as a third neighbor cell. Accordingly, S203 may include: subtracting the offset Q from the signal quality of the third neighboring celloffsetIs added to the third offset to obtain Rn。
Fig. 3 is a flowchart of a third cell reselection method according to the present invention. The method may be performed by a cell reselection apparatus, which is integrated in a user equipment, and which may be implemented by means of hardware and/or software. As shown in fig. 3, the method includes:
s301, when the user equipment is in an idle state and the signal quality of the serving cell is less than that of the neighboring cell, obtaining a second offset of the serving cell, where the second offset is used to represent an offset value of the serving cell relative to the monitored user equipment, a central frequency point of the neighboring cell is different from a central frequency point of the serving cell, and a cell reselection priority of the neighboring cell is lower than a cell reselection priority of the serving cell.
S302, if a first condition is satisfied, determining that the adjacent cell is a reselection target cell, and starting cell reselection, wherein the first condition is that a signal level measurement value Srxlev of a service cell subtracts a second offset and then is smaller than a low priority reselection threshold Thresh of a first service frequency pointServing,LowPAnd the Srxlev of the adjacent region is larger than the first low priority reselection threshold value ThreshX,LowP。
Alternatively, S302 may further determine that the neighboring cell is a reselection target cell and start cell reselection if a second condition is satisfied, where the second condition is that after a signal quality measurement value Squal of the serving cell subtracts a second offset, the signal quality measurement value Squal is smaller than a low priority reselection threshold Thresh of a second serving frequency pointServing,LowQAnd the Squal of the neighboring cell is greater than the second low-priority reselection threshold value ThreshX,LowQ。
Specifically, in the prior art, for the case that the center frequency point of the serving cell and the center frequency point of the neighboring cell are different, the S criterion according to which the cell reselection is performed is as follows:
serving cell Srxlev<ThreshServing,LowP
Srxlev of adjacent region>ThreshX,LowP
Alternatively, the first and second electrodes may be,
squal of serving cell<ThreshServing,LowQ
Square of adjacent region>ThreshX,LowQ
And when the user equipment resides in the serving cell for more than 1 second and any one of the above conditions is kept in the preset detection time, the user equipment reselects the neighboring cell.
The change of the invention to the pilot frequency reselection is as follows: adding an offset to the serving cell's Srxlev or the serving cell's Squal, namely:
serving cell Srxlev-Qoffset,sc-ptm<ThreshServing,LowP
Srxlev of adjacent region>ThreshX,LowP
Alternatively, the first and second electrodes may be,
Squal-Q of serving celloffset,sc-ptm<ThreshServing,LowQ
Square of adjacent region>ThreshX,LowQ
Wherein Q isoffset,sc-ptmThat is, the second offset mentioned in the present invention is used to characterize an offset value of the serving cell with respect to the listening ue, that is, the second offset is only effective for the idle listening ue, that is, the reselection of the idle listening ue in the public network is not affected. Thus, the difference between the pilot frequency cell reselection threshold of the idle-state user equipment in the public network and the pilot frequency cell reselection threshold of the idle-state monitoring user equipment is a second offset.
It should be noted that the second offset is configured to the listening ue by the base station, and the specific value can be set according to an actual empirical value.
In the embodiment, in the process of determining the serving cell reselection threshold in the S criterion, compared with the existing calculation process, one second offset is subtracted, so that the serving cell reselection threshold of the idle monitor ue is higher than the serving cell reselection threshold of the idle ue in the public network, that is, the idle monitor ue starts cell reselection earlier than the idle ue in the public network, so as to ensure continuity of the monitored service of the idle monitor ue.
Alternatively, S302 may include: judging whether the residence time of the user equipment in the service cell exceeds the preset time or not; and if the residence time of the user equipment in the service cell exceeds the preset time and the first condition or the second condition is always satisfied within the preset detection time, determining that the adjacent cell is the reselection target cell. The preset time may be 1 second, which is the same as the existing protocol, but the present invention is not limited thereto. In addition, the specific value of the preset detection time can also refer to, but is not limited to, the existing protocol.
Further, in any of the above embodiments, the obtaining offsets (the first offset of the general serving cell, the second offset of the serving cell, and the third offset of the neighboring cell) may specifically be: receiving a system information block SIB20 issued by a base station, wherein the SIB20 carries the offset of an adjacent cell; or receiving a system information block SIB1 or SIB4 transmitted by the base station, wherein the extension field of the SIB1 or SIB4 carries the offset of the neighboring cell. Alternatively, the user equipment may store the offset in advance.
Fig. 4 is a schematic structural diagram of a cell reselection apparatus according to a first embodiment of the present invention. The apparatus is integrated in the user equipment, and the apparatus may be implemented by means of hardware and/or software. As shown in fig. 4, the cell reselection device 40 includes: an acquisition module 41, a calculation module 42, a determination module 43 and an activation module 44.
The obtaining module 41 is configured to obtain a first offset of the serving cell when the ue is in an idle state and the signal quality of the serving cell is less than that of the neighboring cell, where the first offset is used to represent an offset value of the serving cell with respect to the signal quality received by the ue, and a center frequency point of the neighboring cell is the same as a center frequency point of the serving cell, or the center frequency point of the neighboring cell is different from the center frequency point of the serving cell, but the priority of the neighboring cell is the same as the priority of the serving cell. The calculating module 42 is used for calculating the signal quality of the serving cell and the hysteresis QHystAndthen subtracting the first offset to obtain Rs(ii) a And subtracting the offset Q from the signal quality of the neighboring celloffsetTo obtain Rn. The determining module 43 is used for determining R obtained by the calculating module 42nAnd RsAnd determining whether the adjacent cell is a reselection target cell. The starting module 44 is configured to start cell reselection if the determining module 43 determines that the neighboring cell is the reselection target cell.
The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 1, and the implementation principle and the technical effect are similar, which are not described herein again.
Optionally, the determining module 43 may be specifically configured to: judging whether the residence time of the user equipment in the service cell exceeds the preset time or not; if the residence time of the user equipment in the serving cell exceeds the preset time and within the preset detection time, RnIs always greater than RsIf yes, determining that the neighboring cell is a reselection target cell; or, if the residence time of the user equipment in the serving cell is less than the preset time, and/or within the preset detection time, R existsnIs less than or equal to RsAnd determining that the neighboring cell is not the reselection target cell.
Further, the determining module 43 may be further configured to: and determining the neighbor cell with the best signal quality in the neighbor cells with the signal quality larger than that of the serving cell as the first neighbor cell. Accordingly, the calculation module 42 is configured to subtract the offset Q from the signal quality of the neighboring celloffsetTo obtain RnThe method specifically comprises the following steps: subtracting the offset Q from the signal quality of the first neighbor celloffsetTo obtain Rn。
Further, the obtaining module 41 may be specifically configured to: receiving a system information block SIB20 issued by a base station, wherein the SIB20 carries a first offset of a serving cell; or, receiving the system information block SIB1 or SIB4 issued by the base station, wherein the extension field of the SIB1 or SIB4 carries the first offset of the serving cell.
Fig. 5 is a schematic structural diagram of a second cell reselection device according to a second embodiment of the present invention. The apparatus is integrated in the user equipment, and the apparatus may be implemented by means of hardware and/or software. As shown in fig. 5, the cell reselection apparatus 50 includes: an acquisition module 51 and a processing module 52.
The obtaining module 51 is configured to obtain a second offset of the serving cell when the user equipment is in an idle state and the signal quality of the serving cell is smaller than that of the neighboring cell, where the second offset is used to represent an offset value of the serving cell relative to the monitored user equipment, a central frequency point of the neighboring cell is different from a central frequency point of the serving cell, and a cell reselection priority of the neighboring cell is lower than a cell reselection priority of the serving cell. The processing module 52 is configured to determine that the neighboring cell is a reselection target cell and start cell reselection if a first condition or a second condition is met, where the first condition is that a signal level measurement value Srxlev of the serving cell minus a second offset is smaller than a first serving frequency point low priority reselection threshold ThreshServing,LowPAnd the Srxlev of the adjacent region is larger than the first low priority reselection threshold value ThreshX,LowP(ii) a The second condition is that the signal quality measured value Squal of the service cell subtracts a second offset and is smaller than a low priority reselection threshold Thresh of a second service frequency pointServing,LowQAnd the Squal of the neighboring cell is greater than the second low-priority reselection threshold value ThreshX,LowQ。
The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 3, and the implementation principle and the technical effect are similar, which are not described herein again.
Optionally, the processing module 52 may be specifically configured to: judging whether the residence time of the user equipment in the service cell exceeds the preset time or not; and if the residence time of the user equipment in the service cell exceeds the preset time and the first condition or the second condition is always satisfied within the preset detection time, determining that the adjacent cell is the reselection target cell.
The obtaining module 51 may be specifically configured to: receiving a system information block SIB20 sent by a base station, wherein the SIB20 carries a second offset of a serving cell; or, receiving the extension field of the system information block SIB1 or SIB4, SIB1 or SIB4 sent by the base station, where the extension field carries the second offset of the serving cell.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units or modules is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or modules may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A cell reselection method applied to a wireless trunking communication system, the method comprising:
when user equipment is in an idle state and the signal quality of a serving cell is smaller than that of an adjacent cell, acquiring a first offset of the serving cell, wherein the first offset is used for representing an offset value of the serving cell relative to the signal quality received by monitoring the user equipment, and a central frequency point of the adjacent cell is the same as that of the serving cell, or the central frequency point of the adjacent cell is different from that of the serving cell but the priority of the adjacent cell is the same as that of the serving cell;
the signal quality and the hysteresis quantity Q of the serving cellHystAnd subtracting the first offset to obtain Rs；
Subtracting the bias Q from the signal quality of the neighboring celloffsetTo obtain Rn；
According to RnAnd RsDetermining whether the neighboring cell is a reselection target cell;
if the adjacent cell is determined to be a reselection target cell, cell reselection is started;
the obtaining the first offset of the serving cell includes:
receiving a system information block SIB20 issued by a base station, wherein the SIB20 carries a first offset of the serving cell;
or receiving a system information block SIB1 or SIB4 transmitted by the base station, where an extension field of the SIB1 or SIB4 carries the first offset of the serving cell.
2. The cell reselection method of claim 1, wherein said R isnAnd RsDetermining whether the neighboring cell is a reselection target cell, including:
judging whether the residence time of the user equipment in the serving cell exceeds preset time or not;
if the residence time of the user equipment in the service cell exceeds the preset time and within the preset detection time, RnIs always greater than RsDetermining that the neighboring cell is a reselection target cell;
or, if the user isThe residence time of the equipment in the serving cell is less than the preset time, and/or R exists in the preset detection timenIs less than or equal to RsAnd determining that the neighboring cell is not the reselection target cell.
3. The cell reselection method of claim 1 or 2, wherein the signal quality of the neighboring cell is subtracted by an offset QoffsetTo obtain RnBefore, still include:
determining a neighboring cell with the best signal quality in neighboring cells with the signal quality greater than that of the serving cell as a first neighboring cell;
correspondingly, subtracting the bias Q from the signal quality of the neighboring celloffsetTo obtain RnThe method comprises the following steps: subtracting the offset Q from the signal quality of the first neighboring celloffsetTo obtain Rn。
4. A cell reselection method applied to a wireless trunking communication system, the method comprising:
when user equipment is in an idle state and the signal quality of a serving cell is smaller than that of an adjacent cell, acquiring a second offset of the serving cell, wherein the second offset is used for representing an offset value of the serving cell relative to monitoring user equipment, a central frequency point of the adjacent cell is different from a central frequency point of the serving cell, and the cell reselection priority of the adjacent cell is lower than that of the serving cell;
if the first condition or the second condition is satisfied, determining that the neighboring cell is a reselection target cell, and starting cell reselection;
wherein the first condition is that the signal level measurement value Srxlev of the serving cell minus the second offset is smaller than a low priority reselection threshold Thresh of a first serving frequency pointServing,LowPAnd the Srxlev of the adjacent cell is greater than a first low priority reselection threshold value ThreshX,LowP；
The second condition is that the signal quality measurement value of the serving cell, Squal, is subtracted by theAfter the second offset, the value is less than the low priority reselection threshold Thresh of the second service frequency pointServing,LowQAnd the Squal of the neighboring cell is greater than a second low-priority reselection threshold ThreshX,LowQ；
The obtaining of the second offset of the serving cell includes:
receiving a system information block SIB20 sent by a base station, wherein the SIB20 carries a second offset of the serving cell;
or receiving a system information block SIB1 or SIB4 transmitted by the base station, where an extension field of the SIB1 or SIB4 carries the second offset of the serving cell.
5. The cell reselection method of claim 4, wherein the determining that the neighboring cell is a reselection target cell if the first condition or the second condition is met comprises:
judging whether the residence time of the user equipment in the serving cell exceeds preset time or not;
and if the residence time of the user equipment in the serving cell exceeds the preset time and the first condition or the second condition is always satisfied within the preset detection time, determining that the neighboring cell is a reselection target cell.
6. A cell reselection apparatus, applied to a wireless trunking communication system, the apparatus comprising:
an obtaining module, configured to obtain a first offset of a serving cell when a user equipment is in an idle state and a signal quality of the serving cell is less than a signal quality of an adjacent cell, where the first offset is used to represent an offset value of the serving cell with respect to a signal quality received by a monitoring user equipment, and a center frequency point of the adjacent cell is the same as a center frequency point of the serving cell, or the center frequency point of the adjacent cell is different from the center frequency point of the serving cell but the priorities of the adjacent cell and the serving cell are the same;
a calculating module, configured to calculate the signal quality and the hysteresis Q of the serving cellHystAnd, thenSubtracting the first offset to obtain Rs(ii) a And subtracting the bias Q from the signal quality of the neighboring celloffsetTo obtain Rn；
A determining module for determining R obtained by the calculating modulenAnd RsDetermining whether the neighboring cell is a reselection target cell;
a starting module, configured to start cell reselection if the determining module determines that the neighboring cell is a reselection target cell;
the acquisition module is specifically configured to:
receiving a system information block SIB20 issued by a base station, wherein the SIB20 carries a first offset of the serving cell;
or receiving a system information block SIB1 or SIB4 transmitted by the base station, where an extension field of the SIB1 or SIB4 carries the first offset of the serving cell.
7. The cell reselection apparatus of claim 6, wherein the determining module is specifically configured to:
judging whether the residence time of the user equipment in the serving cell exceeds preset time or not;
if the residence time of the user equipment in the service cell exceeds the preset time and within the preset detection time, RnIs always greater than RsDetermining that the neighboring cell is a reselection target cell;
or, if the residence time of the user equipment in the serving cell is less than the preset time, and/or within the preset detection time, R existsnIs less than or equal to RsAnd determining that the neighboring cell is not the reselection target cell.
8. The cell reselection apparatus of claim 6 or 7, wherein the determining module is further configured to:
determining a neighboring cell with the best signal quality in neighboring cells with the signal quality greater than that of the serving cell as a first neighboring cell;
accordingly, the computing module is configured to use theSignal quality of neighbor minus offset QoffsetTo obtain RnThe method specifically comprises the following steps: subtracting the offset Q from the signal quality of the first neighboring celloffsetTo obtain Rn。
9. A cell reselection apparatus, applied to a wireless trunking communication system, the apparatus comprising:
an obtaining module, configured to obtain a second offset of a serving cell when a user equipment is in an idle state and a signal quality of the serving cell is less than a signal quality of an adjacent cell, where the second offset is used to represent an offset value of the serving cell relative to a monitored user equipment, a central frequency point of the adjacent cell is different from a central frequency point of the serving cell, and a cell reselection priority of the adjacent cell is lower than a cell reselection priority of the serving cell;
the processing module is used for determining the adjacent cell as a reselection target cell and starting cell reselection if the first condition or the second condition is met;
wherein the first condition is that the signal level measurement value Srxlev of the serving cell minus the second offset is smaller than a low priority reselection threshold Thresh of a first serving frequency pointServing,LowPAnd the Srxlev of the adjacent cell is greater than a first low priority reselection threshold value ThreshX,LowP；
The second condition is that the signal quality measurement value Squal of the service cell is less than a low priority reselection threshold Thresh of a second service frequency point after subtracting the second offset from the signal quality measurement value Squal of the service cellServing,LowQAnd the Squal of the neighboring cell is greater than a second low-priority reselection threshold ThreshX,LowQ；
The acquisition module is specifically configured to:
receiving a system information block SIB20 sent by a base station, wherein the SIB20 carries a second offset of the serving cell;
or receiving a system information block SIB1 or SIB4 transmitted by the base station, where an extension field of the SIB1 or SIB4 carries the second offset of the serving cell.
10. The cell reselection device of claim 9, wherein the processing module is specifically configured to:
judging whether the residence time of the user equipment in the serving cell exceeds preset time or not;
and if the residence time of the user equipment in the serving cell exceeds the preset time and the first condition or the second condition is always satisfied within the preset detection time, determining that the neighboring cell is a reselection target cell.
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| CN110381546B (en) * | 2018-04-13 | 2021-07-16 | ***通信有限公司研究院 | Cell reselection method, terminal and network equipment |
| CN108882321B (en) * | 2018-06-13 | 2021-01-29 | Oppo广东移动通信有限公司 | Cell reselection method, terminal and computer readable storage medium |
| CN110636539B (en) | 2018-06-25 | 2021-07-16 | 维沃移动通信有限公司 | Resource configuration method, mobile terminal, network side device and medium |
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| CN101572921B (en) * | 2008-04-29 | 2013-07-31 | 株式会社Ntt都科摩 | Method and device for cell reselection in mobile communication system |
| CN101686505B (en) * | 2008-09-23 | 2012-06-06 | 华为技术有限公司 | Method and device for reelecting cells |
| US20120113846A1 (en) * | 2010-11-10 | 2012-05-10 | Motorola Mobility, Inc. | Idle State Interference Mitigation in Wireless Communication Network |
| CN102740389B (en) * | 2012-06-28 | 2015-09-09 | 华为技术有限公司 | A kind of residence reselecting, equipment and system supporting multi-media broadcasting service |
| WO2015116870A1 (en) * | 2014-01-29 | 2015-08-06 | Interdigital Patent Holdings, Inc. | Method and apparatus for implementing coverage enhancement (ce) operations |
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| CN105282807A (en) * | 2014-07-21 | 2016-01-27 | 深圳市中兴微电子技术有限公司 | Trunking terminal and cell switching method and device thereof |
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