CN108924891B - Cell determination method, user equipment and device with storage function - Google Patents
Cell determination method, user equipment and device with storage function Download PDFInfo
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- CN108924891B CN108924891B CN201810948955.8A CN201810948955A CN108924891B CN 108924891 B CN108924891 B CN 108924891B CN 201810948955 A CN201810948955 A CN 201810948955A CN 108924891 B CN108924891 B CN 108924891B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/04—Reselecting a cell layer in multi-layered cells
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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
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
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Abstract
The invention discloses a cell determining method, user equipment and a device with a storage function. The cell determination method comprises the following steps: the user equipment is in an idle state; and when detecting that the communication quality of the adjacent cell is higher than that of the current cell and the priority of the adjacent cell meets a preset condition, switching to an active state and switching from the current cell to the adjacent cell within the validity period of the priority parameter. By the mode, the communication quality of the user equipment can be effectively improved, so that the user experience is improved.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a cell determination method, a user equipment, and a device having a storage function.
Background
In an LTE (Long Term Evolution) communication network, under the condition that the validity period of the priority parameter is Long, if the communication quality of the current cell in which the user resides is poor, and the communication quality of the neighboring cell is good but the proprietary priority is low, the user equipment cannot reside in the neighboring cell through cell reselection, so that the communication quality of the current user equipment and the user equipment in an active state in the same place is greatly different, and the user experience is affected.
Disclosure of Invention
The technical problem mainly solved by the present invention is to provide a cell determining method, a user equipment and a device with a storage function, which can effectively improve the communication quality of the user equipment and improve the user experience.
In order to solve the technical problems, the invention adopts a technical scheme that: provided is a cell determination method including: the user equipment is in an idle state; and when detecting that the communication quality of the adjacent cell is higher than that of the current cell and the priority of the adjacent cell meets a preset condition, switching to an active state, and switching to the adjacent cell from the current cell when the validity period of the priority parameter is not reached.
Wherein the preset conditions include: the dedicated priority of the neighboring cell is lower than the dedicated priority of the current cell, and the universal priority of the neighboring cell is higher than or equal to the universal priority of the current cell.
When it is detected that the communication quality of the neighboring cell is higher than that of the current cell and the priority of the neighboring cell meets a preset condition, switching to an active state includes: detecting the communication quality of adjacent cells in a first adjacent cell set, and judging whether a second adjacent cell set with the communication quality of the adjacent cells higher than that of the current cell exists in the first adjacent cell set; if the second adjacent cell set exists, judging whether a third adjacent cell set with the special priority of the adjacent cell lower than that of the current cell exists in the second adjacent cell set; if the third adjacent cell set exists, judging whether a fourth adjacent cell set with the common priority of the adjacent cells higher than or equal to the common priority of the current cell exists in the third adjacent cell set; and if the fourth adjacent cell set exists, switching to an activated state.
Wherein the method further comprises: when detecting that the communication quality of a neighboring cell is higher than that of a current cell and the special priority of the neighboring cell is lower than or equal to that of the current cell, performing cell reselection to reside in the neighboring cell; and/or if the communication quality of the adjacent cell is not detected to be higher than that of the current cell, or the communication quality of the adjacent cell is detected to be higher than that of the current cell and the universal priority of the adjacent cell is lower than that of the current cell, cell reselection is not performed.
Wherein the switching from the current cell to the neighboring cell when the validity period of the priority parameter is not reached comprises: receiving measurement control issued by a current cell; responding to the measurement control to report a measurement report to the current cell; and establishing connection with one adjacent cell according to RRC connection reconfiguration issued by the current cell, wherein the adjacent cell for establishing connection is the adjacent cell with the best communication quality in the adjacent cells with the priorities meeting the preset conditions.
Wherein the step of transitioning to an active state comprises: the user equipment actively initiates a data connection or is directly configured to be in an activated state.
Wherein the method further comprises: if the communication quality of the adjacent cell is not detected to be higher than that of the current cell, the communication quality of the adjacent cell is repeatedly detected within the validity period of the priority parameter until the communication quality of the adjacent cell is detected to be higher than that of the current cell; and/or if the communication quality of a neighboring cell is detected to be lower than the communication quality of the current cell for a plurality of times, then the communication quality of the neighboring cell is not detected subsequently.
Wherein the method further comprises: and receiving a radio resource control release message, and acquiring the special priority of at least one adjacent cell and the special priority of the current cell from the radio resource control release message.
In order to solve the technical problem, the invention adopts another technical scheme that: there is provided a user equipment comprising: a processor, a memory, a communication circuit, the processor coupled to the memory and the communication circuit; wherein the memory is for storing program instructions for implementing the cell determination method as described above; the processor and the communication circuitry are configured to execute the program instructions stored by the memory to implement the cell determination method as described above.
In order to solve the technical problem, the invention adopts another technical scheme that: there is provided an apparatus having a storage function, storing program instructions executable to implement the steps in the method as described above.
The invention has the beneficial effects that: different from the situation of the prior art, when the user equipment detects that the adjacent cell with the communication quality higher than that of the current cell exists and the priority of the adjacent cell meets the preset condition, the user equipment is switched from the idle state to the active state, and the user equipment in the active state can perform cell switching to switch to the adjacent cell with the communication quality higher than that of the current cell, so that the user equipment can effectively improve the communication quality of the user equipment without waiting for the validity period of the priority parameter to be invalid and can be switched to the adjacent cell with the communication quality within the validity period of the priority parameter, and the user experience is improved.
Drawings
Fig. 1 is a flowchart illustrating a first embodiment of a cell determination method according to the present invention;
fig. 2 is a flowchart illustrating an embodiment of a method for transitioning to an active state when detecting that there exists a neighboring cell whose communication quality and priority both meet the conditions in the cell determination method provided in the present invention;
fig. 3 is a flowchart illustrating an embodiment of a method for switching from a current cell to a neighboring cell within a validity period of a priority parameter in the cell determination method provided in the present invention;
fig. 4 is a flowchart illustrating a cell determination method according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of an embodiment of a ue provided in the present invention;
fig. 6 is a schematic structural diagram of an embodiment of an apparatus with a storage function according to the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a cell determination method according to a first embodiment of the present invention. The cell determining method provided by the invention comprises the following steps:
s101: the user equipment is in an idle state;
in a specific implementation scenario, when the ue is in a power-on state but does not establish an RRC (Radio Resource Control) connection with the Radio network, the ue is called in an idle state. When the user equipment is in an idle state, cell reselection can be performed, wherein the cell reselection refers to selecting a better cell to camp according to a cell reselection rule after the user equipment selects the cell to camp, so as to ensure that the system message is correctly received and the service is successfully initiated.
In this implementation scenario, the ue will be in an idle state periodically after selecting the current cell to camp on, i.e., a connection channel with the wireless network is disconnected periodically, and in other implementation scenarios, the ue may be changed to the idle state after not initiating a service for a long time.
S102: and when detecting that the communication quality of the adjacent cell is higher than that of the current cell and the priority of the adjacent cell meets a preset condition, switching to an active state and switching from the current cell to the adjacent cell within the validity period of the priority parameter.
In a specific implementation scenario, since the ue reselects to select a better cell to camp on, when performing cell reselection, the ue first determines whether the communication quality of the neighboring cell is higher than that of the current cell according to the communication quality of the current cell and the communication quality of the neighboring cell. In this implementation scenario, if the communication quality of the neighboring cell is higher than the communication quality of the current cell, it is determined whether the priority of the neighboring cell whose communication quality is higher than the communication quality of the current cell meets a preset condition, where in this implementation scenario, the preset condition is that the dedicated priority of the neighboring cell is lower than the dedicated priority of the current cell, and the universal priority of the neighboring cell is higher than or equal to the universal priority of the current cell. In other implementation scenarios, the preset condition may be that the universal priority of the neighboring cell is higher than the dedicated priority of the neighboring cell, or may be that the universal priority of the neighboring cell is higher than the universal priority of the current cell and higher than the dedicated priority of the neighboring cell.
Because the neighboring cell whose priority satisfies the preset condition does not satisfy the cell reselection rule, the neighboring cell cannot be used as a reselected cell of the user equipment, that is, when the user equipment is in an idle state, the user equipment cannot camp on the neighboring cell with better communication quality because the neighboring cell cannot satisfy the cell reselection rule within the validity period of the priority parameter. In this embodiment, in order to avoid that the ue needs to wait for the priority parameter to expire before camping on the neighboring cell with better communication quality, so that the ue can only camp on the current cell with poor communication quality within the validity period of the priority parameter, the ue is switched to the active state, and when the ue is in the active state, the ue performs cell handover through control of the base station so that the ue can camp on the neighboring cell with better communication quality within the validity period of the priority parameter.
Specifically, please refer to fig. 2, fig. 2 is a flowchart illustrating an embodiment of a method for transitioning to an active state when detecting that there exists a neighboring cell whose communication quality and priority both meet the conditions in the cell determination method according to the present invention. The method for switching to the activated state when the cell determining method detects that the adjacent cells with the communication quality and the priority meeting the conditions exist comprises the following steps:
s201: communication qualities of neighboring cells in the first set of neighboring cells are detected.
In a specific implementation scenario, the ue detects communication quality of all neighboring cells, and sets a set of all neighboring cells as a first set of neighboring cells. In other implementation scenarios, several neighboring cells may be designated by the base station of the current cell as the first neighboring cell set, or the user equipment may select several cells from all neighboring cells as the first neighboring cell set. The neighboring cells in the first set of neighboring cells may be neighboring cells in a neighboring cell list or neighboring cells detected during a cell reselection procedure.
In this implementation scenario, whether the communication quality of the neighboring cell is higher than that of the current cell is determined by comparing RSRP (Reference Signal Received Power) of the current cell and the neighboring cell, where the RSRP ranges from-44 dBm to-140 dBm, and the larger the value, the better the communication quality. In other implementation scenarios, the RSRQ (Reference Signal Received Quality) of the current cell and the RSRQ of the neighboring cells may be compared, where the RSRQ ranges from-3 to-19.5, and the larger the value, the better the communication Quality is. In other implementation scenarios, SINR (Signal to Interference plus Noise Ratio), RSSI (Received Signal Strength Indication), and the like may be measured and compared.
S202: and judging whether a second adjacent cell set with the communication quality of the adjacent cell higher than that of the current cell exists in the first adjacent cell set.
In a specific implementation scenario, if there exists a second neighboring cell set in the first neighboring cell set, where the communication quality of the neighboring cell is higher than that of the current cell, step S202 is performed. In another implementation scenario, the communication quality of all neighboring cells in the first set of neighboring cells is lower than or equal to the communication quality of the current cell, and the user equipment continues to camp on the current cell.
In another implementation scenario, if the communication quality of all the neighboring cells in the first set of neighboring cells is lower than or equal to the communication quality of the current cell, the communication quality of the neighboring cells in the first set of neighboring cells is repeatedly measured within the validity period of the priority parameter in consideration of the mobility of the user equipment until it is detected that the communication quality of the neighboring cells is higher than the communication quality of the current cell. Due to the mobility of the ue, the neighboring cells in the first set of neighboring cells may be changed, for example, if the communication quality of a neighboring cell is detected to be lower than the communication quality of the current cell for a plurality of consecutive times (e.g., 3 times, 5 times, etc.), the communication quality of the neighboring cell is not detected any more subsequently; or if the communication quality of a neighboring cell is detected to be lower than a preset threshold (e.g. the lowest value required for normal communication) for a plurality of times (e.g. 3 times, 5 times, etc.) continuously and the result of the plurality of measurements is continuously deteriorated, the communication quality of the neighboring cell is not detected any more subsequently.
S203: and if the second adjacent cell set exists, judging whether the special priority of the adjacent cells in the second adjacent cell set is lower than that of the current cell.
In a specific implementation scenario, if there is a second neighboring cell set of neighboring cells having a higher communication quality than the current cell in the first neighboring cell set, it is determined whether the dedicated priorities of the neighboring cells of the second neighboring cell set are all lower than the dedicated priority of the current cell. And if the special priority of the adjacent cells in the second adjacent cell set is lower than that of the current cell, the adjacent cells in the second adjacent cell set do not meet the cell reselection rule.
In other implementation scenarios, if the dedicated priority of the neighboring cell existing in the second set of neighboring cells is higher than or equal to the dedicated priority of the current cell, the neighboring cell satisfies the cell reselection rule, and performs cell reselection to camp on the neighboring cell. And if the special priority of a plurality of adjacent cells is higher than or equal to the special priority of the current cell, selecting the adjacent cell with the best communication quality from the adjacent cells as the reselection cell.
In this implementation scenario, the user equipment acquires the universal priority of each cell by using the cell broadcast message, and the universal priority is set by using the parameter CellReselPriority. The ue obtains the dedicated priority of each cell in an RRC (Radio Resource Control) release message. The special Priority is directly generated through a special Priority algorithm in the system, the special Priority can also be determined by the parameter Priority, and the special Priority is only valid within the validity period of the Priority parameter. The validity period of the priority parameter is issued by an RRC (Radio Resource Control) release message. If dedicated priorities are provided, the user equipment will ignore all generic priorities.
S204: and if the special priorities of the adjacent cells in the second adjacent cell set are all lower than the special priority of the current cell, judging whether a third adjacent cell set with the common priority of the adjacent cell higher than or equal to the common priority of the current cell exists in the second adjacent cell set.
In a specific real-time scenario, if the dedicated priorities of the neighboring cells in the second neighboring cell set are all lower than the dedicated priority of the current cell, it is determined whether a third neighboring cell set exists in the second neighboring cell set, where the common priority of the neighboring cells is higher than or equal to the common priority of the current cell. The adjacent cells in the second adjacent cell set do not meet the cell reselection rule, and when the user equipment is in an idle state, a proper cell cannot be selected as a reselected cell, and only the current cell with poor communication quality can be continuously resided.
When the user equipment is in an activated state, the special priority of the current cell and the special priority of the adjacent cell are invalid, so that only the universal priority of the current cell and the universal priority of the adjacent cell are compared. If the universal priority of the adjacent cells in the second adjacent cell set is higher than or equal to the universal priority of the current cell, the ue may be handed over to an adjacent cell to camp on when the ue is in the active state.
In other implementation scenarios, the general priorities of the neighboring cells summarized by the second neighboring cell set are all lower than the general priority of the current cell, and even if the ue transitions to the active state, the ue cannot switch to any cell for camping. Therefore, if the general priorities of the neighboring cells summarized by the second neighboring cell set are all lower than the general priority of the current cell, the ue continues to camp on the current cell.
S205: and if the third adjacent cell set exists, switching to an activated state.
In this implementation scenario, a third neighboring cell set exists, which indicates that when the ue is in an active state, the ue may switch to an active state if the ue camps on a neighboring cell with better communication quality through cell switching. In this implementation scenario, a cell with the best communication quality is selected from the third neighboring cell set as a cell where the ue resides after handover.
In this implementation scenario, the user equipment is switched to the active state by actively initiating a data connection, and in other implementation scenarios, the user equipment may be directly configured to the active state.
In this implementation scenario, after the ue switches to the active state, the ue switches from the current cell to the neighboring cell for residence within the validity period of the priority parameter through cell switching. Specifically, please refer to fig. 3 in combination, fig. 3 is a flowchart illustrating an embodiment of a method for switching from a current cell to a neighboring cell within a validity period of a priority parameter in the cell determination method according to the present invention. The method for switching from the current cell to the adjacent cell within the validity period of the priority parameter in the cell determination method provided by the invention comprises the following steps:
s301: and receiving measurement control issued by the base station of the current cell.
In a specific implementation scenario, the ue has switched to an active state, the base station of the current cell sends measurement control to the ue, and notifies the ue of a measurement configuration message through a measConfig cell carried in the rrcconnectionreconfiguration message, where the measurement configuration message includes an object to be measured by the ue, a cell list, a reporting mode, a measurement identifier, an event parameter, and the like. In this implementation scenario, the base station may use one measurement control to designate the ue to measure one or more cells in the third set of neighboring cells. For example, a cell having the best communication quality may be specified, or all the neighboring cells in the third neighboring cell set may be specified.
S302: and responding to the measurement control to report a measurement report to the base station of the current cell.
In a specific implementation scenario, the ue measures the neighboring cells designated by the base station in response to the measurement control, where the measured value includes at least one of RSRP, RSRQ, and Pathloss. The user equipment reports the measurement report to the base station of the current cell by filling the measurement result into a MeasurementReport message. In this implementation scenario, the measurement report includes the measurement identifier, the measurement results of the current cell and the neighboring cells. The measurement report may be sent periodically or event-triggered.
S303: and establishing connection with one adjacent cell according to RRC connection reconfiguration issued by the current cell base station, wherein the adjacent cell with the established connection is the adjacent cell with the best communication quality in the adjacent cells with the priorities meeting the preset conditions.
In a specific implementation scenario, the base station makes a decision for handover of the ue based on the measurement report and the radio resource management information. When the base station considers that the handover is necessary, a suitable adjacent cell is determined as the cell where the user equipment resides after the handover. In this implementation scenario, the neighboring cell is a cell with the best communication quality among neighboring cells whose priorities meet a preset condition, that is, a cell with the best communication quality in the third neighboring cell set.
In this implementation scenario, after the base station selects the neighboring cell, the current cell generates an RRCConnectionReconfiguration message carrying IE mobility control info from parameters required by the ue to access the selected neighboring cell during handover, and sends the RRCConnectionReconfiguration message to the ue to perform handover operation. The RRCConnectionReconfiguration information includes radio resource and physical resource configuration such as cell ID, carrier frequency, target power, and the like.
After receiving the RRCConnectionReconfiguration message containing the IE MobilityControlInfo, the ue interrupts the connection with the current cell and starts establishing a new connection with the selected neighboring cell, during which time the data transmission is interrupted. The method comprises the steps of downlink synchronization establishment, timing advance, data transmission and the like. And when the user equipment is successfully accessed to the selected adjacent cell, the user equipment sends RRC connection reconfiguration completion information to the target cell to indicate that the switching process is completed for the user equipment.
In this embodiment, the ue transitions to the active state and switches to the neighboring cell during the validity period of the priority parameter. Because the exclusive priority fails after the validity period of the priority parameter fails, the user equipment can select a neighboring cell with the priority meeting the preset condition as the reselected cell when the user equipment is in an idle state.
As can be seen from the above description, in this embodiment, when the ue is in the idle state, it is detected that the communication quality of the neighboring cell is higher than that of the current cell, and the dedicated priority of the neighboring cell does not satisfy the cell reselection rule, and the general priority satisfies the cell handover rule, the idle state is switched to the active state, and at this time, the ue in the active state can perform cell handover to switch to the neighboring cell with the communication quality higher than that of the current cell, and switch to the neighboring cell within the validity period of the priority parameter, so as to avoid that the ue needs to stay in the current cell with poor communication quality within the validity period of the priority parameter, and can quickly complete handover when finding the neighboring cell with high communication quality, thereby effectively improving the communication quality of the ue, and improving the conversation experience of the ue.
Referring to fig. 4, fig. 4 is a flowchart illustrating a cell determining method according to a second embodiment of the present invention. The cell determining method provided by the invention comprises the following steps:
s401: and the user equipment receives the RRC release message sent by the current cell.
In a specific implementation scenario, the ue acquires the dedicated priority of each cell in an RRC (Radio Resource Control) release message. The special Priority is directly generated through a special Priority algorithm in the system, the special Priority can also be determined by the parameter Priority, and the special Priority is only valid within the validity period of the Priority parameter. The validity period of the priority parameter is issued by an RRC (Radio Resource Control) release message.
The ue is in an idle state at this time, and when the ue is in an on state but does not establish an RRC (Radio Resource Control) connection with the Radio network, the ue is called as being in an idle state. When the user equipment is in an idle state, cell reselection can be performed, wherein the cell reselection refers to selecting a better cell to camp according to a cell reselection rule after the user equipment selects the cell to camp, so as to ensure that the system message is correctly received and the service is successfully initiated.
S402: the user equipment measures the communication quality of the current cell and the communication quality of the neighboring cell.
In a specific implementation scenario, the ue measures RSRP (Reference Signal Received Power of downlink Reference Signal) of the current cell and the neighboring cells
The value range of the RSRP is-44 dBm to-140 dBm, and the larger the value is, the better the communication quality is. In other implementation scenarios, the RSRQ (Reference Signal) of the current cell and the neighboring cells may also be measured
Received Quality, reference signal Received Quality), the range of RSRQ ranges from-3 to-19.5, the larger the value is, the better the communication Quality is. In other implementation scenarios, SINR (Signal to Interference plus Noise Ratio), RSSI (Received Signal Strength Indication), and the like may be measured and compared.
S403: the user equipment determines that the communication quality of the neighboring cell is higher than that of the current cell.
In a specific implementation scenario, if the RSRP of the neighboring cell is higher than the RSRP of the current cell, the ue determines that the communication quality of the neighboring cell is higher than that of the current cell, and the ue may reselect or handover to the neighboring cell.
In other implementation scenarios, if the communication quality of the neighboring cell is lower than the communication quality of the current cell, the ue does not perform reselection or handover and continues to camp on the current cell.
S404: the user equipment determines that the dedicated priority of the neighboring cell is lower than the dedicated priority of the current cell.
In a specific implementation scenario, since the ue determines that the dedicated priority of the neighboring cell is lower than the dedicated priority of the current cell, the ue does not satisfy the rule of cell reselection and cannot perform cell reselection.
In other implementation scenarios, if the dedicated priority of the neighboring cell is higher than or equal to the dedicated priority of the current cell, the neighboring cell may be used as a reselecting cell, and the idle ue reselects to the neighboring cell.
S405: the user equipment determines that the universal priority of the neighboring cell is higher than or equal to the universal priority of the current cell.
In a specific implementation scenario, when the ue camps on the current cell, the ue obtains the universal priority of each cell through a cell broadcast message, where the universal priority is set by using a parameter CellReselPriority. And if the universal priority of the adjacent cell is higher than or equal to that of the current cell, the rule of cell switching is met, and when the user equipment is in an activated state, the adjacent cell can be switched to.
In other implementation scenarios, the universal priority of the neighboring cell is lower than the universal priority of the current cell, and the ue will not switch to the neighboring cell even though the ue is in an active state, so the ue continues to camp on the current cell.
S406: the user equipment transitions to the active state.
In a specific implementation scenario, it is determined that the neighboring cell can satisfy the handover condition via step S405, and in order to enable the ue to camp on the neighboring cell with better communication quality, the ue switches to the active state. In this implementation scenario, the user equipment is switched to the active state by actively initiating a data connection, and in other implementation scenarios, the user equipment may be directly configured to the active state.
S407: the user equipment is controlled by the base station and is switched to the adjacent cell.
When the user equipment is in an activated state, the user equipment receives measurement control issued by a base station of the current cell, responds to the measurement control, reports a measurement report to the base station of the current cell, reconfigures according to RRC connection issued by the base station of the current cell, and establishes connection with the adjacent cell.
As can be seen from the above description, in this embodiment, when detecting an adjacent cell with a communication quality higher than that of a current cell, the user equipment in an idle state in this embodiment determines whether a dedicated priority of the adjacent cell meets a reselection rule, if the dedicated priority meets the reselection rule, the user equipment keeps the idle state and reselects to the adjacent cell, if the dedicated priority does not meet the reselection rule, the user equipment determines whether the cell meets a handover rule, if the handover rule is met, the user equipment switches to an active state, and the base station controls the user equipment to switch to the adjacent cell.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a ue according to an embodiment of the present invention. The user equipment 10 comprises a processor 11, a memory 12 and a communication circuit 13 coupled to each other, the memory 12 being configured to store program data, the processor 11 in combination with the communication circuit 13 being configured to execute the program data in the memory 12 to communicate and perform the following methods:
when the ue is in the idle state, the processor 11 detects the communication quality of the neighboring cells in the first neighboring cell set through the communication circuit 13, and the processor 11 determines whether a second neighboring cell set exists in the first neighboring cell set, where the communication quality of the neighboring cells is higher than that of the current cell. In this implementation scenario, the first neighboring cell set includes cells in a neighboring cell list, and in other implementation scenarios, the first neighboring cell set includes all neighboring cells that can be detected by the user equipment, or a base station of the current cell may designate a plurality of neighboring cells as the first neighboring cell set, or the user equipment may select a plurality of cells from all neighboring cells as the first neighboring cell set.
If the second neighboring cell set does not exist in the first neighboring cell set, that is, the communication quality of all neighboring cells in the first neighboring cell set is lower than that of the current cell, the processor 11 determines not to perform cell reselection, and the ue continues to camp on the current cell. In other implementation scenarios, in consideration of mobility of the user equipment, the processor 11 controls the communication circuit 13 to repeatedly measure communication qualities of neighboring cells in the first set of neighboring cells until it is detected that there is a neighboring cell whose communication quality is higher than that of the current cell, within the validity period of the priority parameter. Due to the mobility of the user equipment, the neighboring cells in the first set of neighboring cells may be changed, for example, if the processor 11 detects, through the communication circuit 13, that the communication quality of a neighboring cell is lower than that of the current cell for a plurality of consecutive times (e.g., 3 times, 5 times, etc.), the processor 11 controls the communication circuit 13 to subsequently no longer detect the communication quality of the neighboring cell; or the processor 11 controls the communication circuit 13 to detect that the communication quality of a neighboring cell is lower than a preset threshold (e.g. the lowest value required for normal communication) for a plurality of times (e.g. 3 times, 5 times, etc.) continuously, and the result of the plurality of measurements continuously deteriorates, then the processor 11 controls the communication circuit 13 to detect the communication quality of the neighboring cell no longer subsequently.
If the processor 11 determines that the second neighboring cell set exists in the first neighboring cell set, it indicates that the ue can camp on a cell in the second neighboring cell set through reselection or handover, i.e. camp on a neighboring cell with higher communication quality than the current cell. Processor 11 detects the dedicated priorities of the neighboring cells in the second set of neighboring cells via communication circuit 13 and determines whether the dedicated priorities of the neighboring cells in the second set of neighboring cells are both the dedicated priority of the first current cell.
If the processor 11 determines that the dedicated priority of the neighboring cell existing in the second set of neighboring cells is higher than or equal to the dedicated priority of the current cell, the processor 11 determines that the neighboring cell can be used as a reselecting cell of the user equipment, and the user equipment can reselect to the neighboring cell in an idle state. If the dedicated priority of a plurality of neighboring cells in the second neighboring existing set is higher than or equal to the dedicated priority of the current cell, the processor 11 detects the communication quality of these neighboring cells through the communication circuit 13, and selects a cell with the best communication quality from these neighboring cells as the reselection cell for the user equipment.
If the processor 11 determines that the dedicated priorities of all the neighboring cells in the second neighboring cell set are lower than the dedicated priority of the current cell, all the neighboring cells in the second cell set do not satisfy the cell reselection rule, and if the user equipment wants to camp on the neighboring cells in the second cell set, the user equipment needs to be switched to the active state. However, when the ue is in the active state, the handover cell still needs to satisfy the condition that the universal priority of the handover neighboring cell is higher than the universal priority of the current cell. Therefore, the processor 11 obtains the common priority of the neighboring cells in the second neighboring cell set through the communication electronics 13, and determines whether there is a third neighboring cell set in the second neighboring cell set in which the common priority of the neighboring cells is higher than the common priority of the current cell.
If the processor 11 determines that the universal priorities of the neighboring cells in the second neighboring cell set are all lower than the universal priority of the current cell, the handover condition is not satisfied, and the ue continues to camp on the current cell without being switched to the active state.
If the processor 11 determines that a third neighboring cell set, in which the universal priority of the neighboring cell is higher than the universal priority of the current cell, exists in the second neighboring cell set and the handover condition is satisfied, the ue 10 switches to the active state, and may perform a handover operation, and the base station controls the handover to an adjacent cell in the third neighboring cell set.
Specifically, after the ue 10 is switched to the active state, the base station of the current cell sends measurement control to the communication circuit 13 of the ue 10, where the measurement control includes an object to be measured by the ue, a cell list, a reporting mode, a measurement identifier, an event parameter, and the like. The processor 11 of the user equipment 10 controls, in response to the measurement, to measure, by the communication circuit 13, the neighbor cell specified by the base station, the measured value including at least one of RSRP, RSRQ, and Pathloss. The processor 11 of the user equipment 10 fills the measurement result into a MeasurementReport message and reports the measurement report to the base station of the current cell through the communication circuit 13. The measurement report includes measurement identities, measurement results of the current cell and the neighboring cells.
And the base station makes the decision of the user equipment switching based on the measurement report and the radio resource management information. When the base station considers that the handover is necessary, a suitable adjacent cell is determined as the cell where the user equipment resides after the handover. The handover command is an RRCConnectionReconfiguration message carrying the IE mobilityControlInfo. After the communication circuit 13 of the user equipment 10 receives the RRCConnectionReconfiguration message, the processor 13 interrupts the connection with the current cell according to the content of the message, and starts establishing a new connection with the selected neighboring cell through the communication circuit 13, during which time the data transmission is interrupted. The method comprises the steps of downlink synchronization establishment, timing advance, data transmission and the like. When the ue 10 successfully accesses the selected neighboring cell, the processor 11 of the ue 10 controls the communication circuit 13 to send an RRC connection reconfiguration complete message to the target cell to indicate that the handover procedure is completed for the ue.
The specific processes of the processor 11 and the communication circuit 13 for implementing the above functions may refer to the above method embodiments.
As can be seen from the above description, in this embodiment, when detecting an adjacent cell having a communication quality higher than that of a current cell, the user equipment in an idle state in this embodiment determines whether a dedicated priority of the adjacent cell meets a reselection rule, if the dedicated priority of the adjacent cell meets the reselection rule, the user equipment keeps the idle state and reselects to the adjacent cell, if the dedicated priority of the adjacent cell does not meet the reselection rule, the user equipment determines whether the cell meets a handover rule, if the handover rule is met, the user equipment switches to an active state, and the base station controls the user equipment to switch to the adjacent cell. Therefore, the user equipment is prevented from residing in the current cell with poor communication quality within the validity period of the priority parameter, the switching can be quickly completed when the adjacent cell with high communication quality is found, the communication quality of the user equipment can be effectively improved, and the conversation experience of the user equipment is improved.
Referring to fig. 6, fig. 6 is a diagram illustrating an apparatus with a storage function according to the present invention. The apparatus 20 having a memory function has stored therein at least one program instruction 31, the program instruction 31 being for performing the method of cell determination as shown in fig. 1-4. In one embodiment, the apparatus with storage function may be a storage chip in a terminal, a hard disk, or a removable hard disk or other readable and writable storage tool such as a flash disk, an optical disk, or the like, and may also be a server or the like.
As can be seen from the above description, the program stored in the embodiment of the apparatus with storage function of the present invention may detect whether the priority of the neighboring cell having a higher communication quality than the current cell meets the preset condition when the ue is in the idle state, and if so, the ue changes from the idle state to the active state, so as to switch to the neighboring cell within the validity period of the priority parameter. Different from the prior art, when the communication quality of the adjacent cell is good and the special priority is low, the user equipment can only be reselected to the adjacent cell after waiting for the validity period of the priority parameter to be invalid, and only the current cell with poor communication quality can be resided before the validity period of the priority parameter is invalid. The user equipment can be quickly accessed to the adjacent cell with better communication quality, the communication quality of the user equipment is effectively improved, and the user experience is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A method for cell determination, comprising:
the user equipment is in an idle state;
when detecting that the communication quality of an adjacent cell is higher than that of a current cell and the priority of the adjacent cell meets a preset condition, switching to an active state and switching from the current cell to the adjacent cell within the validity period of priority parameters;
the preset conditions include: the dedicated priority of the neighboring cell is lower than the dedicated priority of the current cell, and the universal priority of the neighboring cell is higher than or equal to the universal priority of the current cell.
2. The method according to claim 1, wherein the transition to the active state when it is detected that there is a neighboring cell whose communication quality is higher than that of the current cell and the priority of the neighboring cell meets a preset condition comprises:
detecting the communication quality of adjacent cells in a first adjacent cell set, and judging whether a second adjacent cell set with the communication quality of the adjacent cells higher than that of the current cell exists in the first adjacent cell set;
if the second adjacent cell set exists, judging whether a third adjacent cell set with the special priority of the adjacent cell lower than that of the current cell exists in the second adjacent cell set;
if the third adjacent cell set exists, judging whether a fourth adjacent cell set with the common priority of the adjacent cells higher than or equal to the common priority of the current cell exists in the third adjacent cell set;
and if the fourth adjacent cell set exists, switching to an activated state.
3. The method of claim 2, further comprising:
when detecting that the communication quality of a neighboring cell is higher than that of a current cell and the special priority of the neighboring cell is lower than or equal to that of the current cell, performing cell reselection to reside in the neighboring cell; and/or
And if the communication quality of the adjacent cell is not detected to be higher than that of the current cell, or the communication quality of the adjacent cell is detected to be higher than that of the current cell and the universal priority of the adjacent cell is lower than that of the current cell, cell reselection is not performed.
4. The method of claim 1, wherein the handing over from the current cell to the neighboring cell within the validity period of the priority parameter comprises:
receiving measurement control issued by a current cell;
responding to the measurement control to report a measurement report to the current cell;
and establishing connection with one adjacent cell according to RRC connection reconfiguration issued by the current cell, wherein the adjacent cell for establishing connection is the adjacent cell with the best communication quality in the adjacent cells with the priorities meeting the preset conditions.
5. The method of claim 1, wherein the step of transitioning to an active state comprises:
the user equipment actively initiates a data connection or is directly configured to be in an activated state.
6. The method of claim 1, further comprising:
if the communication quality of the adjacent cell is not detected to be higher than that of the current cell, the communication quality of the adjacent cell is repeatedly detected within the validity period of the priority parameter until the communication quality of the adjacent cell is detected to be higher than that of the current cell; and/or
And if the communication quality of one adjacent cell is detected to be lower than that of the current cell for multiple times, the communication quality of the adjacent cell is not detected any more subsequently.
7. The method of claim 1, further comprising:
and receiving a radio resource control release message, and acquiring the special priority of at least one adjacent cell and the special priority of the current cell from the radio resource control release message.
8. A user device, comprising: a processor, a memory, a communication circuit, the processor coupled to the memory and the communication circuit;
wherein the memory is for storing program instructions for implementing the cell determination method of any one of claims 1-7;
the processor and the communication circuitry are configured to execute program instructions stored by the memory to implement the cell determination method of any of claims 1-7.
9. An apparatus having storage functionality, wherein program instructions are stored, which program instructions are executable to implement the steps in the method according to any one of claims 1 to 7.
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