CN103327546A - Cell reselecting method and device - Google Patents
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Abstract
The invention provides a cell reselecting method and device. The method comprises the steps that a terminal receives system information broadcast by a current serving cell, wherein network type information and priority information of adjacent regions of the current serving cell are included in the system information; the terminal determines at least one target adjacent region matched with the service feature type of the terminal according to the service feature type of the terminal and the network type information of the adjacent regions; the terminal increases the priority of the target adjacent regions to enable the priority of the target adjacent regions to be higher than the priority of other adjacent regions of the current serving cell when the priority of the target adjacent regions is lower than the priority of other adjacent regions of the current serving cell; the terminal determines a reselected target cell according to adjusted priority information of the adjacent regions of the current serving cell. Therefore, the terminal reselects a cell matched with the service feature type of the terminal, namely a voice-service-oriented terminal reselects a 2G cell or a 3G cell and a data-traffic-oriented terminal reselects an LTE cell, and then user experience is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a cell reselection method and apparatus.
Background
In the existing mobile communication network, there are various networks such as GSM, CDMA2000, WCDMA, TD-SCDMA, LTE, and the like. GSM and CDMA belong to 2G network, and CDMA2000, WCDMA and TD-SCDMA belong to 3G network.
In the prior art, when a terminal is located in an overlapping coverage area of networks such as 2G, 3G, and LTE, and performs cell reselection, the terminal needs to monitor system information broadcast by a cell, acquire priority parameters of neighboring cells carried in the system information, and reselect the cell by using a reselection criterion based on priority.
However, the data transmission speed of the 2G network and the 3G network is low, the LTE network only supports data services, and if a cell reselected by a terminal belongs to the LTE network, a Circuit Switched Fallback (CSFB) procedure is frequently triggered when the terminal mainly using voice services performs a voice call, so as to increase the call setup delay; if the cell reselected by the terminal belongs to the 2G network, the data transmission speed of the terminal mainly based on the data service is low, and the user experience is influenced.
Disclosure of Invention
The invention provides a cell reselection method and a cell reselection device, which are used for solving the problem that in the prior art, the experience of a user is poor due to the fact that the network type of a cell reselected by a terminal is not matched with the service characteristic type of the terminal.
A first aspect of the present invention provides a cell reselection method, including:
a terminal receives system information broadcasted by a current service cell, wherein the system information carries neighbor cell network type information of the current service cell and priority information of neighbor cells;
the terminal determines at least one target neighbor cell matched with the service feature type according to the service feature type of the terminal and the neighbor cell network type information;
when the priority of the target neighbor cell is lower than the priority of other neighbor cells except the target neighbor cell in the neighbor cells of the current service cell, the terminal increases the priority of the target neighbor cell so as to make the priority of the target neighbor cell higher than the priority of other neighbor cells except the target neighbor cell in the neighbor cells of the current service cell;
and the terminal determines to reselect the target cell according to the adjusted priority information of the adjacent cell of the current service cell.
Another aspect of the present invention provides a cell reselection apparatus, including:
a receiving module, configured to receive system information broadcasted by a current serving cell, where the system information carries neighbor network type information of the current serving cell and priority information of a neighbor cell;
a determining module, configured to determine at least one target neighbor cell matched with the service feature type according to the service feature type of the terminal and the neighbor cell network type information;
a raising module, configured to raise the priority of the target neighbor cell when the priority of the target neighbor cell is lower than the priorities of other neighbor cells, except the target neighbor cell, in the neighbor cell of the current serving cell, so that the priority of the target neighbor cell is higher than the priorities of other neighbor cells, except the target neighbor cell, in the neighbor cell of the current serving cell;
the determining module is further configured to determine a reselection target cell according to the adjusted priority information of the neighboring cell of the current serving cell.
The invention determines at least one target adjacent cell matched with the service characteristic type according to the service characteristic type of the terminal and the network type information of the adjacent cells, when the priority of the target adjacent cell is lower than the priority of other adjacent cells except the target adjacent cell in the adjacent cells of the current service cell, the priority of the target adjacent cell is improved, so that the priority of the target adjacent cell is higher than the priority of other adjacent cells except the target adjacent cell in the adjacent cells of the current service cell, and the reselected target cell is determined according to the adjusted priority information of the adjacent cells of the current service cell, so that the terminal reselects to the cell matched with the service characteristic type, namely the terminal mainly based on voice service reselects to a 2G or 3G cell, the terminal mainly based on data service reselects to an LTE cell, and the user experience is improved.
Drawings
Fig. 1 is a flowchart of a cell reselection method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a cell reselection process performed by a multi-mode LTE-capable terminal according to a priority-based reselection criterion in the prior art;
fig. 3 is a flowchart of a cell reselection method according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a cell reselection apparatus according to an 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.
Fig. 1 is a flowchart of an embodiment of a cell reselection method provided in the present invention, as shown in fig. 1, including:
101. and the terminal receives system information broadcasted by the current service cell, wherein the system information carries neighbor cell network type information of the current service cell and priority information of the neighbor cells.
The network type information of the neighboring cell of the current serving cell may specifically be GSM, CDMA2000, WCDMA, TD-SCDMA, and LTE. GSM and CDMA belong to 2G network, and CDMA2000, WCDMA and TD-SCDMA belong to 3G network. The 2G network and the 3G network can support voice service and data service, but the data transmission speed is low, while the LTE network only supports data service. The priority of the neighboring cell may specifically be any integer value from 0 to 7, and the larger the priority value of the neighboring cell is, the higher the priority of the neighboring cell is. The terminal may specifically be a mobile phone, a notebook computer, a palm computer, a vehicle-mounted terminal, or other terminals supporting multiple modes. A terminal supporting multiple modes refers to a terminal that can simultaneously support LTE and any one or more of the other network types mentioned above.
102. And the terminal determines at least one target adjacent cell matched with the service characteristic type according to the service characteristic type of the terminal and the adjacent cell network type information.
The service feature types of the terminal comprise: voice traffic and data traffic are dominant. If the service characteristic type of the terminal is mainly voice service, the network type of the target adjacent cell matched with the service characteristic type of the terminal is 2G or 3G; and if the service characteristic type of the terminal is mainly data service, the network type of the target adjacent cell matched with the service characteristic type of the terminal is LTE.
In practice, a terminal may execute both a voice service and a data service, and the terminal may execute the voice service at a certain time and execute the data service at another time, so that the service feature type of the terminal is mainly the voice service, specifically, the terminal mainly executes the voice service, that is, the terminal prefers the voice service; the service feature type of the terminal is mainly data service, and specifically may refer to that the terminal mainly performs data service, that is, the terminal prefers data service.
The service feature type of the terminal may be pre-configured on the terminal by the operator. The terminal may change the service feature type of the terminal, for example, the terminal may determine whether the terminal is mainly a voice service or a data service according to the traffic of the voice service and the traffic of the data service occurring at the terminal, and change the service feature type configured in advance according to the determination result. The terminal may also change the service feature type configured in advance according to the indication information issued by the network, for example, after the terminal mainly using the voice service receives the CSFB supporting indication issued by the network, the service feature type of the terminal may be changed to mainly using the data service, so that the terminal preferentially resides in the LTE network, and can enjoy the high rate provided by the LTE while providing the voice service.
In addition, the system information broadcasted by the current serving cell may also carry a priority adjustment indication for indicating the terminal to adjust the priority of the target neighboring cell. The network may control whether to allow the terminal to adjust the priority of the target neighboring cell by whether to carry the priority adjustment indication in the system message.
103. When the priority of the target adjacent cell is lower than the priority of other adjacent cells except the target adjacent cell in the adjacent cells of the current service cell, the terminal increases the priority of the target adjacent cell so as to enable the priority of the target adjacent cell to be higher than the priority of other adjacent cells except the target adjacent cell in the adjacent cells of the current service cell.
When the priority of the target neighboring cell configured by the network is higher than the priorities of other neighboring cells except the target neighboring cell in the neighboring cell of the current serving cell, the terminal may not perform priority adjustment.
The terminal can increase a fixed value on the priority of the target adjacent cell so that the lowest value in the adjusted priority of the target adjacent cell is higher than the highest value in the priorities of other adjacent cells except the target adjacent cell in the adjacent cell of the current service cell; the terminal can multiply the priority of the target adjacent cell by a fixed value, and improve the priority of each target adjacent cell in equal proportion, so that the lowest value in the adjusted priority of the target adjacent cell is higher than the highest value in the priorities of other adjacent cells except the target adjacent cell in the adjacent cell of the current service cell.
The terminal can also execute a neighbor cell sorting operation, and the neighbor cell sorting operation comprises the following steps: respectively sorting the target neighbor cells and other neighbor cells in a descending order according to the corresponding priority to obtain a target neighbor cell list and other neighbor cell lists; the terminal executes the priority sorting operation, and the priority sorting operation comprises the following steps: respectively sequencing the priorities of the target neighbor cells and the priorities of other neighbor cells in a descending order to obtain a target neighbor cell reselection priority list and other neighbor cell reselection priority lists; the terminal executes a priority switching operation, wherein the priority switching operation comprises the following steps: exchanging the lowest value in the target neighbor cell reselection priority list with the highest value in other neighbor cell reselection priority lists; the terminal repeatedly executes the priority exchange operation and the priority sorting operation until the lowest value in the target neighbor cell reselection priority list is higher than the highest values in other neighbor cell reselection priority lists; and the terminal sequentially distributes each priority in the adjusted target neighbor cell reselection priority list to each neighbor cell in the target neighbor cell list, and sequentially distributes each priority in the adjusted other neighbor cell reselection priority list to each neighbor cell in the other neighbor cell list.
104. And the terminal determines to reselect the target cell according to the adjusted priority information of the adjacent cell of the current service cell.
Specifically, the terminal may determine to reselect the target cell by using the set reselection policy. The set reselection policy may be a priority-based reselection criterion.
For a multimode terminal supporting LTE, in the prior art, a terminal uses a cell reselection flowchart based on a reselection criterion of a priority level according to a priority level of a neighboring cell of a current serving cell, as shown in fig. 2, the cell reselection flowchart includes:
201. the terminal resides in the current serving cell.
202. The terminal monitors the system message of the current service cell, and acquires the network type information of the adjacent cell and the priority information of the adjacent cell related to cell reselection from the system message.
203. The terminal judges whether the high-priority neighbor cells exist, namely whether the priority of each neighbor cell is greater than that of the current service cell, if so, the step 204 is carried out; otherwise, go to step 207.
204. And the terminal carries out high-priority neighbor measurement.
205. Reselection decision time limit Treselection in current service cellRATIf the signal metric Sx of the high-priority neighbor cell is larger than the reselection threshold Thresh of the high-priority neighbor cellX.HighAnd the terminal residence time in the current serving cell exceeds 1s, then go to step 206; otherwise, go to step 201.
The signal metric value Sx may be Srxlev or Squal.
And Srxlev = Qrxlevmeas-Qrxlevmin-Pcompensation;
Squal=Qqualmeas-Qqualmin-Pcompensation；
wherein, Qrxlevmeas is the measured cell receiving level value; qrxlevmin is a minimum receiving level threshold value of the cell; qqualmeas is the measured cell quality value; qqualmin is a minimum quality threshold value of a cell; pcompensation = max (PEMAX-PUMAX, 0); PEMAX is the maximum transmit power that a terminal is allowed to use when transmitting uplink; the PUMAX is the maximum output power of the terminal.
In addition, Srxlev may specifically be common pilot channel received signal code power (CPICH RSCP) in a WCDMA cell; reference Signal Received Power (RSRP) may be specific in an LTE cell; the received signal code power (P-CCPCH RSCP) of the common control physical channel can be specifically used in the TD-SCDMA cell; in GSM cells in particular the average received signal level may be used.
The Squal can be specifically a common pilot channel carrier-to-interference ratio (CPICHec/Io) in the WCDMA cell; in particular, the Reference Signal Received Quality (RSRQ) may be used in an LTE cell.
206. And the terminal reselects the high-priority neighbor cell.
207. The terminal judges whether there is a low priority adjacent cell, that is, whether the priority of each adjacent cell is less than the priority of the current service cell, if yes, go to step 208; otherwise, go to step 201.
208. Whether the terminal analyzes the system message to provide a cell reselection measurement triggering threshold Snonintra SearchIf S is provided in the system messagenonintra SearchGo to step 209; otherwise, go to step 210.
209. The terminal judges whether the signal metric Sx of the current service cell is greater than Snonintra SearchIf Sx>Snonintra SearchStep 201 is performed; otherwise, go to step 210.
210. And the terminal performs low-priority neighbor measurement.
211. Reselection decision time limit Treselection in current service cellRATIf the signal metric value Sx of the current service cell<ThreshServing.LowSignal metric Sx of low priority neighbors>ThreshX.LowAnd when the terminal resides in the current serving cell for more than 1s, go to step 212; otherwise, go to step 201.
Among them, ThreshServing.LowA threshold, Thresh, of a signal metric value to be satisfied by the current serving cell when reselecting to a low priority neighbor cellX.LowIs the reselection threshold of the low-priority neighbor cell.
212. And the terminal reselects to the low-priority neighbor cell.
In this embodiment, at least one target neighboring cell matched with the service feature type is determined according to the service feature type of the terminal and the network type information of the neighboring cells, when the priority of the target neighboring cell is lower than the priorities of other neighboring cells except the target neighboring cell in the neighboring cells of the current serving cell, the priority of the target neighboring cell is increased so that the priority of the target neighboring cell is higher than the priorities of other neighboring cells except the target neighboring cell in the neighboring cells of the current serving cell, the terminal determines the target cell according to the adjusted priority information of the neighboring cells of the current serving cell and a set reselection strategy, so that the terminal reselects to a cell matched with the service feature type, that is, the terminal mainly based on the voice service reselects to a 2G or 3G cell, the terminal mainly based on the data service reselects to an LTE cell, and user experience is improved.
In addition, after the terminal simultaneously improves the priority of each target adjacent cell, if the terminal fails to reselect the adjacent cell with the highest priority among the target adjacent cells, the terminal can also reselect the adjacent cell with the highest priority among the target adjacent cells, so that the success rate of the inter-system cell reselection is improved, and the terminal can be ensured to reselect the network matched with the service characteristic type of the inter-system cell.
The cell reselection is divided into intra-system cell reselection and inter-system cell reselection, wherein the intra-system cell reselection refers to the reselection of cells with the same frequency or different frequencies in a wireless access system; inter-system cell reselection refers to cell reselection between a plurality of radio access systems. When the cell reselection is carried out in the system, the network type of each adjacent cell of the cell is consistent with the network type of the current service cell of the terminal, and the adjacent cells matched with the service characteristic type of the terminal are all adjacent cells or empty, so that the priority adjustment is not needed. Therefore, the application scenario of this embodiment is mainly inter-system cell reselection.
Fig. 3 is a flowchart of a cell reselection method according to another embodiment of the present invention, as shown in fig. 3, including:
301. the terminal resides in an LTE serving cell.
302. The terminal reads the system information of the LTE service cell, and acquires the reselection priority parameter (cell reselection priority) of each frequency point of the same-frequency adjacent cell of the same system, the different-frequency adjacent cell of the same system and the adjacent cell of the different system.
As shown in table 1, the reselection priority parameter of the current serving cell of the terminal is stored in SIB3 in the system message, the reselection priority parameter of the LTE inter-frequency neighboring cell is stored in SIB5 in the system message, the reselection priority parameters of the TD-SCDMA neighboring cell and the WCDMA neighboring cell are stored in SIB6 in the system message, the reselection priority parameter of the GSM neighboring cell is stored in SIB7 in the system message, and the reselection priority parameter of the CDMA2000 neighboring cell is stored in SIB8 in the system message.
Table 1 distribution of reselection priority parameters in system messages
303. The terminal analyzes whether the system message provides Priority Adjustment indication parameters (Priority Adjustment), if the system message does not provide Priority Adjustment parameters, the terminal does not adjust the reselection priorities of the neighboring cells, and step 316 is performed; if the Priority Adjustment parameter is provided in the system message, step 304 is performed to adjust the reselection Priority of each neighboring cell.
When the current serving cell is an LTE cell, the priority adjustment indication parameter may be located in a cell Reselection Common information (cell Reselection information Common) field in a system message SIB3 message block of the LTE cell, where the cell Reselection Common information field includes Common information of co-frequency, inter-frequency, and inter-system cell Reselection. The current service cell informs the terminal to adjust the reselection Priority of the neighboring cell by carrying the Priority Adjustment parameter in the SIB 3.
304. The terminal checks whether the network type of each neighboring cell is LTE, and if the network types of all neighboring cells are LTE, the step 316 is performed; otherwise, go to step 305.
305. The terminal arranges the adjacent regions matched with the service characteristic types of the terminal according to the order of the reselection priorities from high to low, and arranges the adjacent regions not matched with the service characteristic types of the terminal according to the order of the reselection priorities from high to low.
Without loss of generality, it is assumed that the sorted LTE neighbor list is denoted as { a1, a2, …, AM }, the corresponding reselection priority list is denoted as { a1, a2, …, AM }, the sorted non-LTE neighbor (2G or 3G neighbor) list is denoted as { B1, B2, …, BN }, and the corresponding reselection priority list is denoted as { B1, B2, …, BN }. Wherein Ai represents the ith LTE adjacent cell, Ai represents the reselection priority of the ith LTE adjacent cell Ai, and M is the number of the LTE adjacent cells; bj represents the jth non-LTE adjacent cell, Bj represents the reselection priority of the jth non-LTE adjacent cell Bj, and N is the number of the non-LTE adjacent cells. Wherein ai is not equal to bj, ai is more than or equal to 0 and less than or equal to 7, bj is more than or equal to 0 and less than or equal to 7, i is more than or equal to 0 and less than or equal to M, and j is more than or equal to 0 and less than or equal to N.
306. The terminal checks its own service feature type, if the terminal is mainly voice service, go to step 307; if the terminal is mainly in data service, go to step 312.
307. The terminal judges whether the reselection priorities of all the non-LTE adjacent cells are greater than the reselection priority of the LTE adjacent cell, if the reselection priority of a certain non-LTE adjacent cell is less than the reselection priority of the LTE adjacent cell, the step 308 is carried out, and if not, the step 316 is carried out.
That is, the terminal checks whether the minimum value bN in the non-LTE neighbor reselection priority list is greater than the maximum value a1 in the LTE neighbor reselection priority list.
308. And the terminal exchanges the minimum value in the non-LTE adjacent cell reselection priority list with the maximum value in the LTE adjacent cell reselection priority list.
That is, values of bN and a1 are interchanged, that is, other values of bN _ new = a1, a1_ new = bN, { a1, a2, …, aM } and { b1, b2, …, bN } are kept unchanged, and reselection priority lists of the adjusted LTE neighbor and non-LTE neighbor are respectively denoted as { a1_ new, a2_ new, …, aM _ new }, { b1_ new, b2_ new, …, bN _ new }.
309. And the terminal rearranges the reselection priority lists of the adjusted LTE adjacent cell and the non-LTE adjacent cell according to the reselection priority from high to low respectively.
The terminal rearranges the adjusted reselection priority lists { a1_ new, a2_ new, …, aM _ new }, { b1_ new, b2_ new, …, bN _ new } of the LTE neighboring cell and the non-LTE neighboring cell in the order of reselection priority from high to low, and records the reselection priority lists of the LTE neighboring cell and the non-LTE neighboring cell as { a1 ', a 2', …, aM ', { b 1', b2 ', …, bN' }.
310. The terminal judges whether the reselection priorities in the reselection priority list of the non-LTE neighboring cell are all greater than the reselection priorities in the reselection priority list of the LTE neighboring cell, if so, the step 311 is carried out; otherwise, step 308 and step 309 are repeated until the reselection priorities of all the non-LTE neighbor cells are greater than the reselection priority of the LTE neighbor cell.
311. And sequentially allocating the priorities in the reselection priority list of the adjusted LTE neighboring cell to the cells in the LTE neighboring cell list in sequence, and sequentially allocating the priorities in the reselection priority list of the adjusted non-LTE neighboring cell to the cells in the non-LTE neighboring cell list in sequence, and performing step 316.
After the terminal adjusts the priorities of the LTE neighbors, the terminal sequentially allocates the priorities in the reselection priority list { a1 ', a2 ', …, aM } of the adjusted LTE neighbors to the cells in the LTE neighbor list { a1, a2, …, aM } in order, and sequentially allocates the priorities in the reselection priority list { B1 ', B2 ', …, bN ' ] of the adjusted non-LTE neighbors to the cells in the non-LTE neighbor list { B1, B2, …, bN } in order, so that after the reselection priority adjustment, the reselection priorities of all the neighbors matching the service feature type of the terminal are greater than the reselection priorities of the neighbors other than the neighbor matching the service feature type of the terminal in the current service cell, and the reselection results of the neighbors matching the service feature type of the terminal are kept unchanged, the sequencing results of the reselection priorities of other adjacent cells except the adjacent cell matched with the service characteristic type in the adjacent cell of the current service cell of the terminal are also kept unchanged, so that the use of the flow regulation and control strategy of an operator in the hierarchical network is not influenced.
312. And the terminal judges whether the reselection priorities of all the LTE adjacent cells are greater than the reselection priority of the non-LTE adjacent cell, if the reselection priority of one LTE adjacent cell is less than the reselection priority of the non-LTE adjacent cell, the step 313 is carried out, and if not, the step 316 is carried out.
That is, the terminal checks whether the minimum value aM in the LTE neighbour reselection priority list is greater than the reselection priority b1 of the non-LTE cell.
313. And the terminal exchanges the minimum value in the LTE adjacent cell reselection priority list with the maximum value in the non-LTE adjacent cell reselection priority list.
That is, the terminal exchanges the values of aM and b1, i.e., aM _ new = b1, b1_ new = aM; other values in { a1, a2, …, aM } and { b1, b2, …, bN } are kept unchanged, and the reselection priority lists of the adjusted LTE neighbor cell and the non-LTE neighbor cell are denoted as { a1_ new, a2_ new, …, aM _ new }, { b1_ new, b2_ new, …, bN _ new }.
314. And the terminal rearranges the reselection priority lists of the adjusted LTE adjacent cell and the non-LTE adjacent cell according to the reselection priority from high to low respectively.
The terminal rearranges the adjusted reselection priority lists { a1_ new, a2_ new, …, aM _ new }, { b1_ new, b2_ new, …, bN _ new } of the LTE neighboring cell and the non-LTE neighboring cell in the order of reselection priority from high to low, and the reselection priority lists of the LTE neighboring cell and the non-LTE neighboring cell after being sorted are denoted as { a1 ', a 2', …, aM ', { b 1', b2 ', …, bN' }.
315. The terminal judges whether the reselection priorities in the reselection priority list of the LTE neighboring cell are all larger than the reselection priorities in the reselection priority list of the non-LTE neighboring cell, if so, the step 311 is carried out; otherwise, step 313 and 314 are repeated until the reselection priorities of all the LTE neighbor cells are greater than the reselection priority of the non-LTE neighbor cell.
And step 316, the terminal determines a reselection target cell according to the priority information of each neighboring cell and a set reselection strategy.
For example, when the terminal is located in an overlapping coverage area of the LTE network and the WCDMA network and a current serving cell of the terminal is an LTE cell, the terminal reads an SIB3 in the system message by monitoring a system message issued by the current serving cell, and acquires a reselection priority of the current serving cell, that is, cell reselection priority _ LTE _ F0= 2; reading SIB6 in a system message, and obtaining reselection priorities of frequency points in a WCDMA neighboring cell, namely cellReselectionpriority _ NonLTE _ F1=1, cellReselectionpriority _ NonLTE _ F2= 0; the terminal analyzes the PRIORITYLADjustment parameter from the system message SIB 3; the neighbor list configured for the current serving CELL CELL A comprises a CELL CELL B on a frequency point of WCDMA F1 and a CELL CELL C on a frequency point of WCDMA F2.
The terminal arranges the WCDMA adjacent CELL lists according to the reselection priorities from high to low, the sorted WCDMA adjacent CELL lists are marked as { CELL B, CELL C }, and the corresponding CELL reselection priorities are marked as {1,0 }.
When the terminal in the area is mainly based on voice service, because the minimum value in the reselection priority list of the WCDMA neighboring area is 0 and is smaller than the reselection priority 2 of the LTE cell of the current service cell of the terminal, the terminal exchanges the minimum value in the reselection priority list of the WCDMA neighboring area with the reselection priority of the LTE cell; the reselection priority list of the regulated WCDMA neighboring cell is {1,2 }; after the reselection priority list of the WCDMA neighboring cell is reordered according to the sequence of the priorities from high to low, the reselection priority list of the WCDMA neighboring cell is {2,1 }; the values in the reselection priority list {2,1} of the WCDMA neighboring CELL are sequentially distributed to the reselection priority list { CELL B, CELL C } of the WCDMA neighboring CELL, namely the reselection priority of CELL B is 2, and the reselection priority of CELL C is 1; at this time, the reselection priority of the current serving CELL LTE CELL a of the terminal is 0. The terminal can reselect the cell according to the adjusted reselection priority parameter of each neighboring cell, so that the terminal mainly based on the voice service can preferentially reselect the WCDMA network.
When the terminal in the area is mainly based on the data service, the reselection priority of the current service cell LTE cell of the terminal is 2 and is greater than the reselection priorities of all WCDMA neighboring cells, so the terminal does not need to adjust the reselection priority.
In the embodiment, at least one target adjacent cell matched with the service characteristic type is determined according to the service characteristic type of the terminal and the adjacent cell network type information, when the priority of the target adjacent cell is lower than the priority of other adjacent cells except the target adjacent cell in the adjacent cells of the current service cell, the priority of the target adjacent cell is improved, so that the priority of all target adjacent cells is higher than that of other adjacent cells except the target adjacent cell in the adjacent cells of the current service cell, and the terminal adjusts the priority information of the adjacent cells of the current service cell, determining a reselection target cell according to the set reselection strategy, so that the terminal reselects to a cell matched with the service characteristic type of the terminal, namely, the terminal mainly based on voice service reselects to a 2G cell or a 3G cell, and the terminal mainly based on data service reselects to an LTE cell, so that the user experience is improved; and after the reselection priority is adjusted, the result of the corresponding reselection priority ranking of each neighboring cell matched with the service feature type of the terminal is kept unchanged, and the result of the corresponding reselection priority ranking of other neighboring cells except the neighboring cell matched with the service feature type in the neighboring cell of the current service cell of the terminal is also kept unchanged, so that the use of the flow regulation and control strategy of the operator in the hierarchical network is not influenced. In addition, after the terminal simultaneously improves the priority of each target adjacent cell, if the terminal fails to reselect the adjacent cell with the highest priority among the target adjacent cells, the terminal can also reselect the adjacent cell with the highest priority among the target adjacent cells, so that the success rate of the inter-system cell reselection is improved, and the terminal can be ensured to reselect the network matched with the service characteristic type of the inter-system cell.
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.
Fig. 4 is a schematic structural diagram of an embodiment of a cell reselection apparatus provided in the present invention, as shown in fig. 4, including:
the receiving module 41 is configured to receive system information broadcasted by the current serving cell, where the system information carries neighbor network type information of the current serving cell and priority information of a neighbor.
And the determining module 42 is configured to determine a target neighboring cell matched with the feature type according to the service feature type of the terminal and the neighboring cell network type information.
The service feature types comprise: the voice service is used as a main service and the data service is used as a main service; the network types include: 2G networks, 3G networks and LTE networks.
The determining module 42 is specifically configured to, if the service feature type is mainly voice service, determine that the network type of the target neighboring cell matched with the service feature type is 2G or 3G; or,
and if the service characteristic type is mainly data service, the network type of the target adjacent cell matched with the service characteristic type is LTE.
Further, the system information broadcasted by the current serving cell may also carry a priority adjustment indication, which is used to instruct the apparatus to adjust the priority of the target neighboring cell.
A raising module 43, configured to raise the priority of the target neighboring cell when the priority of the target neighboring cell is lower than the priorities of other neighboring cells, except the target neighboring cell, in the neighboring cell of the current serving cell, so that the priority of the target neighboring cell is higher than the priorities of other neighboring cells, except the target neighboring cell, in the neighboring cell of the current serving cell;
the determining module 42 is further configured to determine a reselection target cell according to the priority information of the neighboring cell of the current serving cell after the adjustment is improved.
Further, the improving module 43 may be specifically configured to, if a plurality of target neighboring cells are determined, execute a neighboring cell sorting operation by the terminal, where the neighboring cell sorting operation includes: respectively sorting the target neighbor cells and other neighbor cells in a descending order according to the corresponding priority to obtain a target neighbor cell list and other neighbor cell lists; the terminal executes the priority sorting operation, and the priority sorting operation comprises the following steps: respectively sequencing the priorities of the target neighbor cells and the priorities of other neighbor cells in a descending order to obtain a target neighbor cell reselection priority list and other neighbor cell reselection priority lists;
the terminal executes a priority switching operation, wherein the priority switching operation comprises the following steps: exchanging the lowest value in the target neighbor cell reselection priority list with the highest value in other neighbor cell reselection priority lists; the terminal repeatedly executes the priority exchange operation and the priority sorting operation until the lowest value in the target neighbor cell reselection priority list is higher than the highest values in other neighbor cell reselection priority lists; and the terminal sequentially distributes each priority in the adjusted target neighbor cell reselection priority list to each neighbor cell in the target neighbor cell list, and sequentially distributes each priority in the adjusted other neighbor cell reselection priority list to each neighbor cell in the other neighbor cell list.
In this embodiment, at least one target neighboring cell matched with the service feature type is determined according to the service feature type of the terminal and the network type information of the neighboring cells, when the priority of the target neighboring cell is lower than the priorities of other neighboring cells except the target neighboring cell in the neighboring cells of the current serving cell, the priority of the target neighboring cell is increased, so that the priority of the target neighboring cell is higher than the priorities of other neighboring cells except the target neighboring cell in the neighboring cells of the current serving cell, and the target cell is determined to be reselected according to the adjusted priority information of the neighboring cells of the current serving cell, so that the terminal is reselected to a cell matched with the service feature type thereof, that is, the terminal mainly based on the voice service is reselected to a 2G or 3G cell, the terminal mainly based on the data service is reselected to an LTE cell, and user experience is improved.
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 (8)
1. A method of cell reselection, comprising:
a terminal receives system information broadcasted by a current service cell, wherein the system information carries neighbor cell network type information of the current service cell and priority information of neighbor cells;
the terminal determines at least one target neighbor cell matched with the service feature type according to the service feature type of the terminal and the neighbor cell network type information;
when the priority of the target neighbor cell is lower than the priority of other neighbor cells except the target neighbor cell in the neighbor cells of the current service cell, the terminal increases the priority of the target neighbor cell so as to make the priority of the target neighbor cell higher than the priority of other neighbor cells except the target neighbor cell in the neighbor cells of the current service cell;
and the terminal determines to reselect the target cell according to the adjusted priority information of the adjacent cell of the current service cell.
2. The method of claim 1, wherein the traffic feature type comprises: the voice service is used as a main service and the data service is used as a main service; the network types include: 2G networks, 3G networks and LTE networks;
the determining at least one target neighboring cell matched with the service feature type includes:
if the service feature type is mainly voice service, the network type of the target adjacent cell matched with the service feature type is 2G or 3G; or,
and if the service characteristic type is mainly data service, the network type of the target adjacent cell matched with the service characteristic type is LTE.
3. The method according to claim 1 or 2, wherein the terminal increasing the priority of the target neighbor cell comprises:
if the terminal determines a plurality of target neighbor cells, the terminal executes neighbor cell sequencing operation, wherein the neighbor cell sequencing operation comprises: respectively sorting the target neighbor cells and the other neighbor cells in a descending order according to the corresponding priority to obtain a target neighbor cell list and other neighbor cell lists;
the terminal executes a prioritization operation, the prioritization operation comprising: respectively sequencing the priorities of the target neighbor cells and the priorities of the other neighbor cells in a descending order to obtain a target neighbor cell reselection priority list and other neighbor cell reselection priority lists;
the terminal executes a priority exchange operation, wherein the priority exchange operation comprises the following steps: exchanging the lowest value in the target neighbor cell reselection priority list with the highest value in the other neighbor cell reselection priority lists;
the terminal repeatedly executes the priority exchange operation and the priority sorting operation until the lowest value in the target neighbor cell reselection priority list is higher than the highest values in the other neighbor cell reselection priority lists;
and the terminal sequentially distributes each priority in the adjusted target neighbor cell reselection priority list to each neighbor cell in the target neighbor cell list, and sequentially distributes each priority in the adjusted other neighbor cell reselection priority list to each neighbor cell in the other neighbor cell list.
4. The method of claim 1, wherein the system information broadcasted by the current serving cell further carries: and a priority adjustment instruction, wherein the priority adjustment instruction is used for instructing the terminal to adjust the priority of the target neighboring cell.
5. A cell reselection apparatus, comprising:
a receiving module, configured to receive system information broadcasted by a current serving cell, where the system information carries neighbor network type information of the current serving cell and priority information of a neighbor cell;
a determining module, configured to determine at least one target neighbor cell matched with the service feature type according to the service feature type of the terminal and the neighbor cell network type information;
a raising module, configured to raise the priority of the target neighbor cell when the priority of the target neighbor cell is lower than the priorities of other neighbor cells, except the target neighbor cell, in the neighbor cell of the current serving cell, so that the priority of the target neighbor cell is higher than the priorities of other neighbor cells, except the target neighbor cell, in the neighbor cell of the current serving cell;
the determining module is further configured to determine a reselection target cell according to the adjusted priority information of the neighboring cell of the current serving cell.
6. The apparatus of claim 5, wherein the traffic feature type comprises: the voice service is used as a main service and the data service is used as a main service; the network types include: 2G networks, 3G networks and LTE networks;
the determining module is specifically configured to, if the service feature type is mainly voice service, determine that a network type of a target neighboring cell matched with the service feature type is 2G or 3G; or,
and if the service characteristic type is mainly data service, the network type of the target adjacent cell matched with the service characteristic type is LTE.
7. The apparatus according to claim 5 or 6, wherein the increasing module is specifically configured to, if a plurality of the target neighbor cells are determined, the terminal performs a neighbor cell ranking operation, where the neighbor cell ranking operation includes: respectively sorting the target neighbor cells and the other neighbor cells in a descending order according to the corresponding priority to obtain a target neighbor cell list and other neighbor cell lists;
the terminal executes a prioritization operation, the prioritization operation comprising: respectively sequencing the priorities of the target neighbor cells and the priorities of the other neighbor cells in a descending order to obtain a target neighbor cell reselection priority list and other neighbor cell reselection priority lists;
the terminal executes a priority exchange operation, wherein the priority exchange operation comprises the following steps: exchanging the lowest value in the target neighbor cell reselection priority list with the highest value in the other neighbor cell reselection priority lists;
the terminal repeatedly executes the priority exchange operation and the priority sorting operation until the lowest value in the target neighbor cell reselection priority list is higher than the highest values in the other neighbor cell reselection priority lists;
and the terminal sequentially distributes each priority in the adjusted target neighbor cell reselection priority list to each neighbor cell in the target neighbor cell list, and sequentially distributes each priority in the adjusted other neighbor cell reselection priority list to each neighbor cell in the other neighbor cell list.
8. The apparatus of claim 5, wherein the system information broadcasted by the current serving cell further carries: a priority adjustment indication to instruct the apparatus to adjust the priority of the target neighbor.
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