CN105376820B - Cell selection method and device - Google Patents
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- CN105376820B CN105376820B CN201410404012.0A CN201410404012A CN105376820B CN 105376820 B CN105376820 B CN 105376820B CN 201410404012 A CN201410404012 A CN 201410404012A CN 105376820 B CN105376820 B CN 105376820B
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- 238000010187 selection method Methods 0.000 title abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 30
- 230000009977 dual effect Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 5
- 210000004027 cell Anatomy 0.000 description 223
- 238000010586 diagram Methods 0.000 description 7
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
- 238000012549 training Methods 0.000 description 1
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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
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
- H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
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Abstract
The invention provides a cell selection method and a device, wherein the method comprises the following steps: acquiring first signal quality information when a terminal resides in a first cell and second signal quality information when the terminal resides in a second cell, wherein a first capability level required by the terminal for accessing the first cell is different from a second capability level required by the terminal for accessing the second cell; comparing the first signal quality information with the second signal quality information to obtain a comparison result; judging whether to perform cell switching according to the comparison result; if so, adjusting the current capability level of the terminal, and switching the terminal from the resident current cell to the resident target cell, wherein the current cell is a first cell, and the target cell is a second cell; or, the current cell is the second cell, and the target cell is the first cell. By adopting the technical scheme, the problem that the terminal cannot be accessed to the cell with good signal quality but low capability level in the related technology is solved, and the terminal can be accessed to the most suitable capability cell.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a cell selection method and apparatus.
Background
In the current wireless terminal products such as smart phones, intelligent uifi, data cards and the like, in a High-speed packet Access (HSPA) HSPA + environment, a version above 3GPP R8 supports Dual Carrier (DC) -HSPA + (capability level category24) and Multiple Input Multiple Output (MIMO) HSPA + (capability level 20) with a rate up to 42Mbps, the capability of the terminal needs to be supported to the capability level category24 according to a protocol specification, and if the terminal reports that the capability 24 can only be accessed to a cell of DC but not to a cell of DC under an environment supported by both DC and MIMO. If the service quality of the DC cell is not good as MIMO, that is, the average value of the service quality of the main cell and the service quality of the auxiliary cell under DC is not good as MIMO cell, the terminal will not access the MIMO cell with good quality, that is, for two cells with different capability levels in the related art, even if the signal quality corresponding to the cell with high capability level is poor, the terminal can only access the cell with high capability level.
Aiming at the problem that a terminal cannot be accessed to a cell with good signal quality but low capability level due to different capability levels in the related art, an effective solution is not provided at present.
Disclosure of Invention
The present invention provides a cell selection method and apparatus to at least solve the above problems.
According to an aspect of the present invention, there is provided a cell selection method, including: acquiring first signal quality information when a terminal resides in a first cell and second signal quality information when the terminal resides in a second cell, wherein a first capability level required by the terminal to access the first cell is different from a second capability level required by the terminal to access the second cell; comparing the first signal quality information with the second signal quality information to obtain a comparison result; judging whether to perform cell switching according to the comparison result; if so, adjusting the current capability level of the terminal, and switching the terminal from a resident current cell to a resident target cell, wherein the current cell is a first cell, and the target cell is a second cell; or, the current cell is a second cell, and the target cell is a first cell.
Preferably, the first signal quality information and/or the second signal quality information includes at least one of: ratio of chip energy to total interference energy density (Ec, received by the mobile terminal) to the spectral noise power density (No, received by the mobile terminal), EC/NO), Received Signal Code Power (RSCP).
Preferably, the determining whether to perform cell handover according to the comparison result includes: the terminal currently resides in the first cell, and when the EC/NO and/or RSCP contained in the second signal quality information is larger than the EC/NO and RSCP contained in the first signal quality information, the terminal is switched from the first cell to the second cell; the cell in which the terminal currently resides is a first cell, and when the EC/NO and/or RSCP contained in the first signal quality information is larger than the EC/NO and RSCP contained in the second signal quality information, the terminal continues to reside in the first cell.
Preferably, before the terminal is handed over from the first cell to the second cell, the method includes: when the first capability level is higher than the second capability level, reducing the first capability level of the terminal to the second capability level, and reporting the first capability level to a network side; and when the first capability level is lower than the second capability level, the first capability level of the terminal is improved to the second capability level, and the first capability level is reported to a network side.
Preferably, before obtaining the first signal quality information when the terminal resides in the first cell and the second signal quality information when the terminal resides in the second cell, the method further includes: acquiring current access cell capability information of a terminal, wherein the current access cell capability information comprises: whether DC is supported, whether MIMO is supported; and when the terminal is judged to support the DC and the MIMO according to the current access cell capability information, acquiring first signal quality information when the terminal resides in a first cell and second signal quality information when the terminal resides in a second cell.
Preferably, the first cell is a dual-carrier DC cell, and the second cell is a multiple-input multiple-output MIMO cell, or the first cell is a MIMO cell, and the second cell is a DC cell.
According to another aspect of the present invention, there is also provided a cell selection apparatus, including: an obtaining module, configured to obtain first signal quality information when a terminal resides in a first cell and second signal quality information when the terminal resides in a second cell, where a first capability level required for the terminal to access the first cell is different from a second capability level required for the terminal to access the second cell; the comparison module is used for comparing the first signal quality information with the second signal quality information to obtain a comparison result; a judging module, configured to judge whether to perform cell handover based on the comparison result; the adjusting module is used for adjusting the current capability level of the terminal if the judgment result is yes; the terminal comprises a switching module, a judging module and a judging module, wherein the switching module is used for switching a terminal from a resident current cell to a resident target cell, the current cell is a first cell, and the target cell is a second cell; or, the current cell is a second cell, and the target cell is a first cell.
Preferably, the obtaining module is configured to obtain, at the first signal quality information and/or the second signal quality information, at least one of the following: and acquiring first signal quality information when the terminal resides in a first cell and second signal quality information when the terminal resides in a second cell when the ratio EC/NO of the chip energy to the total interference energy density and the received signal code power RSCP are obtained.
Preferably, the judging module includes: an adjusting unit, configured to switch the terminal from the first cell to the second cell when the cell where the terminal currently resides is the first cell and when EC/NO and/or RSCP included in the second signal quality information is greater than EC/NO and RSCP included in the first signal quality information; and a camping unit, configured to, when the cell in which the terminal currently camps is a first cell and when the EC/NO and/or RSCP included in the first signal quality information is greater than the EC/NO and RSCP included in the second signal quality information, continue camping on the first cell by the terminal.
Preferably, the apparatus further comprises: a reducing module, configured to reduce the first capability level of the terminal to the second capability level when the first capability level is higher than the second capability level, and report the first capability level to a network side; and the providing module is used for increasing the first capability level of the terminal to the second capability level and reporting the first capability level to a network side when the first capability level is lower than the second capability level.
According to the invention, the technical scheme that the signal quality information is respectively acquired aiming at the two cells with different capability grades, and when the switching is judged to be needed through the signal quality information, the switching between the two cells with different capability grades is realized by adjusting the capability grade of the terminal is adopted, so that the problem that the terminal cannot be accessed to the cell with good signal quality but low capability grade due to different capability grades in the related technology is solved, and the terminal selects the optimal cell under the condition of not upgrading hardware and modifying a protocol, so that the terminal works in the optimal state.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flow chart of a cell selection method according to an embodiment of the present invention;
fig. 2 is a structural diagram required for a cell selection procedure in accordance with a preferred embodiment of the present invention;
fig. 3 is a flowchart of a cell selection method according to a preferred embodiment of the present invention;
fig. 4 is a block diagram of a cell selection apparatus according to an embodiment of the present invention;
fig. 5 is a block diagram of another structure of a cell selection apparatus according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
An embodiment of the present invention provides a cell selection method, and fig. 1 is a flowchart of a cell selection method according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
step S102: acquiring first signal quality information when a terminal resides in a first cell and second signal quality information when the terminal resides in a second cell, wherein a first capability level required by the terminal to access the first cell is different from a second capability level required by the terminal to access the second cell;
step S104: comparing the first signal quality information with the second signal quality information to obtain a comparison result;
step S106: judging whether to carry out cell switching according to the comparison result;
step S108: if so, adjusting the current capability level of the terminal, and switching the terminal from a resident current cell to a resident target cell, wherein the current cell is a first cell, and the target cell is a second cell; or, the current cell is a second cell, and the target cell is a first cell.
Through the steps, the technical scheme that the signal quality information is respectively obtained aiming at the two cells with different capability levels is adopted, when the switching is judged to be needed through the signal quality information, the switching between the two cells with different capability levels is realized by adjusting the capability level of the terminal, the problem that the terminal cannot be accessed to the cell with good signal quality but low capability level caused by different capability levels in the related technology is solved, and the terminal can be accessed to the most suitable capability cell in the environment supported by both DC-HSPA + and MIMO +64QAM without upgrading hardware of the terminal and modifying a protocol is realized.
In an embodiment of the present invention, the first signal quality information and/or the second signal quality information at least includes one of: EC/NO, RSCP, optionally under DC cell EC/NO and RSCP may be understood as the average of the primary and secondary cells.
When the signal quality information is represented by parameters such as EC/NO, RSCP and the like, judging whether to carry out cell switching according to the comparison result, wherein the step comprises the following steps: the cell where the terminal currently resides is a first cell, and when the EC/NO and/or RSCP included in the second signal quality information is greater than the EC/NO and RSCP included in the first signal quality information, the terminal is switched from the currently residing cell to a second cell; the cell in which the terminal currently resides is a first cell, and when the EC/NO and/or RSCP included in the first signal quality information is greater than the EC/NO and RSCP included in the second signal quality information, the terminal continues to reside in the first cell.
In a specific implementation process, when the cell where the terminal currently resides is a second cell, and when the EC/NO and/or RSCP included in the second signal quality information is greater than the EC/NO and RSCP included in the first signal quality information, the terminal continues to reside in the second cell, and when the cell where the terminal currently resides is the second cell, and when the EC/NO and/or RSCP included in the second signal quality information is less than the EC/NO and RSCP included in the first signal quality information, the terminal is switched from the currently residing cell to the first cell.
In the above embodiment, before switching the terminal from the current camped cell to the second cell, the method includes: when the first capability level is higher than the second capability level, reducing the first capability level of the terminal to the second capability level, and reporting the first capability level to a network side; and when the first capability level is lower than the second capability level, the first capability level of the terminal is improved to the second capability level, and the first capability level is reported to a network side.
The embodiment of the present invention further improves the above technical solution in that, before acquiring first signal quality information when the terminal resides in the first cell and second signal quality information when the terminal resides in the second cell, the method further includes: acquiring current access cell capability information of a terminal, wherein the current access cell capability information comprises: whether DC is supported, whether MIMO is supported; when the terminal is judged to support the DC and the MIMO according to the current access cell capability information, first signal quality information when the terminal resides in a first cell and second signal quality information when the terminal resides in a second cell are obtained.
It should be noted that, in the embodiment of the present invention, the first cell and the second cell are two cells with different capability levels, and specifically, the two cells may be: the first cell is a DC cell and the second cell is a MIMO cell, or the first cell is a MIMO cell and the second cell is a DC cell.
In summary, the embodiments of the present invention actually provide a method for a UE to check an optimal environment and camp in a selected environment by adjusting its own terminal capability training in an environment supporting DC-HSPA +, and MIMO +64 QAM.
The above process of selecting the cell can be further summarized as follows: the terminal is started to access the network, if the terminal enters an idle state, a timer is started to record Ec/NO and RSCP of a current cell, then Radio Resource Control (RRC) connection is released, the category capability is reduced to cat20(MIMO +64QAM), the Ec/NO and RSCP of the current cell are recorded, and compared with previous data, the signal quality is better resided in the cell, otherwise, the category capability is improved to cat24(DC-HSPA +) access and returns to the original cell.
In order to better understand the cell selection process in the above embodiment, the cell selection method provided in the embodiment of the present invention is described below with reference to a preferred embodiment, fig. 2 is a structural diagram of the cell selection process according to the preferred embodiment of the present invention, fig. 3 is a flowchart of the cell selection method according to the preferred embodiment of the present invention implemented with reference to the structural diagram shown in fig. 2, as shown in fig. 3:
step a: starting a timer (T), and executing the step b when the timer expires;
step b: checking whether the terminal is in an idle mode, if so, executing the step c, otherwise, executing the step a;
step c: the terminal (U) records the signal quality of the storage cell and executes the step d;
step d: RRC releases and increases or decreases the capability level of the terminal (U), and executes the step e;
step e: the terminal (U) records and stores the signal quality of the MIMO cell and executes the step f;
step f: comparing the signal quality of the DC cell with the signal quality of the MIMO cell, if the DC cell is good, executing the step g, otherwise, executing the step h;
step g: RRC releases and increases or decreases the capability level of the terminal (U), and executes the step h;
step h: and d, residing the current cell and executing the step a.
More specifically, in the power-on state, the terminal first needs to know, through a signaling message, which capability the currently accessed cell is, and if the accessed capability level is lower than CAT20(MIMO +64QAM), the terminal will camp on the cell of the current capability level, at this time, a timer needs to be started, the condition of the capability level of the access cell needs to be checked at regular time, and if it is detected that the capability level of the access cell exceeds CAT20, the following process is started:
recording the capability information of the current access cell, Ec/NO and RSCP information, wherein the cell capability information comprises two kinds of information: one, whether DC dual carrier is supported, and two, whether MIMO +64QAM is supported.
And recording the signal quality Ec/NO and RSCP information of each cell, and recording and storing the information in the terminal. This information will be used to decide whether the terminal selects a DC dual carrier cell or a MIMO +64QAM cell.
The signal quality information needs to obtain Ec/NO and RSCP values from a measurement report signaling message measurementReport, check whether the current accessed cell capability is a DC cell or a MIMO +64QAM cell, and if the current accessed cell capability is the DC cell, execute the first process. And if the cell is a MIMO +64QAM cell, executing the second process.
The first process is as follows: if the CELL is a DC CELL, the terminal actively releases RRC connection by sending rrcConnectionRelease message to the base station if the RRC state is in an IDLE state and a CELL-PCH state by inquiring the RRC state, then reduces the capability level of the terminal, namely, category24(DC-HSPA +) to category20(MIMO +64QAM), and re-initiates an RRC connection request to the base station, in the process, the terminal reduces the previously reported capability level to category20(MIMO +64QAM) when reporting the rrcConnectionSetupCompute message, the modified capability level is embodied in a downlink PhysCapability parameter, and the MIMO information is reported to the base station to indicate that the terminal does not support category24(DC-HSPA +), so that the CELL accessed to +64QAM is realized.
And a second process: if the MIMO +64QAM CELL is accessed previously, the terminal actively releases RRC connection to the base station through rrcConnectionRelease message if the RRC state is in the IDLE state and the CELL-PCH state, the terminal improves the previously reported capability level to the catgory24(DC-HSPA +) when reporting the rrcConnectionSetupComplex message in the process, the modified capability level is embodied in the downlink PhysCapacity parameter, the information is reported to the base station, the base station indicates that the terminal supports the catgory24(DC-HSPA +), the RRC connection request is restarted to the base station, and the terminal capability is improved to the cat24 in the reporting of the rrcConnectionSepComplex message, so that the terminal is accessed to the DC CELL.
The third process: after the first process or the second process is executed, measuring the Ec/NO and RSCP value of the newly accessed capacity cell, comparing the values stored before, wherein the larger Ec/NO and RSCP value represents better signal, if the Ec/NO and RSCP value of the current capacity cell is larger than the stored value, the terminal stays in the current cell and restarts the timer to do next polling; if the Ec/NO and RSCP values of the current capability cell are smaller than the values of the previous capability cell, the terminal releases the RRC connection of the current cell, and performs corresponding capability control to return to the original capability cell again.
The embodiment of the invention mainly solves the problem that the terminal can only access a DC cell in a 3GPP protocol because the DC-HSPA + (CAT24) has higher capability level than the MIMO +64QAM (CAT20) in the 3GPP protocol by measuring the signal quality and controlling the HSPA + capability level reported by the protocol in the environment supported by both DC-HSPA + and MIMO +64 QAM.
In this embodiment, a cell selection apparatus is further provided, which is used to implement the foregoing embodiments and preferred embodiments, and details of the foregoing description are omitted, and a description is provided below for modules involved in the apparatus. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated. Fig. 4 is a block diagram of a cell selection apparatus according to an embodiment of the present invention. As shown in fig. 4, the apparatus includes:
an obtaining module 40, configured to obtain first signal quality information when a terminal resides in a first cell and second signal quality information when the terminal resides in a second cell, where a first capability level required for the terminal to access the first cell is different from a second capability level required for the terminal to access the second cell;
a comparing module 42, connected to the obtaining module 40, for comparing the first signal quality information and the second signal quality information to obtain a comparison result;
a judging module 44, connected to the comparing module 42, for judging whether to perform cell switching based on the comparison result;
an adjusting module 46, connected to the determining module 44, for adjusting the current capability level of the terminal if the determination is yes;
a switching module 48, connected to the adjusting module 46, configured to switch a terminal from a camped current cell to a camped target cell, where the current cell is a first cell and the target cell is a second cell; or, the current cell is a second cell, and the target cell is a first cell.
Through the modules, the technical scheme that the signal quality information is respectively acquired aiming at the two cells with different capability levels is adopted, when the switching is judged to be needed through the signal quality information, the switching between the two cells with different capability levels is realized by adjusting the capability level of the terminal, the problem that the terminal cannot be accessed to the cell with good signal quality but low capability level caused by different capability levels in the related technology is solved, and the terminal can be accessed to the most suitable capability cell in the environment supported by both DC-HSPA + and MIMO +64QAM without upgrading hardware of the terminal and modifying a protocol is realized.
Fig. 5 is a block diagram of another structure of a cell selection apparatus according to an embodiment of the present invention, and as shown in fig. 5, the determining module 44 includes:
an adjusting unit 440, configured to switch the terminal from the first cell to the second cell when the cell where the terminal currently resides is the first cell and when the EC/NO and/or RSCP included in the second signal quality information is greater than the EC/NO and RSCP included in the first signal quality information;
a camping unit 442, configured to, when the cell in which the terminal currently camps is a first cell and when the EC/NO and/or RSCP included in the first signal quality information is greater than the EC/NO and RSCP included in the second signal quality information, continue camping on the first cell.
Optionally, the apparatus further comprises: a reducing module 50, configured to reduce the first capability level of the terminal to the second capability level when the first capability level is higher than the second capability level, and report the first capability level to a network side; a providing module 52, configured to, when the first capability level is lower than the second capability level, increase the first capability level of the terminal to the second capability level, and report the first capability level to a network side.
A further improvement of the foregoing technical solution in the embodiment of the present invention is that the obtaining module 40 is further configured to at least include one of the following information in the first signal quality information and/or the second signal quality information: and acquiring first signal quality information when the terminal resides in a first cell and second signal quality information when the terminal resides in a second cell during EC/NO and RSCP.
In summary, the embodiments of the present invention achieve the following beneficial effects: the method solves the problem that the terminal can not be accessed to the cell with good signal quality but low capability level due to different capability levels in the related technology, and realizes that the terminal can be accessed to the most suitable capability cell in the environment supported by both DC-HSPA + and MIMO +64QAM without upgrading the hardware of the terminal and modifying the protocol.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method for cell selection, the method comprising:
acquiring first signal quality information when a terminal resides in a first cell and second signal quality information when the terminal resides in a second cell, wherein a first capability level required by the terminal to access the first cell is different from a second capability level required by the terminal to access the second cell;
comparing the first signal quality information with the second signal quality information to obtain a comparison result;
judging whether to perform cell switching according to the comparison result;
if so, adjusting the current capability level of the terminal, and switching the terminal from a resident current cell to a resident target cell, wherein the current cell is a first cell, and the target cell is a second cell; or, the current cell is a second cell, and the target cell is a first cell;
before the terminal is switched from the first cell to the second cell, the method includes:
when the first capability level is higher than the second capability level, reducing the first capability level of the terminal to the second capability level, and reporting the first capability level to a network side;
and when the first capability level is lower than the second capability level, the first capability level of the terminal is improved to the second capability level, and the first capability level is reported to a network side.
2. The method according to claim 1, wherein the first signal quality information and/or the second signal quality information comprises at least one of: the ratio EC/NO of the chip energy to the total interference energy density, and the received signal code power RSCP.
3. The method of claim 2, wherein determining whether to perform cell handover according to the comparison comprises:
the terminal currently resides in the first cell, and when the EC/NO and/or RSCP contained in the second signal quality information is larger than the EC/NO and RSCP contained in the first signal quality information, the terminal is switched from the first cell to the second cell;
the cell in which the terminal currently resides is a first cell, and when the EC/NO and/or RSCP contained in the first signal quality information is larger than the EC/NO and RSCP contained in the second signal quality information, the terminal continues to reside in the first cell.
4. The method of any of claims 1-3, wherein before obtaining the first signal quality information when the terminal camps on the first cell and the second signal quality information when the terminal camps on the second cell, the method further comprises:
acquiring current access cell capability information of a terminal, wherein the current access cell capability information comprises: whether DC is supported, whether MIMO is supported; and when the terminal is judged to support the DC and the MIMO according to the current access cell capability information, acquiring first signal quality information when the terminal resides in a first cell and second signal quality information when the terminal resides in a second cell.
5. The method according to any of claims 1-3, wherein the first cell is a dual carrier DC cell and the second cell is a multiple input multiple output, MIMO, cell, or wherein the first cell is a MIMO cell and the second cell is a DC cell.
6. A cell selection apparatus, the selection apparatus comprising:
an obtaining module, configured to obtain first signal quality information when a terminal resides in a first cell and second signal quality information when the terminal resides in a second cell, where a first capability level required for the terminal to access the first cell is different from a second capability level required for the terminal to access the second cell;
the comparison module is used for comparing the first signal quality information with the second signal quality information to obtain a comparison result;
a judging module, configured to judge whether to perform cell handover based on the comparison result;
the adjusting module is used for adjusting the current capability level of the terminal if the judgment result is yes;
the terminal comprises a switching module, a judging module and a judging module, wherein the switching module is used for switching a terminal from a resident current cell to a resident target cell, the current cell is a first cell, and the target cell is a second cell; or, the current cell is a second cell, and the target cell is a first cell;
the device further comprises:
a reducing module, configured to reduce the first capability level of the terminal to the second capability level when the first capability level is higher than the second capability level, and report the first capability level to a network side;
and the providing module is used for increasing the first capability level of the terminal to the second capability level and reporting the first capability level to a network side when the first capability level is lower than the second capability level.
7. The apparatus of claim 6, wherein the obtaining module is configured to obtain, at the first signal quality information and/or the second signal quality information, at least one of: and acquiring first signal quality information when the terminal resides in a first cell and second signal quality information when the terminal resides in a second cell when the ratio EC/NO of the chip energy to the total interference energy density and the received signal code power RSCP are obtained.
8. The apparatus of claim 7, wherein the determining module comprises:
an adjusting unit, configured to switch the terminal from the first cell to the second cell when the cell where the terminal currently resides is the first cell and when EC/NO and/or RSCP included in the second signal quality information is greater than EC/NO and RSCP included in the first signal quality information;
and a camping unit, configured to, when the cell in which the terminal currently camps is a first cell and when the EC/NO and/or RSCP included in the first signal quality information is greater than the EC/NO and RSCP included in the second signal quality information, continue camping on the first cell by the terminal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410404012.0A CN105376820B (en) | 2014-08-15 | 2014-08-15 | Cell selection method and device |
| PCT/CN2014/090836 WO2015154453A1 (en) | 2014-08-15 | 2014-11-11 | Cell selection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410404012.0A CN105376820B (en) | 2014-08-15 | 2014-08-15 | Cell selection method and device |
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| CN101087472A (en) * | 2006-06-09 | 2007-12-12 | 华为技术有限公司 | Method for re-selecting cell of user device |
| CN102223667A (en) * | 2011-07-28 | 2011-10-19 | 电信科学技术研究院 | Methods and devices for measuring and reporting cell signal quality and controlling cell switch |
| CN102457862A (en) * | 2010-10-21 | 2012-05-16 | 中兴通讯股份有限公司 | Method for testing terminal cell reselection ability and apparatus thereof |
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| US7729703B2 (en) * | 2006-04-27 | 2010-06-01 | Motorola, Inc. | Apparatus and method for reporting a channel quality indication to non-serving cells |
| JP4963453B2 (en) * | 2007-08-21 | 2012-06-27 | 株式会社エヌ・ティ・ティ・ドコモ | Wireless communication system, wireless communication method, and wireless terminal |
| CN102017702B (en) * | 2008-04-25 | 2016-01-13 | 交互数字专利控股公司 | For carrying out the method and apparatus of cell reselection in the mobile communication network |
| CN102158924B (en) * | 2011-04-01 | 2013-04-24 | 华为技术有限公司 | Method for reselecting PS (Packet Switched) connected state and terminal |
| EP2787786B1 (en) * | 2011-10-10 | 2018-07-18 | Samsung Electronics Co., Ltd | Method and device for a random access of a secondary cell in a mobile communication system using Carrier Aggregation |
| JP6214667B2 (en) * | 2012-11-02 | 2017-10-18 | テレフオンアクチーボラゲット エルエム エリクソン（パブル） | Method for coordinating mobility settings between RATs |
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| CN101087472A (en) * | 2006-06-09 | 2007-12-12 | 华为技术有限公司 | Method for re-selecting cell of user device |
| CN102457862A (en) * | 2010-10-21 | 2012-05-16 | 中兴通讯股份有限公司 | Method for testing terminal cell reselection ability and apparatus thereof |
| CN102223667A (en) * | 2011-07-28 | 2011-10-19 | 电信科学技术研究院 | Methods and devices for measuring and reporting cell signal quality and controlling cell switch |
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