CN101730164A - Method and terminal for reselecting cell - Google Patents
Method and terminal for reselecting cell Download PDFInfo
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- CN101730164A CN101730164A CN200810201395A CN200810201395A CN101730164A CN 101730164 A CN101730164 A CN 101730164A CN 200810201395 A CN200810201395 A CN 200810201395A CN 200810201395 A CN200810201395 A CN 200810201395A CN 101730164 A CN101730164 A CN 101730164A
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Abstract
The embodiment of the invention discloses a method and a terminal for reselecting a cell. The method comprises the following steps: acquiring aggregation information of an aggregated preferable cell layer, which is sent by a network side; when the signal quality of a serving cell is lower than a common-frequency measured threshold value or a threshold special for an aggregation cell, measuring the signal quality of the cell in the aggregated preferable cell layer according to the aggregation information of the aggregated preferable cell layer; and reselecting the cell according to the measurement result. Because the embodiment of the invention measures the signal quality of the cell in the aggregated preferable cell layer when the signal quality of the serving cell is lower than the common-frequency measured threshold value or the threshold special for the aggregation cell and reselects the cell according to the measurement result, the method can increase the possibility that the terminal residents on the aggregation cell and reduces the probability of switching or redirecting and other operations when the terminal needs to initiate a high-speed service so as to reduce the probability of paging failure.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method of cell reselection and terminal.
Background technology
In order to keep continuous competitiveness, (Third GenerationPartnership Project, 3GPP) be organized in for 2004 ends has formally set up Long Term Evolution (Long TermEvolution, LTE) research project to third generation partnership project.The starting point of LTE is to guarantee the competitiveness in following 10 years of 3GPP, and system is promoted from performance, function, cost comprehensively.In March, 2008,3GPP has started senior Long Term Evolution again, and (Advanced Long Term Evolution, LTE-Advanced) project, its target are to support higher peak rate, higher spectrum efficiency and higher user throughput and number of users.Senior long evolving system is supported carrier aggregation technology, thereby big bandwidth, business at a high speed can be provided.
In the prior art, cell reselection priority is divided into absolute priority (Absolute priority) and terminal-specific priority (UE specific priority), these two kinds of priority all are based on frequency partition, that is to say that the sub-district on the same frequency has equal priority.Wherein, absolute priority is broadcasted in Cell Broadcast CB, and terminal is obtained by reading broadcasting, and network side can also be provided with terminal-specific priority to terminal by dedicated signaling.
In the LTE-Advanced system, introduced the function of polymerization, promptly can be together a plurality of carrier aggregation, for the LTE terminal, an aggregation cell can be regarded a plurality of LTE sub-district as, and for the LTE-Advanced terminal, these carrier waves have been formed a LTE-Advanced aggregation cell together.
According to prior art, if by terminal-specific priority is set, make for the LTE-Advanced terminal, aggregation cell has very high priority, the non-polymeric sub-district identical with the aggregation cell frequency also has the same high priority for this terminal, can not well play the preferential effect of aggregation cell.
Summary of the invention
The embodiment of the invention provides a kind of method of cell reselection and terminal, and the technical scheme of using the embodiment of the invention to provide can increase the possibility of terminal gravity treatment on the aggregation cell.
The purpose of the embodiment of the invention is achieved through the following technical solutions:
A kind of method of cell reselection comprises:
Obtain the aggregation information of the aggregated preferable cell layer of network side transmission;
When the signal quality of Serving cell is lower than common frequency measurement threshold value or aggregation cell proprietary threshold, measure the signal quality of the sub-district in the described aggregated preferable cell layer according to the aggregation information of described aggregated preferable cell layer;
Result according to described measurement carries out the sub-district gravity treatment.
A kind of method of cell reselection comprises:
Obtain the information of the polymerization carrier wave layer of network side transmission;
When the signal quality of service carrier wave when being lower than common frequency measurement threshold value or aggregation cell proprietary threshold, according to the signal quality of the described polymerization carrier wave of the information measurement layer of described polymerization carrier wave layer;
Result according to described measurement carries out the sub-district gravity treatment.
A kind of terminal comprises:
Acquiring unit is used to obtain the aggregation information of the aggregated preferable cell layer that network side sends;
Judging unit is used to judge whether the signal quality of Serving cell is lower than the common frequency measurement threshold value, or is used to judge whether the signal quality of Serving cell is lower than the aggregation cell proprietary threshold;
Measuring unit, be used for when the signal quality of described judgment unit judges Serving cell is lower than common frequency measurement threshold value or aggregation cell proprietary threshold, the aggregation information of the described aggregated preferable cell layer that gets access to according to described acquiring unit is measured the signal quality of the sub-district in the described aggregated preferable cell layer;
The gravity treatment unit is used for carrying out the sub-district gravity treatment according to the result that described measuring unit is measured.
A kind of terminal comprises:
Information acquisition unit is used to obtain the information of the polymerization carrier wave layer that network side sends;
Comparing unit, whether the signal quality that is used for relatively serving carrier wave is lower than the common frequency measurement threshold value, or whether the signal quality that is used for relatively serving carrier wave is lower than the aggregation cell proprietary threshold;
Signal measurement unit, the signal quality that is used for drawing the service carrier wave at described comparing unit is when being lower than common frequency measurement threshold value or aggregation cell proprietary threshold, the signal quality of the described polymerization carrier wave of the information measurement layer of the described polymerization carrier wave layer that obtains according to described information acquisition unit;
Gravity treatment unit, sub-district is used for carrying out the sub-district gravity treatment according to the result that described signal measurement unit is measured.
The above technical scheme that provides from the embodiment of the invention as can be seen, because when the signal quality of Serving cell is lower than common frequency measurement threshold value or aggregation cell proprietary threshold, the sub-district in the meeting measurement aggregated preferable cell layer or the signal quality of carrier wave, carry out the sub-district gravity treatment according to the result who measures, can increase terminal and reside in possibility on the aggregation cell, and then reduced the probability that when terminal need be initiated high speed business, need switch or be redirected to wait operate, thereby also reduced the probability of paging failure.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of method of cell reselection flow chart that the embodiment of the invention one is set forth;
Fig. 2 is a kind of method of cell reselection flow chart that the embodiment of the invention two is set forth;
Fig. 3 is a kind of method of cell reselection flow chart that the embodiment of the invention three is set forth;
Fig. 4 is the composition schematic diagram of a kind of terminal of embodiment of the invention elaboration;
Fig. 5 is the composition schematic diagram of the another kind of terminal of embodiment of the invention elaboration;
Fig. 6 is the composition frame chart of a kind of communication system of embodiment of the invention elaboration;
Fig. 7 is the composition frame chart of the another kind of communication system of embodiment of the invention elaboration.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The embodiment of the invention provides a kind of method of cell reselection and terminal, and the technical scheme of using the embodiment of the invention to provide can increase the possibility of terminal gravity treatment on the aggregation cell.
Because existing the measurement in the criterion, when the signal quality of terminal current service cell less than the threshold value that begins to carry out common frequency measurement, but when beginning to carry out the threshold value of different-frequency measure, terminal is only carried out common frequency measurement and is measured the adjacent area of high priority, and can not measure for all the other carrier waves with equal priority in the aggregation cell at terminal place, have only when the signal quality of terminal current service cell when beginning to carry out the threshold value of different-frequency measure, terminal just can be measured the frequency of identical and low priority.Like this, certain carrier frequency is identical in the current resident aggregation cell of adjacent non-polymeric cell frequency and terminal, for terminal, understands at first gravity treatment to adjacent non-polymeric sub-district, and can gravity treatment in this aggregation cell.But not aggregation cell can not be supported high speed business, therefore, when terminal is initiated high speed business, needs to switch or be redirected to adjacent aggregation cell, can increase like this to connect the time delay of setting up, and also might cause the failure that connects.Therefore, need to propose a kind of method of cell reselection, make that in the aggregation cell coverage increase LTE-Advanced terminal resides in the possibility on the aggregation cell, to reduce the probability of operations such as need switching or be redirected when terminal need be initiated high speed business.
For the LTE-Advanced terminal that resides in the aggregation cell, when the signal quality of terminal current service cell is lower than when beginning to carry out the threshold value of common frequency measurement, not only carry out co-frequency neighbor cell and measure, also need the LTE sub-district of all the other the carrier wave correspondences in the residing aggregation cell of terminal is measured.Thereby when cell selecting, the aggregation cell of all the other the carrier wave correspondences in the residing aggregation cell of terminal can sort together with co-frequency neighbor cell.For the LTE-Advanced terminal, increase the special-purpose amount of bias of aggregation cell, thereby make in sub-district gravity treatment sequencer procedure, increase the possibility of terminal gravity treatment on the aggregation cell.
At first set forth a kind of method of cell reselection.
Embodiment one
Present embodiment has been set forth a kind of method of cell reselection, by this method, can increase the possibility of terminal gravity treatment on the aggregation cell.
Be elaborated below in conjunction with accompanying drawing, referring to Fig. 1, the method for cell reselection that present embodiment is set forth may further comprise the steps:
Step 101: the aggregation information of obtaining the aggregated preferable cell layer of network side transmission;
Network side can be to inform terminal by the method for broadcasting or dedicated signaling to the aggregation information of terminal transmission aggregated preferable cell layer, and terminal is obtained the aggregation information of network side by the aggregated preferable cell layer of broadcasting or dedicated signaling transmission.
After terminal has been obtained the aggregation information of aggregated preferable cell layer, can know and to measure the signal quality of which sub-district in this aggregated preferable cell layer, the corresponding one group of LTE sub-district of aggregated preferable cell layer, each sub-district can uniquely be determined by cell ID, also can by frequency and cell ID is unique determines.
The notion of the above-mentioned aggregated preferable cell layer of mentioning is only effectively inner in the residing aggregation cell of terminal.
Step 102: when the signal quality of Serving cell is lower than common frequency measurement threshold value or aggregation cell proprietary threshold, according to the sub-district in the aggregation information measurement aggregated preferable cell layer of aggregated preferable cell layer or the signal quality of carrier wave;
When the signal quality of the residing current service cell of terminal is lower than when beginning to carry out the threshold value of common frequency measurement, need to measure the signal quality of the sub-district in the aggregated preferable cell layer, terminal can know that needs measure the signal quality of which sub-district according to the aggregation information of the aggregated preferable cell layer of obtaining in the step 101.
When the signal quality of the residing current service cell of terminal is lower than the aggregation cell proprietary threshold, need to measure the signal quality of the sub-district in the aggregated preferable cell layer, terminal can know that needs measure the signal quality of which sub-district according to the aggregation information of the aggregated preferable cell layer of obtaining in the step 101.
Above-mentioned common frequency measurement threshold value is a little less than the aggregation cell proprietary threshold, can just measure the signal quality in the aggregated preferable cell layer like this when the signal quality of judging the residing current service cell of terminal is lower than the aggregation cell proprietary threshold, terminal just can more early be carried out the sub-district gravity treatment.
According to existing protocol, when the signal quality of current service cell is lower than the common frequency measurement threshold value, terminal may only be measured the sub-district with frequency and high priority, terminal can be easy to preferentially choose on the adjacent co-frequency cell, adopt the step 102 of present embodiment to increase the comparison of the signal quality of this aggregation cell and co-frequency neighbor cell afterwards, reside in the interior possibility of aggregation cell thereby increased terminal.
Step 103: the result according to above-mentioned measurement carries out the sub-district gravity treatment.
If the result that terminal is measured in step 102 shows that the signal quality of the sub-district in the aggregated preferable cell layer is very high, terminal can be selected resident to this aggregation cell so.If the result that terminal is measured shows that the signal quality of this aggregation cell is not high, terminal also can be measured the signal quality of the sub-district of co-frequency neighbor cell or high priority so, and then selects the higher sub-district gravity treatment of signal quality according to the result who measures.
If under the situation adjacent of non-polymeric sub-district with aggregation cell, adopt the method for present embodiment, increase terminal and be in the interior possibility of aggregation cell, reduced the probability that is redirected.
If for around be under the situation of aggregation cell, because each LTE sub-district is synchronous in the aggregation cell, and it is not necessarily synchronous between aggregation cell, therefore each intercarrier carries out the time delay of sub-district gravity treatment less than the time delay of carrying out the sub-district gravity treatment between aggregation cell in aggregation cell, adopt the method for present embodiment, just can reduce the number of times of gravity treatment between aggregation cell, thereby reduce the probability of paging failure.
Present embodiment is because when the signal quality of Serving cell is lower than common frequency measurement threshold value or aggregation cell proprietary threshold, can measure the signal quality of the sub-district in the aggregated preferable cell layer, carry out the sub-district gravity treatment according to the result who measures, can increase terminal and reside in possibility on the aggregation cell, and then reduced the probability that when terminal need be initiated high speed business, need switch or be redirected to wait operate, thereby also reduced the probability of paging failure.
Embodiment one has set forth a kind of method of cell reselection, and embodiment two sets forth another kind of method of cell reselection.
Embodiment two
Present embodiment is set forth a kind of method of cell reselection, and by this method, the terminal gravity treatment can be bigger to the possibility in the aggregation cell.
Be elaborated below in conjunction with accompanying drawing, referring to Fig. 2, the method for cell reselection that present embodiment is set forth may further comprise the steps:
Step 201: in the aggregation cell, network side is provided with aggregated preferable cell layer;
After network side was provided with aggregated preferable cell layer, network side was informed the aggregation information that resides in this aggregation cell of terminal in this aggregation cell.
Network side can be the aggregation information of informing this aggregation cell of terminal by the method for broadcasting or dedicated signaling.
After terminal has been obtained the aggregation information of aggregated preferable cell layer, can know and to measure the signal quality of which sub-district in this aggregated preferable cell layer, the corresponding one group of LTE sub-district of aggregated preferable cell layer, each sub-district can uniquely be determined by frequency and Physical Cell Identifier.
The notion of the above-mentioned aggregated preferable cell layer of mentioning is only effectively inner in the residing aggregation cell of terminal.
Step 202: the sub-district in the terminal aggregated preferable cell layer is set to identical priority;
Form because aggregation cell can be regarded as a plurality of LTE sub-district, network side is not necessarily identical to the absolute priority that each carrier wave is provided with, when absolute priority not simultaneously, the sub-district in the aggregated preferable cell layer all is set to identical priority.
The method that is set to identical priority can be after network side is provided with aggregated preferable cell layer, and the native region priority in the LTE-Advanced terminal aggregated preferable cell layer of support polymerization is set to identical priority X.Above-mentioned priority X can be the priority for limit priority LTE sub-district in this aggregation cell, also can be to be higher than the priority of adjacent sub-district but the priority that is not higher than the sub-district of adjacent closed user group.
For example, comprise three LTE sub-districts in the aggregated preferable cell layer, their priority is respectively 4,5,6, its medium priority is that the priority of 4 LTE sub-district is the highest, step 202 can be that priority with the sub-district in the aggregated preferable cell layer all is set to 4 so, also can be that priority with the sub-district in the aggregated preferable cell layer all is set to 2, certainly the priority of the sub-district of adjacent closed user group should be higher than 2 at this moment, for example can be 1, the sub-district of closed user group can be the little base station that family expenses or office use, in LTE, the priority of the sub-district of closed user group may be very high.
The LTE sub-district of aggregated preferable cell layer correspondence is set to identical priority in the residing aggregation cell of LTE-Advanced terminal, make terminal like this when carrying out the sub-district gravity treatment, can measure the sub-district in the aggregated preferable cell layer or the signal quality of carrier wave simultaneously, reside in the possibility of aggregation cell thereby increased terminal, and then also reduced the probability that terminal is redirected when initiating high speed business.
Sub-district in the aggregated preferable cell layer is set to the resident load balancing that identical priority helps the Idle state terminal.
For the LTE-Advanced aggregation cell of forming by a plurality of alien frequencies LTE sub-district,, can better realize the resident load balancing of Idle state terminal as if each alien frequencies LTE native region priority is identical.
The terminal that the resident load balancing of Idle state terminal refers to Idle state might reside on some sub-districts on some frequencies, and can make a call, monitor paging in this sub-district afterwards, and insert at random and paging channel resource all is limited, therefore do not wish that the terminal of a large amount of Idle state all resides on the same sub-district, just need the resident load balancing of Idle state terminal this moment.
Certainly, step 202 is optional steps, also can not carry out such setting.
Step 203: when the signal quality of Serving cell was lower than the common frequency measurement threshold value, terminal also needed to measure the signal quality of the sub-district in the aggregated preferable cell layer;
When the signal quality of the residing Serving cell of terminal is lower than when beginning to carry out the common frequency measurement threshold value, terminal also needs to measure the signal quality of the sub-district in the aggregated preferable cell layer measuring with frequently and in the signal quality of the sub-district of high priority.
Certainly, also can be that terminal is just measured the signal quality of the sub-district in the aggregated preferable cell layer when the signal quality of the residing Serving cell of terminal is lower than the aggregation cell proprietary threshold.Above-mentioned aggregation cell proprietary threshold generally can be a little more than the common frequency measurement threshold value, and terminal just can be measured the signal quality of the sub-district in the aggregated preferable cell layer faster like this, thereby can accelerate the process of terminal gravity treatment to aggregation cell.
According to existing protocol, when the signal quality of current service cell is lower than the common frequency measurement threshold value, terminal may only be measured the sub-district with frequency and high priority, terminal can be easy to preferentially choose on the adjacent co-frequency cell, increased the comparison of the signal quality of this aggregation cell and co-frequency neighbor cell after adopting step 203, resided in the interior possibility of aggregation cell thereby increased terminal.
Step 204: the special-purpose amount of bias of aggregation cell of obtaining aggregated preferable cell layer;
Obtain the special-purpose amount of bias of aggregation cell of aggregated preferable cell layer, in the R criterion, use.Can increase the possibility of terminal gravity treatment in the aggregation cell like this.The criterion of using during ordering when above-mentioned R criterion is sub-district gravity treatment among the LTE is obtained a result according to cell signal quality and some amount of bias, is sorted in each sub-district, and terminal is selected the Target cell of the best sub-district of ranking results as the sub-district gravity treatment.
The above-mentioned method that the special-purpose amount of bias of aggregation cell is set can be that network side is provided with the special-purpose amount of bias of aggregation cell for each carrier wave in this aggregation cell or adjacent polymeric sub-district in system broadcast message or in the dedicated signaling, and the special-purpose amount of bias of above-mentioned aggregation cell can obtain by system emulation or radio resource management algorithms.
Also can use when the R criterion is calculated, thereby improve under the equal priority situation for the adjacent polymeric sub-district is provided with the special-purpose amount of bias of aggregation cell in broadcasting non-polymeric sub-district, and the terminal gravity treatment is to the possibility of aggregation cell.
Because for all the other carrier waves in the aggregation cell increase special-purpose amount of bias, the LTE-Advanced terminal that feasible script resides in the aggregation cell resides in this aggregation cell as far as possible, the LTE-Advanced terminal that originally resides in non-polymeric sub-district also can preferentially select to switch to adjacent aggregation cell when gravity treatment.
Step 205: carry out the sub-district gravity treatment according to result who measures and the special-purpose amount of bias of aggregation cell.
Terminal is obtained a result according to the result that cell signal is measured and the special-purpose amount of bias of aggregation cell when carrying out the sub-district gravity treatment, sorted in each sub-district, and terminal is selected the Target cell of the best sub-district of ranking results as the sub-district gravity treatment.
The embodiment of the invention is because when the signal quality of current service cell is lower than common frequency measurement threshold value or aggregation cell proprietary threshold, the sub-district in the meeting measurement aggregated preferable cell layer or the signal quality of carrier wave, carry out the sub-district gravity treatment according to the result who measures, can increase terminal and reside in possibility on the aggregation cell, and then reduced the probability that when terminal need be initiated high speed business, need switch or be redirected to wait operate, thereby also reduced the probability of paging failure.
Further, sub-district in the aggregated preferable cell layer is set to identical and priority that be higher than adjacent sub-district, terminal can make the terminal gravity treatment further increase so that can preferentially be measured the signal quality of the sub-district in the aggregated preferable cell layer to the possibility of aggregation cell.
Further, can also make the terminal gravity treatment further increase by obtaining the special-purpose amount of bias of aggregation cell to the possibility of aggregation cell.
Set forth a kind of terminal above and measured the signal quality of the sub-district in the aggregated preferable cell layer according to the aggregation information of the aggregated preferable cell layer of obtaining, carry out method of cell reselection according to measurement result, set forth the signal quality of a kind of terminal below, the embodiment that carries out the sub-district gravity treatment according to the result who measures according to the information measurement polymerization carrier wave layer of the polymerization carrier wave layer that obtains.
Embodiment three
Present embodiment has been set forth the signal quality of a kind of terminal according to the information measurement polymerization carrier wave layer of the polymerization carrier wave layer that obtains, and carries out method of cell reselection according to the result who measures.
Step 301: the information of obtaining the polymerization carrier wave layer of network side transmission;
Terminal can be to obtain the information of network side by the polymerization carrier wave layer of broadcasting or dedicated signaling transmission.
The terminal of obtaining the information of polymerization carrier wave layer can be the LTE-Advanced terminal that is in non-polymeric sub-district, also can be the LTE-Advanced terminal in the aggregation cell.
Step 302: when the signal quality of current service carrier wave is lower than common frequency measurement threshold value or aggregation cell proprietary threshold, according to the signal quality of the information measurement polymerization carrier wave layer of polymerization carrier wave layer;
When the signal quality of current service carrier wave was lower than common frequency measurement threshold value or aggregation cell proprietary threshold, terminal need be measured the signal quality of polymerization carrier wave layer.
Can also comprise before step 302: the priority of the carrier wave in the polymerization carrier wave layer is set to identical priority; Step according to the signal quality of the information measurement polymerization carrier wave layer of polymerization carrier wave layer in this moment step 302 is specially: according to the signal quality of the carrier wave with equal priority in the information measurement polymerization carrier wave layer of polymerization carrier wave layer.
The priority of the carrier wave in the polymerization carrier wave layer is set to identical priority, can better realize the resident load balancing of Idle state terminal.
Step 303: the result according to described measurement carries out the sub-district gravity treatment.
Can also comprise the carrier-specific amount of bias of obtaining polymerization carrier wave layer before the step 303; This moment, step 303 was specially: carry out the sub-district gravity treatment according to result and the special-purpose amount of bias measured.
The special-purpose amount of bias of polymerization carrier wave layer can be terminal self storage, also can be the special-purpose amount of bias that network side issues.
Present embodiment is because when the signal quality of current service carrier wave is lower than common frequency measurement threshold value or aggregation cell proprietary threshold, can measure the signal quality of polymerization carrier wave layer, carry out the sub-district gravity treatment according to the result who measures, can increase terminal and reside in possibility on the aggregation cell, and then reduced the probability that when terminal need be initiated high speed business, need switch or be redirected to wait operate, thereby also reduced the probability of paging failure.
Need to prove, for aforesaid each method embodiment, for simple description, so it all is expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not subjected to the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in the specification all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, do not have the part that describes in detail among certain embodiment, can be referring to the associated description of other embodiment.
A kind of method of cell reselection more than is provided, and the embodiment of the invention also provides terminal and a kind of communication system.
At first set forth a kind of terminal, be elaborated below in conjunction with accompanying drawing, referring to Fig. 4, a kind of terminal comprises with lower unit:
Acquiring unit 401 is used to obtain the aggregation information of the aggregated preferable cell layer that network side sends;
Acquiring unit 401 can be to obtain the aggregation information of network side by the aggregated preferable cell layer of broadcasting or dedicated signaling transmission.
Judging unit 402 is used to judge whether the signal quality of Serving cell is lower than the common frequency measurement threshold value, or is used to judge whether the signal quality of Serving cell is lower than the aggregation cell proprietary threshold;
Judging unit 402 can be whether the signal quality of judging the residing Serving cell of terminal is lower than the threshold value that begins to carry out common frequency measurement, also can be whether the signal quality of judging the residing Serving cell of terminal is lower than the aggregation cell proprietary threshold.Above-mentioned aggregation cell proprietary threshold is a little more than the common frequency measurement threshold value, and it is more Zao than the judged result that the signal quality that draws the residing current service cell of terminal is lower than the common frequency measurement threshold value that the signal quality that promptly draws the residing current service cell of terminal is lower than the judged result of aggregation cell proprietary threshold.
Measuring unit 403, be used for when judging unit 402 judges that the signal quality of Serving cells is lower than common frequency measurement threshold value or aggregation cell proprietary threshold, the aggregation information of the aggregated preferable cell layer that gets access to according to acquiring unit 401 is measured the signal quality of the sub-district in the aggregated preferable cell layer;
Terminal is carrying out can increasing the possibility that aggregation cell is arrived in the terminal gravity treatment like this with frequently and will measure the signal quality of the sub-district in the aggregated preferable cell layer in high priority sub-district signal quality measured after drawing above-mentioned judged result.
Terminal can be obtained a result according to the cell signal quality and some amount of bias that measure, is sorted in each sub-district, and terminal is selected the Target cell of the best sub-district of ranking results as the sub-district gravity treatment then.
Above-mentioned terminal can also comprise: the unit is set, and the priority that is used for the sub-district of aggregated preferable cell layer is set to identical priority;
The aggregation information that measuring unit 403 is used for the aggregated preferable cell layer obtained according to acquiring unit 401 measure aggregated preferable cell layer by the above-mentioned signal quality that the aggregation cell with equal priority of unit setting is set.
Above-mentioned terminal can be used to realize a kind of method of cell reselection of the embodiment of the invention one and embodiment two elaborations, but is not limited to realize this method.
Referring to Fig. 5, a kind of terminal comprises:
Comparing unit 502, whether the signal quality that is used for relatively serving carrier wave is lower than the common frequency measurement threshold value, or whether the signal quality that is used for relatively serving carrier wave is lower than the aggregation cell proprietary threshold;
Gravity treatment unit, sub-district 504 is used for carrying out the sub-district gravity treatment according to the result that signal measurement unit 503 is measured.
Wherein, above-mentioned terminal also comprises:
The amount of bias acquiring unit is used to obtain the special-purpose amount of bias of polymerization carrier wave layer;
Gravity treatment unit, above-mentioned sub-district 504 is used for the special-purpose amount of bias that the result that measures according to signal measurement unit 503 and amount of bias acquiring unit obtain and carries out the sub-district gravity treatment.
Above-mentioned terminal can be used to realize a kind of method of cell reselection of embodiment three elaborations, but is not limited to realize this method.
Referring to Fig. 6, a kind of communication system comprises with lower device:
Wherein, above-mentioned network side 601 also is used to sub-district or carrier wave in the aggregated preferable cell layer that the special-purpose amount of bias of aggregation cell is set;
Above-mentioned terminal 602 also is used for carrying out the sub-district gravity treatment according to the special-purpose amount of bias of aggregation cell of result who measures and network side 601 settings.
Wherein, above-mentioned terminal 602 also is used for the sub-district of aggregated preferable cell layer or the priority of carrier wave is set to identical priority.
Above-mentioned communication system can be used to realize method of cell reselection, but is not limited to realize this method.
Referring to Fig. 7, a kind of communication system comprises:
Wherein, above-mentioned terminal 702 also is used to described polymerization carrier wave layer that special-purpose amount of bias is set.
The embodiment of the invention is because when the signal quality of Serving cell is lower than common frequency measurement threshold value or aggregation cell proprietary threshold, can measure the signal quality of the sub-district in the aggregated preferable cell layer, carry out the sub-district gravity treatment according to the result who measures, can increase terminal and reside in possibility on the aggregation cell, and then reduced the probability that when terminal need be initiated high speed business, need switch or be redirected to wait operate, thereby also reduced the probability of paging failure.
Further, sub-district in the aggregated preferable cell layer is set to identical and priority that be higher than adjacent sub-district, terminal can make the terminal gravity treatment further increase so that can preferentially be measured the signal quality of the sub-district in the aggregated preferable cell layer to the possibility of aggregation cell.
Further, can also make the terminal gravity treatment further increase by obtaining the special-purpose amount of bias of aggregation cell to the possibility of aggregation cell.
The embodiment of the invention is because when the signal quality of service carrier wave is lower than common frequency measurement threshold value or aggregation cell proprietary threshold, can measure the signal quality of polymerization carrier wave layer, carry out the sub-district gravity treatment according to the result who measures, can increase terminal and reside in possibility on the aggregation cell, and then reduced the probability that when terminal need be initiated high speed business, need switch or be redirected to wait operate, thereby also reduced the probability of paging failure.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises the steps: when carrying out
Obtain the aggregation information of the aggregated preferable cell layer of network side transmission;
When the signal quality of Serving cell is lower than common frequency measurement threshold value or aggregation cell proprietary threshold, measure the signal quality of the sub-district in the above-mentioned aggregated preferable cell layer according to the aggregation information of above-mentioned aggregated preferable cell layer;
Result according to above-mentioned measurement carries out the sub-district gravity treatment.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
More than a kind of method of cell reselection and terminal that the embodiment of the invention provided are described in detail, the explanation of above embodiment just is used for help understanding method of the present invention and thought thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (12)
1. a method of cell reselection is characterized in that, comprising:
Obtain the aggregation information of the aggregated preferable cell layer of network side transmission;
When the signal quality of Serving cell is lower than common frequency measurement threshold value or aggregation cell proprietary threshold, measure the signal quality of the sub-district in the described aggregated preferable cell layer according to the aggregation information of described aggregated preferable cell layer;
Result according to described measurement carries out the sub-district gravity treatment.
2. method of cell reselection according to claim 1 is characterized in that, further comprises:
The priority of the sub-district in the described aggregated preferable cell layer is set to identical priority; The signal quality that described aggregation information according to described aggregated preferable cell layer is measured the sub-district in the described aggregated preferable cell layer is specially:
Measure the signal quality of the aggregation cell in the described aggregated preferable cell layer with equal priority according to the aggregation information of described aggregated preferable cell layer.
3. method of cell reselection according to claim 2 is characterized in that, the priority of the sub-district in the described aggregated preferable cell layer is set to identical priority and is specially:
The priority of the sub-district in the described aggregated preferable cell layer is set to have in the described aggregated preferable cell layer priority that the priority of the priority of Long Term Evolution sub-district of limit priority or the sub-district in the described aggregated preferable cell layer is set to be higher than the priority of adjacent sub-district and is not higher than the sub-district of adjacent closed user group.
4. according to each described method of cell reselection of claim 1 to 3, it is characterized in that, further comprise:
Obtain the special-purpose amount of bias of aggregation cell of described aggregated preferable cell layer;
Described result according to described measurement carries out the sub-district gravity treatment and is specially:
Result and the special-purpose amount of bias of described aggregation cell according to described measurement are carried out the sub-district gravity treatment.
5. method of cell reselection according to claim 4 is characterized in that, the described special-purpose amount of bias of aggregation cell of obtaining aggregated preferable cell layer is by the arbitrary special-purpose amount of bias of described aggregation cell that obtains in system emulation or the radio resource management algorithms.
6. a method of cell reselection is characterized in that, comprising:
Obtain the information of the polymerization carrier wave layer of network side transmission;
When the signal quality of service carrier wave when being lower than common frequency measurement threshold value or aggregation cell proprietary threshold, according to the signal quality of the described polymerization carrier wave of the information measurement layer of described polymerization carrier wave layer;
Result according to described measurement carries out the sub-district gravity treatment.
7. method of cell reselection according to claim 6 is characterized in that, further comprises:
The priority of the carrier wave in the described polymerization carrier wave layer is set to identical priority;
The signal quality of the described described polymerization carrier wave of information measurement layer according to described polymerization carrier wave layer is specially:
Signal quality according to the carrier wave in the described polymerization carrier wave of the information measurement layer of described polymerization carrier wave layer with equal priority.
8. method of cell reselection according to claim 6 is characterized in that, further comprises:
Obtain the carrier-specific amount of bias of described polymerization carrier wave layer;
Described result according to described measurement carries out the sub-district gravity treatment and is specially:
Result and described special-purpose amount of bias according to described measurement are carried out the sub-district gravity treatment.
9. a terminal is characterized in that, comprising:
Acquiring unit is used to obtain the aggregation information of the aggregated preferable cell layer that network side sends;
Judging unit is used to judge whether the signal quality of Serving cell is lower than the common frequency measurement threshold value, or is used to judge whether the signal quality of Serving cell is lower than the aggregation cell proprietary threshold;
Measuring unit, be used for when the signal quality of described judgment unit judges Serving cell is lower than common frequency measurement threshold value or aggregation cell proprietary threshold, the aggregation information of the described aggregated preferable cell layer that gets access to according to described acquiring unit is measured the signal quality of the sub-district in the described aggregated preferable cell layer;
The gravity treatment unit is used for carrying out the sub-district gravity treatment according to the result that described measuring unit is measured.
10. terminal according to claim 9 is characterized in that, also comprises:
The unit is set, and the priority that is used for the sub-district of described aggregated preferable cell layer is set to identical priority;
The aggregation information that described measuring unit is used for the described aggregated preferable cell layer obtained according to described acquiring unit measure described aggregated preferable cell layer by the described signal quality that the aggregation cell with equal priority of unit setting is set.
11. a terminal is characterized in that, comprising:
Information acquisition unit is used to obtain the information of the polymerization carrier wave layer that network side sends;
Comparing unit, whether the signal quality that is used for relatively serving carrier wave is lower than the common frequency measurement threshold value, or whether the signal quality that is used for relatively serving carrier wave is lower than the aggregation cell proprietary threshold;
Signal measurement unit, the signal quality that is used for drawing the service carrier wave at described comparing unit is when being lower than common frequency measurement threshold value or aggregation cell proprietary threshold, the signal quality of the described polymerization carrier wave of the information measurement layer of the described polymerization carrier wave layer that obtains according to described information acquisition unit;
Gravity treatment unit, sub-district is used for carrying out the sub-district gravity treatment according to the result that described signal measurement unit is measured.
12. terminal according to claim 11 is characterized in that, also comprises:
The amount of bias acquiring unit is used to obtain the special-purpose amount of bias of described polymerization carrier wave layer;
Gravity treatment unit, described sub-district is used for the described special-purpose amount of bias that the result that measures according to described signal measurement unit and described amount of bias acquiring unit obtain and carries out the sub-district gravity treatment.
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| CN 200810201395 CN101730164B (en) | 2008-10-17 | 2008-10-17 | Method and terminal for reselecting cell |
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