CN103974452A - Method and device for radio resource control connection reestablishment - Google Patents
Method and device for radio resource control connection reestablishment Download PDFInfo
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- CN103974452A CN103974452A CN201310032608.8A CN201310032608A CN103974452A CN 103974452 A CN103974452 A CN 103974452A CN 201310032608 A CN201310032608 A CN 201310032608A CN 103974452 A CN103974452 A CN 103974452A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The embodiment of the invention provides a method and device for radio resource control connection reestablishment in a heterogeneous network. The heterogeneous network comprises one or more macro base stations, one or more small base stations and one or more user equipment. The method comprises the steps of obtaining the configuration scene information of the small base stations and determining one or more timer values based on the configuration scene information, wherein the timer values are used for radio resource control connection reestablishment of the user equipment. According to the method and device, a timer can be flexibly configured, so that the success rate of radio resource control connection reestablishment is increased, and power consumption of the user equipment is lowered.
Description
Technical field
Embodiments of the present invention relate generally to radio communication.More specifically, embodiments of the present invention relate to the method and apparatus of controlling (Radio ResourceControl is called for short " RRC ") connection re-establishment for the Radio Resource of heterogeneous network.
Background technology
In the current heterogeneous network being formed by macro base station (or macrocell) and small base station (as Pico, Femto base station or community etc.), control Radio Link Failure (Radio Link Failure, abbreviation " RLF ") in process, can use two important timers, i.e. timer T310 and T311.Wherein, the duration of timer T310 is the important parameter that has influence on RLF, and because it is gone back and the closely association of handoff failure (Handover Failure is called for short " HOF ") process, it also can have influence on HOF and lead.By timer T310 is reasonably set, can correspondingly improve the mobility performance of heterogeneous network.T311 timer is also important RLF parameter, and it can have influence on RRC connection re-establishment process significantly.According to 3GPP TS36.331, once RRC connection re-establishment process starts, T311 timer will start timing, and when subscriber equipment (UE) has been selected suitable Target cell (or base station), T311 timer will stop timing.Once T311 timer expires, UE is not also linked into Target cell, and UE will leave RRC_CONNECTED pattern and enter into RRC_IDLE pattern.
For the ease of understanding, below in conjunction with Fig. 1 of schematically illustrated RLF model, above-mentioned timer T310 and T311 are described further.As shown in fig. 1, in wireless communication procedure, will whether exist potential problems to detect to wireless link, for example, by carrying out channel quality measurement to obtain CQI (CQI).The triggering of timer T310 and the process of replacement is exemplary is described below:
First, as CQI < Q
outtime trigger timer T310, and if the process that now switches, and to after date, there is no successful switch at timer T310, will there is RLF, thereby trigger timer T311;
Secondly, if CQI does not return to CQI > Q when timer T310 reaches preset value (as 1 second)
in, timer T310 resets to 0.After timer T310 resets to 0, when CQI deteriorates into CQI < Q again
outtime, can again trigger timer T310 again, and at timer T310 to after date, will there is RLF, thereby trigger timer T311.Here, Q
outand Q
inpredefined threshold value, and conventionally respectively value be-8dB and-6dB.
After timer T311 triggers, UE should be linked into Target cell in the duration of timer T311 timing, here " Target cell " is no longer Target cell selected while carrying out handoff procedure, but RRC connection re-establishment process triggers rear selected Target cell.If successfully access Target cell, UE will keep RRC_CONNECTED pattern, otherwise as mentioned above, UE will leave RRC_CONNECTED pattern and enter into RRC_IDLE pattern.
The single default value of T311 timer is aimed at that the homogeneous network of the macro base station that comprises single type optimizes, and it can not meet the demand that the heterogeneous network of RRC connection re-establishment may frequently occur.Consider the network configuration characteristic of heterogeneous network, be especially deployed with intensive small base station or the scene of community, T311 timer produces significant impact by the mobility performance on RRC connection re-establishment and heterogeneous network.
For example, in only having disposed the homogeneous network of macro base station, UE carries out the measurement to all frequencies to be searched conventionally.In the coverage of whole service macrocell, all frequency channels of broadcast can obtain.Yet in heterogeneous network, in the coverage of macrocell, a plurality of small cell may have a plurality of frequencies, and these frequencies may be unknown for UE.In this case, in order to find suitable Target cell, UE searches for several frequencies and for those non-small cell of having planned in advance, searching for its frequency will need the more time by having to according to broadcast message.Current T311 default value is to arrange for the homogeneous network that only comprises macro base station, and duration is 1 second.Yet, for heterogeneous network, the scene that particularly comprises the small base station of intensive deployment, UE is possibly in so short duration cannot find suitable Target cell, thereby probably causes the RRC connection re-establishment of UE unsuccessfully to have to enter into RRC_IDLE state.For UE, enter into RRC_IDLE state and obviously do not expect.
Further, according to current RRC connection re-establishment standard, Target cell selection course is the action centered by UE, and Target cell is that the measurement based on himself is selected by UE.Consider in fact in heterogeneous network, UE is probably switched to soon again another community after re-establishing the community that UE selects, and from network side, the Target cell selection scheme centered by such UE may be poor efficiency.
Therefore the method and apparatus that, needs a kind of RRC connection re-establishment for heterogeneous network in prior art.Utilize the method and equipment, can realize the flexible configuration to T311 timer, thereby improve the success rate of RRC connection re-establishment, and the power consumption of further saving UE, the lifting that brings the mobility performance of network level.
Summary of the invention
In order effectively to alleviate or to solve at least some technical problems above, embodiments of the present invention provide the effective mechanism of flexible configuration T311 timer value, thereby significantly improve the efficiency of RRC connection re-establishment and the chance of wireless link recovery.
One aspect of the present invention provides a kind of method of the RRC connection re-establishment for heterogeneous network, and described heterogeneous network comprises at least one macro base station, at least one small base station and at least one UE.The method comprises the configuration scene information that obtains described at least one small base station.The method also comprises based on described configuration scene information determines at least one timer value, and wherein said at least one timer value is for the RRC connection re-establishment of described at least one UE.
According to an embodiment of the invention, wherein said configuration scene information comprises following at least one: the positional information of described small base station, the distribution density information of described small base station and the range information of described small base station and described macro base station.
According to another implementation of the invention, the method further comprises and obtains the motion state information of described at least one UE and determine described at least one timer value based on described configuration scene information and described motion state information.
According to another execution mode of the present invention, wherein said motion state information comprises the motion velocity information of described at least one UE and at least one in movement position information.
According to another execution mode of the present invention, wherein, when determining a plurality of timer value, described method further comprises: the motion state information based on described at least one UE and adjacent one or more candidate's macro base stations thereof or the configuration scene information of small base station are determined the frequency band shielding; And the motion state information of the frequency band based on described shielding, at least one UE and adjacent one or more candidate's macro base stations thereof or the configuration scene information of small base station select final timer value for the RRC connection re-establishment of described at least one UE from a plurality of timer values, wherein, in described RRC connection re-establishment process, described at least one UE will not search for the frequency band of described shielding.
Another aspect of the present invention provides a kind of method of the RRC connection re-establishment for heterogeneous network, and described heterogeneous network comprises at least one macro base station, at least one small base station and at least one UE.The method is included as described at least one UE and configures one or more candidate's timer values.The method also comprises according to the motion state information of described at least one UE and described one or more candidate's timer value determines final timer value, and wherein this final timer value is for the RRC connection re-establishment of described at least one UE.
According to an embodiment of the invention, wherein when for candidate's timer value of described at least one UE configuration, this candidate's timer value is determined according to the configuration scene information of described at least one small base station by described at least one macro base station, described method further comprises: according to described motion state information, regulate described candidate's timer value, to determine described final timer value.
According to another implementation of the invention, wherein said motion state information comprises the motion velocity information of described at least one UE and at least one in movement position information.
According to another execution mode of the present invention, wherein, when configuring a plurality of candidate's timer value for described at least one UE, described method further comprises to be obtained the configuration scene information of described at least one small base station and from described a plurality of candidate's timer values, selects described final timer value according to described motion state information and described configuration scene information.
According to another execution mode of the present invention, wherein said configuration scene information comprises following at least one: the positional information of described small base station, the distribution density information of described small base station and the range information of described small base station and described macro base station.
One aspect of the present invention provides a kind of equipment of the RRC connection re-establishment for heterogeneous network, and described heterogeneous network comprises at least one macro base station, at least one small base station and at least one UE.Described equipment comprises acquisition device, is configured for the configuration scene information that obtains described at least one small base station.This equipment also comprises determining device, is configured for based on described configuration scene information and determines at least one timer value, and wherein said at least one timer value is for the RRC connection re-establishment of described at least one UE.
Another aspect of the present invention provides a kind of equipment of the RRC connection re-establishment for heterogeneous network, and described heterogeneous network comprises at least one macro base station, at least one small base station and at least one UE.Described equipment comprises inking device, is configured to described at least one UE and configures one or more candidate's timer values.This equipment also comprises determining device, be configured for according to the motion state information of described at least one UE and described one or more candidate's timer value and determine final timer value, wherein this final timer value is for the RRC connection re-establishment of described at least one UE.
By the method and apparatus of the RRC connection re-establishment for heterogeneous network of the present invention, can the timer for RRC connection re-establishment be configured neatly, thereby improve success rate and the efficiency of RRC connection re-establishment, the raising that brings thus communication system integrated moving performance.Further, owing to coming from the auxiliary of network side, UE can only carry out a small amount of frequency search in RRC connection re-establishment process, thereby saves the power consumption of UE.
Accompanying drawing explanation
According to the detailed description of the illustrative embodiments below in conjunction with accompanying drawing, above and other object of the present invention, Characteristics and advantages will become obviously, in the accompanying drawings:
Fig. 1 is the schematic RLF model under heterogeneous network, wherein shows timer T311;
Fig. 2 schematically shows the heterogeneous network framework that wherein can apply embodiments of the present invention;
Fig. 3 is the flow chart schematically showing according to the method for the RRC connection re-establishment for heterogeneous network of one embodiment of the present invention;
Fig. 4 is the flow chart that schematically shows the method for the RRC connection re-establishment for heterogeneous network of another execution mode according to the present invention;
Fig. 5 illustrates according to the high speed UE of embodiment of the present invention, under heterogeneous network shown in Fig. 2, to carry out the schematic diagram of RRC connection re-establishment;
Fig. 6 illustrates according to the low speed/middling speed UE of embodiment of the present invention under heterogeneous network shown in Fig. 2, to carry out the schematic diagram of RRC connection re-establishment;
Fig. 7 is the schematic diagram of carrying out RRC connection re-establishment the network assistance in the situation that illustrating according to embodiment of the present invention;
Fig. 8 is the block diagram schematically showing according to the equipment of the RRC connection re-establishment for heterogeneous network of one embodiment of the present invention; And
Fig. 9 is the block diagram that schematically shows the equipment of the RRC connection re-establishment for heterogeneous network of another execution mode according to the present invention.
Embodiment
The give chapter and verse motion state information of UE or the position scene information of its adjacent small base station or community configures or determine one or more candidate's timer values of some embodiments of the present invention, to further determine the final timer value of the RRC connection re-establishment that is applicable to UE from these candidate's timer values.Other execution modes of the present invention propose as the pre-configured one or more candidate's timer values of UE, and UE can be identified for according to the configuration scene information of its motion state information or small base station the final timer value of its RRC connection re-establishment.
In embodiments of the present invention, the motion state information of UE for example can comprise motion velocity information and the movement position information of UE.For motion velocity information, it for example can be divided into Three Estate: at a high speed, middling speed and low speed.In general, when UE moves with 60 kilometers/hour or above speed, can claim it in fast state.When UE moves with the speed of 30 kilometers/hour～60 kilometers/hour, can claim it in middling speed state.And when UE moves with 30 kilometers/hour or following speed, can claim it in lower-speed state.Due to the difference of speed, UE also can be different through the time of different districts.Therefore rational T311 timer value need to be set, to be linked into desirable Target cell in RRC connection re-establishment process.For movement position information, it for example can comprise that current UE is apart from distance, orientation and the possible motion track of macrocell or small cell.
In embodiments of the present invention, the configuration scene information of small base station can comprise at least one in the distribution density information of the positional information of described small base station, described small base station and the range information of described small base station and described macro base station.In addition, in embodiments of the present invention, macro base station also can have similar configuration scene information, such as its positional information and with range information of small base station etc.
Below in conjunction with corresponding accompanying drawing, describe a plurality of execution mode of the present invention in detail.
Fig. 2 schematically shows the heterogeneous network framework that wherein can apply embodiments of the present invention.As shown in Figure 2, this heterogeneous network comprises macro base station eNB, a plurality of public small cell (or small base station) and by 1 user who moves to small cell 2 from small cell, it carries UE.
Although do not illustrate in the drawings, it should be understood that here for the sake of simplicity the object with example, only show an eNB with and coverage under a plurality of small cell, and actual heterogeneous network will be more complicated than shown here, it can comprise a plurality of eNB and numerous small cell.These small cell both can be positioned at the coverage of macrocell, to improve the volume of business of wireless network, also can be positioned at the coverage edge of macrocell, to expand the coverage of macrocell.
As previously mentioned, when UE moves in heterogeneous network as shown in Figure 2, according to the difference of its speed, may be provided with different T311 timer values, for UE, also be linked into efficiently flexibly suitable Target cell.For example, for the UE in fast state, conventionally do not wish that it re-establishes or be switched to small cell, even because it is linked into small cell, due to high-speed mobile, it will leave this small cell very soon, thereby trigger handoff procedure.When handoff failure, RLF will be there is, thereby RRC connection re-establishment process need to be again carried out.Owing to switching frequently, extra signaling consumption will be caused, and RRC connection re-establishment process after handoff failure needs to consume extra Radio Resource and user's power consumption, therefore the setting of T311 timer should be considered the time that UE passes through small cell or spent by the formed focuses in a plurality of intensive small cell (hotspot), to guarantee before T311 timer expires, UE can move out the coverage of small cell and select macro base station as Target cell.
For the UE in middling speed/lower-speed state, consider the advantage of small cell aspect business unloading (Traffic Offloading), expectation UE is connected to small cell in RRC connection re-establishment process, as long as link condition is enough good.Therefore the setting of T311 timer should be considered, for the time of small cell search and selection, to guarantee before T311 timer expires, and UE can search a suitable small cell, particularly when the configuration scene information of the unknown small cell of UE.In this case, UE can come only its not far a plurality of small cell of detection range according to the T311 timer arranging, to select one of them suitable small cell as Target cell.
Except above-mentioned UE speed may have influence on the setting of T311 timer value, the configuration scene information of small cell (for example distribution density and position) also will affect the setting of T311 timer.For example, the focus that moves through the small cell with intensive deployment as UE is when (as four in Fig. 2 public small cell form), if now RLF betides in small cell 1, if for example Reference Signal Received Power based on UE (be called for short " RSRP ") is measured, select grand eNB as target BS (or community) and non-selection small cell 2 as Target cell, when UE moves to small cell 2, it will be switched to small cell 2 from macrocell again, obviously like this from small cell, 1 be switched to macrocell, twice handoff procedure that is switched to small cell 2 from macrocell is again not expectation.Therefore, can consider relatively longer by T311 set timer, thus UE more likely by wireless link recovery to small cell 2.
From the description in conjunction with Fig. 2 above, can find out, the configuration scene information of small base station and the movement position information of UE are to determine the key factor of T311 timer length.For this reason, embodiments of the present invention have proposed the basic scheme and the expansion in a plurality of execution modes and the alternative that go out as shown in Figure 3 and Figure 4.
Fig. 3 is the flow chart schematically showing according to the method 300 of the RRC connection re-establishment for heterogeneous network of one embodiment of the present invention, wherein said heterogeneous network can be the heterogeneous network going out as shown in Figure 2, and it can comprise at least one macro base station, at least one small base station and at least one UE.
As shown in Figure 3, in step S301, method 300 is obtained the configuration scene information of described at least one small base station.As previously mentioned, the configuration scene information of this small base station can for example comprise the distribution density information of the positional information of described small base station, described small base station or the range information of described small base station and described macro base station.These information both can preset in the network planning stage, also can, in follow-up radio communication, by means such as signal, position measurement or frequency acquisitions, obtain.
Then, in step S302, method 300 is determined at least one timer value based on described configuration scene information, and wherein said at least one timer value is for the RRC connection re-establishment of described at least one UE.For example aforementioned described in conjunction with Figure 2, when determine candidate's target small base station with respect to macro base station closer to the position of UE or candidate's target small base station in hotspot location place, UE can determine that described timer value should arrange relatively longerly, so that can be linked into small base station in RRC connection re-establishment.
Although not shown, in one embodiment, method 300 further comprises to be obtained the motion state information of described at least one UE and determines described at least one timer value based on aforementioned arrangements scene information and described motion state information.Here, described motion state information for example can comprise the motion velocity information of described at least one UE and at least one in movement position information.Similarly, the information of above-mentioned two types can be determined by network, for example, by the relevant feedback signal of monitoring UE, determine its motion track or circuit in the moving process of UE.
In another embodiment, when method 300 has been determined a plurality of timer value in step S301, its further the configuration scene information of the motion state information based on described at least one UE and adjacent one or more candidate's macro base stations or small base station determine the frequency band of shielding.Then, the frequency band that method 300 can be based on described shielding, the motion state information of at least one UE and adjacent one or more candidate's macro base stations thereof or the configuration scene information of small base station select final timer value for the RRC connection re-establishment of described at least one UE from a plurality of timer values, wherein, in described RRC connection re-establishment process, described at least one UE will not search for the frequency band of described shielding.In this way, UE will no longer search for and be not suitable for the frequency band as Target cell, thereby further saves power consumption and improve the efficiency of RRC connection re-establishment.
By manner of execution 300 with and expansion and alternative in a plurality of execution modes as above, can configure neatly one or more suitable timer values for UE, make UE within the time period of suitable timer value, according to the network scenarios of its present position or present position, to select best Target cell or base station, thereby significantly improved the success rate of wireless link recovery.Further, owing to carrying out the auxiliary of automatic network, UE can avoid too much unnecessary frequency of search in RRC connection re-establishment process, thus the power consumption of advantageously having saved UE.Meanwhile, due to reducing of search rate, RRC connection re-establishment process also correspondingly shortens, thereby has further improved communication efficiency.
Fig. 4 is the flow chart that schematically shows the method 400 of the RRC connection re-establishment for heterogeneous network of another execution mode according to the present invention, wherein said heterogeneous network can be the heterogeneous network going out as shown in Figure 2 equally, and it can comprise at least one macro base station, at least one small base station and at least one UE.As shown in Figure 4, at step S401 place, method 400 configures one or more candidate's timer values for described at least one UE.The configuration here can be for example to set in advance in UE, also can transmit by means of dedicated signaling.
Then, at step S402 place, according to the motion state information of described at least one UE and described one or more candidate's timer value, determine final timer value, wherein this final timer value is for the RRC connection re-establishment of described at least one UE.
Although not shown, in one embodiment, wherein when for candidate's timer value of described at least one UE configuration, this candidate's timer value is determined according to the configuration scene information of described at least one small base station by described at least one macro base station, method 400 may further include according to described motion state information and regulates described candidate's timer value, to determine described final timer value.For example, when network is that UE is while having configured a suitable timer value, UE can determine a scale factor based on speed according to its current translational speed or orientation, and utilizes this scale factor to regulate the timer value of this configuration, thereby obtains more suitable timer value.As previously mentioned, the motion state information here can comprise the motion velocity information of described at least one UE and at least one in movement position information.
In one embodiment, when configuring a plurality of candidate's timer value for described at least one UE, described method 400 may further include to be obtained the configuration scene information of described at least one small base station and from described a plurality of candidate's timer values, selects described final timer value according to described motion state information and described configuration scene information.That is to say, the positional information of the motion state information that UE can estimate according to himself and the target small cell of knowing in advance or a plurality of candidate's timer values that closeness information comes critic network to provide in advance, to therefrom select a suitable timer value.Here, the configuration scene information of small base station can comprise at least one of the distribution density information of the positional information of described small base station, described small base station and the range information of described small base station and described macro base station.
By manner of execution 400 with and expansion and alternative in a plurality of execution modes as above, UE can select suitable timer value in heterogeneous network environment, thereby can in different communication scenes, be connected to best Target cell or base station, significantly improve thus the success rate of wireless link recovery, overcome simultaneously the potential problems that single timer value brings are set in homogeneous network.
Fig. 5 illustrates according to the high speed UE of embodiment of the present invention, under heterogeneous network shown in Fig. 2, to carry out the schematic diagram of RRC connection re-establishment.As shown in Figure 5, the region that the UE that is arranged in the vehicle of running at high speed covers the focus through consisting of a plurality of small cell and the coverage of eNB.Suppose that now RLF occurs UE, it will carry out RRC connection re-establishment process.UE in considering at a high speed will, soon through hot spot region, preferably be connected to macro base station eNB.Otherwise as previously mentioned, after a small base station in being connected to focus, UE will leave this small base station again at short notice, it will have to again carry out switching or connection re-establishment operation, and this does not obviously expect.For this reason, can utilize method 300 and 400 to determine a suitable timer value, to guarantee that the UE in high-speed mobile can be connected to eNB.For example, can be after having considered the translational speed of UE and the position of focus and distribution density situation, for a T311 timer value longer with respect to homogeneous network of UE configuration, thereby UE can have time enough pass hot spot region and successfully select macro base station as Target cell, to realize best RRC connection re-establishment.
Fig. 6 illustrates according to the low speed/middling speed UE of embodiment of the present invention under heterogeneous network shown in Fig. 2, to carry out the schematic diagram of RRC connection re-establishment.As shown in Figure 6, be arranged in region that UE that low speed/middling speed moves covers the focus through consisting of a plurality of small cell and the coverage of eNB.Suppose that now RLF occurs UE, it will carry out RRC connection re-establishment process.Consider that UE in low speed will enter into hot spot region and because its speed is lower, it probably stops the longer time in focus, preferably be connected to a small base station in hot spot region, thereby can realize business unloading, and the distance according to small base station apart from macro base station, realizes the lifting to the coverage extension of macro base station and business throughput.For this reason, can utilize method 300 and 400 to determine a suitable timer value, to guarantee that the UE of low speed/middling speed in moving can be connected to eNB.For example, can be after having considered the translational speed of UE and the position of focus and distribution density situation, for a T311 timer value longer with respect to homogeneous network of UE configuration, thereby UE can successfully select small cell as Target cell, to realize best RRC connection re-establishment.Because small cell may be unknown for UE, long T311 timer value also guarantees that UE has time enough to remove frequency search.Further, owing to can utilizing the Shielding plan in method 300 to mask unnecessary frequency, also can save the power consumption that UE causes due to unnecessary frequency search.
Fig. 7 is the schematic diagram of carrying out RRC connection re-establishment the network assistance in the situation that illustrating according to embodiment of the present invention, and the network assistance here refers to aforesaid frequency masks scheme.
As is known to the person skilled in the art, in current RRC connection re-establishment standard, the selection of Target cell is centered by the action of UE, that is, the selection of Target cell is pre-configured and measured based on it by UE.In heterogeneous network, small base station or community are to be deployed as a plurality of layers with different distribution densities, to realize the expansion of business unloading or coverage.In order to improve RLF, revert to power and save Radio Resource and power, be desirably in RRC connection re-establishment process, heterogeneous network can indicate UE to return to have the link with macrocell frequency or small cell frequency overlap.For this reason, the present invention proposes speed that network can be based on UE or position (being motion state information) and adjacent small cell or the frequency (one of configuration scene information) of macrocell and masks some frequency, to stop UE to search for these unnecessary frequencies.Result is that UE will only search for the frequency of being advised by network and the Target cell of selecting expectation.
Take shown in Fig. 7 is example, and when UE is in fast state and the distribution density of small cell when lower, this UE should be connected to macrocell and remain on grand layer.Now, network can advise that UE only searches for the frequency relevant to macrocell when RLF occurs, for example search rate F1 only.When UE is in low speed or middling speed and the distribution density of small cell when higher, for fear of switching frequently and realizing business unloading, network can advise that UE only searches for the frequency relevant to small cell when RLF occurs, for example only search rate F2 and F3, and macrocell frequency F1 is not searched for.In addition, when the different hotspot's distributions for example, with different frequency (F2 and F3) that consist of a plurality of small cell are during in different position, in thering is the UE at the focus place of F3 frequency, can advise its only search rate F1 and F3 when RLF occurs.Similarly, in thering is the UE at the focus place of F2 frequency, can advise its only search rate F1 and F2 when RLF occurs.
Above-mentioned Shielding plan can be realized like this.First, network (for example source eNB of UE) can pass on one group of candidate target cells to UE with dedicated signaling, and this group candidate target cells can be to determine after having considered the motion state information of UE or the configuration scene information of macro base station or small base station.For these candidate target cells, it receives the contextual information of UE from source eNB via X2 interface.At UE, receive behind this group candidate target cells, when its experience RLF, UE can organize in candidate target base station and carry out necessary frequency search at this, to select final goal community, save thus the power consumption of UE and reduced time of Cell searching and selection, improved the efficiency of RRC connection re-establishment.
When the candidate target cells obtaining with UE self measurement when suggestion candidate target cells that network is passed on clashes, can to T311 timer value, do further adjustment according to the motion state of UE and the distribution situation of adjacent macro cell or small cell, so that UE has had sufficient time to the search to the candidate target cells of network reception and registration, thereby chooses suitable Target cell.
Fig. 8 be schematically show according to one embodiment of the present invention for the block diagram of the equipment 800 of the RRC connection re-establishment of heterogeneous network as shown in Figure 2.This equipment 800 comprises acquisition device 801 and determining device 802.In equipment 800, acquisition device 801 is configured for the configuration scene information (being the step S301 in manner of execution 300) that obtains at least one small base station, determining device 802 is configured for based on described configuration scene information determines at least one timer value, and wherein said at least one timer value is for the RRC connection re-establishment (being the step S302 of manner of execution 300) of described at least one UE.Can find out, by actuating equipment 800, can realize the method 300 shown in Fig. 3.Further, this equipment 800 can be implemented as base station (for example macro base station) or is included in base station.
Fig. 9 be schematically show according to the present invention another execution mode for the block diagram of the equipment 900 of the RRC connection re-establishment of heterogeneous network as shown in Figure 2.This equipment 900 comprises inking device 901 and determining device 902.In equipment 900, inking device 901 is configured at least one UE and configures one or more candidate's timer values (being the step S401 in manner of execution 400), determining device 902 is configured for according to the motion state information of described at least one UE and described one or more candidate's timer value determines final timer value, and wherein this final timer value is for the RRC connection re-establishment (being the step S402 of manner of execution 400) of described at least one UE.Can find out, by actuating equipment 900, can realize the method 400 shown in Fig. 4.Further, this equipment 900 can be implemented as UE or is included in UE.
To sum up, by reference to the accompanying drawings each execution mode of the present invention is described in detail.It will be appreciated by those skilled in the art that embodiments of the present invention can realize by hardware, software, firmware, module or its combination, also can embody the present invention in computer program set on the signal bearing medium for any suitable data treatment system.Sort signal bearing medium can be transmission medium or for the recordable media of machine sensible information, comprises magnetizing mediums, light medium or other suitable media.The example of recordable media comprises: the disk in hard disk drive or floppy disk, the CD for CD-ROM drive, tape, and thinkable other media of those skilled in the art.One skilled in the art would recognize that any proper communication equipment with suitable programmed device all can carry out the step of the inventive method as embodied in program product.
It should be noted that for the present invention is easier to understand, description has above been omitted to be known for a person skilled in the art and may to be essential some ins and outs more specifically for realization of the present invention.
Although disclose specific implementations of the present invention, it will be appreciated by those skilled in the art that and can make a change and can not depart from the spirit and scope of the present invention for specific execution mode.Therefore, the invention is not restricted to specific execution mode, and claims comprise any and all such application, modification and execution mode in the scope of the invention.
Claims (20)
1. for the vertical method of the radio resource control connection reestablishment of heterogeneous network, described heterogeneous network comprises at least one macro base station, at least one small base station and at least one subscriber equipment, and described method comprises:
Obtain the configuration scene information of described at least one small base station; And
Based on described configuration scene information, determine at least one timer value, wherein said at least one timer value is vertical for the radio resource control connection reestablishment of described at least one subscriber equipment.
2. method according to claim 1, wherein said configuration scene information comprises following at least one:
The positional information of described small base station;
The distribution density information of described small base station; And
The range information of described small base station and described macro base station.
3. method according to claim 1, further comprises:
Obtain the motion state information of described at least one subscriber equipment; And
Based on described configuration scene information and described motion state information, determine described at least one timer value.
4. method according to claim 3, wherein said motion state information comprises the motion velocity information of described at least one subscriber equipment and at least one in movement position information.
5. method according to claim 1, wherein, when determining a plurality of timer value, described method further comprises:
The configuration scene information of the motion state information based on described at least one subscriber equipment and adjacent one or more candidate's macro base stations thereof or small base station is determined the frequency band of shielding; And
The motion state information of the frequency band based on described shielding, at least one subscriber equipment and adjacent one or more candidate's macro base stations thereof or the configuration scene information of small base station, from a plurality of timer values, select final timer value, radio resource control connection reestablishment for described at least one subscriber equipment is vertical, wherein, in the vertical process of described radio resource control connection reestablishment, described at least one subscriber equipment will not searched for the frequency band of described shielding.
6. for the vertical method of the radio resource control connection reestablishment of heterogeneous network, described heterogeneous network comprises at least one macro base station, at least one small base station and at least one subscriber equipment, and described method comprises:
For the one or more candidate's timer values of described at least one user device configuration; And
According to the motion state information of described at least one subscriber equipment and described one or more candidate's timer value, determine final timer value, wherein said final timer value is vertical for the radio resource control connection reestablishment of described at least one subscriber equipment.
7. method according to claim 6, wherein when for candidate's timer value of described at least one user device configuration, described candidate's timer value determined according to the configuration scene information of described at least one small base station by described at least one macro base station, and described method further comprises:
According to described motion state information, regulate described candidate's timer value, to determine described final timer value.
8. method according to claim 6, wherein said motion state information comprises the motion velocity information of described at least one subscriber equipment and at least one in movement position information.
9. method according to claim 6, wherein, when for a plurality of candidate's timer value of described at least one user device configuration, described method further comprises:
Obtain the configuration scene information of described at least one small base station; And
According to described motion state information and described configuration scene information, from described a plurality of candidate's timer values, select described final timer value.
10. method according to claim 7, wherein said configuration scene information comprises following at least one:
The positional information of described small base station;
The distribution density information of described small base station; And
The range information of described small base station and described macro base station.
11. 1 kinds for the vertical equipment of the radio resource control connection reestablishment of heterogeneous network, and described heterogeneous network comprises at least one macro base station, at least one small base station and at least one subscriber equipment, and described equipment comprises:
Acquisition device, is configured for the configuration scene information that obtains described at least one small base station; And
Determining device, is configured for based on described configuration scene information and determines at least one timer value, and wherein said at least one timer value is vertical for the radio resource control connection reestablishment of described at least one subscriber equipment.
12. equipment according to claim 11, wherein said configuration scene information comprises following at least one:
The positional information of described small base station;
The distribution density information of described small base station; And
The range information of described small base station and described macro base station.
13. equipment according to claim 11, wherein said acquisition device is further configured for the motion state information of obtaining described at least one subscriber equipment, and described determining device is further configured for based on described configuration scene information and definite described at least one timer value of described motion state information.
14. equipment according to claim 13, wherein said motion state information comprises the motion velocity information of described at least one subscriber equipment and at least one in movement position information.
15. equipment according to claim 11, wherein, when determining a plurality of timer value, described determining device is further configured for:
The configuration scene information of the motion state information based on described at least one subscriber equipment and adjacent one or more candidate's macro base stations thereof or small base station is determined the frequency band of shielding; And
The motion state information of the frequency band based on described shielding, at least one subscriber equipment and adjacent one or more candidate's macro base stations thereof or the configuration scene information of small base station, from a plurality of timer values, select final timer value, radio resource control connection reestablishment for described at least one subscriber equipment is vertical, wherein, in the vertical process of described radio resource control connection reestablishment, described at least one subscriber equipment will not searched for the frequency band of described shielding.
16. 1 kinds for the vertical equipment of the radio resource control connection reestablishment of heterogeneous network, and described heterogeneous network comprises at least one macro base station, at least one small base station and at least one subscriber equipment, and described equipment comprises:
Inking device, is configured to the described one or more candidate's timer values of at least one user device configuration; And
Determining device, be configured for according to the motion state information of described at least one subscriber equipment and described one or more candidate's timer value and determine final timer value, wherein said final timer value is vertical for the radio resource control connection reestablishment of described at least one subscriber equipment.
17. equipment according to claim 16, wherein when for candidate's timer value of described at least one user device configuration, described candidate's timer value is determined according to the configuration scene information of described at least one small base station by described at least one macro base station, described determining device is further configured for according to described motion state information and regulates described candidate's timer value, to determine described final timer value.
18. equipment according to claim 16, wherein said motion state information comprises the motion velocity information of described at least one subscriber equipment and at least one in movement position information.
19. equipment according to claim 16, wherein, when for a plurality of candidate's timer value of described at least one user device configuration, described equipment further comprises acquisition device, is configured for the configuration scene information that obtains described at least one small base station; And
Described determining device is further configured for according to described motion state information and described configuration scene information and selects described final timer value from described a plurality of candidate's timer values.
20. equipment according to claim 17, wherein said configuration scene information comprises following at least one:
The positional information of described small base station;
The distribution density information of described small base station; And
The range information of described small base station and described macro base station.
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| CN201310032608.8A CN103974452B (en) | 2013-01-28 | 2013-01-28 | The method and apparatus stood for radio resource control connection reestablishment |
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| Publication number | Publication date |
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| CN103974452B (en) | 2017-12-01 |
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Address after: Pudong New Area, Pudong Jinqiao Ning Bridge Road, No. 388, No. Co-patentee after: Alcatel Optical Networks Israe Patentee after: Shanghai NOKIA Baer Limited by Share Ltd Address before: 201206 Shanghai, Pudong Jinqiao Ning Bridge Road, No. 388, No. Co-patentee before: Alcatel Optical Networks Israe Patentee before: Shanghai Alcatel-Lucent Co., Ltd. |