CN103391572A - LTE adjacent cell information learning method of UMTS network, user equipment and RNC - Google Patents
LTE adjacent cell information learning method of UMTS network, user equipment and RNC Download PDFInfo
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Abstract
The invention provides a LTE adjacent cell information learning method of the UMTS network. The LTE adjacent cell information learning method includes the steps of after user equipment fails to be redirected from the UMTS network to the LTE network, when the user equipment has access to the UMTS network again, reporting the information which is measured by the user equipment in the redirection process and related to the intensity and/or the quality of signals of LTE adjacent cells to a wireless network controller. The LTE adjacent cell information learning method further includes the steps of when an RNC transmits LTE redirection information to the user equipment through RRC information, enabling the RNC to carry indication information to indicate whether the user equipment stills stays in an LTE system to search LTE target cells or tries to have access to the UMTS network again to report or not to report the information related to the intensity and/or the quality of the signals of the LTE adjacent cells after the redirection fails. The invention further provides the user equipment and the RNC.
Description
Technical field
The present invention relates to 3GPP (3rd Generation Partnership, third generation partner program) 3G UMTS (Universal Mobile Telecommunications System in the mobile network of family series, universal mobile telecommunications system) network is learned method, subscriber equipment (UE) and the radio network controller (RNC) of LTE adjacent cell information in LTE (Long Term Evolution, Long Term Evolution) redirection process.
Background technology
Along with being on the increase of mobile operator contracted user number and subscriber traffic, the construction of its mobile network's infrastructure is disposed scale and is also constantly enlarged, and wireless coverage range and thickness are all strengthening.Take most of Europe mobile operator as example, they have successively disposed 3 kinds of 3GPP families based on different RAT (Radio Access Technology, wireless access technology) mobile network system is respectively: second generation 2G GSM (the evolved GERAN of being), third generation 3G UMTS (the evolved HSPA+ of being) and the 4th generation 4GLTE (evolved is LTE+).These mobile network systems are comprised of three parts substantially: (user is used for and the equipment of mobile network communication terminal, hand-holdable, vehicle-mounted or fixing), wireless access network (directly carries out the network element device of radio communication by air interface and terminal, comprise radio-frequency antenna, be connected with radio network controller base station) be connected the network element device that connects wireless access network and backbone transport networks or other cable networks with wireless core network).Specifically with 3G UMTS mobile network system wireless access UTRA (Universal Terrestrial Radio Access, the general land wireless access) part is example, as shown in Figure 1, it is comprised of different physical interface between UE, base station (NodeB) and RNC and 3 kinds of network elements.The 3GPP standard criterion communication protocol between terminal UE and UMTS wireless access network UTRAN, be used for being used on the signaling message content format of controlling and user's face the data packet format of transmitting user data and frame structure etc. such as air interface Uu is upper.RNC is the central controller of single UMTS wireless subsystem RNS, is responsible for switch, configuration and the centralized control of most of UMTS function.
LTE is the mainstream technology of 4G Long Term Evolution, by adopting OFDM (Orthogonal Frequency Division Multiplexing, OFDM) and MIMO (Multiple-Input Multiple-Out-put, multiple-input and multiple-output), and the technology such as flat architecture improved traffic rate and spectrum efficiency, reduced the time delay of network.When the mobile terminal UE in residing in the UMTS network service district enters within the LTE network signal coverage of operator or equivalent operator, operator for various reasons, usually pay the utmost attention to and will have 3G, the UE of 4G dual-mode capabilities moves in the LTE network service district as soon as possible, to provide corresponding business as the user more efficiently.
The UMTS network can be redirected by cross-system (Redirection) flow process, and with 3G, the UE of 4G dual-mode capabilities moves in LTE aims of systems Serving cell.Two kinds of basic application scenarioss are arranged here:
1:UE is initial launching RRC (Radio Resource Control in the UMTS persistent district, Radio Resource is controlled) connect and set up request message (RRC Connection Request), this message comprises pre-redirection information (Pre-Redirection info), and expression UE supports at least one the LTE frequency range in the UMTS system broadcast message; And after RNC receives this message request, by carrying redirection information (Redirection info) in RRC connection refused message (RRC CONNECTION REJECT), order UE does residential quarter and selects in the LTE target frequency of indication, then again attempt setting up the RRC space interface signaling and connect.
2:UE has set up RRC and has connected and some radio bearers (Radio Bearer) in the UMTS Serving cell, RNC is by carrying Redirection info in RRC connection release message (RRC CONNECTION RELEASE), order UE discharges existing RRC and connects and radio bearer, then do residential quarter and select in the LTE target frequency of indication, re-establish the RRC space interface signaling and connect and the radio bearer of being correlated with.
Set up the deployment initial stage at the LTE network, hot localised points covers often, because the random mobility of UE causes the real-time change of network wireless signal strength signal intensity or quality or some problems of UE self, in the time of can causing UE to be redirected to the LTE network from UMTS, occur that LTE is redirected unsuccessfully (Redirection Failure).After the failure of LTE network redirection, usually can select flow process by the UMTS Serving cell as UE, again attempt resident and access original UMTS network.The RRC that may not necessarily preserve this UE due to RNC connects historical information, and whether this UE that therefore can not be severe in judgment has just experienced LTE is redirected unsuccessfully, or the normal RRC access of UE.If after this RNC blindly is redirected to the LTE network with UE again, probably continue to cause UE to be redirected unsuccessfully to LTE, this continuous LTE is redirected unsuccessfully, can cause UE at normal access network or obtain the radio bearer service of network of long period, affect greatly user's communication experiences impression.Therefore, when UE experience from the UMTS network redirection after the LTE network failure, RNC need to have a kind of mechanism can reduce UE again to be redirected failed probability to the LTE network.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method, UE and RNC of the LTE of learning adjacent cell information, reduces UE and again is redirected failed probability to the LTE network.
In order to address the above problem, the invention provides a kind of UMTS network and learn the method for LTE adjacent cell information, comprising:
Subscriber equipment from universal mobile telecommunications system UMTS network redirection after Long Term Evolution LTE network failure, while by radio resource control RRC message, again accessing the UMTS network, report signal strength signal intensity and/or the relevant information of signal quality of described subscriber equipment measures in described redirection process LTE neighbor cell to radio network controller.
Further, said method also can have following characteristics, signal strength signal intensity and/or the relevant information of signal quality that described subscriber equipment carries described LTE neighbor cell by the Random Access Channel measurement result Measured results on RACH cell in described RRC message or newly-increased cell.
Further, said method also can have following characteristics, and described LTE neighbor cell comprises described subscriber equipment measures in described redirection process all or part of LTE neighbor cell.
Further, said method also can have following characteristics, and described method also comprises:
In described redirection process,, when the LTE neighbor cell meets S criterion assessment formula S rxlev 〉=X or Squal 〉=Y, record signal strength signal intensity and/or the relevant information of signal quality of this LTE neighbor cell, above-mentioned X, Y are the predefine constant; , if a LTE target frequency has detected a plurality of LTE neighbor cells that meet above-mentioned condition, only record signal strength signal intensity and/or the relevant information of signal quality of the best LTE neighbor cell of signal strength signal intensity on this LTE target frequency or signal quality;
The information that the signal strength signal intensity of the described described subscriber equipment that reports measures in described redirection process LTE neighbor cell and/or signal quality are relevant comprises:
Report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that records.
Further, said method also can have following characteristics, and the described signal strength signal intensity of the LTE neighbor cell that records and/or the relevant information of signal quality of reporting comprises:
After the LTE neighbor cell that records is sorted according to signal strength signal intensity and/or signal quality, the frequency of each LTE neighbor cell and/or identification list are reported.
Further, said method also can have following characteristics, and described method also comprises,
Described subscriber equipment also judges before again accessing the UMTS network by radio resource control RRC message, whether receive the indication information that the network side requirement reports signal strength signal intensity and/or the information that signal quality is correlated with of LTE neighbor cell, if so, just to described radio network controller, report signal strength signal intensity and/or the relevant information of signal quality of described subscriber equipment measures in described redirection process LTE neighbor cell.
The present invention also provides a kind of UMTS network to learn the method for LTE adjacent cell information, comprising:
when radio network controller sends the LTE redirection information by RRC message to subscriber equipment, carry indication information, indicate described subscriber equipment after being redirected unsuccessfully, whether still rest on search LTE Target cell in the LTE system, perhaps, again attempt access UMTS network, do not report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that measures in described redirection process, perhaps, again attempt access UMTS network, and report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that measures in described redirection process.
Further, said method also can have following characteristics, carry environmental statement cell in adjacent area in described RRC message, and when value is the first designated value, indicate described subscriber equipment after being redirected unsuccessfully, again attempt access UMTS network, and report signal strength signal intensity and/or the relevant information of signal quality of described LTE neighbor cell.
Further, said method also can have following characteristics, carries environmental statement cell in adjacent area in described RRC message, and value is the second designated value; Perhaps, while not carrying environmental statement cell in adjacent area in described RRC message, indicate described subscriber equipment after being redirected unsuccessfully, still rest on search LTE Target cell in the LTE system, perhaps, again attempt access UMTS network, do not report signal strength signal intensity and/or the relevant information of signal quality of described LTE neighbor cell.
The present invention also provides a kind of subscriber equipment, comprise: access unit, be used for described subscriber equipment from the UMTS network redirection after Long Term Evolution LTE network failure, while by radio resource control RRC message, again accessing the UMTS network, report signal strength signal intensity and/or the relevant information of signal quality of described subscriber equipment measures in described redirection process LTE neighbor cell to radio network controller.
Further, above-mentioned subscriber equipment also can have following characteristics, signal strength signal intensity and/or the relevant information of signal quality that described access unit carries described LTE neighbor cell by the Random Access Channel measurement result Measured results on RACH cell in described RRC message or newly-increased cell.
Further, above-mentioned subscriber equipment also can have following characteristics, and described LTE neighbor cell comprises described subscriber equipment measures in described redirection process all or part of LTE neighbor cell.
Further, above-mentioned subscriber equipment also can have following characteristics, described access unit also is used for, in described redirection process, when the LTE neighbor cell meets S criterion assessment formula S rxlev 〉=X or Squal 〉=Y, record signal strength signal intensity and/or the relevant information of signal quality of this LTE neighbor cell, above-mentioned X, Y are the predefine constant; , if a LTE target frequency has detected a plurality of LTE neighbor cells that meet above-mentioned condition, only record signal strength signal intensity and/or the relevant information of signal quality of the best LTE neighbor cell of signal strength signal intensity on this LTE target frequency or signal quality; Report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that records.
Further, above-mentioned subscriber equipment also can have following characteristics, and described access unit reports the signal strength signal intensity of the LTE neighbor cell that records and/or the relevant information of signal quality to comprise:
After the LTE neighbor cell that records is sorted according to signal strength signal intensity and/or signal quality, the frequency of each LTE neighbor cell and/or identification list are reported.
Further, above-mentioned subscriber equipment also can have following characteristics, described access unit also is used for, again also judge before accessing the UMTS network by radio resource control RRC message, whether receive the indication information that the network side requirement reports signal strength signal intensity and/or the information that signal quality is correlated with of LTE neighbor cell, if so, just to described radio network controller, report signal strength signal intensity and/or the relevant information of signal quality of described subscriber equipment measures in described redirection process LTE neighbor cell.
The present invention also provides a kind of radio network controller, comprising: be redirected indicating member, be used for,
While by RRC message, to subscriber equipment, sending the LTE redirection information, carry indication information, indicate described subscriber equipment after being redirected unsuccessfully, whether still rest on search LTE Target cell in the LTE system, perhaps, again attempt access UMTS network, do not report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that measures in described redirection process, perhaps, again attempt access UMTS network, and report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that measures in described redirection process.
Further, above-mentioned radio network controller also can have following characteristics, carry adjacent area environmental statement cell in described RRC message, and when value is the first designated value, indicate described subscriber equipment after being redirected unsuccessfully, again attempt access UMTS network, and report signal strength signal intensity and/or the relevant information of signal quality of described LTE neighbor cell.
Further, above-mentioned radio network controller also can have following characteristics, work as to state in RRC message and carry adjacent area environmental statement cell, and value is the second designated value; Perhaps, while not carrying environmental statement cell in adjacent area in described RRC message, indicate described subscriber equipment after being redirected unsuccessfully, still rest on search LTE Target cell in the LTE system, perhaps, again attempt access UMTS network, do not report signal strength signal intensity and/or the relevant information of signal quality of described LTE neighbor cell.
In the present invention, UE can report the measurement result in redirection process, and RNC can learn that the signal of the current LTE neighbor cell of UE covers situation, and lifting RNC is follow-up is redirected successful probability to the LTE system again to UE.
Description of drawings
Fig. 1 is UMTS wireless access planar network architecture;
Fig. 2 is the flow chart of the embodiment of the present invention 1;
Fig. 3 is the flow chart of the embodiment of the present invention 2;
Fig. 4 is the flow chart of the embodiment of the present invention 3.
Embodiment
, for making the purpose, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.Need to prove, in the situation that do not conflict, the embodiment in the application and the feature in embodiment be combination in any mutually.
According to current 3GPP air interface standard standard, no matter UE accesses the UMTS Serving cell again by RRC Connection Request message or cell update (Cell Update) message or other RRC upstream messages, comprises alternatively Random Access Channel measurement result (Measured results on RACH) cell.This cell was merely able to transmit signal strength signal intensity or the quality of frequently same in some UMTS systems and alien frequencies neighbor cell before 3GPP version 11.On principle, be redirected to by UMTS as UE in LTE target frequency and do in the process of selecting residential quarter, UE must have a go at LTE residential quarter RSRP (Reference Signal Receiving Power, Reference Signal Received Power) and RSRQ (Reference Signal Receiving Quality, Reference Signal Received Quality) measurement, according to 3GPP 36.304 standards, only have when UE meets the so-called LTE residential quarter selection of following formula S criterion, UE could successfully reside in the LTE Target cell.
Srxlev＞0 AND
Squal＞0
where：
Srxlev＝Q
rxlevrneas-(Q
rxlevrnin+Q
rxlevrninoffset)-Pcompensation
Squal＝Q
qualmeas-(Q
qualmin+Q
qualminoffset)
Be redirected under failed background at LTE, although UE can't find the LTE Target cell that meets above-mentioned condition in any LTE target frequency, or some RSRP or the more weak LTE Target cell of RSRQ may be detected.
Based on this, the present invention will utilize these to be accompanied by that UE redirection process small area is selected and some LTE residential quarters of detecting, promote that RNC is follow-up is redirected successful probability to the LTE system again to UE.
The embodiment of the present invention provides a kind of UMTS network to learn the method for LTE adjacent cell information, comprising:
when radio network controller sends the LTE redirection information by RRC message to subscriber equipment, carry indication information, indicate described subscriber equipment after being redirected unsuccessfully, whether still rest on search LTE Target cell in the LTE system, perhaps, again attempt access UMTS network, do not report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that measures in described redirection process, perhaps, again attempt access UMTS network, and report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that measures in described redirection process.
Wherein, carry environmental statement cell in adjacent area in described RRC message, and value indicates described subscriber equipment after being redirected unsuccessfully while being the first designated value, again attempt access UMTS network, and report signal strength signal intensity and/or the relevant information of signal quality of described LTE neighbor cell.
Wherein, carry adjacent area environmental statement cell (Neighbour Environment Report) in described RRC message, and value is the second designated value; Perhaps, while not carrying environmental statement cell in adjacent area in described RRC message, indicate described subscriber equipment after being redirected unsuccessfully, still rest on search LTE Target cell in the LTE system, perhaps, again attempt access UMTS network, do not report signal strength signal intensity and/or the relevant information of signal quality of described LTE neighbor cell.
The first designated value can be true (TRUE), and the second designated value can be only example for false (FALSE) herein, can get as required other values, and the present invention is not construed as limiting this.The title of adjacent area environmental statement cell is only example, can use as required other titles, within all being included in the scope of the invention.
The embodiment of the present invention also provides a kind of UMTS network to learn the method for LTE adjacent cell information, comprising:
Subscriber equipment from universal mobile telecommunications system UMTS network redirection after Long Term Evolution LTE network failure, while by radio resource control RRC message, again accessing the UMTS network, report signal strength signal intensity and/or the relevant information of signal quality of described subscriber equipment measures in described redirection process LTE neighbor cell to radio network controller.
Wherein, described subscriber equipment signal strength signal intensity and/or the relevant information of signal quality of carrying described LTE neighbor cell by the Random Access Channel measurement result Measured results on RACH cell in described RRC message or newly-increased cell.
Wherein, described LTE neighbor cell comprises described subscriber equipment measures in described redirection process all or part of LTE neighbor cell.
Wherein, described method also comprises, in described redirection process, when the LTE neighbor cell meets S criterion assessment formula S rxlev 〉=X or Squal 〉=Y, record signal strength signal intensity and/or the relevant information of signal quality of this LTE neighbor cell, above-mentioned X, Y are the predefine constant; , if a LTE target frequency has detected a plurality of LTE neighbor cells that meet above-mentioned condition, only record signal strength signal intensity and/or the relevant information of signal quality of the best LTE neighbor cell of signal strength signal intensity on this LTE target frequency or signal quality;
Srxlev is the value relevant to signal strength signal intensity, and Squal is the value relevant to signal quality, and circular, referring to existing 3GPP standard, repeats no more herein.Above-mentioned recording method is only an example, can set as required other criterions, and the LTE neighbor cell relevant information disease that record meets criterion reports, and the present invention is not construed as limiting this.
The described signal strength signal intensity of described subscriber equipment measures in described redirection process LTE neighbor cell and/or the relevant information of signal quality of reporting comprises:
Report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that records.
Wherein, the described signal strength signal intensity of the LTE neighbor cell that records and/or the relevant information of signal quality of reporting comprises:
After the LTE neighbor cell that records is sorted according to signal strength signal intensity and/or signal quality, the frequency of each LTE neighbor cell and/or identification list are reported.
Wherein, described method also comprises,
Described subscriber equipment also judges before again accessing the UMTS network by radio resource control RRC message, whether receive the indication information that the network side requirement reports signal strength signal intensity and/or the information that signal quality is correlated with of LTE neighbor cell, if so, just to described radio network controller, report signal strength signal intensity and/or the relevant information of signal quality of described subscriber equipment measures in described redirection process LTE neighbor cell.
Technical scheme of the present invention is achieved in that
RNC can be respectively by when carrying redirection information Redirection info/Inter-RAT info/E-UTRA Target Info in RRC connection refused message or RRC connection release message, increase the cell indication: if tell UE experience LTE to be redirected the UMTS system of unsuccessfully getting back to, whether need to expand in Measured results on RACH cell add detection record in some UE redirection process to the signal message of LTE neighbor cell (perhaps be introduced separately into the new cell of similar Measured results onRACH, be used for carrying separately above-mentioned information).This cell can have following two kinds of definition:
Definition 1: essential existence, LTE Neighbour Environment Report=TRUE/FALSE.
If value is TRUE, if expression UE is chosen successfully less than residential quarter in the LTE target frequency in E-UTRA Target Info indication, must return to as early as possible the UMTS system, and in the time of with any RRC upstream message access, must carry signal strength signal intensity or the relevant information of quality of LTE neighbor cell in Measured results on RACH cell;
If value is FALSE, expression UE needn't force to return the UMTS system, perhaps need to not carry signal strength signal intensity or the quality information of LTE neighbor cell in Measured results on RACH cell.
Definition 2: optional existence, comprise LTE Neighbour Environment Report cell in redirect message, and when value is TRUE, if expression UE is chosen successfully less than residential quarter in the LTE target frequency in E-UTRA Target Info indication, must return to as early as possible the UMTS system, and in the time of with any RRC upstream message access, must carry signal strength signal intensity or the quality information of LTE neighbor cell in Measured results on RACH cell; While not comprising LTE Neighbour Environment Report cell in redirect message, represent that UE needn't force to return the UMTS system, perhaps need to not carry signal strength signal intensity or the quality information of LTE neighbor cell in Measured results on RACH cell.
When as UE, carrying out the residential quarter selection in the LTE target frequency of E-UTRA Target Info indication, must carry out LTE cell measurement and the assessment of S criterion.If UE receives the indication of LTE Neighbour Environment Report=TRUE from RNC, and when occurring Srxlev 〉=X or Squal 〉=Y in S criterion assessment formula, UE need to record the measure strength of this LTE residential quarter or quality, Physical Cell Identifier (PCI) and corresponding LTE frequency.Above-mentioned X, Y are network predefine constant.Can be also the pre-configured parameter of network, by system broadcast message, send to subscriber equipment.If some LTE frequencies have detected a plurality of LTE residential quarters that meet above-mentioned condition, UE only records signal strength signal intensity or top-quality LTE residential quarter PCI on that LTE frequency.Complete the detection of the LTE target frequency that all E-UTRA Target Info are indicated as UE, then according on each LTE target frequency, preferably signal strength signal intensity or the quality of LTE residential quarter sort the LTE frequency more from big to small.
According to the 3GPP protocol specification, E-UTRA Target Info can indicate the value of maximum 8 LTE target frequency EARFCN (the absolute frequency point number of LTE), so signal strength signal intensity or the quality information of the LTE neighbor cell that carries in Measured results on RACH cell or new cell can have following characteristics:
1: in theory, be that a maximum number of lines is 8 list, network also can be arranged the maximum number of lines less than 8, such as at most only needing 3 row.
2: in table, each line item certain LTE residential quarter PCI and/or LTE frequency point information.
3: the first row correspondence the strongest LTE frequency and the residential quarter that UE measures in being redirected, and the second row correspondence the last the second, and the rest may be inferred.
The signal strength signal intensity of the above-mentioned LTE of carrying neighbor cell or the mode of quality information are example, can arrange to use other modes to carry, and the present invention is not construed as limiting this.
Alternatively, also can report signal strength signal intensity or the signal quality value of LTE neighbor cell.
When no matter UE accesses the UMTS Serving cell again by RRC Connection Request message or cell update Cell Update message or other RRC upstream messages, comprise alternatively signal strength signal intensity or the relevant information of quality of above-mentioned LTE neighbor cell.After RNC receives the RRC upstream message of UE, just can resolve and learn out that the signal of the current LTE neighbor cell of UE covers situation.
Further, RNC also can not do the indication of any LTE Neighbour Environment Report to UE in the RRC redirect message.As long as certain version UE can do the collection about LTE neighbor cell signal intensity or quality information and sequence that content of the present invention is set forth in redirection process, when returning to afterwards UMTS system RRC access, signal quality and/or the intensity relevant information of the LTE neighbor cell of namely being correlated with alternatively report.
Embodiment 1:
Introduce essential indication information element LTE Neighbour Environment Report=TRUE/FALSE in RRC connection refused message and RRC connection release message, and expanded Measured results on RACH cell, in order to signal strength signal intensity or the relevant report list of quality information of carrying the LTE neighbor cell, and agreement UE maximum can only report the strongest residential quarter PCI on 3 LTE frequencies and each frequency.Implementation step is seen in Fig. 2 and is described, and comprising:
Step 101:UE is in Idle state, initiates RRC Connection Request, comprises cell Pre-Redirection info, and Support of E-UTRA FDD=TRUE; Support of E-UTRA TDD=TRUE.
Step 102:RNC carries out LTE by RRC Connection Reject to be redirected, and wherein comprises LTE frequency [F1, F2, F3, F4, F5] in E-UTRA Target Info, indicates simultaneously LTE Neighbour Environment Report=TRUE;
Step 103:UE successfully is not redirected at LTE target frequency, the LTE residential quarter that detects is collected and is sorted, and selects to return the UMTS system.UE initiates RRC Connection Request, comprises cell Measured results on RACH, and reports the list of [F2 (PCI=100), F3 (PCI=200), F1 (PCI=50)].
Step 104:RNC learns around the residing position of UE, the LTE neighbor cell signal intensity of PCI=100 or best in quality on LTE F2 frequency, be secondly PCI=200 on LTE F3 frequency, is PCI=50 on LTE F1 frequency again, at F4, F5 is upper does not have relevant LTE to cover.
Embodiment 2:
Introduce optional indication information element LTE Neighbour Environment Report=TRUE in RRC connection refused message RRC CONNECTION REJECT and RRC connection release message RRC CONNECTION RELEASE, and introduced new LTE Measured results on RACH cell, in order to signal strength signal intensity or the relevant report list of quality information of carrying the LTE neighbor cell, and agreement UE maximum can only report 3 LTE frequencies.Implementation step is seen in Fig. 3 and is described, and comprising:
Step 201:UE is in RRC Cell_FACH state in certain UMTS Serving cell, carrying out the small data business of networking.
Step 202: due to the demand of business experience QoS, RNC carries out LTE by RRC Connection Release to be redirected, and wherein E-UTRA Target Info comprises LTE frequency [F1, F2, F3, F4, F5], comprise simultaneously and indicate LTE Neighbour Environment Report=TRUE;
Step 203:UE successfully is not redirected at LTE target frequency, and the LTE residential quarter that detects is collected and sorted, and the UMTS system is selected to have returned in residential quarter.UE initiates RRC Connection Request, comprises new cell LTE Measured results on RACH, and reports the list of [F2 (PCI=100), F4 (PCI=300)];
Step 204:RNC learns around the residing position of UE, and the LTE neighbor cell signal intensity of PCI=100 or best in quality on LTE F2 frequency, be secondly PCI=300 on LTE F4 frequency, at F1, and F3, F5 is upper does not have relevant LTE to cover.
Embodiment 3:
Do not want special indication information element in RRC CONNECTION REJECT and RRC CONNECTION RELEASE, but for the redaction UE that content ability of the present invention is arranged, if residential quarter does not have chosen successfully in the LTE target frequency of E-UTRA Target Info indication, must return to as early as possible the UMTS system, and in the time of with any RRC upstream message access, must carry signal strength signal intensity RSRP or the relevant list information of quality RSRQ of LTE neighbor cell in Measured results on RACH cell, and agreement UE can only report at most 4 LTE frequencies.Implementation step is seen in Fig. 4 and is described, and comprising:
Step 301:UE is in Idle state, initiates RRC Connection Request, comprises cell Pre-Redirection info, and Support of E-UTRA FDD=TRUE; Support of E-UTRA TDD=TRUE.
Step 302:RNC carries out LTE by RRC Connection Reject to be redirected, and wherein E-UTRA Target Info comprises LTE frequency [F1, F2, F3, F4];
Step 303:UE successfully is not redirected at LTE target frequency, the LTE residential quarter that detects is collected and is sorted, and the UMTS system is selected to have returned in residential quarter.UE initiates RRC Connection Request, comprises cell Measured results on RACH, and reports the list of [F3 (PCI=200), F1 (PCI=50)];
Step 304:RNC learns around the residing position of UE, and the LTE neighbor cell signal intensity of PCI=200 or best in quality on LTE F3 frequency, be secondly PCI=50 on LTE F1 frequency, and at F2, F4 is upper does not have relevant LTE to cover.
The present invention also provides a kind of subscriber equipment, comprise, access unit, be used for described subscriber equipment from the UMTS network redirection after Long Term Evolution LTE network failure, while by radio resource control RRC message, again accessing the UMTS network, report signal strength signal intensity and/or the relevant information of signal quality of described subscriber equipment measures in described redirection process LTE neighbor cell to radio network controller.
Wherein, described access unit signal strength signal intensity and/or the relevant information of signal quality of carrying described LTE neighbor cell by the Random Access Channel measurement result Measured results on RACH cell in described RRC message or newly-increased cell.
Wherein, described LTE neighbor cell comprises described subscriber equipment measures in described redirection process all or part of LTE neighbor cell.
Wherein, described access unit also is used for, in described redirection process, when the LTE neighbor cell meets S criterion assessment formula S rxlev 〉=X or Squal 〉=Y, record signal strength signal intensity and/or the relevant information of signal quality of this LTE neighbor cell, above-mentioned X, Y are the predefine constant; , if a LTE target frequency has detected a plurality of LTE neighbor cells that meet above-mentioned condition, only record signal strength signal intensity and/or the relevant information of signal quality of the best LTE neighbor cell of signal strength signal intensity on this LTE target frequency or signal quality; Report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that records.
Wherein, described access unit reports the signal strength signal intensity of the LTE neighbor cell that records and/or the relevant information of signal quality to comprise:
After the LTE neighbor cell that records is sorted according to signal strength signal intensity and/or signal quality, the frequency of each LTE neighbor cell and/or identification list are reported.
Wherein, described access unit also is used for, again also judge before accessing the UMTS network by radio resource control RRC message, whether receive the indication information that the network side requirement reports signal strength signal intensity and/or the information that signal quality is correlated with of LTE neighbor cell, if so, just to described radio network controller, report signal strength signal intensity and/or the relevant information of signal quality of described subscriber equipment measures in described redirection process LTE neighbor cell.
The present invention also provides a kind of radio network controller, comprising: be redirected indicating member, be used for,
While by RRC message, to subscriber equipment, sending the LTE redirection information, carry indication information, indicate described subscriber equipment after being redirected unsuccessfully, whether still rest on search LTE Target cell in the LTE system, perhaps, again attempt access UMTS network, do not report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that measures in described redirection process, perhaps, again attempt access UMTS network, and report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that measures in described redirection process.
Wherein, carry adjacent area environmental statement cell in described RRC message, and value indicates described subscriber equipment after being redirected unsuccessfully while being the first designated value, again attempt access UMTS network, and report signal strength signal intensity and/or the relevant information of signal quality of described LTE neighbor cell.
Wherein, work as to state in RRC message and carry adjacent area environmental statement cell, and value is the second designated value; Perhaps, while not carrying environmental statement cell in adjacent area in described RRC message, indicate described subscriber equipment after being redirected unsuccessfully, still rest on search LTE Target cell in the LTE system, perhaps, again attempt access UMTS network, do not report signal strength signal intensity and/or the relevant information of signal quality of described LTE neighbor cell.
The above, be only preferred embodiment of the present invention, not is used for limiting protection scope of the present invention.
One of ordinary skill in the art will appreciate that all or part of step in said method can come the instruction related hardware to complete by program, described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (18)
1. a UMTS network is learned the method for LTE adjacent cell information, it is characterized in that, comprising:
Subscriber equipment from universal mobile telecommunications system UMTS network redirection after Long Term Evolution LTE network failure, while by radio resource control RRC message, again accessing the UMTS network, report signal strength signal intensity and/or the relevant information of signal quality of described subscriber equipment measures in described redirection process LTE neighbor cell to radio network controller.
2. the method for claim 1, it is characterized in that signal strength signal intensity and/or the relevant information of signal quality that described subscriber equipment carries described LTE neighbor cell by the Random Access Channel measurement result Measured results on RACH cell in described RRC message or newly-increased cell.
3. the method for claim 1, is characterized in that, described LTE neighbor cell comprises described subscriber equipment measures in described redirection process all or part of LTE neighbor cell.
4. the method for claim 1, is characterized in that, described method also comprises:
In described redirection process,, when the LTE neighbor cell meets S criterion assessment formula S rxlev 〉=X or Squal 〉=Y, record signal strength signal intensity and/or the relevant information of signal quality of this LTE neighbor cell, above-mentioned X, Y are the predefine constant; , if a LTE target frequency has detected a plurality of LTE neighbor cells that meet above-mentioned condition, only record signal strength signal intensity and/or the relevant information of signal quality of the best LTE neighbor cell of signal strength signal intensity on this LTE target frequency or signal quality;
The information that the signal strength signal intensity of the described described subscriber equipment that reports measures in described redirection process LTE neighbor cell and/or signal quality are relevant comprises:
Report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that records.
5. method as claimed in claim 4, is characterized in that, the described signal strength signal intensity of the LTE neighbor cell that records and/or the relevant information of signal quality of reporting comprises:
After the LTE neighbor cell that records is sorted according to signal strength signal intensity and/or signal quality, the frequency of each LTE neighbor cell and/or identification list are reported.
6. described method as arbitrary in claim 1 to 4, is characterized in that, described method also comprises,
Described subscriber equipment also judges before again accessing the UMTS network by radio resource control RRC message, whether receive the indication information that the network side requirement reports signal strength signal intensity and/or the information that signal quality is correlated with of LTE neighbor cell, if so, just to described radio network controller, report signal strength signal intensity and/or the relevant information of signal quality of described subscriber equipment measures in described redirection process LTE neighbor cell.
7. a UMTS network is learned the method for LTE adjacent cell information, it is characterized in that, comprising:
when radio network controller sends the LTE redirection information by RRC message to subscriber equipment, carry indication information, indicate described subscriber equipment after being redirected unsuccessfully, whether still rest on search LTE Target cell in the LTE system, perhaps, again attempt access UMTS network, do not report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that measures in described redirection process, perhaps, again attempt access UMTS network, and report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that measures in described redirection process.
8. method as claimed in claim 7, it is characterized in that, carry environmental statement cell in adjacent area in described RRC message, and when value is the first designated value, indicate described subscriber equipment after being redirected unsuccessfully, again attempt access UMTS network, and report signal strength signal intensity and/or the relevant information of signal quality of described LTE neighbor cell.
9. method as claimed in claim 7 or 8, is characterized in that, carry environmental statement cell in adjacent area in described RRC message, and value is the second designated value; Perhaps, while not carrying environmental statement cell in adjacent area in described RRC message, indicate described subscriber equipment after being redirected unsuccessfully, still rest on search LTE Target cell in the LTE system, perhaps, again attempt access UMTS network, do not report signal strength signal intensity and/or the relevant information of signal quality of described LTE neighbor cell.
10. subscriber equipment, it is characterized in that, comprise: access unit, be used for described subscriber equipment from the UMTS network redirection after Long Term Evolution LTE network failure, while by radio resource control RRC message, again accessing the UMTS network, report signal strength signal intensity and/or the relevant information of signal quality of described subscriber equipment measures in described redirection process LTE neighbor cell to radio network controller.
11. subscriber equipment as claimed in claim 10, it is characterized in that signal strength signal intensity and/or the relevant information of signal quality that described access unit carries described LTE neighbor cell by the Random Access Channel measurement result Measured results on RACH cell in described RRC message or newly-increased cell.
12. subscriber equipment as claimed in claim 10, is characterized in that, described LTE neighbor cell comprises described subscriber equipment measures in described redirection process all or part of LTE neighbor cell.
13. subscriber equipment as claimed in claim 10, it is characterized in that, described access unit also is used for, in described redirection process, when the LTE neighbor cell meets S criterion assessment formula S rxlev 〉=X or Squal 〉=Y, record signal strength signal intensity and/or the relevant information of signal quality of this LTE neighbor cell, above-mentioned X, Y are the predefine constant; , if a LTE target frequency has detected a plurality of LTE neighbor cells that meet above-mentioned condition, only record signal strength signal intensity and/or the relevant information of signal quality of the best LTE neighbor cell of signal strength signal intensity on this LTE target frequency or signal quality; Report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that records.
14. subscriber equipment as claimed in claim 13, is characterized in that, described access unit reports the signal strength signal intensity of the LTE neighbor cell that records and/or the relevant information of signal quality to comprise:
After the LTE neighbor cell that records is sorted according to signal strength signal intensity and/or signal quality, the frequency of each LTE neighbor cell and/or identification list are reported.
15. described subscriber equipment as arbitrary in claim 10 to 13, it is characterized in that, described access unit also is used for, again also judge before accessing the UMTS network by radio resource control RRC message, whether receive the indication information that the network side requirement reports signal strength signal intensity and/or the information that signal quality is correlated with of LTE neighbor cell, if so, just to described radio network controller, report signal strength signal intensity and/or the relevant information of signal quality of described subscriber equipment measures in described redirection process LTE neighbor cell.
16. a radio network controller, is characterized in that, comprising: be redirected indicating member, be used for,
While by RRC message, to subscriber equipment, sending the LTE redirection information, carry indication information, indicate described subscriber equipment after being redirected unsuccessfully, whether still rest on search LTE Target cell in the LTE system, perhaps, again attempt access UMTS network, do not report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that measures in described redirection process, perhaps, again attempt access UMTS network, and report signal strength signal intensity and/or the relevant information of signal quality of the LTE neighbor cell that measures in described redirection process.
17. radio network controller as claimed in claim 16, it is characterized in that, carry adjacent area environmental statement cell in described RRC message, and when value is the first designated value, indicate described subscriber equipment after being redirected unsuccessfully, again attempt access UMTS network, and report signal strength signal intensity and/or the relevant information of signal quality of described LTE neighbor cell.
18. radio network controller as described in claim 16 or 17, is characterized in that, work as to state in RRC message and carry adjacent area environmental statement cell, and value is the second designated value; Perhaps, while not carrying environmental statement cell in adjacent area in described RRC message, indicate described subscriber equipment after being redirected unsuccessfully, still rest on search LTE Target cell in the LTE system, perhaps, again attempt access UMTS network, do not report signal strength signal intensity and/or the relevant information of signal quality of described LTE neighbor cell.
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