CN105025536A - Long term evolution (LTE) to evolution high-rate packet data (eHRPD) switching method, LTE to eHRPD system, terminal and evolved node B (eNB) - Google Patents
Long term evolution (LTE) to evolution high-rate packet data (eHRPD) switching method, LTE to eHRPD system, terminal and evolved node B (eNB) Download PDFInfo
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- CN105025536A CN105025536A CN201410176038.4A CN201410176038A CN105025536A CN 105025536 A CN105025536 A CN 105025536A CN 201410176038 A CN201410176038 A CN 201410176038A CN 105025536 A CN105025536 A CN 105025536A
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Abstract
The present invention discloses a long term evolution (LTE) to evolution high-rate packet data (eHRPD) switching method, an LTE to eHRPD system, a terminal and an evolved node B (eNB), and relates to the technical scheme of mobile communication. In the method, the eNB instructs a terminal to be redirected to an eHRPD carrier fan of which the signal quality meets requirements and the load is the minimum, and the terminal leaves the LTE after receiving redirection information, and captures and is accessed to the carrier fan appointed by the eNB, thereby completing LTE-to- eHRPD non-optimization activation switching. In the method, system, terminal and eNB scheme, the terminal does not need to carry out Hash, thereby reducing switching delay.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to a kind of LTE (Long TermEvolution, long-term evolving network) to eHRPD (evolution High-Rate Packet Data, the high-speed grouped data network of evolution) changing method, system, terminal and eNB (evolved NodeB, evolved base station).
Background technology
Following CDMA (Code Division Multiple Access, code division multiple access) network will to LTE network evolution, and eHRPD network and LTE network are by long-term co-existence, and between eHRPD and LTE two nets, interoperability is necessary.LTE to eHRPD activates switching and is divided into optimization activation switching and unoptimizable activation to switch, current main flow plant equipment wouldn't be supported that LTE to eHRPD optimizes and activate switching, only support that the activation of LTE to eHRPD unoptimizable switches, it is adopt to be redirected to carry out activation switching that LTE to eHRPD unoptimizable activates switching.
During LTE to eHRPD non-optimized switchover, when eHRPD has multiple frequency, eNB is generally switched to a frequency of eHRPD according to polling mechanism or is fixedly switched to the basic frequency that eHRPD extensively covers, terminal needs Hash (Hash) with balanced eHRPD many carrier loads before access eHRPD, when the frequency that frequency and the eNodeB of Hash specify is inconsistent, terminal upgrades system message by leaving frequency that eNodeB specifies to the frequency of Hash, then access is initiated, and upgrade primary system message and need the time, such as about 1 second, thus cause LTE to eHRPD non-optimized switchover time delay larger.
Summary of the invention
The present inventor finds to have problems in above-mentioned prior art, and therefore proposes a kind of new technical scheme at least one problem in described problem.
An object of the present invention is to provide a kind of technical scheme of the switching for LTE to eHRPD.
According to a first aspect of the invention, provide the changing method of a kind of LTE to eHRPD, comprising:
Terminal receives the redirect message from eNB, and redirect message comprises frequency and PN code;
Terminal leaves LTE, and eHRPD is by frequency and the well-determined redirected contained fan of PN code in access.
Alternatively, the method also comprises:
ENB selects to be redirected contained fan from the contained fan of adjacent eHRPD;
ENB sends redirect message to terminal, and redirect message comprises the frequency corresponding with redirected contained fan and PN code.
Alternatively, eNB selects redirected contained fan to comprise from the contained fan of adjacent eHRPD:
ENB from each contained fan of adjacent eHRPD, select signal quality to be greater than redirect signal quality threshold and the minimum contained fan of load as redirected contained fan.
Alternatively, the method also comprises:
ENB obtains the signal quality of each contained fan of adjacent eHRPD according to MeasurementReport (measurement report) message of terminal to report;
ENB obtains the load information of each contained fan of adjacent eHRPD according to Inter-SON (Inter Radio Aceess Technology-SelfOrganization Network, the self-organizing network between different radio access technologies).
Alternatively, terminal receives from after the redirect message of eNB, does not carry out Hash with the load of balanced eHRPD multicarrier, directly accesses the redirected contained fan of eHRPD.
According to a further aspect in the invention, a kind of terminal is provided, comprises:
Redirect message receiver module, for receiving the redirect message from eNB, redirect message comprises frequency and PN code;
Network handover module, for determining redirected contained fan according to frequency and PN code, makes terminal leave the redirected contained fan of LTE access eHRPD.
Alternatively, network handover module does not carry out Hash with the load of balanced eHRPD multicarrier, directly accesses the redirected contained fan of eHRPD.
According to another aspect of the invention, a kind of eNB is provided, comprises:
Being redirected contained fan and selecting module, being redirected contained fan for selecting in the contained fan from adjacent eHRPD;
Redirect message sending module, for sending redirect message to terminal, redirect message comprises the frequency corresponding with redirected contained fan and PN code, so that terminal access eHRPD is by frequency and the well-determined redirected contained fan of PN code.
Alternatively, be redirected contained fan select module to select signal quality to be greater than redirect signal quality threshold from each contained fan of adjacent eHRPD and the minimum contained fan of load as redirected contained fan.
Alternatively, this eNB also comprises:
Signal quality acquisition module, for obtaining the signal quality of each contained fan of adjacent eHRPD according to the MeasurementReport message of terminal to report;
Load information acquisition module, for obtaining the load information of each contained fan of adjacent eHRPD according to Inter-SON.
According to another aspect of the invention, provide the switched system of a kind of LTE to eHRPD, comprise above-mentioned terminal and eNB.
An advantage of the present invention is, eNB specifies and is redirected contained fan in redirect message, and terminal directly accesses this redirected contained fan, decreases handover delay.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present invention, further feature of the present invention and advantage thereof will become clear.
Accompanying drawing explanation
What form a part for specification drawings describes embodiments of the invention, and together with the description for explaining principle of the present invention.
With reference to accompanying drawing, according to detailed description below, clearly the present invention can be understood, wherein:
Fig. 1 is the flow chart of an embodiment of changing method according to LTE to eHRPD of the present invention;
Fig. 2 is the flow chart of another embodiment of changing method according to LTE to eHRPD of the present invention;
Fig. 3 is the flow chart of another embodiment of changing method according to LTE to eHRPD of the present invention;
Fig. 4 is the structure chart of an embodiment of switched system according to LTE to eHRPD of the present invention;
Fig. 5 is the structure chart of an embodiment according to eNB of the present invention.
Embodiment
Various exemplary embodiment of the present invention is described in detail now with reference to accompanying drawing.It should be noted that: unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit the scope of the invention.
Meanwhile, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not draw according to the proportionate relationship of reality.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part of authorizing specification.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
Fig. 1 illustrates the flow chart of an embodiment of the changing method according to LTE to eHRPD of the present invention.
As shown in Figure 1, step 102, terminal receives the redirect message (RRCConnectionRelease) from eNB, and this redirect message comprises frequency and PN code.
In one embodiment, the content of redirect message comprises: what system release cause value, redirected carrier frequency information (are redirected to, such as arrive cdma2000-HRPD), bandclass (frequency range), frequency, PN (Pseudo-Noise, pseudo random sequence) code information.Wherein, PN code is the field increased in redirect message in the disclosure.
Step 104, terminal leaves LTE network, by frequency and the well-determined redirected contained fan of PN code in access eHRPD network.
Terminal receives after the redirect message of terminal is handed down in LTE side and leaves LTE system, then goes to catch the frequency of specifying in redirect message, and this frequency is the frequency of eHRPD; After capturing eHRPD frequency, the redirect message receiving eHRPD specifies the system message of contained fan, and this system message is the system message of eHRPD.
Existing scheme only has frequency point information in redirect message, and eNB generally selects frequency or fixing selection extensively to cover frequency according to poll.In above-described embodiment, eNB comprises frequency point information and PN code at redirect message, terminal receives after redirect message leaves LTE network and directly accesses by frequency and the well-determined redirected contained fan of PN code, terminal no longer needs Hash, avoid the terminal when the frequency that frequency and the eNodeB of Hash specify is inconsistent to need to leave frequency that eNodeB specifies to the frequency of Hash and upgrade system message, reduce LTE to eHRPD non-optimized switchover time delay larger.
Fig. 2 illustrates the flow chart of another embodiment of the changing method according to LTE to eHRPD of the present invention.
As shown in Figure 2, step 202, eNB obtains the load information of each contained fan of adjacent eHRPD.
Step 204, eNB selects the contained fan of eHRPD least-loaded as redirected contained fan according to the load information of each contained fan of eHRPD, obtains frequency and the PN code of this redirected contained fan.
Step 206, eNB sends redirection information to terminal, and redirection information comprises frequency and the PN code of redirected contained fan.
Step 208, terminal receives the redirect message from eNB.
Step 210, terminal leaves LTE, directly accesses in eHRPD network by this frequency and the well-determined redirected contained fan of PN code.
Existing scheme terminal also needs Hash with the load of balanced eHRPD multicarrier, thus causes handover delay larger.In above-described embodiment, eNB by terminal switch to the load considering eHRPD contained fan during eHRPD in advance, eNB is according to the contained fan of the load information chosen in advance least-loaded of each contained fan, then the frequency of this contained fan and PN code are sent to terminal, terminal directly accesses the contained fan of this least-loaded, decreases handoff delay and improves the load balancing of system.
Fig. 3 illustrates the flow chart of another embodiment of the changing method according to LTE to eHRPD of the present invention.
As shown in Figure 3, step 302, eNB obtains the signal quality of each contained fan of adjacent eHRPD.In one embodiment, eNB obtains the signal quality of each contained fan of adjacent eHRPD according to MeasurementReport (measurement report) message of terminal to report.
Step 304, eNB obtains the load information of each contained fan of adjacent eHRPD.In one embodiment, eNB obtains the load information of each contained fan of adjacent eHRPD according to Inter-SON.
Step 306, eNB selects to be redirected contained fan according to the signal quality of each contained fan and load.In one embodiment, eNB select the signal quality in each contained fan of adjacent eHRPD to be greater than eHRPD redirect signal quality threshold and the contained fan of least-loaded as redirected contained fan.In another embodiment, eNB selects the contained fan of signal quality and load overall target optimum as redirected contained fan.
Step 308, eNB sends redirect message to terminal, increases PN code in redirect message, uniquely determines redirected contained fan by frequency and PN.
Step 310, terminal receives the redirect message from eNB.
Step 312, terminal leaves LTE, directly accesses eHRPD by frequency and the well-determined redirected contained fan of PN code.
In above-described embodiment, the signal quality of each contained fan of the comprehensive adjacent eHRPD of eNB and load information are selected to be redirected contained fan, terminal directly accesses the redirected contained fan of specifying in redirect message, not only reduces handover delay, has also taken into account signal quality and system load balancing.
Fig. 4 is the structure chart of an embodiment of switched system according to LTE to eHRPD of the present invention.As shown in Figure 4, this embodiment comprises eNB41 and terminal 42.
In one embodiment, eNB41 comprises redirected contained fan selection module 411 and redirect message sending module 412.Wherein, being redirected contained fan and selecting module 411, being redirected contained fan for selecting in the contained fan from adjacent eHRPD; Redirect message sending module 412, for sending redirect message to terminal, redirect message comprises the frequency corresponding with redirected contained fan and PN code, so that terminal 42 accesses eHRPD by described frequency and the well-determined redirected contained fan of PN code.
In one embodiment, terminal 42 comprises redirect message receiver module 421 and network handover module 422.Redirect message receiver module 421, receives the redirect message from eNB, and this redirect message comprises frequency and PN code; Network handover module 422, for determining redirected contained fan according to frequency and PN code, makes terminal leave the redirected contained fan of LTE access eHRPD.Network handover module 422 does not carry out Hash with the load of balanced eHRPD multicarrier, directly accesses the redirected contained fan of eHRPD.
In above-described embodiment, eNB by terminal switch to the contained fan selecting eHRPD during eHRPD in advance, eNB comprises frequency point information and PN code at redirect message, terminal receives after redirect message leaves LTE network and directly accesses by frequency and the well-determined redirected contained fan of PN code, terminal no longer needs Hash, avoid the terminal when the frequency that frequency and the eNodeB of Hash specify is inconsistent to need to leave frequency that eNodeB specifies to the frequency of Hash and upgrade system message, reduce LTE to eHRPD non-optimized switchover time delay larger.
Fig. 5 is the structure chart of an embodiment according to eNB of the present invention.As shown in Figure 5, in this embodiment, eNB comprises redirected contained fan and selects module 511, redirect message sending module 412, also comprises signal quality acquisition module 513 and load information acquisition module 514.Wherein, signal quality acquisition module 513, obtains the signal quality of each contained fan of adjacent eHRPD according to the MeasurementReport message of terminal to report; Load information acquisition module 514, obtains the load information of each contained fan of adjacent eHRPD according to Inter-SON.Be redirected contained fan select module 511 to select signal quality to be greater than redirect signal quality threshold from each contained fan of adjacent eHRPD and the minimum contained fan of load as described redirected contained fan.
ENB by terminal switch to the information such as load and signal quality considering eHRPD contained fan during eHRPD in advance, select preferred contained fan in advance, make terminal can directly access preferred contained fan according to redirect message, decrease handover delay, and ensure that signal quality and load balancing.
In existing scheme, LTE to eHRPD does not consider the load balancing of eHRPD multicarrier before switching, and realizes eHRPD multicarrier load balancing after switching by hash algorithm, switches duration so longer.In the disclosure in some intelligent embodiment schemes, eNB obtains the load of eHRPD each contained fan according to Inter-SON, and by terminal switch to the minimum eHRPD contained fan of load, terminal no longer needs to carry out Hash, thus minimizing handover delay.
So far, changing method, system, terminal and the eNB according to LTE to eHRPD of the present invention has been described in detail.In order to avoid covering design of the present invention, details more known in the field are not described.Those skilled in the art, according to description above, can understand how to implement technical scheme disclosed herein completely.
Method and system of the present invention may be realized in many ways.Such as, any combination by software, hardware, firmware or software, hardware, firmware realizes method and system of the present invention.Said sequence for the step of described method is only to be described, and the step of method of the present invention is not limited to above specifically described order, unless specifically stated otherwise.In addition, in certain embodiments, can be also record program in the recording medium by the invention process, these programs comprise the machine readable instructions for realizing according to method of the present invention.Thus, the present invention also covers the recording medium stored for performing the program according to method of the present invention.
Although be described in detail specific embodiments more of the present invention by example, it should be appreciated by those skilled in the art, above example is only to be described, instead of in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can without departing from the scope and spirit of the present invention, above embodiment be modified.Scope of the present invention is limited by claims.
Claims (11)
1. long-term evolving network LTE is to a changing method of the high-speed grouped data network eHRPD of evolution, it is characterized in that, comprising:
Terminal receives the redirect message from evolved base station eNB, and described redirect message comprises frequency and pseudo random sequence PN code;
Described terminal leaves LTE, and eHRPD is by described frequency and the well-determined redirected contained fan of PN code in access.
2. method according to claim 1, is characterized in that, also comprises:
Described eNB selects to be redirected contained fan from the contained fan of adjacent eHRPD;
Described eNB sends redirect message to described terminal, and described redirect message comprises the frequency corresponding with described redirected contained fan and PN code.
3. method according to claim 1, is characterized in that, described eNB selects to be redirected contained fan and comprises from the contained fan of adjacent eHRPD:
Described eNB from each contained fan of adjacent eHRPD, select signal quality to be greater than redirect signal quality threshold and the minimum contained fan of load as described redirected contained fan.
4. method according to claim 3, is characterized in that, also comprises:
ENB obtains the signal quality of each contained fan of adjacent eHRPD according to the measurement report message of terminal to report;
ENB obtains the load information of each contained fan of adjacent eHRPD according to the self-organizing network Inter-SON between different radio access technologies.
5. method as claimed in any of claims 1 to 4, is characterized in that, described terminal receives from after the redirect message of eNB, does not carry out Hash Hash with the load of balanced eHRPD multicarrier, directly accesses the described redirected contained fan of eHRPD.
6. a terminal, is characterized in that, comprising:
Redirect message receiver module, for receiving the redirect message from evolved base station eNB, described redirect message comprises frequency and PN code;
Network handover module, for determining redirected contained fan according to described frequency and pseudo random sequence PN code, makes described terminal leave the described redirected contained fan of the high-speed grouped data network eHRPD of long-term evolving network LTE access evolution.
7. terminal according to claim 6, is characterized in that, described network handover module does not carry out Hash Hash with the load of balanced eHRPD multicarrier, directly accesses the described redirected contained fan of eHRPD.
8. an evolved base station eNB, is characterized in that, comprising:
Being redirected contained fan and selecting module, being redirected contained fan for selecting in the contained fan of the high-speed grouped data network eHRPD from adjacent evolution;
Redirect message sending module, for sending redirect message to terminal, described redirect message comprises the frequency corresponding with described redirected contained fan and PN code, so that described terminal access eHRPD is by described frequency and the well-determined redirected contained fan of pseudo random sequence PN code.
9. eNB according to claim 8, is characterized in that, described redirected contained fan select module to select signal quality to be greater than redirect signal quality threshold from each contained fan of adjacent eHRPD and the minimum contained fan of load as described redirected contained fan.
10. eNB according to claim 9, is characterized in that, also comprises:
Signal quality acquisition module, for obtaining the signal quality of each contained fan of adjacent eHRPD according to the measurement report message of described terminal to report;
Load information acquisition module, for obtaining the load information of each contained fan of adjacent eHRPD according to the self-organizing network Inter-SON between different radio access technologies.
11. 1 kinds of long-term evolving network LTE, to the switched system of the high-speed grouped data network eHRPD of evolution, is characterized in that, comprise terminal as claimed in claims 6 or 7, and as the evolved base station eNB in claim 8 to 10 as described in any one.
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| CN201410176038.4A CN105025536A (en) | 2014-04-29 | 2014-04-29 | Long term evolution (LTE) to evolution high-rate packet data (eHRPD) switching method, LTE to eHRPD system, terminal and evolved node B (eNB) |
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Application publication date: 20151104 |