CN104411012A - Method and system for measuring timing deviation between small cell and macro cell of LTE (long term evolution) system - Google Patents
Method and system for measuring timing deviation between small cell and macro cell of LTE (long term evolution) system Download PDFInfo
- Publication number
- CN104411012A CN104411012A CN201410730869.1A CN201410730869A CN104411012A CN 104411012 A CN104411012 A CN 104411012A CN 201410730869 A CN201410730869 A CN 201410730869A CN 104411012 A CN104411012 A CN 104411012A
- Authority
- CN
- China
- Prior art keywords
- base station
- mue
- macro base
- little
- little base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/002—Mutual synchronization
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method and system for measuring timing deviation between a small cell and a macro cell of an LTE (long term evolution) system. The method comprises the following steps: transmitting a random access sequence to an MUE (macrocell user equipment) by the small cell for performing initial timing deviation evaluation to acquire an initial timing deviation value T1; analyzing an MSG2 message fed back to the MUE by the macro cell to acquire a timing deviation value T2; according to the timing deviation value T1 and the timing deviation value T2, calculating to obtain the timing measurement deviation between the small cell and the macro cell, wherein the process for acquiring the initial timing deviation value T1 comprises the following steps: initiating a timing deviation measuring request to the macro cell by the small cell; after the macro cell receives the timing deviation measuring request, triggering the MUE in a coverage area to initiate random access and informing the small cell; after the small cell receives a notice, obtaining the random access sequence transmitted by the MUE; performing the initial timing deviation evaluation on the random access sequence transmitted by the MUE by the small cell to acquire the initial timing deviation value T1; the process for acquiring the timing deviation value T2 comprises the following steps: intercepting the MSG2 by the small cell at a time sequence position for the macro cell sending the MSG2, and analyzing to obtain TA, namely the T2.
Description
Technical field
The present invention relates to system of broadband wireless communication, more specifically, the present invention relates to the method and system that between the medium and small base station of LTE system and macro base station, timing offset is measured.
Background technology
Mobile communication technology evolves to 4G, transmission rate obtains lifting at double, but still cannot compared with user's request speedup, 4G epoch available frequency resources reduces day by day simultaneously, need to utilize high band to arrange net in dense city, but the penetration capacity of the higher macrocell base stations of frequency range to indoor is more weak, and base station density also needs significantly to promote, and the limitation of building new website in indoor place is increasing.Therefore operator to arrange net again simple solution in the urgent need to shunting macrocellular flow.Present femtocell(femtocell) be no longer confined to family market, application scenarios is more extensive, and with picocell(Pico cell), microcell(microcellulor) etc. be referred to as the little base station of Small cell(), in 4G networking, play the effect become more and more important.
LTE(Long Term Evolution, Long Term Evolution) be by 3GPP(The 3rd Generation Partnership Project, third generation partner program) the UMTS(Universal Mobile Telecommunications System that organizes to set up, universal mobile telecommunications system) Long Term Evolution of technical standard.LTE adopts multiple networking mode and the situation of depositing at present, and wherein Small Cell is technology main at present, and wherein product form is little base station.LTE system generally represents subscriber equipment with UE, represents macro base station user equipment with MUE.
Because communication system is stringent synchronization, little base station and macro base station are also stringent synchronization.In current LTE system, the method for synchronization of little base station has GPS, the mode of IEEE1588v2 and network monitoring, and due to the situation of disposing, the general mode adopting network monitoring, agreement is defined in its error in the case must not be greater than 3 microseconds.So the timing offset measurement of little base station and macro base station becomes key.But do not find that any technology is to measure the timing offset between macro base station and little base station at present.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides the method and system of the little base station of a kind of LTE system and the measurement of macro base station timing offset, thus solving the measurement problem of timing offset between little base station and macro base station.
Technical scheme of the present invention provides timing offset method of measurement between the little base station of a kind of LTE system and macro base station, comprises following steps:
Step 1, little base station utilizes Stochastic accessing to estimate partially to be worth T1 when obtaining initial, realizes as follows,
The request of timing offset measurement is initiated in little base station first to macro base station, macro base station triggers the MUE initiation Stochastic accessing in overlay area after receiving the request of measurement, MUE represents macro base station user equipment;
After the macro base station MUE triggered in overlay area initiates Stochastic accessing, notify little base station; Little base station, after receiving the notice of macro base station, obtains MUE and launches random access sequence;
Little base station is launched random access sequence to MUE and is carried out initial time offset estimation, is partially worth T1 when obtaining initial;
Step 2, the MSG2 information that macro base station feeds back to MUE is resolved in little base station, is partially worth T2, realizes as follows during acquisition,
After macro base station receives the accidental access signal of MUE, MSG2 is to MUE for feedback; Little base station is sent out the timing position of MSG2 intercepts at macro base station and is then resolved, obtain macro base station feed back to MUE time be partially worth T2; Described MSG2 is accidental access response message;
Step 3, little base station according to time be partially worth T1 and T2 and calculate timing deviation measurement between little base station and macro base station, realize as follows,
Partially be worth during acquisition T1 and time be partially worth T2 after, time to be partially worth T1 be distance time delay between little base station and MUE, time to be partially worth T2 be distance time delay between macro base station and MUE, obtain the timing offset between little base station and macro base station according to the delay inequality value of T1 and T2.
And in step 1, macro base station triggers MUE and initiates Stochastic accessing, and implementation is as follows,
By the S1 interface between macro base station, little base station informs that it needs to measure timing offset, macro base station sends the message triggering access to the MUE covered, carry the index of Preamble, so that MUE sends the Preamble that this index is specified in this message.
And in step 1, little base station is after receiving the notice of macro base station, and obtain MUE and launch random access sequence, implementation is as follows,
Little base station is sent request by S1 interface after receiving the notice of macro base station, does not then stop the response of monitoring macro base station, once receive the response of macro base station, intercepts the random access sequence of MUE immediately according to the Stochastic accessing sequential specified in 3gpp 36.321 agreement.
And in step 1, little base station is launched random access sequence to MUE and is carried out initial time offset estimation, and implementation is as follows,
Little base station by measuring the phase difference of Preamble sequence, and is worth T1 when obtaining initial partially.
The present invention also provides timing offset measuring system between the little base station of a kind of LTE system and macro base station, comprises with lower module:
Time be partially worth T1 acquisition module, for utilize in little base station Stochastic accessing estimate obtain initial time be partially worth T1, realize as follows,
The request of timing offset measurement is initiated in little base station first to macro base station, macro base station triggers the MUE initiation Stochastic accessing in overlay area after receiving the request of measurement, MUE represents macro base station user equipment;
After the macro base station MUE triggered in overlay area initiates Stochastic accessing, notify little base station; Little base station, after receiving the notice of macro base station, obtains MUE and launches random access sequence;
Little base station is launched random access sequence to MUE and is carried out initial time offset estimation, is partially worth T1 when obtaining initial;
Time be partially worth T2 acquisition module, for resolving the MSG2 information that macro base station feeds back to MUE in little base station, be partially worth T2 during acquisition, realize as follows,
After macro base station receives the accidental access signal of MUE, MSG2 is to MUE for feedback; Little base station is sent out the timing position of MSG2 intercepts at macro base station and is then resolved, obtain macro base station feed back to MUE time be partially worth T2; Described MSG2 is accidental access response message;
Timing deviation measurement acquisition module, in little base station according to time be partially worth T1 and T2 and calculate timing deviation measurement between little base station and macro base station, realize as follows,
Partially be worth during acquisition T1 and time be partially worth T2 after, time to be partially worth T1 be distance time delay between little base station and MUE, time to be partially worth T2 be distance time delay between macro base station and MUE, obtain the timing offset between little base station and macro base station according to the delay inequality value of T1 and T2.
And time is worth in T1 acquisition module partially, macro base station triggers MUE and initiates Stochastic accessing, and implementation is as follows,
By the S1 interface between macro base station, little base station informs that it needs to measure timing offset, macro base station sends the message triggering access to the MUE covered, carry the index of Preamble, so that MUE sends the Preamble that this index is specified in this message.
And time is worth in T1 acquisition module partially, little base station is after receiving the notice of macro base station, and obtain MUE and launch random access sequence, implementation is as follows,
Little base station is sent request by S1 interface after receiving the notice of macro base station, does not then stop the response of monitoring macro base station, once receive the response of macro base station, intercepts the random access sequence of MUE immediately according to the Stochastic accessing sequential specified in 3gpp 36.321 agreement.
And time is worth in T1 acquisition module partially, little base station is launched random access sequence to MUE and is carried out initial time offset estimation, and implementation is as follows,
Little base station by measuring the phase difference of Preamble sequence, and is worth T1 when obtaining initial partially.
The present invention creatively little base station of LTE system and macro base station timing offset measures solution, and be easy to implement, excellent effect, is suitable for applying.
Accompanying drawing explanation
Fig. 1 is step 1 flow chart in the embodiment of the present invention.
Fig. 2 is step 2 flow chart in the embodiment of the present invention.
Fig. 3 is step 3 flow chart in the embodiment of the present invention.
Fig. 4 is the overall flow figure of the embodiment of the present invention.
embodiment
Below in conjunction with drawings and Examples, technical solution of the present invention is described in detail.
Embodiment a kind of method measuring timing offset is provided, be included in MUE when carrying out Stochastic accessing macro base station, the accidental access signal that little base station can utilize MUE to launch and macro base station feed back to the descending TA(timing advance of MUE) timing offset carried out between little base station and macro base station measures.See Fig. 4, concrete steps are as follows:
Step 1: little base station utilizes Stochastic accessing to estimate partially to be worth T1 when obtaining initial.The present invention proposes, and macro base station triggers MUE and initiates Stochastic accessing, and time offset estimation is carried out to the random access sequence of macro base station MUE in little base station, is partially worth T1 during acquisition.
See Fig. 1, the step 1 of embodiment is implemented as follows:
M1: the request of timing offset measurement is initiated in little base station first to macro base station, after macro base station receives the request of measurement, the MUE that now macro base station can trigger in overlay area initiates Stochastic accessing.
Macro base station triggers MUE and initiates Stochastic accessing, specific implementation can be: by the S1 interface between macro base station, little base station informs that it needs to measure timing offset, macro base station sends to its MUE covered the message triggering access, carry Preamble(targeting sequencing in this Trigger message) index so that this subscriber equipment sends the Preamble that this index is specified.For example and without limitation, macro base station can be reserved and organize Preamble more, is exclusively used in the use that MUE needs in base station to report when carrying out interval search.
M2: after the macro base station MUE triggered in its overlay area initiates Stochastic accessing, notify little base station.Little base station, after receiving the notice of macro base station, according to the sequential of the Stochastic accessing that 3gpp 36.321 agreement specifies, first obtains MUE and launches random access sequence.3gpp 36.321 agreement defines the moment of starting random access sequence of base station and user.
The random access sequence that little base station intercepts macro base station MUE launches, specific implementation can be: macro base station is after triggering its MUE initiation Stochastic accessing covered, little base station can be informed, little base station is sent request by S1 interface after receiving the notice of macro base station, then just ceaselessly monitors the response that macro base station issues it.Little base station, once receive the response of macro base station, intercepts the random access sequence of MUE immediately according to the Stochastic accessing sequential specified in 3gpp 36.321 agreement.
M3: then little base station is launched random access sequence to MUE and carried out initial time offset estimation, is partially worth T1 when obtaining initial.
The time offset estimation of Stochastic accessing is carried out in little base station, specific implementation can be: little base station receives the sometimes inclined Preamble sequence of band that MUE sends, and little base station this index known, Preamble sequence can be detected in little like this base station, and is partially worth when estimating this MUE initial.Wherein, little base station by measuring the phase difference of this Preamble, and then is worth when obtaining partially, and its specific implementation can pass through existing algorithm realization, and it will not go into details in the present invention.
Step 2: the MSG2 information that macro base station feeds back to MUE is resolved in little base station, is partially worth T2 during acquisition.The present invention proposes, and macro base station feeds back to the MSG2 of MUE, and little base station is resolved the MSG2 that macro base station feeds back to MUE, is partially worth T2 during acquisition.MSG2 is accidental access response message.
See Fig. 2, the step 2 of embodiment is implemented as follows:
M4: after macro base station receives the accidental access signal of MUE, can feed back MSG2 to MUE, the sequential organization that little base station specifies according to 3gpp 36.321 agreement, and the timing position sending out MSG2 message at macro base station intercepts this message.
M5: after intercepting this message, this message is resolved in little base station, obtain macro base station feed back to MUE time be partially worth T2.
Step 3: little base station according to time be partially worth T1 and T2 and calculate the timing deviation measurement obtained between little base station and macro base station.
See Fig. 3, the step 3 of embodiment is implemented as follows:
M6: be partially worth during acquisition T1 and time be partially worth T2 after, time to be partially worth T1 be distance time delay between little base station and MUE, time to be partially worth T2 be distance time delay between macro base station and MUE, namely can obtain the timing offset between little base station and macro base station according to the time delay difference of T1 and T2.
Above method can adopt software engineering to realize automatically running, and the present invention also provides a kind of timing offset measuring system between the little base station of LTE system and macro base station accordingly, comprises with lower module:
Time be partially worth T1 acquisition module, for utilize in little base station Stochastic accessing estimate obtain initial time be partially worth T1, realize as follows,
The request of timing offset measurement is initiated in little base station first to macro base station, macro base station triggers the MUE initiation Stochastic accessing in overlay area after receiving the request of measurement, MUE represents macro base station user equipment;
After the macro base station MUE triggered in overlay area initiates Stochastic accessing, notify little base station; Little base station, after receiving the notice of macro base station, obtains MUE and launches random access sequence;
Little base station is launched random access sequence to MUE and is carried out initial time offset estimation, is partially worth T1 when obtaining initial;
Time be partially worth T2 acquisition module, for resolving the MSG2 information that macro base station feeds back to MUE in little base station, be partially worth T2 during acquisition, realize as follows,
After macro base station receives the accidental access signal of MUE, MSG2 is to MUE for feedback; Little base station is sent out the timing position of MSG2 intercepts at macro base station and is then resolved, obtain macro base station feed back to MUE time be partially worth T2; Described MSG2 is accidental access response message;
Timing deviation measurement acquisition module, in little base station according to time be partially worth T1 and T2 and calculate timing deviation measurement between little base station and macro base station, realize as follows,
Partially be worth during acquisition T1 and time be partially worth T2 after, time to be partially worth T1 be distance time delay between little base station and MUE, time to be partially worth T2 be distance time delay between macro base station and MUE, obtain the timing offset between little base station and macro base station according to the delay inequality value of T1 and T2.
Each module specific implementation is corresponding to method step, and it will not go into details in the present invention.
During concrete enforcement, those skilled in the art also can arrange module voluntarily and realize, such as a kind of little base station apparatus, comprising:
The trigger module M1 of the request of measuring is initiated to macro base station in little base station, the random access sequence module M2 of the MUE transmitting of little base station intercepts macro base station, initial time offset estimation module M3, intercept the MSG2 module M4 that macro base station feeds back to MUE, resolve the TA value module M5 of MSG2, calculate final timing deviation measurement module M6.
Initiate to macro base station the request of measuring in little base station apparatus, so that the specific implementation that macro base station triggers the trigger module M1 of MUE initiation Stochastic accessing can be: by the S1 interface between macro base station, little base station informs that it needs to measure timing offset, macro base station sends to its MUE covered the message triggering access, the index of Preamble is carried, so that this subscriber equipment sends the Preamble that this index is specified in this Trigger message.For example and without limitation, macro base station can be reserved and organize Preamble more, is exclusively used in the use that MUE needs in base station to report when carrying out interval search.
The specific implementation intercepting the random access sequence module M2 that macro base station MUE launches in little base station apparatus can be: macro base station is after triggering its MUE initiation Stochastic accessing covered, little base station can be informed, after little base station is sent request by S1, just ceaselessly monitor the response that macro base station issues it.Little base station, once receive the response of macro base station, intercepts the random access sequence of MUE immediately according to the Stochastic accessing sequential specified in agreement.
In little base station apparatus, the specific implementation of the time offset estimation unit M3 of Stochastic accessing can be: little base station receives the sometimes inclined Preamble sequence of band that MUE sends, and little base station this index known, Preamble sequence can be detected in little like this base station, and is partially worth when estimating this MUE initial.Wherein, little base station by measuring the phase difference of this Preamble, and then is worth when obtaining partially.Its specific implementation can pass through existing algorithm realization, is not repeating here.
Intercepting the specific implementation that macro base station feeds back to the MSG2 module M4 of MUE in little base station apparatus can be: after macro base station receives the accidental access signal of MUE, MSG2 can be fed back to MUE, the information of the Stochastic accessing that little base station specifies according to agreement and the sequential organization of Stochastic accessing, the timing position sending out MSG2 message at macro base station intercepts this message.
The specific implementation of resolving the TA value module M5 of MSG2 in little base station apparatus can be: after little base station intercepts feeds back to the MSG2 of MUE to macro base station, Stochastic accessing and initial network identity according to being whether type of competition separate MSG2, according to the field of Stochastic accessing in agreement, which includes the information of TA, obtain this field, namely obtain T2.
The specific implementation measuring the module M6 of little base station and macro base station timing offset in little base station apparatus can be: be partially worth time initial T1 and time be partially worth after T2 obtains simultaneously, because time to be partially worth T1 be distance time delay between little base station and MUE, time to be partially worth T2 be distance time delay between macro base station and MUE, namely can obtain the timing offset between little base station and macro base station according to the delay inequality difference of T1 and T2.
The device of above-mentioned little base station solves the measurement problem of timing offset between little base station and macro base station.
Above content is in conjunction with concrete execution mode further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (8)
1. a timing offset method of measurement between the little base station of LTE system and macro base station, is characterized in that, comprise following steps:
Step 1, little base station utilizes Stochastic accessing to estimate partially to be worth T1 when obtaining initial, realizes as follows,
The request of timing offset measurement is initiated in little base station first to macro base station, macro base station triggers the MUE initiation Stochastic accessing in overlay area after receiving the request of measurement, MUE represents macro base station user equipment;
After the macro base station MUE triggered in overlay area initiates Stochastic accessing, notify little base station; Little base station, after receiving the notice of macro base station, obtains MUE and launches random access sequence;
Little base station is launched random access sequence to MUE and is carried out initial time offset estimation, is partially worth T1 when obtaining initial;
Step 2, the MSG2 information that macro base station feeds back to MUE is resolved in little base station, is partially worth T2, realizes as follows during acquisition,
After macro base station receives the accidental access signal of MUE, MSG2 is to MUE for feedback; Little base station is sent out the timing position of MSG2 intercepts at macro base station and is then resolved, obtain macro base station feed back to MUE time be partially worth T2; Described MSG2 is accidental access response message;
Step 3, little base station according to time be partially worth T1 and T2 and calculate timing deviation measurement between little base station and macro base station, realize as follows,
Partially be worth during acquisition T1 and time be partially worth T2 after, time to be partially worth T1 be distance time delay between little base station and MUE, time to be partially worth T2 be distance time delay between macro base station and MUE, obtain the timing offset between little base station and macro base station according to the delay inequality value of T1 and T2.
2. timing offset method of measurement between the little base station of LTE system and macro base station according to claim 1, is characterized in that: in step 1, and macro base station triggers MUE and initiates Stochastic accessing, and implementation is as follows,
By the S1 interface between macro base station, little base station informs that it needs to measure timing offset, macro base station sends the message triggering access to the MUE covered, carry the index of Preamble, so that MUE sends the Preamble that this index is specified in this message.
3. timing offset method of measurement between the little base station of LTE system and macro base station according to claim 1, is characterized in that: in step 1, and little base station is after receiving the notice of macro base station, and obtain MUE and launch random access sequence, implementation is as follows,
Little base station is sent request by S1 interface after receiving the notice of macro base station, does not then stop the response of monitoring macro base station, once receive the response of macro base station, intercepts the random access sequence of MUE immediately according to the Stochastic accessing sequential specified in 3gpp 36.321 agreement.
4. timing offset method of measurement between the little base station of LTE system and macro base station according to claim 1, is characterized in that: in step 1, and little base station is launched random access sequence to MUE and carried out initial time offset estimation, and implementation is as follows,
Little base station by measuring the phase difference of Preamble sequence, and is worth T1 when obtaining initial partially.
5. a timing offset measuring system between the little base station of LTE system and macro base station, is characterized in that, comprise with lower module:
Time be partially worth T1 acquisition module, for utilize in little base station Stochastic accessing estimate obtain initial time be partially worth T1, realize as follows,
The request of timing offset measurement is initiated in little base station first to macro base station, macro base station triggers the MUE initiation Stochastic accessing in overlay area after receiving the request of measurement, MUE represents macro base station user equipment;
After the macro base station MUE triggered in overlay area initiates Stochastic accessing, notify little base station; Little base station, after receiving the notice of macro base station, obtains MUE and launches random access sequence;
Little base station is launched random access sequence to MUE and is carried out initial time offset estimation, is partially worth T1 when obtaining initial;
Time be partially worth T2 acquisition module, for resolving the MSG2 information that macro base station feeds back to MUE in little base station, be partially worth T2 during acquisition, realize as follows,
After macro base station receives the accidental access signal of MUE, MSG2 is to MUE for feedback; Little base station is sent out the timing position of MSG2 intercepts at macro base station and is then resolved, obtain macro base station feed back to MUE time be partially worth T2; Described MSG2 is accidental access response message;
Timing deviation measurement acquisition module, in little base station according to time be partially worth T1 and T2 and calculate timing deviation measurement between little base station and macro base station, realize as follows,
Partially be worth during acquisition T1 and time be partially worth T2 after, time to be partially worth T1 be distance time delay between little base station and MUE, time to be partially worth T2 be distance time delay between macro base station and MUE, obtain the timing offset between little base station and macro base station according to the delay inequality value of T1 and T2.
6. timing offset method of measurement between the little base station of LTE system and macro base station according to claim 5, is characterized in that: time is worth in T1 acquisition module partially, and macro base station triggers MUE and initiates Stochastic accessing, and implementation is as follows,
By the S1 interface between macro base station, little base station informs that it needs to measure timing offset, macro base station sends the message triggering access to the MUE covered, carry the index of Preamble, so that MUE sends the Preamble that this index is specified in this message.
7. timing offset method of measurement between the little base station of LTE system and macro base station according to claim 5, is characterized in that: time is worth in T1 acquisition module partially, and little base station is after receiving the notice of macro base station, and obtain MUE and launch random access sequence, implementation is as follows,
Little base station is sent request by S1 interface after receiving the notice of macro base station, does not then stop the response of monitoring macro base station, once receive the response of macro base station, intercepts the random access sequence of MUE immediately according to the Stochastic accessing sequential specified in 3gpp 36.321 agreement.
8. timing offset method of measurement between the little base station of LTE system and macro base station according to claim 5, is characterized in that: time is worth in T1 acquisition module partially, and little base station is launched random access sequence to MUE and carried out initial time offset estimation, and implementation is as follows,
Little base station by measuring the phase difference of Preamble sequence, and is worth T1 when obtaining initial partially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410730869.1A CN104411012B (en) | 2014-12-05 | Timing offset measuring method and system between the small base station of LTE system and macro base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410730869.1A CN104411012B (en) | 2014-12-05 | Timing offset measuring method and system between the small base station of LTE system and macro base station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104411012A true CN104411012A (en) | 2015-03-11 |
| CN104411012B CN104411012B (en) | 2018-02-09 |
Family
ID=
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968691A (en) * | 2021-02-10 | 2021-06-15 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Pulse time delay precision self-adaptive synchronization method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101154990A (en) * | 2006-09-28 | 2008-04-02 | 中国科学院上海微系统与信息技术研究所 | Synchronization method for multiple low-power launching pads leaded by high-power launching pad |
| US20130344878A1 (en) * | 2012-06-22 | 2013-12-26 | Nicholas William Whinnett | Femtocell base station synchronization |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101154990A (en) * | 2006-09-28 | 2008-04-02 | 中国科学院上海微系统与信息技术研究所 | Synchronization method for multiple low-power launching pads leaded by high-power launching pad |
| US20130344878A1 (en) * | 2012-06-22 | 2013-12-26 | Nicholas William Whinnett | Femtocell base station synchronization |
Non-Patent Citations (1)
| Title |
|---|
| 李小山等: "基于ＦＥＭＴＯ的邻区列表自配置策略", 《现代电子技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968691A (en) * | 2021-02-10 | 2021-06-15 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Pulse time delay precision self-adaptive synchronization method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11895520B2 (en) | SFTD and ANR specific reporting | |
| CN107439034B (en) | Method and apparatus for supporting licensed assisted access technology in wireless communication system | |
| CN109923890B (en) | Measurement method, terminal device, network device, and computer-readable storage medium | |
| EP3188534B1 (en) | User device, and offset reporting method | |
| EP4236590A3 (en) | Methods for reporting a secondary node failure in dual connectivity networks, user equipment and base station | |
| KR101344760B1 (en) | Apparatus and method for transmitting and receiving system information block in broadband wireless communication system | |
| EP2736284A1 (en) | Cell measurement method, information processing method, terminal, base station and network system | |
| US20160073442A1 (en) | Mobility handling for dual connectivity | |
| US10327194B2 (en) | Base station, network controller, and forward handover method | |
| JP6283110B2 (en) | Cell synchronization and synchronous cell indication | |
| WO2015196563A1 (en) | Method, device, terminal and base station for processing cell measurement | |
| WO2018090697A1 (en) | Lmu device fusion method, apparatus, and system | |
| US20180231648A1 (en) | System and method to measure ue-to-ue distance based on d2d sidelink channel | |
| EP2750443B1 (en) | Radio connection reestablishment method and user equipment | |
| US20210266802A1 (en) | Cell Global Identifier, CGI, Reporting of Enhanced LTE (ELTE) Cells | |
| US9148887B2 (en) | Mobile communication method, radio base station, and mobile station | |
| KR20170043526A (en) | Wideband ranging in cellular using unlicensed radio frequency spectrum band | |
| JP2017017369A (en) | Mobile station and mobile communication method | |
| US20140219116A1 (en) | Mobile communication method, core network device, radio base station and mobile station | |
| WO2016106563A1 (en) | Measurement method and device | |
| CN110351762A (en) | Measurement method and device | |
| WO2017005079A1 (en) | Data transmission method, device, and system | |
| US9473969B2 (en) | Spectrum sensing | |
| US20200396773A1 (en) | Determining device locations based on random access channel signaling | |
| WO2018099189A1 (en) | Cell merging and splitting method, apparatus and base station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 430205 Hubei city of Wuhan province Jiangxia Hidden Dragon Island Tan lake two Road No. 1 Patentee after: CITIC Mobile Communication Technology Co., Ltd Address before: 430073 Hubei province Wuhan Dongxin East Lake high tech Development Zone, Road No. 5 Patentee before: Wuhan Hongxin Telecommunication Technologies Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee after: CITIC Mobile Communication Technology Co.,Ltd. Address before: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee before: CITIC Mobile Communication Technology Co., Ltd |
|
| CP01 | Change in the name or title of a patent holder |