CN101350944B - Method and apparatus for eliminating interference of single frequency net - Google Patents
Method and apparatus for eliminating interference of single frequency net Download PDFInfo
- Publication number
- CN101350944B CN101350944B CN200710119336XA CN200710119336A CN101350944B CN 101350944 B CN101350944 B CN 101350944B CN 200710119336X A CN200710119336X A CN 200710119336XA CN 200710119336 A CN200710119336 A CN 200710119336A CN 101350944 B CN101350944 B CN 101350944B
- Authority
- CN
- China
- Prior art keywords
- mbms
- sfn
- cell
- information
- training sequence
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method for removing SFN disturbance, which comprises that before the multimedia broadcast/multicast service (MBMS) is transmitted, the resource information used by the MBMS is added into the system information and the system information is broadcasted in the relevant protection area of the SFN. With the invention, when the SFN technology is used for transmitting the MBMS, the information of physical resources, the special scrambling code and the training sequence code of the MBMS is transmitted to UEs in the SFN protection area through the system information. After the UE receives the system information, the time slot of the MBMS and the information of the scrambling code and training sequence code distributed to the MBMS could be known. When the UE receives services in the same time slot of the MBMS, the scrambling code and training sequence code distributed to the MBMS are adopted for coalition inspection. In this way, the disturbance from the SFN could be properly removed. The invention also discloses a device for removing the SFN disturbance.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to the method and apparatus that a kind of elimination SFN (SFN, SingleFrequency Network) disturbs.
Background technology
Insert in (TD-SCDMA) system at TD SDMA, the data of different user can be transmitted in different time slots in the same sub-district.When the data of different user in the same sub-district are transmitted in same time slot, then further it is distinguished through the difference in said time slot burst (Burst): in the same sub-district in the same time slot data of different user in different bursts, transmit.The duration of a burst is a time slot, comprising a training sequence part (Midamble Part), two data parts (Data Parts) and protection interval (Guard Period).The data division of burst is used for the data of transmission user, and the data division that different user happens suddenly in the same time slot in the same sub-district uses the specific scrambler (Scrambling Code) of different channel code and this sub-district that the data of wherein transmission are carried out spread spectrum; The training sequence part of burst is not carried user data, is used to transmit training sequence, and the training sequence part that different user happens suddenly in the same time slot in the same sub-district uses different training sequence codes (MidambleCodes) as training sequence.A burst in the described time slot promptly is a physical channel in the TD-SCDMA system.In the TD-SCDMA system, the physical channel of different user can transmit in different time slots or in the burst of the difference of same time slot in the same sub-district.
When transmitting in the difference burst of physical channel at same time slot of different user in the same sub-district; The fading characteristic of wireless channel can make the wireless signal of wherein transmission produce distortion; Thereby at receiver end, no longer complete quadrature between the spread spectrum data of the different user burst that process declines is when receiver carries out de-spreading operation to the data division that happens suddenly through the different user that declines; Receiver can not be separated the data division of user's burst from the data division of other user's bursts fully; Promptly to can the phase mutual interference between the detection of the data division of different user burst, thereby increase the error rate of receiver, reduce the detection performance of receiver.
For reducing the interference between the different user in the same time slot, promote the detection performance of receiver, can make UE carry out joint-detection.Joint-detection both can also can be directed against the different UEs in the same time slot in a plurality of homogeneous frequency adjacent areas to the different UEs in the same time slot in the sub-district.
Although adopt associated detection technique can reduce the interference between the different user in the same time slot; But when system adopts the SFN technology to send multi-medium multi-packet broadcasting/multicast service (MBMS); With SFN adjacent co-frequency cell on the region; Be SFN protection zone (SFN Guard Area), interior UE can't carry out joint-detection, also just can't eliminate the interference from the UE of same time slot in the SFN.
Summary of the invention
In view of this; The technical problem that the present invention solves provides the method and apparatus that a kind of SFN of elimination disturbs; So that the UE in the SFN protection zone can carry out joint-detection, thereby reduce of the interference of the interior signal of SFN to the UE on the same time slot in the adjacent co-frequency cell of SFN.
For this reason, technical scheme provided by the invention is following:
A kind of method of eliminating SFN SFN interference comprises:
Before sending multi-medium multi-packet broadcasting/multicast service MBMS, the employed resource information of said MBMS is added into system message;
Said system message is broadcasted in protection zone at relevant SFN.
Wherein, said resource information comprises: the employed time slot of said MBMS and scrambler, the training sequence code information of distributing to said MBMS.
Wherein, further comprise:
When the UE in the protection zone of said SFN receives business on the professional employed time slot of said MBMS, adopt scrambler, the training sequence code information of distributing to said MBMS to carry out joint-detection.
Wherein, in system message, setting up the cell SFN information of highest ranking, is the employed resource information of SFN to indicate the information of carrying in this cell and the sub-cell thereof;
Low grade at the highest said grade cell SFN information is set up middle-bracket cell timeslot list, adds the professional employed gap information of MBMS at this cell;
At the cell cell parameter ID that a grade is set up the lowest class that hangs down of said middle-bracket cell timeslot list, add MBMS professional scrambler, the training sequence code information distributed at this cell.
Based on said method, the present invention also proposes a kind of device that SFN SFN disturbs of eliminating, and comprising:
The information adding device is used for before sending multi-medium multi-packet broadcasting/multicast service MBMS, the employed resource information of said MBMS being added into system message; With
Radio unit is used for broadcasting said system message in the protection zone of relevant SFN.
Wherein, said resource information comprises: the employed time slot of said MBMS and scrambler, the training sequence code information of distributing to said MBMS.
Wherein, the information adding device comprises:
First module is used for setting up in system message the cell SFN information of highest ranking, is the employed resource information of SFN to indicate the information of carrying in this cell and the sub-cell thereof;
Unit second is used for setting up middle-bracket cell timeslot list in low grade of the highest said grade cell SFN information, adds the professional employed gap information of MBMS at this cell; With
Unit the 3rd is used for the cell cell parameter ID that a grade is set up the lowest class that hangs down at said middle-bracket cell timeslot list, adds MBMS professional scrambler, the training sequence code information distributed at this cell.
In the present invention, when adopting SFN technical transmission MBMS professional, can through system message with the professional place of this MBMS physical resource with and the information of specific scramble codes and training sequence code send to the UE in the SFN protection zone.After UE receives said system message, can learn the professional employed time slot of MBMS scrambler, the training sequence code information professional with distributing to MBMS.When UE receives business on the time slot identical with the professional employed time slot of MBMS, MBMS professional scrambler, training sequence code information are distributed in employing carried out joint-detection.Like this, just can eliminate interference preferably from SFN.
Description of drawings
Fig. 1 is the flow chart of the inventive method embodiment;
Fig. 2 is the sketch map of apparatus of the present invention embodiment.
Embodiment
In present associated detection technique; No matter be to be directed against with the different UEs in the same time slot in the sub-district; Still to the different UEs in the same time slot in a plurality of homogeneous frequency adjacent areas, each UE need know employed scrambler of other UE and training sequence code in the same time slot.UE learns in the same time slot just can carry out joint-detection according to relevant method behind the employed scrambler of other UE and training sequence code.
At present, in the UTRA TDD1.28Mcps of TD-SCDMA system, when transmitting in the difference burst of physical channel at same time slot of different user in the sub-district, the employed channel code of data division of different user burst is distributed by the grid side; The employed training sequence code of training sequence part of different user burst is produced through different cyclic shifts by the specific basic training sequences sign indicating number in this sub-district (Basic MidambleCode).
But when adopting SFN technical transmission MBMS professional, what the grid side adopted is specific scrambler and training sequence code, and therefore, the UE in the SFN protection zone can't learn said specific scrambler and training sequence code.This will cause the UE in the SFN protection zone can't carry out joint-detection, also just can't eliminate the interference from other UE of same time slot in the SFN.
Though through improving the method for joint-detection; Possibly make the UE in the SFN protection zone under the situation of not knowing said specific scrambler and training sequence code, carry out joint-detection; But can infer that this method will be very complicated, so the present invention does not change existing associated detecting method.
Through taking all factors into consideration, when adopting SFN technical transmission MBMS professional, can the specific scramble codes of this MBMS business and the information of training sequence code be sent to the UE in the SFN protection zone through system message.Like this, the UE in the SFN protection zone just can utilize said specific scramble codes and training sequence code and existing associated detection technique to carry out joint-detection, with the interference of the UE in the reduction SFN to other UE of same time slot in the adjacent co-frequency cell of SFN.
For making those skilled in the art understand the present invention better, below in conjunction with concrete embodiment method provided by the invention is specified, Fig. 1 is the flow chart of this embodiment.
Before sending a MBMS business, in step 11, confirm to send the professional SFN regional extent of this MBMS.
Wherein, the employed frequency of SFN is the professional employed frequency of said MBMS.
In step 12, confirm the protection zone of said SFN.
In step 13, the professional employed resource information of said MBMS is added into system message.
Wherein, said resource information comprises: the professional employed time slot of MBMS scrambler, the training sequence code information professional with distributing to this MBMS.
Wherein, said system message includes but not limited to: co-frequency cell information list (Intra-frequencycell info list) message.
When in system message, adding said resource information, at first in system message, set up a cell (IE, Inforrmation Element) SFN information, cell SFN information is the cell of highest ranking.Set up cell timeslot list in low grade of cell SFN information then, set up cell cell parameter ID in low grade of cell timeslot list at last.
The information that cell SFN information is used for indicating this cell and sub-cell thereof to carry is the employed resource information of SFN.The professional employed gap information of MBMS will be added into cell timeslotlist, distribute to MBMS professional scrambler, training sequence code information and will be added into cell cellparameter ID.
The Intra-frequency cell info list message of adding said resource information is as shown in table 1.
Table 1
| Information?Element/Group?name | Need | Multi | Type?and?reference | Semantics?description |
| CHOICE?Intra-frequency?cell?removal | OP? | Absence of this IE is equivalent to choice″Remove no intra-ffequencycells″. | ||
| >Remove?all?intra-frequency?cells | No?data | |||
| …… | …… | …… | …… | …… |
| >Cell?info | MP | Cell?info10.3.7.2 | This IE must be included for the serving cell when the IE″Intra frequency cell info list″is includedin System |
|
| >SFN?information | OP | When this co-frequency neighbor cell adopts SFN mode MBMS transmission professional, need the employed scrambler of corresponding time slot and training sequence code information be notified the user of this sub-district | ||
| >>timeslot?list | MP | 1to<?maxTS> | Adopt the professional time slot of SFN mode MBMS transmission |
| >>>cell?parameter?ID | MP | Integer(0..127) ? | Adopt professional employed scrambler of time slot and the training sequence code information of SFN mode MBMS transmission | |
| Cells?for?measurement ? | CV-BCHopt? | 1to ?<maxCellMeas>? | ||
| …… | …… | …… | …… | …… |
| Information?Element/Group?name | Need | Multi | Type?and?reference | Semantics?description |
In step 14, broadcast said system message in the protection zone of said SFN, thereby the professional employed time slot of said MBMS scrambler, the training sequence code information professional with distributing to this MBMS is notified to the UE in the said zone.
After UE receives said system message, can learn the professional employed time slot of MBMS scrambler, the training sequence code information professional with distributing to MBMS.When UE receives business on the professional employed time slot of MBMS, MBMS professional scrambler, training sequence code information are distributed in employing carried out joint-detection.Like this, just can eliminate interference preferably from SFN.
UE adopts and to distribute to the professional scrambler of MBMS, when training sequence code information is carried out joint-detection; Should adopt associated detecting method to the different UEs in the same time slot in a plurality of homogeneous frequency adjacent areas; This method is 03100670.1 referring to application number specifically, and name is called the application documents of " many yards collection of time slot CDMA system channel estimation methods ".
When the MBMS business of grid side transmission changed, correspondingly, the regional extent of SFN also changed probably, and the protection zone of SFN also will change thereupon.At this moment, the protection zone broadcast system message of the SFN that the grid side will be after variation.
Based on said method, the device that the present invention also provides a kind of SFN of elimination to disturb, Fig. 2 is this schematic representation of apparatus.The device of eliminating the SFN interference comprises information adding device S21 and radio unit S22.
Before sending a MBMS business, the grid side can confirm to send the professional SFN regional extent of this MBMS, and confirms the protection zone of said SFN.
Wherein, the employed frequency of SFN is the professional employed frequency of said MBMS.
Information adding device S21 adds into system message with the professional employed resource information of said MBMS.
Wherein, said resource information comprises: the professional employed time slot of MBMS scrambler, the training sequence code information professional with distributing to this MBMS; Said system message includes but not limited to Intra-frequency cellinfo list message.
After information adding device S21 adds into system message with the professional employed resource information of said MBMS; Radio unit S22 will broadcast said system message in the protection zone of said SFN, thereby the professional employed time slot of said MBMS scrambler, the training sequence code information professional with distributing to this MBMS is notified to the UE in the said zone.
After UE receives said system message, can learn the professional employed time slot of MBMS scrambler, the training sequence code information professional with distributing to MBMS.When UE receives business on the professional employed time slot of MBMS, MBMS professional scrambler, training sequence code information are distributed in employing carried out joint-detection.Like this, just can eliminate interference preferably from SFN.
Wherein, information adding device S21 can comprise three unit, is respectively first module, Unit second and Unit the 3rd.
When in system message, adding said resource information; First module is at first set up a cell SFN information in system message; Cell SFN information is the cell of highest ranking, and the information that is used for indicating this cell and sub-cell thereof to carry is the employed resource information of SFN.
Then, cell timeslotlist is set up in low grade of cell SFN information in Unit second, adds the professional employed gap information of MBMS at this cell.At last, cell cell parameter ID is set up in low grade of cell timeslot list in Unit the 3rd, adds MBMS professional scrambler, the training sequence code information distributed at this cell.
The Intra-frequency cell info list message of adding said resource information is as shown in table 1.
After UE receives said system message, can learn the professional employed time slot of MBMS scrambler, the training sequence code information professional with distributing to MBMS.When UE receives business on the professional employed time slot of MBMS, MBMS professional scrambler, training sequence code information are distributed in employing carried out joint-detection.Like this, just can eliminate interference preferably from SFN.
Those skilled in the art can understand, combine here various exemplary method step that the disclosed embodiments describe and device unit all can electronic hardware, software or the combination of the two realize.In order to be clearly shown that the interchangeability between the hardware and software, more than various exemplary steps and unit are all carried out description generally with its functional form.This functional be to realize or realize depending on certain applications and the design constraint of whole system institute's time with software with hardware.Those skilled in the art can be directed against each certain applications, realize in many ways described functional, but the result of this realization should not be construed as and on the contrary deviates from scope of the present invention.
Utilize general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logical device, discrete gate or transistor logic, discrete hardware components or the combination in any among them, can realize or carry out the various exemplary unit that combines embodiment disclosed herein to describe.General processor possibly be a microprocessor, but in another kind of situation, this processor possibly be processor, controller, microcontroller or the state machine of any routine.Processor also possibly be implemented as the combination of computing equipment, for example, and the combination of DSP and microprocessor, a plurality of microprocessor, one or more microprocessor or any other this kind structure that combines the DSP core more.
In conjunction with the step of the described method of above-mentioned disclosed embodiment can directly be presented as hardware, the two combination of the software module carried out by processor or this.Software module possibly be present in the storage media of RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, mobile disk, CD-ROM or any other form well known in the art.The coupling of a kind of exemplary storage medium and processor, thus make processor can be from this storage media read message, and can be to this storage media write information.In the replacement instance, storage media is the part of processor.Processor and storage media possibly be present among the ASIC.This ASIC possibly be present in the subscriber station.In a replacement instance, the discrete assembly that processor and storage media can be used as in the subscriber station exists.
According to the description of said disclosed embodiment, can make those skilled in the art can realize or use the present invention.To those skilled in the art, the various modifications of these embodiment are conspicuous, and the general principles of definition here also can be applied to other embodiment on the basis that does not depart from the scope of the present invention with purport.Above-described embodiment is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. eliminate the method that SFN SFN disturbs for one kind, it is characterized in that, comprising:
Before sending multi-medium multi-packet broadcasting/multicast service MBMS, the employed resource information of said MBMS is added into system message;
Wherein, said resource information comprises: the employed time slot of said MBMS and scrambler, the training sequence code information of distributing to said MBMS;
Said system message is broadcasted in protection zone at relevant SFN;
Wherein, when the UE in the protection zone of said SFN receives business on the professional employed time slot of said MBMS, adopt scrambler, the training sequence code information of distributing to said MBMS to carry out joint-detection.
2. the method that elimination SFN as claimed in claim 1 disturbs is characterized in that, in system message, sets up the cell SFN information of highest ranking, is the employed resource information of SFN to indicate the information of carrying in this cell and the sub-cell thereof;
Low grade at the highest said grade cell SFN information is set up middle-bracket cell timeslot list, adds the professional employed gap information of MBMS at this cell;
At the cell cell parameter ID that a grade is set up the lowest class that hangs down of said middle-bracket cell timeslot list, add MBMS professional scrambler, the training sequence code information distributed at this cell.
3. eliminate the device that SFN SFN disturbs for one kind, it is characterized in that, comprising:
The information adding device is used for before sending multi-medium multi-packet broadcasting/multicast service MBMS, the employed resource information of said MBMS being added into system message; Wherein, said resource information comprises: the employed time slot of said MBMS and scrambler, the training sequence code information of distributing to said MBMS;
Radio unit is used for broadcasting said system message in the protection zone of relevant SFN; Wherein, when the UE in the protection zone of said SFN receives business on the professional employed time slot of said MBMS, adopt scrambler, the training sequence code information of distributing to said MBMS to carry out joint-detection.
4. the device that elimination SFN as claimed in claim 3 disturbs is characterized in that the information adding device comprises:
First module is used for setting up in system message the cell SFN information of highest ranking, is the employed resource information of SFN to indicate the information of carrying in this cell and the sub-cell thereof;
Unit second is used for setting up middle-bracket cell timeslot list in low grade of the highest said grade cell SFN information, adds the professional employed gap information of MBMS at this cell; With
Unit the 3rd is used for the cell cell parameter ID that a grade is set up the lowest class that hangs down at said middle-bracket cell timeslot list, adds MBMS professional scrambler, the training sequence code information distributed at this cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710119336XA CN101350944B (en) | 2007-07-20 | 2007-07-20 | Method and apparatus for eliminating interference of single frequency net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710119336XA CN101350944B (en) | 2007-07-20 | 2007-07-20 | Method and apparatus for eliminating interference of single frequency net |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101350944A CN101350944A (en) | 2009-01-21 |
| CN101350944B true CN101350944B (en) | 2012-07-04 |
Family
ID=40269487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710119336XA Expired - Fee Related CN101350944B (en) | 2007-07-20 | 2007-07-20 | Method and apparatus for eliminating interference of single frequency net |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101350944B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8543872B2 (en) * | 2011-01-24 | 2013-09-24 | Infineon Technologies Ag | Detecting and eliminating potential performance degradation caused by neighboring identical scrambling codes |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1905382A (en) * | 2005-07-25 | 2007-01-31 | 上海原动力通信科技有限公司 | Combination testing method for shared frequency broadcasting/multicasting |
| CN1905398A (en) * | 2005-07-27 | 2007-01-31 | 上海原动力通信科技有限公司 | Broadcasting/multicasting service transmitting method for TDD system |
-
2007
- 2007-07-20 CN CN200710119336XA patent/CN101350944B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1905382A (en) * | 2005-07-25 | 2007-01-31 | 上海原动力通信科技有限公司 | Combination testing method for shared frequency broadcasting/multicasting |
| CN1905398A (en) * | 2005-07-27 | 2007-01-31 | 上海原动力通信科技有限公司 | Broadcasting/multicasting service transmitting method for TDD system |
Non-Patent Citations (1)
| Title |
|---|
| RITT et al..《1.28Mcps TDD MBMS Physical Layer Improvements:Overview and Impact to RAN1 Specifications (R1-071440)》.《1.28Mcps TDD MBMS Physical Layer Improvements:Overview and Impact to RAN1 Specifications (R1-071440)》.3GPP TSG RAN WG1#48bis,2007,1-6. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101350944A (en) | 2009-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5420574B2 (en) | Pilot grouping and set management in multi-carrier communication systems | |
| CN1977468B (en) | Method and arrangement for mitigation of intercell interference in a cellular communication system | |
| CN101548516B (en) | Beacon assisted cell search in a wireless communication system | |
| CN101536552B (en) | Wireless multicast broadcast service methods and apparatus | |
| CA2917280C (en) | Pilot grouping and route protocols in multi-carrier communication systems | |
| KR101020460B1 (en) | Method and apparatus for conveying control channel information in ofdma systems | |
| RU2604639C1 (en) | Method of processing an enhanced physical downlink control channel, device on side of network and user equipment | |
| US9049066B2 (en) | Method and apparatus for communication in a system employing differing transmission protocols | |
| WO2017054667A1 (en) | Method and device for transmitting synchronization signal | |
| JP5059877B2 (en) | Detection and efficient use of broadcast-only mode in cellular communication system operation | |
| CN101536449A (en) | Cell search based on beacon in a wireless communication system | |
| US9185571B2 (en) | Employing reference signals in communications | |
| CN102037656B (en) | Detection of time-domain sequences sent on a shared control channel | |
| CN108111287B (en) | Signal sending method and device and computer storage medium | |
| US20110292858A1 (en) | Broadcasting communication in a wireless communication system | |
| CN103843382A (en) | Method, base station and user equipment for transmitting broadcast message | |
| JP6321815B2 (en) | Method and apparatus for transmitting information and method and apparatus for receiving information | |
| CN109565770A (en) | For synchronous method and apparatus | |
| US20140003419A1 (en) | Orthogonal reference signal permutation | |
| CN101106391A (en) | Method, device and system for sending broadcast service in time division synchronization code division multi-address access system | |
| CN101350944B (en) | Method and apparatus for eliminating interference of single frequency net | |
| CN101449535A (en) | A method of configuring wireless resource for effective and efficient transmission in a wireless communication system | |
| CN101073215A (en) | Wireless communication method, communication terminal apparatus, and wireless communication system | |
| CN102362532B (en) | Method and equipment for informing use of sub-frames, method and equipment for processing sub-frames | |
| CN103178932A (en) | Method of blind decoding of control channel for wireless communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: INST OF TELECOMMUNICATION SCIENCE AND TECHNOLGOY Free format text: FORMER OWNER: DATANG MOBILE COMMUNICATION EQUIPMENT CO., LTD. Effective date: 20110420 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100083 NO. 29, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING TO: 100083 NO. 40, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20110420 Address after: 100083 No. 40, Haidian District, Beijing, Xueyuan Road Applicant after: Inst of Telecommunication Science and Technolgoy Address before: 100083 Haidian District, Xueyuan Road, No. 29, Applicant before: Datang Mobile Communication Equipment Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20210720 |