CN101651885A - Method for enhancing performance of control channels in communication systems - Google Patents
Method for enhancing performance of control channels in communication systems Download PDFInfo
- Publication number
- CN101651885A CN101651885A CN200810041662A CN200810041662A CN101651885A CN 101651885 A CN101651885 A CN 101651885A CN 200810041662 A CN200810041662 A CN 200810041662A CN 200810041662 A CN200810041662 A CN 200810041662A CN 101651885 A CN101651885 A CN 101651885A
- Authority
- CN
- China
- Prior art keywords
- unit group
- end message
- data
- invalid unit
- data cell
- 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
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004891 communication Methods 0.000 title claims abstract description 19
- 230000002708 enhancing effect Effects 0.000 title abstract description 3
- 238000013468 resource allocation Methods 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000005259 measurement Methods 0.000 claims description 9
- 238000012795 verification Methods 0.000 claims description 6
- 230000001174 ascending effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 101001018494 Homo sapiens Pro-MCH Proteins 0.000 description 1
- 102100033721 Pro-MCH Human genes 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Images
Abstract
The invention proposes a method for enhancing performance of control channels in communication systems. The method comprises the following steps: scheduling to-be-transmitted PDCCH information and acquiring initial resource allocation on PDCCH; marking an invalid unit group consisting of one or more consecutive invalid units in the initial resource allocation on the PDCCH; and assigning one or more terminal information repeatedly transmitted in a system to at least part of the invalid unit group. Terminals can combine the repeatedly transmitted information to obtain receiving gain so as to improve detection performance.
Description
Technical field
The present invention relates in the wireless communication system to reduce the method that strengthens the control channel performance in the method, particularly communication system of blind decoding search volume.
Background technology
Follow mobile network's extensive popularizing in the past twenty years such as GSM, global voice communication service has obtained great success.At present, Quan Qiu mobile voice user has surpassed 1,800,000,000.Simultaneously, our communication custom also evolves to the person to person from the past point-to-point (Place to Place).The fast development of personal communication has impelled greatly that the personal communication devices's is microminiaturized and diversified, in conjunction with the ability of data services such as Multimedia Message, game on line, video request program, music download and mobile TV, satisfied the demand of personal communication and amusement greatly.
At present, mobile radio system develops to broadband, portable direction, and communication terminal has been proposed high data bandwidth, low complex degree, low battery power consumption, and the requirement of spectral efficient.The use of OFDM/OFDMA technology has reduced the implementation complexity of wide-band communication system.The application of OFDM technological model such as the Long Term Evolution of 3GPP (Long term evolution, LTE) down link of system.
The TE system has defined 5 kinds of down channels at present: Physical Downlink Shared Channel PDSCH, Physical Broadcast Channel PBCH, Physical Multicast Channel PMCH, Physical Control Format Indicator Channel PC-FICH, physical downlink control channel PDCCH.
System has also defined 3 kinds of uplink physical channels: Physical Random Access Channel PRACH, Physical Uplink Shared Channel PUSCH, Physical Uplink Control Channel PUCCH.
PDCCH carrying scheduling distributes and other control informations.A PDCCH can launch one or more specific control channel unit (CCE, control channel element) (the control unit number is 1,2,4 and 8 at present).PDCCH is that a plurality of terminals are shared, and promptly a plurality of terminals are monitored a PDCCH simultaneously, and PDCCH is a terminal emission information in these terminals a time.For the terminal of selecting, network identifies mask on the check digit of information with it, has only the terminal that needs to receive can pass through to detect the information that acquisition needs like this.
So, for a terminal, just need carry out blind Detecting decoding, determine whether information is to oneself CCE number emission and information.Concrete grammar is that every kind of possible CCE form is deciphered, if by verification then stop and carrying out work according to the resource of distributing; Can not think that then these data do not issue this UE by decoding and verification if there is a kind of possible CCE form.
Since PDCCH be share and also may exist and not have the possibility of dispatching, so for particular terminal, its blind check measures the possible limited of own information.Therefore, most of times of terminal need be finished the blind Detecting work of various possible CCE, and the searching times of this moment is very big, and this detection performance for terminal is a challenge.
Simultaneously, because the shared characteristics of PDCCH, network need be dispatched between each terminal configuration, is not that maximum situation occurs so have at the required CCE of emission information.At this moment having number of C CE unit is wasted because of being assigned with (being called invalid unit (dummy element) in the agreement).
Summary of the invention
The purpose of this invention is to provide in a kind of communication system the method that strengthens the control channel performance,, be used for repeating to transmit effective information for the invalid unit among the PDCCH.
For achieving the above object, the present invention proposes to strengthen in a kind of communication system the method for control channel performance, comprises the steps: to dispatch for armed PDCCH information, obtains the initial resource allocation on the PDCCH; The invalid unit group that constitutes by one or more consecutive invalid unit in the initial resource allocation on the described PDCCH of mark; And in described invalid unit group to small part one or more end messages of repeat its transmission in the distribution system.
In one embodiment of this invention, comprise for step: the end message that the corresponding invalid unit group searching of a. can be used to launch to the end message of the described invalid unit set of dispense of small part repeat its transmission; B. if search the end message that can be used to launch, then described end message is assigned to repeat its transmission in the described invalid unit group.
In one embodiment of this invention, also comprise after the above-mentioned steps b, to next invalid unit group repeated execution of steps a, b.
In one embodiment of this invention, in above-mentioned steps a, the described end message that can be used to launch is not more than the length of described invalid unit group, and described invalid unit group is positioned on effective search volume of described end message counterpart terminal.
In one embodiment of this invention, if the described end message that can be used to launch that searches among the above-mentioned steps a is a plurality of, then the end message of selecting encoding rate to be lower than a thresholding among the step b is assigned in the described invalid unit group.
In one embodiment of this invention, if the described end message that can be used to launch that searches among the step a is a plurality of, then be assigned in the described invalid unit group according to encoding rate is ascending among the step b.
On the other hand, the present invention improves the method that strengthens the control channel performance in a kind of communication system, comprising: the total data in the demodulation terminal searching space, and according to elementary cell length dividing data; The data cell of dividing is carried out the first blind decoding search; Mark is not searched for the data cell of decoding and verification by the described first blind decoding; The data cell of institute's mark is carried out multiple possible combination based on similitude, the second blind decoding search is carried out in each combination; And export the information that first blind decoding search and the second blind decoding search in searching for.
In one embodiment of this invention, the data cell of institute's mark is carried out whole possible combination based on similitude.
In one embodiment of this invention, the data cell of institute's mark is carried out comprise: the similarity measurement that calculates signal in two data cells based on the step of the multiple possible combination of similitude; Calculate a reference tolerance relevant with the average power of signal in described two data cells; And described if described similarity measurement surpasses with reference to tolerance, then described two data cells are made up.
In one embodiment of this invention, described is that the average power of described two data cells is amassed with reference to thresholding is with one with reference to tolerance.
In one embodiment of this invention, the method for the similarity measurement R of signal is in the calculated data unit:
S wherein
1iBe i demodulating data of a data cell wherein, s
2iBe i demodulating data of another data cell, ' be conjugate operation, L is the data length of data cell.
Therefore, the method of enhancing control channel performance is utilized the invalid unit repeat its transmission useful information among the PDCCH in the communication system of the present invention, terminal can obtain receiving gain by the useful information of combination repeat its transmission, thereby improve the check feature of end side, and increased the radius of society of system thus, perhaps reduced the transmitting power of system, the latter further can reduce the interference between the sub-district.
Description of drawings
Fig. 1 be according to an embodiment of the invention method at the implementing procedure figure of network side.
Fig. 2 is the implementing procedure figure of the method for the one optimization embodiment according to the present invention at network side.
Fig. 3 be according to an embodiment of the invention method at the implementing procedure figure of end side.
Embodiment
According to the method that strengthens the control channel performance in the communication system of the present invention, for the invalid unit in the Physical Downlink Control Channel (PDCCH), be used for repeating to transmit effective information, terminal obtains receiving gain by merging, and detects performance thereby improve.
Below to specifically describe various aspects of the invention process.
Fig. 1 illustrates according to an embodiment of the invention method at the implementing procedure figure of network side.With reference to shown in Figure 1, present embodiment comprises the steps:
At step S1, network is dispatched for armed PDCCH information, obtains the initial resource allocation on the PDCCH;
At step S2, the invalid unit group that the invalid unit in the initial resource allocation on the mark PDCCH constitutes, these invalid unit group can comprise an invalid unit or a plurality of continuous invalid unit, thereby improve the resource that can launch;
Then,, as required, utilize some or all of invalid unit group to come the repeat its transmission end message, need to be about to one or more end messages of repeat its transmission to be assigned in these invalid unit group at step S3.
Step S4 after this, network will be launched according to the resource allocation among the step S3.
The principle that end message distributes is, the length of end message should be less than the length of its invalid unit group that is assigned with, and this invalid unit group should be positioned at the search volume of the pairing terminal of end message (being the purpose terminal that institute's desire sends).In addition, preferentially select the end message of poor-performing (being that encoding rate is lower) to carry out the distribution of repeat its transmission.Because these end messages all have been carried out initial resource allocation before, therefore after carrying out the repeat its transmission distribution, these end messages will obtain repeat its transmission and can have extra gain in terminal, thereby improve the detection performance of terminal.
Fig. 2 illustrates the implementing procedure figure of the method for the one optimization embodiment according to the present invention at network side.With reference to shown in Figure 2, wherein identical with Fig. 1 label is represented same or analogous step, and present embodiment comprises the steps:
At step S1, network is dispatched for armed PDCCH information, obtains the initial resource allocation on the PDCCH;
At step S2, the invalid unit group that the invalid unit in the initial resource allocation on the mark PDCCH constitutes, these invalid unit group can comprise an invalid unit or a plurality of continuous invalid unit, thereby improve the resource that can launch;
Then,, as required, utilize some or all of invalid unit group to come the repeat its transmission end message, need to be about to the end message of repeat its transmission to be assigned in these invalid unit group at step S3.In the present embodiment, this step can further comprise:
Step S31, the end message that a corresponding invalid unit group searching can be used to launch, the principle of search is, the length of this end message should be less than the length of its invalid unit group that is assigned with, and this invalid unit group should be positioned at the search volume of the pairing terminal of this end message (being the purpose terminal that institute's desire sends).
Step S32 if search the end message that can be used to launch, then is assigned in the invalid unit group end message with repeat its transmission.
What deserves to be mentioned is that the end message that can be used to launch that a corresponding invalid unit group searches among the step S31 can be one, also can be a plurality of.When end message when being a plurality of, can select be assigned to the end message of invalid unit group based on performance (being the encoding rate height), promptly encoding rate that (or those) end message of being lower than a thresholding is assigned to invalid unit group.Perhaps when end message when being a plurality of, then according to encoding rate ascending be order assignment to these end messages in these invalid unit group, promptly the end message that encoding rate is little can be by priority allocation.When end message is one, alternatively, can select whether to be assigned to invalid unit group according to the relation of its encoding rate and a thresholding.Yet these are set only is that those skilled in the art can also purpose according to the present invention make other arrangement for example.
Step 31,32 can be to follow-up invalid unit group repeated execution of steps, until there not being available emission information.
At last, at step S4, network will be launched according to the resource allocation among the step S3.
Fig. 3 be according to an embodiment of the invention method at the implementing procedure figure of end side.With reference to shown in Figure 3, present embodiment may further comprise the steps:
Step S11, the total data in its search volume of terminal demodulation, and according to elementary cell length dividing data;
Step S12 carries out the first blind decoding search to the data cell of dividing, and promptly judges according to the mode of decoding, verification whether information issues this terminal;
Step S13, mark do not search for the data cell of decoding and verification by the above-mentioned first blind decoding;
Step S14 for the data cell of institute's mark, carries out the multiple possible combination based on similitude, and the second blind decoding search is carried out in each combination; In this step, the similarity measurement that is used for estimating the similitude of two data cell signals surpasses one during with reference to tolerance, these two data unit are considered to carry out the same data cell of repeat its transmission, thereby can make up and form the bigger data cell of gain, thereby more likely by blind decoding search.
In the embodiment that optimizes, the data cell of institute's mark is carried out comprising based on the step of the multiple possible combination of similitude:
Calculate the similarity measurement of signal in two data cells.A kind of mode for example is:
S wherein
1iBe i demodulating data of a data cell wherein, s
2iBe i demodulating data of another data cell, ' be conjugate operation, L is the data length of data cell;
Calculate a reference tolerance relevant with the average power of signal in two data cells.For instance, reference tolerance can be that the average power P and of two data cells amasss with reference to thresholding T is, can be determined by system emulation with reference to thresholding T.
If above-mentioned similarity measurement R surpasses described with reference to tolerance P*T, then two data cells are made up.
As an example, the data cell of institute's mark can be carried out between any two search for to be used for the second blind decoding based on the whole possible combination of similitude.
Step S15 exports the information that searches in the first blind decoding search and the second blind decoding search.
In sum, embodiments of the invention utilization definition invalid unit is used for the repeat its transmission useful information, terminal can obtain receiving gain by the useful information of combination repeat its transmission, thereby improve the check feature of end side, and increased the radius of society of system thus, perhaps reduced the transmitting power of system, the latter further can reduce the interference between the sub-district.
Top description only is for principle of the present invention is described.In addition, to those skilled in the art, can be easy to carry out various modifications and distortion, therefore, also do not wish to limit the invention in diagram and described concrete structure of literal and the application scenario, all suitable distortion and equivalence are replaced and all are considered to drop in appended claims of the present invention and their the equivalent execution mode scope.
Claims (11)
1, strengthens the method for control channel performance in a kind of communication system, comprise the steps:
Dispatch for armed PDCCH information, obtain the initial resource allocation on the PDCCH;
The invalid unit group that constitutes by one or more consecutive invalid unit in the initial resource allocation on the described PDCCH of mark; And
One or more end message of repeat its transmission in the distribution system in described invalid unit group to small part.
2, the method for claim 1 is characterized in that, for the step to the end message of the described invalid unit set of dispense of small part repeat its transmission comprises:
A. the end message that a corresponding invalid unit group searching can be used to launch;
B. if search the end message that can be used to launch, then described end message is assigned to repeat its transmission in the described invalid unit group.
3, method as claimed in claim 2 is characterized in that, also comprises after the step b, to next invalid unit group repeated execution of steps a, b.
4, method as claimed in claim 2 is characterized in that, in step a, the described end message that can be used to launch is not more than the length of described invalid unit group, and described invalid unit group is positioned on effective search volume of described end message counterpart terminal.
5, method as claimed in claim 2 is characterized in that, if the described end message that can be used to launch that searches among the step a is a plurality of, then the end message of selecting encoding rate to be lower than a thresholding among the step b is assigned in the described invalid unit group.
6, method as claimed in claim 2 is characterized in that, if the described end message that can be used to launch that searches among the step a is a plurality of, then is assigned in the described invalid unit group according to encoding rate is ascending among the step b.
7, strengthen the method for control channel performance in a kind of communication system, comprising:
Total data in the demodulation terminal searching space, and according to elementary cell length dividing data;
The data cell of dividing is carried out the first blind decoding search;
Mark is not searched for the data cell of decoding and verification by the described first blind decoding;
The data cell of institute's mark is carried out multiple possible combination based on similitude, the second blind decoding search is carried out in each combination; And
Export the information that searches in the first blind decoding search and the second blind decoding search.
8, method as claimed in claim 7 is characterized in that, the data cell of institute's mark is carried out whole possible combination based on similitude.
9, method as claimed in claim 7 is characterized in that, the data cell of institute's mark is carried out comprising based on the step of the multiple possible combination of similitude:
Calculate the similarity measurement of signal in two data cells;
Calculate a reference tolerance relevant with the average power of signal in described two data cells;
If described similarity measurement surpasses described with reference to tolerance, then described two data cells are made up.
10, method as claimed in claim 9 is characterized in that, the average power that described reference tolerance is described two data cells and is amassed with reference to thresholding is.
11, method as claimed in claim 9 is characterized in that, the method for the similarity measurement R of signal is in the calculated data unit:
S wherein
1iBe i demodulating data of a data cell wherein, s
2iI demodulating data for another data cell is conjugate operation, and L is the signal length of data cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100416628A CN101651885B (en) | 2008-08-14 | 2008-08-14 | Method for enhancing performance of control channels in communication systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100416628A CN101651885B (en) | 2008-08-14 | 2008-08-14 | Method for enhancing performance of control channels in communication systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101651885A true CN101651885A (en) | 2010-02-17 |
| CN101651885B CN101651885B (en) | 2012-11-14 |
Family
ID=41673957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100416628A Active CN101651885B (en) | 2008-08-14 | 2008-08-14 | Method for enhancing performance of control channels in communication systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101651885B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014005322A1 (en) * | 2012-07-06 | 2014-01-09 | Nokia Siemens Networks Oy | Search spaces for wireless communications |
| CN103688588B (en) * | 2012-06-26 | 2018-05-11 | 华为技术有限公司 | Information transferring method, network node, user equipment and system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7317702B2 (en) * | 2004-07-30 | 2008-01-08 | Lucent Technologies Inc. | Method and apparatus for enhancing performance of channel quality indicator (CQI) channel in wireless communications system |
| CN101227717B (en) * | 2008-01-05 | 2012-07-04 | 中兴通讯股份有限公司 | User equipment, base station and method for testing and presenting PUCCH transmission state |
| CN101237611B (en) * | 2008-02-29 | 2012-02-08 | 中兴通讯股份有限公司 | Allocation method for HFDD user receiving/transmission mode |
-
2008
- 2008-08-14 CN CN2008100416628A patent/CN101651885B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103688588B (en) * | 2012-06-26 | 2018-05-11 | 华为技术有限公司 | Information transferring method, network node, user equipment and system |
| WO2014005322A1 (en) * | 2012-07-06 | 2014-01-09 | Nokia Siemens Networks Oy | Search spaces for wireless communications |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101651885B (en) | 2012-11-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20190246337A1 (en) | System information broadcast in machine-to-machine radio access systems | |
| CN101883369B (en) | Blind detection method | |
| US11206628B2 (en) | Method and equipment for selecting synchronization reference source for multi-carrier sidelink communication | |
| CN102882644B (en) | The check processing of Downlink Control Information, detection method and device | |
| US10212573B2 (en) | Coverage-deficient terminal connection procedures | |
| CN109417755A (en) | The method that concurrent link establishment and down link data for efficient WLAN are fetched | |
| CN117651335A (en) | Information transmission method and device | |
| CN106060948A (en) | Method and device for sending uplink information, method and device for sending downlink information, method and device for receiving downlink information and method and device for system scheduling | |
| CN107404369A (en) | A kind of method and apparatus in UE and base station in radio communication | |
| CN103238363A (en) | Method and device for transmitting downlink control signal in wireless communication system | |
| US20220247609A1 (en) | Method and apparatus for transmitting and receiving reference signal for sidelink data in wireless communication system | |
| CN106559809A (en) | System information sending method, method of reseptance, dispensing device and reception device | |
| CN106452700A (en) | Data transmission method and data transmission device | |
| CN107371261B (en) | Method, processing device and system for determining resource priority and UE | |
| CN115499113B (en) | Wireless communication method, wireless communication device, terminal device and network device | |
| CN103716917A (en) | Base station equipment, terminal equipment and communication system | |
| CN103155635A (en) | Base station, wireless communication method, program, wireless communication system, and wireless terminal | |
| TW202123750A (en) | Sequence based physical uplink control channel transmission | |
| CN110383736B (en) | Transmission method, device and equipment of feedback information and storage medium | |
| CN103533657A (en) | Method for allocating bandwidth for UE in communication network based on machine-type communication | |
| CN106877986B (en) | A kind of method and apparatus of narrowband wireless communication | |
| WO2017028052A1 (en) | Information transmission method, base station, and user equipment | |
| CN104066098A (en) | Method used for distributed wireless network and equipment thereof | |
| CN104378187A (en) | Downlink control channel processing method, device and system | |
| CN101651885B (en) | Method for enhancing performance of control channels in communication systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170120 Address after: 200127 room 3205F, building 707, Zhang Yang Road, Shanghai, China (Shanghai) free trade zone, No. 32 Patentee after: Xin Xin Finance Leasing Co.,Ltd. Address before: 201203 Shanghai city Zuchongzhi road Pudong Zhangjiang hi tech park, Spreadtrum Center Building 1, Lane 2288 Patentee before: Spreadtrum Communications (Shanghai) Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170707 Address after: 100033 room 2062, Wenstin Executive Apartment, 9 Financial Street, Beijing, Xicheng District Patentee after: Xin Xin finance leasing (Beijing) Co.,Ltd. Address before: 200127 room 3205F, building 707, Zhang Yang Road, Shanghai, China (Shanghai) free trade zone, No. 32 Patentee before: Xin Xin Finance Leasing Co.,Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20100217 Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Assignor: Xin Xin finance leasing (Beijing) Co.,Ltd. Contract record no.: 2018990000163 Denomination of invention: Method for enhancing performance of control channels in communication systems Granted publication date: 20121114 License type: Exclusive License Record date: 20180626 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200309 Address after: 201203 Zuchongzhi Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai 2288 Patentee after: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Address before: 100033 room 2062, Wenstin administrative apartments, 9 Financial Street B, Xicheng District, Beijing. Patentee before: Xin Xin finance leasing (Beijing) Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200529 Address after: 361012 unit 05, 8 / F, building D, Xiamen international shipping center, No.97 Xiangyu Road, Xiamen area, China (Fujian) free trade zone, Xiamen City, Fujian Province Patentee after: Xinxin Finance Leasing (Xiamen) Co.,Ltd. Address before: 201203 Zuchongzhi Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai 2288 Patentee before: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. |
|
| EC01 | Cancellation of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Assignor: Xin Xin finance leasing (Beijing) Co.,Ltd. Contract record no.: 2018990000163 Date of cancellation: 20210301 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20100217 Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Assignor: Xinxin Finance Leasing (Xiamen) Co.,Ltd. Contract record no.: X2021110000010 Denomination of invention: Methods of enhancing the performance of control channel in communication system Granted publication date: 20121114 License type: Exclusive License Record date: 20210317 |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230724 Address after: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech park, Spreadtrum Center Building 1, Lane 2288 Patentee after: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Address before: 361012 unit 05, 8 / F, building D, Xiamen international shipping center, 97 Xiangyu Road, Xiamen area, China (Fujian) pilot Free Trade Zone, Xiamen City, Fujian Province Patentee before: Xinxin Finance Leasing (Xiamen) Co.,Ltd. |