CN102377716A - Pre-compensation method and device for descending frequency offset of orthogonal frequency division multiple access (OFDMA) communication system - Google Patents
Pre-compensation method and device for descending frequency offset of orthogonal frequency division multiple access (OFDMA) communication system Download PDFInfo
- Publication number
- CN102377716A CN102377716A CN2010102571112A CN201010257111A CN102377716A CN 102377716 A CN102377716 A CN 102377716A CN 2010102571112 A CN2010102571112 A CN 2010102571112A CN 201010257111 A CN201010257111 A CN 201010257111A CN 102377716 A CN102377716 A CN 102377716A
- Authority
- CN
- China
- Prior art keywords
- frequency deviation
- value
- subcarrier
- compensation
- user terminal
- 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
Images
Abstract
The invention discloses a pre-compensation method and device for the descending frequency offset of an orthogonal frequency division multiple access (OFDMA) communication system. The method comprises the following steps: a base station obtains a frequency offset value and an ascending channel estimation value corresponding to a subcarrier occupied by a user terminal; the base station obtains the value of a frequency offset pre-compensation parameter corresponding to the subcarrier according to the frequency offset value, the ascending channel estimation value and the transceiving signal module of the OFDMA communication system relevant to the frequency offset; and the base station uses the obtained value of the frequency offset pre-compensation parameter to carry out frequency offset pre-compensation to a descending signal on the subcarrier occupied by the user terminal. According to the method and the device, the descending signal of user terminals which occupy different subcarriers can be subjected to frequency offset pre-compensation by a respective proper frequency offset pre-compensation parameter, and therefore the method and the device can be used for different occasions with bigger user equipment (UE) frequency offsets.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of OFDMA (OrthogonalFrequency Division Multiple Access, OFDM) communication system down link frequency deviation pre-compensation method and apparatus.
Background technology
Using OFDMA (Orthogonal Frequency Division MultipleAccess; OFDM) wireless telecommunication system of technology is such as 3GPP (3rdGeneration Partnership Project, 3G (Third Generation) Moblie partnership projects) LTE (Long Term Evolution; Long Term Evolution) in the system; If (UserEquipment UE) does not aim at the crystal oscillator of base station user terminal, and then downstream signal will receive the influence of frequency deviation.And when user terminal moved apace, Doppler effect also can cause the frequency deviation influence to downstream signal.And when this frequency deviation was big, interference and channel estimating phase deviation will reduce the performance of terminal receiver between the caused subcarrier of frequency deviation.Like this, just need carry out compensate of frequency deviation, solve the problem of the performance of the reduction terminal receiver that frequency deviation causes downstream signal.
At present; A kind of typical method that in correlation technique, downstream signal is carried out compensate of frequency deviation is: by the base station time domain signal of eating dishes without rice or wine is carried out frequency deviation pre-compensation, still, this method is owing to be at the inclined to one side precompensation of the enterprising line frequency of time domain; Signal on the different sub carrier is all carried out identical frequency deviation pre-compensation; Therefore, can't carry out the frequency deviation pre-compensation that is fit to separately, differ bigger scene thereby can not be used for the different user frequency deviation to the user's that takies different sub carrier downstream signal.
Summary of the invention
Main purpose of the present invention is to provide a kind of descending frequency deviation pre-compensation method and apparatus of ofdma communication system; Solving the above-mentioned compensate of frequency deviation that is fit to separately of can't carrying out the user's that takies different sub carrier downstream signal at least, thereby can not be used for the problem that the different user frequency deviation differs bigger scene.
According to an aspect of the present invention, a kind of descending frequency deviation pre-compensation method of OFDM ofdma communication system is provided, has comprised: the base station obtains pairing frequency deviation value of subcarrier and the uplink channel estimation value that user terminal takies; The base station obtains the value of the corresponding frequency deviation pre-compensation parameter of subcarrier according to the receiving and transmitting signal model of frequency deviation value, uplink channel estimation value and the ofdma communication system relevant with frequency deviation; Downstream signal on the subcarrier that the value that the frequency deviation pre-compensation parameter obtain is used in the base station takies user terminal carries out frequency deviation pre-compensation.
According to a further aspect in the invention, a kind of descending frequency deviation pre-compensation device of OFDM ofdma communication system is provided, has comprised: acquisition module is used to obtain pairing frequency deviation value of subcarrier and the uplink channel estimation value that user terminal takies; Computing module is used for the receiving and transmitting signal model according to frequency deviation value, uplink channel estimation value and the ofdma communication system relevant with frequency deviation, obtains the value of the corresponding frequency deviation pre-compensation parameter of subcarrier; Downstream signal on the subcarrier that compensating module, the value that is used to use the frequency deviation pre-compensation parameter that obtains take user terminal carries out frequency deviation pre-compensation.
Through the present invention; The corresponding concrete frequency deviation value of subcarrier that the base station takies according to user terminal calculates the value of concrete frequency deviation pre-compensation parameter; Use the value of this parameter to carry out frequency deviation pre-compensation to the downstream signal of this UE; Because the frequency deviation value difference that different subcarriers is corresponding; Thereby through having realized using different frequency deviation pre-compensation parameters to carry out frequency deviation pre-compensation doing frequency deviation pre-compensation on the frequency domain, can use the frequency deviation pre-compensation parameter that is fit to separately to carry out frequency deviation pre-compensation, differ bigger scene thereby can be used in the different UEs frequency deviation to the downstream signal of the user terminal that takies different sub carrier to the downstream signal on the different subcarriers.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the descending frequency deviation pre-compensation method of the ofdma communication system of the embodiment of the invention;
Fig. 2 is the descending frequency deviation pre-compensation schematic representation of apparatus according to the ofdma communication system in the ofdma communication system of the embodiment of the invention;
Fig. 3 is the descending frequency deviation pre-compensation schematic representation of apparatus of the ofdma communication system in the ofdma communication system according to the preferred embodiment of the invention.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Fig. 1 is according to the flow chart of the descending frequency deviation pre-compensation method of the ofdma communication system of the embodiment of the invention, may further comprise the steps:
Step S102, the base station obtains pairing frequency deviation value of subcarrier and the uplink channel estimation value that user terminal (UE) takies;
For example, UE1 takies the Resource Block 1 (being RB1) on the frequency domain, and RB1 then can obtain the pairing frequency deviation value f of 1-12 number of sub-carrier that this UE1 takies through frequency offset estimating corresponding to 1-12 number of sub-carrier (corresponding 12 number of sub-carrier of each RB)
1
In the process that reality is implemented, before descending frequency deviation pre-compensation is carried out in the base station, accomplished channel estimating and frequency offset estimating, in this step S102, only need directly obtain use and get final product.
Step S104, the base station obtains the value of the corresponding frequency deviation pre-compensation parameter of above-mentioned subcarrier according to the receiving and transmitting signal model of the frequency deviation value that gets access among the step S102 and uplink channel estimation value and the ofdma communication system relevant with frequency deviation;
Step S106, the downstream signal on the subcarrier that the value that the frequency deviation pre-compensation parameter obtain is used in the base station takies user terminal carries out frequency deviation pre-compensation.
In the correlation technique owing to be at the inclined to one side precompensation of the enterprising line frequency of time domain; Signal on the different sub carrier is all carried out identical frequency deviation pre-compensation; Therefore; Can't carry out the frequency deviation pre-compensation that is fit to separately to the user's that takies different sub carrier downstream signal, differ bigger scene thereby can not be used for the different user frequency deviation.And in this enforcement; The value that concrete frequency deviation value that the subcarrier that the base station takies according to UE is corresponding and uplink channel estimation value calculate concrete frequency deviation pre-compensation parameter; Use the value of this parameter to carry out frequency deviation pre-compensation to the downstream signal of this user terminal; Because the frequency deviation value of different subcarriers correspondence is different with the uplink channel estimation value; Thereby through having realized using different frequency deviation pre-compensation parameters to carry out frequency deviation pre-compensation doing frequency deviation pre-compensation on the frequency domain to the downstream signal on the different subcarriers; Can use the frequency deviation pre-compensation parameter that is fit to separately to carry out frequency deviation pre-compensation to the downstream signal of the user terminal that takies different sub carrier, differ bigger scene thereby can be used in the different user terminals frequency deviation.
In addition, this embodiment can be so that the performance that user terminal receives signal be improved in the base station when the downstream signal frequency deviation is big, and the corresponding frequency deviation of the subcarrier that takies at different user terminals is not simultaneously, does the related offset compensation separately.
Earlier the possible frequency deviation of user terminal is carried out precompensation during base station transmit signals.Below with 3GPP TDD LTE the Traffic Channel of wave beam forming to be arranged be example narration.Can be at first in step S104 derive the formula (2) that the frequency deviation pre-compensation parameter satisfies according to the receiving and transmitting signal model of system, the corresponding frequency deviation value substitution formula (2) of subcarrier that UE is taken can obtain the value of the corresponding frequency deviation pre-compensation parameter of subcarrier that this UE takies.Concrete comprise following content:
Traffic Channel behind 3GPP TDD (time division duplex) the LTE downlink forming eats dishes without rice or wine can represent as follows after the OFDM demodulation of signal through UE:
Above-mentioned formula (1) can be called the receiving and transmitting signal model of the system relevant with frequency deviation, and in this formula (1), k is an index of distributing to the subcarrier of certain UE; Y (k) is the reception signal on the k number of sub-carrier, and X (k) is transmitting on the k number of sub-carrier, and γ is normalized frequency deviation value; When subcarrier spacing is 15000Hz;
N is the sampling number of a single carrier symbol, and when system bandwidth was 20MHz, N was 2048; H (k) is the frequency domain channel impulse response on the k number of sub-carrier; I (k) be other subcarrier to the interference between the k number of sub-carrier, W (k) is a noise item
Then, above-mentioned formula (1) can be expressed as y=M (f) diag (X) h+n with matrix form.Wherein, diag (.) is for creating the function of diagonal matrix.Here M (f) is Toeplitz (Teoplitz) matrix, and M (f)=(a
K, l) each element definition following:
Calculate for simplifying, consider and disturb between subcarrier mainly, can let a from contiguous subcarrier
K, lIf=0 | k-l|＞C, three of constant C kinds of typical values are respectively 1,2,3 here.
Because before doing frequency deviation pre-compensation; Accomplish channel estimating (can obtain the corresponding pairing uplink channel estimation value of the different sub carrier h of different RB) and frequency offset estimating (can obtain the corresponding pairing frequency deviation value f of different sub carrier of different RB), obtained the value of the value h and the frequency deviation f of channel estimating.In the expression formula of M (f) above the corresponding concrete frequency deviation value substitution of the subcarrier that UE is taken, can calculate matrix M (value f).
If can obtain the uplink channel estimation value h of corresponding RB, according to formula (2): A=(diag (h))
-1M (f) calculates the value of corresponding preconditioning matrix (the being above-mentioned frequency deviation pre-compensation parameter) A of the corresponding subcarrier of RB that UE takies.
Then in step S106, the base station multiply by the preconditioning matrix A that calculates recently with the downlink signal s on each RB on the frequency domain (corresponding with UE) and is obtained the frequency-region signal A*s that will launch on this RB.
Obviously, the precompensation method of the foregoing description also can be used in up direction, if be used in up direction then executive agent in the said method step should be user terminal.
Fig. 2 is the descending frequency deviation pre-compensation device according to the ofdma communication system of the embodiment of the invention, comprising: acquisition module 10, computing module 20 and compensating module 30, wherein:
Downstream signal on the subcarrier that compensating module 30, the value that is used to use the frequency deviation pre-compensation parameter that obtains take user terminal carries out frequency deviation pre-compensation.
Preferably, ofdma communication system is a tdd systems; Computing module 20 can calculate the value A of frequency deviation pre-compensation parameter according to following formula (being above-mentioned formula (2)):
A=(diag (h))
-1(f), wherein, the function of diagonal matrix is created in diag (.) expression to M, and h representes the uplink channel estimation value corresponding with subcarrier, and f representes the frequency deviation value corresponding with subcarrier, M (f)=(a
K, l), wherein,
Above-mentioned preferred embodiment provides the descending Traffic Channel of doing wave beam forming when for the TDD system, and the base station calculates the specific embodiments of the value A of the corresponding frequency deviation pre-compensation parameter of subcarrier that UE takies.Use this formula can calculate the value of the pairing frequency deviation pre-compensation parameter of subcarrier that different UEs takies apace, thereby can be at the subcarrier that different UEs takies corresponding frequency deviation is not simultaneously, and different UE is done compensate of frequency deviation separately.
Preferably, as shown in Figure 3, acquisition module 10 comprises: determination module 102 is used for the Resource Block of confirming that user terminal takies; Obtain module 104, be used to obtain the frequency deviation value and the uplink channel estimation value of the pairing subcarrier of Resource Block that determination module 102 confirms.
Preferably; As shown in Figure 3; Compensating module 30 comprises: processing module 302, and the frequency deviation pre-compensation parameter that is used for computing module 20 is calculated on duty with the downstream signal of user terminal on the Resource Block that takies on the frequency domain obtains the frequency-region signal that will launch on this Resource Block; Transmitter module 304 is used for this frequency-region signal is transmitted into user terminal.
Obviously, Fig. 2 and device shown in Figure 3 can be the base station, if be used in the frequency deviation pre-compensation of up direction, this device also can be user terminal.
From above description; Can find out; The present invention has realized following technique effect: can make the base station when the downstream signal frequency deviation is big, improve the performance of the reception signal of UE, and can take the pairing frequency deviation of different sub carrier not simultaneously in different UEs, do the related offset compensation separately.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the descending frequency deviation pre-compensation method of an OFDM ofdma communication system is characterized in that, comprising:
The base station obtains pairing frequency deviation value of subcarrier and the uplink channel estimation value that user terminal takies;
Said base station obtains the value of the corresponding frequency deviation pre-compensation parameter of said subcarrier according to the receiving and transmitting signal model of said frequency deviation value, said uplink channel estimation value and the said ofdma communication system relevant with frequency deviation;
Downstream signal on the said subcarrier that the value that the said frequency deviation pre-compensation parameter that obtains is used in said base station takies said user terminal carries out frequency deviation pre-compensation.
2. method according to claim 1 is characterized in that, said ofdma communication system is a tdd systems; The value A of said frequency deviation pre-compensation parameter is calculated in said base station according to following formula:
A=(diag (h))
-1(f), wherein, the function of diagonal matrix is created in diag (.) expression to M, and h representes the uplink channel estimation value corresponding with said subcarrier, and f representes the frequency deviation value corresponding with said subcarrier, M (f)=(a
K, l), wherein,
3. method according to claim 1 and 2 is characterized in that, frequency deviation value and uplink channel estimation value that said base station obtains the subcarrier that user terminal takies comprise:
The Resource Block that said user terminal takies is confirmed in said base station;
Obtain the frequency deviation value and the uplink channel estimation value of the pairing subcarrier of said Resource Block.
4. method according to claim 1 and 2 is characterized in that, the downstream signal on the said subcarrier that the value that the said frequency deviation pre-compensation parameter that obtains is used in said base station takies said user terminal carries out frequency deviation pre-compensation and comprises:
The said frequency deviation pre-compensation parameter that said base station will calculate on duty with the downstream signal of said user terminal on the Resource Block that takies on the frequency domain obtains the frequency-region signal that will launch on the said Resource Block;
Said base station is transmitted into said user terminal with said frequency-region signal.
5. the descending frequency deviation pre-compensation device of an OFDM ofdma communication system is characterized in that, comprising:
Acquisition module is used to obtain pairing frequency deviation value of subcarrier and the uplink channel estimation value that user terminal takies;
Computing module is used for the receiving and transmitting signal model according to said frequency deviation value, said uplink channel estimation value and the said ofdma communication system relevant with frequency deviation, obtains the value of the corresponding frequency deviation pre-compensation parameter of said subcarrier;
Downstream signal on the said subcarrier that compensating module, the value that is used to use the said frequency deviation pre-compensation parameter that obtains take said user terminal carries out frequency deviation pre-compensation.
6. device according to claim 5 is characterized in that, said ofdma communication system is a tdd systems; Said computing module also is used for calculating according to following formula the value A of said frequency deviation pre-compensation parameter:
A=(diag (h))
-1(f), wherein, the function of diagonal matrix is created in diag (.) expression to M, and h representes the uplink channel estimation value corresponding with said subcarrier, and f representes the frequency deviation value corresponding with said subcarrier, M (f)=(a
K, l), wherein,
wherein; γ is normalized said frequency deviation value, and N is the sampling number of a single carrier symbol.
7. according to claim 5 or 6 described devices, it is characterized in that said acquisition module comprises:
Determination module is used for the Resource Block of confirming that said user terminal takies;
Obtain module, be used to obtain the frequency deviation value and the uplink channel estimation value of the pairing subcarrier of said Resource Block.
8. according to claim 5 or 6 described devices, it is characterized in that said compensating module comprises:
Processing module is used on duty with the downstream signal of said user terminal on the Resource Block that takies on the frequency domain with the said frequency deviation pre-compensation parameter that calculates, obtains the frequency-region signal that will launch on the said Resource Block;
Transmitter module is used for said frequency-region signal is transmitted into said user terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010257111.2A CN102377716B (en) | 2010-08-12 | 2010-08-12 | Pre-compensation method and device for descending frequency offset of orthogonal frequency division multiple access (OFDMA) communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010257111.2A CN102377716B (en) | 2010-08-12 | 2010-08-12 | Pre-compensation method and device for descending frequency offset of orthogonal frequency division multiple access (OFDMA) communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102377716A true CN102377716A (en) | 2012-03-14 |
| CN102377716B CN102377716B (en) | 2014-09-10 |
Family
ID=45795700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010257111.2A Active CN102377716B (en) | 2010-08-12 | 2010-08-12 | Pre-compensation method and device for descending frequency offset of orthogonal frequency division multiple access (OFDMA) communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102377716B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113765840A (en) * | 2020-06-05 | 2021-12-07 | 大唐移动通信设备有限公司 | Method and device for frequency offset precompensation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007078101A1 (en) * | 2005-12-30 | 2007-07-12 | Posdata Co., Ltd. | Apparatus and method for estimating carrier frequency offset in communication terminal, and communication terminal for performing the method |
| CN101184075A (en) * | 2007-12-13 | 2008-05-21 | 华为技术有限公司 | Frequency deviation compensation method and device |
| CN101567708A (en) * | 2008-04-22 | 2009-10-28 | 中兴通讯股份有限公司 | Frequency offset compensation method and device |
-
2010
- 2010-08-12 CN CN201010257111.2A patent/CN102377716B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007078101A1 (en) * | 2005-12-30 | 2007-07-12 | Posdata Co., Ltd. | Apparatus and method for estimating carrier frequency offset in communication terminal, and communication terminal for performing the method |
| CN101184075A (en) * | 2007-12-13 | 2008-05-21 | 华为技术有限公司 | Frequency deviation compensation method and device |
| CN101567708A (en) * | 2008-04-22 | 2009-10-28 | 中兴通讯股份有限公司 | Frequency offset compensation method and device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113765840A (en) * | 2020-06-05 | 2021-12-07 | 大唐移动通信设备有限公司 | Method and device for frequency offset precompensation |
| CN113765840B (en) * | 2020-06-05 | 2023-02-17 | 大唐移动通信设备有限公司 | Method and device for frequency offset precompensation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102377716B (en) | 2014-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109964435B (en) | Method and communication device for transmitting reference signal | |
| CN111698074B (en) | Common reference signal design based on semi-uniform pilot spacing and orthogonal cover codes | |
| KR101701899B1 (en) | 8-transmit antenna reference signal design for downlink communications in a wireless system | |
| CN103220723B (en) | Wireless communications method and device | |
| CN109156018B (en) | Data transmission method, terminal equipment and network equipment | |
| US20160330700A1 (en) | Method and apparatus for transmitting data between wireless devices in wireless communication system | |
| CN106656441B (en) | Method and apparatus for improving reliability of vehicle-to-vehicle communication | |
| CN104158619B (en) | A kind of LTE signal shielding methods and system based on CRS | |
| CN102714563B (en) | Radio base station apparatus, mobile terminal apparatus, wireless communications method and wireless communication system | |
| US11764925B2 (en) | Reference signal sending method and communications device | |
| CN101622793A (en) | Communication system, transmission device, reception device, and communication method | |
| CN103220070A (en) | Sending method for uplink signal and user equipment | |
| EP2573965A1 (en) | Transmitter, receiver, communication system, and communication method | |
| CN102263719B (en) | Frequency offset compensating and balancing method and device for orthogonal frequency division multiplexing system | |
| EP3446452B1 (en) | Radio transceiving device and method using waveform adaptation | |
| CN109196941A (en) | Communication means, terminal device and the network equipment based on wireless network | |
| EP3709591B1 (en) | Method and device used in user equipment and base station for wireless communication | |
| CN109691049A (en) | The transmission method and equipment of pilot signal | |
| CN109076034A (en) | Information transferring method and device | |
| CN103354659B (en) | The method of time offset and communicator thereof between dispose of communication apparatus and transfer point | |
| CN102457463B (en) | Frequency deviation estimating method and device | |
| US11245553B2 (en) | Channel estimation fields for wireless networks | |
| US10897338B2 (en) | Data transmission method, channel estimation method, and apparatus | |
| CN110050412A (en) | Method for transmitting signals and equipment | |
| CN102377716B (en) | Pre-compensation method and device for descending frequency offset of orthogonal frequency division multiple access (OFDMA) 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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20120314 Assignee: SANECHIPS TECHNOLOGY Co.,Ltd. Assignor: ZTE Corp. Contract record no.: 2015440020319 Denomination of invention: Pre-compensation method and device for descending frequency offset of orthogonal frequency division multiple access (OFDMA) communication system Granted publication date: 20140910 License type: Common License Record date: 20151123 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221101 Address after: 518055 Zhongxing Industrial Park, Liuxian Avenue, Xili street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: SANECHIPS TECHNOLOGY Co.,Ltd. Address before: 518057 No. 55 South Science and technology road, Shenzhen, Guangdong, Nanshan District Patentee before: ZTE Corp. |