CN101938777A - Special reference signal mapping method and device for downlink terminal in LET (Long Term Evolution) system - Google Patents
Special reference signal mapping method and device for downlink terminal in LET (Long Term Evolution) system Download PDFInfo
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Abstract
The invention discloses special reference signal mapping method and device for a downlink terminal in a LET (Long Term Evolution) system. The method comprises the steps of: detecting a channel environmental parameter; comparing the channel environmental parameter with a preset parameter; and mapping one path or two paths of reference signals to a physical resource block of the LTE system according to a comparison result. The invention can be used for mapping two paths of reference signals to one physical resource block of the LET system when the channel environment is preferable, thereby achieving the technical effect of reducing system resource cost.
Description
Technical field
The present invention relates to the communications field, relate in particular to downstream station DRS (Dedicated Reference Signal) mapping method and device in a kind of long evolving system.
Background technology
In antenna system, antenna for base station is generally array antenna, this communication system adopts the wave beam forming technology, promptly according to the spatial character of signal transmission, by the space Digital Signal Processing, weight vector estimation of realization figuration or down beam shaping, thus reach the purpose that reduces interference, increase capacity, expansion covering, improves communication quality, reduction transmitting power and raising wireless data transmission rate.
At 3GPP LTE (3rd Generation Partnership Project Long Term Evolution, third generation collaborative project Long Term Evolution) in the communication protocol, adopt descending UE DRS (Dedicated Reference Signal) (UE-specific Reference Signals) to go up employing wave beam forming technology realization PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) transfer of data to be supported in single antenna port (being port 5).
At present, owing to only defined one group of UE DRS (Dedicated Reference Signal) in the 3GPP LTE36 system communication agreement, so downstream station DRS (Dedicated Reference Signal) mapping method is when channel circumstance is better in the long evolving system in the correlation technique, also two-way UE DRS (Dedicated Reference Signal) is mapped to respectively on two Physical Resource Block, causes system resource overhead big.
Summary of the invention
This bright purpose is to provide descending UE DRS (Dedicated Reference Signal) mapping method and device in a kind of LTE system, can solve the big technical problem of system resource overhead in the correlation technique.
According to an aspect of the present invention, provide downstream station DRS (Dedicated Reference Signal) mapping method in a kind of long evolving system, having comprised: detected the channel circumstance parameter; Channel circumstance parameter and the parameter that sets in advance are compared; According to comparative result with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system.
According to a further aspect in the invention, also provide downstream station DRS (Dedicated Reference Signal) mapping device in a kind of long evolving system, comprising: detection module is used to detect the channel circumstance parameter; Comparison module is used for channel circumstance parameter and the parameter that sets in advance are compared; Mapping block, be used for according to comparative result with one the road or the two-way reference signal be mapped to a Physical Resource Block of long evolving system.
By means of above-mentioned at least one technical scheme of the present invention, by detecting channel circumstance, and according to testing result select with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system, thereby can be when channel circumstance be better, the two-way reference signal is mapped on the Physical Resource Block of long evolving system, reaches the technique effect that reduces system resource overhead.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the data cache method that is used for the data traffic management of first embodiment of the invention;
Fig. 2 is the schematic diagram of the two-way reference signal position of method shown in Figure 1;
Fig. 3 is another schematic diagram of the two-way reference signal position of method shown in Figure 1;
Fig. 4 is the another schematic diagram of the two-way reference signal position of method shown in Figure 1;
Fig. 5 is the another schematic diagram of the two-way reference signal position of method shown in Figure 1;
Fig. 6 is the block diagram according to downstream station DRS (Dedicated Reference Signal) mapping device in the LTE system of second embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
In the following description, for the purpose of explaining, a plurality of specific details have been described, to provide to thorough of the present invention.Yet, obviously, do not having under the situation of these specific detail, also can realize the present invention, in addition, under the situation of not conflicting, promptly under the situation that does not deviate from the spirit and scope that claims illustrate, each details among following embodiment and the embodiment can be carried out various combinations.
First embodiment
Fig. 1 is the flow chart according to the data cache method that is used for the data traffic management of first embodiment of the invention.As shown in Figure 1, descending UE DRS (Dedicated Reference Signal) mapping method may further comprise the steps in the LTE system:
Step S102 detects the channel circumstance parameter;
Step S104 compares channel circumstance parameter and the parameter that sets in advance;
Step S106, according to comparative result with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system.
Descending UE DRS (Dedicated Reference Signal) mapping method is by detecting channel circumstance in the LTE system according to first embodiment of the invention, and according to testing result select with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system, thereby can be when channel circumstance be better, the two-way reference signal is mapped on the Physical Resource Block of long evolving system, reaches the technique effect that reduces system resource overhead.
Preferably, the channel circumstance parameter is a signal to noise ratio, according to comparative result with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system and specifically comprise: if the order of detected channel greater than the order that sets in advance, then is mapped to the two-way reference signal on the Physical Resource Block of long evolving system; If the order of detected channel less than the order that sets in advance, then is mapped to one tunnel reference signal respectively on the Physical Resource Block of long evolving system.It is consistent with 3GPP LTE communication protocol one tunnel reference signal to be mapped on the Physical Resource Block of LTE system employed method respectively, and can be set to 0 by individual layer/double-deck Status Flag this moment, and UE adopts the individual layer wave beam forming with notice.If adopt the two-way reference signal is mapped on the Physical Resource Block of long evolving system, then individual layer/double-deck Status Flag is set to 1, and UE adopts double-deck wave beam forming with notice.
Preferably, the channel circumstance parameter is a signal to noise ratio, according to comparative result with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system and specifically comprise: if detected signal to noise ratio greater than the signal to noise ratio that sets in advance, then is mapped to the two-way reference signal on the Physical Resource Block of long evolving system; If detected signal to noise ratio less than the signal to noise ratio that sets in advance, then is mapped to the two-way reference signal respectively on two Physical Resource Block of long evolving system.It is consistent with 3GPP LTE communication protocol one tunnel reference signal to be mapped on the Physical Resource Block of LTE system employed method respectively, and can be set to 0 by individual layer/double-deck Status Flag this moment, and UE adopts the individual layer wave beam forming with notice.If adopt the two-way reference signal is mapped on the Physical Resource Block of long evolving system, then individual layer/double-deck Status Flag is set to 1, and UE adopts double-deck wave beam forming with notice.
Preferably, the channel circumstance parameter is the error rate, according to comparative result with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system and specifically comprise: if the detected error rate greater than the error rate that sets in advance, then is mapped to one tunnel reference signal respectively on the Physical Resource Block of long evolving system; If the detected error rate less than the error rate that sets in advance, then is mapped to the two-way reference signal on the Physical Resource Block of long evolving system.It is consistent with 3GPP LTE communication protocol one tunnel reference signal to be mapped on the Physical Resource Block of LTE system employed method respectively, and can be set to 0 by individual layer/double-deck Status Flag this moment, and UE adopts the individual layer wave beam forming with notice.If adopt the two-way reference signal is mapped on the Physical Resource Block of long evolving system, then individual layer/double-deck Status Flag is set to 1, and UE adopts double-deck wave beam forming with notice.
Preferably, Physical Resource Block comprises 12 subcarriers on frequency domain, every road reference signal includes a plurality of reference signals, the two-way reference signal is mapped on the Physical Resource Block of long evolving system and specifically comprises: the two-way reference signal is mapped on N the orthogonal frequency division multiplex OFDM symbol of Physical Resource Block, wherein, the value of N is one of following: 3,4; Each road reference signal is mapped on M the subcarrier on the OFDM symbol, and wherein, the value of M is one of following: 3,4,6.With on the basis that does not increase system resource overhead, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPP LTE 36 system communication agreements is mapped in the Resource Block, reach the purpose of supported bilayer data beam figuration transmission, thereby realize reducing the purpose of system resource overhead.
Preferably, as shown in Figure 2, long evolving system adopts normal cyclic prefix, Physical Resource Block comprises 14 OFDM symbols in time domain, the two-way reference signal is mapped on 4 OFDM symbols of Physical Resource Block, and each road reference signal is mapped on 3 subcarriers on the OFDM symbol specifically comprises: a plurality of reference signals among the first via reference signal R51 are mapped to following time-frequency position: the 0th subcarrier of the 3rd OFDM symbol, the 4th subcarrier, the 8th subcarrier; The 0th subcarrier of the 9th OFDM symbol, the 4th subcarrier, the 8th subcarrier; A plurality of reference signals among the second tunnel reference signal R52 are mapped to following time-frequency position: the 2nd subcarrier of the 6th OFDM symbol, the 6th subcarrier, the 10th subcarrier; The 2nd subcarrier of the 12nd OFDM symbol, the 6th subcarrier, the 10th subcarrier.With on the basis that does not increase system resource overhead, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPP LTE 36 system communication agreements is mapped in the Resource Block, reach the purpose of supported bilayer data beam figuration transmission, thereby realize reducing the purpose of system resource overhead.
Preferably, as shown in Figure 3, long evolving system adopts normal cyclic prefix, Physical Resource Block comprises 14 OFDM symbols in time domain, the two-way reference signal is mapped on 4 OFDM symbols of Physical Resource Block, and each road reference signal is mapped on 6 subcarriers on the OFDM symbol specifically comprises: a plurality of reference signals among the first via reference signal R51 are mapped to following time-frequency position: the 0th subcarrier of the 3rd OFDM symbol, the 8th subcarrier; The 2nd subcarrier of the 6th OFDM symbol, the 10th subcarrier; The 4th subcarrier of the 9th OFDM symbol; The 6th subcarrier of the 12nd OFDM symbol; A plurality of reference signals among the second tunnel reference signal R52 are mapped to following time-frequency position: the 4th subcarrier of the 3rd OFDM symbol; The 6th subcarrier of the 6th OFDM symbol; The 0th subcarrier of the 9th OFDM symbol, the 8th subcarrier; The 2nd subcarrier of the 12nd OFDM symbol, the 10th subcarrier.With on the basis that does not increase system resource overhead, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPP LTE 36 system communication agreements is mapped in the Resource Block, reach the purpose of supported bilayer data beam figuration transmission, thereby realize reducing the purpose of system resource overhead.
Preferably, as shown in Figure 4, long evolving system adopts extended cyclic prefix, Physical Resource Block comprises 12 OFDM symbols in time domain, the two-way reference signal is mapped on 3 OFDM symbols of Physical Resource Block, and each road reference signal is mapped on 4 subcarriers on the OFDM symbol specifically comprises: a plurality of reference signals among the first via reference signal R51 are mapped to following frequent position: the 0th subcarrier of the 4th OFDM symbol, the 6th subcarrier; The 2nd subcarrier of the 7th OFDM symbol, the 8th subcarrier; The 0th subcarrier of the 10th OFDM symbol, the 6th subcarrier; A plurality of reference signals among the second tunnel reference signal R52 are mapped to following time-frequency position: the 3rd subcarrier of the 4th OFDM symbol, the 9th subcarrier; The 5th subcarrier of the 7th OFDM symbol, the 11st subcarrier; The 3rd subcarrier of the 10th OFDM symbol, the 9th subcarrier.With on the basis that does not increase system resource overhead, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPPLTE 36 system communication agreements is mapped in the Resource Block, reach the purpose of supported bilayer data beam figuration transmission, thereby realize reducing the purpose of system resource overhead.
Preferably, as shown in Figure 5, long evolving system adopts extended cyclic prefix, Physical Resource Block comprises 12 OFDM symbols in time domain, the two-way reference signal is mapped on 3 OFDM symbols of Physical Resource Block, and each road reference signal is mapped on 6 subcarriers on the OFDM symbol specifically comprises: a plurality of reference signals among the first via reference signal R51 are mapped to following frequent position: the 0th subcarrier of the 4th OFDM symbol, the 6th subcarrier; The 2nd subcarrier of the 7th OFDM symbol, the 8th subcarrier; The 3rd subcarrier of the 10th OFDM symbol, the 9th subcarrier; A plurality of reference signals among the second tunnel reference signal R52 are mapped to following time-frequency position: the 3rd subcarrier of the 4th OFDM symbol, the 9th subcarrier; The 5th subcarrier of the 7th OFDM symbol, the 11st subcarrier; The 0th subcarrier of the 10th OFDM symbol, the 6th subcarrier.With on the basis that does not increase system resource overhead, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPPLTE 36 system communication agreements is mapped in the Resource Block, reach the purpose of supported bilayer data beam figuration transmission, thereby realize reducing the purpose of system resource overhead.
In the above-described embodiments, the two-way reference signal is different pseudo noise code.
Downstream station DRS (Dedicated Reference Signal) mapping method can be when channel circumstance be better in the LTE system of present embodiment, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPP LTE 36 system communication agreements is mapped in the Resource Block, reach the purpose of supported bilayer data beam figuration transmission, thereby realize reducing the purpose of system resource overhead.
Fig. 6 is the block diagram according to downstream station DRS (Dedicated Reference Signal) mapping device in the LTE system of second embodiment of the invention.As shown in Figure 6, comprise according to downstream station DRS (Dedicated Reference Signal) mapping device in the LTE system of second embodiment of the invention: detection module 602 is used to detect the channel circumstance parameter; Comparison module 604 is used for channel circumstance parameter and the parameter that sets in advance are compared; Mapping block 606, be used for according to comparative result with one the road or the two-way reference signal be mapped to a Physical Resource Block of long evolving system.
Descending UE DRS (Dedicated Reference Signal) mapping method detects channel circumstance by utilizing detection module in the LTE system according to second embodiment of the invention, and utilize mapping block according to comparative result select with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system, thereby can be when channel circumstance be better, the two-way reference signal is mapped on the Physical Resource Block of long evolving system, reaches the technique effect that reduces system resource overhead.
Preferably, the channel circumstance parameter is the signal to noise ratio or the error rate.
Downstream station DRS (Dedicated Reference Signal) mapping device can be when channel circumstance be better in the LTE system of present embodiment, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPP LTE 36 system communication agreements is mapped in the Resource Block, reach the purpose of supported bilayer data beam figuration transmission, thereby realize reducing the purpose of system resource overhead.
As mentioned above, by means of above-mentioned at least one technical scheme of the present invention, can when channel circumstance is better, the two-way UE DRS (Dedicated Reference Signal) that defines in the 3GPP LTE 36 system communication agreements be mapped in the Resource Block, thereby reach the technique effect that reduces system resource overhead.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. downstream station DRS (Dedicated Reference Signal) mapping method in the long evolving system is characterized in that, comprising:
Detect the channel circumstance parameter;
Described channel circumstance parameter and the parameter that sets in advance are compared;
According to comparative result with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system.
2. method according to claim 1 is characterized in that, described channel circumstance parameter is an order, according to comparative result with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system and specifically comprise:
If the order of detected channel greater than the order that sets in advance, then is mapped to the two-way reference signal on the Physical Resource Block of long evolving system;
If the order of detected channel less than the order value that sets in advance, then is mapped to one tunnel reference signal on the Physical Resource Block of long evolving system.
3. method according to claim 1 is characterized in that, described channel circumstance parameter is a signal to noise ratio, according to comparative result with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system and specifically comprise:
If detected signal to noise ratio greater than the signal to noise ratio that sets in advance, then is mapped to the two-way reference signal on the Physical Resource Block of long evolving system;
If detected signal to noise ratio less than the signal to noise ratio that sets in advance, then is mapped to one tunnel reference signal respectively on the Physical Resource Block of long evolving system.
4. method according to claim 1 is characterized in that, described channel circumstance parameter is the error rate, according to comparative result with one the road or the two-way reference signal be mapped on the Physical Resource Block of long evolving system and specifically comprise:
If the detected error rate greater than the error rate that sets in advance, then is mapped to one tunnel reference signal respectively on the Physical Resource Block of long evolving system;
If the detected error rate less than the error rate that sets in advance, then is mapped to the two-way reference signal on the Physical Resource Block of long evolving system.
5. method according to claim 1, it is characterized in that, described Physical Resource Block comprises 12 subcarriers on frequency domain, the described reference signal in every road includes a plurality of reference signals, the two-way reference signal is mapped on the Physical Resource Block of long evolving system specifically to comprise:
The described reference signal of two-way is mapped on N the orthogonal frequency division multiplex OFDM symbol of described Physical Resource Block, wherein, the value of N is one of following: 3,4;
The described reference signal in each road is mapped on M the subcarrier on the described OFDM symbol, and wherein, the value of M is one of following: 3,4,6.
6. method according to claim 5, it is characterized in that, described long evolving system adopts normal cyclic prefix, described Physical Resource Block comprises 14 OFDM symbols in time domain, described two-way reference signal is mapped on 4 OFDM symbols of described Physical Resource Block, and the described reference signal in each road is mapped on 3 subcarriers on the described OFDM symbol specifically comprises:
A plurality of reference signals in the described reference signal of the first via are mapped to following time-frequency position: the 0th subcarrier of the 3rd OFDM symbol, the 4th subcarrier, the 8th subcarrier; The 0th subcarrier of the 9th OFDM symbol, the 4th subcarrier, the 8th subcarrier;
A plurality of reference signals in the second tunnel described reference signal are mapped to following time-frequency position: the 2nd subcarrier of the 6th OFDM symbol, the 6th subcarrier, the 10th subcarrier; The 2nd subcarrier of the 12nd OFDM symbol, the 6th subcarrier, the 10th subcarrier.
7. method according to claim 5, it is characterized in that, described long evolving system adopts normal cyclic prefix, described Physical Resource Block comprises 14 OFDM symbols in time domain, described two-way reference signal is mapped on 4 OFDM symbols of described Physical Resource Block, and the described reference signal in each road is mapped on 6 subcarriers on the described OFDM symbol specifically comprises:
A plurality of reference signals in the described reference signal of the first via are mapped to following time-frequency position: the 0th subcarrier of the 3rd OFDM symbol, the 8th subcarrier; The 2nd subcarrier of the 6th OFDM symbol, the 10th subcarrier; The 4th subcarrier of the 9th OFDM symbol; The 6th subcarrier of the 12nd OFDM symbol;
A plurality of reference signals in the second tunnel described reference signal are mapped to following time-frequency position: the 4th subcarrier of the 3rd OFDM symbol; The 6th subcarrier of the 6th OFDM symbol; The 0th subcarrier of the 9th OFDM symbol, the 8th subcarrier; The 2nd subcarrier of the 12nd OFDM symbol, the 10th subcarrier.
8. method according to claim 5, it is characterized in that, described long evolving system adopts extended cyclic prefix, described Physical Resource Block comprises 12 OFDM symbols in time domain, described two-way reference signal is mapped on 3 OFDM symbols of described Physical Resource Block, and the described reference signal in each road is mapped on 4 subcarriers on the described OFDM symbol specifically comprises:
A plurality of reference signals in the described reference signal of the first via are mapped to following frequent position: the 0th subcarrier of the 4th OFDM symbol, the 6th subcarrier; The 2nd subcarrier of the 7th OFDM symbol, the 8th subcarrier; The 0th subcarrier of the 10th OFDM symbol, the 6th subcarrier;
A plurality of reference signals in the second tunnel described reference signal are mapped to following time-frequency position: the 3rd subcarrier of the 4th OFDM symbol, the 9th subcarrier; The 5th subcarrier of the 7th OFDM symbol, the 11st subcarrier; The 3rd subcarrier of the 10th OFDM symbol, the 9th subcarrier.
9. method according to claim 5, it is characterized in that, described long evolving system adopts extended cyclic prefix, described Physical Resource Block comprises 12 OFDM symbols in time domain, described two-way reference signal is mapped on 3 OFDM symbols of described Physical Resource Block, and the described reference signal in each road is mapped on 6 subcarriers on the described OFDM symbol specifically comprises:
A plurality of reference signals in the described reference signal of the first via are mapped to following frequent position: the 0th subcarrier of the 4th OFDM symbol, the 6th subcarrier; The 2nd subcarrier of the 7th OFDM symbol, the 8th subcarrier; The 3rd subcarrier of the 10th OFDM symbol, the 9th subcarrier;
A plurality of reference signals in the second tunnel described reference signal are mapped to following time-frequency position: the 3rd subcarrier of the 4th OFDM symbol, the 9th subcarrier; The 5th subcarrier of the 7th OFDM symbol, the 11st subcarrier; The 0th subcarrier of the 10th OFDM symbol, the 6th subcarrier.
10. downstream station DRS (Dedicated Reference Signal) mapping device in the long evolving system is characterized in that, comprising:
Detection module is used to detect the channel circumstance parameter;
Comparison module is used for described channel circumstance parameter and the parameter that sets in advance are compared;
Mapping block, be used for according to comparative result with one the road or the two-way reference signal be mapped to a Physical Resource Block of long evolving system.
11. device according to claim 10 is characterized in that, described channel circumstance parameter is order or the signal to noise ratio or the error rate.
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| WO2020029896A1 (en) * | 2018-08-10 | 2020-02-13 | 华为技术有限公司 | Reference signal sending and receiving method and apparatus |
| CN111628837A (en) * | 2019-02-27 | 2020-09-04 | ***通信有限公司研究院 | Channel modeling method and device |
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| CN101374036A (en) * | 2007-08-23 | 2009-02-25 | 中兴通讯股份有限公司 | Transmission diversity method and system for multi-input multi-output OFDM system |
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| CN101374036A (en) * | 2007-08-23 | 2009-02-25 | 中兴通讯股份有限公司 | Transmission diversity method and system for multi-input multi-output OFDM system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020029896A1 (en) * | 2018-08-10 | 2020-02-13 | 华为技术有限公司 | Reference signal sending and receiving method and apparatus |
| US11582081B2 (en) | 2018-08-10 | 2023-02-14 | Huawei Technologies Co., Ltd. | Reference signal sending method, reference signal receiving method, and apparatus |
| CN111628837A (en) * | 2019-02-27 | 2020-09-04 | ***通信有限公司研究院 | Channel modeling method and device |
| CN111628837B (en) * | 2019-02-27 | 2022-05-13 | ***通信有限公司研究院 | Channel modeling method and device |
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Effective date of registration: 20171107 Address after: 075000, No. 168, North Ring Road, four street, Weizhou Town, Zhangjiakou, Hebei, Weixian County Patentee after: Lu Guize Address before: 518057 Nanshan District science and technology, Guangdong Province, South Road, No. 55, No. Patentee before: ZTE Corporation |
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