[YU, Yang, WANG, Wei, ZHANG, Haitao, LIU, Jianfeng, ZHUANG, Guoqiang, ZHANG, Jianfeng, PENG, Kuncheng, LU, Shengwen, CAO, Gang, LI, Xiao] Huawei Hangzhou Manufacturing Base, 310 Liuhe Road, Zhijiang Hi-Tech Park, Hangzhou Hi-Tech Industry Development Zone Hangzhou, Zhejiang 310053;Huawei Hangzhou Manufacture Base Ease of Liuhe Road, Zhijiang Science Park Hangzhou Hi-Tech Industry Park Hangzhou Zhejiang 310005;Huawei Hangzhou Manufacture Base Ease of Liuhe Road, Zhijiang Science Park Hangzhou Hi-Tech Industry Park Hangzhou Zhejiang 310005;Huawei Hangzhou Manufacture Base Ease of Liuhe Road, Zhijiang Science Park Hangzhou Hi-Tech Industry Park Hangzhou Zhejiang 310005;Huawei Hangzhou Manufacture Base Ease of Liuhe Road, Zhijiang Science Park Hangzhou Hi-Tech Industry Park Hangzhou Zhejiang 310005;Huawei Hangzhou Manufacture Base Ease of Liuhe Road, Zhijiang Science Park Hangzhou Hi-Tech Industry Park Hangzhou Zhejiang 310005;Huawei Hangzhou Manufacture Base Ease of Liuhe Road, Zhijiang Science Park Hangzhou Hi-Tech Industry Park Hangzhou Zhejiang 310005;Huawei Hangzhou Manufacture Base Ease of Liuhe Road, Zhijiang Science Park Hangzhou Hi-Tech Industry Park Hangzhou Zhejiang 310005;Huawei Hangzhou Manufacture Base Ease of Liuhe Road, Zhijiang Science Park Hangzhou Hi-Tech Industry Park Hangzhou Zhejiang 310005;Huawei Hangzhou Manufacture Base Ease of Liuhe Road, Zhijiang Science Park Hangzhou Hi-Tech Industry Park Hangzhou Zhejiang 310005;Huawei Hangzhou Manufacture Base Ease of Liuhe Road, Zhijiang Science Park Hangzhou Hi-Tech Industry Park Hangzhou Zhejiang 310005 A method of virtual local area network exchange includes the steps of: receiving the data frame, obtaining the information related to the exchange according to the data frame, querying the corresponding relations between the information related to the exchange and the VLAN information configured in the network device, thereby to obtain the new VLAN information, and updating the data frame according to the new VLAN information; forwarding the updated data frame. Wherein, the information related to the exchange comprises VPNID, VPNID and egress physical ports, public network VLAN information, the identification information of the data frame the identification of the exchange field, the identification of the exchange field and the destination MAC address. The invention also discloses the corresponding network devices.

[Wenbing Ling, Chunqing Hu, Xue Zhang, Chunyue Xu, Jingjing Wang, Luan Qin, Huanlong Wu, Xuxiang He, Sha Li, Jijian Zhang, Nanfei Chen, Jinmei Feng, Qinhong Chen, Binglei Niu, Yang Guo, Weirui Liu, Linjun Yu, Zhaigu Fu, Zhaoyang Wu, Jiaying Tan, Junyi Zhou, Huihui Wang, Jianming Guan, Jianfeng Lin, Qingfeng Zhang, Xusheng Chen, Min Zhang, Ningning Han, Jiahua Liu, Kangquan Xu, Qingqing Cai] CN Guangdong

[ZHANG, Zaixuan, LI, Chenxia, WANG, Jianfeng, YU, Xiangdong, ZHANG, Wensheng, ZHANG, Wenping, NIU, Xiaohui] Road Xiashagaojiaoyuanqu Xueyuan, Jianggan Hangzhou, Zhejiang 310018;Road Xiashagaojiaoyuanqu Xueyuan, Jianggan Hangzhou, Zhejiang 310018;Road Xiashagaojiaoyuanqu Xueyuan, Jianggan Hangzhou, Zhejiang 310018;Road Xiashagaojiaoyuanqu Xueyuan, Jianggan Hangzhou, Zhejiang 310018;Road Xiashagaojiaoyuanqu Xueyuan, Jianggan Hangzhou, Zhejiang 310018;Road Xiashagaojiaoyuanqu Xueyuan, Jianggan Hangzhou, Zhejiang 310018;Road Xiashagaojiaoyuanqu Xueyuan, Jianggan Hangzhou, Zhejiang 310018;Road Xiashagaojiaoyuanqu Xueyuan, Jianggan Hangzhou, Zhejiang 310018 A dispersion and loss spectrum self-calibration distributed optical fiber Raman temperature sensor has a dual Raman displacement wavelength dual fiber pulsed laser module consisting of a drive power supply (11), an electronic switch (12), a primary laser (13) and a secondary laser (14), a first combiner (15), a bidirectional coupler (16), a multimode fiber (17), an integrated optical fiber wavelength division multiplexer (18), a second combiner (19), a direct detection system (20), a signal collection and processing system (21) and a display (22). The sensor uses two light sources that have two Raman wavelength shift, wherein the optical fiber backward anti-Stokes Raman scattering peak centre wavelength of the primary light source and the optical fiber backward Stokes scattering peak centre wavelength of the secondary light source are coincided, and the time domain reflection signal of the one-way optical fiber Rayleigh scattering is deducted. Based on the optical fiber Raman scattering temperature-measurement principle, the dispersion and loss spectrum self-calibration method and the optical time domain reflection principle, the optical fiber dispersion and the loss spectrum can be self-calibrated, and the random loss of the temperature-measurement optical fiber and the optical cable used on site caused by bending and pressed stretching can also be self-calibrated.

[Jianfeng Lin, Sha Li, Nanfei Chen, Jijian Zhang, Qingfeng Zhang, Xusheng Chen, Min Zhang] CN Zhuhai

[Zaixuan Zhang, Chenxia Li, Jianfeng Wang, Xiangdong Yu, Wensheng Zhang, Wenping Zhang, Xiaohui Niu] CN Zhejiang A dispersion and loss spectrum auto-correction distributed optical fiber Raman temperature sensor has a dual fiber pulsed laser module with dual Raman wavelength shifts. The laser module is composed of a power supply (11), an electronic switch (12), a primary laser (13) and a secondary laser (14), a first combiner (15), a bidirectional coupler (16), a multimode fiber (17), an integrated optical fiber wavelength division multiplexer (18), a second combiner (19), a direct detection system (20), a signal collection and processing system (21) and a display (22). The sensor uses two light sources that have two Raman wavelength shifts, wherein the central wavelength of backward anti-Stokes Raman scattering peak of the primary light source coincides with that of the backward Stokes scattering peak center wavelength of the secondary light source, and the time domain reflection signal of the one-way optical fiber Rayleigh scattering is deducted. Based on the optical fiber Raman scattering temperature measurement principle, the dispersion and loss spectrum auto-correction method and the optical time domain reflection principle, the optical fiber dispersion and the loss spectrum can be self-corrected, and the random power loss caused by bending and stretching in installation can also be auto-corrected.

[ZHANG, Zaixuan, KANG, Juan, ZHANG, Wenping, LI, Chenxia, YU, Xiangdong, WANG, Jianfeng, ZHANG, Wensheng, JIN, Shangzhong] No. 258, Xueyuan Street, Xiasha Higher Education Zone Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018 A fully distributed optical fiber sensor for an optical fiber Raman frequency shifter for fused Raman amplification effect. A laser light emitted by a 1550 nm optical fiber pulsed laser device (10) is split into two light beams via an optical fiber splitter (11). One light beam is converted into a broad spectrum Stokes Raman light via the optical fiber Raman frequency shifter, while the other light beam, after passing through a delay optical fiber (14), is passed through an optical fiber combiner (15) in conjunction with the broad-band Stokes Raman light to enter a same thread of sensor optical fiber (17); the two light beams, at the point where same meet in the sensor optical fiber (17), are fused together via non-linear mutual interaction and yield a Raman-amplified 1660 nm broad spectrum reverse Rayleigh scattered light. The 1550 nm broad spectrum anti-Stokes Raman light having temperature information and generated in the sensor optical fiber (17) is passed through a narrowband reflection filter (18) and, after a Rayleigh scattering of the 1550 nm laser light is deducted, is entered in conjunction with a 1660 nm Rayleigh scattered light having strain information into an electronic receiver module (19), a digital signal processor (20), and an industrial personal computer (21). The temperature and strain information on the sensor optical fiber (17) are acquired after demodulation. The optical fiber sensor is applicable in monitoring petrochemical pipelines, tunnels, and large-scale civil engineering projects within a range of 60 kilometers and in disaster prediction monitoring.

[Zaixuan Zhang, Chenxia Li, Jianfeng Wang, Xiangdong Yu, Wensheng Zhang, Wenping Zhang, Xiaohui Niu] CN Zhejiang A dispersion and loss spectrum auto-correction distributed optical fiber Raman temperature sensor has a dual fiber pulsed laser module with dual Raman wavelength shifts. The laser module is composed of a power supply (11), an electronic switch (12), a primary laser (13) and a secondary laser (14), a first combiner (15), a bidirectional coupler (16), a multimode fiber (17), an integrated optical fiber wavelength division multiplexer (18), a second combiner (19), a direct detection system (20), a signal collection and processing system (21) and a display (22). The sensor uses two light sources that have two Raman wavelength shifts, wherein the central wavelength of backward anti-Stokes Raman scattering peak of the primary light source coincides with that of the backward Stokes scattering peak centre wavelength of the secondary light source, and the time domain reflection signal of the one-way optical fiber Rayleigh scattering is deducted. Based on the optical fiber Raman scattering temperature measurement principle, the dispersion and loss spectrum auto-correction method and the optical time domain reflection principle, the optical fiber dispersion and the loss spectrum can be self-corrected, and the random power loss caused by bending and stretching in installation can also be auto-corrected.

[MA, Hongfei, GUO, Qingwei, ZHANG, Haibo, ZHANG, Bo, XU, Lijing, ZHANG, Qing, XU, Jianfeng, LI, Wei, DU, Zhengzhong, HU, Chen, YANG, Yi, MIAO, Lei, QI, Fengyan] Huawei Administration Building Bantian, Longgang District Shenzhen, Guangdong 518129;No. 2, South Taibai Road Xi'an, Shaanxi 710071;P.O.Box 119, Xidian University 2 Tai Bai Nan Road Xi'an, Shaanxi 710071;P.O.Box 119, Xidian University 2 Tai Bai Nan Road Xi'an, Shaanxi 710071;P.O.Box 119, Xidian University 2 Tai Bai Nan Road Xi'an, Shaanxi 710071;P.O.Box 119, Xidian University 2 Tai Bai Nan Road Xi'an, Shaanxi 710071;Huawei Administration Building Bantian, Longgang District Shenzhen, Guangdong 518129;Huawei Administration Building Bantian, Longgang District Shenzhen, Guangdong 518129;Huawei Administration Building Bantian, Longgang District Shenzhen, Guangdong 518129;Huawei Administration Building Bantian, Longgang District Shenzhen, Guangdong 518129;Huawei Administration Building Bantian, Longgang District Shenzhen, Guangdong 518129;Huawei Administration Building Bantian, Longgang District Shenzhen, Guangdong 518129;Huawei Administration Building Bantian, Longgang District Shenzhen, Guangdong 518129;Huawei Administration Building Bantian, Longgang District Shenzhen, Guangdong 518129;Huawei Administration Building Bantian, Longgang District Shenzhen, Guangdong 518129 A method for high frequency band replication, which comprises: to filter the audio or voice signal to gain the low frequency sub-band and the high frequency sub-band; to determine the strategy of spectral band replication; to gain the correlation between said low frequency sub-band and high frequency sub-band according to said determined strategy of spectral band replication, and to select the low frequency sub-band as the replication frequency band for the high frequency sub-band according to said correlation, and to output the information of high frequency band replication parameters which includes the correspondence relation of the selected frequency band. The present invention else provides a method for high frequency band replication, which comprises: to receive the information of high frequency band replication parameters which includes the correspondence relation of the selected frequency band, and said correspondence relation of the selected frequency band is the relation between the high frequency sub-band and the corresponding low frequency sub-band thereof, which is determined by the correlation; In the high band, to replicate the high frequency sub-band by the low frequency sub-band according to said information of high frequency band replication parameters which includes the correspondence relation of the selected frequency band. Accordingly, the present invention provides a coder and decoder. The solution of the embodiment of the present invention can fulfill the high frequency replication more exactly.

[ZHANG, Zaixuan, KANG, Juan, ZHANG, Wenping, LI, Chenxia, YU, Xiangdong, WANG, Jianfeng, ZHANG, Wensheng, JIN, Shangzhong] No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018;No. 258, Xueyuan Street, Xiasha Higher Education Zone, Jianggan District Hangzhou, Zhejiang 310018 A fused optical fiber Raman frequency shifter and a fully distributed optical fiber sensor for a Raman amplifier. A laser light emitted by an optical fiber pulsed laser device (11) is frequency-shifted by 13.2 THz via the optical fiber Raman frequency shifter to generate a 1660 nm wave band broad spectrum Raman laser light that serves as a broad spectrum light source for the fully distributed fiber optical sensor and is emitted into a sensor optical fiber (17). Deformation and breakage of an optical fiber are detected by utilizing the principle that the reverse Rayleigh scattered light intensity of the sensor optical fiber (17) is modulated by optical fiber strain. An anti-Stokes Raman scattered light of 1550 nm wave frequency generated in the sensor optical fiber (17) is amplified via the optical fiber Raman amplifier. By deducting the effect of strain from the intensity ratio between the anti-Stokes Raman scattered light and the Rayleigh scattered light, temperature information of each optical fiber section is acquired, thus allowing detections of strain and temperature to be free of cross effects. The fully distributed optical fiber sensor utilizes optical time-domain reflectometry to position a detection point on the sensor optical fiber, is applicable in monitoring petrochemical pipelines, tunnels, large-scale civil engineering projects that are of an ultra-long range of within 100 kilometers and in disaster prediction monitoring.

[Dejun ZHANG, Lei MIAO, Jianfeng XU, Fengyan QI, Qing ZHANG, Lixiong LI, Fuwei MA, Yang Gao] CN Beijing The present disclosure relates to a method, apparatus, and system for encoding and decoding signals. The encoding method includes: converting a first-domain signal into a second-domain signal; performing Linear Prediction (LP) processing and Long-Term Prediction (LTP) processing for the second-domain signal; obtaining a long-term flag according to decision criteria; obtaining a second-domain contribution signal according to the LP processing result and the LTP processing result when the long-term flag is a first flag; obtaining a second-domain contribution signal according to the LP processing result when the long-term flag is a second flag; converting the second-domain contribution signal into a first-domain contribution signal, and calculating a first-domain predictive residual signal; and outputting a bit stream that includes the first-domain predictive residual signal. With the present disclosure, a subsequent encoding or decoding process is performed adaptively according to the long-term flag; when the long-term flag is the second flag, it is not necessary to consider the LTP processing result, thus improving the compression performance of a codec.