A method for energy saving of broadband access network
A technology of broadband access network and total bandwidth, which is applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problems of OFDM-PON with small bandwidth granularity and multiple carriers, unable to achieve energy saving effect, low energy consumption, etc., to achieve The effect of reducing energy consumption
Active Publication Date: 2016-08-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0010] However, none of the above algorithms can well adapt to the characteristics of OFDM-PON, such as small bandwidth granularity and multiple carriers, and more importantly, they cannot achieve a certain energy-saving effect. It is imperative to implement a green bandwidth allocation algorithm that is equipped with an OFDM-PON system and can meet the requirements of multi-service access quality of service (QoS, Quality of Service)
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[0044] figure 1 It is an example diagram of OFDM-PON broadband access network. Such as figure 1 As shown, the OFDM-PON broadband access network is in the downlink transmission direction (from the OLT to the ONU direction), and the OLT modulates all downlink data on an OFDM optical carrier, and after reaching the ODN, the downlink data is transmitted through a passive optical splitter (Splitter). The signal is copied and sent to each ONU. At this time, the OFDM-PON system is a broadcast network sharing physical media within the range from OLT to ODN, which saves a lot of fiber laying costs compared with point-to-point optical topology networks. In the uplink transmission direction (from ONU to OLT), OFDMA technology divides the uplink bandwidth resource into a time slot / subcarrier two-dimensional multiplexing resource mode, and each ONU is dynamically assigned by OLT or statically designated subcarrier / time slot. The OLT sends the user's data frame. Due to the directional p...
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The invention discloses an energy-saving method for a broadband access network. An optical line terminal OLT receives a report frame sent by each optical network unit ONU, and judges that the ONU is in deep sleep according to the downlink buffer size and the bandwidth request value of each priority service in the report frame. mode or normal sleep mode. For ONUs in normal sleep mode, allocate uplink bandwidth for each priority service and set uplink / downlink data parameters; OLT arranges in descending order according to the uplink bandwidth allocation value of each ONU, generates and sends authorization frames for each ONU, and then sends downlink data. The ONU in normal sleep mode starts to send uplink data and new reporting frame after receiving the GATE frame, and then receives downlink data according to the start receiving time of downlink data; the ONU in deep sleep mode only sends uplink data and receives downlink data, and does not send new data. Each ONU sets the sleep wake-up time according to the sleep mode. The present invention realizes energy saving by reducing unnecessary working time of ONU transmitter and receiver.
Description
technical field [0001] The invention belongs to the technical field of broadband access networks, and more specifically relates to an energy-saving method for broadband access networks. Background technique [0002] The OFDM-PON technology that combines OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) and PON (Passive Optical Network, Passive Optical Network) is the mainstream technology of the next generation optical network. OFDM-PON is located between the service network interface (Service Network Interface, SNI) and the user network interface (User Network Interface, UNI), which is mainly composed of three parts: optical line terminal (Optical Line Terminal, OLT), optical network unit (Optical NetworkUnit, ONU) and optical distribution network (Optical Distribution Network, ODN). For OFDM-PON networks, some domestic and foreign research institutions have done a lot of work, such as NEC company Wei W and others first proposed ...
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IPC IPC(8): H04L12/24H04L12/911
Inventor 张崇富肖能武江宁
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA