WO2011131068A2

WO2011131068A2 - Method and system for realizing energy saving in wireless network

Info

Publication number: WO2011131068A2
Application number: PCT/CN2011/071970
Authority: WO
Inventors: 和峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-04-20
Filing date: 2011-03-18
Publication date: 2011-10-27
Also published as: CN102238591B; CN102238591A; WO2011131068A3

Abstract

A method and system Tor realizing energy saving in a wireless network are provided in the present invention. A base station reports its energy consumption information to a decision network element. The decision network element determines, according to the reported energy consumption information, the status of the cell under the domination of the base station, wherein the energy consumption information may include one or multiple of the followings: electric power consumption, ambient environment temperature, etc. With the method of the present invention, operation providers can exactly know the energy consumption status in the wireless network, and thus reasonably determine which base stations or cells should be turned into the energy saving status at proper time, so that the best energy saving status is achieved finally, in addition, the operation providers also acquire the operation status of each base station in time, so that the flexible adjustment of network parameters configuration is achieved and the device performance is optimized.

Description

Method and system for implementing energy saving in wireless network

The present invention relates to wireless communication technologies, and in particular, to a method and system for implementing energy saving in a wireless network. Background technique

With the development of wireless communication technology, more and more advanced technologies have greatly improved the performance of wireless communication, and at the same time, various communication operators are constantly increasing their network coverage and network capacity in order to meet the increasing demands of users. However, with the fierce competition and the green economy that the world is paying more attention to, it has brought great challenges to operators' operational capabilities. The telecommunications industry has gradually entered a stage of meager profit. On the one hand, operators must constantly build stations to improve their network performance, such as network coverage and network capacity, in order to expand market share and business category, while the other side must strictly control operating expenses to increase profits. Among them, a certain proportion of the operator's operating expenses is from the energy consumption of the wireless network, and the base station as the energy consumption of the operator is the key to energy conservation. Therefore, how to reduce energy consumption is a problem that operators need to solve for their own profit. Moreover, the energy saving of wireless networks also responds to the current global call for energy conservation and emission reduction.

Currently, the two wireless networks of the 3rd Generation Partnership Project (3GPP, 3GPP) are the networks of the Universal Mobile Telecommunications System (UMTS) and the Long Term Evolution (LTE) system. Development and expansion stage.

FIG. 1 is a schematic diagram of an existing LTE network architecture, as shown in FIG. 1 , which is composed of an Evolved Universal Terrestrial Radio Access Network ( E-UTRAN) Evolved Packet Core ( EPC). The network is flattened. The E-UTRAN is connected to the EPC through the SI interface. Wherein, the E-UTRAN is connected by a plurality of An evolved base station (eNB, Evolved NodeB) is configured, and each eNB is connected through an X2 interface; the EPC is composed of a Mobility Management Entity (MME) and a Serving Gateway (S-GW).

2 is a schematic structural diagram of a UMTS. As shown in FIG. 2, the UMTS is composed of a core network (CN, Core Network) and a Universal Terrestrial Radio Access Network (UTRAN), wherein the UTRAN is configured by a radio network controller. (RNC, Radio Network Controller) and base station Node B (or called Node B), the two are connected through the lub port. The RNCs can be interconnected through the Iur port, and the RNC is connected to the core network through the Iu port.

In the above network, the number of access network devices is very large. Therefore, the energy consumption of the access network accounts for most of the energy saving requirements of the entire network. In order to achieve energy saving of the base station, it is mainly to adopt new energy-saving and environmental protection devices and improve the heat dissipation materials to reduce the power consumption of the base station and reduce the power consumption caused by heat dissipation. However, this method has the following problems: The use of such devices increases the manufacturing cost of the base station, and a large number of base stations that do not use such devices fail to achieve energy saving. Therefore, the current energy saving is mostly achieved by cell on/off.

In order to adapt to the rapid discovery of wireless communication technologies, there may be only a UTRAN network or only an E-UTRAN network in a certain local area, but it is also possible that multiple system networks exist simultaneously, that is, an Inter-RAT scenario. The wireless networks in both UMTS and LTE systems use a timely on/off cell to save power. For example, in a UMTS system, the RNC can notify a certain Node B through a Cell Configuration Request message. Entering or leaving the sleep mode (Enter/leave Dormant Mode) to activate/deactivate the power-saving mode; in the LTE system, one or some cells under the evolved base station eNB can actively enter the power-saving mode. It is also possible to wake up another eNB (or a cell under its jurisdiction) that has entered the power saving mode in order to reduce the network load.

The current decision to determine the entry/exit energy-saving status of a cell under a certain base station or base station is mainly based on the load information of the cell, that is, when the load of a certain base station (or cell) is lower than the preset width. When the value is, the base station (or a certain cell under the jurisdiction) can actively enter or be required to enter the energy-saving state. In the LTE system, load information of a neighboring base station or a cell can be obtained through a Resource Status Report. However, the load status cannot be directly used to measure energy consumption, because energy consumption is also related to many other factors, such as the state of the base station, the cooling equipment (such as air conditioning) related to the base station, and therefore, the existing community is turned on/off. In the way of achieving energy saving, the energy consumption status of the wireless network cannot be accurately grasped, so that it is impossible to reasonably determine which base stations or cells enter the energy-saving state in a timely manner, and finally the optimal state of energy saving cannot be achieved. Summary of the invention

In view of this, the main purpose of the present invention is to provide a method and system for implementing energy saving in a wireless network, which can accurately grasp the energy consumption status of the wireless network, thereby reasonably determining which base stations or cells enter the energy-saving state in a timely manner, and finally achieve the most energy-saving state. Good state.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A method for implementing energy saving in a wireless network, including:

The base station reports its own energy consumption information to the decision network element;

The decision network element determines the cell status under the jurisdiction of the base station according to the reported energy consumption information.

The energy consumption information includes one or more of the following: power consumption, ambient temperature. The energy consumption information further includes one of a number of radio frequency units of the cell under the control of the base station or the base station, one of the number of power amplifiers in the radio frequency module, and the number of antennas.

The decision network element maintains OAM for operation management; or

For a global terrestrial radio access network UTRAN network of a universal mobile communication system UMTS system, the decision network element is an RNC; or

For the evolution of the Long Term Evolution LTE system, the global terrestrial radio access network E-UTRAN network, the decision network element is a neighboring base station.

The method also includes:

The base station also reports radio resource status information of the cell; The determining network element determines a cell status under the jurisdiction of the base station according to the obtained radio resource status information and the energy consumption information.

The method for reporting is: the base station actively initiates, or the decision network element initiates by requesting reporting by the base station.

The reported message is an existing message or a newly added message;

The existing message is: an audit response message in UTRAN, or a resource status response message in E-UTRAN, or a direct transfer message between systems.

Determining a decision policy in the decision network element; determining the cell status under the jurisdiction of the base station includes:

And determining, according to the obtained energy consumption information, or the obtained energy consumption information and the wireless resource state information of the cell, the decision to determine whether the cell enters or leaves the energy saving state.

The determining whether the cell enters or leaves the power saving state is: the cell is turned off/on, or the transmit power is decreased/increased, or the carrier frequency is turned off/on, or the number of radio antennas is reduced/increased.

A system for implementing energy saving in a wireless network, comprising at least a base station and a decision network element, where the base station is configured to report its own energy consumption information to the decision network element;

The determining network element is configured to determine, according to the reported energy consumption information, a cell status under the jurisdiction of the base station. The decision network element is further configured to send a request for reporting energy consumption information to the base station.

For a network scenario where multiple systems are deployed at the same time, the decision network element is a decision network element in the network where it is located or in other networks.

The decision network element is OAM; or

For the UTRAN network of the UMTS system, the decision network element is an RNC; or, for the E-UTRAN network of the LTE system, the decision network element is a neighboring base station.

The base station is further configured to report radio resource status information of the cell.

The determining network element is specifically configured to determine, according to the obtained radio resource status information and the energy consumption information, a cell status under the jurisdiction of the base station.

The energy consumption information includes one or more of the following: power consumption, ambient temperature. The energy consumption information further includes one of the number of radio frequency units of the cell under the jurisdiction of the base station or the base station, the number of power amplifiers in the radio frequency module, and the number of antennas.

It can be seen from the technical solution provided by the foregoing that the base station reports its own energy consumption information to the decision network element, and the decision network element determines the cell status under the jurisdiction of the base station according to the reported energy consumption information, where the energy consumption information may include the following Kind or more: power consumption, ambient temperature, etc. Through the method of the invention, the operator accurately grasps the energy consumption status of the wireless network, thereby reasonably determining which base stations or cells enter the energy-saving state in a timely manner, and finally achieves the optimal state of energy saving. In addition, the operator also obtains the running status of each base station in time, thereby realizing flexible adjustment of network parameter configuration, thereby optimizing device performance. DRAWINGS

FIG. 1 is a schematic diagram of an existing LTE network architecture;

2 is a schematic structural diagram of a conventional UMTS;

3 is a flowchart of a method for implementing energy saving in a wireless network according to the present invention;

4 is a schematic structural diagram of a system for implementing energy saving in a wireless network according to the present invention;

FIG. 5 is a schematic diagram of network coverage in an embodiment of the present invention. detailed description

FIG. 3 is a flowchart of a method for implementing energy saving in a wireless network according to the present invention. As shown in FIG. 3, the method includes: Step 300: A base station reports its own energy consumption information to a decision network element.

The decision network element can be OAM (Operation Administration Maintenance). In particular, for the UTRAN network of the UMTS system, the decision network element may also be an RNC; for the E-UTRAN network of the LTE system, the decision network element may also be a neighboring base station; for a network scenario where multiple systems are deployed simultaneously, that is, at some When a local area is deployed in multiple networks such as UMTS and LTE, the decision network element is a decision network element in its own network or in other networks. For example, it may be an RNC in a UMTS system or an evolved base station in an LTE system. eNB Wait.

In this step, the reporting process may be initiated by the base station, or may be initiated by the determining network element by requesting reporting. The triggering mode initiated by the base station may also be based on time triggering, or according to the manner in which the energy consumption of the base station is lower than a certain threshold. The reported message can use existing messages, such as: Audit Response message in UTR AN, or Resource Status Report message in E-UTRAN, or direct transmission message between systems ( For example, RIM); the reported message can also be used to add a new report message. In order to identify the identity of the reported network element, the report information of the corresponding base station or the base station may also be included in the report message.

In this step, the energy consumption information refers to the energy consumption of the work of the cell under the jurisdiction of the base station or the base station. The energy consumption information represents the amount of energy consumed by the cell under the jurisdiction of the base station or the base station. The energy consumption information may include one or more of the following: Power consumption, ambient temperature, etc. among them:

The power consumption may be the power (unit: watt) or power consumption (unit: kWh) information of the cell under the jurisdiction of the base station or the base station, or may be part or all of the equipment in the base station room where the base station is located (including the base station and the radio frequency). Power consumption or power consumption of modules, other peripherals such as cooling equipment, etc. The power information can be the current instantaneous power, or the average power or power consumption for a certain period of time. In the specific reporting, the power consumption can directly use the actual power value, or report the unified coded indication information, for example, using an integer between 0 and 100, 0 means that the power consumption is lower than the minimum threshold, 100 Indicates that the power consumption is above the maximum threshold, and other values represent other power consumption levels between the two thresholds, or use other representations.

The ambient temperature may be temperature information of important module components inside the base station, such as CPU temperature or RF module temperature, or temperature information of a specific observation point in the base station. The temperature information can be the current instantaneous temperature, or an average temperature value over a certain period of time. In the specific report, the temperature information can be directly used to the actual temperature value, or the unified coded indication information can be reported, for example, using an integer between 0 and 100, 0 means the temperature is lower than the minimum threshold, and 100 means the temperature is high. At the maximum threshold, other values represent other temperatures between the two thresholds Small, or use other means of representation.

The energy consumption information may further include: one or more of the number of radio units of the cell under the jurisdiction of the base station or the base station, the number of power amplifiers in the radio frequency module, and the number of antennas, and the information may represent the radio frequency of the base station. The amount of energy consumed.

Step 301: The decision network element determines, according to the reported energy consumption information, a cell status under the jurisdiction of the base station.

The cell status includes entering or leaving the power saving state, which may be implemented by means of cell off or on, or reducing/increasing the transmit power, or turning off/on the carrier frequency, or reducing/increasing the number of radio frequency antennas. To achieve the purpose of energy saving.

In this step, a decision strategy is preset in the decision network element for comprehensively considering the energy consumption information, for example, setting weight evaluation criteria for various energy consumption information, for example, the greater the weight, the higher the energy consumption, and the The cell under the highest energy consumption base station is turned off to achieve energy saving purposes. There are many specific decision strategies, which are not limited herein, and are not intended to limit the scope of the present invention.

Through the method of the invention, the operator accurately grasps the energy consumption status of the wireless network, thereby reasonably determining which base stations or cells enter the energy-saving state in a timely manner, and finally achieves the best state of energy saving. In addition, the operator also obtains the running status of each base station in time, thereby implementing flexible adjustment of network parameter configuration, thereby optimizing device performance.

The system of the present invention further provides a system for implementing energy saving in a wireless network, as shown in FIG. 4, which includes at least a base station and a decision network element, where

The base station is configured to report its own energy consumption information to the decision network element.

The decision network element can be OAM. In particular, for the UTRAN network of the UMTS system, the decision network element may also be an RNC; for the E-UTRAN network of the LTE system, the decision network element may also be a neighboring base station; for a network scenario where multiple systems are simultaneously deployed, that is, at some When a local area is deployed in multiple networks such as UMTS and LTE, the decision network element may be a decision network element in other networks. For example, it may be an RNC in a UMTS system, an evolved base station eNB, or the like in an LTE system.

The base station is further configured to report radio resource status information of the cell, where the determining network element is configured to determine, according to the obtained radio resource status information and the energy consumption information, a cell status under the jurisdiction of the base station.

The method of the present invention will be described in detail below with reference to the embodiments. FIG. 5 is a schematic diagram of network coverage according to an embodiment of the present invention. As shown in FIG. 5, cell A, cell B, cell C, and cell D are four cells belonging to different base stations, that is, respectively belong to base station eight, base station B, Base station C and base station D. In the following embodiments, the network coverage in FIG. 5 is taken as an example for description.

In the first embodiment, taking the UTRAN network as an example, it is assumed that the four base stations of the base station A, the base station B, the base station C, and the base station D belong to the same RNC1, and the RNC1 is a decision network element, including: First, the RNC1 respectively goes to the base station A, The base station B, the base station C, and the base station D send an audit request (Report Request) message, and the base station is required to report the energy consumption information.

Then, the base station A, the base station B, the base station C, and the base station D respectively report the energy consumption information of the respective base stations to the RNC1 through an audit response ( Audit Response) message, where the energy consumption information includes: power consumption of each base station (assumed to be each The average power of the base station in the most recent unit time is 2.2kw, 1.0kw, 1.2kw, 1.6kw; the ambient temperature of each base station is 23 degrees Celsius (°C: ), 26°C, 29 °C, 33 ° C; and the number of radio frequency antennas in each base station are 4, 2, 4, and 8, respectively.

Finally, after receiving the energy consumption information reported by the base station A, the base station B, the base station C, and the base station D, the RNC1 sets a weighting evaluation criterion according to comprehensively considering the energy consumption information, for example, respectively, for each energy information: When the power is less than lkw, the weight is 0, and the weight of each O.lkw is increased by 1; when the ambient temperature is lower than 20 °C, the weight is 0, and the weight is increased by 1 for each 1 °C; when the number of antennas is 1, the weight is the lowest. 0, the weight of each additional antenna is increased by 1. The weights of the respective base stations are calculated as 18, 7, 14, 26, respectively, wherein the greater the weight, the higher the energy consumption. Obviously, the base station D has the highest energy consumption among the four base stations. Therefore, the RNC1 decides to notify the cell D under the base station D to be closed, thereby achieving energy saving purposes. In the second embodiment, the E-UTR AN network is taken as an example, where the base station is an evolved base station, that is, an eNB, and the assumed decision network element is the base station A, including:

First, the base station A sends a resource status request (Resource Status Request) message to the evolved base station B, the base station C, and the base station D, and requires the energy consumption information of the base station B, the base station C, and the base station D, and simultaneously requests the wireless of the cell to be reported. Resource status information.

Then, if the base station C and the base station D successfully initiate the measurement of the energy consumption information, the base station B, the base station C, and the base station D respectively report the energy consumption information of the respective base stations to the base station A through the resource status response (Resource Status Response) message, where The energy consumption information includes: The temperature information of each base station CPU is 36°C, 32°C, and 30°C respectively; the power consumption of each base station is lkw, 1.2kw, and 1.3kw respectively; the cell radio resource status information includes: The cell downlink guaranteed bit rate physical resource utilization (DL GBR PRB usage) is 18, 17, 20 (the value represents the percentage value of the utilization).

Finally, the base station A determines the energy-saving state of each base station according to the received energy consumption information reported by the base station C and the base station D, and the physical resource utilization rate of the downlink downlink guaranteed bit rate. For example: the evaluation criteria for each priority weight, the priority weight is 0 when the resource utilization rate is 100, and the priority is 1 when the utilization rate is decreased by 1; the lowest weight is 0 when the power consumption is less than lkw, each increment is 0. The lkw weight is increased by 1; when the ambient temperature is lower than 20 °C, the weight is at least 0, and the weight is increased by 1 for every 1 °C increase. According to the above decision strategy, the weights of each base station are calculated as 98, 97 and 93 respectively, wherein the greater the weight, the higher the energy saving priority. The C energy consumption is the highest among the three base stations. Therefore, the base station A notifies the cell C under the base station C to be closed, thereby achieving energy saving purposes.

In the second embodiment, it is required to report the related content of the cell radio resource status information to the existing content. In the third embodiment, the E-UTR AN network is taken as an example, wherein the base station is an evolved base station, that is, an eNB, and the decision network element is an OAM, including:

The base station A, the base station B, the base station C, and the base station D periodically report their respective power consumption information to the OAM. The energy consumption information includes the temperature information of the base station, such as the base station VIII, the base station B, and the base station.

The temperatures of C and base station D are 50 ° C:, 32 ° C, 38 ° C and 42 ° C, respectively, where the temperature can be The average temperature measured by the base station equipment;

Based on the received energy consumption information reported by the base station 8, the base station B, the base station C, and the base station D, the OAM considers that the temperature of the base station A is too high, and notifies the cell A under the base station A to reduce the transmission power according to a preset decision policy.

The fourth embodiment is exemplified by a UTRAN network and an E-UTRAN network, where the base station A is a base station in the UTRAN network and is connected to the RNC 2, and the RNC 2 is a decision network element, and the base station B, the base station C, and the base station D are E. - The eNB in the UTRAN network is generally described as follows:

The base station B, the base station C, and the base station D report the respective energy consumption information to the RNC 2 through the direct transmission RIM message between the systems at a fixed time every day (for example, 10:00 pm); at the same time, the base station A also consumes the energy consumption information of the base station. The new energy consumption report message is reported to RNC2. The power consumption information of the base station B, the base station C, and the base station D includes: power consumption of each base station, respectively, lkw, 1.2kw, and 1.6kw;

After receiving the energy consumption information reported by the base station A, the base station B, the base station C, and the base station D, the RNC2 assumes that the energy consumption of the base station D is the largest. Therefore, the cell D under the base station D is notified to be closed, thereby achieving energy saving.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.

Claims

Claim

A method for implementing energy saving in a wireless network, characterized in that:

2. The method according to claim 1, wherein the energy consumption information comprises one or more of the following: power consumption, ambient temperature.

The method according to claim 2, wherein the energy consumption information further includes the number of radio frequency units of the cell under the jurisdiction of the base station or the base station, the number of power amplifiers in the radio frequency module, and the number of antennas. One or any combination.

The method according to claim 1, wherein the decision network element maintains an OAM for operation management; or

The method according to claim 1, wherein the method further comprises: the base station further reporting radio resource status information of the cell;

The decision network element determines a cell status under the jurisdiction of the base station according to the obtained radio resource status information and the energy consumption information.

The method according to any one of claims 1 to 5, wherein the reporting method is: the base station actively initiates, or the determining network element is initiated by requesting reporting by the base station.

The method according to claim 6, wherein the reported message is an existing message or a newly added message;

The existing message is: an audit response message in UTRAN, or a resource in E-UTRAN Source status response message, or direct message between systems.

The method according to any one of claims 1 to 5, wherein a decision policy is pre-set in the decision network element; determining the cell status under the jurisdiction of the base station comprises: The information, or the obtained energy consumption information and the radio resource status information of the cell, use the decision strategy to make a decision to determine whether the cell enters or leaves the energy saving state.

The method according to claim 8, wherein the determining whether the cell enters or leaves the power saving state is: the cell is turned off/on, or the transmit power is decreased/increased, or the carrier frequency is turned off/on, or the radio frequency is decreased/increased. The number of antennas.

A system for implementing energy saving in a wireless network, characterized in that it includes at least a base station and a decision network element, where

a base station, configured to report its own energy consumption information to the decision network element;

The determining network element is configured to determine, according to the reported energy consumption information, a cell status under the jurisdiction of the base station.

The system according to claim 10, wherein the decision network element is further configured to send a request for reporting energy consumption information to the base station.

The system according to claim 10 or 11, wherein, for a network scenario in which multiple systems are deployed simultaneously, the decision network element is a decision network element in a network or a network in which it is located.

13. The system of claim 12, wherein

The decision network element is OAM; or

14. The system of claim 10, wherein:

15. The system of claim 10, 11 or 14, wherein said energy consumption The information includes one or more of the following: power consumption, ambient temperature.

The system according to claim 15, wherein the energy consumption information further includes the number of radio frequency units in the cell under the jurisdiction of the base station or the base station, the number of power amplifiers in the radio frequency module, and the number of antennas. One or any combination.