WO2012151982A1

WO2012151982A1 - Method and system for processing relay node hibernation

Info

Publication number: WO2012151982A1
Application number: PCT/CN2011/083784
Authority: WO
Inventors: 杨瑾; 毕峰; 梁枫; 王斌; 吴栓栓; 袁明; 袁弋非
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-05-11
Filing date: 2011-12-09
Publication date: 2012-11-15
Also published as: CN102781074A

Abstract

Disclosed are a method and system for processing relay node hibernation; the method comprising: a network side or a relay node determining that the relay node enters a hibernation mode according to a preset hibernation policy; and the relay node entering the hibernation mode. In the present invention, a relay node and an RN cell thereof can enter a hibernation state according to a preset hibernation policy, thereby avoiding interference, improving network performance, and conserving network resources.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a method and system for processing a sleep of a relay station. BACKGROUND OF THE INVENTION Relay technology, as an emerging technology, has attracted more and more attention and is regarded as a key technology of B3G/4G. Since future wireless communication or cellular systems require complete network coverage and support for higher rate transmission, this poses new challenges for wireless communication technologies. At the same time, the cost of system construction and maintenance is more prominent. As the transmission rate and communication distance increase, the energy consumption problem of the battery becomes prominent, and the future wireless communication will adopt a higher frequency, thereby causing a more serious path loss attenuation. Through the relay technology, the traditional single-hop link can be divided into multiple multi-hop links. Due to the shortened distance, the path loss will be greatly reduced, which will improve the transmission quality and expand the communication range, thereby providing users with more Fast and better service. 1 is a schematic diagram of a structure of a relay network according to the related art. As shown in FIG. 1, a link between a base station (e B) and a macro user equipment (M-UE) in a network is called a direct transmission. A link between a base station and a relay node (Relay Node, referred to as RN) is called a backhaul link or a relay link, which is also called an Un interface. The cell that the relay station covers the service is called A relay cell (RN cell, abbreviated as R-cell), and a link between a relay station and a relay user equipment (Relay User Equipment, R-UE for short) is called an access link, and is in the backhaul chain. The base station serving the relay station on the road is called the home base station De B (Donor eNB ) of the relay station. Depending on the deployment and requirements of the network, the RN can be set up in a fixed location to provide services for hotspot cells or cell edge users. Mobile entities, such as cars, trains, ships, etc., provide services to users inside the vehicle. Furthermore, with the changes in network environment factors such as network load, user demand, energy saving, and wireless channel interference, the working state of the RN also needs to be adjusted accordingly. The following examples are given. When the RN is deployed in a hotspot cell, the user demand of the hotspot cell has a relatively obvious time rule. If the coverage service of the RN cell can be adjusted according to the needs of the cell user, the network resource can be saved when the RN cell service is stopped during the period when the user density in the cell decreases. When the RN is deployed on the train, the train moves as a vehicle. Internal users provide services. When the train stops at the stop, because there may be multiple trains in the station at the same time, the corresponding multiple onboard RNs are concentrated at a small distance. Within the scope, it will bring some mutual interference to the network. If the working state of the RN can be adjusted according to the number of in-vehicle RNs in the station, mutual interference can be mitigated and the user experience can be improved. However, the RN in the related art cannot perform the above adaptive adjustment. SUMMARY OF THE INVENTION The present invention provides a method and system for processing a sleep of a relay station to at least solve the problem that the relay station cannot perform adaptive adjustment in the related art. In order to achieve the above object, according to an aspect of the present invention, a processing method of a relay station sleep is provided. The processing method for the sleep of the relay station according to the present invention includes: the network side or the relay station determines that the relay station enters the sleep mode according to the preset sleep policy; and the relay station enters the sleep mode. After the network side determines that the relay station enters the sleep mode according to the preset sleep policy, the method further includes: the network side instructing the relay station to enter the sleep mode by using high layer signaling or signaling based on the X2 interface. The higher layer signaling is relay station reconfiguration signaling. After the relay station determines that the user enters the sleep mode according to the preset sleep policy, the method further includes: the relay station notifies the network side to enter the sleep mode by using the high layer signaling or the signaling based on the X2 interface. The higher layer signaling is the relay station configuration update signaling. According to the preset sleep policy, determining that the relay station enters the sleep mode includes one of the following: determining that the relay station enters the sleep mode according to the preset sleep sleep policy; determining that the relay station enters the sleep mode according to the preset fixed-point sleep policy; A preset sleep threshold policy determines that the relay station enters sleep mode. The network environment factor includes at least one of the following: interference degree of the direct transmission link, signal to noise ratio of the direct transmission link, interference degree of the access link, signal to noise ratio of the access link, and relay station under the home base station of the relay station The number, the moving speed of the relay station, the distance between the relay station and the home base station of the relay station, and the load of the relay station. The network side includes at least one of the following: a base station, a relay station, a cell cooperation entity, a gateway, a mobility management entity, an evolved universal terrestrial radio access network, an operation management, and a maintenance manager. The entering the sleep mode of the relay station includes: The relay station clears the user equipment of the subordinate relay cell. The user equipment of the relay station clearing the subordinate relay cell includes: the relay station uses its own home base station as the primary serving cell; and the relay station switches the user equipment in the radio resource control connection state to the primary serving cell. The user equipment of the relay station clearing the subordinate relay cell includes: the relay station uses its own home base station as the neighboring cell; the relay station notifies the home base station of the user equipment of the subordinate relay cell as the neighboring cell by using the broadcast message. After the relay station notifies the neighboring cell of the user equipment of the subordinate relay cell as a neighboring cell by using the broadcast message, the method further includes: performing, by the user equipment of the relay cell in the radio resource control idle state, cell reselection or cell search; The user equipment of the relay cell in the radio resource control idle state camps on the cell selected by the cell reselection or cell search. The relay station enters the sleep mode to include at least one of the following: the relay station closes the service for the access link; the relay station maintains the Un connection with its own home base station; the relay station exits the relay station mode; the relay station accesses its own home base station as the user equipment; the relay station and The own home base station maintains the radio resource control connection state; the relay station maintains the radio resource control idle state with its own home base station. In order to achieve the above object, according to another aspect of the present invention, a processing system in which a relay station sleeps is provided. The processing system for the sleep of the relay station according to the present invention includes the processing device for the sleep of the relay station and the relay station, wherein the processing device for the sleep of the relay station is located at the network side or within the relay station, and the processing device for the sleep of the relay station includes: a determination module, configured to be set according to the preset sleep The policy determines that the relay station enters the sleep mode; the hibernation module, located in the relay station, is set to enter the sleep mode of the relay station. Through the invention, the relay station and its relay cell can enter the sleep state according to the preset sleep policy, thereby avoiding interference, improving network performance, and saving network energy and the like. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a schematic diagram of a relay network structure according to the related art; FIG. 2 is a flowchart of a processing method of a relay station sleep according to an embodiment of the present invention; 3 is a flowchart of a method for determining a relay station sleep processing by a network side according to an embodiment of the present invention; FIG. 4 is a flowchart of a method for determining a self-sleep processing by a relay station according to an embodiment of the present invention; FIG. 5 is a preferred implementation according to the present invention. FIG. 6 is an interaction flowchart of the relay station indicating that the relay station is dormant by the high layer signaling; FIG. 6 is an interaction flowchart of the relay station notifying the network side to enter the sleep mode according to the preferred embodiment 3 of the present invention; FIG. 7 is a preferred implementation according to the present invention. The network side of the fourth example indicates the interaction flowchart of the relay station dormancy through the X2 interface signaling; FIG. 8 is a structural block diagram of the processing system for the relay station to sleep according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. The present invention provides a method for processing a sleep of a relay station. FIG. 2 is a flowchart of a method for processing a sleep of a relay station according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps S202 to S204. Step S202, the network side or the relay station determines that the relay station enters the sleep mode according to the preset sleep policy. Step S204, the relay station enters a sleep mode. In the related art, the relay station cannot perform adaptive adjustment. In the embodiment of the present invention, the relay station and its relay cell can enter the sleep state according to the preset sleep policy, thereby avoiding interference, improving network performance, and saving network energy. Preferably, after the network side determines that the relay station enters the sleep mode according to the preset sleep policy, the method further includes: the network side instructing the relay station to enter the sleep mode by using high layer signaling or signaling based on the X2 interface. Preferably, the higher layer signaling is relay station reconfiguration signaling (RN Reconfiguration). Preferably, the network side includes at least one of the following: a base station, a relay station, a multi-cell/multicast coordination entity (MCE), a gateway, a mobility management entity (Mobile Management Entity, MME for short), an evolved universal Terrestrial Wireless Access Network (Evolved Universal) Terrestrial Radio Access Network (E-UTRAN), Operation Administration and Maintenance (OAM) Manager. Preferably, when the RN enters the sleep mode by another entity other than the network side base station (such as OAM), the network side indicates to the RN to enter the sleep mode through the DeNB, and when the DeNB decides, the DeNB directly indicates the RN. Or, the DeNB instructs the RN to enter the sleep mode by sending the indication signaling to the X2 interface between the RN and the RN. FIG. 3 is a flowchart of a method for determining a relay station sleep processing by a network side according to an embodiment of the present invention. As shown in FIG. 3, the following steps S302 to S308 are included. Step S302, according to the preset sleep policy, the network side determines whether the RN enters a sleep mode. Step S304, the network side instructs the RN to enter the sleep mode by using the DeNB. Step S306, the RN clears the R-UE of the RN cell. Step S308, the RN enters a sleep mode. Preferably, after the relay station determines that the user enters the sleep mode according to the preset sleep policy, the method further includes: the relay station notifying the network side to enter the sleep mode by using the high layer signaling or the signaling based on the X2 interface. Preferably, the higher layer signaling is a relay station configuration update signaling (RN configuration update or EB configuration update). Preferably, the RN notifies the network side that it enters the sleep mode, and the notification to the network side also includes the notification to the RN neighboring cell, so that the cell and the e B that maintain the neighbor cell relationship with the RN can learn that the RN enters the sleep mode. Preferably, according to the preset sleep policy, determining that the relay station enters the sleep mode comprises one of: determining that the relay station enters the sleep mode according to the preset sleep sleep policy; determining that the relay station enters the sleep mode according to the preset fixed-point sleep policy; The environmental factor and the preset sleep threshold policy determine that the relay station enters sleep mode. Preferably, the pre-set sleep policy is sent by the network side to the RN. The RN itself decides to enter the sleep mode when the condition is met according to the conditions required by the sleep policy. FIG. 4 is a flowchart of a method for determining a self-sleep processing by a relay station according to an embodiment of the present invention, including the following steps S402 to S408. Step S402, according to the preset sleep policy, the RN determines whether it enters the sleep mode. Step S404, the RN notifies the network side of its own status update. Step S406, the RN clears the RN cell R-UE. Step S408, the RN enters a sleep mode. Specifically, the timed sleep policy means that the RN enters the sleep mode within a specified time period; the fixed point sleep policy means that the RN enters the sleep mode when it is located in the designated area. Specifically, for the network side to determine that the relay station enters the sleep mode, the network side may obtain the foregoing network environment factors by the following two methods: (1) the network side measurement acquires the foregoing network environment factor; (2) the relay station measurement acquires the foregoing network environment factor And reported to the network side. At the same time, for the case where the relay station determines that it enters the sleep mode, the network environment factor can be obtained by the relay station itself. Preferably, the network environment factor includes at least one of the following: a degree of interference of a direct link (Direct Link), a signal to noise ratio of a direct link (Direct Link), an interference degree of an access link (Access Link), and a connection The signal-to-noise ratio of the incoming link (Access Link), the number of relay stations under De B, the moving speed of the relay station, the distance between the relay station and the home base station of the relay station, and the load of the relay station. The following takes several environmental factors among the above network environment factors as an example to describe in detail how the present invention avoids interference and improves network performance.

(1) Number of relay stations under the DeNB The relay stations can move with the bearer entities such as vehicles and ships, which makes it possible to have multiple relay stations simultaneously under the same DeNB. When the number of the relay stations is large, the mutual interference may be caused between the macro cell and the multiple relay station cells. Therefore, the network side determines according to the number of the relay stations under the DeNB. When the number exceeds a certain threshold, the network side Instructing one or more of the multiple relay stations to enter the sleep mode can avoid interference and improve network performance.

(2) The moving speed of the relay station For the mobile relay station carried on the vehicle and the ship, the sleep of the relay station can be judged according to the moving speed of the relay station, that is, the moving speed of the vehicle and the ship where the relay station is located. Specifically, the motion speed of the relay station may be obtained by the network side measurement, or obtained by the relay station measurement, or measured by the relay station and reported to the network side. For the mobile relay station, the network side can set a certain speed threshold. When the motion speed of the relay station meets the threshold value, the network side indicates that the relay station enters the sleep mode; or the network side sets the speed threshold configuration to the relay station, and the relay station monitors its own speed. When the own speed satisfies the threshold configuration, the relay station decides to enter the sleep mode itself. The speed threshold may be a specific speed value. If the speed is lower than 5 km/h, the relay station enters the sleep mode, or may be a certain speed interval. If the relay station is at a speed of 5-10 km/h, the relay station enters the sleep mode.

(3) The distance between the relay station and the DeNB of the relay station For the mobile relay station carried on the vehicle and ship, the distance between the relay station and the DeNB changes with the movement of the vehicle and the ship. The distance between the specific relay station and the DeNB can be obtained by the network side measurement, or by The relay station obtains the measurement, or is measured by the relay station and reported to the network side. The network side may set a certain distance threshold. When the distance between the relay station and the DeNB meets the threshold, the network side indicates that the relay station enters the sleep mode; or the network side indicates the distance threshold configuration to the relay station, and the relay station monitors the relationship between itself and the DeNB. Distance, when the threshold configuration is satisfied, the relay station decides to enter the sleep mode itself. The distance threshold may be a specific distance value. If the distance between the two is less than 5 km, the relay station enters the sleep mode, or may be a certain distance interval. If the distance between the two is 5-10 km, the relay station enters the sleep mode.

(4) Load of the relay station When the load of the relay station cell changes, the relay station can enter the normal working mode or enter the sleep mode in consideration of factors such as performance and energy saving of the overall network. Further, as the relay station enters the sleep mode, the user is served by the DeNB or other cell. Specifically, the load of the relay station may be one of the number of R-UEs included in the relay station, the number of R-UEs in the Radio Resource Control (RRC) Connected state, and the R-UE data traffic. Item or multiple determinations. In combination with any of the above network environment factors, the network side or the RN itself determines according to the preset sleep policy and threshold, and determines whether the RN needs to enter the sleep mode. Preferably, the entering the sleep mode of the relay station comprises: the relay station clearing the user equipment of the subordinate relay cell. The preferred embodiment is for ensuring a smooth transition of the user equipment. Preferably, the user equipment of the relay station clearing the subordinate relay cell includes: the relay station uses the DeNB as the primary serving cell; and the relay station switches the user equipment in the radio resource control connection state to the primary serving cell. Preferably, the user equipment of the relay station clearing the subordinate relay cell includes: the relay station uses the DeNB as the neighboring cell; the relay station notifies the DeNB of the user equipment of the subordinate relay cell as the neighboring cell by using the broadcast message. Preferably, after the relay station notifies the DeNB of the user equipment of the subordinate relay cell as the neighboring cell by using the broadcast message, the method further includes: the user equipment of the relay cell in the radio resource control idle state. The cell reselection or the cell search is performed; the user equipment of the relay cell in the radio resource control idle state camps on the cell selected by the cell reselection or the cell search. In the preferred embodiment, after the relay station gradually reduces the transmission power of the relay station cell base station facing the access link, or the relay station enters the sleep mode to stop the relay station cell service, the user equipment currently in the radio resource control idle (RRC Idle) state passes. Cell reselection or cell search, camping in the primary serving cell or other cell. Preferably, the relay station enters the sleep mode to include at least one of: the relay station closes the service for the access link; the relay station maintains the Un connection with its own DeNB; the relay station exits the relay station mode; the relay station accesses its own DeNB with the identity of the user equipment; Maintaining a radio resource control connection state with its own DeNB; the relay station maintains a radio resource control idle state with its own DeNB. The above operation of entering the sleep mode will be described in detail below.

(1) The relay station turns off the service for the access link, that is, the relay station turns off the signal transmission as the relay station cell base station facing the access link, that is, stops the relay station cell service.

(2) The relay station maintains an Un connection with its own DeNB. For the backhaul link, the sleep mode of the relay station can be maintained in different states. The sleep mode of the relay station may not affect the connection between the relay station and the DeNB by changing the relay station, that is, the relay station maintains the same connection state as the DeNB in the normal working mode in the sleep mode, and the relay station enters the sleep mode and only turns off the signal of the relay station facing the access link. Transmit, no changes are made to the connection or status of the Un interface.

(3) The relay station exits the relay station mode. The sleep mode of the relay station means that the relay station exits the relay station mode, abandons the relay station identity, re-accesses the network as the UE identity, and maintains the connection with the resident cell eNB.

(4) The relay station accesses its own DeNB as the user equipment. When the relay station enters the sleep mode and re-accesses the network as the user equipment, it can further maintain the RRC Idle state of the user equipment, or The eNB remains in the RRC CO NTECTED state of the user equipment. The implementation process of the embodiment of the present invention will be described in detail below with reference to examples. Preferred embodiment 1 The preferred embodiment 1 uses 0AM as the network side decision entity, and describes the process in which the OAM determines the relay station to enter the sleep mode according to the preset timing sleep policy.

The RN is deployed in hotspots to balance the load on the network and ensure user service performance. In this scenario, because user density and service requirements have certain time regularity, OAM can pre-set the sleep policy for this RN according to the time characteristics of the user. When the time set by the sleep policy arrives, such as 8:00 every day. Point, the RN is judged to enter the sleep mode.

After receiving the indication signaling to enter the sleep mode, the RN uses the DeNB as the primary serving cell, and switches the R-UE currently in the RRC connected state to the primary serving cell to continue the service. In addition, the RN uses the DeNB as a neighboring cell to notify the RN cell user in the system broadcast message. Then, the RN enters the sleep mode, and the signal is transmitted to the Access Link of the RN cell base station to stop the RN cell service. Then, the R-UE that is in the RRC Idle state searches for the cell in the primary serving cell or other cell.

The RN enters the sleep mode, maintains the same connection state as the DeNB in the normal working mode, and does not make any adjustments to the connection or state of the Un interface. Preferred Embodiment 2 The preferred embodiment 2 describes the DeNB as a network side decision entity, and determines a process in which the relay station enters the sleep mode according to the distance between the relay station and the DeNB and the preset sleep policy and threshold.

The RN is deployed on a high-speed train. As the train moves, the switch is switched between the corresponding e Bs. The appropriate eNB is selected as the current DeNB, and the connection with the network side and the performance of the Un interface are maintained, and the ReNB is further R- The UE provides the service. In this scenario, because the distance between the RN and the DeNB changes in real time, when the train enters the station, there may be multiple trains and corresponding RNs in the station at the same time, forming a multi-cell overlapping coverage scene, bringing strong mutuals. interference. At this time, as the train enters the station, the RN accesses the eNB near the station as the DeNB, and the DeNB can set the threshold when the distance between the RN and the DeNB reaches the set threshold according to the preset fixed-point sleep policy, for example, if it is less than 5 km, the decision is passed through the upper layer. The signaling RNReconfiguration indicates that the RN enters a sleep mode. FIG. 5 is an interaction flow diagram of the network side indicating the sleep of the relay station by the high layer signaling according to the second embodiment of the present invention. As shown in FIG. 5, the following steps S502 to S504 are included. Step S502: The DeNB sends an RN ReCONFIGURATION to the RN, instructing the RN to enter a sleep mode.

After receiving the indication signaling to enter the sleep mode, the RN uses the DeNB as the primary serving cell, and switches the R-UE currently in the RRC connected state to the primary serving cell to continue the service. In addition, the RN uses the DeNB as a neighboring cell to notify the RN cell user in the system broadcast message. After that RN gradually decreases as a small RN The R-UE of the area base station facing the Access Link, the R-UE originally in the RRC Idle state, re-selects in the primary serving cell or other cell. The RN gradually reduces the transmission power, and finally turns off the signal transmission as the RN cell base station for Access Link, and stops the RN cell service. Step S504: The relay station enters a sleep mode, and sends an RN ReCO FIGURATION ACKNOWLEDGE to the DeNB, notifying the network side that the sleep mode is entered according to the indication, and maintaining the same connection state as the DeNB in the normal working mode, and does not perform any adjustment on the connection or state of the Un interface. . Preferred Embodiment 3 The preferred embodiment 3 describes a process in which the relay station determines the relay station to enter the sleep mode according to network environment factors (signal-to-noise ratio of the direct transmission link and the signal-to-noise ratio of the access link). The RN is deployed on a high-speed train. As the train moves, the switch is switched between the corresponding e Bs. The appropriate eNB is selected as the current DeNB, and the connection with the network side and the performance of the Un interface are maintained, and the ReNB is further R- The UE provides the service. In this scenario, since the distance between the RN and the DeNB changes in real time, when the train enters the station, the RN accesses the eNB near the station as the DeNB. There may be multiple trains and corresponding RNs in the station at the same time, forming a multi-cell overlapping coverage scene, which brings strong mutual interference. At this time, the RN measures the wireless channel interference, including the signal-to-noise ratio of Access Link and Direct Link, and determines whether it enters the sleep mode according to the measurement result, the dormancy policy, and the threshold. When the network environment factor meets the threshold, the RN decides to enter itself. Sleep mode. 6 is an interaction flowchart of a relay station notifying a network side of entering a sleep mode according to a preferred embodiment 3 of the present invention. As shown in FIG. 6, when the RN determines that it needs to enter a sleep mode, the RN notifies the network by using an RN CONFIGURATION UPDATE message. The side itself is updated. Preferably, the network side replies to the RN that its status update is known by the RN CONFIGURATION UPDATE ACKNOWLEDGE message.

The RN uses the DeNB as the primary serving cell, and switches the R-UE currently in the RRC connected state to the primary serving cell to continue the service. In addition, the RN uses the DeNB as a neighboring cell and notifies the RN cell user in the system broadcast message. After that, the RN gradually reduces the transmission power of the RN cell base station to the Access Link, and the R-UE that is originally in the RRC Idle state re-selects in the primary serving cell or other cells. The RN gradually reduces the transmission power, and finally turns off the signal transmission as the RN cell base station for Access Link, and stops the RN cell service.

The RN enters the sleep mode, maintains the same connection state as the DeNB in the normal working mode, and does not make any adjustments to the connection or state of the Un interface. Preferred Embodiment 4 The preferred embodiment 4 describes the DeNB as a network side decision entity, and determines the process in which the relay station enters the sleep mode according to the network environment factor (the number of relay stations served under the DeNB).

The RN is deployed on a high-speed train. As the train moves, the eNB switches between the corresponding eNBs, selects the appropriate eNB as the current DeNB, maintains the connection with the network side, and the performance of the Un interface, and the local DeNB further becomes R- The UE provides the service. In this scenario, as the train enters the station and the RN accesses the eNB near the station as the DeNB, the DeNB can decide whether to convert all or part of the RN to the sleep mode according to the number of RNs simultaneously accessed. When the system pre-sets the threshold to access 5 RNs, when the number of RNs accessed by the same DeNB exceeds 5, the DeNB decides and indicates to the RN through the X2 interface signaling RN Dormant. FIG. 7 is a flow chart of the network side indicating the sleep of the relay station through the X2 interface signaling according to the fourth embodiment of the present invention. As shown in FIG. 7, the following steps S702 to S704 are included. Step S702, the DeNB sends the RN Dormant to the RN.

After receiving the indication signaling to enter the sleep mode, the RN uses the DeNB as the primary serving cell, and switches the R-UE currently in the RRC connected state to the primary serving cell to continue the service. In addition, the RN uses the DeNB as a neighboring cell to notify the RN cell user in the system broadcast message. After the RN enters the sleep mode, the signal transmission of the RN cell base station to the Access Link is turned off, and the RN cell service is stopped. Then, the R-UE that is in the RRC Idle state searches for the cell in the primary serving cell or other cell. Step S704, the RN enters a sleep mode, and sends an RN Dormant ACKNOWLEDGE to the DeNB, notifying that the network side has entered the sleep mode according to the indication, and maintains the same connection state as the DeNB in the normal working mode, and does not perform any adjustment on the connection or state of the Un interface. Preferred Embodiment 5 This preferred embodiment 5 describes a process in which a relay station determines that a relay station enters a sleep mode according to its own moving speed. The RN is deployed on a high-speed train. As the train moves, the eNB switches between the corresponding eNBs, selects the appropriate eNB as the current DeNB, maintains the connection with the network side, and the Un interface performance, and further the R-UE through the DeNB. Provide services. In this scenario, the RN can monitor its own motion speed and decide whether to enter the sleep mode according to the sleep policy and the set speed threshold. When the RN passes the measurement, it finds that its own motion speed reaches the set threshold, for example, when it is lower than 10km/h, the RN decides that it needs to enter the sleep mode. The RN notifies the network side by configuring the update message, and the ENB configuration update message is used as the primary serving cell, and the R-UE currently in the RRC connected state is switched to the primary serving cell to continue the service. In addition, the RN uses the DeNB as a neighboring cell to notify the RN cell user in the system broadcast message. After that, the RN gradually reduces the transmission power of the RN cell base station to the Access Link, and the R-UE that is originally in the RRC Idle state re-selects in the primary serving cell or other cells. The RN gradually reduces the transmission power, and finally turns off the signal transmission as the RN cell base station for Access Link, and stops the RN cell service.

After the RN enters the sleep mode, it maintains the same connection state as the DeNB in the normal working mode, and does not make any adjustments to the connection or state of the Un interface. Preferred Embodiment 6 This preferred embodiment 6 describes a process in which a relay station determines that a relay station enters a sleep mode according to its own load.

The RN is deployed on a high-speed train. As the train moves, it switches between the corresponding e Bs, selects the appropriate eNB as the current DeNB, maintains the connection with the network side and the performance of the Un interface, and further passes the DeNB to the R. - UE provides services. In this scenario, as the train enters the station, there may be multiple trains and corresponding RNs in the station at the same time, forming a multi-cell overlapping coverage scenario, which brings strong mutual interference. At this time, the RN determines whether it enters the sleep mode according to the load condition of its own RN cell. When the RN determines that the RN cell user load, the dormancy policy, and the threshold are required to enter the sleep mode, the RN notifies the network side by configuring an update message, such as an ENB configuration update message, and uses the DeNB as the primary serving cell to be in the RRC connected state. The R-UE switches to the primary serving cell and continues the service. In addition, the RN uses the DeNB as a neighboring cell to notify the RN cell user in the system broadcast message. After that, the RN gradually reduces the transmit power of the RN cell base station to the Access Link, and the R-UE that is originally in the RRC Idle state re-selects in the primary serving cell or other cells. The RN gradually reduces the transmission power, and finally turns off the signal transmission as the RN cell base station for Access Link, and stops the RN cell service. After the RN enters the sleep mode, it maintains the same connection state as the DeNB in the normal working mode, and does not make any adjustments to the connection or state of the Un interface. It should be noted that the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different than that herein. The embodiment of the invention provides a processing system for the sleep of the relay station, and the processing system for the sleep of the relay station can be used to implement the processing method for the sleep of the relay station. 8 is a structural block diagram of a processing system for a relay station to sleep according to an embodiment of the present invention. As shown in FIG. 8, a processing device 82 including a relay station sleep and a relay station 84, wherein the processing device 82 for sleeping at the relay station is located at the network side or within the relay station 84. The processing device 82 for the sleep of the relay station includes: a determining module 822, configured to determine that the relay station 84 enters the sleep mode according to the preset sleep policy; the sleep module 842 is located in the relay station 84, and is connected to the determining module 822, and is set to enter the sleep station. mode. It should be noted that the processing system of the relay station dormant described in the device embodiment corresponds to the foregoing method embodiment, and the specific implementation process has been described in detail in the method embodiment, and details are not described herein again. In summary, according to the above embodiments of the present invention, a method and system for processing a relay station sleep are provided. Through the invention, the relay station and its relay cell can enter the sleep state according to the preset sleep policy, thereby avoiding interference, improving network performance, and saving network energy and the like. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for processing a sleep of a relay station, comprising:

The network side or the relay station determines that the relay station enters a sleep mode according to a preset sleep policy; the relay station enters a sleep mode.

The method according to claim 1, wherein, after the network side determines that the relay station enters the sleep mode according to the preset sleep policy, the method further includes:

The network side instructs the relay station to enter a sleep mode through high layer signaling or signaling based on the X2 interface.

3. The method according to claim 2, wherein the higher layer signaling is relay station reconfiguration signaling.

The method according to claim 1, wherein after the relay station determines that the user enters the sleep mode according to the preset sleep policy, the method further includes:

The relay station notifies the network side to enter the sleep mode by means of higher layer signaling or signaling based on the X2 interface.

5. The method according to claim 4, wherein the higher layer signaling is relay station configuration update signaling.

The method according to any one of claims 1 to 5, wherein, according to a preset sleep policy, determining that the relay station enters the sleep mode comprises one of the following:

Determining that the relay station enters a sleep mode according to a preset sleep sleep policy; determining that the relay station enters a sleep mode according to a preset fixed-point sleep policy; determining that the relay station enters sleep according to a network environment factor and a preset sleep threshold policy mode.

The method according to claim 6, wherein the network environment factor comprises at least one of: a degree of interference of a direct transmission link, a signal to noise ratio of a direct transmission link, an interference degree of an access link, and a connection a signal-to-noise ratio of the ingress link, a number of relay stations under the home base station of the relay station, a moving speed of the relay station, a distance between the relay station and a home base station of the relay station, and a load of the relay station.

The method according to any one of claims 1 to 5, wherein the network side includes at least the following Base station, relay station, cell coordination entity, gateway, mobility management entity, evolved universal terrestrial radio access network, operation management and maintenance manager.

9. The method according to claim 1, wherein the entering the sleep mode by the relay station comprises: the relay station clearing a user equipment of a subordinate relay cell.

10. The method according to claim 9, wherein the user equipment of the relay station clearing the subordinate relay cell comprises:

The relay station uses its own home base station as a primary serving cell;

The relay station switches the user equipment in a radio resource control connection state to the primary serving cell.

The method according to claim 9, wherein the user equipment of the relay station clearing the subordinate relay cell comprises:

The relay station uses its own home base station as a neighboring cell;

The relay station notifies the user equipment of the subordinate relay cell that the own home base station of the subordinate relay cell is the neighboring cell by using a broadcast message.

The method according to claim 11, wherein after the relay station notifies the user equipment of the subordinate relay cell that the own home base station is the neighboring cell by using a broadcast message, the method further includes: The user equipment of the relay cell in which the radio resource controls the idle state performs cell reselection or cell search;

The user equipment of the relay cell in the radio resource control idle state camps on the cell selected by the cell reselection or cell search.

The method according to any one of claims 1 to 5, 9 to 12, wherein the relay station enters a sleep mode comprising at least one of the following:

The relay station closes a service directed to the access link;

The relay station maintains an Un connection with its own home base station;

The relay station exits the relay station mode;

The relay station accesses its own home base station as the identity of the user equipment;

The relay station maintains a radio resource control connection state with its own home base station;

The relay station maintains a radio resource control idle state with its own home base station. A processing system for sleeping of a relay station, comprising: a processing device for sleeping of a relay station, and a relay station, wherein the processing device for sleeping of the relay station is located at or located in the network, and the processing device for sleeping in the relay station comprises: a determining module, configured to Determining that the relay station enters a sleep mode according to a preset sleep policy;

A hibernation module, located in the relay station, is set to enter the sleep mode of the relay station.