WO2011091748A1

WO2011091748A1 - Method, enhanced node base and system for transmitting data

Info

Publication number: WO2011091748A1
Application number: PCT/CN2011/070626
Authority: WO
Inventors: 陈小锋; 白伟
Original assignee: 华为技术有限公司
Priority date: 2010-01-26
Filing date: 2011-01-26
Publication date: 2011-08-04
Also published as: CN102137500A; CN102137500B

Abstract

A method, an enhanced node base and a system for transmitting data are disclosed in the present invention which belongs to the field of communications technology. The method includes that: in a Time Division Duplex(TDD) network, for a cell in which relay nodes are disposed, referring to an initial time line of the network, the enhanced node base of the cell maintains uplink sub-frames and uplink portions of special sub-frames of the cell time line unchanged, and reconfigures the protection time length of the special sub-frames of the cell time line, and referring to downlink sub-frames and downlink portions of the special sub-frames of the initial time line, delays the downlink sub-frames and downlink portions of the special sub-frames of the cell time line in which the protection time is reconfigured, to obtain a new time line(201), and the enhanced node base of the cell performs a data communication with a User Equipment(UE) or the relay nodes according to the new time line(202). The enhanced node base includes a processing module and a transmission module. The system includes the enhanced node base and relay nodes. The embodiments of the present invention adjust the protection time of the time line and the downlink time line of the cell in which the relay nodes are disposed, thus avoiding production of interference.

Description

Method, base station and system for transmitting data

The present application claims priority to Chinese Patent Application No. 201010105145.X, filed on Jan. 26, 2010, entitled "Method, Base Station, and System for Transmitting Data", the entire contents of which are incorporated by reference. In this application. Technical field

The present invention relates to the field of communications technologies, and in particular, to a method, a base station, and a system for transmitting data. Background technique

In TDD (Time Division Duplex) networks, relaying provides good user coverage and data throughput. At the same time, when a relay backhaul link between an eNB (enhanced Node Base) and a relay relay node is relayed with a relay node and a UE (User Equipment) it serves When the ingress link uses the same frequency band or adjacent frequency band for communication, if the relay node transmits and receives at the same time, the signal sent by the relay node is received by the relay node itself, thereby forming a receiving signal to the relay node. The interference causes a self-backhaul interference problem.

In order to avoid loopback self-interference, the time when the relay node receives the data sent by the UE it serves and the time when the relay node sends data to the base station it is in need to be cross-staggered; the time when the relay node sends data to the UE it serves The time at which the relay node receives the data transmitted by the base station to it also needs to be staggered. In this way, the relay nodes will not receive and transmit at the same time in the same frequency band at any time, so there is no loopback self-interference problem.

In a communication system, data is assembled and transmitted in units of sub-frames. In the TDD system, there are three types of subframe structures: a downlink subframe (D), an uplink subframe (U), and a special subframe (S). For the base station, the downlink subframe is used to transmit data to the UE, and the uplink subframe is used to receive data from the UE or the relay node. The special subframe is used for the transition from the downlink subframe to the uplink subframe, including the downlink portion Dw, the guard time GP, and the uplink portion Up, wherein the lengths of the downlink portion Dw and the guard time GP are configurable. Above three The seed frames are combined in a certain order to form a timeline structure. All the downlink parts in the timeline structure, including the downlink subframe and the downlink part of the special subframe, are called a downlink timeline, and all uplink parts in the timeline structure include an uplink subframe and a special subframe. In the uplink part, the structure is called the uplink timeline.

In the TDD cellular network in which the relay node is deployed, after the downlink timeline of the cell in which the relay node is located reaches the relay node through the propagation delay, the relay node uses the arrival timeline as a reference, and on this basis, a period of time is advanced. As a downlink timeline of the relay node, the control data portion of the downlink subframe in the downlink subframe that is sent by the relay node to the UE and the control data portion in the downlink subframe when the base station delivers the relay relay are staggered, so that the relay can The control data of the UE it serves is sent out, and it can receive the control data given to it by the base station. However, after the downlink time line of the relay node is advanced, the control data part transmitted by the relay node and sent to the UE may be overlapped with the uplink receiving part reported by the base station receiving UE or other relays. Interference. Summary of the invention

In order to solve the problems of the prior art, embodiments of the present invention provide a method, base station, and system for transmitting data. The technical solution is as follows:

A method for transmitting data according to an embodiment of the present invention, where the method includes:

In a time division duplex network, for a cell that deploys a relay node, the base station of the cell uses the initial timeline of the network as a reference to maintain an uplink subframe and a special subframe uplink of the timeline of the cell. Partially unchanged, reconfiguring the length of the guard time in the special subframe of the timeline of the cell, and delaying the cell with reference to the downlink subframe of the initial timeline of the network and the downlink part of the special subframe Reconfiguring the downlink subframe of the timeline after the guard time and the downlink part of the special subframe to obtain a new timeline of the cell;

The base station performs data transmission with the user equipment or the relay node according to the new timeline. The embodiment of the present invention further provides a base station, which is located in a time division duplex network, and a relay node is disposed in a cell served by the base station, where the base station includes: a processing module, configured to keep the uplink subframe of the timeline of the cell and the uplink component of the special subframe unchanged according to the initial timeline of the network, and reconfigure the special subframe of the timeline of the cell Length of the guard time, and delaying the downlink subframe of the timeline after the reconfiguration guard time of the cell and the special subframe by referring to the downlink subframe of the initial timeline of the network and the downlink part of the special subframe In the downlink part, the new timeline of the cell is obtained;

And a sending module, configured to perform data transmission with the user equipment or the relay node according to the new timeline.

The embodiment of the present invention further provides a system for transmitting data, where the system is located in a time division duplex network, including: a base station and a relay node, and the relay node is deployed in a cell served by the base station; The base station is configured to keep the uplink subframe of the timeline of the cell and the uplink component of the special subframe unchanged, and reconfigure the special subframe of the timeline of the cell, with reference to the initial timeline of the network. Length of the guard time, and referring to the downlink subframe of the initial timeline of the network and the downlink part of the special subframe, delaying the downlink subframe and the special subframe of the timeline after the reconfiguration protection time of the cell a downlink part of the frame, where a new timeline of the cell is obtained; and is further configured to perform data transmission with the user equipment or the relay node according to the new timeline;

The relay node is configured to: when the downlink part of the new timeline of the base station propagates to the relay node, refer to the downlink part arrival time as a reference, and the time specified in advance as the time of the relay node. The position of the downlink portion of the line is such that the control data portion in the downlink subframe of the timeline of the relay node and the control data portion in the downlink subframe of the new timeline of the base station arrive at the relay node The overlap is also used for data transmission with the base station or user equipment according to a timeline after a predetermined time.

The embodiment of the present invention further provides a method for transmitting data in a time division duplex network, where the network has an initial timeline, and the method includes:

The base station of the cell in which the relay node is deployed performs data transmission with a new time line, and the downlink subframe of the new time line is delayed by one delay amount from the downlink subframe of the initial time line, and the special sub-line of the new time line The downlink portion of the frame is shorter than the downlink portion of the special subframe of the initial timeline, the guard time of the new timeline, the uplink portion of the special subframe, and the uplink subframe are respectively associated with the initial timeline The guard time, the uplink portion of the special subframe, and the uplink subframe are aligned; wherein, when the number of the relay nodes is one, the delay is at least (Tc+T -2 x Tp); When the number of the relay nodes is multiple, the delay amount is at least the maximum value of each of the relay nodes according to (Tc+T -2 x Tp), and Tc is the relay node. a length of a control data portion in a downlink subframe, where τ is a transition time of the relay node transitioning from a transmitting state to a receiving state, where Τρ is a propagation time of a base station of the cell in which the relay node is deployed to the relay node Delay.

The embodiment of the present invention achieves the purpose of eliminating interference by adjusting the time line of the cell in which the relay node is deployed, and does not need to adjust the timeline of the cell in which the relay node is not deployed, thereby avoiding all cells in the network. The timeline is adjusted, which greatly saves resources, avoids waste of resources, and reduces maintenance costs and complexity. DRAWINGS

1 is a schematic diagram of a timeline structure provided by an embodiment of the present invention;

2 is a flowchart of a method for transmitting data according to an embodiment of the present invention;

3 is a schematic diagram of time line alignment of two cells according to an embodiment of the present invention;

6 is a structural diagram of a base station according to an embodiment of the present invention;

FIG. 7 is a structural diagram of a transmission data system according to an embodiment of the present invention. detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

The time line in the embodiment of the present invention is as shown in FIG. 1 , and includes a downlink subframe D, a special subframe S, and an upper Line subframe U. Among them, one downlink subframe can be divided into two parts in time, the front part is the control data part, the figure shows the cross shadow part, the latter part is the downlink service data part, and the figure shows the blank part in D. The special subframe can be divided into three parts, and the previous part is the downlink part Dw, including the downlink control data part and the downlink service data part, and has the same structure as the downlink subframe, the middle part is a protection time GP, and the latter part is the uplink part Up. A special subframe is required when going from the downlink subframe to the uplink subframe. The length of the uplink part of the special subframe is relatively fixed. The length of the downlink part and the guard time can be adjusted to each other. The sum of the lengths of the two subframes is the total length of the special subframe minus the length of the uplink part. The interval between any two uplink subframes or the start position of the downlink subframe is the length of an integer number of subframes; there is no gap between the consecutive downlink subframes and the downlink portion of the special subframe, and consecutive uplink subframes and special subframes There is no gap between the upstream parts of the frame.

Referring to FIG. 2, an embodiment of the present invention provides a method for transmitting data, including:

201: In a TDD network, for a cell that deploys a relay node, the base station of the cell uses the initial timeline of the TDD network as a reference, and keeps the uplink subframe of the timeline of the cell and the uplink component of the special subframe unchanged. Reconfiguring the length of the guard time in the special subframe of the timeline of the cell, and referring to the downlink subframe of the initial timeline of the TDD network and the downlink part of the special subframe, delaying the reconfiguration protection time of the cell The downlink subframe of the timeline and the downlink part of the special subframe obtain a new timeline of the cell.

The initial timeline in the embodiment of the present invention refers to the same timeline set for all cells when the TDD network is initially. The length of the guard time GP of the special subframe has been configured in the initial timeline. If no relay node is deployed in the TDD network, the timelines of all cells are absolute time aligned, that is, from the natural time, the boundaries of each subframe in all cells are aligned, and both are downlink subframes. , or both are uplink subframes, or they are all special subframes. As shown in FIG. 3, the timelines of cell A and cell B are aligned in absolute time. Otherwise, if the cell A is the uplink part and the cell B is the downlink part at the same time, the cell A will simultaneously receive the terminal uplink data of the own cell and the downlink data of the cell B base station, and the cell A only wants the uplink of the own cell terminal. Data, then the downlink of cell B Data can constitute interference.

The length configuration for the guard time GP is generally determined by the size of each cell, or equivalently by the distance between base stations corresponding to the two cells. The basic requirements are as follows: When the downlink data of the cell A is transmitted, including the downlink part and the downlink part of the special subframe, when the propagation delay reaches the cell B, the uplink data of the cell B cannot be received, including the uplink subframe and the special sub-frame. The upstream part of the frame has overlap, otherwise there is interference. It is assumed that the distance between the base station of the cell A and the base station of the cell B is L (meter), that is, the radius of each cell is about L/2 meters, and the propagation speed of the wireless electromagnetic wave is C=3.0 x 10 ⁸ m/s, then the guard time GP is at least It is L/C seconds. Generally, in order to improve resource utilization, the GP is preferably just enough to satisfy the interference, so that the downlink portion Dw of the special subframe is as long as possible for transmitting data.

202: The base station of the cell performs data transmission with the UE or the relay node according to the new timeline obtained above, where the transmission includes sending and receiving.

The foregoing method achieves the purpose of eliminating interference by performing timeline adjustment on the cell in which the relay node is deployed, and does not need to adjust the timeline of the cell in which the relay node is not deployed, thereby avoiding all the cells in the network. Adjustment of the timeline greatly saves resources, avoids waste of resources, and reduces maintenance costs and complexity.

In the foregoing method, specifically, 201 may be implemented as follows: reconfiguring the guard time GP and delaying the downlink subframe of the time line after the reconfiguration guard time of the cell and the downlink part in the special subframe, so that the new part of the cell When the downlink subframe of the time line and the downlink portion of the special subframe reach the neighboring cell through the delay, the uplink subframe of the time line of the neighboring cell and the uplink component of the special subframe do not overlap, and the adjacent cell is When the downlink subframe of the timeline and the downlink part of the special subframe arrive at the cell through the delay, the uplink subframe of the new timeline of the cell and the uplink component of the special subframe do not overlap, and the timeline of the relay node is also made. When the downlink control data portion in the downlink subframe arrives at the cell through the delay, it does not overlap with the uplink subframe of the new timeline of the cell and the uplink portion of the special subframe.

Referring to FIG. 4, the method for transmitting data provided by the embodiment of the present invention may specifically include:

401: For a cell in which a relay node is deployed in a TDD network, the base of the cell in which the relay node is deployed The station uses the initial timeline of the TDD network as a reference, and keeps the uplink subframe of the timeline of the cell in which the relay node is deployed and the uplink component of the special subframe unchanged, and reconfigures the timeline of the cell in which the relay node is deployed. The length of the guard time in the special subframe, and the downlink subframe of the initial time line of the TDD network and the downlink part of the special subframe are referenced, delaying the time after the reconfiguration protection time of the cell in which the relay node is deployed The downlink subframe of the line and the downlink part of the special subframe obtain a new timeline of the cell that is deployed to the relay node, so that the downlink subframe and the special subframe of the new timeline of the cell in which the relay node is deployed When the downlink part arrives at the neighboring cell through the delay, the uplink subframe of the time line of the neighboring cell and the uplink part of the special subframe do not overlap, and the downlink subframe and the special subframe of the time line of the neighboring cell are made. When the downlink part reaches the cell of the relaying node through the delay, the uplink subframe of the new timeline of the cell in which the relay node is deployed does not overlap with the uplink component of the special subframe, and When the downlink control data portion in the downlink subframe of the timeline of the node arrives at the cell of the relaying relay node by the delay, the uplink subframe and the special subframe of the new timeline of the cell in which the relay node is deployed The upstream parts do not overlap.

The initial timeline of the TDD network is usually preset, and the length of the guard time GP of the special subframe in which the initial timeline packet is set is set. Specifically, refer to the TDD initial network timeline in Figure 5, which is the timeline structure of the first row. Typically, the timeline absolute time of all cells in the TDD network is initially aligned.

In this embodiment, specifically, the length of the guard time GP is extended, that is, the length of the downlink portion Dw in the special subframe is shortened, and the sum of the lengths of the GP and the Dw is unchanged, as shown in FIG. The timeline after the Dw/GP is reconfigured in the cell, that is, the timeline structure of the second row.

Preferably, the length of the guard time GP in the special subframe configuring the time line of the cell is at least: ( Tc + τ -2 X Tp + L / C ) seconds; wherein Tc is the control data in the downlink subframe of the relay node The length of the part, τ is the transition time of the relay node from the transmission state to the reception state, and Τρ is the propagation delay of the base station to the relay node of the cell. L is the distance between the base station of one cell and the base station of another cell, in meters, C is the propagation speed of the wireless electromagnetic wave, and C = 3.0 x 10 ⁸ m / sec. Time τ For the sake of hardware, the relay node cannot switch from the transmission state to the reception state immediately, and a certain conversion time is required. Therefore, the time is extended to allow the relay node to perform the transmission state transition for a corresponding time. In the present embodiment, τ is a number greater than 0. With the development of the technology, the value of τ can reach 0. When τ is 0, it is still applicable to the technical solution in the embodiment of the present invention. On the premise that the frame is unchanged, delaying the downlink part of the downlink subframe and the special subframe causes the GP to be too short.

In this embodiment, when there are multiple relay nodes deployed by the cell, a time value is calculated for each of the multiple relay nodes according to the formula: (Tc+T -2 x Τρ ) seconds. A maximum value is selected among all the obtained time values, and the downlink subframe of the time line of the cell and the downlink portion of the special subframe are delayed at least by the maximum value.

Preferably, the downlink subframe of the timeline after delaying the reconfiguration guard time of the cell and the downlink component of the special subframe are at least (Tc+ τ -2 X Τρ ) seconds; wherein Tc is a downlink subframe of the relay node The length of the control data portion, τ is the transition time of the relay node from the transmission state to the reception state, and Τρ is the propagation delay of the base station to the relay node of the cell. Specifically, reference may be made to the timeline structure after the cell of the relay node in FIG. 5 is fixed with the uplink time and the downlink time is delayed, that is, the structure of the third line time line in the figure. In the figure, the case where the delay amount does not consider Τρ is described. At this time, Tp=0, Up and U remain unchanged, and each D and Dw are delayed backward. Therefore, the first D and Dw in the figure are delayed. After that, the length of the GP in the special sub-frame is shortened, and the GP of the shaded portion of the left oblique line is displayed in the figure. Accordingly, after the delay of the D sub-frame immediately following the U sub-frame, the corresponding GP is left in front of the sub-frame. The figure shows the GP in the shaded portion to the right, and the sum of the lengths of the two GPs is equal to the length of the GP (GP in the second line) before the delay.

In this embodiment, when there are multiple relay nodes deployed in the foregoing cell, calculation is performed for each of the plurality of relay nodes according to the formula: (Tc+ τ -2 Tp+L/C) seconds. A time value, the maximum value is selected among all the obtained time values, and the time line of the cell after the reconfiguration protection time is The length of the guard time in the special subframe is at least the maximum.

402: The base station of the cell performs data transmission with the UE or the relay node according to the new timeline, and the transmission includes sending and receiving.

In this embodiment, since the relay node is placed in the above cell, the cell serving as the base station identity by the relay node also has its own timeline. At this point, its timeline can no longer be aligned with the timeline of its base station, because it is the identity of the UE for the base station it is in. Moreover, the relay node first needs to complete the control data part of the downlink subframe of the own cell to the UE it serves in the downlink subframe of the own cell, and then complete the data sent by the receiving base station to the UE, including the control data part and The service data portion, so the control data portion of the relay node needs to be staggered from the control data portion of the base station. Therefore, the method may further include:

403: After the downlink part of the new timeline of the base station of the foregoing cell reaches the relay node, the relay node takes the downlink part arrival time as a reference, and the time specified in advance is used as the downlink part of the timeline of the relay node. Position, obtaining a new timeline of the relay node, such that the control data portion in the downlink subframe of the timeline of the relay node does not overlap with the control data portion in the downlink subframe of the new timeline of the base station after reaching the relay node, Further, the relay node performs data transmission with the above base station and the UE according to its own new timeline, and the transmission includes receiving and transmitting.

Specifically, referring to FIG. 5, the timeline structure of the fourth row is the base station of the cell in which the relay node is deployed, and after the data is transmitted according to the new timeline, the result of the new timeline reaching the relay node is due to the transmission process. There is a delay in the middle, so the new timeline will be extended backwards for a while. The fifth line timeline structure in the figure is a new timeline obtained after the relay node advances the downlink part. Since the relay node takes the arrival time of the downlink time of the new timeline of the base station as a reference, it can be seen from the figure that The new timeline of the fifth row of relay nodes in the figure is advanced for a period of time compared to the result of the new timeline of the fourth row of base stations in the figure arriving at the relay node. By this advancement, the control data portion in the downlink subframe of the timeline of the relay node does not overlap with the control data portion in the downlink subframe of the timeline of the base station.

In this embodiment, the application scenario may also be LTE (Long Term Evolution, 3 GPP long-term). Evolution) / LTE-A (Long Term Evolution Advanced) TDD network, in which one subframe has a length of 1 millisecond and is composed of 14 OFDM (Orthogonal Frequency Division Multiplexing) Made up of symbols. The values of Dw, GP, and Up of the special subframe are specifically an integer number of symbol lengths. In addition, the subframe control data portion of the relay node receiving the base station data has a length of one or two symbols. It is assumed that the maximum length of the control data portion in the subframe used by all the relay nodes in the cell to receive the base station data is k (k=l, 2) symbols, and the base station spacing of the two cells in the TDD network is L meters, then the preference is The total length of the GP reconfigured by the cell is at least k symbol lengths + τ + L / C seconds, where τ is the transition time of the relay node from the transmitting state to the receiving state, and C is the propagation speed of the wireless electromagnetic wave. And C = 3.0 X 10 ⁸ m / sec.

The foregoing method provided in this embodiment achieves the purpose of eliminating interference by performing timeline adjustment on a cell in which a relay node is deployed, and does not need to adjust a timeline of a cell in which a relay node is not deployed, thereby avoiding The timeline of all the cells is adjusted, which greatly saves resources, avoids waste of resources, reduces maintenance cost and complexity, and is simple and easy to implement. For a cell that does not have a relay node, there is no need to adjust the timeline of the cell, and the timeline of the cell without the relay node can be left unaffected, so that these cells have no resource waste, and the overall network maintenance complexity is reduced. By extending the length of the GP, it is possible to prevent the GP from being too short due to the extension of the downlink portion and the downlink portion of the special subframe without changing the uplink portion and the uplink subframe of the special subframe. The cell delays the downlink part of the downlink subframe and the special subframe, so that when the control data part of the downlink subframe transmitted by the relay node arrives at the base station, it does not overlap with the uplink receiving part of the base station, thereby avoiding interference. After the relay node advances the downlink portion, the control data portion in the downlink subframe of the timeline of the relay node does not overlap with the control data portion in the downlink subframe of the timeline of the base station to avoid interference. Referring to FIG. 6, an embodiment of the present invention further provides a base station, which is located in a TDD network, and a relay node is disposed in a cell served by the base station, and the base station includes:

The processing module 601 is configured to use the initial timeline of the TDD network as a reference to maintain the time of the cell. The uplink subframe of the inter-line and the uplink of the special subframe are unchanged, and the length of the guard time in the special subframe of the timeline of the cell is reconfigured, and the downlink subframe and the special subframe in the initial timeline of the TDD network are used. The downlink part is a reference, delaying the downlink subframe of the time line after the reconfiguration protection time of the cell and the downlink part of the special subframe, to obtain a new timeline of the cell;

The sending module 602 is configured to perform data transmission with the UE or the foregoing relay node according to the new timeline obtained by the processing module 601. Wherein, the transmission includes receiving and transmitting.

In this embodiment, in the first implementation manner, the processing module 601 can be used to:

Delaying the downlink subframe of the time line after the reconfiguration guard time of the cell and the downlink part of the special subframe to at least ( Tc + τ -2 Tp ) seconds; and / or,

The length of the guard time in the special subframe configuring the time line of the cell is at least: ( Tc + τ -2 X Tp + L / C ) seconds;

Where Tc is the length of the control data portion in the downlink subframe of the relay node, τ is the transition time of the relay node transitioning from the transmission state to the reception state, and Tp is the propagation delay of the base station to the relay node of the cell, L The distance between the base station of one cell and the base station of another cell, in meters, C is the propagation speed of wireless electromagnetic waves, and C = 3.0 x 10 ⁸ m / sec.

In this embodiment, in the second implementation manner, the processing module 601 can be used to:

When there are multiple relay nodes deployed in the cell, a time value is calculated for each relay node according to (Tc+T -2 x Tp) seconds, and the maximum value is selected among all the obtained time values, and the cell is selected. The downlink subframe of the timeline after the reconfiguration protection time and the downlink component of the special subframe are delayed by at least the maximum value; and/or,

When there are multiple relay nodes deployed in the cell, calculate a time value for each relay node according to (Tc+ τ -2 X Tp+L/C ) seconds, and select the maximum value among all the obtained time values. And delaying the length of the guard time in the special subframe of the timeline of the cell by at least the maximum value;

Where Tc is the length of the control data portion in the downlink subframe of the relay node, τ is the transition time of the relay node transitioning from the transmission state to the reception state, and Tp is the base station to the relay node of the cell. Broadcast delay, L is the distance between the base station of one cell and the base station of another cell, in meters, C is the propagation speed of wireless electromagnetic waves, and C = 3.0 x 10 ⁸ m / sec.

In this embodiment, the processing module 601 is specifically configured to use the initial timeline of the TDD network as a reference, and keep the uplink subframe of the timeline of the cell and the uplink component of the special subframe unchanged, and reconfigure the special timeline of the cell. The length of the guard time in the subframe, and the downlink subframe of the initial timeline of the TDD network and the downlink part of the special subframe are referenced, delaying the downlink subframe and the special subframe of the timeline after the reconfiguration protection time of the cell The downlink part of the frame obtains a new timeline of the cell, so that the downlink subframe of the new timeline of the cell and the downlink part of the special subframe reach the neighboring cell through the delay, and the timeline of the neighboring cell The uplink part of the uplink subframe and the special subframe do not overlap, and the downlink subframe of the time line of the neighboring cell and the downlink part of the special subframe arrive at the cell through the delay, and the uplink of the new timeline of the cell The uplink portion of the frame and the special subframe does not overlap, and the downlink control data portion in the downlink subframe of the time line of the relay node is delayed by the delay. Time zone, does not overlap with the upstream portion of the uplink subframe and special subframe new time line for the cell.

The base station provided by the embodiment provides the purpose of eliminating interference by adjusting the time line of the cell in which the relay node is deployed, and does not need to adjust the timeline of the cell in which the relay node is not deployed, thereby avoiding the network. The timeline of all the cells is adjusted, which greatly saves resources, avoids waste of resources, reduces maintenance cost and complexity, and is simple and easy to implement. For a cell that does not have a relay node, there is no need to adjust the timeline of the cell, and the timeline of the cell without the relay node can be left unaffected, so that these cells have no resource waste, and the overall network maintenance complexity is reduced. By extending the length of the GP, it is possible to prevent the GP from being too short due to the extension of the downlink portion and the downlink portion of the special subframe under the premise that the uplink portion and the uplink subframe of the special subframe are unchanged. The cell delays the downlink part of the downlink subframe and the special subframe, so that when the control data part of the downlink subframe sent by the relay node propagates to the base station, it does not overlap with the uplink receiving part of the base station, thereby avoiding interference. Referring to FIG. 7, an embodiment of the present invention further provides a system for transmitting data, including: a base station 701 And relay node 702;

The base station 701 is configured to: in the TDD network, for the cell that deploys the relay node 702, with the initial timeline of the TDD network as a reference, keep the uplink subframe of the timeline of the cell and the uplink component of the special subframe unchanged, Reconfiguring the length of the guard time in the special subframe of the timeline of the cell, and referring to the downlink subframe of the initial timeline of the TDD network and the downlink part of the special subframe, delaying the reconfiguration protection time of the cell The downlink subframe of the time line and the downlink part of the special subframe obtain a new timeline of the cell; and is also used for data transmission with the UE or the relay node 702 according to the new timeline;

The relay node 702 is configured to: in the TDD network, when the downlink part of the new timeline of the base station 701 reaches the relay node 702, the time specified in advance is used as the reference time of the downlink part, and the time specified in advance is used as the time of the relay node 702. The position of the downlink portion of the line is such that the control data portion of the downlink subframe of the timeline of the relay node 702 does not overlap with the control data portion of the downlink subframe of the new timeline of the base station 701 after reaching the relay node. It is used for data transmission with the base station 701 or UE according to the timeline after the specified time in advance.

In this embodiment, the foregoing transmission includes receiving and transmitting.

In this embodiment, the base station 701 is configured to maintain, in the TDD network, the timeline of the cell that deploys the relay node, with reference to the initial timeline of the TDD network, for the cell that deploys the relay node 702. The uplink part of the uplink subframe and the special subframe are unchanged, and the length of the guard time in the special subframe of the time line of the cell in which the relay node is deployed is reconfigured, and the downlink subframe of the initial time line of the TDD network and the special The downlink part in the subframe is a reference, delaying the downlink subframe of the timeline after the reconfiguration protection time of the cell in which the relay node is deployed, and the downlink part in the special subframe, to obtain a new timeline of the cell, so that the cloth When the downlink subframe of the new timeline of the cell in which the relay node is placed and the downlink component of the special subframe reach the neighboring cell through the delay, the uplink subframe of the timeline of the neighboring cell and the uplink component of the special subframe are not Overlapping, and causing the downlink subframe of the time line of the neighboring cell and the downlink portion of the special subframe to reach the cell of the relaying relay node by delay, and on the new timeline of the cell The uplink part of the row subframe and the special subframe do not overlap, and the downlink control data part in the downlink subframe of the timeline of the relay node 702 is delayed by the time delay to reach the cell of the relaying relay node. The uplink subframe of the new timeline of the cell of the relay node does not overlap with the uplink subframe of the special subframe.

The base station 701 in this embodiment also has all the functions of the base station in the foregoing embodiment, and details are not described herein again.

The system provided in this embodiment achieves the purpose of eliminating interference by adjusting the timeline of the cell in which the relay node is deployed, and does not need to adjust the timeline of the cell where the relay node is not deployed, thereby avoiding the network. The timeline of all the cells is adjusted, which greatly saves resources, avoids waste of resources, reduces maintenance cost and complexity, and is simple and easy to implement. For a cell that does not have a relay node, there is no need to adjust the timeline of the cell, and the timeline of the cell without the relay node can be left unaffected, so that these cells have no resource waste, and the overall network maintenance complexity is reduced. By extending the length of the GP, it is possible to prevent the GP from being too short due to the extension of the downlink portion and the downlink portion of the special subframe without changing the uplink portion and the uplink subframe of the special subframe. The cell delays the downlink part of the downlink subframe and the special subframe, so that when the control data part of the downlink subframe transmitted by the relay node arrives at the base station, it does not overlap with the uplink receiving part of the base station, thereby avoiding interference. After the relay node advances the downlink portion, the control data portion in the downlink subframe of the timeline of the relay node does not overlap with the control data portion in the downlink subframe of the timeline of the base station to avoid interference. Finally, it should be noted that those skilled in the art can understand that all or part of the process of implementing the above embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable. In the storage medium, the program, when executed, may include the flow of an embodiment of the methods as described above. The storage medium may be a magnetic disk, an optical disk, a read only memory (ROM) or a random access memory (RAM).

Each functional unit in the embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. Above integration The module can be implemented in the form of hardware or in the form of a software function module. The integrated modules, if implemented in the form of software functional modules and sold or used as stand-alone products, may also be stored in a computer readable storage medium. The above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like. Each of the above described devices or systems may perform the methods of the corresponding method embodiments.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

Rights request

A method for transmitting data, the method comprising:

The base station performs data transmission with the user equipment or the relay node according to the new timeline.

The method according to claim 1, wherein the delaying the downlink subframe of the timeline after the reconfiguration protection time of the cell and the downlink component of the special subframe are: delaying the cell Reconfiguring the downlink subframe of the timeline after the guard time and the downlink portion of the special subframe at least (Tc+ τ -2 X Tp );

Where Tc is the length of the control data portion in the downlink subframe of the relay node, τ is the transition time of the relay node transitioning from the transmission state to the reception state, and Tp is the base station of the cell to the relay The propagation delay of the node.

The method according to claim 1, wherein the downlink subframe of the timeline after delaying the reconfiguration protection time of the cell and the downlink component of the special subframe are specifically: when the cell When there are multiple relay nodes, a time value is calculated for each relay node according to the (Tc+T -2 x Tp ), and a maximum value is selected among all the obtained time values, the cell Reconfiguring the downlink subframe of the time line after the guard time and the downlink portion of the special subframe at least delay the maximum value;

Where Tc is the length of the control data portion in the downlink subframe of the relay node, τ is the transition time of the relay node transitioning from the transmission state to the reception state, and Tp is the base station to the cell of the cell The propagation delay of the relay node.

The method according to claim 1, wherein the length of the guard time in the special subframe of the timeline for reconfiguring the cell is specifically:

The length of the guard time in the special subframe configuring the time line of the cell is at least: ( Tc + τ -2 x Tp+L/C );

Where Tc is the length of the control data portion in the downlink subframe of the relay node, τ is the transition time of the relay node transitioning from the transmitting state to the receiving state, and Τρ is the base station of the cell to the relay The propagation delay of the node, L is the distance between the base station of one cell and the base station of another cell, and C is the propagation speed of the wireless electromagnetic wave.

When the number of relay nodes deployed by the cell is multiple, a time value is calculated for each relay node according to the (Tc+T -2 x Tp+L/C), and selected among all the obtained time values. The maximum value, the length of the guard time in the special subframe of the timeline of the cell is at least the maximum value;

The method according to any one of claims 1 to 5, wherein the base station of the cell keeps an uplink subframe of the timeline of the cell with reference to an initial timeline of the network. The uplink part of the special subframe is unchanged, and the length of the guard time in the special subframe of the time line of the cell is reconfigured, and the downlink subframe of the initial time line of the network and the downlink part of the special subframe are used as reference. Delaying the downlink subframe of the timeline after the reconfiguration protection time of the cell and the special The downlink part of the special subframe obtains a new timeline of the cell, which is specifically:

The base station of the cell in which the relay node is deployed is referenced to the initial time line of the network, and the uplink subframe of the time line of the cell in which the relay node is deployed and the uplink part of the special subframe are kept unchanged. And configuring a length of the guard time in the special subframe of the timeline of the cell in which the relay node is deployed, and delaying the downlink subframe in the initial timeline of the network and the downlink component in the special subframe as reference A downlink time frame of the time line after the reconfiguration of the cell of the relay node and a downlink part of the special subframe are used to obtain a new time line of the cell in which the relay node is deployed, so that the deployment is performed When the downlink subframe of the new timeline of the cell of the node and the downlink part of the special subframe reach the neighboring cell through the delay, the uplink subframe of the timeline of the neighboring cell and the uplink component of the special subframe do not overlap. And causing the downlink subframe of the time line of the neighboring cell and the downlink part of the special subframe to reach the cell of the relaying relay node by using a delay, and the cell that deploys the relay node The uplink subframe of the new timeline does not overlap with the uplink component of the special subframe, and the downlink control data part in the downlink subframe of the timeline of the relay node is delayed to reach the cell of the deployment relay node by using a delay. At the time, the uplink subframe of the new timeline of the cell in which the relay node is deployed and the uplink portion of the special subframe do not overlap.

A base station, characterized in that: in a time division duplex network, a relay node is disposed in a cell served by the base station, and the base station includes:

a processing module, configured to keep the uplink subframe of the timeline of the cell and the uplink component of the special subframe unchanged according to the initial timeline of the network, and reconfigure the special subframe of the timeline of the cell Length of the guard time, and delaying the downlink subframe of the timeline after the reconfiguration guard time of the cell and the special subframe by referring to the downlink subframe of the initial timeline of the network and the downlink part of the special subframe In the downlink part, the new timeline of the cell is obtained;

The base station according to claim 7, wherein the processing module is configured to reconfigure The length of the guard time in the special subframe of the timeline of the cell includes:

The processing module is configured to reconfigure the length of the guard time in the special subframe of the timeline of the cell to be at least: (Tc+ τ -2 X Tp+L/C ); and/or

The downlink subframe of the timeline after delaying the reconfiguration guard time of the cell and the downlink part of the special subframe include:

The processing module is configured to delay the downlink subframe of the timeline after the reconfiguration protection time of the cell and the downlink component of the special subframe to at least (Tc+ τ -2 X Tp );

Where Tc is the length of the control data portion in the downlink subframe of the relay node, τ is the transition time of the relay node transitioning from the transmission state to the reception state, and Tp is the base station of the cell to the relay The propagation delay of the node, L is the distance between the base station of one cell and the base station of another cell, and C is the propagation speed of the wireless electromagnetic wave.

The base station according to claim 7, wherein the length of the guard time in the special subframe used by the processing module to reconfigure the timeline of the cell includes:

The processing module is configured to calculate a time value for each relay node according to (TC+T-2 Tp+L/C) when there are multiple relay nodes deployed by the cell, and obtain all time values. Selecting a maximum value, wherein the length of the guard time in the special subframe of the timeline of the cell is at least the maximum value; and/or

The processing module is configured to calculate a time value for each relay node according to (TC+T -2 x Tp ) when the number of relay nodes deployed by the cell is multiple, and select one of all obtained time values. a maximum value, where the downlink subframe of the time line after the reconfiguration protection time of the cell and the downlink part of the special subframe are delayed by at least the maximum value;

Where Tc is the length of the control data portion in the downlink subframe of the relay node, τ is the transition time of the relay node transitioning from the transmission state to the reception state, and Tp is the base station to the cell of the cell The propagation delay of the relay node, L is the distance between the base station of one cell and the base station of another cell, and C is the propagation speed of the wireless electromagnetic wave.

The base station according to claim 7, wherein the processing module is configured to maintain an uplink subframe of a timeline of the cell in which the relay node is deployed, with reference to an initial timeline of the network. And the uplink part of the special subframe is unchanged, and the length of the guard time in the special subframe of the timeline of the cell in which the relay node is deployed is reconfigured, and the downlink subframe and the special sub-frame of the initial time line of the network are used. The downlink part in the frame is a reference, delaying the downlink subframe of the time line after the reconfiguration protection time of the cell in which the relay node is deployed, and the downlink part in the special subframe, and obtaining the cell of the deployment relay node a new timeline, such that the downlink subframe of the new timeline of the cell in which the relay node is deployed and the downlink component of the special subframe reach the neighboring cell through the delay, and the uplink of the timeline of the neighboring cell The uplink portion of the subframe and the special subframe do not overlap, and the downlink subframe of the time line of the neighboring cell and the downlink portion of the special subframe are caused to reach the small size of the deployment relay node by delay. In the time zone, the uplink subframe of the new timeline of the cell in which the relay node is deployed and the uplink component of the special subframe do not overlap, and the downlink control data in the downlink subframe of the timeline of the relay node is also caused. When the time delay reaches the cell of the relaying node, the uplink subframe of the new timeline of the cell in which the relay node is deployed and the uplink component of the special subframe do not overlap.

A system for transmitting data, characterized in that the system is located in a time division duplex network, comprising: a base station and a relay node, and the relay node is placed in a cell served by the base station;

The base station is configured to keep the uplink subframe of the timeline of the cell and the uplink component of the special subframe unchanged, and reconfigure the special subframe of the timeline of the cell, with reference to the initial timeline of the network. Length of the guard time, and referring to the downlink subframe of the initial timeline of the network and the downlink part of the special subframe, delaying the downlink subframe and the special subframe of the timeline after the reconfiguration protection time of the cell a downlink part of the frame, where a new timeline of the cell is obtained; and is further configured to perform data transmission with the user equipment or the relay node according to the new timeline; The relay node is configured to: when the downlink part of the new timeline of the base station propagates to the relay node, refer to the downlink part arrival time as a reference, and the time specified in advance as the time of the relay node. The position of the downlink portion of the line is such that the control data portion in the downlink subframe of the timeline of the relay node and the control data portion in the downlink subframe of the new timeline of the base station arrive at the relay node The overlap is also used for data transmission with the base station or user equipment according to a timeline after a predetermined time.

12. A method of transmitting data in a time division duplex network, the network having an initial timeline, wherein the method comprises:

The base station of the cell in which the relay node is deployed performs data transmission with a new time line, and the downlink subframe of the new time line is delayed by one delay amount from the downlink subframe of the initial time line, and the special subframe of the new time line The downlink portion is shorter than the downlink portion of the special subframe of the initial timeline, and the protection time of the new timeline, the uplink portion of the special subframe, and the uplink subframe are respectively protected from the initial timeline. The time, the uplink portion of the special subframe, and the uplink subframe are aligned; wherein, when the number of the relay nodes is one, the delay is at least (Tc+T -2 x Tp); When the number of the relay nodes is multiple, the delay amount is at least the maximum value of each relay node according to (Tc+ τ -2 Tp ), and Tc is the downlink of the relay node. The length of the control data portion in the frame, τ is the transition time of the relay node from the transmission state to the reception state, and Tp is the propagation delay of the base station of the cell in which the relay node is deployed to the relay node.

13. The method according to claim 12, wherein the initial timeline is a timeline of a base station of a cell without a relay node.