WO2015113267A1

WO2015113267A1 - Method and device for determining transmitting time and receiving time of signals and communication system

Info

Publication number: WO2015113267A1
Application number: PCT/CN2014/071787
Authority: WO
Inventors: 徐月巧; 王轶; 李宏超; 周华
Original assignee: 富士通株式会社; 徐月巧; 王轶; 李宏超; 周华
Priority date: 2014-01-29
Filing date: 2014-01-29
Publication date: 2015-08-06

Abstract

A device for determining transmitting time and receiving time of signals, comprising a time determining unit. The time determining unit is used for determining, according to selected device-to-device (D2D) resources for transmitting signals or monitoring signals, the time for transmitting or receiving D2D signals. By means of the device, the interference between D2D signals and CUE signals can be alleviated.

Description

Method, device and communication system for determining signal transmission time and reception time

The present invention relates to the field of communications, and in particular, to a method, an apparatus, and a communication system for determining a signal transmission time and a reception time. Background technique

At present, 3GPP AN has passed the research project (Study Item, SI) of Device-to-Device (D2D) researched in LTE system, aiming to evaluate geographically adjacent devices in Long Term Evolution (LTE) systems. Service between devices. D2D operations include D2D Discovery and D2D Communication.

D2D discovery is divided into two types: Type 1 (Typel) and Type 2 (Type2).

Typel: The resources used for D2D discovery signals are allocated by Non-UE specific, and the resources may be shared by all user equipments (UEs) or shared by a group of users;

Type2: Resources for D2D discovery signals are user-specific (UE-specific) assigned. There are two cases in Type2: 1) Type 2A: The D2D discovery resource is allocated according to the event of each discovery signal; 2) Type 2B: The D2D discovery resource is semi-statically sustainable.

Currently, resources for D2D Discovery and D2D Communication are selected from the Resource Pool. The D2D user equipment (DUE) in the RRC idle (RRC_Idle) state also participates in the D2D operation, which indicates that the DUE of the RRC_Idle state can also be the D2D sender. In this case, the transmission timing (Transmit Timing, Tx Timing) of transmitting the D2D signal is based on the reception reception time (DL Receiving Timing) of the synchronization signal transmitted from the synchronization signal source such as the base station (eNB).

In the traditional cellular network, the uplink signal sent by all the cellular user equipments (CUEs) is based on the uplink receiving time, and the uplink clock advance is used to ensure the same Transmission Time Interval (TTI) scheduling. The uplink signals of all CUEs can reach the receiving end (such as an eNB) at the same time, ensuring subcarrier orthogonality between the uplink signals.

It should be noted that the above description of the technical background is only for the purpose of facilitating the clear and complete description of the technical solutions of the present invention, and is convenient for understanding by those skilled in the art. Can't just because these programs are in the hair The background of the prior art is set forth and it is believed that the above-described technical solutions are well known to those skilled in the art. Summary of the invention

In the D2D operation, since the D2D operation shares the uplink resources of the LTE cellular network, if the D2D signal and the traditional cellular user CUE signal do not arrive at the eNB at the same time, Inter-carrier Interference (ICI) of the signal between users will be caused. Inter-symbol Interference (ISI). In addition, when the legacy CUE (Legacy CUE) and the DUE transmit signals on the same resource, the problem of such ICI and ISI is more serious.

To solve the above problem, an embodiment of the present invention provides a method, a device, and a communication system for determining a signal transmission time and a reception time, which can alleviate interference between a D2D signal and a CUE signal.

A first aspect of the embodiments of the present invention provides an apparatus for determining a signal transmission time or a reception time, comprising: a time determination unit, the device for device (D2D) resource according to the selected transmission signal or the monitoring signal To determine when to send or receive a D2D signal.

A second aspect of the embodiments of the present invention provides a user equipment, wherein the user equipment includes the apparatus described in the first aspect.

A third aspect of the embodiments of the present invention provides a communication system, including a user equipment and a serving cell base station; wherein, the DUE determines a time for transmitting or receiving a D2D signal according to the selected device to device (D2D) resource of the transmitted signal or the monitored signal. .

The beneficial effects of the embodiments of the present invention are: determining the time for transmitting or receiving the D2D signal according to the device-to-device (D2D) resource of the selected transmission signal or the monitoring signal. Thereby, the interference between the D2D signal and the CUE signal can be alleviated.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which illustrate the manner in which the principles of the invention can be employed. It should be understood that the embodiments of the invention are not limited in scope. The embodiments of the present invention include many variations, modifications, and equivalents within the spirit and scope of the appended claims.

Features described and/or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with, or in place of, features in other embodiments. .

It should be emphasized that the term "comprising" or "comprising", when used herein, refers to the presence of a feature, component, step or component, but does not exclude the presence or addition of one or more other features, components, steps or components. DRAWINGS

The drawings are included to provide a further understanding of the embodiments of the invention, and are in the Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor. In the drawings: Figure 1 is a schematic diagram of a network architecture;

2 is a schematic diagram of interference caused by a D2D signal on a CUE signal;

3 is a schematic diagram of a CUE signal causing interference to a D2D signal;

4 is a flowchart of a method for determining a signal transmission time or a reception time according to Embodiment 3 of the present invention; FIG. 5 is a schematic diagram of a resource pool division according to Embodiment 2 of the present invention;

6 is a second schematic diagram of resource pool division according to Embodiment 2 of the present invention;

7 is a schematic diagram of a transmission time or a reception time of a signal and a monitoring signal transmitted by a 2D UE on a Resource Set1 according to an embodiment of the present invention;

8 is a schematic diagram of a transmission time or a reception time of a signal and a monitor signal transmitted by a 2D UE on a Resource Set 2 or 3 according to an embodiment of the present invention;

FIG. 9 is a block diagram showing a configuration of a device for determining a signal transmission time or a reception time according to Embodiment 6 of the present invention; FIG. 10 is a schematic diagram showing the structure of a time determining unit according to Embodiment 7 of the present invention;

11 is a schematic structural diagram of an embodiment of a user equipment according to Embodiment 8 of the present invention;

12 is a schematic diagram showing the structure of an embodiment of a synchronization signal source according to Embodiment 11 of the present invention; FIG. 13 is a schematic diagram showing the structure of a base station according to Embodiment 13 of the present invention;

Figure 14 is a diagram showing the topology of a communication system in accordance with Embodiment 12 of the present invention. detailed description

The foregoing and other features of the invention will be apparent from the The specific embodiments of the present invention are disclosed in the specification and the drawings, which illustrate the embodiments in which the principles of the invention may be employed, it is understood that the invention is not limited to the described embodiments, but instead The invention includes all modifications, variations and equivalents falling within the scope of the appended claims. Various embodiments of the present invention will be described below with reference to the accompanying drawings.

Firstly, an example is used to analyze the ISI impact of C2 signal caused by D2D signal in active technology and CUE. The ISI effect of the signal on the D2D signal.

Figure 1 is a schematic diagram of the network architecture. As shown in Figure 1, two DUEs and one CUE are located at the edge of the cell, and the distance between the three is similar. It can be assumed that the propagation delay (Propagation Delay) between the user and the user is zero. Moreover, the downlink reception time of the DUE and the CUE receiving the synchronization signal transmitted from the base station (eNB) is also the same, and the downlink reception time is T1.

Figure 2 is a schematic diagram of the D2D signal causing interference to the CUE signal. As shown in Figure 2, the CUE is in the connected state (RRC_Connected state) and has a valid Timing advance (TA) value, T2 = 2T1. In this way, the time for the CUE to send the uplink signal is D = 1^2. In the traditional cellular network system, all CUEs use the uplink clock advance based on the downlink receiving time, thereby ensuring all the same TTI scheduling. The uplink signal of the CUE arrives at the eNB at the same time, and does not cause ICI and ISI interference. However, DUE1 in the idle state (RRC_Idle state) cannot know a valid uplink clock advance. The DUE1 selects a resource from the resource pool to send a D2D signal, and the sending time is T1. At the same time, the CUE is scheduled to transmit an uplink signal. Since the DUE1 does not have a valid uplink clock advance, the time at which the D2D signal arrives at the eNB (2T1) is later than the time at which the CUE signal arrives at the eNB (0).

From the perspective of the receiving eNB, the arrival time difference between the D2D signal and the CUE signal can be as large as 2r/c, where r is the radius of the cell and c is the speed of light. In a system with a site spacing of 1732, the time difference is approximately 6.67us, which exceeds the length of the Normal Cyclic Prefix (Normal CP) of the existing LTE system. This indicates that when the CUE and the DUE simultaneously transmit signals, since the signal arrival time difference exceeds the CP, the orthogonality between the D2D signal and the subcarriers of the CUE signal is lost, thereby generating ICI and ISI, which greatly increases the receiving complexity of the eNB. . Especially when the DUE transmits the D2D signal with the maximum transmission power, the DUE causes more interference to the CUE signal.

The above is the interference caused by the D2D signal to the CUE signal from the perspective of the receiving eNB. Since the ICI and ISI interference caused by the non-orthogonality of the subcarriers are mutual, the interference caused by the CUE signal to the received D2D signal is seen from the receiving end DUE with reference to FIG. 3 below.

Figure 3 is a schematic diagram of the CUE signal causing interference to the D2D signal. As shown in Figure 3, the CUE signal arrives.

The time of DUE2 is -Tl, and the time when the D2D signal sent by DUE1 reaches DUE2 is T1. It can be seen that the interference signal source CUE signal arrives at DUE2 before the D2D signal sent by DUE1. The maximum arrival time difference between the CUE signal and the D2D signal arriving at DUE2 is 2r/c. In order to eliminate interference and demodulate the desired useful D2D signal, the receiving end DUE2 needs to advance its receiving window, and it takes up to 2T1 in advance. Based on the above analysis, the downlink receiving time of the D2D signal according to the DUE receiving the synchronization signal may cause the arrival time difference between the CUE signal and the D2D signal to exceed the conventional CP. This causes inter-subcarrier interference and inter-symbol interference of the user. From the perspective of the receiving end eNB, the D2D signal causes the eNB to receive interference of the CUE signal, which increases the complexity of the receiving end. In particular, all DUEs in the cell, whether in the idle (RRCJdle) state or in the RRC_Connected state, determine the transmission time (Tx timing) in the above manner or when the DUE selects the same resource block (RB) as the CUE. , the interference is even greater.

Therefore, in order to alleviate the interference between the D2D signal and the CUE signal, the embodiment of the present invention provides a method, an apparatus, and a communication system for determining a signal transmission time and a reception time. The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Example 1

Embodiment 1 of the present invention provides a method for determining a signal transmission time or a reception time, and FIG. 4 is a flowchart of the method. Referring to FIG. 4, the method includes:

Step 401: The DUE determines a time for transmitting or receiving the D2D signal according to the device-to-device (D2D) resource of the selected transmission signal or the monitoring signal.

In this embodiment, the D2D resource may be a resource divided according to a user state, or may be a resource type of a D2D discovery signal or a resource classified according to an inter-cell or intra-cell D2D discovery signal. For example, resources classified according to user status may be classified into resources used by connected users, resources used by idle users, resources used by connected users and idle users, or resources used in connected states, connected users, and Resources used by idle users; D2D discovery signal resource types can be divided into user-specific resources and non-user-specific resources.

In this embodiment, the synchronization signal source, such as the base station of the serving cell, may preset the mapping relationship between the D2D signal transmission or reception time and the D2D resource, and store the mapping relationship in the DUE, so that the DUE may be selected according to the selected The D2D resource determines the time at which the D2D signal is transmitted or received.

It can be known from the above method of the present embodiment that the D2D transmission time or the reception time changes according to the selected D2D resource change, thereby flexibly adjusting the D2D transmission or reception time to reduce the interference between the CUE signal and the D2D signal. Example 2 Embodiment 2 of the present invention provides a method for determining a signal transmission time or a reception time. Based on Embodiment 1, in this embodiment, a resource type divided according to a user state is taken as an example to describe how the DUE transmits or monitors according to the selected signal. The D2D resource of the signal determines the time at which the D2D signal is transmitted or received.

In this embodiment, when the resource is divided into a resource used by the connected state user, a resource used by the idle state user, and a resource commonly used by the connected state user and the idle state user, the selected resource is a resource used by the connected state user. The sending time is an uplink sending time of the user to send cellular data in the cellular network system. For example, in the FDD system, the sending time is an uplink clock advance time based on the downlink receiving time. In the TDD system, the time is The sending time is based on the downlink receiving time, and the uplink clock is advanced, and the time after the offset is generated;

When the resource selected by the DUE is the resource corresponding to the idle state user or the resource corresponding to the idle state and the connected state user, the sending time is the receiving time of the synchronization signal sent by the DUE receiving the synchronization signal source.

The resource for monitoring the D2D signal selected by the DUE is used by the connected user when the resource is divided into a resource used by the connected state user, a resource used by the idle state user, and a resource used by the connected state user and the idle state user. When the resource is used, the start time of the receiving window is the uplink sending time of the DUE transmitting the cellular network data;

When the resource of the D2D signal selected by the DUE is the resource used by the idle state user or the resource used by the connected state or the idle state, the start time of the receiving window is the receiving time of the synchronization signal sent by the DUE receiving the synchronization signal source. .

FIG. 5 and FIG. 6 are schematic diagrams of dividing the resource pool according to the state of the user in the second embodiment. The resources corresponding to the user status are divided by a Time Division Multiplexing (TDM) method.

As shown in FIG. 5, the resources are divided into resources used by connected users, resources used by idle users, and resources used by connected users and idle users. As shown in FIG. 6, the resources are divided into connected users. The resource, the connected state user, and the idle state user commonly use resources. The following describes the method for determining the time for transmitting or receiving the D2D signal according to the embodiment of FIG. 5 and FIG. 6 respectively.

As shown in FIG. 5, Resource Set1 is a resource used by a connected state (RRC_Connected) user, Resource Set 2 is a resource used by an idle state (RRC_Idle) user, and Resource Set 3 (Resource Set3) It is a resource used by the connected state (RRC_Connected) user and the idle state (RRC_Idle) user. When the DUE selects the resource on the Resource set1 to send the D2D signal, the D2D transmission time (Tx timing) is the transmission time of the user's cellular uplink. That uses a valid upstream clock In advance; when the DUE selects a resource on Resource set 2 or Resource set 3 to transmit a D2D signal, the D2D transmission time (Tx timing) is based only on the reception time of the synchronization signal transmitted by the DUE receiving the synchronization signal source.

As shown in FIG. 6, Resource Set1 is a resource used by the RRC_Connected user, Resource Set2 is a resource commonly used by the RRC_Connected user and the RRC_Idle user, and the DUE in the RRC_Idle state can only select the resource to transmit the D2D signal on the Resource set2. The transmission time of the D2D signal (Tx timing) varies depending on the selected D2D resource. Specifically, when the DUE selects the resource on the Resource set1 to send the D2D signal, the D2D transmission time (Tx timing) is the transmission time of the user's cellular uplink, that is, a valid uplink clock advance is adopted. When the DUE selects a resource on the Resource set 2 to transmit the D2D signal, the D2D transmission time (Tx timing) is based on the reception time of the synchronization signal sent by the DUE receiving the synchronization signal source, that is, the effective uplink clock advance is not adopted. In the present embodiment, while allowing for RRC_Con _nec ted and RRC_Idle state of mutual discovery between DUE, DUE RRC_Connected state in D2D signal can be transmitted using the resources Resource set2.

In this embodiment, the receiving timing of the DUE listening to the D2D signal can also be related to the D2D resource in which it is listening. Figure 7 and Figure 8 respectively show the transmission time or reception time of the DUE transmitting signals and monitoring signals on different resource pools, which are illustrated in conjunction with Figures 5 and 6.

As shown in FIG. 7, when the DUE listens to the D2D signal on the resource on the Resource set1, the start time of the receiving window is the uplink sending time of the cellular network, and the DUE2 sends the D2D signal on the Resource set1, and the sending time is The uplink transmission time of the user to send the cellular network data, that is, -t2 _; when the DUE1 monitors the D2D signal on the Resource set1, the start time of the reception window is based on the uplink transmission time of the user to send the cellular network data, that is, -tl. According to the triangle three-sided theorem, the time difference between the eNB reaching DUE1 and DUE2 is smaller than the time difference between the two users DUE1 and DUE2. Therefore, it is indicated that the time when the D2D signal sent by the DUE2 reaches the DUE1 end falls after the start time of the DUE1 receiving window.

As shown in FIG. 8, when the DUE listens to the D2D signal on the resource on the Resource set2 or the Resource set3, the start time of the receiving window is the receiving time of the synchronization signal sent by the DUE receiving the synchronization signal source. Similarly, DUE1 The time at which the transmitted D2D signal arrives at DUE2 falls after the start time of the DUE2 receive window.

In this embodiment, the synchronization signal source, such as the base station of the serving cell, may preset the mapping relationship between the D2D signal transmission or reception time and the D2D resource, and store the mapping relationship in the DUE, so that the DUE may be The time at which the D2D signal is transmitted or received is determined based on the selected D2D resource.

According to the foregoing method of the present embodiment, the DUE determines the time for transmitting or receiving the D2D signal according to the D2D resource of the selected transmission signal or the monitoring signal according to the user state, thereby flexibly adjusting the D2D transmission or reception time to reduce the CUE signal and the D2D. Interference between signals. Example 3

The embodiment 3 of the present invention provides a method for determining a signal transmission time or a reception time. Based on the first embodiment, in the embodiment, the D2D discovery resource type is taken as an example to describe how the DUE is based on the selected transmission signal or the monitoring signal. The D2D resource determines the time at which the D2D signal is transmitted or received.

In this embodiment, the D2D discovery is divided into two types: Type 1 (Typel) and Type 2 (Type2). For the specific division method, reference may be made to the prior art, and details are not described herein again.

In this embodiment, when the resource selected by the DUE is a user-specific resource used for D2D discovery, the sending time is an uplink sending time of the user to send cellular data in the cellular network system, for example, in the downlink under the FDD system. On the basis of the receiving time, the uplink clock advance time is adopted. In the TDD system, the sending time is based on the downlink receiving time, and the uplink clock is advanced, and the offset time is generated; the resource selected in the DUE is When the D2D finds a non-user-specific resource used, the transmission time is the reception time of the synchronization signal transmitted by the DUE receiving the synchronization signal source.

For example, the D2D resource used by D2D discovery of Typel is a semi-statically allocated resource pool, and the D2D discovery of Type2 means that the resource for transmitting the discovery signal by D2D is UE-specifically configured. The configuration of the D2D resources is different. When the DUE adopts the Type 1 type D2D discovery, the D2D transmission time (Tx timing) is based only on the reception time of the synchronization signal transmitted by the DUE receiving the synchronization signal source. When the DUE adopts Type 2 type D2D discovery, the D2D transmission time (Tx timing) is based on the DUE's cellular network uplink time.

According to the foregoing method of the present embodiment, the DUE determines the time for transmitting or receiving the D2D signal according to the D2D resource of the selected transmission signal or the monitoring signal according to the D2D discovery, thereby flexibly adjusting the D2D transmission or reception time to reduce the CUE signal and the D2D. Interference between signals. In the above embodiment, the transmission time (Tx timing) of the D2D is based on the receiving time of the DUE receiving the synchronization signal source to send the synchronization signal, where the synchronization signal source is a base station to which the cell in which the DUE is located, such as an eNB. Example 4

Embodiment 4 of the present invention further provides a method for determining a signal transmission time or a reception time. Based on Embodiment 1, in this embodiment, how to select a DUE according to a D2D discovery resource type in a cell or an inter-cell is used as an example. The D2D resource of the signal or monitor signal is sent to determine when to transmit or receive the D2D signal.

In this embodiment, when the resource selected by the DUE is a resource used by the DUE to perform intra-cell D2D discovery, the sending time is a receiving time of the synchronization signal sent by the DUE to receive the serving cell. An uplink sending time for transmitting cellular network data in the serving cell;

When the resource selected by the DUE is a resource used by the DUE for inter-cell D2D discovery, the transmission time is a reception time of the synchronization signal sent by the DUE to the neighboring cell.

According to the foregoing method of the present embodiment, when the DUE performs inter-cell D2D discovery, the sending time is a receiving time of the synchronization signal sent by the DUE to the neighboring cell, thereby flexibly adjusting the D2D transmission time to reduce the CUE signal and the D2D signal. Interference between. Example 5

Embodiment 5 of the present invention also provides a method of determining a signal transmission time or a reception time. The difference from the foregoing embodiment is that the DUE in the foregoing embodiment determines the method for transmitting or receiving the D2D signal, and the D2D resource is bound to the D2D resource, so that the DUE can determine the sending time of the D2D signal according to the adopted D2D resource. And / or receive time.

In this embodiment, when the serving cell base station configures the D2D resource, the indication information corresponding to the D2D resource is further configured to indicate a manner of determining the time for transmitting the D2D signal or receiving the D2D signal, so that

The DUE determines the time at which the D2D signal is transmitted or received according to the manner indicated by the indication information corresponding to the device-to-device (D2D) resource of the selected transmission signal or the listening signal.

In this embodiment, the indication information may be DCI information, for example, when transmitting or receiving a D2D signal. There are three ways of time, using the 2-bit signaling in the DCI information to indicate "00, 01, 10", and the DUE indicates the corresponding time to send or receive the D2D signal according to the received bit signaling indication. The way to determine when to send or receive a D2D signal. Example 6

Embodiment 6 of the present invention further provides a device for determining a signal transmission time or a reception time. As described in Embodiment 6 below, the principle of solving the problem due to the determination signal transmission time or the reception time is similar to that of Embodiment 1, For the specific implementation, reference may be made to the implementation of the method of Embodiment 1, and the description of the same portions will not be repeated.

9 is a schematic diagram of the composition of a device for determining a signal transmission time or a reception time. As shown in FIG. 9, the device 900 includes:

The time determining unit 901 is configured to determine a time at which the D2D signal is transmitted or received according to the device-to-device (D2D) resource of the selected transmission signal or the listening signal.

In this embodiment, the D2D resource may be a resource divided according to a user state, or may be a resource type according to a D2D discovery signal. Specifically, as described in Embodiment 1, it is incorporated herein, and details are not described herein again. It can be seen from the above apparatus of the present embodiment that the D2D transmission time or the reception time changes as the selected D2D resource changes, thereby flexibly adjusting the D2D transmission or reception time to reduce the interference between the CUE signal and the D2D signal. Example 7

Embodiment 7 of the present invention further provides a device for determining a signal transmission time or a reception time. As described in Embodiment 7 below, the principle of solving the problem due to the determination signal transmission time or the reception time is similar to that of Embodiment 2, For the specific implementation, reference may be made to the implementation of the method of Embodiment 2, and the description of the same portions will not be repeated.

Embodiment 7 of the present invention also provides a device for determining a signal transmission time or a reception time. The device includes: a time determining unit, which functions similarly to the embodiment 6, and is hereby incorporated herein by reference.

FIG. 10 is a schematic diagram of the composition of the time determining unit. As shown in FIG. 10, in the embodiment, the time determining unit includes:

The first determining unit 1001 is configured to: when the resource is divided into a resource used by the connected state user, a resource used by the idle state user, a resource used by the connected state user and the idle state user, the selected resource is connected. When the resource used by the user is used, determining that the sending time is an uplink sending time of the user to send cellular data in the cellular network system;

And determining, when the resource selected by the DUE is a resource of an idle state user pair, or a resource corresponding to the idle state and the connected state user, the sending time is a receiving time of the synchronization signal sent by the DUE receiving the synchronization signal source.

In this embodiment, the time determining unit may further include:

a second determining unit 1002, configured to monitor the D2D signal selected by the DUE when the resource is divided into a resource used by the connected state user, a resource used by the idle state user, and a resource commonly used by the connected state user and the idle state user. When the resource is the resource used by the connected user, determining the start time of the receiving window is the uplink sending time of the DUE to send the cellular data;

When the resource for monitoring the D2D signal selected by the DUE is the resource used by the idle state user or the resource used by the connected state or the idle state, determining the start time of the receiving window is the synchronization of the DUE receiving the synchronization signal source. The reception time of the signal.

In this embodiment, the specific implementation manners of the first determining unit 1001 and the second determining unit 1002 are similar to the method in Embodiment 2, and are not repeated here.

In this embodiment, the time determining unit may include any one of the first determining unit 1001 and the second determining unit 1002 described above or both.

According to the foregoing apparatus of the embodiment, the DUE determines the time for transmitting or receiving the D2D signal according to the D2D resource of the selected transmission signal or the monitoring signal according to the user state, thereby flexibly adjusting the D2D transmission or reception time to reduce the CUE signal and the D2D. Interference between signals. Example 8

Embodiment 8 of the present invention further provides a device for determining a signal transmission time or a reception time. As described in Embodiment 8 below, the principle of solving the problem due to the determination signal transmission time or the reception time is similar to that of Embodiment 3, For the specific implementation, reference may be made to the implementation of the method of Embodiment 3, and the description of the same portions will not be repeated.

11 is a schematic diagram of the composition of a device for determining a signal transmission time or a reception time. As shown in FIG. 11, the device 1100 includes:

The time determining unit 1101 is configured to determine a time for transmitting or receiving the D2D signal according to the device-to-device (D2D) resource of the selected transmission signal or the monitoring signal. In this embodiment, the time determining unit 1101 may further include:

a third determining unit, configured to: when the resource selected by the DUE is a user-specific resource used for D2D discovery, the sending time is an uplink sending time of the user to send cellular data in the cellular network system;

When the resource selected by the DUE is a non-user-specific resource used for D2D discovery, the transmission time is a reception time of the synchronization signal sent by the DUE receiving the synchronization signal source. In this embodiment, the specific implementation manner of the first determining unit 10011 is similar to the method in Embodiment 3, and is not repeated here.

According to the foregoing apparatus of the present embodiment, the DUE determines the time for transmitting or receiving the D2D signal according to the D2D resource of the selected transmission signal or the monitoring signal according to the D2D discovery, thereby flexibly adjusting the D2D transmission or reception time to reduce the CUE signal and the D2D. Interference between signals. Example 9

Embodiment 9 of the present invention further provides a device for determining a signal transmission time or a reception time. As described in Embodiment 9 below, the principle of solving the problem due to the determination signal transmission time or the reception time is similar to the method of Embodiment 4, For the specific implementation, reference may be made to the implementation of the method of Embodiment 4, and the description of the same portions will not be repeated.

Embodiment 9 of the present invention also provides a device for determining a signal transmission time or a reception time. The device includes: a time determining unit, which functions similarly to the embodiment 6, and is hereby incorporated herein by reference.

In this embodiment, the time determining unit includes:

a fourth determining unit, when the resource selected by the DUE is a resource used by the DUE to perform intra-cell D2D discovery, the sending time is a receiving time of the synchronization signal sent by the DUE to receive the serving cell, or The uplink sending time of the cellular network data sent by the serving cell;

According to the foregoing apparatus of the present embodiment, when the DUE performs inter-cell D2D discovery, the sending time is a receiving time of the synchronization signal sent by the DUE to the neighboring cell, thereby flexibly adjusting the D2D transmission time to reduce the CUE signal and the D2D signal. Interference between. Example 10

Embodiment 10 of the present invention further provides a device for determining a signal transmission time or a reception time. As described in Embodiment 10 below, the principle of solving the problem due to the determination signal transmission time or the reception time is the same as that of Embodiment 5. The method is similar, so the specific implementation can refer to the implementation of the method of Embodiment 5, and the description of the same portions will not be repeated.

Referring to Figure 9, the device 900 includes:

The time determining unit 900 is configured to determine a time at which the D2D signal is transmitted or received according to the device-to-device (D2D) resource of the selected transmission signal or the listening signal.

In this embodiment, the manner of determining the time for transmitting the D2D signal or receiving the D2D signal is indicated according to the indication information corresponding to the resource configured by the serving cell base station; and the DUE is based on the device-to-device (D2D) with the selected transmission signal or the monitoring signal. The time indicated by the indication information corresponding to the resource determines the time at which the D2D signal is transmitted or received.

In this embodiment, the indication information may be DCI information, for example, when there are three ways of sending or receiving the D2D signal, using 2-bit signaling in the DCI information, such as "00, 01, 10 The DUE determines the time at which the D2D signal is transmitted or received according to the manner in which the received bit signaling indicates the corresponding time to determine whether to transmit or receive the D2D signal. Example 11

The embodiment of the present invention provides a user equipment, which includes the apparatus for determining a signal transmission time or a receiving time as described in any one of Embodiments 6 to 10.

FIG. 12 is a schematic block diagram showing the system configuration of the user equipment 1200 according to the embodiment of the present invention. As shown in FIG. 12, the user equipment 1200 can include a central processing unit 1201 and a memory 1240; the memory 1240 is coupled to the central processing unit 1201. It is worth noting that the figure is exemplary; other types of structures may be used to supplement or replace the structure to implement telecommunications functions or other functions.

In one embodiment, the functionality of determining the signal transmission time or reception time device may be integrated into the central processor 1201. The central processing unit 1201 may be configured to: determine, by the DUE, the time at which the D2D signal is transmitted or received according to the selected device-to-device (D2D) resource of the transmitted signal or the monitored signal.

The central processing unit 1201 may be configured to: when the resource is divided into a resource used by the connected state user, a resource used by the idle state user, a resource commonly used by the connected state user and the idle state user, the selected resource is a connected state user. When the resource is used, the sending time is an uplink sending time of the user to send cellular data under the cellular network system;

The resource selected by the DUE is a resource corresponding to an idle state user, or an idle state and a connected state user pair. The central processor 1201 may be configured to: the transmission time is a reception time of the synchronization signal transmitted by the DUE receiving the synchronization signal source.

The central processing unit 1201 may be configured to: when the resource is divided into resources used by the connected state user, resources used by the idle state user, resources used by the connected state user and the idle state user, the D2D signal selected by the DUE is monitored. When the resource is a resource used by the connected state, the start time of the receiving window is the uplink sending time of the DUE to send the cellular data;

The central processing unit 1201 may be configured to: when the resource selected by the DUE is a user-specific resource used for D2D discovery, the sending time is an uplink sending time of the user to send cellular data under the cellular network system;

When the resource selected by the DUE is a non-user-specific resource used for D2D discovery, the transmission time is a reception time of the synchronization signal transmitted by the DUE receiving the synchronization signal source.

The central processing unit 1201 may be configured to: when the resource selected by the DUE is a resource used by the DUE for intra-cell D2D discovery, the sending time is a receiving time of the synchronization signal sent by the DUE to receive the serving cell or in the service The uplink sending time of sending cellular network data under the cell;

When the resource selected by the DUE is a resource used by the DUE to perform inter-cell D2D discovery, the transmission time is a reception time of the synchronization signal sent by the DUE to the neighboring cell.

The central processing unit 1201 may be configured to: indicate, according to the indication information corresponding to the resource configured by the serving cell base station, a manner of determining a time for transmitting the D2D signal or receiving the D2D signal;

And the DUE determines the time at which the D2D signal is transmitted or received according to the manner indicated by the indication information corresponding to the device-to-device (D2D) resource of the selected transmission signal or the listening signal.

In another embodiment, the determining signal transmission time or receiving time device may be configured separately from the central processing unit 1201, for example, the determining signal transmission time or receiving time device may be configured as a chip connected to the central processing unit 1201 through the central processing unit. The control is implemented to determine the function of the signal transmission time or the reception time device.

As shown in FIG. 12, the user equipment 1200 may further include: a communication module 1210, an input unit 1220, an audio processing unit 1230, a display 1260, and a power supply 1270. It is worth noting that the user equipment 1200 is also It is not necessary to include all of the components shown in FIG. 12; further, the user device 1200 may also include components not shown in FIG. 12, and reference may be made to the prior art.

As shown in FIG. 12, central processor 1201, also sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls each of user devices 1200. The operation of the part.

The memory 1240 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device. The above-mentioned information related to the failure can be stored, and a program for executing the related information can be stored. And the central processing unit 1201 can execute the program stored in the memory 1240 to implement information storage or processing and the like. The functions of other components are similar to those of the existing ones and will not be described here. The various components of user equipment 1200 may be implemented by special purpose hardware, firmware, software or a combination thereof without departing from the scope of the invention.

With the user equipment of this embodiment, the D2D transmission time or the reception time changes according to the selected D2D resource change, thereby flexibly adjusting the D2D transmission or reception time to reduce the interference between the CUE signal and the D2D signal. Example 12

Embodiment 12 of the present invention further provides a base station.

Figure 13 is a block diagram showing the structure of a base station according to Embodiment 13 of the present invention. As shown in FIG. 13, base station 1300 can include: a central processing unit (CPU) 1301 and a memory 1310; and a memory 1310 coupled to central processing unit 1301. The memory 1310 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 1301 to receive various information transmitted by the user equipment and to transmit information to the user equipment.

In an embodiment, the central processing unit 1301 may be configured to: indicate, according to the indication information corresponding to the resource configured by the base station, a manner of determining a time for transmitting the D2D signal or receiving the D2D signal; so that the DUE according to the selected sending signal or the monitoring The device of the signal determines the time at which the D2D signal is transmitted or received in a manner indicated by the indication information corresponding to the device (D2D) resource.

In this embodiment, the central processing unit 1301 is configured to: configure a mapping relationship between the D2D resource and the indication information.

The storage unit 1310 can store the foregoing related information of the configuration. In another embodiment, the above functions of the central processing unit may be configured as a chip connected to the central processing unit 1301, and the function of information configuration is implemented by control of the central processing unit.

In addition, as shown in FIG. 13, the base station 1300 may further include: a transceiver 1320, an antenna 13130, and the like; wherein the functions of the foregoing components are similar to those of the prior art, and details are not described herein again. It is to be noted that the base station 1300 does not necessarily have to include all of the components shown in FIG.

It can be seen from the above embodiment that the D2D transmission time or the reception time changes according to the selected D2D resource, thereby flexibly adjusting the D2D transmission or reception time to reduce the interference between the CUE signal and the D2D signal. Example 13

Figure 14 is a block diagram showing the configuration of a communication system in accordance with a thirteenth embodiment of the present invention. As shown in FIG. 14, the communication system 1400 includes a user equipment 1402, a serving cell base station 1401;

The DUE 1402 determines the time to transmit or receive the D2D signal based on the selected device-to-device (D2D) resource for the transmitted or monitored signal.

In this embodiment, the indication information corresponding to the resource configured by the serving cell base station 1401 where the DUE 1402 is located indicates the manner of determining the time for transmitting the D2D signal or receiving the D2D signal; and the DUE 1402 transmits or monitors according to the selected transmission signal. The device of the signal determines the time at which the D2D signal is transmitted or received in a manner indicated by the indication information corresponding to the device (D2D) resource.

In this embodiment, the system may further include a neighboring cell base station 1403, where the D2D resource configured by the serving cell base station is used when the resource selected by the DUE is used by the DUE for D2D discovery in the cell. Corresponding indication information indicates that the synchronization signal source is the serving cell base station, and the sending time is a receiving time of the DUE receiving the synchronization signal sent by the serving cell or an uplink sending time of sending the cellular network data in the serving cell, for example, the FDD system is Adopting an uplink clock in advance based on the reception time of receiving the synchronization signal);

When the resource selected by the DUE is the resource used by the DUE for inter-cell D2D discovery, the D2D resource configured by the serving cell base station is a resource obtained by the interaction between the serving cell and the neighboring cell. The indication information corresponding to the D2D resource configured by the serving cell base station indicates that the synchronization signal source refers to the neighboring cell, and the sending time is the receiving time of the synchronization signal sent by the DUE to the neighboring cell.

In this embodiment, the synchronization signal source is determined according to whether the DUE is intra-cell D2D discovery or inter-cell D2D discovery. When the intra-cell D2D is found, the synchronization signal source is the serving cell. The base station 1401, when detecting for inter-cell D2D, the synchronization signal source is the neighboring cell base station 1403;

In this embodiment, the configuration of the serving cell base station 1401 and the user equipment 1402 can be referred to the embodiments 11 and 12, and the content thereof is incorporated herein, and details are not described herein again.

With the system of the present embodiment, the D2D transmission time or reception time varies with the selected D2D resource, thereby flexibly adjusting the D2D transmission or reception time to reduce the interference between the CUE signal and the D2D signal. Embodiments of the present invention also provide a computer readable program, wherein the program causes a computer to execute an embodiment in the device or user equipment when the program is executed in a determining signal transmission time or receiving time device or user equipment The method of determining the signal transmission time or the reception time described in 1~5.

Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute an embodiment in determining a signal transmission time or a reception time device or user equipment

The method of determining the signal transmission time or the reception time described in 1~5.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium. The method may include all or part of the steps in the foregoing embodiment, and the storage medium may include: a ROM, a RAM, a magnetic disk, an optical disk, and the like.

The above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that these descriptions are illustrative and not restrictive. A person skilled in the art can make various modifications and changes to the invention in accordance with the spirit and the principles of the invention, which are also within the scope of the invention.

Claims

claims

1. A device for determining signal transmission time or reception time, including:

A time determination unit configured to determine the time to send or receive a D2D signal according to the selected device-to-device (D2D) resource that sends a signal or monitors a signal.

2. The device according to claim 1, wherein the time determination unit includes:

The first determination unit is configured to, when dividing resources into resources used by connected users, resources used by idle users, and resources used jointly by connected users and idle users, when the selected resources are When it is a resource used by a connected user, it is determined that the sending time is the uplink sending time of the user sending cellular data under the cellular network system;

It is used to determine that the sending time is the reception time of the synchronization signal sent by the DUE when the DUE receives the synchronization signal sent by the synchronization signal source when the resource selected by the DUE is a resource of an idle state user pair, or a resource corresponding to an idle state user and a connected state user.

3. The device according to claim 1, wherein the time determination unit includes:

The second determination unit is used to divide the resources into resources used by connected users, resources used by idle users, and resources jointly used by connected users and idle users. When the resources for monitoring D2D signals are resources used by connected users, determine the starting time of the receiving window to be the uplink transmission time of the DUE sending cellular data;

Used to determine that the starting time of the receiving window is the synchronization sent by the DUE receiving synchronization signal source when the resource selected by the DUE to monitor the D2D signal is a resource used by an idle state user, or a resource used in a connected state or an idle state. Signal reception time.

4. The device according to claim 1, wherein the time determination unit includes: a third determination unit, the third determination unit is configured to: when the resource selected by the DUE is a user-specific resource used for D2D discovery, The sending time is the uplink sending time of the user sending cellular data under the cellular network system;

When the resource selected by the DUE is a non-user-specific resource used for D2D discovery, the sending time is the reception time of the synchronization signal sent by the synchronization signal source.

5. The device according to claim 1, wherein the time determination unit includes: a fourth determination unit, when the resource selected by the DUE is a resource used by the DUE for intra-cell D2D discovery, The sending time is the reception time when the DUE receives the synchronization signal sent by the serving cell or when the serving cell Uplink transmission time for sending cellular network data under the zone;

When the resource selected by the DUE is the resource used by the DUE for inter-cell D2D discovery, the sending time is the reception time of the DUE receiving the synchronization signal sent by the neighboring cell.

6. The device according to claim 1, wherein the device further includes:

Instruct the method of determining the time to send or receive D2D signals according to the indication information corresponding to the resources configured by the serving cell base station;

And the DUE determines the time to send or receive the D2D signal according to the manner indicated by the indication information corresponding to the selected device-to-device (D2D) resource that sends the signal or monitors the signal.

7. A user equipment, wherein the user equipment includes the device described in claim 1.

8. A communication system, including user equipment and serving cell base station; wherein,

The DUE determines when to send or receive a D2D signal based on the device-to-device (D2D) resource selected to send or listen for the signal.

9. The system according to claim 8, wherein the system further includes:

Instruct the method of determining the time to send a D2D signal or receive a D2D signal according to the indication information corresponding to the resource configured by the serving cell base station;

10. The system according to claim 9, wherein the system further includes: a neighboring cell base station, wherein when the resource selected by the DUE is the resource used by the DUE for intra-cell D2D discovery, the sending time is The reception time of the DUE receiving the synchronization signal sent by the serving cell or the uplink sending time of cellular network data sent under the serving cell;