WO2015188571A1

WO2015188571A1 - Wireless network communication method, access device and user equipment

Info

Publication number: WO2015188571A1
Application number: PCT/CN2014/089723
Authority: WO
Inventors: 谢峰; 陈琳; 郝鹏; 吴栓栓; 吕开颖
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-06-13
Filing date: 2014-10-28
Publication date: 2015-12-17
Also published as: CN105208626A

Abstract

Provided are a wireless network communication method, an access device and a user equipment. The communication method comprises: establishing, by an access device, a device to device (D2D) communication with a user equipment (UE), wherein the UE accesses a designated network through the access device; and forwarding, by the access device, data from the designated network to the UE, or forwarding data from the UE to the designated network. By means of the technical solution provided in the present invention, the technical problems in the related art that there is no solution for realizing a wireless network deployed flexibly and needing no planning, etc. are solved, thereby realizing the flexible deployment of the wireless network and simplifying the network architecture.

Description

Wireless network communication method, access device, user equipment

Technical field

The present invention relates to the field of communications, and in particular, to a communication method, an access device, and a user equipment (User Equipment, referred to as UE, also referred to as a terminal terminal) of a wireless network.

Background technique

In a wireless cellular communication system, a base station (abbreviated as a BS, also referred to as an evolved Node B, referred to as an eNB) is a device that provides wireless access to the UE, and the base station and the UE perform electromagnetic waves. Wireless communication. A base station may provide one or more serving cells, and the wireless communication system may provide wireless coverage for terminals within a certain geographical range through the serving cell.

In order to provide wireless communication to users in a wide range, wireless communication systems need to deploy base stations with large coverage. These base stations are usually called macro base stations (Macro eNB or Macro BS, Macro Base Station), and their serving cells are usually called macro cells. (Macro Cell). In addition, considering the different needs of users and different usage environments, wireless communication systems need to provide users with coverage holes or provide higher quality wireless communication services in certain environments or scenarios, so some coverage is small and the transmission power is low. The small base station (or transmission node, TP for short) is adopted. These small base stations include a micro base station (Pico eNB or Pico BS) and a child base station (Femto eNB or Femto BS), wherein the child base station may also be referred to as a home base station (also referred to as Home Node B, Home Node B, referred to as HNB; or A home eNB (referred to as HeNB), a femto base station, or a femto base station, and a cell provided by a micro base station and a home base station are called a pico cell and a femto cell. A node corresponding to a small base station is also referred to as a low power node (LPN), and a cell corresponding to these nodes is also called a small cell.

Increasing network capacity by densely deploying small cells or small base stations has become an important means to increase the capacity of wireless networks. However, the deployment of the existing base station is not flexible. For example, the base station belongs to the operator equipment. The deployment of the base station involves network planning and optimization by professionals, and involves a series of tasks such as configuration and management of the base station. Therefore, it is important to support a dense wireless network without planning that can be deployed flexibly.

In view of the above technical problems in the related art, there is currently no effective solution.

Summary of the invention

The present invention provides a communication method, an access device, and a user equipment of a wireless network to solve at least the above technical problems, in order to solve the technical problem of the wireless network, and the like.

In order to achieve the above object, according to an embodiment of the present invention, a communication method of a wireless network is provided, including: an access device and a user equipment UE establish device-to-device D2D communication, wherein the UE passes the access device Accessing a designated network; the access device forwards data from the designated network to the UE or forwards data from the UE to the designated network.

Preferably, before the access device and the UE establish D2D communication, the method includes: the access device sends a D2D synchronization signal and/or a discovery message, where the D2D discovery message carries the type and/or name of the specified network. And/or the D2D synchronization signal carries the type of the specified network.

Preferably, before the access device and the UE establish D2D communication, the method includes: the access device sends a D2D synchronization signal and/or a discovery message, where the D2D synchronization signal and/or the discovery message carries a device type, The device type includes an indication for indicating whether a sender of the D2D synchronization signal and/or the discovery message is an access device, and/or indication information for distinguishing different access devices.

Preferably, before the access device and the UE establish D2D communication, the method includes: the access device sends a D2D discovery message, where the D2D discovery message carries information of a wireless local area network WLAN.

Preferably, the information of the WLAN includes at least one of the following: a service set identifier SSID, a basic service set identifier BSSID, carrier frequency information, and channel channel information.

Preferably, the method further comprises: the UE measuring D2D signal power and/or quality of the access device; determining whether the signal power and/or quality meets a measurement event condition configured by the base station; And sending a measurement report to the base station, where the measurement report provides a decision basis for the base station to send a D2D communication indication information.

Preferably, the measurement report includes: a D2D signal measurement value, the received D2D synchronization signal, and/or information in the discovery message.

Preferably, the measurement event condition comprises one of: a D2D signal measurement value is higher than a sum of a signal measurement value of the serving cell and a base station configured offset parameter; the D2D signal measurement value is higher than a base station configured threshold value; and the D2D signal is used. The measured value is higher than the first threshold value configured by the base station and the signal measurement value of the serving cell is lower than the second threshold value configured by the base station.

Preferably, after transmitting the measurement report to the base station, the method further includes: the base station transmitting, to the UE and the access device, a D2D communication establishment indication or D2D communication configuration information, where the D2D communication establishment indication and/or the D2D communication configuration information is Carrying: a communication type identifier for indicating whether to communicate with the designated network, and/or configuration information related to communicating with the designated network.

Preferably, before the access device and the UE establish D2D communication, the base station includes: the base station broadcasts or unicasts the discovery resource information used by the access device, and/or the synchronization signal information used by the access device.

Preferably, before the access device and the UE establish D2D communication, the method includes: the UE sends a D2D synchronization signal and/or a discovery message, where the D2D synchronization signal and/or the discovery message carries a device type, the device The type includes: an indication for indicating whether a sender of the D2D synchronization signal and/or the discovery message is looking for the access device, and/or for distinguishing between different access devices or different specified networks Instructions.

Preferably, the method further comprises: the access device measuring D2D signal power and/or quality of the UE; determining whether the signal power and/or quality meets a measurement event condition configured by the base station; And sending a measurement report to the base station, where the measurement report provides a decision basis for the base station to send a D2D communication indication information.

Preferably, the measurement event condition comprises one of the following: the D2D signal measurement value is higher than the signal measurement value of the serving cell.

And the offset parameter of the base station configuration; the D2D signal measurement value is higher than the threshold value configured by the base station; the D2D signal measurement value is higher than the first threshold value configured by the base station, and the signal measurement value of the serving cell is lower than the base station configuration Two thresholds.

Preferably, after the base station sends the D2D communication establishment indication to the UE and the access device, the method further includes: the access device receiving the D2D communication establishment indication; the access device assigning the UE and the designation to the UE The IP address of the network communication and the IP address is sent.

Preferably, the method further includes: the base station broadcasts or unicasts the discovery resource information used by the UE by using an air interface, wherein the UE is a UE that searches for the access device or the designated network.

Preferably, before the access device and the user equipment UE establish device-to-device D2D communication, the method further includes: the UE receiving the access device-specific resource information indicated by the base station.

Preferably, the resource information comprises at least one of: the access device-specific scheduling assignment SA resource information, the access device-specific data resource information.

Preferably, the SA resource information includes: transmission direction indication information used to indicate a data transmission direction of the access device.

Preferably, the access device forwards data from the specified network to the UE or forwards data from the UE to the designated network, including: the access device forwards from the backhaul manner by using a backhaul line Specify data for the network or the UE.

Preferably, the backhaul mode comprises: wired backhaul and/or wireless backhaul.

In order to achieve the above object, according to still another embodiment of the present invention, a communication method of a wireless network is provided, including: a user equipment UE and an access device establish device-to-device D2D communication, wherein the UE passes the connection The ingress device accesses the designated network; the UE transmits data to the designated network or receives data from the designated network through the access device.

Preferably, before the UE and the access device establish D2D communication, the UE includes: receiving, by the UE, a D2D synchronization signal and/or a discovery message sent by the access device, where the D2D discovery message carries the specified network. The type and/or name, and/or the D2D synchronization signal carries the type of the specified network.

Preferably, before the UE and the access device establish device-to-device D2D communication, the method includes: the UE receiving a D2D synchronization signal and/or a discovery message sent by the access device, where the D2D synchronization signal and/or the The discovery message carries a device type, and the device type includes: an indication for indicating whether the access device is an access device, and/or indication information for distinguishing different access devices.

Preferably, before the UE and the access device establish device-to-device D2D communication, the method includes: the UE receiving a D2D discovery message sent by the access device, where the D2D discovery message carries information of a wireless local area network WLAN.

Preferably, the method further comprises: the UE measuring D2D signal power and/or quality of the access device; determining whether the signal power and/or quality meets a measurement event condition configured by the base station; , then Sending a measurement report to the base station, where the measurement report provides a decision basis for the base station to send D2D indication information.

Preferably, the measurement report includes: a D2D signal measurement value, the received D2D synchronization signal, and/or information of the discovery message.

Preferably, after the sending the measurement report to the base station, the method further includes: receiving, by the UE, a D2D communication establishment indication or D2D communication configuration information sent by the base station, where the D2D communication establishment indication and/or the D2D communication configuration information is carried There is: a communication type identifier for indicating whether to communicate with the designated network, and/or configuration information related to communication with the designated network.

Preferably, after the UE receives the D2D communication establishment indication sent by the base station, the method further includes: receiving, by the UE, the IP address that the access device allocates, by the access device, the UE to the specified network.

Preferably, before the UE and the access device establish device-to-device D2D communication, the method includes: the UE receiving discovery resource information used by the base station to broadcast or unicast the access device by using an air interface, and/or used by the access device Synchronization signal information.

Preferably, the method further includes: receiving, by the UE, discovery resource information used by the base station to broadcast or unicast the UE by using an air interface.

Preferably, before the UE and the access device establish device-to-device D2D communication, the method further includes: the UE receiving the access device-specific resource information indicated by the base station.

Preferably, the UE sends data to the designated network or receives data from the specified network by using the access device, including: the UE uses the backhaul line backhaul manner to connect to the designated network by using the access device. Send or receive data.

In order to achieve the above object, according to still another embodiment of the present invention, an access device is provided, including: a communication module, configured to establish device-to-device D2D communication between the access device and the user equipment UE, where And the UE accesses the designated network by using the access device; the forwarding module is configured to forward data from the specified network to the UE or forward data from the UE to the specified network.

In order to achieve the above object, according to still another embodiment of the present invention, a user equipment UE is further provided, including:

a communication module, configured to establish device-to-device D2D communication between the UE and the access device, where the UE accesses the designated network by using the access device, and the transceiver module is configured to use the access device to The designated network transmits data or receives data from the designated network.

With the embodiment of the present invention, device-to-device (D2D) communication is established between the access device and the UE, and the access device forwards the data of the UE to the specified network by forwarding the data from the specified network to the UE. The technical means solves the technical problems such as the solution of the wireless network without planning for flexible deployment, and realizes the flexible deployment of the wireless network and simplifies the network architecture.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flowchart of a communication method of a wireless network according to an embodiment of the present invention;

2 is a structural block diagram of an access device according to an embodiment of the present invention;

3 is another flowchart of a communication method of a wireless network according to an embodiment of the present invention;

4 is a structural block diagram of a user equipment according to an embodiment of the present invention;

5 is a network topology diagram of an access device supporting a wired backhaul in the case of coverage by an eNB base station according to a preferred embodiment of the present invention;

6 is a network topology diagram of an access device supporting wireless backhaul in the case of coverage by an eNB base station according to a preferred embodiment of the present invention;

7 is a network topology diagram of an access device supporting a wired backhaul in the case of an eNB without base station coverage according to a preferred embodiment of the present invention;

8 is a network topology diagram of an access device supporting wireless backhaul in the case of eNB-free base station coverage according to a preferred embodiment of the present invention;

9 is a network topology diagram of multiple access devices with eNB base station coverage in accordance with a preferred embodiment of the present invention;

10 is a network topology diagram of multiple access devices in the case of eNB-free base station coverage in accordance with a preferred embodiment of the present invention;

11 is a simplified flow diagram of a UE communicating with an access device in accordance with a preferred embodiment of the present invention;

12 is a flowchart of communication between a UE with coverage of a base station and an access device according to a preferred embodiment of the present invention;

13 is a flowchart of communication between a UE with coverage of a base station and an access device according to a preferred embodiment of the present invention;

14 is a flow diagram of a UE under partial coverage communicating with an access device in accordance with a preferred embodiment of the present invention;

15 is a flow diagram of a UE under partial coverage communicating with an access device in accordance with a preferred embodiment of the present invention;

16 is a flowchart of communication between a UE and an access device under the coverage of an eNB-free base station according to a preferred embodiment of the present invention;

17 is another flow diagram of a UE communicating with an access device without eNB base station coverage in accordance with a preferred embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

1 is a flow chart of a method of communication of a wireless network in accordance with an embodiment of the present invention. As shown in FIG. 1, the method includes step S102 and step S104:

Step S102: The access device establishes D2D communication with the UE, where the UE accesses the designated network by using the access device.

Step S104: The access device forwards data from the specified network to the UE or forwards data from the UE to the specified network.

Through the above various processing steps, since the D2D communication is utilized in the wireless network deployment, that is, the communication of the wireless network is realized by the D2D communication between the access device and the UE, the flexible deployment of the wireless network can be realized, and the network is simplified. Architecture. In the step S104, there are multiple ways for the access device to forward data. In a preferred embodiment of the present embodiment, data from the specified network or the UE may be forwarded by using a backhaul mode, but is not limited thereto.

Among them, the above backhaul methods include: wired backhaul and/or wireless backhaul.

There are various implementation manners of step S102, for example, the following manner can be implemented:

(1) In order to establish the D2D communication in step S102, the access device sends a D2D synchronization signal and/or a discovery message, where the D2D synchronization signal and/or the discovery message carries a device type, and the device type includes: Whether the access device is an indication of the access device, and/or indication information for distinguishing different access devices.

(2) The access device sends a D2D synchronization signal and/or a discovery message, where the D2D discovery message carries the type and/or name of the specified network, and/or the D2D synchronization signal carries the type of the specified network.

(3) The access device sends a D2D discovery message, where the D2D discovery message carries information of the WLAN. Preferably, the information of the WLAN includes but is not limited to at least one of the following: a service set identifier SSID, a basic service set identifier BSSID, a carrier frequency, and channel information.

Of course, in a preferred embodiment, the (1)-(3) implementations are also arbitrarily combined. For example, the following discovery message carries at least two pieces of information: specifying the type of the network and/or Name, device type, WLAN information.

Through the above process, the UE can discover the access device, thereby establishing D2D communication between the access device and the UE.

Before the step S102 is established, the embodiment may further perform the following process: the UE measures the D2D signal power and/or quality of the access device; determines whether the signal power and/or quality meets the measurement event condition of the serving cell configuration; In the case, the measurement report is sent to the base station to which the serving cell belongs, and the measurement report provides a decision basis for the base station to send the D2D indication information. At this time, the measurement report includes: the D2D signal measurement value, the received D2D synchronization signal and/or the information of the above-mentioned discovery message, but is not limited thereto. The above measurement The condition includes one of the following: the D2D signal measurement value is higher than the sum of the signal measurement value of the serving cell and the base station configured offset parameter; the D2D signal measurement value is higher than the base station configured threshold value; the D2D signal measurement value is higher than the base station configuration The first threshold value and the signal measurement value of the serving cell are lower than the second threshold value configured by the base station.

In a preferred implementation, after the measurement report is sent to the base station, the base station sends a D2D communication establishment indication or D2D communication configuration information to the UE and the access device, where the D2D communication establishment indication and/or the D2D communication configuration information carries: A communication type identifier for indicating whether to communicate with the specified network, and/or configuration information related to communication with the specified network.

In this embodiment, before step S102, the base station broadcasts or unicasts the discovery resource information (such as time domain pattern information, frequency domain resource information, but not limited to) used by the access device, and/or the foregoing access. Synchronization signal information used by the device (for example, the range of values of the synchronization signal sequence index of the access device). In this way, the access device can discover the UE and establish D2D communication.

In this embodiment, before the step S102, the UE sends a D2D synchronization signal and/or a discovery message, where the D2D synchronization signal and/or the discovery message carries a device type, and the device type includes: used to indicate D2D synchronization. Whether the sender of the signal and/or discovery message is looking for an indication of the access device, and/or for distinguishing between the indication of finding a different access device or a different specified network

At this time, the base station may also broadcast or unicast the discovery resource information used by the UE by using an air interface, where the UE is a UE that searches for an access device or a UE of the specified network. In this way, an effective pairing between the UE and the access device can be achieved, and the process of establishing D2D communication is accelerated.

In a preferred implementation, before step S102, the following process may be further included: the access device measures the D2D signal power and/or quality of the UE; and determines whether the signal power and/or quality meets the measurement event condition configured by the base station; If the information is satisfied, the measurement report is sent to the base station, where the measurement report provides a decision basis for the base station to send the D2D communication indication information.

The measurement event conditions described in this embodiment include, but are not limited to, one of the following: the D2D signal measurement value (eg, signal strength and/or quality) is higher than the sum of the signal measurement value of the serving cell and the offset parameter configured by the base station; D2D The signal measurement value is higher than the threshold value configured by the base station; the D2D signal measurement value is higher than the first threshold value configured by the base station, and the signal measurement value of the serving cell is lower than the second threshold value configured by the base station.

In this embodiment, after transmitting the measurement report to the base station, the base station sends a D2D communication establishment indication or D2D communication configuration information to the UE and the access device, where the D2D communication establishment indication and/or the D2D communication configuration information is carried in the foregoing : used to indicate whether it is a communication type identifier for communicating with the above specified network, and / Or configuration information related to accessing the specified network (for example, IP address allocation indication information, but is not limited thereto).

After the base station sends the D2D communication establishment indication to the UE and the access device, the access device receives the D2D communication establishment indication; the access device allocates, to the UE, the IP address of the UE to communicate with the specified network, and sends the IP address, where L2, for example, a Media Access Control (MAC) control element (Control Element, referred to as CE), may also be transmitted through the IP layer or the application layer, but is not limited thereto.

In this embodiment, the base station may also broadcast or unicast the discovery resource information used by the UE through the air interface, where the UE is the UE that searches for the access device or the specified network.

Before establishing the D2D communication, the UE receives the resource information specific to the access device indicated by the base station. In this way, the UE can identify, according to the resource information, whether the access device is a designated device that accesses the specified network. In a preferred embodiment, the foregoing resource information includes, but is not limited to, at least one of the following: the access device-specific scheduling assignment SA resource information, and the access device-specific data resource information. The SA resource information includes: transmission direction indication information used to indicate a data transmission direction of the access device.

In this embodiment, an access device is further provided to implement the foregoing method. As shown in FIG. 2, the access device includes:

The communication module 20 is configured to establish device-to-device D2D communication between the access device and the UE, where the UE accesses the designated network through the access device;

The forwarding module 22, coupled to the communication module 20, is configured to forward data from the designated network to the UE or to forward data from the UE to the designated network.

In a preferred embodiment, the forwarding module 22 is further configured to forward data from the specified network or the UE by using a backhaul mode, and to forward the data from the specified network or the UE when the backhaul mode includes the following information. Data: wired backhaul and / or wireless backhaul.

It should be noted that each module in the foregoing embodiment may be implemented by software or hardware. The latter can be implemented in the following manner, but is not limited thereto: the communication module 20 and the forwarding module 22 are respectively located in the first processor and the second processor, or the communication module 20 and the forwarding module 22 are located in the same processor.

In this embodiment, a communication method of the wireless network is further provided on the user equipment side. As shown in FIG. 3, the method includes:

Step S302, the UE and the access device establish device-to-device D2D communication, where the UE accesses the designated network through the access device;

Step S304, the UE sends data to the designated network or receives data from the specified network through the access device.

Through the above various processing steps, since the D2D communication is established between the UE and the access device, and the UE transmits data to or receives data from the designated network through the access device, flexible deployment of the wireless network can be realized, and simplified. The network architecture.

In this embodiment, the UE sends or receives data to the specified network through the access device by using the backhaul line backhaul mode. Among them, the backhaul way includes: wired backhaul and / or wireless backhaul.

Before the UE and the access device establish device-to-device D2D communication, one of the following processes can also be performed:

(1) The UE receives the D2D synchronization signal and/or the discovery message sent by the access device, where the D2D synchronization signal and/or the discovery message carries a device type, and the device type includes: Whether it is an indication of the access device, and/or indication information for distinguishing different access devices.

(2) The UE receives the D2D synchronization signal and/or the discovery message sent by the access device, where the D2D discovery message carries the type and/or name of the specified network, and/or the D2D synchronization signal carries the foregoing designation. The type of network.

(3) The UE receives the D2D discovery message sent by the access device, where the D2D discovery message carries information of a wireless local area network (WLAN). The information of the WLAN at this time includes, but is not limited to, at least one of the following: a Service Set Identifier (SSID), a Basic Service Set Identifier (BSSID), a carrier frequency, and channel channel information.

At this time, the UE measures the D2D signal power and/or quality of the access device, determines whether the signal power and/or quality meets the measurement event condition of the serving cell configuration, and if yes, sends the signal to the base station to which the serving cell belongs. The measurement report, wherein the foregoing measurement report provides a decision basis for the base station to issue a D2D indication information.

The above measurement report includes but is not limited to the following information: D2D signal measurement value, received D2D synchronization signal and/or information of the above-mentioned discovery message.

Before the UE and the access device establish device-to-device D2D communication, the UE receives the discovery resource information used by the access device of the base station through the air interface broadcast or unicast, and/or the synchronization signal information used by the access device. At this time, the UE receives the discovery resource information used by the foregoing base station to broadcast or unicast the UE through the air interface.

In a preferred embodiment, the measurement event condition includes one of the following: the D2D signal measurement value is higher than the sum of the signal measurement value of the serving cell and the base station configured offset parameter; and the D2D signal measurement value is higher than the threshold value configured by the base station. The D2D signal measurement value is higher than the first threshold value configured by the base station and the signal measurement value of the serving cell is lower than the second threshold value configured by the base station.

In this embodiment, after the measurement report is sent to the base station to which the serving cell belongs, the method further includes: receiving, by the UE, a D2D communication establishment indication or D2D communication configuration information sent by the base station, where the D2D establishment indication and/or the D2D communication configuration information is used. And carrying: a communication type identifier for indicating whether to communicate with the specified network, and/or configuration information related to accessing the specified network.

In this embodiment, after the UE receives the D2D communication establishment indication sent by the base station, the UE receives an IP address allocated by the access device for the UE, and the IP address is an address of the UE in the specified network.

Before the UE and the access device establish device-to-device D2D communication, the following process may be further included: the UE receives the access device-specific resource information indicated by the base station. The foregoing resource information includes at least one of the following: the access device-specific scheduling assignment SA resource information, and the access device-specific data resource information. The foregoing SA resource information includes: transmission direction indication information used to indicate a data transmission direction of the access device.

In this embodiment, a UE is further provided. As shown in FIG. 4, the UE includes: a communication module 40, configured to establish device-to-device D2D communication between the UE and the access device, where the UE passes the foregoing. The access device accesses the designated network; the transceiver module 42 is connected to the communication module 40, and is configured to send data to the designated network or receive data from the specified network through the access device.

Preferably, the transceiver module 42 is configured to send or receive data to the specified network through the access device by using the backhaul mode, and may also be configured to send data to the specified network when the backhaul mode includes the following information. Receive data from the specified network: wired backhaul and/or wireless backhaul.

It should be noted that each module in the foregoing embodiment may be implemented by software or hardware. The latter can be implemented in the following manner, but is not limited thereto: the communication module 40 and the transceiver module 42 are respectively located in the first processor and the second processor, or the communication module 40 and the transceiver module 42 are located in the same processor.

In order to better understand the above embodiments, the following detailed description will be given in conjunction with the preferred embodiments. It should be noted that the access devices in the following embodiments may include, but are not limited to, a neighboring access device, a proximity forwarding or routing device, a D2D forwarding or routing device, and a D2D transmission device.

Embodiment 1

FIG. 5 is a network topology diagram of an access device supporting wired backhaul in the case of coverage by a base station, including a base station eNB, an access device, UE1 and UE2. The access device can be regarded as a special type of UE. On the one hand, the access device communicates with the UE1/UE2 through the D2D link; on the other hand, the access device passes the wired backhaul (for example, optical fiber, packet transfer network (Packet Transfer) Network, referred to as PTN, Digital Subscriber Line (DSL), Ethernet, forwards unicast data for UE1/UE2, and the access device can also distribute data in broadcast/multicast mode. 6 is a network topology diagram of an access device supporting wireless backhaul in the case of coverage by a base station, including a base station eNB, an access device, UE1 and UE2. Data communication between the access device and UE1/UE2 through the D2D link. The access device forwards unicast data to the UE1/UE2 through a wireless backhaul (for example, a microwave, a WLAN, or a cellular network), and the access device may also distribute the data in a broadcast/multicast manner. 7 is a network topology diagram of an access device supporting a wired backhaul without a base station coverage, including an access device, UE1 and UE2. Data communication between the access device and UE1/UE2 through the D2D link. The access device forwards unicast data to UE1/UE2 through wired backhaul (such as fiber, PTN, DSL, Ethernet), and the access device can also distribute data in broadcast/multicast mode. FIG. 8 is a network topology diagram of an access device supporting wireless backhaul without a base station coverage, including an access device, UE1 and UE2. The access device forwards unicast data to the UE1/UE2 through a wireless backhaul (for example, a microwave, a WLAN, or a cellular network), and the access device may also distribute the data in a broadcast/multicast manner. FIG. 9 is a schematic diagram of a network topology in which there is more than one access device under the coverage of a base station, including an eNB, an access device A, an access device B, and UE1 to UE4. The access device B and the UE1/UE2 perform data communication through the D2D link; the access device B forwards data for the UE1/UE2 through the wireless backhaul (for example, microwave, WLAN, cellular network); the access device A and the UE3/UE4 pass through The D2D link performs data communication, and the access device A forwards data for the UE3/UE4 through a wired backhaul (for example, optical fiber, PTN, DSL, Ethernet), and the access devices A and B can also distribute data in a broadcast/multicast manner. 10 is a schematic diagram of a network topology in which there is more than one access device under the coverage of a base station eNB, including access device A, access device B, and UE1 to UE4. Access device B and UE1/UE2 communicate data through the D2D link; access device B forwards data for UE1/UE2 through wireless backhaul (for example, microwave, WLAN, cellular network); access device A and UE3/UE4 communicate with each other. Through D2D link for data communication, access device A forwards data for UE3/UE4 through wired backhaul (such as fiber, PTN, DSL, Ethernet), and access device A and B can also distribute data in broadcast/multicast mode. .

11 is a simplified flowchart of a UE communicating with an access device; as shown in FIG. 11, the method includes the following steps:

Step S1102: The UE establishes D2D communication with the access device.

Step S1104: The access device forwards/routes the UE data.

FIG. 12 is a flowchart of communication between a UE and an access device covered by a base station; as shown in FIG. 12, the following steps are included:

Step S1202: The access device receives the D2D discovery resource information.

Step S1204: The UE receives D2D discovery resource information.

Step S1206: The UE receives the D2D discovery message.

Step S1208: The UE sends a measurement report to the eNB.

Step S1210: The UE receives the D2D communication setup message.

Step S1212: The access device receives the D2D communication establishment message; (the order of steps S1212 and S1210 may also be exchanged);

Step S1214: The access device receives the D2D communication resource information; (Step S1214 may also be combined with step S1212, that is, one message includes D2D communication establishment information and D2D communication resource information);

Step S1216: The UE receives the D2D Scheduling Assignment (SA) resource information; (Note: Step S1216 may be merged with step S1204, that is, the D2D discovery resource information and the scheduling assignment resource information may be combined in one message, such as a system information block. Sending and receiving in SIB);

Step S1218: The UE receives the D2D scheduling assignment (SA);

Step S1220: The UE and the access device perform D2D communication;

The embodiment is explained in detail below:

In a scenario with a base station coverage (eg, FIG. 5, FIG. 6, FIG. 9), the base station discovers resource information, such as time domain pattern information and frequency domain resource information, through air interface broadcast or unicast D2D. Access devices (or neighboring access devices, neighboring forwarding/routing devices, D2D forwarding/routing devices, or D2D transmission devices) transmit D2D discovery Interest, if required (for example, if the access device is at or near the eNB coverage edge, possibly some UEs cannot directly receive the synchronization signal from the base station, or if, for example, the D2D synchronization signal can be used to identify the type of access device) The D2D sync signal can be transmitted. The D2D discovery message carries the type of the specified network (such as the neighboring access network, the adjacent wired/wireless backhaul access network) and/or the name (for example, a neighboring access network of a company) in the D2D discovery signal. The type of the specified network that carries the access device service. The D2D synchronization signal and/or the discovery message may also carry the type of the device (including the capabilities of the device, but is not limited thereto), and includes at least one of the following: a device for distinguishing whether the device is providing forwarding (or routing/access) Indicates whether the device also provides WLAN communication (or WLAN access), an indication to distinguish different access devices (for example, whether the device supports wired backhaul or a device that supports wireless backhaul, and indicates, for example, whether to provide IP. The forwarded device, for example, indicates whether it is a public/open (or closed, semi-closed) access device). The D2D discovery message may also carry the service set identifier SSID of the WLAN (if the access device supports WLAN access), the basic service set identifies the BSSID, the carrier frequency information, and the channel channel information. The UE receives the D2D discovery message and may also include a D2D synchronization signal. The UE may identify the type and/or name of the designated network, and/or the type of access device, based on the received D2D discovery message and/or synchronization signal. For example, the value range of the synchronization signal sequence index of the access device is pre-configured to the UE or the UE through the message of the base station or the information from the core network, or the D2D discovery message carries the type of the designated network, and the access device The indication of the access device and/or the different access device, or the D2D discovery message carries the device ID (or application ID), the specific field of the ID is used to indicate the type and/or name of the specified network, and/or to distinguish the device Whether to provide forwarding devices, and/or to distinguish between different access devices.

If the UE receives the SSID/BSSID of the WLAN carried by the D2D discovery message, the UE may further establish WLAN communication with the access device, so that the UE can communicate with the access device through the LTE D2D mode and/or the WLAN mode, thereby Gain greater bandwidth and throughput, which means a better service experience. Preferably, the discovery resource information (such as time domain pattern information, frequency domain resource information) used by the base station by the air interface broadcast or unicast access device or the access device of the different designated network, and/or the synchronization signal information used by the access device (eg, the range of values of the synchronization signal sequence index of the access device) to reduce the overhead of the UE receiving and searching for the synchronization signal of the access device (or the access device of the specified network) and/or discovering the message or speeding up the reception and search. speed.

The UE measures signal strength and/or quality in the course of receiving D2D discovery messages and/or D2D synchronization signals, including D2D synchronization signals, and/or D2D discovery signals (eg, preamble and/or demodulation of D2D discovery messages) The reference signal (DeModulation Reference Signal, DMRS for short). If the D2D access device supports WLAN, the UE can further scan and measure the beacon beacon of the WLAN. The UE controls the reporting according to the base station configuration measurement event. The measurement event can be D2D. The signal measurement (eg, strength and/or quality) is higher than the sum of the signal measurement of the serving cell and the bias parameter configured by the base station, or the D2D signal measurement (eg, strength and/or quality) is higher than the threshold configured by the base station. , and / or D2D signal measurement is high The A threshold value configured in the base station and the signal measurement value of the serving cell is lower than the B threshold value configured by the base station. If the D2D access device supports the WLAN, the UE controls whether to establish communication with the WLAN according to the base station configuring the WLAN measurement event. The WLAN measurement event may also be that the signal measurement value (eg, strength and/or quality) of the WLAN is higher than the threshold value configured by the base station, and/or the WLAN signal measurement value is higher than the A threshold value configured by the base station and the signal measurement of the serving cell. The value is lower than the B threshold of the base station configuration. In order to avoid the jitter of the measured value leading to the frequent entry/exit of the measurement event, a hypothesis factor may be added to the judgment condition, for example, the condition for entering an event and the condition for leaving an event are different from the positive and negative hypothesis factor (ie, 2 hypothesis factor). . In order to smooth the measurement report, it is also possible to smoothly control the measurement, and/or set a reporting timer for the reporting of the measurement event (the report is not reported until the condition of the measurement event is exceeded for a certain period of time). Finally, after satisfying the condition of the measurement report, the UE reports a measurement report to the serving cell, where the signal measurement value (for example, the D2D signal measurement value may also carry the WLAN signal measurement value), and the received D2D synchronization signal and/or Or information about the discovery message, such as D2D synchronization signal index/identity, device identification, device type. In addition, after the conditions for establishing the WLAN communication are met, the UE may directly initiate a WLAN association process with the access device to establish WLAN communication with the access device.

The base station transmits a D2D communication establishment indication or D2D communication configuration information to the UE and the access device, including a communication type identifier (to distinguish whether it is forwarding communication), and/or a configuration related to forwarding communication (eg, an IP address allocation indication). In addition, the D2D communication configuration includes the configuration of the layer 2 (for example, a Packet Data Convergence Protocol (PDCP)/Radio Link Control (RLC)/MAC configuration), and a PHY. Configuration. The PDCP configuration may include security-related configuration information and header compression configuration information. The RLC configuration may include AM (acknowledgement mode) / UM (no acknowledgment mode) / TM (transparent mode) configuration indication, logical channel identification. The MAC configuration may include HARQ configuration information. The eNB allocates and indicates resources for transmitting the SA and performing D2D data transceiving for the access device (these resources may be access device dedicated resources, that is, the access device available resources and the UE available resources are different). These resources may be uplink resources of a Long Term Evolution (LTE) cell (for example, a certain frequency division of a frequency division duplex (FDD) uplink carrier or time division duplex (Time Division). Duplex (referred to as some uplink subframes of TDD) or downlink resources (such as certain subframes of FDD downlink carriers or certain downlink subframes or special subframes of TDD), may also be dedicated carriers (for example, dedicated to The D2D communication or the local communication, the carrier of the small-range communication) resource may also be an unlicensed spectrum (for example, shared with the WLAN). Preferably, the SA resource information includes: transmission direction indication information used to indicate a data transmission direction of the access device, such that SA resources and backwards (from the UE) of data transmitted forward (from the access device to the UE) The SA resources of the data transmitted to the access device can be separately indicated. The eNB may jointly or independently indicate resources for transmitting SA and performing D2D data transceiving, including its carrier, time domain subframe pattern (eg, period, subframe offset, bitmap), frequency domain location (eg, frequency domain offset, frequency). Domain bandwidth). The access device sends a scheduling assignment SA (or scheduling information, that is, information for indicating resource allocation and/or data transceiving parameters) according to the indicated resource (individual SA resource or SA/data joint resource) of the eNB, and the scheduling assignment includes Target identifier (eg target UE) The identifier, or the identity of the target group, or the broadcast identifier) and/or the source identifier, may also include D2D data resource information (for example, time-frequency resource information for D2D data transmission), Modulation and Coding Scheme (referred to as Modulation and Coding Scheme, for short) Indicates whether the new data or retransmission indication is for MCS) (Hybrid Automatic Repeat Request (HARQ) redundancy version, data transmission direction (for example, indicating forward/backward, to distinguish from access) Device to UE or from UE to access device).

On the UE side, the UE receives SA resource information (for example, time-frequency resource information dedicated to the access device to send the SA, and/or can be used for all D2D devices to send the time-frequency resource information of the SA) from the eNB to receive from the access device. SA. After receiving the SA according to the SA resource information, the UE determines, according to the information of the SA, whether the SA is related to itself (for example, according to a destination address or identifier in the SA information, and/or a source address or identifier), and (if related to itself) determines Where to receive / send, and specific parameters of receiving / sending. If it is determined to receive data (if the SA does not carry the transmission direction indication or the transmission direction indicates the direction from the access device to the UE), the UE performs data reception on the indicated time-frequency resource, and performs corresponding PHY/MAC/ The processing of the RLC/PDCP, for example, determines the correctness of the transport block and delivers it to the upper layer. There are three ways or a mixture of them for the UE to send data to the access device. One mode is that the access device allocates some resources to the UE and indicates to the UE through the SA (the direction of the transmission in the SA indicates the direction from the UE to the access device), so that the UE sends a resource request or a buffer status report to the access device. (For example, by way of MAC CE), the access device then further allocates resources for transmitting data to the UE. In the second mode, the UE sends a resource request or a buffer status report (for example, an RRC message or a manner of using a MAC CE) to the eNB, and then the eNB allocates resources for sending the SA and the data to the UE. In a third mode, the UE competes to obtain corresponding resources for sending SA and data from the resource pool configured by the eNB (the SA resource pool and the data resource pool), and performs SA and data transmission. After this, the UE transmits the SA and the data, and the access device receives the SA and the data.

For data transmission from the access device to the UE, the access device receives the data of the UE from the backhaul and forwards the UE data to the UE through the D2D link. The UE data received by the access device from the backhaul is IP data, such as data from the Internet or EPC (including the wired backhaul scenario of FIG. 5, or the wireless backhaul scenario of FIG. 6). To this end, after receiving the D2D communication establishment indication (including the communication type indication) of the base station, the access device allocates an IP address to the UE and sends the IP address to the UE (possibly through L2, such as MAC CE, or through the IP layer or Application layer). The access device saves the mapping relationship between the IP address of the UE and the UE ID, and sends data of different UEs received from the backhaul to the corresponding UE according to the mapping relationship.

For data transmission from the UE to the access device, the UE receives data from the IP layer (further from the upper application layer) and sends the data to the access device over the D2D link. After the access device receives the data correctly The backhaul performs forwarding/routing, for example, forwarding/routing according to the destination IP address (for example, data destined for the Internet or EPC).

Embodiment 2

FIG. 13 is a flowchart of another UE with a coverage of a base station communicating with an access device; as shown in FIG. 13, the method includes the following steps:

Step S1302: The access device receives the D2D discovery resource information.

Step S1304: The UE receives D2D discovery resource information.

Step S1306: The access device receives the D2D discovery message.

Step S1308: The access device sends a measurement report to the eNB.

Step S1310: The access device receives the D2D communication establishment indication (or communication configuration information);

Step S1312: The UE receives the D2D communication establishment indication (or communication configuration information); (the order of steps S1312 and S1310 may also be exchanged);

Step S1314: The access device receives the D2D communication resource information; (Step S1314 may also be combined with step S1310, that is, one message includes D2D communication establishment information and D2D communication resource information);

Step S1316: The UE receives the D2D Scheduling Assignment (SA) resource information; (Note: Step S1316 may be merged with step S1304, that is, the D2D discovery resource information and the scheduling assignment resource information may be combined in one message, such as a system information block. Sending and receiving in SIB);

Step S1318: The UE and the access device perform D2D communication.

The embodiment is explained in detail below:

The majority of the processes in this embodiment are similar to the first embodiment. The difference is mainly in the embodiment that the access device discovers the UE (and in the first embodiment, the UE discovers the access device), specifically, the UE sends the D2D discovery message. After receiving the access device, the access device sends a measurement report (including the UE ID) to the eNB. This may be the case when the access device enters a power-saving state (eg, the D2D discovery message is not sent or the interval between D2D discovery messages is relatively long). In addition, there is another difference in the order in which the eNB sends D2D communication configuration information to the access device and the UE. The details are explained below.

The base station discovers resource information, such as time domain pattern information and frequency domain resource information, through air interface broadcast or unicast D2D. The UE transmits a D2D discovery message. The D2D discovery message carries the type of the device, which does not include an indication to distinguish whether the device is a device providing forwarding or an indication indicating whether the device is a device providing forwarding if the indication value is false. The access device receives the D2D discovery message. The access device may identify that the type of the UE is a non-access device according to the received D2D discovery message. For example, the value range of the synchronization signal sequence index of the access device is pre-configured to the access device or is notified to the access device by the message of the base station or the information from the core network, or whether the D2D discovery message carries the access. The device ID or the D2D discovery message carries a device ID (or an application ID), and the specific field of the ID is used to distinguish whether the device is a device that provides forwarding. The D2D discovery message may also include an indication of whether the access device is looking for (eg, a certain field in the discovery message indicates that the UE is looking for an access device, or indicates that the UE requests forwarding, or the UE is a device to be forwarded), and/or The indication information used to distinguish different access devices or different specified networks, preferably, the discovery used by the base station by air interface broadcast or unicast non-access device (or further searching for the UE of the access device) Resource information (such as time domain pattern information, frequency domain resource information) to help more efficient pairing between access devices and UEs.

The access device measures signal strength and/or quality during reception of the D2D discovery message, including D2D discovery signals (eg, preamble and/or reference signal DMRS of the D2D discovery message). The access device controls the reporting according to the base station configuration measurement event. The measurement event may be that the D2D signal measurement (eg, strength and/or quality) is higher than the sum of the signal measurement of the serving cell and the bias parameter configured by the base station, or the D2D signal measurement (eg, strength and/or quality) is higher than the base station. The configured threshold value, and/or the D2D signal measurement value is higher than the A threshold value configured by the base station, and the signal measurement value of the serving cell is lower than the B threshold value configured by the base station. In order to avoid the jitter of the measured value leading to the frequent entry/exit of the measurement event, a hypothesis factor may be added to the judgment condition, for example, the condition for entering an event and the condition for leaving an event are different from the positive and negative hypothesis factor (ie, 2 hypothesis factor). . In order to smooth the measurement report, it is also possible to smoothly control the measurement, and/or set a reporting timer for the reporting of the measurement event (the report is not reported until the condition of the measurement event is exceeded for a certain period of time). Finally, after the condition of the measurement report is met, the access device reports the measurement report to the serving cell, including the signal measurement value, and also includes information from the received D2D discovery message, such as device identifier, device type. The process of establishing communication is similar to that of the first embodiment, and details are not described herein again.

Embodiment 3

14 is a flow chart of a partially covered UE communicating with an access device; as shown in FIG. 14, the method includes the following steps:

Step S1402: The access device receives the D2D discovery resource information.

Step S1404: The UE receives the D2D discovery message.

Step S1406: The UE receives the D2D discovery resource information; (Step S1406 may also be combined with step S1404, that is, one message includes D2D discovery information and D2D discovery resource information);

Step S1408: The access device receives the D2D discovery message.

Step S1410: The access device sends a measurement report to the eNB.

Step S1412: The access device receives the D2D communication establishment indication (or communication configuration information);

Step S1414: The UE receives the D2D communication establishment indication (or communication configuration information);

Step S1416: The access device receives the D2D communication resource information; (Step S1416 may also be combined with step S1412, that is, one message includes D2D communication configuration information and D2D communication resource information);

Step S1418: The UE receives the D2D communication resource information; (Step S1418 may also be combined with step S1414, that is, one message includes D2D communication configuration information and D2D communication resource information);

Step S1420: The UE and the access device perform D2D communication.

The embodiment is explained in detail below:

In a partial coverage scenario (for example, in FIG. 5, FIG. 6, and FIG. 9, the access device is under the coverage of the base station, but the UE is not under the coverage of the base station), the base station discovers resource information, such as time domain pattern information, through air interface broadcast or unicast D2D. , frequency domain resource information. The access device transmits a D2D synchronization signal and a D2D discovery message. The D2D discovery message carries the type of the specified network (such as the neighboring access network, the adjacent wired/wireless backhaul access network) and/or the name (for example, a neighboring access network of a company) in the D2D discovery signal. The type of the specified network that carries the access device service. The D2D synchronization signal and/or the discovery message may also carry the type of the device (including the capabilities of the device, but is not limited thereto), and includes at least one of the following: used to distinguish whether the device provides forwarding (also referred to as forwarding/routing). The indication of the device, whether the device provides WLAN communication (or WLAN access), the indication for distinguishing different access devices (for example, a device supporting wired backhaul, a device supporting wireless backhaul, and, for example, indicating whether to provide IP forwarding) The device, for example, indicates whether it is a public/open (or closed, semi-closed) access device). The D2D discovery message may also carry the service set identifier SSID of the WLAN (if the access device supports WLAN access), the basic service set identifies the BSSID, the carrier frequency, and the channel channel information. The UE receives the D2D synchronization signal and the D2D discovery message. The UE may identify the type and/or name of the designated network, and/or the type of access device based on the received D2D synchronization signal and/or discovery message. For example, the value range of the synchronization signal sequence index of the access device is pre-configured by the UE or stored in advance, or the D2D discovery message carries the type of the specified network, the indication of the access device, and/or the different access device. The indication, or the D2D discovery message, carries the device ID (or application ID), and the specific field of the ID is used to Indicates the type and/or name of the specified network, and/or whether the device is a device that provides forwarding, and/or is used to distinguish between different access devices. If the UE receives the SSID/BSSID of the WLAN carried by the D2D discovery message, the UE may further establish WLAN communication with the access device, so that the UE can communicate with the access device by using the LTE D2D mode and/or the WLAN mode, thereby obtaining Greater bandwidth and throughput, which means a better service experience.

The UE measures signal strength and/or quality in receiving D2D synchronization signals and/or D2D discovery messages, including D2D synchronization signals, and/or D2D discovery signals (eg, preamble and/or reference signals of D2D discovery messages) DMRS). If the D2D access device supports the WLAN, the UE can further scan and measure the beacon beacon of the WLAN. These measurements can be used to determine if an available access device is found, and the UE then determines whether to send a D2D discovery message. To this end, the UE receives D2D discovery resource information from the access device to determine or select a resource location for transmitting the D2D discovery message. Then, the UE sends a D2D discovery message, including the UE's own device ID (or plus the application ID), and the device type, which may also include the ID and/or measurement report of the discovered access device.

After receiving the D2D discovery message sent by the UE, the access device controls the reporting according to the configuration event of the base station configuration. The measurement event may be a D2D signal measurement (eg, strength and/or quality, which may be reported by the UE to the access device, or measured by the access device, or a combination of both), higher than the signal measurement of the serving cell and the base station. The sum of the configured offset parameters, or the D2D signal measurement (eg, strength and/or quality) is higher than the base station configured threshold, and/or the D2D signal measurement is higher than the base station configured A threshold and the serving cell The signal measurement is lower than the B threshold configured by the base station. If the D2D access device supports the WLAN, the UE controls whether to establish communication with the WLAN according to the base station configuring the WLAN measurement event. The WLAN measurement event may also be that the signal measurement value (eg, strength and/or quality) of the WLAN is higher than the threshold value configured by the base station, and/or the WLAN signal measurement value is higher than the A threshold value configured by the base station and the signal measurement of the serving cell. The value is lower than the B threshold of the base station configuration. In order to avoid the jitter of the measured value leading to the frequent entry/exit of the measurement event, a hypothesis factor may be added to the judgment condition, for example, the condition for entering an event and the condition for leaving an event are different from the positive and negative hypothesis factor (ie, 2 hypothesis factor). . In order to smooth the measurement report, it is also possible to smoothly control the measurement, and/or set a reporting timer for the reporting of the measurement event (the report is not reported until the condition of the measurement event is exceeded for a certain period of time). Finally, after the condition of the measurement report is met, the access device reports the measurement report to the serving cell, where the signal measurement value (for example, the D2D signal measurement value may also carry the WLAN signal measurement value), and the D2D from the received UE. Information about the discovery message, such as UE ID, device type. In addition, after the conditions for establishing the WLAN communication are met, the UE may directly initiate a WLAN association process with the access device to establish WLAN communication with the access device.

The base station sends a D2D communication establishment indication (or D2D communication configuration information) to the access device, including a communication type identifier (to distinguish whether it is forwarding communication), and/or a configuration related to forwarding communication (eg, IP address allocation) Instructions). In addition, the configuration of layer 2 (for example, configuration of PDCP/RLC/MAC), and the configuration of the PHY are included in the D2D communication configuration. The PDCP configuration may include security-related configuration information and header compression configuration information. The RLC configuration may include AM (acknowledgement mode) / UM (no acknowledgment mode) / TM (transparent mode) configuration indication, logical channel identification. The MAC configuration may include HARQ configuration information. After receiving the D2D communication configuration information, the access device sends or forwards (all or part of configuration information) to the UE, so that the UE performs configuration related to D2D communication.

The eNB allocates and indicates resources for transmitting the SA and performing D2D data transceiving for the access device (these resources may be access device dedicated resources, that is, the access device available resources and the UE available resources are different). The resources may be uplink resources of the LTE cell (such as certain subframes of the FDD uplink carrier or certain uplink subframes of the TDD) or downlink resources (such as certain subframes of the FDD downlink carrier or certain downlink subframes of the TDD or The special subframe may also be a dedicated carrier (for example, a carrier dedicated to D2D communication or local communication, small-range communication), or an unlicensed spectrum (for example, shared with a WLAN). Preferably, the SA resource information includes: transmission direction indication information used to indicate a data transmission direction of the access device, such that SA resources and backwards (from the UE) of data transmitted forward (from the access device to the UE) The SA resources of the data transmitted to the access device can be separately indicated. The eNB may jointly or independently indicate resources for transmitting SA and performing D2D data transceiving, including its carrier, time domain subframe pattern (eg, period, subframe offset, bitmap), frequency domain location (eg, frequency domain offset, frequency). Domain bandwidth). The access device sends or forwards resource information for transmitting the SA and performing D2D data transceiving to the UE. On the UE side, the UE receives the SA and the resource information for performing D2D data transceiving from the access device (for example, the time-frequency resource information dedicated to the SA and the D2D data transmission and reception, and/or dedicated to all the access devices. Sending SA and time-frequency resource information for D2D data transceiving, and/or time-frequency resource information that can be used for all D2D devices to send SA and perform D2D data transceiving), to receive SA and D2D data from the access device, or to The incoming device sends D2D data (allowing the UE to send the SA to the D2D device is optional).

The access device sends a scheduling assignment SA (or scheduling information, that is, information for indicating resource allocation and/or data transceiving parameters) according to the resource indicated by the eNB (individual SA resource or SA/data joint resource), and the target includes the target in the scheduling assignment. The identifier (eg, the identity of the target UE, or the identity of the target group, or the broadcast identity) and/or the source identity may also include D2D data resource information (eg, time-frequency resource information for D2D data transmission), modulation coding scheme MCS indication Whether new data or retransmission indication, (HARQ) redundancy version, data transmission direction (eg, indicating forward/backward, to distinguish from access device to UE or from UE to access device).

After receiving the SA according to the SA resource information, the UE determines, according to the information of the SA, whether the SA is related to itself (for example, according to a destination address or identifier in the SA information, and/or a source address or identifier), and (if related to itself) determines Where to receive / send, and specific parameters of receiving / sending. If it is determined to receive data (if the SA does not carry the transmission direction indication or the transmission direction indicates the direction from the access device to the UE), the UE performs data reception on the indicated time-frequency resource, and performs corresponding PHY/MAC/ Processing of RLC/PDCP, for example, determining The correctness of the transport block is delivered to the upper layer. There are three ways or a mixture of them for the UE to send data to the access device. One mode is that the access device allocates some resources to the UE and indicates to the UE through the SA (the direction of the transmission in the SA indicates the direction from the UE to the access device), so that the UE sends a resource request or a buffer status report to the access device. (For example, by way of MAC CE), the access device then further allocates resources for transmitting data to the UE. In another mode, the UE sends a resource request or a buffer status report (such as an RRC message or a manner of using a MAC CE) to the eNB through the access device, and then the eNB allocates resources for sending the SA and the data to the UE (related configuration information is accessed through The device forwards to the UE). In another way, the UE obtains resources from the D2D SA resource pool and the D2D communication resource pool by contention for the transmission of SA and D2D data. Thereafter, the UE transmits the SA and the data, and the access device receives the SA and the data.

For data transmission from the UE to the access device, the UE receives data from the IP layer (further from the upper application layer) and sends the data to the access device over the D2D link. After the access device correctly receives the data, it forwards/routes to the backhaul, for example, forwards/routes according to the destination IP address (for example, data destined for the Internet or EPC).

Embodiment 4

15 is a flow chart of another partially covered UE communicating with an access device; as shown in FIG. 15, the following steps are included:

Step S1502: The access device receives the D2D discovery resource information.

Step S1504: The UE receives the D2D discovery message.

Step S1506: The UE receives the D2D discovery resource information; (Step S1506 may also be combined with step S1504, that is, one message includes D2D discovery information and D2D discovery resource information);

Step S1508: The access device receives the D2D discovery message.

Step S1510: The UE receives a D2D communication establishment indication (or communication configuration information);

Step S1512: The access device sends a D2D communication establishment report to the eNB.

Step S1514: The access device receives the D2D communication resource information.

Step S1516: The UE receives D2D communication resource information.

Step S1518: The UE and the access device perform D2D communication.

The main difference between this embodiment and the third embodiment is that in this embodiment, the D2D communication establishment is initiated by the access device (in the embodiment, the D2D communication establishment is initiated by the eNB), and then notified to the eNB. Since step S1502 to step S1508 are similar to the third embodiment (steps S1402 to S1408), details are not described herein again.

After receiving the D2D discovery message (or communication establishment request) sent by the UE, the access device sends a D2D communication establishment indication (or D2D communication configuration information) to the UE, including the configuration of layer 2 (for example, PDCP/). RLC/MAC configuration), and physical layer (PHY) configuration. The PDCP configuration may include security-related configuration information and header compression configuration information. The RLC configuration may include AM (acknowledgement mode) / UM (no acknowledgment mode) / TM (transparent mode) configuration indication, logical channel identification. The MAC configuration may include Hybrid Automatic Repeat Request (HARQ) configuration information. Before or after the access device sends a communication/communication setup indication (or D2D communication configuration information) to the UE, the access device may request and receive UE communication capability information to configure communication between the two (if sent to the UE) Before the communication establishment indication) or reconfiguration (if after transmitting a communication establishment indication to the UE). After the UE receives the D2D communication/communication establishment indication (or D2D communication configuration information), optionally, the UE sends a D2D communication/communication establishment response (or D2D communication configuration completion information) to the access device to confirm communication between the two. The establishment of.

The access device then informs the eNB of the D2D communication setup with the UE, including the UE ID, and may also include D2D communication configuration information, and/or signal measurements, and/or device type of the UE. The process of the eNB for allocating the D2D communication resources to the access device and the subsequent process (steps S1514 to S1518) are similar to the third embodiment (steps S1416 to S1420), and details are not described herein again.

Embodiment 5

16 is a flowchart of communication between a UE and an access device under the coverage of an eNB-free base station; as shown in FIG. 16, the method includes the following steps:

Step S1602: The UE receives the D2D discovery message.

Step S1604: The UE sends a D2D communication establishment request (D2D discovery message);

Step S1606: The UE receives the D2D SA resource indication; (Step S1606 may also be combined with step S1602, that is, one message includes D2D discovery information and D2D SA resource information)

Step S1608: The UE receives the D2D SA.

Step S1610: The UE receives the D2D communication establishment indication (or communication configuration information);

Step S1612: The UE and the access device perform D2D communication.

The embodiment is explained in detail below:

This embodiment corresponds to a no-coverage scenario (eg, FIG. 7, FIG. 8, FIG. 10). The access device (or D2D forwarding/routing device, or D2D transmission device) transmits the D2D synchronization signal and the D2D discovery message. The D2D discovery message carries the type of the specified network (such as the neighboring access network, the adjacent wired/wireless backhaul access network) and/or the name (for example, a neighboring access network of a company) in the D2D discovery signal. The type of the specified network that carries the access device service. The D2D synchronization signal and/or the discovery message may also carry the type of the device (including the capabilities of the device, but is not limited thereto), and includes at least one of the following: used to distinguish whether the device provides forwarding (also referred to as forwarding/routing). The indication of the device, whether the device provides WLAN communication (or WLAN access), the indication for distinguishing different access devices (for example, a device supporting wired backhaul, a device supporting wireless backhaul, and, for example, indicating whether to provide IP forwarding) The device, for example, indicates whether it is a public/open (or closed, semi-closed) access device). The D2D discovery message may also carry the service set identifier SSID of the WLAN (if the access device supports WLAN access), the basic service set identifies the BSSID, the carrier frequency, and the channel channel information. The UE receives the D2D synchronization signal and the D2D discovery message. The UE may identify the type and/or name of the designated network, and/or the type of access device based on the received D2D synchronization signal and/or discovery message. For example, the value range of the synchronization signal sequence index of the access device is pre-configured by the UE or stored in advance, or the D2D discovery message carries an indication of the access device and/or an indication of a different access device, or D2D discovery. The message carries a device ID (or application ID), the specific field of the ID is used to indicate the type and/or name of the specified network, and/or whether the device is a device that provides forwarding, and/or is used to distinguish different connections. Into the device. If the UE receives the SSID/BSSID of the WLAN carried by the D2D discovery message, the UE may further establish WLAN communication with the access device, so that the UE can communicate with the access device through the LTE D2D mode and/or the WLAN mode, thereby Gain greater bandwidth and throughput, which means a better service experience.

The UE measures signal strength and/or quality in receiving D2D synchronization signals and/or D2D discovery messages, including D2D synchronization signals, and/or D2D discovery signals (eg, preamble and/or reference signals of D2D discovery messages) DMRS). If the D2D access device supports WLAN, the UE can enter one. Steps to scan and measure the beacon beacon of the WLAN. These measurements can be used to determine whether an available access device is found, and the UE then determines whether to send a D2D discovery message carrying a D2D communication setup request. The UE sends a D2D discovery message (or a communication setup request) including the UE's own device ID (or an application ID), and the device type may also include an ID and/or measurement of the access device that is discovered or requested to establish communication. report.

After receiving the D2D discovery message (or communication establishment request) sent by the UE, the access device sends a D2D communication/communication establishment indication (or D2D communication configuration information) to the UE, including the configuration of layer 2, for example, if the UE is admitted. PDCP/RLC/MAC configuration), and PHY configuration. The PDCP configuration may include security-related configuration information and header compression configuration information. The RLC configuration may include AM (acknowledgement mode) / UM (no acknowledgment mode) / TM (transparent mode) configuration indication, logical channel identification. The MAC configuration may include HARQ configuration information. Before or after the access device sends a communication/communication setup indication (or D2D communication configuration information) to the UE, the access device may request and receive UE communication capability information to configure communication between the two (if sent to the UE) Before the communication establishment indication) or reconfiguration (if after transmitting a communication establishment indication to the UE).

The D2D resource may be an uplink resource of an LTE cell (for example, an uplink subframe of an FDD uplink carrier or a TDD) or a downlink resource (for example, an uplink subframe of an FDD downlink carrier or a TDD), or may be a dedicated carrier (for example, dedicated to D2D communication or The carrier of the local communication and the small-range communication may also be an unlicensed spectrum (for example, shared with the WLAN). The access device may send resource information for transmitting the SA (or in addition to performing D2D data transceiving) to the UE. Preferably, the SA resource information includes: transmission direction indication information used to indicate a data transmission direction of the access device, such that SA resources and backwards (from the UE) of data transmitted forward (from the access device to the UE) The SA resources of the data transmitted to the access device can be separately indicated. On the UE side, the UE receives resource information of the SA (or the D2D data transmission and reception) from the access device, for example, time-frequency resource information dedicated to the SA and D2D data sent by the access device, and/or dedicated to the UE. The time-frequency resource information of the SA and D2D data) to receive SA and D2D data from the access device or to transmit D2D data to the access device (allowing the UE to send the SA to the D2D device is optional).

The access device sends a scheduling assignment SA (or scheduling information, that is, information for indicating resource allocation and/or data transceiving parameters), where the scheduling assignment includes a target identifier (eg, an identifier of the target UE, or an identifier of the target group, or a broadcast identifier) And/or source identification, which may also include D2D data resource information (eg, time-frequency resource information for D2D data transmission), modulation coding scheme MCS indication, whether new data or retransmission indication, (HARQ) redundancy version, data The direction of transmission (eg, indicating forward/backward to distinguish between accessing the UE to the UE or from the UE to the access device).

After receiving the SA according to the SA resource information, the UE determines, according to the information of the SA, whether the SA is related to itself (for example, according to the destination address or identifier in the SA information, and/or the source address or identifier), and (if with the self Relevant) Determine where to receive/send, and the specific parameters for receiving/transmitting. If it is determined to receive data (if the SA does not carry the transmission direction indication or the transmission direction indicates the direction from the access device to the UE), the UE performs data reception on the indicated time-frequency resource, and performs corresponding PHY/MAC/ The processing of the RLC/PDCP, for example, determines the correctness of the transport block and delivers it to the upper layer. There are two ways or a mixture of them for the UE to send data to the access device. One mode is that the access device allocates some resources to the UE and indicates to the UE through the SA (the direction of the transmission in the SA indicates the direction from the UE to the access device), so that the UE sends a resource request or a buffer status report to the access device. (For example, by way of MAC CE), the access device then further allocates resources for transmitting data to the UE. Alternatively, the UE obtains resources from the D2D SA resource pool and the D2D communication resource pool by contention for transmission of SA and D2D data.

For data transmission from the access device to the UE, the access device receives the data of the UE from the backhaul and forwards the UE data to the UE through the D2D link. The UE data received by the access device from the backhaul is IP data, such as data from the Internet or EPC (including the wired backhaul scenario of FIG. 7, or the wireless backhaul scenario of FIG. 8). To this end, the access device assigns an IP address to the UE and sends the IP address to the UE (possibly via L2, such as MAC CE, possibly through the IP layer or the application layer). The access device saves the mapping relationship between the IP address of the UE and the UE ID, and sends data of different UEs received from the backhaul to the corresponding UE according to the mapping relationship.

For data transmission from the UE to the access device, the UE receives data from the IP layer (further from the upper application layer) and sends the data to the access device over the D2D link. After the access device correctly receives the data, it forwards/routes to the backhaul, for example, routes the data to the Internet or EPC according to the destination IP address.

Embodiment 6

17 is a flowchart of communication between a UE and an access device under the coverage of an eNB-free base station; as shown in FIG. 17, the method includes the following steps:

Step S1702: The UE receives the D2D discovery message.

Step S1704: The UE receives the D2D discovery resource indication; (Step S1704 may also be combined with step S1702, that is, one message includes D2D discovery information and D2D discovery resource information);

Step S1706: The UE sends a D2D discovery message (D2D communication establishment request);

Step S1708: The UE receives the SA resource indication; (Step S1708 may also be combined with step S1702/1704, that is, one message includes a D2D SA resource indication and discovery information/discovery resource information);

Step S1710: The UE receives the D2D SA.

Step S1712: The UE receives the D2D communication/communication setup message.

Step S1714: The access device receives the D2D communication/communication setup response message; (Step S1714 is optional);

Step S1716: The UE and the access device perform D2D communication.

The embodiment is explained in detail below:

This embodiment corresponds to a no-coverage scenario (eg, FIG. 7, FIG. 8, FIG. 10). The access device (or D2D forwarding/routing device, or D2D transmission device) transmits the D2D synchronization signal and the D2D discovery message. The D2D discovery message carries the type of the specified network (such as the neighboring access network, the adjacent wired/wireless backhaul access network) and/or the name (for example, a neighboring access network of a company) in the D2D discovery signal. The type of the specified network that carries the access device service. The D2D synchronization signal and/or the discovery message may also carry the type of the device (including the capabilities of the device, but is not limited thereto), and includes at least one of the following: used to distinguish whether the device provides forwarding (also referred to as forwarding/routing). The indication of the device, whether the device provides WLAN communication (or WLAN access), the indication for distinguishing different access devices (for example, a device supporting wired backhaul, a device supporting wireless backhaul, and, for example, indicating whether to provide IP forwarding) The device, for example, indicates whether it is a public/open (or closed, semi-closed) access device). The D2D discovery message may also carry the service set identifier SSID of the WLAN (if the access device supports WLAN access), the basic service set identifies the BSSID, the carrier frequency, and the channel channel information. The UE receives the D2D synchronization signal and the D2D discovery message. The UE may identify the type and/or name of the designated network, and/or the type of access device based on the received D2D synchronization signal and/or discovery message. For example, the value range of the synchronization signal sequence index of the access device is pre-configured by the UE or stored in advance, or the D2D discovery message carries the type of the specified network, the indication of the access device, and/or the different access device. The indication, or the D2D discovery message, carries a device ID (or application ID), the specific field of the ID is used to indicate the type and/or name of the specified network, and/or whether the device is a device providing forwarding, and/or To distinguish between different access devices. If the UE receives the SSID/BSSID of the WLAN carried by the D2D discovery message, the UE may further establish WLAN communication with the access device, so that the UE can communicate with the access device through the LTE D2D mode and/or the WLAN mode, thereby Gain greater bandwidth and throughput, which means a better service experience.

The UE measures signal strength and/or quality in receiving D2D synchronization signals and/or D2D discovery messages, including D2D synchronization signals, and/or D2D discovery signals (eg, preamble and/or reference signals of D2D discovery messages) DMRS). If the D2D access device supports the WLAN, the UE can further scan and measure the beacon beacon of the WLAN. These measurements can be used to determine whether an available access device is found, and the UE then determines whether to send a D2D discovery message carrying a D2D communication setup request. To this end, the UE receives D2D discovery resource information from the access device to determine or select for transmitting the D2D discovery. The location of the resource. Then, the UE sends a D2D discovery message (or communication establishment request), including the UE's own device ID (or plus the application ID), and the device type may also include the ID of the access device that is discovered or requested to establish communication and/or Or measurement report.

After receiving the SA according to the SA resource information, the UE determines, according to the information of the SA, whether the SA is related to itself (for example, according to a destination address or identifier in the SA information, and/or a source address or identifier), and (if related to itself) determines Where to receive / send, and specific parameters of receiving / sending. If it is determined to receive data (if the SA does not carry the transmission direction indication or the transmission direction indicates the direction from the access device to the UE), the UE performs data reception on the indicated time-frequency resource, and performs corresponding PHY/MAC/ The processing of the RLC/PDCP, for example, determines the correctness of the transport block and delivers it to the upper layer. For the UE to send data to the access device, the access device allocates some resources to the UE and indicates to the UE through the SA (the direction of the transmission direction in the SA is the direction from the UE to the access device), so that the UE can be connected. The ingress device sends a resource request or a buffer status report (for example, by way of MAC CE), and then the access device further allocates resources for transmitting data to the UE. Alternatively, the UE obtains resources from the D2D SA resource pool and the D2D communication resource pool by contention for transmission of SA and D2D data.

After receiving the D2D discovery message (or communication establishment request) sent by the UE, the access device sends a D2D communication/communication establishment indication (or D2D communication configuration information) to the UE, including the configuration of layer 2, for example, if the UE is admitted. PDCP/RLC/MAC configuration), and PHY configuration. The PDCP configuration may include security-related configuration information and header compression configuration information. The RLC configuration may include AM (acknowledgement mode) / UM (no acknowledgment mode) / TM (transparent mode) configuration indication, logical channel identification. The MAC configuration may include HARQ configuration information. Before or after the access device sends a communication/communication setup indication (or D2D communication configuration information) to the UE, the access device may request and receive UE communication capability information to configure communication between the two (if sent to the UE) Before the communication establishment indication) or reconfiguration (if after transmitting a communication establishment indication to the UE). After the UE receives the D2D communication/communication establishment indication (or D2D communication configuration information), the UE transmits a D2D communication/communication establishment response (or D2D communication configuration completion information) to the access device to confirm the establishment of communication between the two.

It should be noted that the related technical features in the foregoing embodiments (including at least the first embodiment to the sixth embodiment) are mutually versatile in a preferred embodiment, for example, carried in the discovery message or the synchronization signal in the first embodiment. Information can be applied to the second embodiment.

In another embodiment, software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments.

In another embodiment, a storage medium is further provided, wherein the software includes the above-mentioned software, including but not limited to: an optical disk, a floppy disk, a hard disk, an erasable memory, and the like.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, thereby Storing them in a storage device is performed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that herein, or separately fabricated into individual integrated circuit modules, or Multiple of these modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

The foregoing technical solution provided by the embodiment of the present invention can be applied to the communication process of the wireless network, and the device to device (Device to Device, referred to as D2D) communication is established between the access device and the UE, and the access device passes the UE to the UE. A technical means for forwarding data from a specified network or forwarding data of a UE to a designated network, and solving technical problems such as a solution for a wireless network without planning for flexible deployment in a related art, thereby realizing flexible deployment of the wireless network, And, the network architecture is simplified.

Claims

A wireless network communication method includes:

The access device and the user equipment UE establish device-to-device D2D communication, wherein the UE accesses the designated network through the access device;

The access device forwards data from the designated network to the UE or forwards data from the UE to the designated network.
The method according to claim 1, wherein before the access device and the UE establish D2D communication, the method includes:

The access device sends a D2D synchronization signal and/or a discovery message, where the D2D discovery message carries the type and/or name of the specified network, and/or the D2D synchronization signal carries the specified network. Types of.
The method according to claim 1, wherein before the access device and the UE establish D2D communication, the method includes:

The access device sends a D2D synchronization signal and/or a discovery message, where the D2D synchronization signal and/or the discovery message carries a device type, and the device type includes: used to indicate a D2D synchronization signal and/or discovery Whether the sender of the message is an indication of the access device, and/or indication information for distinguishing different access devices.
The method according to claim 1, wherein before the access device and the UE establish D2D communication, the method includes:

The access device sends a D2D discovery message, where the D2D discovery message carries information of a wireless local area network WLAN.
The method according to claim 4, wherein the information of the WLAN comprises at least one of the following: a service set identifier SSID, a basic service set identifier BSSID, carrier frequency information, channel channel information.
The method of any of claims 2 to 5, wherein the method further comprises:

Determining, by the UE, D2D signal power and/or quality of the access device; determining whether the signal power and/or quality meets a measurement event condition configured by the base station; and if yes, transmitting a measurement report to the base station The measurement report provides a decision basis for the base station to send a D2D communication indication information.
The method of claim 6, wherein the measurement report comprises: a D2D signal measurement, the received D2D synchronization signal, and/or information in the discovery message.
The method of claim 6 wherein said measuring event condition comprises one of:

The D2D signal measurement value is higher than the sum of the signal measurement value of the serving cell and the offset parameter configured by the base station;

The D2D signal measurement value is higher than the threshold value configured by the base station;

The D2D signal measurement value is higher than the first threshold value configured by the base station and the signal measurement value of the serving cell is lower than the second threshold value configured by the base station.
The method of claim 6, wherein after transmitting the measurement report to the base station, the method further comprises:

The base station sends a D2D communication establishment indication or D2D communication configuration information to the UE and the access device, where the D2D communication establishment indication and/or the D2D communication configuration information carries: indicating whether to communicate with the designated network Communication type identification, and/or configuration information related to communication with the designated network.
The method according to claim 1, wherein before the access device and the UE establish D2D communication, the method includes:

The base station broadcasts or unicasts the discovery resource information used by the access device through the air interface, and/or the synchronization signal information used by the access device.
The method according to claim 1, wherein before the access device and the UE establish D2D communication, the method includes:

The UE sends a D2D synchronization signal and/or a discovery message, where the D2D synchronization signal and/or the discovery message carries a device type, and the device type includes: a D2D synchronization signal and/or a discovery message. Whether the sender is looking for an indication of the access device, and/or for distinguishing between indications for different access devices or different specified networks.
The method of claim 11 wherein the method further comprises:

The access device measures D2D signal power and/or quality of the UE; determines whether the signal power and/or quality meets a measurement event condition configured by the base station; and if yes, sends a measurement report to the base station The measurement report provides a decision basis for the base station to send a D2D communication indication information.
The method of claim 12 wherein said measuring event condition comprises one of:

The D2D signal measurement value is higher than the sum of the signal measurement value of the serving cell and the offset parameter configured by the base station;

The D2D signal measurement value is higher than the threshold value configured by the base station;

The D2D signal measurement value is higher than the first threshold value configured by the base station and the signal measurement value of the serving cell is lower than the second threshold value configured by the base station.
The method of claim 12, wherein after transmitting the measurement report to the base station, the method further comprises:

The base station sends a D2D communication establishment indication or D2D communication configuration information to the UE and the access device, where the D2D communication establishment indication and/or the D2D communication configuration information carries: indicating whether to communicate with the designated network Communication type identification, and/or configuration information related to communication with the designated network.
The method of claim 14, wherein after the base station sends the D2D communication establishment indication to the UE and the access device, the method further includes:

Receiving, by the access device, the D2D communication establishment indication;

The access device allocates, to the UE, an IP address that the UE communicates with the designated network, and sends the IP address.
The method of claim 1 wherein the method further comprises:

The base station broadcasts or unicasts the discovery resource information used by the UE by using an air interface, where the UE is a UE that searches for the access device or the designated network.
The method according to claim 1, wherein before the access device and the user equipment UE establish device-to-device D2D communication, the method further includes:

The UE receives resource information specific to the access device indicated by the base station.
The method of claim 17, wherein the resource information comprises at least one of:

The access device-specific scheduling assigns SA resource information, the access device-specific data resource information.
The method according to claim 18, wherein the SA resource information comprises: transmission direction indication information indicating a data transmission direction of the access device.
The method of claim 1, wherein the access device forwards data from the designated network to the UE or forwards data from the UE to the designated network, including:

The access device forwards data from the designated network or the UE through a backhaul mode.
The method of claim 20, wherein the backhaul mode comprises:

Wired backhaul and / or wireless backhaul.
A wireless network communication method includes:

The user equipment UE and the access device establish device-to-device D2D communication, wherein the UE accesses the designated network through the access device;

The UE transmits data to the designated network or receives data from the designated network through the access device.
The method according to claim 22, wherein before the UE and the access device establish D2D communication, the method includes:

Receiving, by the UE, the D2D synchronization signal and/or the discovery message sent by the access device, where the D2D discovery message carries the type and/or name of the specified network, and/or the D2D synchronization signal carries The type of the specified network.
The method according to claim 22, wherein before the UE and the access device establish device-to-device D2D communication, the method includes:

The UE receives the D2D synchronization signal and/or the discovery message sent by the access device, where the D2D synchronization signal and/or the discovery message carries a device type, and the device type includes: Whether the access device is an indication of the access device, and/or indication information for distinguishing different access devices.
The method according to claim 22, wherein before the UE and the access device establish device-to-device D2D communication, the method includes:

Receiving, by the UE, a D2D discovery message sent by the access device, where the D2D discovery message carries information of a wireless local area network WLAN.
The method according to claim 25, wherein the information of the WLAN comprises at least one of the following: a service set identifier SSID, a basic service set identifier BSSID, carrier frequency information, channel channel information.
The method of any one of claims 23 to 26, further comprising:

Determining, by the UE, D2D signal power and/or quality of the access device; determining whether the signal power and/or quality meets a measurement event condition configured by the base station; and if yes, transmitting a measurement report to the base station The measurement report provides a decision basis for the base station to send D2D indication information.
The method of claim 27, wherein the measurement report comprises: a D2D signal measurement, the received D2D synchronization signal, and/or information of the discovery message.
The method of claim 27 wherein said measuring event condition comprises one of:

The D2D signal measurement value is higher than the sum of the signal measurement value of the serving cell and the offset parameter configured by the base station;

The D2D signal measurement value is higher than the threshold value configured by the base station;

The D2D signal measurement value is higher than the first threshold value configured by the base station and the signal measurement value of the serving cell is lower than the second threshold value configured by the base station.
The method of claim 27, wherein after transmitting the measurement report to the base station, the method further comprises:

The UE receives the D2D communication establishment indication or the D2D communication configuration information that is sent by the base station, where the D2D communication establishment indication and/or the D2D communication configuration information carries: used to indicate whether the communication with the designated network is performed. A communication type identifier, and/or configuration information related to communicating with the designated network.
The method of claim 30, wherein after the UE receives the D2D communication establishment indication sent by the base station, the method further includes:

The UE receives the IP address that the access device allocates to the UE for the UE to communicate with a designated network.
The method according to claim 22, wherein before the UE and the access device establish device-to-device D2D communication, the method includes:

The UE receives discovery resource information used by the base station to broadcast or unicast the access device through an air interface, and/or synchronization signal information used by the access device.
The method of claim 32, wherein the method further comprises:

The UE receives the discovery resource information used by the base station to broadcast or unicast the UE through an air interface.
The method according to claim 22, wherein before the UE and the access device establish device-to-device D2D communication, the method further includes:

The UE receives resource information specific to the access device indicated by the base station.
The method of claim 34, wherein the resource information comprises at least one of:

The access device-specific scheduling assigns SA resource information, the access device-specific data resource information.
The method according to claim 35, wherein the SA resource information comprises: transmission direction indication information indicating a data transmission direction of the access device.
The method according to claim 22, wherein the UE transmits data to or receives data from the designated network by using the access device, including:

The UE sends or receives data to the designated network by using the backhaul mode in the backhaul mode.
The method of claim 31, wherein the backhaul mode comprises:

Wired backhaul and / or wireless backhaul.
An access device comprising:

a communication module, configured to establish device-to-device D2D communication between the access device and the user equipment UE, where the UE accesses the designated network by using the access device;

A forwarding module configured to forward data from the designated network to the UE or to forward data from the UE to the designated network.
A user equipment UE includes:

a communication module, configured to establish device-to-device D2D communication between the UE and the access device, where the UE accesses the designated network by using the access device;

And a transceiver module configured to transmit data to or receive data from the designated network through the access device.