WO2014079391A1

WO2014079391A1 - Data transmission method and related device

Info

Publication number: WO2014079391A1
Application number: PCT/CN2013/087749
Authority: WO
Inventors: 李亚娟; 常俊仁; 曾清海
Original assignee: 华为技术有限公司
Priority date: 2012-11-23
Filing date: 2013-11-25
Publication date: 2014-05-30
Also published as: CN103840927B; CN103840927A

Abstract

Disclosed are a data transmission method and a related device. A macro base station configures the length of a window, which is used to send a data packet, at a PDCP layer of the macro base station, and a micro base station configures the length of a window, which is used to send a data packet, at a PDCP layer of the micro base station, so that a sum of the configured lengths of the windows, which are used to send the data packets, at the PDCP layers of the micro base station and the macro base station equals to a reordering window of a user equipment. Alternatively, a macro base station configures the length of a window used by a user equipment to send a data packet to each communication station so that a sum of the lengths equals to the length of a reordering window of the macro base station, thereby further preventing an SN of a data packet sent by the user equipment from exceeding the length range of the reordering window at a PDCP layer of each communication station or preventing an SN of a data packet received by the user equipment from exceeding the range of the reordering window. Therefore, when multiple communication stations of the macro base station and the micro base station perform data offload in carrier convergence, data loss beyond the range of the reordering window is avoided, thereby improving the transmission rate and quality of data transmission.

Description

Data transmission method and related equipment

The present application claims the priority of the Chinese Patent Application No. 201210482597.9, entitled "Method of Data Transmission and Related Equipment", filed on November 23, 2012, the entire contents of which is incorporated herein by reference. . TECHNICAL FIELD The present application relates to the field of wireless communication technologies, and in particular, to a method and related apparatus for wireless data transmission. Background technique

In the Long Term Evolution (LTE) system, the data transmission plane can be divided into a user plane and a control plane according to the design requirements. The user plane mainly performs functions related to application layer user data transmission, including data header compression, Data security protection, scheduling and other functions; The control plane is mainly to perform operations on signaling flows that control user bearers and wireless connections, including user request services, resource allocation, and handover control functions. The interface between the base station and the user equipment is an airborne wireless interface. On the airborne wireless interface, the protocol is divided into three layers according to its functions and tasks: a physical layer, a data link layer, and a network layer. The physical layer is at the bottom of the protocol. The main task is to provide information transmission services for the upper layer and complete the basic processes such as measurement of the layer, selection of physical cells, random access, and synchronization. The physical layer transmission service is realized by transmission of certain feature data on the wireless interface, which is called a transmission channel.

The existing data link layer is divided into three sub-layers: Medium Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP). ). The network layer is divided into an Infinite Resource Control Layer (RRC) and a Non-Access Stratum (NAS). Each sub-layer in the data link layer performs different functions respectively, and the medium access control layer communicates with the physical layer below it through the transport channel in the form of primitives, and provides services to the RLC layer above it through the logical channel. The RLC layer is initially configured by the upper layer RRC layer, and then the upper and lower data is transmitted. The RLC layer has three transmission modes, namely, transparent mode, unacknowledged mode, and acknowledged mode. In the case of transparent mode, the RLC layer does not segment or cascade data. The operation does not provide functions such as error detection or sequential submission. In the control plane, the RLC layer provides signaling radio bearers (SRBs) services to the upper layer RRC layer. In the user plane, the RLC layer provides data radio bearers (DRBs) services to the upper layer PDCP layer. Secondly, the PDCP layer of the control plane provides monthly services to the upper layer RRC layer, and the PDCP layer of the user plane provides services to the application layer. The PDCP layer as the user plane plays an important role in the transmission of data packets. The PDCP layer mainly performs header compression/decompression of the data stream, security of the access layer data transmission, sequential transmission of data, and loss after reconstruction. Data retransmission and other functions.

When performing data transmission, one of the main functions of the RLC layer is segmentation and cascading, that is, according to the scheduling decision, a certain amount of data is selected from the buffer of the RLC entity as a Service Data Unit (SDU) for The SDU is split and concatenated to create a Protocol Data Unit (PDU) of the RLC layer. Each RLC layer PDU will include an RLC header, which will contain, among other elements, a Serial Number (SN) for implementing the in-order transmission and retransmission mechanism. The PDCP layer mainly receives the PDU of the PDCP-containing SN field from the lower layer RLC layer and maintains the corresponding sequence number, and then sends the processed PDU to the peer, specifically in the PDCP entity. The operation of the data is performed according to the requirements of the instance of the PDCP layer configured by the RRC layer, and the SDU data is received. Specifically, the operations performed in the PDCP entity are based on the relevant configurations of the instances, and are performed on different planes. Different bearer data performs different operations. The PDCP layer reorders and establishes data units by maintaining a Reordering Window at the sender and receiver respectively. The size of the window is 50% of the SN space range. At present, for the carrier aggregation technology between the macro base station and the micro base station, the micro base station refers to a base station with a small coverage and a small transmission power, including a home base station, a micro base station, and a radio remote unit, although the user's data throughput is improved. And reduce the system load of the macro network, however, the cooperation of receiving data packets between multiple communication sites, packet forwarding and packet shunt configuration become the most critical technical problem. According to the carrier aggregation technology, the two aggregation technologies including the same frequency and the different frequency are used to transmit data packets according to the existing interface protocol stack architecture, and when the handover state or the user equipment communicates with at least two communication sites simultaneously, the RLC layer It is impossible to guarantee the orderly submission and the discarding of duplicate packets. When the PDCP layer performs the offloading of the PDU packets, the SN of the data packets received by the user equipment from multiple communication sites is more than the reordering of the PDCP layer of the user equipment. Range of windows or user equipment to transmit PDUs When the data packet is sent to multiple communication sites, the serial number of the PDU data packet received by the communication station is beyond the reordering window of the PDCP layer of each communication station, so that the necessary data is discarded, and thus the data needs to be repeatedly transmitted until When the necessary data transfer is completed, the speed of receiving data is slowed down, and the data transmission efficiency is reduced. And, when the PDCP layer performs the offloading of the data packet of the SDU, because the attribute of the SDU is that the data is not maintained by the instance of the PDCP layer, no sorting process is performed before the SDU is transmitted, if the SDU is directly sent through the at least two communication sites. When the gateway or user equipment transmits data to the upper layer of the P DC P layer through at least two communication sites, the packet is easily out of order. If the out-of-order data packet is sent to the application layer or the core network, communication may be abnormal. The quality performance of the data transmitted by the communication network is poor, and the data transmission efficiency of the communication network is low, which affects the processing of the service. Summary of the invention

In view of this, the embodiment of the present application provides a data transmission method and related equipment, which solves the problem that the quality performance of the data transmitted by the communication network is poor and the data transmission efficiency is low.

A method for data transmission provided by the first aspect of the embodiments of the present application includes:

The macro base station configures a window length of a transmit data packet of the PDCP layer of the macro base station according to first configuration information including a window length of a transmit data packet for indicating a packet data convergence protocol PDCP layer of the macro base station;

And if it is determined that the data volume of the data packet to be sent by the macro base station is within a window length of the transmit data packet of the PDCP layer of the macro base station, sending the data packet to be sent by the macro base station to the user equipment;

And transmitting, to the micro base station, second configuration information, which is used to indicate a window length of a transmit data packet of a PDCP layer of the micro base station, to enable the micro base station to configure a PDCP of the micro base station according to the second configuration information. a window length of the layer to which the data packet is transmitted, and the micro base station determines that the data amount of the data packet to be sent by the micro base station is within a window length of a transmission data packet of the PDCP layer of the micro base station, and then sends the a data packet to be sent by the micro base station to the user equipment;

The sum of the length of the window of the PDCP layer of the macro base station and the length of the window of the PDCP layer of the micro base station is less than or equal to the reordering window of the PDCP layer of the user equipment. length.

With reference to the first aspect, in a first possible implementation, the sending includes The method further includes: before, after, or when the second configuration information of the length of the window of the PDCP layer of the base station is sent to the micro base station:

Transmitting includes configuration information for instructing the micro base station to send a data packet buffer status report to the macro base station, so that the micro base station configuration sends the parameter of the data packet buffer status report to the macro base station;

Receiving, by the micro base station, the data packet buffer status report sent according to the configuration information indicating that the micro base station sends a data packet buffer status report to the macro base station.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in a second possible implementation manner, the method further includes:

If it is determined that the data amount of the data packet to be sent by the macro base station reaches the window length of the PDCP layer transmission data packet of the macro base station, after receiving the transmission indication sent by the radio link control RLC layer of the macro base station, Sending a data packet to be sent by the macro base station to the user equipment.

With reference to the second possible implementation manner, in a third possible implementation manner, the method further includes:

Sorting the service data unit SDU of the PDCP layer to obtain the sorted SDU;

Sending the sorted SDU to the gateway.

With reference to the first aspect, in a fourth possible implementation manner, a ratio of a window length of a transmit data packet of a PDCP layer of the macro base station to a length of a window of a transmit data packet of a PDCP layer of the micro base station is equal to the macro base station and The service split ratio of the micro base station.

A second aspect of the embodiments of the present application provides a data transmission method, where the method includes: sending a window length including a PDCP layer for indicating a user equipment to send a data packet to a macro base station, and including indicating the user The PDCP layer of the device sends the configuration information of the window length of the data packet to the user equipment, so that the user equipment configures the PDCP layer of the user equipment to send data to the macro base station according to the configuration information. a window length of the packet, and a window length at which the PDCP layer of the user equipment is configured to send a data packet to the micro base station, so that the user equipment sends a data packet to the macro base station at a PDCP layer of the configured user equipment. Sending a data packet to the macro base station within a range of window lengths, and transmitting, by the user equipment, a data packet to the micrometer within a range of a window length of a PDCP layer of the configured user equipment to send the data packet to the micro base station Base station Receiving, by the user equipment, a data packet sent within a range of a window length of a data packet sent by the PDCP layer of the user equipment to the macro base station;

The sum of the window length of the PDCP layer of the user equipment transmitting the data packet to the macro base station and the window length of the PDCP layer of the user equipment transmitting the data packet to the micro base station is less than or equal to the PDCP of the macro base station. The length of the layer's reordering window.

With reference to the second aspect, in a first possible implementation, the method further includes: sorting the service data unit SDU of the PDCP layer to obtain the sorted SDU;

Sending the sorted SDU to the gateway.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation, the length of the window in which the PDCP layer of the user equipment sends the data packet to the macro base station and the PDCP layer of the user equipment The length ratio of the window for transmitting the data packet to the micro base station is equal to the service traffic split ratio sent by the user equipment to the macro base station and the micro base station.

A third aspect of the embodiments of the present application provides a data transmission method, including:

Sending configuration information to the user equipment, so that the user equipment configures a trigger condition of a status report of the PDCP layer;

Obtaining a status report of the PDCP layer that is sent by the user equipment when the trigger condition of the status report of the PDCP layer is met.

With reference to the third aspect, in a first possible implementation manner, the configuration information includes a duration of a timer of the user equipment, and a trigger condition of the status report of the PDCP layer is that the user equipment periodically periodically according to a duration of the timer. Send a status report of the PDCP layer.

A fourth aspect of the embodiments of the present application provides a data transmission method, including:

Receiving, by the micro base station, configuration information that is sent by the macro base station and includes a window length for indicating a PDCP layer of the micro base station;

And configuring, according to the configuration information, a window length of the transmit data packet of the PDCP layer of the micro base station; if determining a data volume of the data packet to be sent by the micro base station, a window length of the transmit data packet of the PDCP layer of the configured micro base station Sending, to the user equipment, the data packet to be sent by the micro base station to the user equipment, where the window length of the PDCP layer of the macro base station and the window length of the PDCP layer of the micro base station are And a length less than or equal to a reordering window of the PDCP layer of the user equipment. With reference to the fourth aspect, in a first possible implementation manner, before, or after the micro base station receives the configuration information that is sent by the macro base station and includes a window length for indicating a PDCP layer of the micro base station, The method further includes:

Receiving, by the micro base station, configuration information, configured to instruct the micro base station to send the data packet buffer status report to the macro base station;

And configuring, according to the configuration information used to instruct the micro base station to send the data packet buffer status report to the macro base station, to send, to the macro base station, a parameter of the data packet buffer status report; according to the data packet cache The parameters of the status report send the packet buffer status report to the macro base station.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the method further includes:

If it is determined that the data volume of the data packet to be sent by the micro base station reaches the window length of the PDCP layer transmission data packet configured by the micro base station, after receiving the transmission indication sent by the RLC layer of the micro base station, sending the micro The data packet to be sent by the base station to the user equipment.

With reference to the fourth aspect, in a third possible implementation manner, a length of a window of a PDCP layer of the macro base station and a length of a window of a PDCP layer of the micro base station are equal to The service offload ratio of the macro base station to the micro base station.

A fifth aspect of the embodiments of the present application provides a data transmission method, including:

Receiving, by the macro base station, a data packet transmitted within a window length of a transmit data packet of the PDCP layer of the macro base station;

Receiving, by the micro base station, a data packet sent within a window length range in which the PDCP layer of the micro base station transmits the data packet;

The sum of the length of the window of the PDCP layer of the macro base station and the length of the window of the PDCP layer of the micro base station is less than or equal to the length of the reordering window of the PDCP layer of the user equipment.

With reference to the fifth aspect, in a first possible implementation, the method further includes: sorting the SDUs of the PDCP layer to obtain the sorted SDUs. The sixth aspect of the present application provides a data transmission. Method, the method includes: Receiving, by the macro base station, a window length including a PDCP layer for instructing the user equipment to send a data packet to the macro base station, and a window for indicating that the PDCP layer of the user equipment sends a data packet to the micro base station Length configuration information;

And configuring, according to the configuration information, a window length of the PDCP layer of the user equipment to send the data packet to the macro base station, and configuring a window length of the PDCP layer of the user equipment to send the data packet to the micro base station;

Determining, in a range of a window length of a configured data packet sent by the PDCP layer of the user equipment to the macro base station, the data volume to be sent to the macro base station is sent to be sent to the a macro base station packet to the macro base station;

Determining, in a range of a window length of a configured data packet sent by the PDCP layer of the user equipment to the micro base station, the data volume to be sent to the micro base station is sent to be sent to the a data packet of the micro base station to the micro base station;

With reference to the sixth aspect, in a first possible implementation manner, the method for data transmission further includes:

If it is determined that the data amount of the data packet to be sent by the user equipment to the macro base station reaches the window length of the PDCP layer transmitting data packet of the macro base station, after receiving the transmission indication sent by the RLC layer of the user equipment, Transmitting, to the macro base station, the data packet to be sent to the macro base station;

And, if it is determined that the data volume of the data packet to be sent by the user equipment to the micro base station reaches a window length of a PDCP layer sending data packet of the micro base station, receiving the transmission sent by the RLC layer of the user equipment After the indication, the data packet to be sent to the micro base station is sent to the micro base station.

A seventh aspect of the embodiments of the present application provides a data transmission method, including:

Receiving configuration information sent by the macro base station;

And configuring, according to the configuration information, a trigger condition of a status report of the PDCP layer;

The status report of the PDCP layer is sent to the macro base station if the trigger condition of the status report of the PDCP layer is satisfied.

With reference to the seventh aspect, in a first possible implementation manner, the configuration information includes a user setting The duration of the timer of the PDCP layer is triggered by the user equipment periodically transmitting the status report of the PDCP layer according to the duration of the timer.

With reference to the seventh aspect, in a second possible implementation manner, the configuration information includes a duration of a timer of the user equipment and a preset range of the window, and a trigger condition of the status report of the PDCP layer is confirmed by the user equipment. The sequence number SN of the received data packet is outside the preset range of the window, and the acknowledgment timer is started and the timer expires.

An eighth aspect of the embodiments of the present application provides a base station, including:

a configuration unit, configured to configure a window length of a transmit data packet of a PDCP layer of the macro base station according to first configuration information including a window length of a transmit data packet used to indicate a PDCP layer of the macro base station; Whether the data amount of the data packet to be sent by the macro base station is within the window length of the configured data packet of the PDCP layer of the macro base station;

a sending unit, configured to determine, according to the determining unit, that the data amount of the data packet to be sent by the macro base station is within a window length of a configured data packet of the PDCP layer of the macro base station, and send the macro base station The data packet to be sent to the user equipment;

The sending unit is further configured to send, to the micro base station, second configuration information, which is used to indicate a window length of the transmit data packet of the PDCP layer of the micro base station, to enable the micro base station to configure the according to the second configuration information. The window length of the data packet transmitted by the PDCP layer of the micro base station, and the micro base station determines that the data volume of the data packet to be sent by the micro base station is within the window length range of the configured transmission data packet, and then sends the micro base station to be sent. Data packet to the user equipment;

With reference to the eighth aspect, in a first possible implementation, the base station further includes a receiving unit, where the sending unit is further configured to send, by the micro base station, to send the data packet to the macro base station. Cache the configuration information of the status report, to enable the micro base station to send the data packet buffer status report to the macro base station after transmitting the parameter of the data packet buffer status report to the macro base station;

The receiving unit is configured to receive, by the micro base station, the data packet buffer status report that is sent according to the configuration information that indicates that the micro base station sends a data packet buffer status report to the macro base station. With reference to the eighth aspect, or the first possible implementation manner of the eighth aspect, in the second implementation, the receiving unit is further configured to determine, according to the determining unit, the macro base Receiving, by the macro base station, a notification that the data volume of the data packet to be sent reaches a window length of the PDCP layer, and receiving a transmission indication sent by the radio link control RLC layer of the macro base station;

The sending unit is further configured to: after the radio link of the macro base station received by the receiving unit controls the transmission indication sent by the RLC layer, send the data packet to be sent by the macro base station to the user equipment.

As an optional implementation manner, the base station further includes a sorting unit;

The sorting unit is configured to sort the service data unit SDU of the PDCP layer to obtain the sorted SDU;

The sending unit is further configured to send the sorted SDU to the gateway.

As an optional implementation manner, a length ratio of a window of a PDCP layer of the macro base station to a window of a PDCP layer of the micro base station is equal to a length of the macro base station and the micro base station. Business offload ratio.

A ninth aspect of the embodiments of the present application provides a base station, including:

a sending unit, configured to send a window length that includes a PDCP layer used to indicate that the user equipment sends a data packet to the macro base station, and a PDCP layer that is used to instruct the user equipment to send a data packet to the micro base station The configuration information of the window length is configured to the user equipment, so that the user equipment configures, according to the configuration information, a window length of a PDCP layer of the user equipment to send a data packet to the macro base station, and configures a PDCP of the user equipment. Transmitting, by the layer, a window length of the data packet to the micro base station, so that the user equipment sends a data packet to the macro base within a range of a window length of the configured PDTP layer of the user equipment to send the data packet to the macro base station. And transmitting, by the user equipment, the data packet to the micro base station within a range of a window length of the PDCP layer of the user equipment that is configured to send the data packet to the micro base station;

a receiving unit, configured to receive a data packet that is sent by the user equipment in a range of a window length of a data packet sent by the PDCP layer of the user equipment to the macro base station;

The sum of the window length of the PDCP layer of the user equipment transmitting the data packet to the macro base station and the window length of the PDCP layer of the user equipment sending the data packet to the micro base station is less than or equal to The length of the reordering window of the PDCP layer of the macro base station.

As an optional implementation manner, the base station further includes:

a sorting unit, configured to sort the SDUs of the PDCP layer to obtain the sorted SDUs, and the sending unit is further configured to send the sorted SDUs to the gateway.

As an optional implementation manner, a length of a window in which the PDCP layer of the user equipment sends a data packet to the macro base station is equal to a length of a window in which the PDCP layer of the user equipment sends a data packet to the micro base station is equal to The service offload ratio of the user equipment to the macro base station and the micro base station.

A tenth aspect of the embodiments of the present application provides a base station, including:

a sending unit, configured to send configuration information to the user equipment, to enable the user equipment to configure a trigger condition of the status report of the PDCP layer;

And a receiving unit, configured to acquire a status report of the PDCP layer that is sent by the user equipment when the trigger condition of the status report of the PDCP layer is met.

As an optional implementation manner, the configuration information includes a duration of a timer, and the triggering condition of the status report of the PDCP layer is that the user equipment periodically sends the PDCP according to the duration of the timer. The status of the layer 4 obituary.

The eleventh aspect of the embodiment of the present application provides a micro base station, including:

a receiving unit, configured to receive configuration information that is sent by the macro base station and includes a window length for indicating a PDCP layer of the micro base station;

a configuration unit, configured to configure, according to the configuration information, a window length of a transmit data packet of a PDCP layer of the micro base station;

a determining unit, configured to determine whether a data volume of the data packet to be sent by the micro base station is within a window length of a transmit data packet of the PDCP layer of the micro base station;

a sending unit, configured to determine, according to the determining unit, that the data volume of the data packet to be sent by the micro base station is within a window length of a configured data packet of the PDCP layer of the micro base station, and send the micro base station The data packet to be sent to the user equipment;

The sum of the window length of the PDCP layer of the macro base station and the window length of the PDCP layer of the micro base station is less than or equal to the length of the reordering window of the PDCP layer of the user equipment. As an optional implementation manner, the receiving unit is further configured to receive configuration information, configured to instruct the micro base station to send the data packet buffer status report to the macro base station;

The configuration unit is further configured to send, according to the configuration information that is used to instruct the micro base station to send the data packet buffer status report to the macro base station, to send the data packet buffer status report to the macro base station. Parameter

The sending unit is further configured to send the data packet buffer status report to the macro base station according to the parameter of the data packet buffer status report.

As an optional implementation manner, the receiving unit is further configured to determine, according to the determining unit, that the data volume of the data packet to be sent by the micro base station reaches the PDCP layer configured by the micro base station to send a data packet. The notification of the length of the window, the transmission indication sent by the RLC layer of the micro base station is received; the sending unit is further configured to send, according to the transmission indication, a data packet to be sent by the micro base station to the user equipment.

As an optional implementation manner, a length of a window of a PDCP layer of the macro base station and a length of a window of a transmit data packet of a PDCP layer of the micro base station are equal to the macro base station and the base station. The proportion of business diversion.

A twelfth aspect of the embodiment of the present application provides a user equipment, including:

a receiving unit, configured to receive a data packet sent by the macro base station in a window length range of a PDCP layer of the macro base station; and,

The receiving unit is further configured to receive a data packet that is sent by the micro base station in a window length range of a transmit data packet of the PDCP layer of the micro base station;

The sum of the window length of the PDCP layer of the macro base station and the window length of the PDCP layer of the micro base station is less than or equal to the length of the reordering window of the PDCP layer of the user equipment.

As an optional implementation manner, the method further includes:

a sorting unit, configured to sort the SDUs of the PDCP layer to obtain the sorted SDUs;

A thirteenth aspect of the embodiments of the present application provides a user equipment, including:

a receiving unit, configured to receive, by the macro base station, a PDCP layer, configured to indicate the user equipment Sending a window length of the data packet to the macro base station, and including indicating the user equipment

The PDCP layer sends configuration information of a window length of the data packet to the micro base station;

a configuration unit, configured to configure, according to the configuration information, a window length of a PDCP layer of the user equipment to send a data packet to the macro base station, and configure a window length of the PDCP layer of the user equipment to send a data packet to the micro base station ;

a determining unit, configured to determine whether a data volume of the data packet to be sent by the user equipment to the macro base station is within a range of a window length of the configured PDCP layer of the user equipment to send the data packet to the macro base station;

a sending unit, configured to determine, according to the determining unit, a data amount of a data packet to be sent by the user equipment to the macro base station, where a PDCP layer of the configured user equipment sends a window length of a data packet to the macro base station a notification within the range, sending a data packet to be sent to the macro base station to the macro base station; and

The determining unit is further configured to determine whether a data volume of the data packet to be sent by the user equipment to the micro base station is in a range of a window length of a data packet sent by the PDCP layer of the user equipment to the micro base station. Inside;

The sending unit is further configured to determine, according to the determining unit, a data quantity of a data packet to be sent by the user equipment to the micro base station, and send a data packet to the micro base station in a PDCP layer of the configured user equipment. a notification in a range of a window length, sending a data packet to be sent to the micro base station to the micro base station;

As an optional implementation manner, the receiving unit is further configured to determine, according to the determining unit, that a data volume of a data packet to be sent by the user equipment to the macro base station reaches a PDCP layer sending data of the macro base station. Notifying the window length of the packet, receiving a transmission indication sent by the RLC layer of the user equipment;

The sending unit is further configured to send, according to the transmission indication, the data packet to be sent to the macro base station to the macro base station; and

The receiving unit is further configured to determine, according to the determining unit, that the user equipment is to be sent to the Notifying that the data volume of the data packet of the micro base station reaches the window length of the PDCP layer of the micro base station, and receiving the transmission indication sent by the RLC layer of the user equipment;

The sending unit is further configured to send, according to the transmission indication, a data packet to be sent to the micro base station to the micro base station.

A tenth aspect of the embodiment of the present application provides a user equipment, including:

a receiving unit, configured to receive configuration information sent by the macro base station;

a configuration unit, configured to configure, according to the configuration information, a trigger condition of a status report of the PDCP layer;

And a sending unit, configured to send a status report of the PDCP layer to the macro base station according to a trigger condition that the user equipment meets a status report of the PDCP layer.

As an optional implementation manner, the configuration information includes a duration of a timer of the user equipment, and the triggering condition of the status report of the PDCP layer is that the user equipment periodically sends the PDCP layer according to a duration of the timer. Status report.

As an optional implementation manner, the configuration information includes a duration of a timer of the user equipment and a preset range of the window; and a trigger condition of the status report of the PDCP layer is that the user equipment confirms the received data packet. The sequence number SN is outside the preset range of the window, and the acknowledgment timer is started and the timer expires.

The data transmission method and related device provided by the embodiment of the present application configures, by the macro base station, the transmission data of the PDCP layer of the macro base station according to the first configuration information including the window length of the transmission data packet for indicating the PDCP layer of the macro base station. a window length of the packet, so that the macro base station transmits data to the user equipment in a window length range of the PDCP layer of the configured macro base station, and sends a window including a sending data packet for indicating the PDCP layer of the micro base station. The second configuration information of the length is sent to the micro base station, so that the micro base station configures a window length of the transmit data packet of the PDCP layer of the micro base station according to the second configuration information, and the configured data is sent by the micro base station. Data is sent to the user equipment within the window length of the packet. The sum of the window length of the PDCP layer of the configured macro base station and the window length of the transmitting data packet of the micro base station in the configuration information is equal to or equal to the length of the reordering window of the user equipment, so that the macro base station and When data is shunted between multiple communication sites such as a micro base station in a handover state or carrier aggregation, the length of the reordering window of the PDCP layer of the user equipment controlled by the SN of the data packet received by the user equipment is controlled. Inside. Or controlling the user equipment to transmit data to multiple communication sites, the SN of the data packet does not exceed the length range of the reordering window of the PDCP layer of each communication station, avoiding discarding data outside the reordering window range and impeding data transmission. Transmission rate and the ability of the system to handle the business. Through the cooperation of the reordering windows of the macro base station and the micro base station, the forwarding and offload performance of the data packet is improved.

And, by acquiring the status report of the PDCP layer that is sent by the user equipment that meets the triggering condition of the status report of the PDCP layer, the scheduling policy adjustment mechanism may be started, so that the performance of the system transmission data is more flexible and improved. The universal application of data transmission systems.

And directly sending the SDU to the gateway or the user equipment by using the at least two communication sites

Before the upper layer of the PDCP layer transmits the SDU, the data is sorted and then sent to avoid the disorder of the data and improve the quality of the data transmission. DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description For some embodiments of the present application, other drawings may be obtained from those skilled in the art without departing from the drawings.

1 is a flowchart of a method for data transmission according to Embodiment 1 of the present application;

2 is a first application schematic diagram of a data transmission method according to Embodiment 1 of the present application; FIG. 3 is a second application schematic diagram of a data transmission method according to Embodiment 1 of the present application; A flow chart of a method for data transmission;

5 is a schematic diagram of application of a method for data transmission provided by Embodiment 2 of the present application;

6 is a flowchart of a method for data transmission provided by Embodiment 3 of the present application;

7 is a schematic diagram of application of a method for data transmission provided by Embodiment 3 of the present application;

8 is a flowchart of a method for data transmission provided by Embodiment 4 of the present application;

9 is a flowchart of a method for data transmission provided by Embodiment 6 of the present application;

10 is a flowchart of a method for data transmission provided in Embodiment 7 of the present application;

11 is a flowchart of a method for data transmission provided in Embodiment 8 of the present application;

FIG. 12 is a flowchart of another method for data transmission according to Embodiment 8 of the present application; FIG. 13 is a structural diagram of a base station according to Embodiment 9 of the present application; FIG. 14 is a structural diagram of a base station according to Embodiment 12 of the present application;

15 is a structural diagram of a user equipment according to Embodiment 14 of the present application;

FIG. 16 is a structural diagram of a user equipment according to Embodiment 15 of the present application. detailed description

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , FIG. 1 is a flowchart of a method for data transmission according to Embodiment 1 of the present application; FIG. 2 is a first application schematic diagram of a data transmission method according to Embodiment 1 of the present application; FIG. 3 is a second application schematic diagram of a method for data transmission according to Embodiment 1 of the present application. The data transmission method provided in this embodiment is applied to an LTE system. In the LTE system, each sub-layer in the protocol stack communicates effectively through a corresponding primitive, and the terminal and the network pass The air interface transmits messages to achieve various task functions. When a user sends data to the network or receives data from the network, a link is established between the terminal and the network, mainly through the interaction of signaling messages. The connection of the signaling is mainly performed by the control plane. After the user equipment and the network establish a signaling connection and a link, the terminal can use the resources allocated to the network to establish a dedicated channel for the effective transmission of the data service, and then the data can be transmitted, and the effective transmission of the data is passed. The user plane is completed.

The RRC layer configures the PDCP layer and the RLC layer to establish a corresponding signaling radio bearer SRB, and receives the control plane message through the SRB. Because the PDCP layer supports multiple instances, when the RRC layer configures the PDCP layer, it needs to be specific for each The PDCP instances each create a separate set of data areas to hold relevant configuration parameters and data information. The data between the instances is independent of each other, and the status does not affect each other. When the connection is established, the network initiates authentication according to the service request sent by the user, so that the user data has encryption and integrity protection functions. Then the user will activate. The PDCP layer context is sent to the network. Before the PDCP layer instance is configured, the PDCP layer instance is in the empty state. The PDCP layer instance cannot perform any operations. When receiving the configuration request information of the RRC layer, the PDCP layer will receive the PDCP layer. Information such as configuration parameters in the information is saved to its own instance. After RRC The layer configuration PDCP layer establishes the DRB, and the PDCP layer transitions to the transmission state, and then the data can be transmitted through the PDCP layer, so that data transmission between the network and the user can be performed, and data is transmitted and received. If the data transfer is completed, after receiving the released command, the corresponding resource can be released and the connection can be disconnected.

The data transmission method provided by the first embodiment is described in the perspective of a macro base station. As shown in FIG. 1 , the data transmission method provided in this embodiment includes the following steps:

S110. The macro base station configures a window length of the PDCP layer of the macro base station according to the first configuration information including the window length of the transmission data packet of the PDCP layer for indicating the macro data base station.

S120. Determine the data volume of the data packet to be sent by the macro base station, and send the data packet to be sent by the macro base station to the user equipment, within a window length of the transmit data packet of the PDCP layer of the configured macro base station.

S130: Send, to the micro base station, second configuration information, which is used to indicate a window length of the transmit data packet of the PDCP layer of the micro base station, so that the micro base station configures a window for sending the data packet of the PDCP layer of the micro base station according to the second configuration information. The length, and the micro base station determines that the data volume of the data packet to be sent by the micro base station is within the window length range of the configured transmission data packet, and then sends the data packet to be sent by the micro base station to the user equipment.

The sum of the length of the window of the PDCP layer of the configured macro base station and the length of the window of the PDCP layer of the micro base station is less than or equal to the length of the reordering window of the PDCP layer of the user equipment.

And, the ratio of the length of the window of the PDCP layer of the macro base station to the window of the PDCP layer of the micro base station may be equal to the service split ratio of the macro base station and the micro base station.

The window length of the transmitted data packet of the PDCP layer is used to determine the amount of data of the data packet to be transmitted, and the data amount exceeding the length of the window cannot currently be transmitted.

The reordering window of the PDCP layer is used to reorder and establish pairs of data units. When the amount of data received by the user equipment exceeds the reordering window of its PDCP layer, the excess data will not be processed in time.

Specifically, the macro base station has at least four methods for controlling the configuration of the macro base station and the micro base station: In the first configuration method, the macro base station configures the window length of the PDCP layer transmission data packet for the macro base station itself and the micro base station, and the macro base station and the micro base station The base station can calculate the service offload ratio according to the window length of the PDCP layer and the PDCP reordering window length of the user equipment. The second configuration method, Acer The station configures the ratio information for the macro base station itself and the micro base station, and the macro base station and the micro base station calculate the window length of the transmission data packet of the PDCP layer and the service split ratio of the macro base station itself and the micro base station according to the configured proportion information. In the third configuration method, the macro base station configures the service split ratio of the macro base station itself and the micro base station, and the macro base station and the micro base station calculate the window length of the transmit data packet of the PDCP layer configured by the macro base station itself and the micro base station according to the service split ratio. . In the fourth configuration method, the macro base station may separately configure the window length of the PDCP layer and the service split ratio for the macro base station itself and the micro base station, and there is no clear relationship between the window length of the transmitted data packet of the PDCP layer and the service split ratio.

In the data transmission method provided by this embodiment, the macro base station configures the window length of the PDCP layer of the macro base station according to the first configuration information including the window length of the transmission data packet indicating the PDCP layer of the macro base station, to And causing the macro base station to send data to the user equipment in a window length range of the transmit data packet of the PDCP layer of the configured macro base station, and send second configuration information including a window length of the transmit data packet for indicating the PDCP layer of the micro base station to the micro And the base station is configured to enable the micro base station to configure a window length of the transmit data packet of the PDCP layer of the micro base station according to the second configuration information, and send, by the micro base station, the data to the user equipment within a window length range of the configured transmit data packet. The sum of the window length of the PDCP layer of the macro base station configured in the configuration information and the window length of the transmission data packet of the micro base station is less than or equal to the length of the reordering window of the user equipment, so that the macro base station and the micro base station When a plurality of communication stations simultaneously provide a data offload service for one user equipment, the SN of the data packet received by the control user equipment is within the length of the reordering window of the PDCP layer of the user equipment. Avoid discarding data outside the reordering window and impeding the transmission rate of data transmission and the ability of the system to handle services. Through the cooperation of the configuration windows of the PDCP layer of the macro base station and the micro base station, the forwarding and offload performance of the data packet is improved.

As an optional implementation manner, before the sending, by the second configuration information, the length of the window of the transmit data packet of the PDCP layer of the micro base station to the micro base station, the method further includes:

Transmitting, including configuration information for instructing the micro base station to send a data packet buffer status report to the macro base station, to enable the micro base station to send a data packet buffer status report to the macro base station after transmitting the parameter of the data packet buffer status report to the macro base station;

Receive a packet buffer status report sent by the micro base station.

Specifically, the data packet buffer status report refers to one or more data corresponding to the micro base station. The line carries the data cache on the DRB. The packet buffer status report may include a specific buffer data size, which may be an index corresponding to the buffer amount of the data, or may be a result of comparison with a certain threshold, that is, large or small.

In this embodiment, the macro base station sends configuration information to the micro base station, so that the micro base station configures the micro base station to send a data packet buffer status report to the macro base station according to the configuration information. The macro base station can obtain the data buffer status of the micro base station, so as to start the scheduling policy adjustment mechanism, adjust the data volume of the data packet sent by the macro base station and the micro base station to the user equipment, and allocate the service offload data more quickly and reasonably, and further The performance of the system to transmit data is more flexible, and the universal application of the data transmission system is improved.

As an optional implementation manner, the data transmission method further includes:

Determining that the data amount of the data packet to be sent by the macro base station reaches the window length of the PDCP layer transmission data packet configured by the macro base station, and after receiving the transmission indication sent by the radio link control RLC layer of the macro base station, transmitting the data to be sent by the macro base station. Package to user equipment.

Or determining that the data amount of the data packet to be sent by the macro base station reaches the window length of the PDCP layer for transmitting the data packet configured by the macro base station, and after receiving the transmission indication sent by the PDCP layer of the user equipment, continuing to send the data packet to be sent by the macro base station to User equipment.

Specifically, the example is as follows: Assume that the window length of the PDCP layer of the macro base station is 10 (0-10), and the macro base station sends the data packet SN to 0-10, which has reached the window length of the PDCP layer to send the data packet. The macro base station needs to wait for the transmission indication of the RLC layer. If the macro base station receives the transmission indication of the data packet 0 sent by the RLC layer, the macro base station changes the window for transmitting the data packet of the PDCP layer to (1-11), and the macro base station can also send the data packet with the data packet SN of 11 . If the macro base station receives the transmission indication of the data packet sent by the RLC layer, the data packet sent by the macro base station has not reached the window length of the PDCP layer to send the data packet, and the macro base station needs to timely change the PDCP layer transmission of the macro base station. The window of the packet.

As an optional implementation manner, the data transmission method provided in this embodiment further includes: sorting the service data unit SDU of the PDCP layer to obtain the sorted SDU;

Send the sorted SDU to the gateway.

As an optional implementation manner, the sorting of the service data unit SDU of the PDCP layer by the sorted SDU includes:

Sorting the service data unit SDU of the PDCP layer by referring to the structure of the data packet The SDU after the order.

Specifically, for a typical IP data packet, the fields that need to be referenced include: identification, flag, and offset. The logo is 16 digits. The IP software maintains a counter in the memory. Each time a datagram is generated, the counter is incremented by one and assigned to the identification field. When the datagram needs to be fragmented, the value of this identification field is copied to the identification field of all datagrams. The value of the same identification field enables the fragmented datagrams to be correctly reloaded into the original datagram. The logo occupies 3 digits, but currently only 2 digits make sense. The lowest bit in the flag field is recorded as MF (More Fragment, MF). MF=1 means that there is a datagram followed by "and fragmentation". MF=0 means that this is the last of several datagrams. One of the middle of the flag field is marked as DF(Don, t Fragment), which means "cannot be sliced". Fragmentation is only allowed when DF=0. The slice offset is 13 bits. The slice offset indicates: the relative position of a slice in the original packet after the slice is sliced. That is, where the slice begins relative to the starting point of the user data field. The slice offset is in units of offsets of 8 bytes. That is to say, the length of each slice is an integer multiple of 8 bytes (64 bits).

In this embodiment, before the SDU is directly sent by the at least two communication stations, the processing is performed first, so that the data received by the receiving end cannot be displayed due to the out-of-order of the SDU, or the system cannot be triggered normally. data. The sorted processing improves the quality of data transmission and the performance of network communication.

As shown in FIG. 2, the method for data transmission provided by this embodiment includes three execution entities: a macro base station, a micro base station, and a user equipment. When the communication network decides to initiate the carrier aggregation mechanism for communication and data transmission, for the transmission of the downlink data, the macro base station needs to control the macro base station and the micro base station to respectively configure the instances of the respective PDCP layers. The process of configuring an instance is as follows:

S201. The macro base station configures, according to the first configuration information, a window length of a transmit data packet of a PDCP layer of the macro base station.

The first configuration information is used to indicate a window length of a transmit data packet of a PDCP layer of a packet data convergence protocol of a macro base station.

The first configuration information is generated by a macro base station. And, the macro base station can further generate second configuration information. The macro base station may generate the first configuration information and the second configuration information according to a data split ratio (or a service split ratio) between the macro base station and the micro base station.

S202. The macro base station sends the second configuration information to the micro base station. S203. The micro base station configures, according to the second configuration information, a window length of the transmit data packet of the PDCP layer of the micro base station.

The second configuration information is used to indicate the window length of the transmit data packet of the PDCP layer of the micro base station.

The purpose of step S201, step S202, and step S203 is to make the sum of the length of the window of the PDCP layer of the configured macro base station and the length of the window of the PDCP layer of the micro base station smaller than or equal to the user equipment. The length of the reordering window of the PDCP layer.

After the macro base station and the micro base station are respectively configured with the respective instances of the PDCP layer, data is transmitted on the PDCP layer according to the configured instance of the PDCP layer. The specific process of transmitting data is as follows:

5204. If the macro base station determines that the data volume of the data packet to be sent is within a window length of the transmit data packet of the PDCP layer of the configured macro base station, step S205 is performed.

The macro base station sends the data packet to be sent by the macro base station to the user equipment in the window length range of the PDCP layer of the configured macro base station.

5206. The micro base station performs step S207 if it determines that the data volume of the data packet to be sent is within the window length of the transmit data packet of the PDCP layer of the configured micro base station.

5207. The micro base station sends, to the user equipment, the data packet to be sent by the micro base station, within a window length of the transmit data packet of the PDCP layer of the configured micro base station.

Further, the sent second configuration information may further include configuration information for instructing the micro base station to send a data packet buffer status report to the macro base station, and the micro base station receives the window for indicating the sending data packet of the PDCP layer of the micro base station. The configuration information of the length is further received configuration information for instructing the micro base station to send a data packet buffer status report to the macro base station, and the micro base station is configured according to the configuration information according to the window length of the transmission data packet for indicating the PDCP layer of the micro base station. The window length of the data packet transmitted by the PDCP layer of the micro base station also needs to be configured to send a parameter of the data packet buffer status report to the macro base station. After the parameter is configured, the data packet buffer status report is sent to the macro base station, so that the macro base station can learn the data packet buffer status of the micro base station, adjust the related policy, or reconfigure the instance of the PDCP layer.

And, as shown in FIG. 3, the device involved in the data transmission method provided by this embodiment includes four execution entities: a macro base station, a micro base station, a user equipment, and a gateway. When the communication network decides to initiate carrier aggregation When the mechanism performs communication for data transmission, the macro base station controls the macro base station and the micro base station to configure respective instances of the PDCP layer. The process of configuring an instance is as follows:

The first configuration information is used to indicate a window length of a transmit data packet of a PDCP layer of a packet data convergence protocol of a macro base station. The first configuration information is generated by a macro base station. And, the macro base station can further generate second configuration information. The macro base station may generate the first configuration information and the second configuration information according to a data split ratio (or a service split ratio) between the macro base station and the micro base station.

S202. The macro base station sends the second configuration information to the micro base station.

S203. The micro base station configures, according to the second configuration information, a window length of the transmit data packet of the PDCP layer of the micro base station.

The purpose of step S201, step S202, and step S203 is to make the sum of the length of the window of the PDCP layer of the configured macro base station and the length of the window of the PDCP layer of the micro base station smaller than or equal to the user equipment. The length of the reordering window of the PDCP layer. And, the ratio of the length of the window of the PDCP layer of the macro base station to the window of the transmitting data packet of the PDCP layer of the micro base station is equal to the service split ratio of the macro base station and the micro base station.

S210. If the macro base station determines that the data volume of the data packet to be sent is not within the window length of the transmit data packet of the PDCP layer of the configured macro base station, step S211 is performed.

S211. The PDCP layer of the macro base station receives the radio link of the macro base station to control the transmission indication sent by the RLC layer.

5212. The macro base station sends a data packet to the user equipment.

5213. The micro base station sends a data packet to the user equipment.

And, when sending an SDU, perform the following process:

5214. The macro base station sorts the service data unit SDU of the PDCP layer to obtain the sorted SDU.

S215. The macro base station sends the sorted SDU to the gateway.

The execution time of step S214 and step S215 may be any time after the instance of the PDCP layer is configured, and may be performed before step S210 or before step S212. If the SDU is sent, the PDCP layer is first sorted and sorted. Then send it to the gateway.

In this embodiment, not only the macro base station and the micro base station respectively configure an instance of the range of the respective PDCP layer window, but also the PDCP layer sorting instance may be separately configured, and the two instances may be set at the same time, so that the reliability of the communication network transmission data is obtained. higher.

Optionally, the service data unit SDU of the PDCP layer is sorted, and the service data unit SDU of the PDCP layer may be sorted by referring to the structure of the data packet.

Referring to FIG. 4 and FIG. 5, FIG. 4 is a flowchart of a method for data transmission according to Embodiment 2 of the present application. FIG. 5 is a schematic diagram of application of a data transmission method according to Embodiment 2 of the present application.

The data transmission method provided in this embodiment is described by the macro base station side. As shown in FIG. 4, the data transmission method provided in this embodiment includes:

S410. The sending includes a window length for indicating that the PDCP layer of the user equipment sends the data packet to the macro base station, and configuration information that includes a window length for indicating that the PDCP layer of the user equipment sends the data packet to the micro base station to the user equipment.

The purpose of the configuration is to enable the user equipment to configure the window length of the PDCP layer of the user equipment to send the data packet to the macro base station according to the configuration information, and configure the window length of the PDCP layer of the user equipment to send the data packet to the micro base station, so as to enable the user to The device is in the PDCP layer of the configured user device to the macro The base station transmits a data packet to the macro base station within a window length of the data packet, and the user equipment transmits the data packet to the micro base station within a range of a window length of the PDCP layer of the configured user equipment to send the data packet to the micro base station.

S420. Receive a data packet sent by the user equipment in a range of a window length of a PDCP layer of the configured user equipment to send a data packet to the macro base station.

The sum of the window length of the PDCP layer of the user equipment transmitting the data packet to the macro base station and the window length of the PDCP layer of the user equipment transmitting the data packet to the micro base station is less than or equal to the length of the reordering window of the PDCP layer of the macro base station.

In this embodiment, when the macro base station sends configuration information to the user equipment to control the user equipment to transmit data to multiple communication stations, the SN of the data packet does not exceed the length range of the reordering window of the PDCP layer of each communication station, and avoids The data outside the reordering window is discarded to hinder the transmission rate of the data transmission and the ability of the system to process the service. Through the cooperation of the reordering windows of the macro base station and the micro base station, the forwarding and offload performance of the data packet is improved.

As an optional implementation manner, a length ratio of a window in which the PDCP layer of the user equipment sends a data packet to the macro base station and a window in which the PDCP layer of the user equipment sends a data packet to the micro base station is equal to that sent by the user equipment to the macro base station and the micro base station. Business offload ratio.

As an optional implementation manner, the method further includes:

Sorting the service data unit SDU of the PDCP layer to obtain the sorted SDU;

Send the sorted SDU to the gateway.

As an optional implementation manner, sorting the service data unit SDU of the PDCP layer includes:

The service data unit SDU of the PDCP layer is sorted by referring to the structure of the data packet to obtain the sorted SDU.

Specifically, for a typical IP data packet, the fields that need to be referenced include: identification, flag, offset. The identification is 16 digits. The IP software maintains a counter in memory, and each time a datagram is generated, the counter is incremented by one and assigned to the identification field. When the datagram needs to be fragmented, the value of this identification field is copied to the identification field of all datagrams. The value of the same identification field enables the fragmented data segments to be correctly reloaded into the original datagram. The flag (flag) occupies 3 digits, but currently only 2 digits make sense. The lowest bit in the flag field is MF (More Fragment). MF=1 means that there is a datagram followed by "slices,". MF=0 means that this is the last one of several datagrams. One bit in the middle of the flag field is DF(Don, t Fragment), meaning It is "cannot be sliced." Fragmentation is allowed only when DF = 0. The slice offset (offset) is 13 bits. The slice offset indicates: the relative position of a slice in the original packet after the slice is sliced. That is, the slice starts from the beginning of the user data field. The slice offset is in 8-byte offset units. That is, the length of each slice is 8 bytes (64 bits). Integer multiple.

In this embodiment, the configuration of the macro base station controls the sending of the SDU, so that before the SDU is directly sent by the at least two communication stations, the sorting process is performed to avoid the data received by the receiving end gateway due to the out-of-order of the SDU. Because it is out of order, it cannot be displayed or can not trigger the system to process data normally. The sorted processing improves the quality of data transmission and the performance of network communication.

As shown in FIG. 5, the method for data transmission provided by this embodiment includes four execution entities: a macro base station, a micro base station, a user equipment, and a gateway. When the communication network decides to initiate the carrier aggregation mechanism to perform communication for data transmission, the macro base station needs to control the user equipment to configure an instance of the PDCP layer for the transmission of the downlink data. The process of configuring an instance is as follows:

S501. The macro base station sends the first configuration information to the user equipment. The first configuration information includes a window length for indicating that the PDCP layer of the user equipment sends a data packet to the macro base station, and information including a window length for indicating that the PDCP layer of the user equipment sends the data packet to the micro base station.

S502. The user equipment configures, according to the first configuration information, a window length of the PDCP layer of the user equipment to send the data packet to the macro base station, and configures a window length of the PDCP layer of the user equipment to send the data packet to the micro base station.

The sum of the window length of the PDCP layer of the user equipment transmitting the data packet to the macro base station and the window length of the PDCP layer of the user equipment transmitting the data packet to the micro base station is less than or equal to the length of the reordering window of the PDCP layer of the macro base station. In this embodiment, the length ratio of the window in which the PDCP layer of the user equipment sends the data packet to the macro base station and the window in which the PDCP layer of the user equipment sends the data packet to the micro base station may be equal to the service traffic sent by the user equipment to the macro base station and the micro base station. proportion.

S503. The user equipment sends the data packet to the macro base station within a range of a window length of the PDCP layer of the configured user equipment to the macro base station to send the data packet.

S504. A window in which the user equipment sends a data packet to the micro base station at a PDCP layer of the configured user equipment. The data packet is sent to the micro base station within the length range.

After the PDCP layer of the user equipment is configured to send a data packet to the macro base station according to the first configuration information, and the PDCP layer of the user equipment is configured to send the data packet length to the micro base station, the execution of steps S503 and S504 is performed in no particular order. order.

S505. The macro base station sorts the SDUs of the PDCP layer to obtain the sorted SDUs.

S506. The macro base station sends the sorted SDU to the gateway.

As long as the SDU of the PDCP layer is to be sent to the gateway, the SDUs are sorted to obtain the sorted SDUs before being sent. The execution order of steps S503 and S504 is in no particular order.

For sorting the service data unit SDU of the PDCP layer, the service data unit SDU of the PDCP layer may be sorted by referring to the structure of the data packet to obtain the sorted SDU.

Referring to FIG. 6 and FIG. 7 , FIG. 6 is a flow chart of a method for data transmission according to Embodiment 3 of the present application. FIG. 7 is a schematic diagram of application of a data transmission method according to Embodiment 3 of the present application. As shown in FIG. 6, the data transmission method provided in this embodiment is described in the perspective of a macro base station. The data transmission method provided in this embodiment includes:

S610. Send configuration information to the user equipment, so that the user equipment configures a trigger condition for sending a status report of the PDCP layer.

S620. Obtain a status report of the PDCP layer that is sent by the user equipment when the trigger condition of the status report of the PDCP layer is met.

In this embodiment, the macro base station sends the configuration information to the user equipment, so that the user equipment configures the condition for transmitting the status report of the PDCP layer, and further, the status of the PDCP layer that is sent by the user equipment when the trigger condition of the status report of the PDCP layer is met is obtained. The macro base station can start the scheduling policy adjustment mechanism according to the obtained status report of the PDCP layer, so that the performance of the system transmission data is more flexible, and the universal application type of the data transmission system is improved.

As an optional implementation manner, the configuration information includes a duration of the timer of the user equipment, and the trigger condition of the user equipment to send the status report of the PDCP layer is that the user equipment periodically reports the status of the PDCP layer according to the duration of the timer.

As shown in FIG. 7, the method for data transmission provided by this embodiment includes a macro base station, a micro base station, and a user equipment. The steps performed by each device body are as follows:

S701. The macro base station sends the first configuration information to the user equipment. The first configuration information is used to indicate The user equipment configures a trigger condition for transmitting a status report of the PDCP layer. The purpose of this step is to enable the user equipment to configure a trigger condition for sending a status report of the PDCP layer, so that the user equipment sends a status report of the PDCP layer if the trigger condition is met.

S702: The user equipment configures, according to the first configuration information, a trigger condition for sending a status of the PDCP layer.

S703: The user equipment confirms that the trigger condition of the status report of the PDCP layer is met.

5704. Send a status report of the PDCP layer to the base station.

Referring to FIG. 8, FIG. 8 is a flowchart of a method for data transmission according to Embodiment 4 of the present application. The data transmission method provided in this embodiment is described in the perspective of a micro base station. As shown in FIG. 8, the data transmission method provided in this embodiment includes:

S810. The micro base station receives configuration information that is sent by the macro base station and includes a window length for indicating a PDCP layer of the micro base station.

S820. The micro base station configures a window length of the transmit data packet of the PDCP layer of the micro base station according to the configuration information.

S830. The data volume of the data packet to be sent by the micro base station is determined to be within a window length of the transmit data packet of the PDCP layer of the configured micro base station, and the data packet to be sent by the micro base station is sent to the user equipment.

The sum of the window length of the PDCP layer of the configured macro base station and the window length of the PDCP layer of the micro base station is less than or equal to the length of the PDCP layer reordering window of the user equipment.

In this embodiment, the micro base station configures the window length of the PDCP layer of the micro base station according to the configuration information, and the micro base station sends data to the user equipment within the window length of the configured transmission data packet. The sum of the window length of the PDCP layer of the macro base station configured in the configuration information and the window length of the transmission data packet of the micro base station is less than or equal to the length of the reordering window of the user equipment, so that the macro base station and the micro base station When a plurality of communication stations simultaneously provide a data offload service for one user equipment, the SN of the data packet received by the control user equipment is within the length of the reordering window of the PDCP layer of the user equipment. Avoid discarding data outside the reordering window and hinder the transmission rate of data transmission and the ability of the system to handle services. Through macro base stations and micro base stations The interaction of the configuration windows of the PDCP layer improves the forwarding and offload performance of the data packets. As an optional implementation manner, the receiving, by the micro base station, configuration information that is sent by the macro base station and includes a window length for indicating a PDCP layer configured to configure the micro base station, includes:

The micro base station receives configuration information for indicating that the configuration micro base station sends a data packet buffer status report to the macro base station;

Configuring a parameter for transmitting a data packet buffer status report to the macro base station according to configuration information including a configuration information for instructing the configuration micro base station to send a data packet buffer status report to the macro base station;

The transmit packet buffer status report is reported to the macro base station.

In this embodiment, the micro base station receives the configuration information sent by the macro base station, and the micro base station configures the micro base station to send a data packet buffer status report to the macro base station according to the configuration information, so that the macro base station obtains the data cache status of the micro base station, so as to start scheduling. The policy adjustment mechanism adjusts the data volume of the data packets sent by the macro base station and the micro base station to the user equipment respectively, and distributes the service offload data more quickly and reasonably, thereby making the performance of the system transmission data more flexible, and improving the universal application of the data transmission system. type.

As an optional implementation manner, the method further includes:

It is determined that the data volume of the data packet to be sent by the micro base station reaches the window length of the PDCP layer transmission data packet configured by the micro base station, and after receiving the transmission indication sent by the RLC layer of the micro base station, the data packet to be sent by the micro base station is sent to the user equipment.

Or determining that the data volume of the data packet to be sent by the micro base station reaches the window length of the PDCP layer configured by the macro base station, and after receiving the transmission indication sent by the PDCP layer of the user equipment, continuing to send the data packet to be sent by the micro base station to User equipment.

As an optional implementation manner, the ratio of the length of the window of the PDCP layer of the macro base station to the window of the transmitting data packet of the PDCP layer of the micro base station is equal to the ratio of the service of the macro base station to the micro base station.

A data transmission method provided in Embodiment 5 of the present application is described in the perspective of a micro base station, and the data transmission method provided in this embodiment includes:

And receiving a data packet sent by the user equipment in a range of a window length of a PDCP layer of the configured user equipment to send a data packet to the micro base station.

The user equipment sends a PDCP layer to the macro according to the macro base station, which is used to indicate the user equipment. a window length of the base station transmitting the data packet, and configuration information including a window length for indicating that the PDCP layer of the user equipment sends the data packet to the micro base station, configuring a window length of the PDCP layer of the user equipment to send the data packet to the macro base station, and configuring the user equipment The PDCP layer sends the window length of the data packet to the micro base station, so that the user equipment sends the data packet to the macro base station within the range of the window length of the configured PDTP layer of the user equipment to the macro base station, and is configured by the user equipment. The PDCP layer of the user equipment sends a data packet to the micro base station within a window length of the data packet sent by the micro base station; wherein, the PDCP layer of the user equipment sends the window length of the data packet to the macro base station and the PDCP layer of the user equipment to the micro base station The sum of the window lengths of the transmitted data packets is less than or equal to the length of the reordering window of the PDCP layer of the macro base station.

The data transmission method provided in this embodiment can receive the data packet sent by the user equipment in the range of the window length of the PDCP layer of the configured user equipment to send the data packet to the micro base station, and the received data packet can be avoided. The PDCP layer of the base station is within the reordering window range, and the necessary data is lost. That is, when controlling the user equipment to transmit data to multiple communication sites, the SN of the data packet does not exceed the length range of the reordering window of the PDCP layer of each communication station, and the data outside the reordering window range is discarded to avoid data transmission. Transmission rate and the ability of the system to handle the business. Through the cooperation of the reordering windows of the macro base station and the micro base station, the forwarding and offload performance of the data packet is improved.

Referring to FIG. 9, FIG. 9 is a flowchart of a method for data transmission according to Embodiment 6 of the present application. The data transmission method provided in this embodiment is described in the perspective of the user equipment. As shown in FIG. 9, the data transmission method provided in this embodiment includes:

S910. Receive a data packet sent by the macro base station in a window length range of a PDCP layer of the configured macro base station.

And S920, receiving a data packet sent by the micro base station within a window length range of the configured transmission data packet.

The sum of the window length of the PDCP layer of the configured macro base station and the window length of the PDCP layer of the micro base station is less than or equal to the length of the reordering window of the PDCP layer of the user equipment.

The window length of the transmitted data packet of the PDCP layer is used to determine the amount of data of the data packet to be transmitted. Small, the amount of data beyond the length of the window cannot currently be sent.

The data transmission method provided by the embodiment, the user equipment receives the data packet sent by the macro base station in the window length range of the PDCP layer of the configured macro base station, and receives the data packet of the micro base station in the configured sending data packet. The data packet sent in the length range is smaller than or equal to the reordering window of the user equipment according to the sum of the window length of the PDCP layer of the macro base station configured according to the configuration information and the window length of the transmitting data packet of the micro base station. The length, when multiple communication stations such as the macro base station and the micro base station simultaneously provide a data offload service for one user equipment, the SN of the data packet received by the control user equipment is within the length of the reordering window of the PDCP layer of the user equipment. Avoid discarding data outside the reordering window and impeding the transmission rate of data transmission and the ability of the system to process traffic. Through the mutual cooperation of the configuration windows of the PDCP layer of the macro base station and the micro base station, the forwarding and offload performance of the data packet is improved.

Sorting the SDUs of the PDCP layer to obtain the sorted SDUs;

The sorted SDUs are sent to the upper layers relative to the PDCP layer.

As an optional implementation manner, the SDUs of the PDCP layer are sorted to obtain the sorted SDUs, and the service data unit SDUs of the PDCP layer may be sorted to obtain the sorted SDUs by referring to the structure of the data packets.

Specifically, for a typical IP data packet, the fields that need to be referenced include: identification, flag, offset. The identification is 16 digits. The IP software maintains a counter in memory, and each time a datagram is generated, the counter is incremented by one and assigned to the identification field. When the datagram needs to be fragmented, the value of this identification field is copied to the identification field of all datagrams. The value of the same identification field enables the fragmented data segments to be correctly reloaded into the original datagram. The flag (flag) occupies 3 digits, but currently only 2 digits make sense. The lowest bit in the flag field is MF (More Fragment). MF=1 means that there is a datagram followed by "slices,". MF=0 means that this is the last one of several datagrams. One bit in the middle of the flag field is DF(Don, t Fragment), meaning Is "cannot be sliced". Only allowed when DF=0 Fragmentation. The slice offset (offset) occupies 13 bits. The slice offset indicates: the relative position of a slice in the original packet after the slice is sliced. That is, where the slice begins relative to the starting point of the user data field. The slice offset is in 8-byte offset units. That is to say, the length of each slice is an integer multiple of 8 bytes (64 bits).

In this embodiment, after the SDU is sorted, the user equipment sends the SDU to the upper layer of the multiple communication sites, and then performs the sorting process of the PDCP layer to avoid the disordered sequence of the SDU, which may cause the data received by the receiving end to be out of order. Cannot display or trigger the system to process data normally. The sorted processing improves the quality of data transmission and the performance of network communication.

Referring to FIG. 10, FIG. 10 is a flowchart of a method for data transmission according to Embodiment 7 of the present application. The data transmission method provided in this embodiment is described in the perspective of the user equipment. As shown in FIG. 10, the data transmission method provided in this embodiment includes:

S1010. The receiving, by the receiving macro base station, includes a window length for indicating that the PDCP layer of the user equipment sends a data packet to the macro base station, and configuration information that includes a window length for indicating that the PDCP layer of the user equipment sends the data packet to the micro base station.

S1020: Configure a window length of the data packet sent by the PDCP layer of the user equipment to the macro base station according to the configuration information, and configure a window length of the data packet sent by the PDCP layer of the user equipment to the micro base station.

S1030: Determine a data volume of a data packet to be sent by the user equipment to the macro base station, in a range of a window length of the configured user equipment, where the PDCP layer sends the data packet to the macro base station, send the data packet to be sent to the macro base station to the Acer station. as well as,

S1040. Determine a data volume of a data packet to be sent by the user equipment to the micro base station, and send a data packet to be sent to the micro base station to the micro base station in a range of a window length of the PDCP layer of the configured user equipment to send the data packet to the micro base station. .

The data transmission method provided in this embodiment, the user equipment receives the configuration information sent by the macro base station, configures the window length of the PDCP layer of the user equipment to send the data packet to the macro base station, and configures the PDCP layer of the user equipment to send data to the micro base station. The window length of the packet, so that when the user equipment transmits data to multiple communication sites, the SN of the transmitted data packet does not exceed the rearrangement of the PDCP layer of each communication site. The length of the sequence window avoids the ability of each communication station to discard data outside the reordering window and hinder the transmission rate of the data transmission and the ability of the system to process the service. Through the cooperation of the reordering windows of the macro base station and the micro base station, the forwarding and offload performance of the data packet is improved.

Determining, by the user equipment, that the data volume of the data packet to be sent to the macro base station reaches the window length of the PDCP layer of the macro base station, and after receiving the transmission indication sent by the RLC layer of the user equipment, sending the data packet to be sent to the macro base station. To macro base station;

And determining that the data volume of the data packet to be sent by the user equipment to the micro base station reaches the window length of the PDCP layer transmitting data packet of the micro base station, and after receiving the transmission indication sent by the RLC layer of the user equipment, transmitting the data to the micro base station.

Referring to FIG. 11, FIG. 11 is a flowchart of a method for data transmission according to Embodiment 8 of the present application. The data transmission method provided in this embodiment is described in the perspective of the user equipment. As shown in FIG. 11, the data transmission method provided in this embodiment includes:

S1110. Receive configuration information sent by a macro base station.

S 1120. Configure a state of the PDCP layer according to the configuration information. 4 a trigger condition of the advertisement;

S1130: Send a status report of the PDCP layer to the macro base station when the trigger condition of the status 4 of the PDCP layer is satisfied.

In this embodiment, the user equipment receives the configuration information sent by the macro base station, and configures a condition for transmitting the status report of the PDCP layer, so that the macro base station can obtain the PDCP layer that is sent by the user equipment when the trigger condition of the status report of the PDCP layer is met. The status report, the macro base station can start the scheduling policy adjustment mechanism according to the obtained status report of the PDCP layer, so that the performance of the system transmission data is more flexible, and the universal application type of the data transmission system is improved.

As an optional implementation manner, the configuration information includes the duration of the timer of the user equipment, and the triggering condition of the status report of the PDCP layer is that the user equipment periodically sends the status report of the PDCP layer according to the duration of the timer, and the PDCP layer is satisfied. The status report of the PDCP layer sent to the macro base station in the case of the trigger condition of the status report includes:

Start the timer;

The status of the PDCP layer is periodically transmitted to the macro base station according to the duration of the timer.

Referring to FIG. 12, FIG. 12 is a flowchart of another method for data transmission according to Embodiment 8 of the present application. Figure. The flowchart of the method for data transmission provided in this embodiment is based on the further preferred technical solution of FIG. 11 and is described in the perspective of the user equipment. As shown in FIG. 12, in this implementation manner, the configuration information includes the timing of the user equipment. The duration of the device and the preset range of the window; the trigger condition of the status report of the PDCP layer is that the user equipment confirms that the serial number SN of the received data packet is outside the preset range of the window, and the trigger that the timer is started and the timer expires Condition, the status report of transmitting the PDCP layer to the macro base station in the case of satisfying the trigger condition of the status report of the PDCP layer includes:

S 1131. The user equipment determines whether the SN of the received data packet is outside the preset range of the window.

51132. If the user equipment determines that the SN of the received data packet is in a preset range of the window, the user equipment determines whether the timer is started. If the user equipment determines that the timer has not been started, step S1133 is performed. If the user equipment determines that the timer has been started, step S1134 is performed.

51133. Send a status report of the PDCP layer to the macro base station, and start or restart the timer. After executing step S1133, the process goes to step S1131 to start a new process, which is to determine whether the SN of the next received packet is outside the preset range of the window.

51134. Determine whether the timer expires. If the user equipment judges that the timer has timed out, step S1133 is performed.

As an optional implementation manner, in the foregoing step S1134, if the user equipment determines that the timer does not time out, the method further includes:

The user equipment continues to determine if the SN of the next received packet is outside the preset range of the window.

As an optional implementation manner, in the foregoing step S1131, if the user equipment determines that the SN of the received data packet is not outside the preset range of the window, the method further includes:

The preset range of the user equipment setting window, and continues to determine whether the SN of the next received packet is outside the preset range of the window.

In summary, the data transmission method provided by the embodiment of the present application configures, by the macro base station, a window for transmitting a data packet of a PDCP layer of a macro base station according to configuration information including a window length of a transmission data packet for indicating a PDCP layer of the macro base station. a length, in which the macro base station transmits data to the user equipment within a window length of the PDCP layer of the configured macro base station, and sends configuration information including a window length for indicating a PDCP layer of the micro base station to the transmission data packet. a micro base station, so that the micro base station configures a window length of the PDCP layer of the micro base station according to the configuration information, and is configured by the micro base. The data is sent to the user equipment within the window length of the configured transmit data packet. The sum of the window length of the PDCP layer of the macro base station configured in the configuration information and the window length of the transmission data packet of the micro base station is less than or equal to the length of the reordering window of the user equipment, so that the macro base station and the micro base station When the data is shunted in the case of switching states or carrier aggregation between the plurality of communication sites, the SN of the data packet received by the user equipment is controlled within the length of the reordering window of the PDCP layer of the user equipment. Or when controlling the user equipment to transmit data to multiple communication sites, the SN of the data packet does not exceed the length range of the reordering window of the PDCP layer of each communication station, thereby avoiding discarding data outside the reordering window range and obstructing data transmission. Transmission rate and the ability of the system to handle the business. Through the cooperation of the reordering windows of the macro base station and the micro base station, the forwarding and offload performance of the data packet is improved.

And, by acquiring a status report of the PDCP layer that is sent by the user equipment to meet the trigger condition of the status report of the PDCP layer, the scheduling policy adjustment mechanism may be started, so that the performance of the system transmission data is more flexible, and the data transmission system is generally popular. Application Type.

And before the SDU is directly sent by the at least two communication sites to the gateway or the user equipment to transmit the SDU to the upper layer of the PDCP layer, the data is sorted and then sent, thereby avoiding the disorder of the data and improving the quality of the data transmission.

Referring to FIG. 13, FIG. 13 is a structural diagram of a base station according to Embodiment 9 of the present application. The base station provided in this embodiment is a macro base station. As shown in FIG. 13, the base station provided in this embodiment includes: a configuration unit 130, a determining unit 131, and a sending unit 132.

The configuration unit 130 is configured to configure a window length of the transmit data packet of the PDCP layer of the macro base station according to the first configuration information including the window length of the transmit data packet for indicating the PDCP layer of the macro base station.

The determining unit 131 is configured to determine whether the data volume of the data packet to be sent by the macro base station is within a window length of the transmit data packet of the PDCP layer of the configured macro base station.

The sending unit 132 is configured to: according to the determining, by the determining unit 131, that the data amount of the data packet to be sent by the macro base station is within the window length of the PDCP layer of the configured macro base station, send the data packet to be sent by the macro base station to User equipment.

The sending unit 132 is further configured to send, to the micro base station, the second configuration information that includes a window length of the transmit data packet of the PDCP layer of the micro base station, so that the micro base station configures the micro according to the second configuration information. The window length of the data packet transmitted by the PDCP layer of the base station, and the micro base station determines that the data volume of the data packet to be sent by the micro base station is within the window length range of the configured transmission data packet, and sends the data packet to be sent by the micro base station to the user. device.

And, the ratio of the length of the window of the PDCP layer of the macro base station to the window of the PDCP layer of the micro base station may be equal to the service split ratio of the macro base station and the micro base station. The window length of the transmitted data packet of the PDCP layer is used to determine the amount of data of the data packet to be transmitted, and the data amount exceeding the length of the window cannot currently be transmitted.

The configuration unit may be a processor. In this embodiment, the configuration unit may be configured to configure, according to the first configuration information that includes the window length of the transmit data packet of the PDCP layer of the macro base station, the transmit data packet of the PDCP layer of the macro base station. The length of the window. The determining unit may be another processor, and may be configured to determine whether the data volume of the data packet to be sent by the macro base station is within a window length of the PDCP layer of the configured macro base station. The sending unit may be a radio frequency device, and may be configured to send, according to the data volume of the data packet to be sent by the macro base station, a determination notification within a window length range of the PDCP layer of the configured macro base station, and send the data to be sent by the macro base station. Package to user equipment. These processors or device units can be implemented by logic integrated circuits.

In another possible embodiment, the macro base station provided in this embodiment configures the PDCP layer of the macro base station according to the first configuration information including the window length of the transmission data packet indicating the PDCP layer of the macro base station by the configuration unit 130. Transmitting the window length of the data packet, so that the transmitting unit 132 of the macro base station transmits data to the user equipment in the window length range of the PDCP layer of the configured macro base station, and sends the data to the user equipment through the sending unit 132. The second configuration information of the window length of the transmit data packet of the PDCP layer of the base station is sent to the micro base station, so that the micro base station configures the window length of the transmit data packet of the PDCP layer of the micro base station according to the second configuration information, and is configured by the micro base station. Send data to the user device within the window length of the transmitted packet. The macro base station defined in the configuration information is configured. The sum of the window length of the transmitting data packet of the PDCP layer and the window length of the transmitting data packet of the micro base station is less than or equal to the length of the reordering window of the user equipment, so that multiple communication stations such as the macro base station and the micro base station are simultaneously one user equipment. When the data offloading service is provided, the SN that controls the data packet received by the user equipment is within the length of the reordering window of the PDCP layer of the user equipment. Avoid discarding data outside the reordering window and hinder the transmission rate of data transmission and the ability of the system to handle services. Through the cooperation of the configuration windows of the PDCP layer of the macro base station and the micro base station, the forwarding and offload performance of the data packet is improved.

As an optional implementation manner, the foregoing base station further includes a receiving unit.

The sending unit is further configured to: send configuration information, configured to instruct the micro base station to send a data packet buffer status report to the macro base station, to enable the micro base station to send a data packet buffer status after sending the parameter of the data packet buffer status report to the macro base station. Report to the macro base station.

And a receiving unit, configured to receive, by the micro base station, a data packet buffer status report that is sent according to configuration information that indicates that the micro base station sends a data packet buffer status report to the macro base station.

Specifically, the data packet buffer status report refers to a data cache situation on one or more data radio bearers DRB corresponding to the micro base station, and the data packet buffer status report may include a specific cache data size, which may be a data cache amount corresponding to The index can also be the result of comparison with a certain threshold, that is, large or small.

The receiving unit may be a radio frequency receiving device.

In this embodiment, the transmitting unit of the macro base station sends the configuration information to the micro base station, so that the micro base station configures the micro base station to send a data packet buffer status report to the macro base station according to the configuration information, so that the receiving unit of the macro base station can obtain the data cache of the micro base station. The status of the situation, so that the macro base station starts the scheduling policy adjustment mechanism, adjusts the data volume of the data packets sent by the macro base station and the micro base station to the user equipment, and distributes the service offload data more quickly and reasonably, thereby making the performance of the system transmission data more flexible. Improve the universal application of data transmission systems.

As an optional implementation manner, the receiving unit is further configured to: according to the determining, determine, by the determining unit, that the data volume of the data packet to be sent by the macro base station reaches a window length of the PDCP layer to send the data packet configured by the macro base station, and receive the wireless of the macro base station. The link controls the transmission indication sent by the RLC layer.

The sending unit is further configured to: after receiving the transmission indication sent by the RLC layer of the radio link of the macro base station received by the receiving unit, send the data packet data to be sent by the macro base station to the user equipment. Or the receiving unit is further configured to: determine, according to the determining unit, that the data amount of the data packet to be sent by the macro base station reaches a window length of the PDCP layer that is configured by the macro base station, and after receiving the transmission instruction sent by the PDCP layer of the user equipment, continue Sending a data packet to be sent by the macro base station to the user equipment.

As an optional implementation manner, the foregoing base station further includes a sorting unit.

The sorting unit is configured to sort the service data unit SDUs of the PDCP layer to obtain the sorted SDUs.

The sending unit is further configured to send the sorted SDU to the gateway.

The sorting unit may be another microprocessor for sorting the service data unit SDUs of the PDCP layer to obtain the sorted SDUs.

In this embodiment, the SDU is processed by the sorting unit, so that the SDU is directly sent by the at least two communication stations to the gateway, and then the PDCP layer of the macro base station is sorted to avoid receiving the out-of-order of the SDU. The data cannot be displayed because it is out of order or cannot trigger the system to process data normally. The sorted processing improves the quality of data transmission and the performance of network communication.

The base station provided in Embodiment 10 of the present application is a macro base station, and the base station provided in this embodiment includes a sending unit and a receiving unit.

The sending unit is configured to send a window length including a PDCP layer for instructing the user equipment to send a data packet to the macro base station, and configuration information including a window length for indicating that the PDCP layer of the user equipment sends the data packet to the micro base station to And the user equipment, so that the user equipment configures, according to the configuration information, a window length of the PDCP layer of the user equipment to send the data packet to the macro base station, and configures a window length of the PDCP layer of the user equipment to send the data packet to the micro base station. Transmitting, by the user equipment, the data packet to the macro base station within a range of a window length of the PDCP layer of the configured user equipment to the macro base station, and transmitting, by the user equipment, the data packet to the micro base station by the user equipment at the PDCP layer of the configured user equipment. The data packet is sent to the micro base station within the range of the window length.

And a receiving unit, configured to receive a data packet sent by the user equipment in a range of a window length of the PDCP layer of the user equipment to send the data packet to the macro base station.

The sum of the window length of the PDCP layer of the user equipment transmitting the data packet to the macro base station and the window length of the PDCP layer of the user equipment transmitting the data packet to the micro base station is less than or equal to the length of the reordering window of the PDCP layer of the macro base station. And, the length ratio of the length of the window in which the PDCP layer of the user equipment sends the data packet to the macro base station and the window in which the PDCP layer of the user equipment sends the data packet to the micro base station is equal to the service offload ratio sent by the user equipment to the macro base station and the micro base station.

The sending unit in this embodiment may be a radio frequency transmitting device, and the receiving unit may be a radio frequency receiving device, and may perform circuit connection according to the foregoing logical relationship to send configuration information to the user equipment, so that the user equipment transmits data to multiple communication stations. When the SN of the data packet does not exceed the length of the reordering window of the PDCP layer of each communication station. These processors or device units can be implemented by logic integrated circuits.

The macro base station provided in this embodiment sends configuration information to the user equipment by the sending unit, to control the user equipment to transmit data to multiple communication stations, and the SN of the data packet does not exceed the length range of the reordering window of the PDCP layer of each communication station. Avoid discarding data outside the reordering window and hinder the transmission rate of data transmission and the ability of the system to process services. Through the cooperation of the reordering windows of the macro base station and the micro base station, the forwarding and offload performance of the data packet is improved.

The sorting unit is configured to sort the SDUs of the PDCP layer to obtain the sorted SDUs. The sending unit is further configured to send the sorted SDU to the gateway.

The base station provided in Embodiment 11 of the present application is a macro base station, and the base station provided in this embodiment includes a sending unit and a receiving unit.

The sending unit is configured to send configuration information to the user equipment, so that the user equipment configures a trigger condition of the status of the PDCP layer.

The receiving unit is configured to obtain a state 4 report of the PDCP layer that is sent by the user equipment when the trigger condition of the status report of the PDCP layer is met. The sending unit in this embodiment may be a radio frequency transmitting device, and the receiving unit may be a radio frequency receiving device, and may be connected according to the foregoing logical relationship, and the processor or the device unit may be implemented by a logic integrated circuit.

In this embodiment, the sending unit of the macro base station sends the configuration information to the user equipment, so that the user equipment configures the condition for transmitting the status report of the PDCP layer, and further, the receiving unit of the macro base station can obtain the trigger condition of the status report of the user equipment that satisfies the PDCP layer. If the status report of the PDCP layer is sent, the macro base station can start the scheduling policy adjustment mechanism according to the obtained status report of the PDCP layer, so that the performance of the system transmission data is more flexible, and the universal application type of the data transmission system is improved.

As an optional implementation manner, the configuration information includes the duration of the timer, and the triggering condition of the status report of the PDCP layer is that the user equipment periodically reports the status of the PDCP layer according to the duration of the timer.

Referring to FIG. 14, FIG. 14 is a structural diagram of a base station according to Embodiment 12 of the present application. The base station provided by this embodiment is a type of micro base station. As shown in FIG. 14, the micro base station provided in this embodiment includes a receiving unit 140, a configuration unit 141, a determining unit 142, and a sending unit 143.

The receiving unit 140 is configured to receive configuration information that is sent by the macro base station and includes a window length for indicating a PDCP layer of the micro base station.

The configuration unit 141 is configured to configure, according to the configuration information, a window length of the transmit data packet of the PDCP layer of the micro base station.

The determining unit 142 is configured to determine whether the data volume of the data packet to be sent by the micro base station is within a window length of the transmit data packet of the PDCP layer of the micro base station.

The sending unit 143 is configured to: according to the determining, by the determining unit 142, that the data volume of the data packet to be sent by the micro base station is within the window length of the PDCP layer of the configured micro base station, send the data packet to be sent by the micro base station to User equipment.

The configuration unit may be a processor, and the determining unit may be another processor. The above transmitting unit may be a radio frequency device. These processors or device units can be implemented by a logic integrated circuit that performs circuit connections in accordance with the above described logical relationships.

In this embodiment, the receiving unit 140 of the micro base station receives the configuration information sent by the macro base station, so that the configuration unit 141 configures the window length of the transmission data packet of the PDCP layer of the micro base station, and is configured by the sending unit 143 of the micro base station. Send data to the user device within the window length of the transmitted packet. The sum of the window length of the PDCP layer of the macro base station configured in the configuration information and the window length of the transmission data packet of the micro base station is less than or equal to the length of the reordering window of the user equipment, so that the macro base station and the micro base station When a plurality of communication stations simultaneously provide a data offload service for one user equipment, the SN of the data packet received by the control user equipment is within the length of the reordering window of the PDCP layer of the user equipment. Avoid discarding data outside the reordering window and impeding the transmission rate of data transmission and the ability of the system to handle services. Through the cooperation of the configuration windows of the PDCP layer of the macro base station and the micro base station, the forwarding and offload performance of the data packet is improved.

As an optional implementation manner, the receiving unit is further configured to receive configuration information that is used to instruct the micro base station to send a data packet buffer status report to the macro base station.

The configuration unit is further configured to configure, according to the configuration information that is used to instruct the micro base station to send a data packet buffer status report to the macro base station, a parameter that sends a data packet buffer status report to the macro base station;

The sending unit is further configured to send a data packet buffer status report to the macro base station according to the parameter reported by the data packet buffer status.

In this embodiment, the receiving unit sent by the macro base station receives the configuration information sent by the macro base station, and the micro base station configures, by the configuration unit, the parameter that the micro base station sends the data packet buffer status report to the macro base station according to the configuration information, and the data packet buffer status is sent by the sending unit. The reported parameter sends a data packet buffer status report to the macro base station, so that the macro base station obtains the data buffer status of the micro base station, so as to start the scheduling policy adjustment mechanism, and adjust the data of the data packet sent by the macro base station and the micro base station to the user equipment respectively. The amount of data is distributed more quickly and reasonably, which makes the system transmit data more flexible and improves the universal application of the data transmission system.

As an optional implementation manner, the receiving unit is further configured to: according to the determining, determining, by the determining unit, that the data volume of the data packet to be sent by the micro base station reaches a window length of the PDCP layer sending data packet configured by the micro base station, and receiving the RLC of the micro base station The transmission indication sent by the layer.

Or the receiving unit determines, according to the determining unit, that the data volume of the data packet to be sent by the micro base station reaches The PDCP layer configured by the macro base station transmits the window length of the data packet, and receives the transmission indication sent by the PDCP layer of the user equipment.

The sending unit is further configured to send, according to the transmission indication sent by the RLC layer of the micro base station, the data packet to be sent by the micro base station to the user equipment. Alternatively, the sending unit continues to send the data packet to be sent by the micro base station to the user equipment according to the transmission indication sent by the PDCP layer of the user equipment.

A thirteenth embodiment of the present application provides a user equipment, where the user equipment includes a receiving unit, configured to receive a data packet sent by a macro base station within a window length range of a PDCP layer of a macro base station.

And the receiving unit is further configured to receive a data packet that is sent by the micro base station within a window length of a transmit data packet of the PDCP layer of the micro base station.

The receiving unit may be a radio frequency device to implement the above functions.

The user equipment provided in this embodiment receives, by the receiving unit, a data packet sent by the macro base station in a window length range of the PDCP layer of the configured macro base station, and a window length range of the received micro data base in the configured sending data packet. The data packet sent by the user equipment is such that the sum of the window length of the PDCP layer of the macro base station configured by the user equipment according to the configuration information and the window length of the transmission data packet of the micro base station is less than or equal to the reordering window of the user equipment. The length of the re-sorting window of the PDCP layer of the user equipment is controlled by the SN of the data packet received by the user equipment when the plurality of communication stations, such as the macro base station and the micro base station, simultaneously provide the data offloading service for one user equipment. Avoid discarding data outside the reordering window and impeding transmission of data transmission The rate and ability of the system to handle the business. Through the cooperation of the configuration windows of the PDCP layer of the macro base station and the micro base station, the forwarding and offload performance of the data packet is improved.

As an optional implementation manner, the user equipment further includes a sorting unit and a sending unit. The sorting unit is configured to sort the SDUs of the PDCP layer to obtain the sorted SDUs. And a sending unit, configured to send the sorted SDU to a higher layer relative to the PDCP layer.

In this embodiment, the SDU is processed by the sorting unit, so that the user equipment first performs the sorting process of the PDCP layer before sending the SDU to the upper layer, so as to prevent the data received by the receiving end from being out of order due to the out-of-order of the SDU. The system cannot be triggered to process data normally. The sequencing process improves the quality of data transmission and the performance of network communication.

Referring to FIG. 15, FIG. 15 is a structural diagram of a user equipment according to Embodiment 14 of the present application. As shown in FIG. 15, the user equipment provided in this embodiment includes: a receiving unit 150, a configuration unit 151, a determining unit 152, and a sending unit 153.

The receiving unit 150 is configured to receive, by the macro base station, a device that is used to indicate the user equipment.

The length of the window in which the PDCP layer sends the data packet to the macro base station, and includes the user equipment for indicating

The PDCP layer transmits configuration information of the window length of the data packet to the micro base station.

The configuration unit 151 is configured to configure, according to the configuration information, a window length of the PDCP layer of the user equipment to send the data packet to the macro base station, and configure a window length of the PDCP layer of the user equipment to send the data packet to the micro base station.

The determining unit 152 is configured to determine whether the data volume of the data packet to be sent by the user equipment to the macro base station is within a range of a window length of the PDCP layer of the configured user equipment to send the data packet to the macro base station.

The sending unit 153 is configured to determine, according to the determining unit 152, that the data amount of the data packet to be sent by the user equipment to the macro base station is within a range of a window length of the PDCP layer of the configured user equipment to send the data packet to the macro base station, and send the to-be-sent The data packet to the macro base station is given to the macro base station. And the determining unit 152 is further configured to determine whether the data volume of the data packet to be sent by the user equipment to the micro base station is within a range of a window length of the PDCP layer of the configured user equipment to send the data packet to the micro base station.

The sending unit 153 is further configured to: according to the determining, by the determining unit 152, a notification that the data amount of the data packet to be sent by the user equipment to the micro base station is within a range of a window length of the PDCP layer of the configured user equipment to send the data packet to the micro base station, and send The data packet sent to the micro base station is sent to the micro base station.

The length of the window in which the PDCP layer of the user equipment sends the data packet to the macro base station and the user equipment The sum of the window lengths of the PDCP layer transmitting the data packets to the micro base station is less than or equal to the length of the reordering window of the PDCP layer of the macro base station.

The configuration unit may be a processor, and the determining unit may be another processor, and the receiving unit and the sending unit may be radio frequency devices. These processors or device units can be implemented by a logic integrated circuit that performs circuit connections in accordance with the above described logical relationships.

The user equipment provided in this embodiment receives the configuration information sent by the macro base station through the receiving unit 150, and configures the PDCP layer of the user equipment to send the window length of the data packet to the macro base station, and configures the PDCP layer of the user equipment to be micro. The length of the window in which the base station transmits the data packet, so that when the user equipment transmits data to the plurality of communication stations through the sending unit 153, the SN of the transmitted data packet does not exceed the length range of the reordering window of the PDCP layer of each communication station, and each communication is avoided. The site discards data outside the reordering window and impedes the transmission rate of the data transmission and the ability of the system to process the service. Through the cooperation of the reordering windows of the macro base station and the micro base station, the data packet forwarding and offload performance is improved.

As an optional implementation manner, the receiving unit is further configured to: according to the determining, determining, by the determining unit, that the data volume of the data packet to be sent by the user equipment to the macro base station reaches a window length of the PDCP layer sending the data packet of the macro base station, and receiving the user equipment The transmission indication sent by the RLC layer.

The sending unit is further configured to send the data packet to be sent to the macro base station to the macro base station according to the transmission indication. And the receiving unit is further configured to: according to the determining, determining, by the determining unit, that the data volume of the data packet to be sent by the user equipment to the micro base station reaches the window length of the PDCP layer of the micro base station, and receiving the transmission indication sent by the RLC layer of the user equipment.

The sending unit is further configured to send the data packet to be sent to the micro base station to the micro base station according to the transmission indication. Referring to FIG. 16, FIG. 16 is a structural diagram of a user equipment according to Embodiment 15 of the present application. As shown in FIG. 16, the user equipment provided in this embodiment includes: a receiving unit 160, a configuration unit 161, and a sending unit 162.

The receiving unit 160 is configured to receive configuration information sent by the macro base station.

The configuration unit 161 is configured to configure a trigger condition of the status report of the PDCP layer according to the configuration information. The sending unit 162 is configured to send a status report of the PDCP layer to the macro base station according to the trigger condition that the user equipment satisfies the status report of the PDCP layer.

Wherein, the configuration unit may be a processor, and the sending unit and the receiving unit may be shot Frequency devices, these processors or device units can be implemented by logic integrated circuits. In this embodiment, circuit connections can be made in accordance with the above logical relationships to achieve the above functions.

The user equipment provided in this embodiment receives the configuration information sent by the macro base station through the receiving unit 160, and configures the condition for sending the status report of the PDCP layer by using the configuration unit 161, so that the macro base station can obtain the status report of the user equipment that satisfies the PDCP layer. The status report of the PDCP layer sent in the case of the triggering condition, the macro base station can start the scheduling policy adjustment mechanism according to the obtained status report of the PDCP layer, so that the performance of the system transmission data is more flexible, and the universal application of the data transmission system is improved. type.

As an optional implementation manner, the configuration information includes the duration of the timer of the user equipment. The triggering condition of the status report of the PDCP layer is that the user equipment periodically sends the status report of the PDCP layer according to the duration of the timer.

As an optional implementation manner, the configuration information includes a duration of the timer of the user equipment and a preset range of the window. The trigger condition of the status report of the PDCP layer is that the user equipment confirms the sequence number SN of the received data packet in the window. Outside the preset range, and confirm that the timer is started and the timer expires.

In summary, the data transmission method and related device provided by the embodiment of the present application configure the PDCP layer of the macro base station to be sent by the macro base station according to the first configuration information including the window length of the transmission data packet for indicating the PDCP layer of the macro base station. The window length of the data packet, so that the macro base station transmits data to the user equipment within the window length of the PDCP layer of the configured macro base station, and sends a window length including the transmission data packet for indicating the PDCP layer of the micro base station. The second configuration information is sent to the micro base station, so that the micro base station configures the window length of the PDCP layer of the micro base station according to the second configuration information, and the micro base station sends the data to the configured window length of the sent data packet. User equipment. The sum of the window length of the PDCP layer of the macro base station configured in the configuration information and the window length of the transmission data packet of the micro base station is less than or equal to the length of the reordering window of the user equipment, so that the macro base station and the micro base station When the data is shunted in the case of switching states or carrier aggregation between the plurality of communication sites, the SN of the data packet received by the user equipment is controlled within the length of the reordering window of the PDCP layer of the user equipment. Or controlling the user equipment to transmit data to multiple communication sites, the SN of the data packet does not exceed the length range of the reordering window of the PDCP layer of each communication station, avoiding discarding data outside the reordering window range and impeding data transmission. Transmission rate and the ability of the system to handle the business. The phase of the reordering window through the macro base station and the micro base station Mutual cooperation improves the forwarding and offload performance of data packets.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the above modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or modules may be combined. Either can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device, module or unit, or an electrical, mechanical or other form of connection.

The modules or units described above as separate components may or may not be physically separated. The components displayed as modules or units may or may not be physical modules or units, that is, may be located in one place, or may be distributed in many places. On a network module or unit. Some or all of the modules or units may be selected according to actual needs to achieve the objectives of the embodiments of the present application.

In addition, each functional module or unit in each embodiment of the present application may be integrated into one processing module or unit, or each module or unit may exist physically separately, or two or more modules or units may be integrated in In a module or unit. The above integrated modules or units can be implemented in the form of hardware or in the form of software functional units.

The above-described integrated modules or units, if implemented in the form of software functional modules or units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application is essentially or partially contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. Including a number of instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present application. All or part of the steps. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. . The above description is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any equivalent modifications can be easily conceived by those skilled in the art within the technical scope disclosed by the present application. Or, all such modifications or substitutions are intended to be included within the scope of the present application. Therefore, the scope of protection of this application shall be subject to the scope of protection of the claims.

Claims

claims

1. A data transmission method, characterized by including:

The macro base station configures the window length of the PDCP layer of the macro base station to transmit the data packet according to the first configuration information including the first configuration information used to indicate the window length of the packet data transmission packet of the PDCP layer of the macro base station;

If it is determined that the data amount of the data packet to be sent by the macro base station is within the window length range of the PDCP layer of the macro base station for sending data packets, then send the data packet to be sent by the macro base station to the user equipment; and, send Second configuration information indicating a window length for transmitting data packets of the PDCP layer of the micro base station is included to the micro base station, so that the micro base station configures the transmission of the PDCP layer of the micro base station according to the second configuration information. The window length of the data packet, and the micro base station determines that the data amount of the data packet to be sent by the micro base station is within the window length range of the data packet sent by the PDCP layer of the micro base station, then the micro base station sends the data packet to be sent. Send the data packet to the user equipment;

Wherein, the sum of the length of the window of the PDCP layer of the macro base station for transmitting data packets and the length of the window of the PDCP layer of the micro base station for transmitting data packets is less than or equal to the reordering window of the PDCP layer of the user equipment. length.

2. The method of data transmission according to claim 1, wherein the sending includes second configuration information used to indicate the length of the window for transmitting data packets of the PDCP layer of the micro base station before, after, or to the micro base station. At this time, the method also includes:

Sending configuration information including instructing the micro base station to send a data packet buffering status report to the macro base station, so that the micro base station configures parameters for sending the data packet buffering status report to the macro base station; receiving the micro base station The data packet cache status report is sent according to the configuration information instructing the micro base station to send a data packet cache status report to the macro base station.

3. The method of data transmission according to claim 1 or 2, characterized in that, the method further includes: if it is determined that the data volume of the data packet to be sent by the macro base station reaches the PDCP layer of the macro base station, sending data If the window length of the packet is equal to the window length of the packet, after receiving the transmission instruction sent by the radio link control RLC layer of the macro base station, the data packet to be sent by the macro base station is sent to the user equipment.

4. The data transmission method according to claim 3, characterized in that the method further includes: sorting the service data units SDU of the PDCP layer to obtain the sorted SDU;

Send the sorted SDU to the gateway.

5. The method of data transmission according to claim 1, characterized in that the ratio of the window length of the PDCP layer of the macro base station for sending data packets to the length of the window of the PDCP layer of the micro base station for sending data packets is equal to the The service offload ratio between the macro base station and the micro base station.

6. A method of data transmission, characterized in that the method includes:

Send configuration information including a window length used to instruct the PDCP layer of the user equipment to send the data packet to the macro base station, and including a window length used to instruct the PDCP layer of the user equipment to send the data packet to the micro base station to the user. Equipment, so that the user equipment configures the window length of the PDCP layer of the user equipment to send data packets to the macro base station according to the configuration information, and configures the PDCP layer of the user equipment to send data packets to the micro base station. The window length is such that the user equipment sends the data packet to the macro base station within the configured window length of the PDCP layer of the user equipment to send the data packet to the macro base station, and the user equipment sends the data packet to the macro base station within the configured window length. The PDCP layer of the user equipment sends the data packet to the micro base station within the window length of the data packet sent to the micro base station;

Receive data packets sent by the user equipment within the window length of the PDCP layer of the user equipment sending data packets to the macro base station;

Wherein, the sum of the window length for the PDCP layer of the user equipment to send data packets to the macro base station and the window length for the PDCP layer of the user equipment to send data packets to the micro base station is less than or equal to the PDCP of the macro base station. The length of the layer's reordering window.

7. The data transmission method according to claim 6, wherein the method further includes: sorting the service data units SDU of the PDCP layer to obtain the sorted SDU;

Send the sorted SDU to the gateway.

8. The method of data transmission according to claim 7, characterized in that the length of the window in which the PDCP layer of the user equipment sends data packets to the macro base station is the same as the length of the window in which the PDCP layer of the user equipment sends data packets to the micro base station. The length ratio of the window for sending data packets is equal to the traffic offload ratio sent by the user equipment to the macro base station and the micro base station.

9. A data transmission method, characterized by including:

Send configuration information to the user equipment so that the user equipment configures the triggering conditions for the status report of the PDCP layer;

Obtain the status report of the PDCP layer sent by the user equipment when the triggering condition of the status report of the PDCP layer is met.

10. The method of data transmission according to claim 9, characterized in that, the configuration information includes the duration of the timer of the user equipment; the triggering condition of the status report of the PDCP layer is that the user equipment follows the timer Periodically send status reports of the PDCP layer.

11. A data transmission method, characterized by including:

The micro base station receives the configuration information sent by the macro base station including the window length for indicating the window length of the PDCP layer of the micro base station;

Configure the window length of the PDCP layer of the micro base station to send data packets according to the configuration information; if it is determined that the data amount of the data packet to be sent by the micro base station is within the configured window length of the PDCP layer of the micro base station to send data packets Within the range, the data packet to be sent by the micro base station is sent to the user equipment; wherein, the window length of the PDCP layer of the macro base station for sending data packets is the same as the window length of the PDCP layer of the micro base station for sending data packets. and is less than or equal to the length of the reordering window of the PDCP layer of the user equipment.

12. The method of data transmission according to claim 11, characterized in that, before the micro base station receives the configuration information sent by the macro base station including the window length for indicating the window length of the PDCP layer of the micro base station for transmitting data packets, When or after, the method further includes:

The micro base station receives configuration information that includes instructing the micro base station to send the data packet cache status report to the macro base station;

Configure parameters for sending the data packet buffering status report to the macro base station according to the configuration information including the configuration information used to instruct the micro base station to send the data packet buffering status report to the macro base station;

The data packet buffering status report is sent to the macro base station according to the parameters of the data packet buffering status report.

13. The data transmission method according to claim 11 or 12, characterized in that the method further includes:

If it is determined that the data amount of the data packet to be sent by the micro base station reaches the window length of the PDCP layer sending data packets configured by the micro base station, after receiving the transmission instruction sent by the RLC layer of the micro base station, send the micro base station The base station sends the data packet to the user equipment.

14. The method of data transmission according to claim 11, characterized in that the length of the window of the PDCP layer of the macro base station for transmitting data packets is proportional to the length of the window of the PDCP layer of the micro base station for transmitting data packets. Equal to the traffic offload ratio between the macro base station and the micro base station.

15. A data transmission method, characterized by including:

Receive data packets sent by the macro base station within the window length range of the PDCP layer of the macro base station for sending data packets; and,

Receive data packets sent by the micro base station within the window length range of the configured PDCP layer of the micro base station to send data packets;

Wherein, the sum of the length of the window of the PDCP layer of the macro base station for sending data packets and the length of the window of the PDCP layer of the micro base station for sending data packets is less than or equal to the length of the reordering window of the PDCP layer of the user equipment.

16. The data transmission method according to claim 15, characterized in that the method further includes: sorting the SDUs of the PDCP layer to obtain the sorted SDUs;

17. A method of data transmission, characterized in that the method includes:

Receive the window length sent by the macro base station including the window length used to instruct the PDCP layer of the user equipment to send the data packet to the macro base station, and include the window used to instruct the PDCP layer of the user equipment to send the data packet to the micro base station. Length configuration information;

Configure the window length for the PDCP layer of the user equipment to send data packets to the macro base station according to the configuration information, and configure the window length for the PDCP layer of the user equipment to send data packets to the micro base station;

After it is determined that the data amount of the data packet to be sent by the user equipment to the macro base station is within the configured window length of the PDCP layer of the user equipment to send the data packet to the macro base station, then the data volume to be sent to the macro base station is sent. The data packet of the macro base station is given to the macro base station; and,

After it is determined that the data amount of the data packet to be sent by the user equipment to the micro base station is within the configured window length of the PDCP layer of the user equipment to send the data packet to the micro base station, then the data volume to be sent to the micro base station is sent. The data packet of the micro base station is given to the micro base station;

18. The method of data transmission according to claim 17, further comprising: if it is determined that the data volume of the data packet to be sent by the user equipment to the macro base station reaches the macro base station. The window length of the PDCP layer of the base station for sending data packets, then after receiving the transmission instruction sent by the RLC layer of the user equipment, sends the data packet to be sent to the macro base station to the macro base station;

And, if it is determined that the data amount of the data packet to be sent by the user equipment to the micro base station reaches the window length of the PDCP layer of the micro base station for sending the data packet, then upon receiving the transmission sent by the RLC layer of the user equipment After the instruction, the data packet to be sent to the micro base station is sent to the micro base station.

19. A data transmission method, characterized by including:

Receive configuration information sent by the macro base station;

Configure the triggering conditions for the status report of the PDCP layer according to the configuration information;

The status report of the PDCP layer is sent to the macro base station when the triggering condition of the status report of the PDCP layer is met.

20. The method of data transmission according to claim 19, characterized in that, the configuration information includes the duration of the timer of the user equipment; the triggering condition of the status report of the PDCP layer is that the user equipment follows the timer Periodically send status reports of the PDCP layer.

21. The method of data transmission according to claim 19, wherein the configuration information includes the duration of the timer of the user equipment and the preset range of the window; the triggering condition of the status report of the PDCP layer is the The user equipment confirms that the sequence number SN of the received data packet is outside the preset range of the window, and confirms that the timer is started and the timer times out.

22. A base station, characterized by: including:

A configuration unit configured to configure the window length of the PDCP layer of the macro base station to transmit the data packet according to the first configuration information including the first configuration information used to indicate the window length of the PDCP layer of the macro base station to transmit the data packet;

A judgment unit configured to judge whether the data amount of the data packet to be sent by the macro base station is within the configured window length range of the PDCP layer of the macro base station for sending data packets;

A sending unit configured to determine, based on the judging unit, a notification that the data volume of the data packet to be sent by the macro base station is within the configured window length range of the data packet sent by the PDCP layer of the macro base station, and send the notification to the macro base station. The data packet to be sent to the user device;

The sending unit is also configured to send second configuration information including a window length indicating a window length for transmitting data packets of the PDCP layer of the micro base station to the micro base station, so that the micro base station configures the micro base station according to the second configuration information. The window length of the PDCP layer of the micro base station for sending data packets, and the micro base station determines that the data amount of the data packet to be sent by the micro base station is within the configured window length range for sending data packets, then the micro base station sends the The data packet to be sent by the micro base station is sent to the user equipment;

23. The base station according to claim 22, further comprising a receiving unit;

Wherein, the sending unit is further configured to send configuration information including instructing the micro base station to send the data packet cache status report to the macro base station, so that the micro base station is configured to send the data packet cache status report to the macro base station. After describing the parameters of the data packet cache status report, send the data packet cache status report to the macro base station;

The receiving unit is configured to receive the data packet cache status report sent by the micro base station according to the configuration information instructing the micro base station to send a data packet cache status report to the macro base station.

24. The base station according to claim 22 or 23, wherein the receiving unit is further configured to determine according to the judging unit that the data volume of the data packet to be sent by the macro base station reaches the configured value of the macro base station. The PDCP layer sends a notification of the window length of the data packet, and receives a transmission instruction sent by the radio link control RLC layer of the macro base station;

The sending unit is further configured to send the data packet to be sent by the macro base station to the user equipment according to the transmission instruction sent by the wireless link control RLC layer of the macro base station received by the receiving unit.

25. The base station according to claim 24, characterized in that the base station further includes a sorting unit; the sorting unit is used to sort the service data unit SDU of the PDCP layer to obtain the sorted SDU;

The sending unit is also used to send the sorted SDU to the gateway.

26. The base station according to claim 22, wherein the length ratio of the window of the PDCP layer of the macro base station for transmitting data packets to the length of the window of the PDCP layer of the micro base station for transmitting data packets is equal to the length of the macro base station. The traffic offload ratio to the micro base station.

27. A base station, characterized by including:

A sending unit, configured to send a window length including a window length used to instruct the PDCP layer of the user equipment to send a data packet to the macro base station, and a window length used to instruct the PDCP layer of the user equipment to send a data packet to the micro base station. The configuration information of the window length is given to the user equipment, so that the user equipment can The configuration information configures the window length for the PDCP layer of the user equipment to send data packets to the macro base station, and configures the window length for the PDCP layer of the user equipment to send data packets to the micro base station, so that the user equipment Send the data packet to the macro base station within the window length of the configured PDCP layer of the user equipment to send the data packet to the macro base station, and the user equipment sends the data packet to the macro base station in the configured PDCP layer of the user equipment. The micro base station sends the data packet to the micro base station within the range of the window length for sending the data packet;

A receiving unit configured to receive data packets sent by the user equipment within the window length of the PDCP layer of the user equipment sending data packets to the macro base station;

28. The base station according to claim 27, characterized in that, the base station further includes:

The sorting unit is used to sort the SDUs at the PDCP layer to obtain the sorted SDUs;

The sending unit is also used to send the sorted SDU to the gateway.

29. The base station according to claim 27, wherein the length of the window in which the PDCP layer of the user equipment sends data packets to the macro base station is equal to the length of the window in which the PDCP layer of the user equipment sends data packets to the micro base station. The length ratio of the window is equal to the service offload ratio sent by the user equipment to the macro base station and the micro base station.

30. A base station, characterized by including:

A sending unit, configured to send configuration information to the user equipment, so that the user equipment configures the triggering conditions of the status report of the PDCP layer;

A receiving unit, configured to obtain the status report of the PDCP layer sent by the user equipment when the triggering condition of the status report of the PDCP layer is satisfied.

31. The base station according to claim 30, wherein the configuration information includes a timer period, and the triggering condition of the PDCP layer status report is that the user equipment follows the timer period. The status report of the PDCP layer is permanently sent.

32. A micro base station, characterized by including:

A receiving unit configured to receive configuration information sent by the macro base station including the window length indicating the window length of the PDCP layer of the micro base station for sending data packets; A configuration unit configured to configure the window length of the PDCP layer of the micro base station for sending data packets according to the configuration information;

A judgment unit configured to judge whether the data amount of the data packet to be sent by the micro base station is within the window length range of the PDCP layer of the micro base station for sending data packets;

A sending unit configured to determine, based on the judgment unit, a notification that the data volume of the data packet to be sent by the micro base station is within the configured window length range of the data packet transmission window of the PDCP layer of the micro base station, and send the micro base station The data packet to be sent to the user device;

Wherein, the sum of the window length of the PDCP layer of the macro base station for transmitting data packets and the window length of the PDCP layer of the micro base station for transmitting data packets is less than or equal to the length of the reordering window of the PDCP layer of the user equipment.

33. The micro base station according to claim 32, characterized in that,

The receiving unit is also configured to receive configuration information including instructing the micro base station to send the data packet cache status report to the macro base station;

The configuration unit is further configured to configure the method of sending the data packet buffering status report to the macro base station according to the configuration information including the configuration information used to instruct the micro base station to send the data packet buffering status report to the macro base station. parameters;

The sending unit is further configured to send the data packet buffering status report to the macro base station according to the parameters of the data packet buffering status report.

34. The micro base station according to claim 32 or 33, wherein the receiving unit is further configured to determine according to the judgment unit that the data volume of the data packet to be sent by the micro base station reaches the configuration of the micro base station. The PDCP layer sends a notification of the window length of the data packet, and receives the transmission instruction sent by the RLC layer of the micro base station;

The sending unit is also configured to send the data packet to be sent by the micro base station to the user equipment according to the transmission instruction.

35. The micro base station according to claim 32, wherein the ratio of the length of the window for transmitting data packets of the PDCP layer of the macro base station to the length of the window of the PDCP layer of the micro base station for transmitting data packets is equal to The traffic offload ratio between the macro base station and the micro base station.

36. A user equipment, characterized by: including:

A receiving unit, configured to receive the window length of the data packet sent by the PDCP layer of the macro base station. packets sent within the range; and,

The receiving unit is also configured to receive data packets sent by the micro base station within the window length range of the PDCP layer of the micro base station for sending data packets;

37. The user equipment according to claim 36, further comprising:

38. A user equipment, characterized by: including:

A receiving unit, configured to receive a window length sent by a macro base station including a window length for instructing the PDCP layer of the user equipment to send a data packet to the macro base station, and a window length for instructing the PDCP layer of the user equipment to send a data packet to the micro base station. Configuration information of the window length for sending data packets;

A configuration unit configured to configure the window length for the PDCP layer of the user equipment to send data packets to the macro base station according to the configuration information, and configure the window length for the PDCP layer of the user equipment to send data packets to the micro base station. ;

A judgment unit configured to judge whether the data amount of the data packet to be sent by the user equipment to the macro base station is within the configured window length of the PDCP layer of the user equipment for sending data packets to the macro base station;

A sending unit, configured to determine the data amount of the data packet to be sent by the user equipment to the macro base station according to the judgment unit and the window length of the configured PDCP layer of the user equipment to send the data packet to the macro base station. Notification within the scope, sending the data packet to be sent to the macro base station to the macro base station; and,

The determination unit is also configured to determine whether the data volume of the data packet to be sent by the user equipment to the micro base station is within the configured window length range of the PDCP layer of the user equipment for sending data packets to the micro base station. Inside;

The sending unit is also configured to determine the data volume of the data packet to be sent by the user equipment to the micro base station according to the judgment unit, and when the configured PDCP layer of the user equipment sends the data packet to the micro base station. Notification within the range of the window length, sending the data packet to be sent to the micro base station to the micro base station;

39. The user equipment according to claim 38, wherein the receiving unit is further configured to determine, according to the judging unit, that the data volume of the data packet to be sent by the user equipment to the macro base station reaches the The PDCP layer of the macro base station sends a notification of the window length of the data packet, and receives the transmission instruction sent by the RLC layer of the user equipment;

The sending unit is also configured to send the data packet to be sent to the macro base station to the macro base station according to the transmission instruction; and,

The receiving unit is also configured to determine, based on the judging unit, a notification that the data amount of the data packet to be sent by the user equipment to the micro base station reaches the window length of the PDCP layer of the micro base station for sending data packets, and receive the notification. The transmission indication sent by the RLC layer of the user equipment;

The sending unit is further configured to send the data packet to be sent to the micro base station to the micro base station according to the transmission instruction.

40. A user equipment, characterized by: including:

The receiving unit is used to receive the configuration information sent by the macro base station;

A configuration unit, configured to configure the triggering conditions of the status report of the PDCP layer according to the configuration information;

The sending unit is configured to send the status report of the PDCP layer to the macro base station according to the condition that the user equipment satisfies the triggering condition of the status report of the PDCP layer.

41. The user equipment according to claim 40, wherein the configuration information includes the duration of the timer of the user equipment; the triggering condition of the status report of the PDCP layer is that the user equipment follows the duration of the timer. The status report of the PDCP layer is permanently sent.

42. The user equipment according to claim 40, wherein the configuration information includes the duration of the timer of the user equipment and the preset range of the window; the trigger condition of the status report of the PDCP layer is that the user equipment Confirming that the sequence number SN of the received data packet is outside the preset range of the window, and confirming that the timer is started and the timer expires.