WO2015039315A1

WO2015039315A1 - Small station communication method, device and system

Info

Publication number: WO2015039315A1
Application number: PCT/CN2013/083807
Authority: WO
Inventors: 胡振兴; 张戬; 权威
Original assignee: 华为技术有限公司
Priority date: 2013-09-18
Filing date: 2013-09-18
Publication date: 2015-03-26
Also published as: CN104782172B; CN104782172A

Abstract

Provided are a small station communication method, device and system, applied to a heterogeneous network. The heterogeneous network comprises a micro station, and the micro station covers at least one small station. A user equipment (UE) accesses a micro station and performs data transmission with the micro station; the UE receives pre-configuration information about a candidate small station of the UE sent by the micro station, the candidate small station is selected by the micro station from at least one small station within the covered area, and the pre-configuration information comprises small station recognition information and small station connection information; and the UE determines a small station to be accessed and establishes a connection according to the pre-configuration information. The technical solution provided in the embodiments of the present invention enables a UE moving at a high speed to quickly access a small station and obtain an extra communication service from the small station, thereby saving the energy consumption of the UE, is easy to realize and will not significantly increase device costs.

Description

Station communication method, device and system

Technical field

Embodiments of the present invention relate to the field of wireless communications, and in particular, to a small station communication method, device, and system. Background technique

With the development of communication and information technology, users have a stronger demand for the capacity, quality and depth coverage of data transmission services. In order to provide better performance for user equipment (UE) and traffic load of the shunt macro network, the 4th generation communication system uses the homogeneous network used in the original 2nd/2.5th and 3rd generation communication systems. On the basis of this, a heterogeneous network (HetNet) networking scenario is proposed. In this scenario, the macro station is responsible for wide coverage. The covered area is called macro cell to meet mobility and no. The need for seam coverage; the small station is used to supplement the coverage of the macro station. It can be flexibly deployed in hotspots, blind spots, cell edges and even indoor areas according to the requirements of traffic distribution and seamless coverage, providing deep coverage and capacity expansion of the network. The smaller hotspot area covered by the small station is called a micro cell or a small cell.

In the prior art, to add a small cell service to a UE, it is necessary to use a UE to discover a small station and perform a process of triggering, configuring, activating, measuring, reporting, etc. to access the small station, which takes a long time. Since the coverage area of the small station is small (for example, the radius is 50 meters), if the UE is in the high-speed mobile state, the UE stays in the small station for a short time, and waits until the UE accesses the small station, and hopes to acquire the small station to provide the service, the UE It may have begun to leave the coverage of the station, which results in the high-speed mobile UE not being able to take advantage of the service of the station. Summary of the invention

The embodiments of the present invention provide a small station communication method, device, and system applied in a heterogeneous network scenario, so that a high-speed mobile UE can obtain additional communication services from a small station. In a first aspect, the present invention provides a small station communication method, where the method is applied to a heterogeneous network, where the heterogeneous network includes a macro station, and the macro station covers at least one small station, and the method includes:

The user equipment UE accesses the macro station and performs data transmission with the macro station.

Receiving, by the UE, the pre-configuration information of the candidate small station of the UE that is sent by the macro station, where the candidate small station of the UE is selected by the macro station from the at least one small station, the pre-configuration information It includes small station identification information and small station connection information.

Determining, by the UE, the small station to be accessed in the candidate small station according to the small station identification information. The UE establishes a connection with the small station to be accessed according to the small station connection information.

In a first possible implementation manner of the first aspect, the pre-configuration information further includes a connection validity time of the candidate small station; the method further includes: when the UE is connected to the accessed small station The time exceeds the connection validity time, and the UE releases the pre-configuration information of the accessed small station.

In a second possible implementation manner of the first aspect, the method further includes: sending, by the UE, a MAC layer control MAC CE message carrying a release indication to the macro station; Pre-configured information for the station.

In a third possible implementation manner of the first aspect, the small station identification information includes small station coverage information.

In a third possible implementation manner of the first aspect, the small station coverage information includes small station address location information and/or small station service area identification information.

With reference to the first aspect, the first possible implementation manner of the first aspect, the second possible implementation manner, or the third possible implementation manner, the fourth possible implementation manner of the foregoing aspect, the UE periodically reporting Mobile information is sent to the macro station, and the mobile information is used to determine an alternate niche of the UE. In a second aspect, the present invention provides a small station communication method, where the method is applied to a heterogeneous network, where the heterogeneous network includes a macro station, and the macro station covers at least one small station, and the method includes:

The macro station establishes a connection with a user equipment UE that enters the coverage area of the macro station, and performs data transmission with the UE. The macro station determines an alternate station of the UE from the at least one small station.

The macro station transmits pre-configuration information of the candidate small station of the UE to the UE, and the pre-configuration information includes small station identification information and small station connection information.

The small station identification information is used by the UE to determine a small station to be accessed in the candidate small station, and the small station connection information is used for establishing a connection between the UE and the small station to be accessed.

In a first possible implementation manner of the second aspect, the method further includes: after the UE establishes a connection with the small station to be accessed, the macro station schedules the UE and the access small Data transfer between stations.

With reference to the first possible implementation manner of the second aspect, the second possible implementation manner of the second aspect, the macro station determines that the UE has left the accessed small station, and terminates scheduling the UE and the Transmitting data transmission between the accessed small stations, and sending a message to the accessed small station, instructing the accessed small station to release the context of the UE.

In a second possible implementation manner of the second aspect, the determining, by the macro station, that the UE has left the accessing station includes: receiving, by the macro station, a MAC CE message that is sent by the UE and carrying a release indication, according to the The MAC CE message determines that the UE has left the visited station.

In a second possible implementation manner of the second aspect, the determining, by the macro station, that the UE has left the accessed small station includes: when the macro station continuously schedules the UE and the accessed small station The data transmission between the two fails, and it is determined that the UE has left the accessed station.

In a third possible implementation manner of the second aspect, the pre-configuration information further includes a connection validity time of the candidate small station of the UE, where the method further includes: when the UE is connected to the The connection time of the small station exceeds the connection validity time, the macro station terminates scheduling data transmission between the UE and the accessed small station, and sends a message to the accessed small station, indicating the The accessed small station releases the context of the UE. In a third aspect, the present invention provides a macro station, which is used in a heterogeneous network, where the macro station includes the macro station, and the macro station covers at least one small station, and the macro station includes: The connection transmission module is configured to establish a connection with a user equipment UE that enters the coverage area of the macro station, and perform data transmission with the UE.

Small station selection module: an alternative station for determining the UE from the at least one small station.

The sending module is configured to send the pre-configuration information of the candidate small station to the UE, where the pre-configuration information includes the small station identification information and the small station connection information.

In a first possible implementation manner of the third aspect, the macro station further includes: a data scheduling module, configured to: after the UE establishes a connection with the small station to be accessed, scheduling the UE and accessing Data transfer between small stations.

With reference to the first possible implementation manner of the third aspect, the second possible implementation manner of the third aspect, the data scheduling module is further configured to: determine that the UE has left the accessed small station, and terminate the scheduling office Transmitting a data transmission between the UE and the accessed small station, and sending a message to the accessed small station, indicating that the access of the station releases the context of the UE.

In a second possible implementation manner of the third aspect, the data scheduling module further includes:

The CE message receiving unit is configured to receive a MAC CE message that is sent by the UE and that carries the release indication. The data scheduling module is further configured to: according to the received MAC CE message, determine that the UE has left the accessed small station.

In a second possible implementation manner of the third aspect, the data scheduling module is further configured to: continuously schedule the data transmission failure of the UE and the accessed small station, and determine that the UE has left the access Small station.

In a third possible implementation manner of the third aspect, the pre-configuration information further includes a connection validity time of the candidate small station of the UE, where the macro station further includes: a connection time measurement module, configured to measure the UE connection The time taken to enter the station; the data scheduling module is further configured to: when the connection time between the UE and the accessed station exceeds the connection validity time, terminate scheduling the UE and the access Data transmission between the small stations, and sending a message to the accessed small station, indicating that the accessed small station releases the station The context of the UE.

With reference to the third aspect, the first possible implementation manner of the third aspect, the second possible implementation manner, or the third possible implementation manner, the fourth possible implementation manner of the third aspect, the small station selection The module further includes: a mobile information receiving unit, configured to receive mobile information reported by the UE periodically, where the mobile information is used to determine an alternate small station of the UE. In a fourth aspect, the present invention provides a user equipment UE, which is used in a heterogeneous network, where the heterogeneous network includes a macro station, and the macro station covers at least one small station, and the UE includes:

The connection transmission module is configured to access the macro station and perform data transmission with the macro station.

a receiving module: configured to receive pre-configuration information of the candidate small station of the UE sent by the macro station, where the candidate small station of the UE is selected by the macro station, and the pre-configuration information includes Station identification information and station connection information.

The station determining module is configured to determine, in the candidate station, the station to be accessed according to the station identification information.

The small station access module is configured to establish a connection with the small station to be accessed according to the small station connection information.

In a first possible implementation manner of the fourth aspect, the UE further includes: a release module, configured to release pre-configuration information of the small station accessed by the UE.

With reference to the first possible implementation manner of the fourth aspect, the second possible implementation manner of the fourth aspect, the small station access module includes: a MAC CE sending unit, configured to send a MAC CE message carrying a release indication to And the releasing module is further configured to: after the sending of the MAC CE message, release pre-configuration information of the small station accessed by the UE.

With reference to the first possible implementation manner of the fourth aspect, the third possible implementation manner of the fourth aspect, the pre-configuration information further includes a connection validity time of the candidate small station of the UE, where the UE further includes: a measuring module, configured to measure a time used by the UE to access the small station; the releasing module is further configured to: when the connection time between the UE and the accessed small station exceeds the effective time of the connection, release the Pre-configuration information of the accessed small station.

With reference to the fourth aspect, the first possible implementation manner of the fourth aspect, the second possible implementation manner, or the third possible implementation manner, the fourth possible implementation manner of the fourth aspect, the UE further includes: And a mobile information reporting module, configured to report, to the macro station, mobile information, where the mobile information is used to determine an alternate small station of the UE. In a fifth aspect, the present invention provides a macro station, which is applied to a heterogeneous network, where the macro station includes the macro station, and the macro station covers at least one small station, and the macro station includes:

a processor: configured to establish a connection with a user equipment UE that enters a coverage area of the macro station, and perform data transmission with the UE; and select, among the at least one small station, a small station that the user equipment UE may pass.

Transmitter: configured to send pre-configuration information of the candidate small station of the UE to the UE, where the pre-configuration information includes small station identification information and small station connection information.

In a first possible implementation manner of the fifth aspect, the processor is further configured to

After establishing a connection with the small station to be accessed, the UE schedules data transmission between the UE and the accessed small station.

With reference to the first possible implementation manner of the fifth aspect, the second possible implementation manner of the fifth aspect, the processor is further configured to: determine that the UE has left the accessed small station, and terminate scheduling the UE Data transmission with the accessed small station, and sending a message to the accessed small station, instructing the accessed small station to release the context of the UE.

In a second possible implementation manner of the fifth aspect, the macro station further includes: a receiver, configured to receive a MAC CE message that is sent by the UE and carries a release indication; and the processor is further configured to receive, according to the The MAC CE message determines that the UE has left the visited station.

In a second possible implementation manner of the fifth aspect, the processor is further configured to: continuously schedule the data transmission failure of the UE and the accessed small station, and determine that the UE has left the accessed small station. In a third possible implementation manner of the fifth aspect, the pre-configuration information further includes a connection validity time of the candidate small station of the UE. The macro station further includes: a timer, configured to measure, after the UE accesses the small station, The processor is further configured to: if the time taken by the UE to access the small station exceeds the connection validity time, terminate scheduling data transmission between the UE and the accessed small station, And sending a message to the accessed small station, instructing the accessed small station to release the context of the UE.

With reference to the fifth aspect, the first possible implementation manner of the fifth aspect, the second possible implementation manner, or the third possible implementation manner, the fourth possible implementation manner of the fifth aspect, the receiver Further, the method is configured to receive mobile information that is periodically reported by the UE, where the mobile information is used to determine an alternate small station of the UE. In a sixth aspect, the embodiment of the present invention provides a user equipment UE, which is applied to a heterogeneous network, where the heterogeneous network includes a macro station, and the macro station covers at least one small station, and the UE includes:

Receiver: configured to receive pre-configuration information of a small station that the UE sends by the macro station, where the candidate small station is selected by the macro station from the at least one small station, where the pre-configuration information is included Station identification information and station connection information.

a processor: configured to access the macro station, perform data transmission with the macro station; and determine, according to the small station identification information, a small station to be accessed in the candidate small station, according to the small station connection information Establishing a connection with the small station to be accessed.

In a first possible implementation manner of the sixth aspect, the pre-configuration information further includes a connection validity time of the small station that the UE may pass; the UE further includes: a timer, configured to measure the UE access station The processor is further configured to: when the connection time between the UE and the accessed small station exceeds the connection validity time, release the pre-configuration information of the accessed small station.

In a second possible implementation manner of the sixth aspect, the UE further includes: a transmitter, configured to send a MAC CE message carrying a release indication to the macro station; and the processor is further configured to: when the MAC After the CE message is sent, the pre-configuration information of the accessed station is released.

In conjunction with the second possible implementation of the sixth aspect, the third possible implementation of the sixth aspect The transmitter is further configured to report the mobile information to the macro station period, where the mobile information is used to determine an alternate small station of the UE. According to a seventh aspect, an embodiment of the present invention provides a network system, where the heterogeneous network includes a macro station, the macro station covers at least one small station, and the network system includes, according to claim 13-19 or claim 25. - macro station as described in claim 31; user equipment UE as claimed in claims 20-24 or 32-35. With the method, device and system disclosed in the embodiments of the present invention, the macro station first determines a small station in the coverage area of the macro station that the UE may pass, as an alternative station of the UE, and then pre-configures the candidate station. The information is sent to the UE, and the UE determines the small station to be accessed and establishes a connection by using the received pre-configuration information. The problem that the UE itself discovers the small station and reports the macro station takes a long time to ensure that the UE maintains the communication with the macro station, and can additionally obtain the data transmission service provided by the small station, thereby improving data throughput and optimizing UE performance. . The technical method provided by the invention does not need to adopt the process that the UE discovers the small station and reports the macro station, and the macro station and the small station obtain communication and then return to the UE, but the macro station pre-configures the small station to the UE, and narrows the target of the small station. The scope reduces the information interaction between the macro station and the small station, saves the time required for the small station to establish a connection with the UE, increases the time that the small station can provide the data transmission service for the UE, and saves the energy consumption of the UE. Single, it will not significantly increase the cost of equipment, and at the same time, it can achieve the purpose of ensuring the throughput of the UE.

The above summary of the invention will be apparent from the following description of the embodiments. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings may be obtained based on these drawings without any creative work.

FIG. 1 is a schematic diagram of a heterogeneous network networking;

2 is a flowchart of a small station communication method according to an embodiment of the present invention;

FIG. 3 is a flowchart of a small station communication method according to an embodiment of the present invention; FIG. 4 is a flowchart of a small station communication method according to another embodiment of the present invention; FIG.

FIG. 5 is a flowchart of a small station communication method according to still another embodiment of the present invention;

FIG. 6 is a flowchart of a small station communication method according to another embodiment of the present invention;

FIG. 7 is a schematic diagram of a macro station according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a user equipment UE according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of a macro station according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of a user equipment UE according to an embodiment of the present invention. detailed description

In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

1 is an embodiment of a heterogeneous network (HetNet) networking scenario, in this embodiment, including a macro base-station and at least one small station within the coverage of the macro station (micro Base-station ) , such as small station 1 - small station 5. After the high-speed mobile user equipment (UE) enters the macro station coverage area, first establish a connection with the macro station and perform data transmission, and the UE passes through some small stations in the macro station area according to its motion trajectory, as shown in FIG. Will pass through station 1, station 2, and station 3. In order to enable the UE to quickly obtain the additional service provided by the small station, the macro station determines the small station 1 to the small station 3 that the UE may pass in advance according to the mobile situation of the UE, and sends the pre-configuration information of the small station 1 to the small station 3 to the UE. It is convenient for the UE to select a small station in the small station that can provide an optimal service for establishing a connection and perform data transmission. In FIG. 1, the UE will first pass the coverage area of the small station 1, and the UE first accesses the small station 1 .

It should be noted that FIG. 1 is only a schematic diagram of a heterogeneous network. In the actual situation, the distribution, the specific location, and the number of the small and medium stations in the coverage area of the macro station need to be determined according to actual network networking requirements. A small station communication method is applied to the heterogeneous network shown in Figure 1. Referring to Figure 2, the method flow includes:

101: The user equipment UE enters the macro station coverage area, establishes a connection with the macro station, and performs data transmission. 102: The UE receives pre-configuration information of the candidate small station of the UE that is sent by the macro station, where the pre-configuration information includes small station identification information and small station connection information.

The alternative station is selected by the macro station in the at least one station. Specifically, according to the motion trajectory of the UE, the UE may pass the coverage of at least one small station in the coverage area of the macro station, and the small station is a small station that the UE may pass, that is, an alternate access station of the UE.

The small station identification information refers to the information used to identify 'j, the station, in the process of determining the access, the UE can determine whether the small station is pre-configured by the small station identification information. . Specifically, the small station identification information includes small station coverage information, such as small station address location information or/and small station service area identification information. Optionally, the small station coverage information further includes a small station coverage radius or/and Small station transmission power, etc. Further, the small station identification information may further include a cell identity (cell ID) and a small station working frequency band, which are used to assist in realizing cell positioning.

The small station connection information is used to establish a connection with the small station. Further, the small station connection information may also be used for a data transmission process after the small station establishes a connection with the UE, and the UE and the small station may be implemented. Fast connection and synchronous communication. The small station connection information may include: a dedicated physical random access channel (PRACH) resource of the small station, where the UE sends a random access request to the small station. Or the small station connection information may further include a radio bearer (RB) of the small station, a physical layer configuration, and a media access control (MAC) layer configuration, configured for establishing the UE and the small station. The data transfer process after the connection. Optionally, since the RB configuration, the physical layer configuration, and the MAC layer configuration of the small station are used for data transmission between the UE and the small station, after the UE accesses the small station, the small station may be according to the requirement of the UE or Proactively send the above configuration information.

The information required for the UE to access the small station is sent by the macro station to the UE in a pre-configured manner, which reduces the information interaction between the UE and the small station, improves data transmission efficiency, and saves energy consumption of the UE.

103: After receiving the pre-configuration information, the UE determines, according to the small station identification information, a small station to be accessed in the candidate small station.

104: The UE establishes a connection with the determined small station to be accessed according to the small station connection information. Further, after accessing the small station, the UE may acquire the communication service through the accessed small station.

The embodiment of the present invention further provides a small station communication method. Referring to FIG. 3, the method flow includes: 201: A macro station establishes a connection with a user equipment UE that enters a coverage area of the macro station, and performs data transmission. 202: The macro station selects an alternate station that determines the UE from the small stations in the coverage area.

203: The macro station sends pre-configuration information of the candidate small station of the UE to the UE, where the pre-configuration information includes the small station identification information and the small station connection information.

The small station identification information is used by the UE to determine a small station to be accessed in the candidate small station, and the small station connection information is used to establish a connection between the UE and the small station to be accessed.

The above two embodiments of the present invention pre-configure the small station that the UE in the macro station coverage area may be pre-configured to the UE by the macro station determining the small station that the UE may pass, and transmitting the pre-configuration information of the small station to the UE. The UE does not need to discover the small station and report the macro station, which reduces the time required for the UE to establish a connection with the small station, and can also increase the time for the small station to provide the service for the UE. Even if the UE is in a high-speed motion, the method provided by the embodiment of the present invention can still effectively access the small station and obtain the communication service provided by the small station. Moreover, according to the method provided by the embodiment of the present invention, the data throughput of the UE is improved, and the energy consumption of the UE is saved. Optionally, the embodiment of the present invention further provides a small station communication method. Referring to FIG. 4, the method flow is as follows:

301: The macro station establishes a connection with the user equipment UE that enters the coverage area of the macro station and performs data transmission.

3021-3024: The macro station selects a small station that the UE may pass as the candidate small station of the UE, and sends the preset configuration information of the candidate small station to the UE, where the macro station is located in the at least one small station. The pre-configuration information includes small station identification information and small station connection information.

Specifically, the macro station determines that the small station that the UE may pass may have three modes: 3021 -3023:

3021: The UE reports the mobile information to the macro station, and the macro station determines the small station that the UE may pass.

The UE may periodically report the mobile information, and may also report the mobile information based on the event trigger. UE The moving information to the macro station may be moving direction information or moving track information. After receiving the moving direction information or moving track information reported by the UE, the macro station may estimate the moving direction information or the moving track information according to the moving direction information or the moving track information. The location change of the UE is described, and according to the geographical location information of the small station within the coverage of the macro station, the small station that the UE may pass is determined, and the candidate small station is determined. Further, the mobile information reported by the UE may further include the mobile speed information, and the macro station may further determine, according to the moving speed information, the time when the UE arrives at the candidate small station, and may determine, according to the time, when the candidate small station is to be Pre-configuration information is sent to the UE. or;

3022: The macro station determines a small station that the UE may pass based on the navigation information reported by the UE after establishing a connection with the macro station.

Specifically, if the UE has a built-in global positioning system (GPS) function, the UE may also report the navigation information of the UE to the macro station, where the navigation information may be the current location and destination of the UE. After the UE accesses the macro station, the UE may send the navigation information of the UE to the macro station. After receiving the navigation information of the UE reported by the UE, the macro station may estimate the moving path of the UE according to the location information and the destination information of the UE. And determine the small station that the UE may pass on the way. Or

3023: The macro station locates the location and speed of the UE based on the positioning algorithm, and determines a small station that the UE may pass.

In step 3023, the UE does not need to report the mobile information or the navigation information to the macro station, but the macro station actively locates the UE, learns the mobile path of the UE from the location and speed of the UE, and determines the small station that the UE may have performed.

The method for determining an alternate small station of the UE by using any one of 3021-3023 may reduce information interaction between the UE and the small station, between the macro station and the small station during the process of determining the small station ready for access by the UE, Shortened

The time prepared by the UE before connecting to the small station, while saving the energy consumption of the UE.

3024: The macro station sends the pre-configuration information of the candidate small station of the UE to the UE, where the pre-configuration information includes the small station identification information and the small station connection information.

Step 3031-3036: After receiving the pre-configuration information, the UE determines the small station to be accessed, measures the signal quality of the small station to be accessed, and establishes a connection with the small station whose signal quality meets the communication service condition. Obtain the communication services provided by the accessing stations, including:

3031: After receiving the pre-configuration information of the candidate small station sent by the macro station, the UE determines, according to the small station identification information, the small station to be accessed.

After receiving the pre-configuration information of the candidate small station sent by the macro station, the UE may learn the specific location of the candidate small station according to the small station address location information or the small station service area identification information in the small station identification information. And determining a relative distance between the UE and the candidate small station according to the current location of the UE, and selecting an alternate small station with the closest relative distance as the small station to be accessed.

3032: The UE measures the signal quality of the small station to be accessed.

The signal quality of the small station that establishes the connection with the UE needs to meet the service requirement. Therefore, after determining the small station to be accessed, the UE needs to determine whether the signal quality of the small station to be accessed can provide normal communication service for the UE. . For example, the UE may determine whether the signal quality of the small station to be accessed is satisfied by measuring RSRP (Reference Signal Receiving Power) or RSRQ (Reference Signal Receiving Quality) of the small station. Service requirements.

Optionally, two signal quality thresholds are set, which are respectively a first threshold value and a second threshold value, where the first threshold value is smaller than the second threshold value, when the measured preparation is small The signal quality value of the station is less than the first threshold, and the UE cannot establish a connection with the small station; when the measured signal quality value of the small station to be accessed is greater than or equal to the first threshold and less than the second threshold The value, the UE can access the small station, but the small station can not provide normal communication service for the UE; when the measured signal quality value of the small station to be accessed is greater than or equal to the second threshold, the small station can Provide normal communication services for the UE. The second threshold is the lowest value of the RSRP or RSRQ that the UE can communicate with the small station. The first threshold is selected according to the second threshold. That is, the first threshold = the second threshold. The value -△ can be determined according to the network statistics, or the experience value can be arbitrarily selected according to actual needs. For example, if the RSRP of the UE and the small station can communicate normally is -30db, the second threshold is -30db, and the first threshold is -35db. When the RSRP of the small station reaches -35db, the UE is close to the small station. , a random access request can be sent to the small station, but normal communication cannot be performed yet. Due to random Both the access request and the response transmission have a delay, so before the UE measures that the small station signal quality satisfies the normal communication requirement, that is, the UE sends a random access request to the small station before completing the small station coverage area completely, and completes the random access request with the small station. During the connection process, the small station can provide services to the UE immediately after it enters the coverage of the station.

3033: When the UE determines that the signal quality of the small station to be accessed is greater than or equal to the first threshold, the UE may use the dedicated PRACH resource included in the small station connection information in the pre-configuration information of the small station to the small The station initiates a random access request.

3034: After receiving the random access request, the small station that the UE prepares to access feeds back a random access response (RAR) to the UE.

Optionally, the embodiment of the present invention may further include steps 3035-3036, specifically:

3035: The small station that the UE prepares to access, while feeding back the RAR to the UE, sends a message to the macro station, indicating that the UE has accessed the small station.

3036: The macro station schedules data transmission between the UE and the small station after receiving the message that the UE has accessed the small station.

In step 3036, the macro station may use a macro station central scheduling mode to schedule data transmission between the UE and the accessed small station. The macro station uniformly allocates the time-frequency resources required by the macro station and the small station in the data transmission process of the small station and the UE, and can better perform interference coordination; meanwhile, the data required by the UE is backed up by the macro station after being backed up on the macro station. The small station is sent directly to the UE via the small station, and no small station is required to schedule data transmission between itself and the UE. After the UE leaves the small station, the small station does not need to transmit the remaining data back to the macro station, thereby avoiding the macro station. Repeated data interaction with the small station.

Optionally, after the UE obtains the service provided by the accessed station, the method in this embodiment may further include steps 3041-3044.

Steps 3041-3044: After leaving the accessed small station coverage area, the UE releases the pre-configuration information of the accessed small station.

The UE may terminate the connection with the small station by deleting the received pre-configuration information of the accessed small station, and release the storage space. Optionally, the UE sends a MAC layer control message MAC CE (control element) to the macro station based on the judgment that the user is about to leave the small station coverage area, and notifies the macro station to terminate the data scheduling. The determining method may be: the UE determines whether it is about to leave the small station coverage area by its current location; or the UE measures the signal quality of the already accessed small station, and if the measured signal quality value is less than the signal quality threshold, The UE can judge that it is about to leave the small station coverage area. The signal quality threshold may be selected to be slightly lower than the lowest value that the UE can communicate with the small station, that is, the signal quality threshold = the lowest value of the normal communication + Δ, which may be determined according to network statistics, or may be arbitrarily according to actual needs. Choose to choose an experience value. For example, if the minimum RSRP value of the small station can communicate normally is -30 db, the signal quality threshold can be selected as -25 db. At this time, the UE is about to leave the small station coverage area. Since the MAC CE message transmission is delayed, by transmitting the MAC CE message in advance, it can ensure that the UE can release the pre-configuration information of the small station immediately after leaving the coverage area of the small station, and accordingly, the macro station can immediately terminate the scheduling station and the UE. The data is transmitted between and indicates that the small station releases the UE context, thereby achieving a quick release between the UE and the small station.

Steps 3041-3044 can be specifically:

3041: The UE predicts a small station that is about to leave the access based on the current location or the signal quality measurement result of the small station that has been accessed.

3042: The UE sends a MAC CE message carrying a release indication to the macro station, and instructs the macro station to send a message for releasing the UE context to the accessed small station.

3043: After the MAC CE message transmission is completed, the UE releases the pre-configured information of the accessed small station.

3044: After receiving the foregoing MAC CE message, the macro station terminates scheduling data transmission between the UE and the accessed small station, and sends a message to the accessed small station, instructing the small station to release the UE context.

Steps 3041-3044 can be used to quickly terminate the connection between the UE and the small station, thereby realizing rapid recovery of resources on the network side and saving UE energy consumption. In still another embodiment of the present invention, a small station communication method is provided. Referring to FIG. 5, steps 401, 4021-4024, and 4031-4036 refer to step 301 in the embodiment shown in FIG. 3021-3024, 3031-3036;

The difference from the embodiment shown in Figure 4 is that steps 4041-4043:

4041: The macro station continuously performs N times (N>2, N is an integer). The data transmission between the UE and the accessed small station is unsuccessful.

For example, the macro station schedules the UE uplink data, but the small station does not receive the uplink data, and the macro station does not receive the acknowledgement message sent by the small station, or the macro station continuously sends the downlink data to the small station, and the small station sends the uplink data to the UE. However, if the small station fails to transmit, it can be considered that the UE has left the accessed small station.

4042: The UE releases the pre-configured information of the received small station.

4043: The macro station terminates scheduling data transmission between the UE and the accessed small station, and sends a message to the accessed small station, instructing the small station to release the UE context.

In the embodiment of the present invention, the macro station determines the data transmission between the UE and the small station to terminate the data transmission between the UE and the small station, and ensures that the UE does not send the MAC on the premise of realizing the fast connection between the UE and the small station. In the case that the CE message or the MAC CE message fails to be transmitted, the UE and the small station can still achieve a fast release. In another embodiment of the present invention, a small station communication method is provided. Referring to FIG. 6, wherein steps 501, 5021-5023, and 5031-5036 refer to steps 301, 3021-3023 in the embodiment shown in FIG. , 3031-3036;

The difference from the embodiment shown in FIG. 4 is that, in step 5024, the macro station sends the pre-configuration information of the candidate small station of the UE to the UE, and the small station pre-configuration information further includes the connection effective time of the small station.

Optionally, the connection validity time may be previously sent to the macro station by the small station before the UE has not accessed the macro station; or may be determined by the macro station according to the moving speed of the UE, where the moving speed of the UE is faster The shorter the connection effective time of the small station can be set, and the slower the moving speed of the UE, the longer the connection effective time of the small station can be set. Alternatively, the connection validity time of the small station may be determined according to statistical values of the network or determined according to empirical values. For example, the effective time can be set to 10ms. Correspondingly, steps 5041-5043 can be:

5041: The UE and the macro station respectively measure whether the connection time between the UE and the accessed small station exceeds the connection effective time of the small station, where the UE starts to measure after receiving the RAR of the small station; and the small station feeds back the RAR to the UE. Sending a message to the macro station indicating that the UE has accessed, and the macro station starts measuring after receiving the indication message.

5042: When the connection time between the UE and the accessed small station exceeds the validity time of the connection, the UE actively releases the accessed pre-configuration information of the station.

5043: When the connection time between the UE measured by the macro station and the accessed small station exceeds the connection validity time, the macro station automatically terminates the data transmission between the scheduled UE and the accessed small station, and sends the data transmission to the small station. A message indicating that the station releases the UE context.

The embodiment of the present invention sets the connection effective time of the small station and sends it to the UE as a component of the pre-configuration information. When the connection time between the UE and the small station exceeds the effective time of the connection, the default UE has left the accessed small station. The UE actively releases the pre-configuration information of the accessed small station, and the macro station automatically terminates the data transmission between the scheduling small station and the UE, reduces information interaction between the UE and the macro station, and implements the UE and the accessed small station. Rapid release between networks to improve network productivity. The embodiment of the present invention provides a macro station, which is applied to a heterogeneous network, where the heterogeneous network includes the macro station and at least one small station in the coverage area of the macro station. Referring to Figure 7, the macro station includes:

The connection transmission module 601 is configured to establish a connection with a user equipment UE that enters the coverage area of the macro station, and perform data transmission with the UE.

The station selection module 602 is configured to select, in the at least one small station, a small station that the UE may pass according to the motion trajectory of the UE, as an alternative station of the UE.

The sending module 603 is configured to send, to the UE, pre-configuration information of the candidate small station of the UE, where the pre-configuration information includes the small station identification information and the small station connection information.

Optionally, the small station selection module 602 further includes a mobile information receiving unit 6021, configured to receive mobile information that is periodically reported by the UE, where the mobile information includes a moving direction information or a moving track of the UE. The information may further include moving speed information of the UE. The mobile information may be used by the macro station to determine a small station that the UE may pass as an alternative station for the UE.

Optionally, the macro station further includes: a data scheduling module 604, configured to schedule data transmission between the UE and the accessed small station after the UE establishes a connection with the small station to be accessed.

The data scheduling module 604 is further configured to: determine that the UE has left the accessed small station, terminate data transmission between the scheduled UE and the accessed small station, and send a message to the small station, instructing the small station to release the UE Context. There are two implementations for this function of the data scheduling module 604:

The first mode: the data scheduling module 604 may be configured with a MAC CE message receiving unit 6041, configured to receive a MAC CE message that is sent by the UE and carry a release indication. If the MAC CE message is received, the UE may determine that the UE has left the connection. The incoming data station module 604 may terminate scheduling data transmission between the UE and the accessed small station, and send a message to the small station to instruct the small station to release the UE context.

The second mode: the data scheduling module 604 schedules UE and small station data transmission unsuccessfully for N consecutive times (N>2, N is an integer), for example, the macro station schedules UE uplink data transmission, but the small station does not receive the Data, the macro station thus does not receive the acknowledgement message sent by the small station, or the macro station continuously sends the downlink data to the small station, and the small station sends the downlink data to the UE, but if the small station sends the downlink data unsuccessfully, the UE may be considered to have left the connection. The incoming data station, the data scheduling module 604 automatically terminates the data transmission between the scheduling small station and the UE, and sends a message to the small station, instructing the small station to release the UE context.

The second method ensures that the UE and the small station can still achieve fast release without MAC CE signaling or MAC CE transmission failure.

In another embodiment, the macro station may further include a connection time measurement module 605: configured to measure a time used by the UE to access the small station, in this embodiment, the sending station 603 sends an alternate station to the UE. The pre-configuration information includes the connection validity time of the small station; the connection time measurement module 605 measures that the connection time between the UE and the accessed small station exceeds the validity time of the small station connection, and sends a message to the data scheduling. Module 604, the data scheduling module 604 then terminates the data transmission between the scheduling UE and the accessed small station.

The macro station shown in FIG. 7 provided by the embodiment of the present invention may be implemented by the small station communication method shown in FIG. 2-6. For the macro station in the example, the macro station shown in FIG. 7 can perform the small station communication method as shown in FIG. 2-6. For details, refer to the specific method embodiment shown in FIG. 2-6, and details are not described herein again. As shown in FIG. 8, the embodiment of the present invention further provides a user equipment UE, where the UE includes: a connection transmission module 701: configured to access the macro station, and perform data transmission with the macro station.

The receiving module 702 is configured to: receive pre-configuration information of the candidate small station of the UE that is sent by the macro station, where the candidate small station of the UE is selected by the macro station from the at least one small station, where the pre-configuration information is Includes small station identification information and small station connection information.

The station determining module 703 is configured to determine, in the candidate station, the station to be accessed according to the station identification information.

Specifically, after the receiving module 702 receives the pre-configuration information of the candidate small station, the small station determining module 703 determines the small station to be accessed based on the small station identification information. Specifically, the specific location of the candidate small station may be obtained according to the small station address location information or the small station service area identifier information in the small station identification information, and the UE and the location are determined according to the current location of the UE. For the relative distance of the alternative stations, the alternative station with the closest relative distance is selected as the station to be accessed.

The small station access module 704 is configured to establish a connection with the small station to be accessed according to the small station connection information.

Specifically, the small station access module 704 includes a small station signal quality measuring unit 7041 for measuring whether the signal quality of the small station to be accessed can provide a normal communication service for the UE. When the signal quality of the station to be accessed satisfies the service condition, the station access module 704 initiates a random access request to the station using the dedicated PRACH resource contained in the pre-configuration information of the station to be accessed.

Further, the small station access module 704 may include: a MAC CE sending unit 7042, configured to send a MAC CE message carrying a release indication to the macro station, and specifically, the UE measures the signal quality based on the current location or the small station. As a result, the small station that is about to leave the access is predicted, and the MAC CE message carrying the release indication is sent to the macro station, and the macro station is instructed to send a message for releasing the UE context to the small station accessed by the UE.

Further, the UE further includes a release module 705, which can be used to cancel the MAC CE. After the information transmission is completed, the pre-configuration information of the small station accessed by the UE is released.

Optionally, the UE may further include: a mobile information reporting module 706, configured to report, to the macro station, the mobile information, where the mobile information includes: the mobile direction information or the mobile trajectory information of the UE, and may further include The mobile speed information of the UE, the mobile information may be used by the macro station to determine a small station that the UE may pass as an alternative small station of the UE.

In another embodiment, the pre-configuration information of the candidate small station received by the receiving module 702 further includes: a connection validity time of the small station; the UE may further include: a connection time measurement module 707, configured to measure the UE access The time spent after the station. When the connection time measurement module 707 measures that the connection time between the UE and the accessed small station exceeds the small station connection validity time, sends a message to the release module 705, and the release module 705 releases the stored location. Pre-configuration information of the accessed small station.

The UE shown in FIG. 8 provided by the embodiment of the present invention may be the UE in the embodiment of the small station communication method shown in FIG. 2-6, and the UE shown in FIG. 8 may perform the small station communication as shown in FIG. 2-6. For details, refer to the specific method embodiment shown in Figure 2-6 above, and details are not described herein. As shown in FIG. 9, an embodiment of the present invention further provides a macro station, which is applied to a heterogeneous network, where the macro station includes the macro station, and the macro station covers at least one small station, and the macro station Includes:

The processor 801 is configured to establish a connection with a user equipment UE that enters the coverage area of the macro station, and perform data transmission with the UE, and select, in the at least one small station, a small station that the UE may pass, as the UE. Alternative station.

Transmitter 802: configured to send pre-configuration information of the candidate small station of the UE to the UE, where the pre-configuration information includes small station identification information and small station connection information.

The processor 801 may be further configured to: after the UE establishes a connection with the small station to be accessed, schedule data transmission between the UE and the accessed small station.

The processor 801 may be further configured to: determine that the UE has left the accessed small station, terminate data transmission between the scheduled UE and the accessed small station, and send a message to the small station, instructing the small station to release the UE Context. There are two implementations for this function of the processor 801: The first mode is: setting a receiver 803 in the macro station, configured to receive a MAC CE message that is sent by the UE and carries a release indication. If the receiver 803 receives the MAC CE message, it may be determined that the UE has left the connection. The incoming station may terminate the scheduling of data transmission between the UE and the accessed station.

The second mode: the processor 801 schedules the data transmission and reception failure of the UE and the accessed small station for N consecutive times (N>2, N is an integer), determines that the UE has left the accessed small station, and terminates the scheduling. Data transmission between the UE and the small station.

In another embodiment, the macro station further includes: a timer 804, configured to measure a time used by the UE to access the small station, in this embodiment, the alternate small station pre-configuration sent by the transmitter 801 The information also includes the effective time of the connection to the station. The timer 804 measures that the connection time between the UE and the accessed small station exceeds the validity time of the small station connection, sends a message to the processor 801, and the processor 801 then terminates scheduling the UE and accesses. The data transmission between the small stations, and sends a message to the small station, instructing the small station to release the UE context.

Further, the receiver may be configured to: receive mobile information that is periodically reported by the UE, where the mobile information includes: the mobile direction information or the mobile trajectory information of the UE, and further includes a moving speed information of the UE, where The mobile information can be used by the macro station to determine the small station that the UE may pass as an alternative station for the UE.

The macro station shown in FIG. 9 provided by the embodiment of the present invention may be a macro station in the embodiment of the small station communication method shown in FIG. 2-6, and the macro station shown in FIG. 9 may perform the method shown in FIG. 2-6. For the method of the small station communication, refer to the specific method embodiment shown in FIG. 2-6 above, and details are not described herein again. The embodiment of the present invention further provides a user equipment UE, which is applied to a heterogeneous network, where the heterogeneous network includes a macro station, and the macro station covers at least one small station. Referring to FIG. 10, the UE includes:

The receiver 901 is configured to receive pre-configuration information of a small station that the UE sends by the macro station, where the candidate small station is selected by the macro station from the at least one small station, where the pre-configuration information is used. Including small station identification information and small station connection information; The processor 902 is configured to access the macro station, perform data transmission with the macro station, and determine, according to the small station identification information, a small station to be accessed in the candidate small station, according to the small station The station connection information establishes a connection with the small station to be accessed.

Optionally, the UE further includes: a transmitter 903, configured to send a MAC CE message carrying a release indication to the macro station, and specifically, the transmitter predicts to leave based on the current location of the UE itself or the signal quality measurement result of the small station. The accessed small station sends a MAC CE message carrying a release indication to the macro station, instructing the macro station to send a message for releasing the UE context to the accessed small station.

The processor 902 is further configured to: after the MAC CE message is successfully sent, release the pre-configuration information of the small station accessed by the UE.

The transmitter 903 may be further configured to report the mobile information to the macro station, where the mobile information includes: the mobile direction information or the mobile trajectory information of the UE, and further includes the mobile speed information of the UE. The mobile information may be used by the macro station to determine a small station that the UE may pass as an alternative small station of the UE.

In another embodiment, the UE further includes: a timer 904, configured to measure a time used after accessing the small station; in this embodiment, the pre-configured information of the candidate small station received by the receiver 901 is further The method includes: a connection validity time of the small station; the timer 904 measures that the connection time between the UE and the accessed small station exceeds the validity time of the small station connection, and sends a message to the processor 902, where the processing is performed. The 902 releases the station pre-configuration information accessed by the UE.

The UE shown in FIG. 10 provided by the embodiment of the present invention may be the UE in the embodiment of the small station communication method shown in FIG. 2-6, and the UE shown in FIG. 10 may perform the small station communication as shown in FIG. 2-6. For details, refer to the specific method embodiment shown in Figure 2-6 above, and details are not described herein. The embodiment of the present invention further provides a network system, including the macro station in the foregoing embodiment shown in FIG. 7 or FIG. 9, and the user equipment in the embodiment shown in FIG. 8 or FIG. 10, and the macro in the network system. The station and the user equipment can be arbitrarily combined. For example, the macro station shown in FIG. 7 and the user equipment shown in FIG. 8 can be used; or the macro station shown in FIG. 9 and the user equipment shown in FIG. 10 are not limited. Macro station and user setting in the network system The macro station and the user equipment described in the embodiment of the small station communication method shown in FIG. 2-6 can be executed, and the small station communication method shown in FIG. 2-6 can be executed. For details, refer to FIG. 2-6. Specific method embodiments are shown, and details are not described herein again.

The above two embodiments of the present invention pre-configure the small station that the UE in the macro station coverage area may be pre-configured to the UE by the macro station determining the small station that the UE may pass, and transmitting the pre-configuration information of the small station to the UE. The UE does not need to discover the small station and report the macro station, which reduces the time required for the UE to establish a connection with the small station, and can also increase the time for the small station to provide the service for the UE. Even if the UE is in a high-speed motion, the method provided by the embodiment of the present invention can still effectively access the small station and obtain the communication service provided by the small station. Moreover, according to the method provided by the embodiment of the present invention, the data throughput of the UE is improved, and the energy consumption of the UE is saved.

It can be clearly understood by those skilled in the art that for the convenience and cleanness of the description, the specific working processes of the devices and modules described above can be referred to the corresponding process descriptions in the foregoing method embodiments.

In the several embodiments provided herein, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be another division manner, for example, multiple modules or components may be combined or Can be integrated into another device, or some features can be ignored, or not executed.

In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, and each module may exist physically separately, or two or more modules may be integrated into one module.

A person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable medium. The storage medium to which it is obtained may be a read only memory, a magnetic disk or an optical disk or the like.

It should be noted that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., should be made within the spirit and principles of the present invention. It is included in the scope of protection of the present invention.

Claims

Rights request

A small station communication method, characterized in that the method is applied to a heterogeneous network, wherein the heterogeneous network includes a macro station, and the macro station covers at least one small station, and includes:

User equipment UE accesses the macro station, and performs data transmission with the macro station;

Receiving, by the UE, the pre-configuration information of the candidate small station of the UE that is sent by the macro station, where the candidate small station of the UE is selected by the macro station from the at least one small station, the pre-configuration information It includes small station identification information and small station connection information;

Determining, by the UE, the small station to be accessed in the candidate small station according to the small station identification information; the UE establishing a connection with the small station to be accessed according to the small station connection information.

The method according to claim 1, wherein the pre-configuration information further includes a connection validity time of the alternate station;

The method further includes:

When the connection time between the UE and the accessed small station exceeds the connection validity time, the UE releases the pre-configuration information of the accessed small station.

The method according to claim 1, wherein the method further comprises:

Transmitting, by the UE, a MAC layer control MAC CE message carrying a release indication to the macro station; and releasing, by the UE, pre-configuration information of the accessed small station.

4. The method according to claim 1, wherein the small station identification information comprises a small station overlay

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The method according to claim 4, wherein the small station coverage information comprises small station address location information and/or small station service area identification information.

The method according to claim 1-5, wherein the UE periodically reports mobile information to the macro station, and the mobile information is used to determine an alternate small station of the UE.

A small station communication method, characterized in that the method is applied to a heterogeneous network, the heterogeneous The network includes a macro station, and the macro station covers at least one small station, including:

The macro station establishes a connection with a user equipment UE that enters the coverage area of the macro station, and performs data transmission with the UE;

Determining, by the macro station, an alternate station of the UE from the at least one small station;

And the macro station sends pre-configuration information of the candidate small station of the UE to the UE, where the pre-configuration information includes small station identification information and small station connection information;

The method according to claim 7, wherein the method further comprises: after the UE establishes a connection with the small station to be accessed, the macro station schedules the UE and accesses Data transfer between small stations.

The method according to claim 8, wherein the macro station determines that the UE has left the accessed small station, and terminates scheduling data between the UE and the accessed small station. Transmitting, and sending a message to the accessed station, instructing the accessed station to release the context of the UE.

The method according to claim 9, wherein the determining, by the macro station, that the UE has left the accessing station comprises:

The macro station receives a MAC CE message that is sent by the UE and carries a release indication, and determines, according to the MAC CE message, that the UE has left the accessed station.

And when the macro station continuously schedules data transmission failure between the UE and the accessed small station, determining that the UE has left the accessed small station.

The method according to claim 7, wherein the pre-configuration information further includes a connection validity time of the candidate small station of the UE;

The method further includes:

When the connection time between the UE and the accessed small station exceeds the connection validity time, the macro station Terminating the data transmission between the UE and the accessed small station, and sending a message to the accessed small station, indicating that the accessed 'j, the station releases the context of the UE.

A macro station, which is characterized in that it is applied to a heterogeneous network, the heterogeneous network includes the macro station, and the macro station covers at least one small station, including:

a connection transmission module: configured to establish a connection with a user equipment UE that enters a coverage area of the macro station, and perform data transmission with the UE;

a small station selection module: an alternative small station for determining the UE from the at least one small station; a sending module: configured to send pre-configuration information of the candidate small station to the UE, The configuration information includes small station identification information and small station connection information;

The macro station according to claim 13, further comprising: a data scheduling module, configured to schedule the UE and the access after the UE establishes a connection with the small station to be accessed Data transfer between small stations.

The macro station according to claim 14, wherein the data scheduling module is further configured to: determine that the UE has left the accessed small station, and terminate scheduling the UE and the access Data transmission between the small stations, and sending a message to the accessed small station, instructing the accessed small station to release the context of the UE.

The macro station according to claim 15, wherein the data scheduling module further comprises: a MAC CE message receiving unit, configured to receive a MAC CE message that is sent by the UE and carries a release indication; Further, determining, according to the received MAC CE message, that the UE has left the accessed small station.

The macro station according to claim 15, wherein the data scheduling module is further configured to: continuously schedule data transmission failure of the UE and the accessed small station, and determine that the UE has left the Access to the small station.

18. The macro station according to claim 13, wherein the pre-configuration information further comprises the The connection validity time of the candidate station of the UE;

The macro station further includes: a connection time measurement module, configured to measure a time used by the UE to access the small station;

The data scheduling module is further configured to: when the connection time between the UE and the accessed small station exceeds the connection validity time, terminate scheduling data transmission between the UE and the accessed small station, And sending a message to the accessed small station, instructing the accessed small station to release the context of the UE.

The macro station according to any one of claims 13 to 18, wherein the small station selection module further comprises: a mobile information receiving unit, configured to receive mobile information reported by the UE periodically, the mobile information Used to determine an alternate station for the UE.

A user equipment (UE), which is applied to a heterogeneous network, where the heterogeneous network includes a macro station, and the macro station covers at least one small station, including:

a connection transmission module: configured to access the macro station, and perform data transmission with the macro station;

a receiving module: configured to receive pre-configuration information of the candidate small station of the UE sent by the macro station, where the candidate small station of the UE is selected by the macro station, and the pre-configuration information includes Small station identification information and small station connection information;

a small station determining module: configured to determine, in the candidate small station, a small station to be accessed according to the small station identification information;

The UE according to claim 20, further comprising: a release module, configured to release the pre-configured information of the station accessed by the UE.

The UE according to claim 21, wherein the small station access module comprises: a MAC CE sending unit, configured to send a MAC CE message carrying a release indication to the macro station.

The releasing module is further configured to: after the sending of the MAC CE message, release pre-configuration information of the small station accessed by the UE.

The UE according to claim 21, wherein the pre-configuration information further includes a backup of the UE. Select the effective time of the connection of the station;

The method further includes: a connection time measurement module, configured to measure a time used by the UE to access the small station; the release module is further configured to: when the connection time between the UE and the accessed small station exceeds the connection The effective time, releasing the pre-configuration information of the accessed small station.

The UE according to any one of claims 20 to 23, further comprising: a mobile information reporting module, configured to report, to the macro station, mobile information, where the mobile information is used to determine an alternative size of the UE station.

a processor: configured to establish a connection with a user equipment UE that enters the macro station coverage area, and perform data transmission with the UE; and select a small station that the user equipment UE may pass in the at least one small station; Transmitting, by the UE, the pre-configuration information of the candidate small station of the UE, where the pre-configuration information includes the small station identification information and the small station connection information;

The macro station according to claim 25, wherein the processor is further configured to: after the UE establishes a connection with the small station to be accessed, schedule the UE and access the small Data transfer between stations.

The macro station according to claim 26, wherein the processor is further configured to: determine that the UE has left the accessed small station, and terminate scheduling the UE and the accessed small station. Inter-data transmission, and sending a message to the accessing station, indicating that the accessed station releases the context of the UE.

The macro station according to claim 27, further comprising: a receiver, configured to receive a MAC CE message that is sent by the UE and carries a release indication;

The processor is further configured to determine, according to the received MAC CE message, that the UE has left the accessed station.

29. The macro station according to claim 27, wherein the processor is further configured to connect The data transmission failure of the UE and the accessed small station is continuously scheduled, and it is determined that the UE has left the accessed small station.

The macro station according to claim 25, wherein the pre-configuration information further includes a connection validity time of the candidate small station of the UE;

The method further includes: a timer, configured to measure a time taken by the UE to access the station;

The processor is further configured to: if the time taken by the UE to access the small station exceeds the connection validity time, terminate scheduling data transmission between the UE and the accessed small station, and The accessed small station sends a message indicating that the accessed small station releases the context of the UE.

The macro station according to any one of claims 25-30, wherein the receiver is further configured to: receive mobile information that is periodically reported by the UE, where the mobile information is used to determine a backup of the UE. Pick a small station.

Receiver: configured to receive pre-configuration information of a small station that the UE sends by the macro station, where the candidate small station is selected by the macro station from the at least one small station, where the pre-configuration information is included Small station identification information and small station connection information;

The UE according to claim 32, wherein the pre-configuration information further includes a connection validity time of a small station that the UE may pass;

The method further includes: a timer, configured to measure a time taken by the UE to access the small station;

The processor is further configured to: when the connection time between the UE and the accessed small station exceeds the connection validity time, release the pre-configuration information of the accessed small station.

The UE according to claim 32, further comprising: a transmitter, configured to send a MAC CE message carrying a release indication to the macro station;

The processor is further configured to: release the accessed station after the MAC CE message is sent Pre-configured information.

The UE according to claim 34, wherein the transmitter is further configured to report the mobile information to the macro station periodically, where the mobile information is used to determine an alternate small station of the UE.

36. A network system, characterized in that it is applied to a heterogeneous network, the heterogeneous network comprising a macro station, the macro station covering at least one small station, the network system comprising: claim 13-19 or The macro station of claims 25-31; the user equipment UE of claims 20-24 or 32-35.