CN108293218B

CN108293218B - Information transmission method, base station and communication system

Info

Publication number: CN108293218B
Application number: CN201580084923.2A
Authority: CN
Inventors: 邓天乐; 彭文杰
Original assignee: Huawei Technologies Co Ltd
Current assignee: XFusion Digital Technologies Co Ltd
Priority date: 2015-12-01
Filing date: 2015-12-01
Publication date: 2020-07-07
Anticipated expiration: 2035-12-01
Also published as: WO2017091988A1; CN108293218A

Abstract

The embodiment of the invention provides an information transmission method, a base station and a communication system. The information transmission method comprises the steps that a first base station broadcasts public system information of at least one base station, wherein a communication interface exists between the at least one base station and the first base station, the first base station determines a second base station which is suitable for User Equipment (UE) to access in the at least one base station, and sends the special system information of the second base station to the UE by combining with the second base station, so that the system information can be effectively transmitted, further, the first base station serving as a macro station broadcasts public system information of a plurality of small stations, the situation that each small station repeatedly broadcasts the same system information can be avoided, and air interface resources of the small stations are saved.

Description

Information transmission method, base station and communication system

Technical Field

The embodiment of the invention relates to the field of wireless communication, in particular to an information transmission method, a base station and a communication system.

Background

With the continuous development of mobile broadband services, the currently used low-frequency resources cannot meet the service requirements of users. Because the high-frequency resources are richer than the low-frequency resources and the bandwidth is larger, the development of the high-frequency resources becomes an important research field for improving the throughput of users.

In an evolution system of a fourth generation (4th generation, 4G) communication system, a networking mode in which a low-frequency macro station and a high-frequency small station jointly form a network may be adopted. Specifically, a plurality of high-frequency small stations may be deployed within the coverage area of one low-frequency macro station, the high-frequency small stations supplement and enhance the signal coverage of the low-frequency macro station, and User Equipment (UE) in the coverage area of the high-frequency small stations may receive system information broadcast by the high-frequency small stations. However, the system information transmission efficiency is low by broadcasting the system information by the small station.

Disclosure of Invention

The embodiment of the invention provides an information transmission method, a base station and a communication system, which can effectively transmit system information.

In a first aspect, an embodiment of the present invention provides an information transmission method, including that a first base station broadcasts public system information of at least one base station; the first base station sends a notification message that the UE is suitable for accessing the second base station to the second base station, wherein the second base station belongs to the at least one base station; and the first base station and the second base station are combined, and the first base station sends the proprietary system message of the second base station to the UE.

In one possible implementation, the first base station is a macro station, the at least one base station is at least one small station within a coverage area of the macro station, and the second base station is a small station selected by the first base station from the at least one small station.

By adopting the information transmission method provided by the embodiment of the invention, the public system information of at least one base station is broadcasted by the first base station, and the special system information of the second base station is sent to the UE by combining the second base station, so that the system information of the second base station can be effectively transmitted.

In one possible implementation, the method further includes the first base station sending random access configuration information to the UE, so that the UE sends a random access preamble to the at least one base station; and the first base station receives a feedback message sent by the at least one base station after receiving the random leader sequence, wherein the feedback message comprises the identifier of the UE.

In a possible implementation manner, the feedback message further includes a base station load and a signal strength of the random access preamble sequence.

In a possible implementation manner, the first base station determines the second base station according to a base station load fed back by the at least one base station and the signal strength of the random access preamble.

The first base station initiates and configures a non-competitive random access process between the UE and the at least one base station, and can select a proper second base station for the UE according to the information fed back by the at least one base station, thereby realizing effective management of wireless resources.

In a possible implementation manner, the first base station, in conjunction with the second base station, sends the UE a dedicated system message of the second base station, including that the first base station instructs the second base station to send the dedicated system message to the first base station; and the first base station receives the proprietary system information and forwards the proprietary system information to the UE.

The first base station broadcasts the public system information of the second base station and forwards the special system information of the second base station to the UE, so that the reliability of system information transmission is improved. Furthermore, the public system information of a plurality of small stations is broadcasted by the first base station as the macro station, so that the situation that each small station repeatedly broadcasts the same system information can be avoided, and the air interface resources of the small stations are saved.

In a possible implementation manner, the first base station, in conjunction with the second base station, sends the proprietary system message of the second base station to the UE, including that the second base station broadcasts the proprietary system message according to the indication of the first base station. The small station can broadcast the special system information according to the indication of the macro station, so that the air interface resource of the small station is saved.

In a second aspect, an embodiment of the present invention provides an information transmission method, in which a second base station receives a notification message sent by a first base station, where UE is suitable for accessing the second base station; and the second base station is combined with the first base station to send a system message special for the second base station to the UE, wherein the base station belongs to at least one base station, and public system information of the at least one base station is broadcasted by the first base station.

In a possible implementation manner, the second base station, in combination with the first base station, sends the proprietary system message of the second base station to the UE, where the sending, by the second base station, the proprietary system message to the first base station according to the indication of the first base station is included, so that the first base station forwards the proprietary system message to the UE.

In a possible implementation manner, the first base station, in conjunction with the second base station, sends the proprietary system message of the second base station to the UE, including that the second base station broadcasts the proprietary system message according to the indication of the first base station.

By adopting the information transmission method provided by the embodiment of the invention, the second base station is combined with the first base station to send the special system information of the second base station to the UE, so that the system information of the small station can be effectively transmitted, and the reliability of system information transmission is improved.

In a third aspect, an embodiment of the present invention provides a base station, where the base station has a function of executing the first base station in the above method design. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. The modules may be software and/or hardware.

In one possible implementation, the base station includes a processor, a first transmitter and a second transmitter, the first transmitter is configured to broadcast common system information of at least one base station, and a communication interface exists between the at least one base station and the first base station. A second transmitter configured to transmit a notification message to a second base station that the UE is suitable for accessing the second base station, the second base station belonging to the at least one base station. A processor configured to send, in conjunction with the second base station, a system message specific to the second base station to the UE.

In a fourth aspect, an embodiment of the present invention provides a base station, where the base station has a function of implementing the second base station in the above method design. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. The modules may be software and/or hardware.

In one possible implementation manner, the structure of the base station includes a receiver and a processor, the receiver is configured to receive a notification message sent by a first base station and indicating that a UE is suitable for accessing the base station, and the base station belongs to at least one base station with which a communication interface exists between the base station and the first base station. The processor configured to transmit, in conjunction with the first base station, a system-specific message of the base station to the UE.

In a fifth aspect, an embodiment of the present invention provides a communication system, where the communication system includes the base station in the third aspect and the base station in the fourth aspect.

In a sixth aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for a base station according to the third aspect, which includes a program designed to execute the above aspects.

In a seventh aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for a base station according to the fourth aspect, which includes a program designed to execute the above aspects.

By adopting the technical scheme provided by the embodiment of the invention, the system information of the base station can be effectively transmitted to the UE, and the air interface resource of the base station is saved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of an application scenario according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of another application scenario of the embodiment of the present invention;

fig. 3 is a schematic flowchart of an information transmission method according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating an information transmission method according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating an information transmission method according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating an information transmission method according to an embodiment of the present invention;

fig. 7 is a flowchart illustrating an information transmission method according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a first base station according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a second base station according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a first base station according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a second base station according to an embodiment of the present invention;

fig. 13 is a schematic diagram of a communication system 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 apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The techniques described herein may be used in various communication systems, such as current 2G, 3G, 4G communication systems and next generation communication systems, such as Global System for Mobile communications (GSM), Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Wideband Code Division Multiple Access (WCDMA), Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, FDMA (SC-FDMA) systems, General Packet Radio Service (GPRS) systems, Long Term Evolution (Long Term Evolution, Evolution follow-up) systems, and other single carrier communication systems like LTE systems.

The macro station related to the embodiment of the present invention may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base station (NodeB) in WCDMA, an evolved Node B (NodeB or eNB or e-NodeB) in LTE, or similar Base station equipment in a communication system for subsequent evolution of LTE.

The small stations related to the embodiment of the invention include but are not limited to the following: a micro base station (micro base station), a pico base station (pico base station), a femto base station (femto base station), and an Access Point (AP), which is not limited in this embodiment of the present invention.

In the embodiment of the present invention, the communication system and the communication network are equivalent in concept, for example, the communication network including the first base station and the second base station is equivalent to the communication system including the first base station and the second base station, and the embodiment of the present invention will be described in the communication system in a unified manner.

The UE to which the present invention relates may include a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing device connected to a wireless modem with wireless communication function, and various forms of user equipment, a Mobile Station (MS), a terminal (terminal), a terminal equipment (terminal equipment), and the like, which are simply referred to as user equipment or UE in this application for convenience of description.

The embodiment of the invention defines the unidirectional communication link from the base station to the UE as a downlink and the unidirectional communication link from the UE to the base station as an uplink.

The resources in the embodiments of the present invention are transmission resources, including time domain resources and frequency domain resources, and may be used for carrying data or signaling in an uplink communication process or a downlink communication process. That is, the resource described in the embodiment of the present invention may be an uplink resource allocated by the base station to the UE, and used for the UE to send uplink data; or the downlink resource allocated by the base station to the UE may be used for the UE to receive downlink data.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The scheme provided by the embodiment of the present invention may be applicable to various networking scenarios, for example, a communication network composed of a macro station and a small station, or a communication network composed of a macro station and a macro station, and this is not particularly limited in the embodiment of the present invention. It can be understood that each base station in each networking scenario may be of the same type, or of different types, for example, in a scenario where a macro station and a small station are networked, the macro station and the small station may both be base stations of LTE type; or the macro station is a base station of an LTE system, and the small station is a base station of a subsequent LTE evolution system, such as a small station adopting a fifth generation (5th generation, 5G) communication technology; for example, in a scenario where the macro station is networked with the macro station, both macro stations may be enbs, or macro stations employing 5G communication technology, and both macro stations are neighboring base stations.

The system information described in the embodiment of the present invention may include various system information used in an LTE system, and also include various system information used in a 5G system. The public system information in the embodiment of the invention refers to system information shared by more than two base stations, namely the type, content or value of the system information are the same; the proprietary system information refers to system information only adapted to a certain base station, i.e., each base station has the same type of system information but different information contents or values. Therefore, the public system information and the proprietary system information are relatively speaking, taking a scenario of networking a macro station and a small station as an example, the system information of each small station may include a basic waveform parameter, and if values of the basic waveform parameters of the small stations are the same, the basic waveform parameter may be used as the public system information; if the values of the basic waveform parameters of the respective small stations are different, the basic waveform parameters can be used as proprietary system information. For another example, when there is only one small station in the coverage area of the macro station, for example, in a scenario where the macro station is co-located with the small station, the common system information and the private system information of the small station may not be distinguished, and all the system messages of the small station may be broadcast by the macro station.

Fig. 1-2 are schematic diagrams of two application scenarios to which the embodiment of the present invention is applicable.

In the communication network shown in fig. 1, a macro station is included, and 4 independent small stations are deployed in a coverage area (coverage area) of the macro station, including a small station 1 and a small station 2. As shown in fig. 1, the coverage areas of the small stations may be non-overlapping with each other; the coverage areas of any two small stations may also have overlapping portions, such as small station 1 and small station 4 shown in fig. 1.

As shown in fig. 2, in the communication network, the macro station and the small station may be co-sited, that is, the macro station and the small station are located at the same site (site).

It is understood that the coverage area of the macro station or the small station refers to a spatial range to which a signal transmitted by the macro station or the small station can radiate, and the coverage area may also be referred to as a signal coverage area or a signal coverage area. In the embodiment of the present invention, a coverage area of a macro station is called a macro cell (macro cell) and is used for meeting the requirements of mobility and seamless coverage of a UE; the small station is used for supplementing the coverage of the macro station and is responsible for user data transmission in a specific area in the macro cell, such as a blind spot or an edge area. The smaller hot spot area covered by a small station and located in a macro cell is called a micro cell or a small cell (small cell).

After entering the macro cell, the UE may access the macro station and establish a control plane at the macro station. When downlink service data needs to be transmitted, the downlink service data can be sent to the UE through the macro station or can be sent to the UE through the appropriate small station. The macro station can work in a low frequency band, and the small station can work in a high frequency band. The high-frequency band signal is easy to be interfered due to weak diffraction and diffraction capability, and has serious path loss and poor information transmission reliability in the transmission process.

Fig. 3 is a flowchart illustrating an information transmission method according to an embodiment of the present invention. The method comprises steps S301-S303:

s301: the first base station broadcasts common system information of the at least one base station.

It will be appreciated that there is a communication interface between the at least one base station and the first base station. The communication interface refers to a logical interface existing between any one of the at least one base station and the first base station, and may be a communication interface between existing base stations or a newly established communication interface. The communication interface may be fixed, like an X2 interface between enbs in an LTE system, or may be event-triggered to be established, which is not particularly limited in the present invention. After the initial establishment of the communication interface is completed, the first base station and any one of the at least one base station can perform information interaction and data transmission through the communication interface. The physical medium of the communication interface may be a connection manner such as a copper cable, a microwave, an optical fiber, and the like, which is not particularly limited in this embodiment of the present invention.

Optionally, the coverage area of the at least one base station may be within the coverage area of the first base station; alternatively, the coverage area of the at least one base station may partially overlap with the coverage area of the first base station; alternatively, the coverage area of the at least one base station is independent of the coverage area of the base station, i.e. there is no overlapping part of the two.

Alternatively, the first base station may be a macro station and the at least one base station may be at least one small station deployed within a coverage area of the macro station.

Optionally, the at least one base station may be a neighboring base station of the first base station.

Wherein the common system information is system information shared by the at least one base station.

The Public system information may include the same system information used by each small station, such as a frequency point, a bandwidth, a Public Land Mobile Network (PLMN) identifier, and the like, and when the at least one base station is a small station, the Public system information may further include information such as a basic waveform parameter of the small station, which is not particularly limited in this embodiment of the present invention.

S302: and the first base station sends a notification message that the UE is suitable for accessing the second base station to the second base station, wherein the second base station belongs to the at least one base station.

Wherein the UE has access to the first base station, and a control plane is established at the first base station.

Optionally, the first base station may select a second base station suitable for the UE to access from the at least one base station. Specifically, the first base station may select the second base station from the at least one base station according to measurement information reported by the UE, where the measurement information indicates a signal reception strength of the at least one base station.

It is to be understood that the UE may measure the signal reception strength of each of the at least one base station and form a measurement report including the signal reception strength of each base station to the first base station.

S303: and the first base station and the second base station are combined, and the first base station sends the proprietary system message of the second base station to the UE.

The dedicated System Information includes other System Information configured by the second base station besides the public System Information broadcasted in S301, and at least includes System Information that is not broadcasted by the macro station in a Master Information Block (Master Information Block, MIB), a System Information Block Type one (SIB 1, SIB Type 1), and a System Information Block Type two (SIB 2), such as Information of a Physical HARQ Indicator Channel (PHICH) configuration, a System frame number, an antenna configuration, and the like.

Optionally, the first base station, in conjunction with the second base station, sends a dedicated system message of the second base station to the UE, including that the first base station instructs the second base station to send the dedicated system message to the first base station; and the first base station receives the proprietary system information and forwards the proprietary system information to the UE.

Optionally, the first base station, in combination with the second base station, sends a dedicated system message of the second base station to the UE, where the dedicated system message includes that the first base station instructs the second base station to broadcast the dedicated system message, and the UE acquires the dedicated system message according to the broadcast of the second base station.

Optionally, the first base station operates in a low frequency band, and the at least one base station operates in a high frequency band. The high frequency band in the embodiment of the present invention may be, for example, a frequency band of 3.5GHz (megahertz), 5.2GHz, 5.6GHz, 5.8GHz, and the like, which is not particularly limited in the embodiment of the present invention.

By adopting the information transmission method provided by the embodiment of the invention, the first base station broadcasts the public system information of at least one base station, the first base station determines a second base station suitable for UE to access in the at least one base station, and the first base station combines the second base station to send the special system information of the second base station to the UE, thereby effectively transmitting the system information of the second base station; further, in a scenario where the macro station and the plurality of small stations are networked together, the first base station serving as the macro station broadcasts the common system messages of the plurality of small stations, so that the situation that each small station broadcasts the same system message repeatedly can be avoided, and air interface resources of the small stations are saved.

Fig. 4 is a signaling flow diagram of an information transmission method according to an embodiment of the present invention. As shown in fig. 4, the communication network to which the information transmission method is applied includes a macro station, a UE accessing the macro station, a small station 1 and a small station 2, where the small station 1 and the small station 2 and the macro station have communication interfaces respectively.

It will be appreciated that the small stations 1 and 2 are for illustration purposes only and are not intended to limit the number of small stations. In a practical scenario, a single or multiple small stations may be located under one macro station.

The method comprises steps S401-S4010:

s401: the macro station broadcasts common system information.

The common system information is system information shared by the small station 1 and the small station 2, and may include information such as a frequency point, a bandwidth, and a PLMN identifier.

The common system information may be stored within the macro station.

S402: and the UE reports the measurement information to the macro station.

Before accessing the small stations, the UE needs to implement downlink synchronization with each small station. Alternatively, the UE may synchronize directly to the small station; the downlink synchronization method can also be synchronized to the small station according to the time slot relationship between the macro station and the small station through synchronization with the macro station.

Alternatively, in order to achieve downlink synchronization with the UE, each small station may keep broadcasting the synchronization signal to the outside. The UE carries out downlink time-frequency synchronization with the small stations receiving the synchronization signals by detecting the synchronization signals of the small stations, determines the length of a Cyclic Prefix (CP), acquires the identification of a physical cell and determines the duplex mode (FDD/TDD) of the system. The UE may calculate the signal reception strength of the small station by using the detected synchronization signals of the plurality of small stations, and form a measurement information report to the macro station. Optionally, the Synchronization Signal may include a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) in LTE, or may be a Synchronization Signal in another form in a 5G system, which is not particularly limited in this embodiment of the present invention.

Optionally, when the UE is synchronized to the cell, the macro station may first locate the UE in the coverage of some cell, and then configure a dedicated reference signal for the UE on the located cell, and the UE calculates the signal reception strength of the cell by using the acquired dedicated reference signal, and forms measurement information to report to the macro station. Alternatively, the dedicated reference signal may be configured by the macro station and sent to the UE by means of a dedicated signaling. The embodiment of the present invention does not limit the type of the dedicated reference Signal, and may be a Channel State Information-reference Signal (CSI-RS) or other reference signals.

Alternatively, the signal reception strength of the small station may be represented by, but not limited to, at least one of the following parameters:

reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Channel Quality Indicator (CQI), Received Signal Strength Indicator (RSSI).

S403: and the macro station determines a small station suitable for the UE to access according to the received measurement information.

Specifically, the macro station receives measurement information reported by the UE, for example, RSSI of each cell, and selects a suitable cell for the UE to access according to the measurement information, thereby completing the decision process. Alternatively, the macro station may consider the load situation of the small station in addition to the signal reception strength indicated by the measurement information. The macro station may obtain the load condition of the small station through information interaction with the small station, where the information interaction may include transport network layer load, hardware load, composite available capacity, and the like.

For convenience of description, the "small station suitable for UE access" appearing in the embodiment of the present invention may also be simply referred to as "selected small station". In the embodiment of the present invention, it is assumed that the small station selected by the macro station is the small station 1.

It can be understood that, by using the method provided by the embodiment of the present invention, the macro station may determine at least one small station suitable for the UE to access, that is, the UE may access at least one small station, and the small station 1 is taken as the selected small station in the embodiment of the present invention for illustration and explanation only, and does not constitute any limitation on the number of small stations selected by the macro station.

S404: the macro station sends an indication message to the small station 1, instructing the small station 1 to send the proprietary system information to the macro station.

Alternatively, the indication message may be a proprietary system information request message.

Specifically, after the macro station completes the decision process, the selected small station may be informed of the decision result by means of a request message, and request its specific system information from the selected small station for forwarding to the UE.

Optionally, after the selected cell receives the indication message, the method may further include step S405: the small station 1 transmits an Acknowledgement message (ACK) to the macro station. The indication message may be sent again after a period of time if the macro station does not receive the confirmation message.

Alternatively, as an embodiment of the present invention, the macro station may request updated proprietary system information of the selected small stations. Specifically, because a communication interface exists between the macro station and the small station, system information interaction is already performed after the initial establishment of the communication interface is completed. Therefore, when a UE requests access to a cell, the macro station does not need to request all its proprietary system information from a selected cell, but only needs to request updated partial proprietary system information. Further, the proprietary system information may be divided into two categories, one is static proprietary system information that does not change for a long time, such as antenna configuration, and the macro station may obtain such information during initial system information interaction. Another type is dynamic proprietary system information that may change periodically or aperiodically, such as the system frame number, which the macro station needs to request from selected small stations.

S406: the macro station transmits a notification message to the UE.

Specifically, the macro station notifies the UE of the decision result by using a notification message, where the notification message may carry identification information of a small station selected by the macro station.

It should be noted that step S404 and step S406 have no fixed execution precedence relationship. The steps may be executed in the above order, or first step S406 is executed, and then step S404 is executed, or two steps may be executed simultaneously, which is not particularly limited in the embodiment of the present invention.

S406: the small station 1 transmits the proprietary system information to the macro station.

The selected small station, upon receiving the above indication message, may transmit all system information except the common system information broadcast by the macro station in S401 to the macro station.

Alternatively, in another embodiment of the present invention, the small station may periodically send the proprietary system information to the macro station after learning the decision result of the macro station, or may spontaneously send updated proprietary system information to the macro station when the proprietary system information changes.

S407: the macro station forwards the proprietary system information of the small station 1 to the UE.

Alternatively, the macro station may send the dedicated system information to the UE by means of dedicated signaling, for example, Radio Resource Control (RRC) dedicated signaling.

Alternatively, step S406 and step S408 may be combined into one step, that is, the macro station may carry the notification message and the received proprietary system message together in a proprietary signaling to send to the UE.

Optionally, after receiving all system information including the public system information and the private system information, the UE may initiate a random access procedure to the selected cell, and further perform data transmission with the cell. Specifically, the method may further include steps S409 to S4010:

s409: the UE initiates a random access procedure.

The UE performs random access with the selected small station according to all system information of the selected small station obtained from the macro station, in particular random access related configuration information.

S4010: and the UE performs data transmission with the small station 1.

After the UE successfully accesses the small station, the UE can perform data transmission with the small station. Alternatively, the small station may be directly connected to the core network, that is, the small station may independently perform data transmission; the small station can also be connected to the macro station, and the data of the small station is transmitted with the core network through the macro station.

Alternatively, as another embodiment of the present invention, when only a single small station, for example, the small station 1, is disposed under the macro station, all the system information of the small station 1 may be broadcast through the macro station.

By adopting the information transmission method provided by the embodiment, the macro station performs public system information broadcasting and special system information forwarding of the small station, so that the reliability of system information transmission is improved, and the air interface resources of the small station are saved.

Fig. 5 is a schematic signaling flow diagram of an information transmission method provided in an embodiment of the present invention, where the method includes steps S501 to S508:

s501: the macro station broadcasts common system information.

S502: and the UE reports the measurement information to the macro station.

S503: and the macro station determines a small station suitable for the UE to access according to the received measurement information.

Steps S501 to S503 can refer to the descriptions of steps S401 to S403 in the embodiment shown in fig. 2, and are not described herein again.

In the embodiment shown in fig. 5, it is still assumed that the small station selected by the macro station for the UE is small station 1.

S504: the macro station transmits an indication message to the small station 1 instructing the small station 1 to broadcast the proprietary system information.

Specifically, the macro station informs the selected small station, i.e. small station 1, of the decision result by means of an indication message, and requests small station 1 to start broadcasting the proprietary system information, including at least the system information which is not broadcasted by the macro station in MIB, SIB1 and SIB 2.

S505: the small station 1 broadcasts proprietary system information.

Specifically, the small station 1 may start broadcasting the proprietary system information after receiving the indication message transmitted by the macro station.

Alternatively, the small station may broadcast the proprietary system information in any one of three ways:

the method includes the steps that firstly, a small station broadcasts a special system message according to a preset broadcasting mode, and a UE receives the special system message according to a preset receiving rule, specifically, the preset broadcasting mode comprises a preset broadcasting period and time frequency resources occupied by the special system message, and the UE can acquire the special system message on the corresponding time frequency resources according to a preset rule.

Secondly, the small station broadcasts the proprietary system message according to the broadcasting mode configured by the macro station, and the macro station informs the UE of the corresponding broadcasting configuration information, so that the small station broadcasts according to the configuration of the macro station, and the UE receives according to the configuration of the macro station. Optionally, the macro station may carry broadcast configuration information in an indication message notifying the selected small station, and carry the broadcast configuration information in a message notifying the UE.

Thirdly, the small station configures the proprietary system message broadcast, informs the macro station of the corresponding broadcast configuration information, and then the macro station forwards the broadcast configuration information to the UE, and the UE receives the broadcast configuration information according to the configuration of the small station. Optionally, the small station may carry the broadcast configuration information in a feedback message sent to the macro station, and the macro station may carry the broadcast configuration information in a decision notification message sent to the UE.

It should be understood that the three broadcast modes are only examples, and the broadcast mode of the small station is not limited in any way in the embodiment of the present invention.

Alternatively, in another embodiment of the present invention, the small station 1 may transmit an ACK to the macro station to confirm receipt of the indication message transmitted by the macro station before broadcasting the proprietary system information.

S506: the macro station transmits a notification message to the UE.

Specifically, the macro station notifies the UE of the decision result by using a notification message, where the notification message may carry identification information of a small station selected by the macro station. After obtaining the identification information of the selected small station, the UE starts to listen to the broadcast information of the small station.

It should be noted that step S504 and step S506 have no fixed execution precedence relationship. The steps may be executed in the above order, or S506 may be executed first, and then S504 may be executed, or the steps may be executed simultaneously, which is not particularly limited in the embodiment of the present invention.

S507: the UE initiates a random access procedure.

S508: and the UE performs data transmission with the small station 1.

Similar to the embodiment shown in fig. 2, after obtaining all system information of the cell, the UE may initiate a random access procedure to the cell and perform data transmission, and the specific procedure may refer to the description related to the embodiment shown in fig. 4, which is not described herein again.

By using the information transmission method provided in this embodiment, in the same scenario as that in the embodiment shown in fig. 4, the small station may perform system information broadcasting according to the UE requirement, that is, when the UE tries to access the small station, the small station performs dedicated system information broadcasting based on the instruction of the macro station, so that the air interface resource of the small station is further saved.

Fig. 6 is a flowchart illustrating another information transmission method according to an embodiment of the present invention.

It can be understood that, in the embodiments shown in fig. 4 and fig. 5, the macro station selects a small station for the UE and then performs random access, and in the embodiment shown in fig. 6, based on a non-contention based random access procedure, the macro station performs configuration of random access, and implements selection of a small station and transmission of system information, and finally implements data transmission between the UE and the selected small station. The method comprises the following steps of S601-S6011:

s601: the macro station broadcasts common system information of the small stations.

S602: and the UE reports the measurement information to the macro station.

S601-S602 may refer to descriptions of S401-S402 in the embodiment shown in fig. 3, which are not described herein again.

In this embodiment, S602 is an optional step. The range of the small station suitable for the UE to access can be determined through the measurement information reported by the UE, namely, at least one candidate small station is determined.

S603: the macro station transmits random access configuration information to the UE.

The random access configuration information may include a PRACH resource indication and an identity of the UE. The PRACH resource indication is used for indicating PRACH resources allocated to the UE, and the PRACH resources are used for the UE to send random access preambles.

The UE Identifier may be a Random Access Radio Network Temporary Identifier (RA-RNTI), or a specific Preamble Identifier (Preamble ID), or a combination of RA-RNTI and Preamble ID, or an International Mobile Subscriber Identity (IMSI), or a Cell Radio Network Temporary Identifier (C-RNTI), and the like.

When the identity of the UE is RA-RNTI, the UE may select the corresponding random access preamble by itself.

Optionally, the macro station may further send, to the small station, related information configured by the macro station for the UE, where the related information at least includes an identifier of the UE. When the small station does not have public PRACH resources, the macro station can also inform the small station of the PRACH resources configured for the UE by the macro station.

S604: the UE transmits dedicated random access preambles to the small station 1 and the small station 2, respectively.

Specifically, the UE sends a dedicated random access preamble to each small station according to configuration information issued by the macro station. It should be noted that, if a plurality of small stations detected by the UE are not synchronized, the UE needs to send the dedicated random access preamble according to different timings of different small stations; if a plurality of small stations are synchronous with each other, the UE only needs to send the special random access preamble according to a time sequence.

Alternatively, the UE may transmit the identity of the UE, which may be an RA-RNTI, at the same time as transmitting the dedicated random access preamble to the small station.

S605: the small station 1 and the small station 2 respectively transmit feedback messages to the macro station.

It can be understood that the timing sequence for the small station 1 and the small station 2 to send the feedback messages shown in fig. 6 is only an illustration, and the sequence for sending the feedback messages is not particularly limited in the embodiment of the present invention.

Wherein the feedback message includes an identifier of the UE.

Specifically, after receiving the dedicated random access Preamble sent by the UE, the small station feeds back to the macro station, where the feedback message at least includes an identifier of the UE, and the identifier of the UE may be Preamble ID, RA-RATI, IMSI, or C-RNTI. Optionally, the macro station may also identify the UE in conjunction with the PRACH resource location.

Optionally, the feedback message may further include information such as a signal strength of a random access preamble received by the cell, a cell load, and the like. Specifically, each small station informs the macro station of the self condition through a feedback message, and the macro station determines the small station suitable for the UE to access according to the information such as the signal strength of the random access preamble, the small station load and the like in the feedback message.

Optionally, the feedback message may also carry system information specific to the small station.

Alternatively, in another embodiment of the present invention, the small station may make a decision according to its own load condition, signal reception strength, and the like, and perform feedback when the load condition or the signal reception strength satisfies a certain condition.

It can be understood that, in the embodiment of the present invention, it is not limited that all the small stations receiving the dedicated random access preamble transmitted by the UE need to perform feedback. The above-mentioned "the small station 1 and the small station 2 send feedback messages to the macro station respectively" is merely an example, and cannot constitute a limitation on the number of small stations performing random access feedback in the embodiment of the present invention.

S606: the macro station determines a small station suitable for the UE to access.

And the macro station judges whether the small station feeds back correctly according to the identifier of the UE, such as preambeld or RA-RNTI, fed back by the small station receiving the special random access preamble, and then selects a proper small station for the UE to access according to the information such as the signal intensity, the load condition and the like fed back by the small station. The macro station can judge whether the content fed back by the small station is related to the target UE according to the Preamble ID, the RA-RNTI or the time-frequency resource position occupied by the feedback message, so as to ensure that the UE fed back by the small station is the same as the UE requested by the macro station.

In the present embodiment it is still assumed that the selected small station is small station 1.

S607: the macro station transmits a notification message to the small station 1.

Specifically, the macro station informs the selected small station of the decision result by using a notification message. Alternatively, if the small station does not feed back the TC-RNTI allocated by the small station for the UE to the macro station, the macro station may inform the TC-RNTI of the UE under the macro station to the small station in a notification message. And the TC-RNTI is distributed for the UE by the small station in the random access process of the small station initiated by the UE.

S608: the small station 1 transmits ACK to the macro station.

Specifically, after receiving the decision notification sent by the macro station, the selected small station sends an ACK to the macro station. Optionally, the system information specific to the selected cell may also be sent to the macro station along with the ACK. That is, after the macro station determines the suitable small station for the UE to access, only the selected small station feeds back its proprietary system information.

Wherein S608 is an optional step.

S609: the macro station transmits a notification message to the UE.

Specifically, the macro station notifies the UE of the decision result by using a notification message, where the notification message includes the specific system information of the selected cell fed back in S605 or S608, and may further include identification information of the cell, a Timing Advance (TA) value allocated by the cell to the UE, and information such as TC-RNTI and uplink Grant information (UL Grant).

It can be understood that if the proprietary system information of the small station 1 is fed back to the macro station in step S605, step S607 is not performed in the order of step S609; if the exclusive system information of the small station 1 is fed back to the macro station in step S608, step S609 follows step S607.

S6010: the UE establishes an RRC connection with the small station 1.

Specifically, the UE may initiate an RRC connection establishment procedure, which establishes an RRC connection between the UE and the selected small station, similar to the RRC connection establishment procedure of the existing macro station. The embodiments of the present invention will not be described in detail herein.

S6011: and the UE performs data transmission with the small station 1.

The data transmission process may refer to the related description of other embodiments of the present invention, and is not described herein again.

Optionally, in another embodiment of the present invention, the macro station may send the special system information of the small station to the UE through a special signaling manner, for example, the macro station sends a signaling carrying the special system information of the small station to the UE separately.

Optionally, in another embodiment of the present invention, the selected small station may send its proprietary system information to the UE by broadcasting. For a detailed description of the broadcasting manner of the small station, reference may be made to the related description of other embodiments of the present invention, which is not described herein again.

By adopting the information transmission method provided by the embodiment, the macro station broadcasts the public system information, the reliability of system information transmission is improved, the macro station initiates and configures a non-competitive random access process between the UE and the small stations, and can select a proper small station for the UE according to the information fed back by the small stations, so that the effective management of wireless resources is realized, and in addition, the small stations selected by the macro station for the UE can broadcast the system information according to the requirements of the UE, so that the air interface resources of the small stations are further saved.

Fig. 7 is a signaling flow diagram of another information transmission method according to an embodiment of the present invention.

According to the above embodiments, the macro station may select at least one small station for the UE to perform data transmission, and may apply beamforming (beamforming) on the small station during the data transmission. In order to implement beamforming, a small station needs to perform channel estimation according to a Sounding Reference Signal (SRS) reported by a UE.

It is assumed that the UE can perform data transmission with the small station 1 and the small station 2 under the coverage of the macro station, respectively. The method comprises steps S701-S706:

s701: the macro station transmits sounding configuration information to the UE.

Specifically, the macro station sends sounding configuration information to the UE, including time-frequency resources occupied by the SRS, sending periods of the SRS, and the like.

Optionally, the macro station may also send sounding configuration information to each small station within the coverage area, for example, the small station 1 and the small station 2 in this embodiment. Specifically, if the small station 1 and the small station 2 are both allocated to the same sounding resource, the macro station does not need to send sounding configuration information sent to the UE to each small station again; if the small station 1 and the small station 2 do not have the same sounding resource, the macro station needs to inform the configuration information to each small station. For example, in the embodiment, the macro station needs to send the sounding configuration information to the small station 1 and the small station 2.

S702: the UE transmits SRS to the small station 1 and the small station 2, respectively.

Specifically, the UE may send the SRS to the small station 1 and the small station 2 at corresponding periods on corresponding time-frequency resources according to sounding configuration information sent by the macro station, in combination with the cell-level parameters and the user-level parameters.

S703: the small station 1 and the small station 2 respectively transmit feedback messages to the macro station.

Specifically, after receiving the SRS sent by the UE, the cell measures RSRQ or RSRP, and carries the measurement result in the feedback message. Optionally, the feedback message may also include load information of the small station, and the like.

It can be understood that, in the embodiment of the present invention, the sequence in which the UE transmits the SRS to the small station 1 and the small station 2, or the sequence in which the small station 1 and the small station 2 transmit the feedback message to the macro station is not particularly limited.

S704: the macro station selects a small station suitable for beamforming.

Specifically, the macro station makes a decision according to the information fed back by the small station 1 and the small station 2, and selects a proper small station for beam forming. The selection method of the small station in the embodiment of the present invention is not particularly limited, and for example, the small station with a high RSRQ or RSRP value and a small load may be selected to perform beamforming. In the embodiment of the present invention, it is assumed that the macro station selects the small station 1.

S705: the macro station transmits a notification message to the small station 1.

Specifically, the macro station makes a decision and then sends a notification message to the selected small station, notifying the small station that the small station can provide a data transmission service for the UE by using beamforming.

S706: the small station 1 performs beamforming.

Specifically, the selected small station estimates channel gain according to the SRS transmitted by the UE, calculates a corresponding weight, loads the weight on each antenna of the small station to form a beam, and transmits data to the UE through the beam. The specific flow of beamforming may refer to any beamforming manner in the prior art, which is not particularly limited in the embodiment of the present invention.

By adopting the information transmission method provided by the embodiment, the macro station realizes sounding configuration between the UE and the small station, and high-reliability transmission of signaling is realized. Meanwhile, the macro station selects a proper small station for the UE to carry out beam forming based on the SRS, and unified resource management is realized.

It is understood that the embodiments shown in fig. 4-7 are further additions and descriptions to the embodiment shown in fig. 3, and the descriptions of the embodiments may be referred to each other.

Fig. 8 is a schematic structural diagram of a first base station 800 according to an embodiment of the present invention.

The first base station 800 includes a broadcasting unit 801, a first transmitting unit 802, and a processing unit 803.

The broadcasting unit 801 is configured to broadcast common system information of at least one base station.

It is to be understood that there is a communication interface between the at least one base station and the first base station 800. The communication interface is a logical interface, and the detailed description of the communication interface may refer to the related contents of other embodiments of the present invention, which is not described herein again.

Wherein the common system information is system information shared by the at least one base station. For the detailed description of the common system information, reference may be made to relevant contents of some embodiments of the method of the present invention, which are not described herein again.

A first sending unit 802, configured to send a notification message that the UE is suitable for accessing the second base station to the second base station, where the second base station belongs to the at least one base station.

A processing unit 803, configured to, in conjunction with the second base station, send a system message specific to the second base station to the UE.

The private system information includes other system information of the second base station than the public system information broadcast by the broadcast unit 801. For detailed description of the proprietary system information, reference may be made to relevant contents of some embodiments of the method of the present invention, which are not described herein again.

Optionally, in this embodiment, the first base station 800 may be a macro station, the at least one base station may be at least one small station within the coverage area of the first base station 800, and the second base station may be one or more small stations of the at least one small station.

Alternatively, the at least one base station may be a neighboring base station of the first base station 800.

Alternatively, the first base station 800 may operate in a low frequency band, and the at least one base station may operate in a high frequency band.

Optionally, in another embodiment of the present invention, the first base station 800 further includes a first receiving unit 804 and a second transmitting unit 805. In this embodiment, the processing unit 803 is specifically configured to instruct the second base station to send the proprietary system information to the first base station 800; the first receiving unit 804 is configured to receive the proprietary system information sent by the second base station; a second sending unit 805 is configured to forward the proprietary system information to the UE.

Optionally, in another embodiment of the present invention, the processing unit 803 is specifically configured to instruct the second base station to broadcast the proprietary system information, so that the UE acquires the proprietary system information according to the broadcast of the second base station.

For the specific process of the first base station 800 and the second base station working together, the detailed description of the embodiment of the method of the present invention may be referred to for the specific process of sending the dedicated system message of the second base station to the UE, which is not repeated herein.

Optionally, as another embodiment of the present invention, the processing unit 803 may further be configured to select a second base station suitable for the UE to access from among the at least one base station. Specifically, in this embodiment, the first base station 800 may include a second receiving unit 806, configured to receive measurement information reported by the UE, where the measurement information indicates the signal reception strength of the at least one base station, and the processing unit 803 may select the second base station from the at least one base station according to the signal reception strength of the at least one base station. For a specific process of how the first base station 800 selects the second base station according to the signal receiving strength, reference may be made to the related description of the method embodiment of the present invention, which is not described herein again.

The first base station broadcasts the public system information of at least one base station, determines a second base station suitable for UE access in the at least one base station, and sends the special system information of the second base station to the UE by combining the second base station; therefore, the system information of the second base station can be effectively transmitted, the reliability of system information transmission is improved, furthermore, the first base station is used as a macro station to broadcast the public system information of a plurality of small stations, the situation that each small station repeatedly broadcasts the same system information can be avoided, and the air interface resources of the small stations are saved.

Optionally, as another embodiment of the present invention, the first sending unit 802 may be further configured to send random access configuration information to the UE, and the UE may send a random access preamble to the at least one base station according to the random access configuration information. The first receiving unit 804 may be further configured to receive a feedback message sent by the at least one base station after receiving the random preamble sequence, where the feedback message includes an identifier of the UE.

Optionally, the feedback message further includes a base station load and a signal strength of the random access preamble sequence.

Optionally, the processing unit 803 may determine the second base station according to the base station load fed back by the at least one base station and the signal strength of the random access preamble.

For the specific processes of the first base station 800 performing the random access configuration and determining the second base station, reference may be made to some embodiments of the method of the present invention, for example, detailed descriptions of the embodiment shown in fig. 6, which are not repeated herein.

In this embodiment, a non-contention random access procedure between the UE and at least one base station including the second base station is initiated and configured by the first base station 800, and a base station suitable for access can be selected for the UE according to information fed back by the at least one base station, so as to implement effective management of radio resources.

It can be understood that the first base station 800 may be configured to execute the technical solution of the method embodiment shown in fig. 3, and participate in executing the technical solutions of the method embodiments shown in fig. 4 to fig. 7 as a macro station, which has similar implementation principles and technical effects, and is not described herein again.

It should be noted that, in terms of hardware implementation, the broadcasting unit 801, the first sending unit 802, and the second sending unit 805 may be a transmitter or a transceiver. The first receiving unit 804 and the second receiving unit 806 may be receivers or transceivers. The processing unit 802 may be embedded in a hardware form or a processor independent from the base station, or may be stored in a memory of the base station in a software form, so that the processor can call and execute operations corresponding to the above respective modules. The processor may be a Central Processing Unit (CPU), a microprocessor, a single chip, or the like.

Fig. 9 is a schematic structural diagram of a second base station 900 according to an embodiment of the present invention.

The second base station 900 comprises a receiving unit 901 and a processing unit 902.

A receiving unit 901, configured to receive a notification message that a UE is suitable for accessing a base station and sent by a first base station, where the second base station 900 belongs to at least one base station, and common system information of the at least one base station is broadcast by the first base station.

For specific description of the first base station broadcasting the public system information of the at least one base station, reference may be made to relevant contents of other embodiments of the present invention, which are not described herein again.

A processing unit 902, configured to send, in conjunction with the first base station, a system message specific to the second base station to the UE.

For detailed description of the proprietary system information, reference may be made to relevant contents of some embodiments of the method of the present invention, which are not described herein again.

Alternatively, the first base station may be a macro station, the at least one base station may be at least one small station within the coverage of the macro station, and the second base station 900 may be one small station of the at least one small station.

Optionally, the first base station may operate in a low frequency band, and the at least one base station may operate in a high frequency band.

Optionally, in an embodiment of the present invention, the second base station 900 further includes a sending unit 903. In this embodiment, the processing unit 902 is configured to instruct, according to the indication of the first base station, the sending unit 903 to send the dedicated system information to the first base station, so that the first base station forwards the dedicated system information to the UE.

Optionally, in an embodiment of the present invention, the second base station 900 further includes a broadcasting unit 904. In this embodiment, the processing unit 902 is configured to instruct the broadcasting unit 904 to broadcast the proprietary system information according to the indication of the first base station.

For the specific process of the second base station 900 working in conjunction with the first base station, and sending the dedicated system message of the second base station 900 to the UE, the detailed description of the embodiment of the method of the present invention may be referred to, and is not repeated herein.

The second base station provided by the embodiment of the invention is used as the base station which is determined by the first base station and is suitable for the UE to access, and the special system information of the second base station is sent to the UE by combining the first base station, so that the system information of the second base station can be effectively transmitted, and the reliability of system information transmission is improved.

It can be understood that the second base station 900 may be a small station, which participates in executing the technical solutions of the method embodiments shown in fig. 4 to fig. 7, and the implementation principles and technical effects thereof are similar, and are not described herein again.

It should be noted that, in terms of hardware implementation, the receiving unit 901 may be a receiver or a transceiver; the sending unit 903, the broadcasting unit 904 may be a transmitter or a transceiver. The processing unit 902 may be embedded in a hardware form or a processor independent from the base station, or may be stored in a memory of the base station in a software form, so that the processor can call and execute operations corresponding to the above modules. The processor can be a CPU, a microprocessor, a singlechip and the like.

Fig. 10 is a schematic structural diagram of a UE1000 according to an embodiment of the present invention.

The UE includes a receiving unit 1001 and an obtaining unit 1002.

A receiving unit 1001, configured to receive common system information of the second base station broadcasted by the first base station, where the second base station is a second base station determined by the first base station for the UE and suitable for the UE to access.

The first base station may be a macro station, and the second base station may be a small station; alternatively, the first base station and the second base station are neighboring base stations.

Alternatively, the first base station may operate in a low frequency band and the second base station may operate in a high frequency band.

An obtaining unit 1002, configured to obtain the proprietary system information of the second base station.

The process of acquiring the dedicated system information by the UE and the specific content of the dedicated system information may refer to the related descriptions of other embodiments of the present invention, which are not described herein again.

Optionally, as an embodiment of the present invention, the UE1000 further includes a sending unit 1003, configured to report measurement information to the first base station, where the measurement information indicates a signal reception strength, so that the first base station determines, according to the measurement information, whether the second base station is suitable for the UE to access.

Optionally, the UE1000 further includes a processing unit 1004, configured to detect a synchronization signal of the second base station, and calculate a signal reception strength of the second base station according to the synchronization signal.

For the specific process of reporting the measurement information to the first base station by the UE1000, reference may be made to relevant contents in other embodiments of the present invention, which are not described herein again.

It should be noted that, in terms of hardware implementation, the functions of receiving unit 1001 and obtaining unit 1002 may be performed by one receiver, that is, receiving unit 1001 and obtaining unit 1002 may be located in the same receiver or transceiver. The processing unit 1004 can be embedded in a hardware form or a processor independent from the base station, and can also be stored in a memory of the base station in a software form, so that the processor can call and execute operations corresponding to the above modules. The processor can be a CPU, a microprocessor, a singlechip and the like.

The UE provided by the embodiment of the invention receives the public system information of the second base station broadcast by the first base station and the special system information of the second base station forwarded by the first base station or broadcast by the second base station, and the reliability of system information transmission is high.

Fig. 11 is a schematic structural diagram of a first base station 1100 according to an embodiment of the present invention.

The first base station 1100 comprises a first transmitter 1101, a second transmitter 1102, a processor 1103.

A first transmitter 1101 for broadcasting common system information of at least one base station.

It will be appreciated that there is a communication interface between the at least one base station and the first base station 1100. The communication interface is a logical interface, and the detailed description of the communication interface may refer to the related contents of other embodiments of the present invention, which is not described herein again.

A second transmitter 1102, configured to send a notification message that the UE is suitable for accessing the second base station to the second base station, where the second base station belongs to the at least one base station.

Wherein the proprietary system information includes other system information of the second base station than the public system information broadcast by the first transmitter 1101. For detailed description of the proprietary system information, reference may be made to relevant contents of some embodiments of the method of the present invention, which are not described herein again.

A processor 1103 configured to, in conjunction with the second base station, send a system message specific to the second base station to the UE.

The processor 1103 may be a multi-core processor, or may be a processor that is dispersed in geographical locations and connected by a communication link, or may be a CPU, or may be a Digital Signal Processor (DSP) or other special processor, which is not particularly limited in this embodiment of the present invention. In practical applications, the processor 1103 may be integrated in a Base Band Unit (BBU) of the base station.

It is to be understood that in this embodiment, the first base station 1100 may be a macro station, the at least one base station may be at least one small station within the coverage area of the first base station 1100, and the second base station may be one or more small stations of the at least one small station.

Alternatively, the at least one base station may be a neighboring base station of the first base station 1100.

Alternatively, the first base station 1100 may operate in a low frequency band, and the at least one base station may operate in a high frequency band.

Optionally, in another embodiment of the present invention, the first base station 1100 further includes a first receiver 1104. In this embodiment, the processor 1103 is specifically configured to instruct the second base station to send the proprietary system information to the first base station 1100; the first receiver 1104 is used for receiving the proprietary system information sent by the second base station; the first transmitter 1101 may also be used to forward the proprietary system information to the UE.

Optionally, in another embodiment of the present invention, the processor 1103 is specifically configured to instruct the second base station to broadcast the proprietary system information, so that the UE acquires the proprietary system information according to the broadcast of the second base station.

For the specific process of the first base station 1100 and the second base station working together, the detailed description of the embodiment of the method of the present invention may be referred to for the specific process of sending the dedicated system message of the second base station to the UE, which is not repeated herein.

Optionally, as another embodiment of the present invention, the processor 1103 may be further configured to select, from the at least one base station, a second base station suitable for the UE to access. Specifically, in this embodiment, the first base station 1100 may include a second receiver 1105, configured to receive measurement information reported by the UE, where the measurement information indicates the signal reception strength of the at least one base station, and the processor 1103 may select the second base station from the at least one base station according to the signal reception strength of the at least one base station. For a specific process of how the first base station 1100 selects the second base station according to the signal reception strength, reference may be made to the related description of the method embodiment of the present invention, which is not repeated herein.

It is to be understood that the first transmitter 1101 and the second transmitter 1102 described in the embodiment of the present invention may be two independent transmitting devices, where the first base station 1100 transmits information or data to a terminal device such as a UE using the first transmitter 1101, and the first base station 1100 transmits information or data to another base station having a communication interface with the first base station 1100 using the second transmitter 1102. Similarly, first receiver 1104 and second receiver 1105 may be separate two receiving devices. Wherein the second receiver 1105 may be integrated with the first transmitter 1101 in the same transceiver; the first receiver 1104 may be integrated with the second transmitter 1102 in the same transceiver. In practical applications, the transceiver may be located in a radio frequency part of a base station, such as a Radio Remote Unit (RRU).

The first base station provided in the embodiment of the present invention broadcasts the public system information of at least one base station, determines a second base station suitable for UE access in the at least one base station, and sends the proprietary system information of the second base station to the UE in combination with the second base station, so that the system information of the second base station can be effectively transmitted, and the reliability of system information transmission is improved.

Optionally, as another embodiment of the present invention, the second transmitter 1102 may be configured to transmit random access configuration information to the UE, and the UE may transmit a random access preamble to the at least one base station according to the random access configuration information. The first receiver 1104 may be further configured to receive a feedback message sent by the at least one base station after receiving the random preamble sequence, where the feedback message includes an identifier of the UE.

Alternatively, the processor 1103 may determine the second base station according to the base station load fed back by the at least one base station and the signal strength of the random access preamble.

For the specific process of performing the random access configuration by the first base station 1100 and determining the second base station, reference may be made to some embodiments of the method of the present invention, for example, detailed descriptions of the embodiment shown in fig. 6, which are not repeated herein.

In this embodiment, a non-contention random access procedure between the UE and at least one base station including the second base station is initiated and configured by the base station 1101, and a base station suitable for access can be selected for the UE according to information fed back by the at least one base station, so as to implement effective management of radio resources.

It can be understood that the first base station 1100 may be configured to execute the technical solution of the method embodiment shown in fig. 3, and participate in executing the technical solutions of the method embodiments shown in fig. 4 to fig. 7 as a macro station, and the implementation principle and the technical effect are similar, and are not described herein again.

Further, the first base station 1100 further comprises an antenna 1106 for transmitting or receiving signals.

Further, the first base station 1100 may further include a memory 1107, wherein the memory 1107 is coupled to the processor 1103 and stores program instructions and data necessary for the base station.

The other parts of the base station include, but are not limited to, for example, a power supply unit, or a transmission part, or an alarm part, or an operation and maintenance part, and those skilled in the art can understand that the base station may have different components according to different implementations, which is not limited in this embodiment.

The first transmitter 1101, the second transmitter 1102, the processor 1103, the first receiver 1104, and the second receiver 1105 may be connected by a communication bus 1108. The communication bus may be a local bus.

Fig. 12 is a schematic structural diagram of a second base station 1200 according to an embodiment of the present invention.

The base station comprises a receiver 1201 and a processor 1202.

A receiver 1201, configured to receive a notification message sent by a first base station that a UE is suitable for accessing the base station, where the base station belongs to at least one base station, and common system information of the at least one base station is broadcasted by the first base station.

A processor 1202 for sending, in conjunction with the first base station, a system-specific message of the base station to the UE.

The processor 1202 may be a multi-core processor, or may be a processor dispersed in a geographical location and connected by a communication link, or may be a CPU, or may be a DSP or other special processor, which is not particularly limited in this embodiment of the present invention. In practical applications, the processor 1202 may be integrated within the BBU of the base station.

Alternatively, the first base station may be a macro station, the at least one base station may be at least one small station within the coverage of the macro station, and the second base station 1200 belongs to the at least one small station.

Alternatively, the second base station 1200 may be a neighboring base station of the first base station.

Optionally, in an embodiment of the present invention, the second base station 1200 further comprises a first transmitter 1203. In this embodiment, the processor 1202 is configured to instruct the first transmitter 1203 to transmit the proprietary system information to the first base station according to the indication of the first base station. The first base station may forward the proprietary system information to the UE.

Optionally, in an embodiment of the present invention, the second base station 1200 further includes a second transmitter 1204. In this embodiment, the processor 1202 is configured to instruct the second transmitter 1204 to broadcast the proprietary system information in accordance with the indication of the first base station.

For the specific process of the second base station 1200 and the first base station working together, the detailed description of the embodiment of the method of the present invention may be referred to for the specific process of sending the dedicated system message of the second base station 1200 to the UE, which is not repeated herein.

It can be understood that the receiver 1201 described in this embodiment of the present invention may be independent of a receiving device in the second base station 1200, which receives information or data of a terminal device such as a UE, and is specifically configured to receive information or data transmitted by another base station having a communication interface with the second base station 1200; the first transmitter 1203 and the second transmitter 1204 may be two independent transmitting devices, where the second base station 1200 uses the first transmitter 1203 to transmit information or data to another base station having a communication interface with the second base station 1200, and the second base station 1200 uses the second transmitter 1204 to transmit information or data to a terminal device such as a UE.

It can be understood that the second base station 1200 may be a small station, and participate in executing the technical solutions of the method embodiments shown in fig. 4 to fig. 7, and the implementation principles and technical effects thereof are similar, and are not described herein again.

Further, the second base station 1200 also comprises an antenna 1205 for transmitting or receiving signals.

Further included in the second base station 1200 is a memory 1206, the memory 1206 being configured to couple to the processor 1202 and to store program instructions and data necessary for the base station.

The receiver 1201, the processor 1202, the first transmitter 1203, the second transmitter 1204 may be connected by a communication bus 1106. The communication bus may be a local bus.

Fig. 13 is a schematic diagram of a communication system according to an embodiment of the present invention. The communication system includes a first base station 1301 and a second base station 1302.

In this communication system, a communication interface exists between a first base station 1301 and a second base station 1302.

The first base station 1301 may be a macro station, and the second base station 1302 may be a small station within a coverage area of the macro station; or the second base station 1302 may be a neighboring base station of the first base station 1301.

The first base station 1301 may operate in a low frequency band, and the second base station 1302 may operate in a high frequency band.

A first base station 1301 for broadcasting common system information of at least one base station; sending a notification message to the second base station 1302 that the UE is suitable for accessing the second base station; wherein the second base station 1302 belongs to the at least one base station.

The second base station 1302 is configured to receive a notification message sent by the first base station 1301 that the UE is suitable for accessing the second base station 1302.

The first base station 1301, in conjunction with the second base station 1302, sends a proprietary system message of the second base station 1302 to the UE.

Optionally, the first base station 1301, in conjunction with the second base station 1302, sending the proprietary system message of the second base station 1302 to the UE includes that the first base station 1301 instructs the second base station 1302 to send the proprietary system message to the first base station 1301; the second base station 1302 sends the proprietary system information to the first base station 1301 according to the instruction of the first base station 1301; the first base station 1301 forwards the acquired proprietary system information to the UE.

Optionally, the first base station 1301 and the second base station 1302 are combined, sending the proprietary system message of the second base station 1302 to the UE includes that the first base station 1301 instructs the second base station 1302 to broadcast the proprietary system information, and the second base station 1302 broadcasts the proprietary system information according to the instruction of the first base station 1301.

For the specific process of sending the dedicated system message of the second base station 1302 to the UE, the detailed description of the embodiment of the method of the present invention may be referred to, and is not repeated herein.

Optionally, as another embodiment of the present invention, the first base station 1301 may select a second base station suitable for UE access from the at least one base station. Specifically, the first base station 1301 receives measurement information reported by the UE, where the measurement information indicates the signal reception strength of the at least one base station, and selects the second base station 1302 in the at least one base station according to the signal reception strength of the at least one base station. For a specific process of how the first base station 1301 selects the second base station 1302 according to the signal receiving strength, reference may be made to the related description of the method embodiment of the present invention, which is not described herein again.

The communication system provided by the embodiment of the invention comprises a first base station and a second base station selected by the first base station for UE to access, wherein the first base station broadcasts public system information of at least one base station including the second base station, and the second base station is combined to send the special system information of the second base station to the UE, so that the system information of the second base station can be effectively transmitted, the reliability of system information transmission is improved, furthermore, under the scene of common networking of a macro station and a plurality of small stations, the first base station serving as the macro station broadcasts public system information of the plurality of small stations, the situation that each small station repeatedly broadcasts the same system information can be avoided, and the air interface resources of the small stations are saved.

Optionally, as another embodiment of the present invention, the first base station 1301 may send random access configuration information to the UE, and the UE may send a random access preamble to the at least one base station according to the random access configuration information. The first base station 1301 may also be configured to receive a feedback message sent by the at least one base station after receiving the random preamble sequence, where the feedback message includes an identifier of the UE.

Optionally, the first base station 1301 may determine the second base station 1302 according to a base station load fed back by the at least one base station and a signal strength of the random access preamble.

For the specific processes of performing the random access configuration by the first base station 1301 and determining the second base station 1302, reference may be made to some embodiments of the method of the present invention, for example, detailed descriptions of the embodiment shown in fig. 6, which are not described herein again.

In this embodiment, a non-contention random access procedure between the UE and at least one base station including the second base station 1302 is initiated and configured by the first base station 1301, and a base station suitable for access can be selected for the UE according to information fed back by the at least one base station, so as to implement effective management of radio resources.

It can be understood that the first base station 1301 in the communication system provided in the embodiment of the present invention may be a base station in the embodiment shown in fig. 8 or fig. 11, and the second base station 1302 may be a base station in the embodiment shown in fig. 9 or fig. 12, and for detailed description of each device in the communication system, reference may be made to relevant contents of other embodiments of the present invention, which is not described herein again.

It is to be understood that "communication" or "communication bus" described in the embodiments of the present invention may be direct communication or indirect communication; the communication can also be logical communication or physical wiring communication; the communication may be point-to-point communication or communication using a bus, which is not limited in this embodiment of the present invention.

It will be clear to those skilled in the art that the embodiments of the present invention are mutually referred to. For convenience and simplicity of description, the above-described device, the specific working process of the module or unit in the device, and the working process of the communication system including the above-described device may refer to the corresponding process descriptions in the foregoing method embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways without departing from the scope of the application. For example, the above-described base station embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Additionally, the systems, devices, and methods described, as well as the illustrations of various embodiments, may be combined or integrated with other systems, modules, techniques, or methods without departing from the scope of the present application. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of the base station or unit through some interfaces, and may be in an electronic, mechanical or other form.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An information transmission method, characterized in that the method comprises,

the first base station broadcasts the public system information of at least one base station;

the first base station sends a notification message that User Equipment (UE) is suitable for accessing a second base station to the second base station, wherein the second base station belongs to the at least one base station;

and the first base station and the second base station are combined, and the first base station sends the proprietary system message of the second base station to the UE.

2. The method of claim 1, further comprising,

the first base station sends random access configuration information to the UE, so that the UE sends a random access preamble to the at least one base station;

and the first base station receives a feedback message sent by the at least one base station after receiving the random leader sequence, wherein the feedback message comprises the identifier of the UE.

3. The method of claim 2, wherein the feedback message further comprises a base station load and a signal strength of the random access preamble sequence.

4. The method of claim 3,

and the first base station determines the second base station according to the base station load fed back by the at least one base station and the signal strength of the random access preamble.

5. The method of any of claims 1-4, wherein the first base station, in conjunction with the second base station, sends a system message specific to the second base station to the UE, comprising,

the first base station instructing the second base station to send the proprietary system information to the first base station;

and the first base station receives the proprietary system information and forwards the proprietary system information to the UE.

6. The method of any of claims 1-4, wherein the first base station, in conjunction with the second base station, sends a system message specific to the second base station to the UE, comprising,

and the first base station instructs the second base station to broadcast the proprietary system information, so that the UE acquires the proprietary system information according to the broadcast of the second base station.

7. An information transmission method, characterized in that it has all the features of the method of any one of claims 1 to 6 and,

the first base station operates in a low frequency band and the at least one base station operates in a high frequency band.

8. An information transmission method, characterized in that it has all the features of the method of any one of claims 1 to 7 and,

the common system information is system information common to the at least one base station.

9. An information transmission method, characterized in that the method comprises,

a second base station receives a notification message which is sent by a first base station and is suitable for a User Equipment (UE) to access the second base station;

the second base station is combined with the first base station to send a proprietary system message of the second base station to the UE;

wherein the base station belongs to at least one base station, and the common system information of the at least one base station is broadcasted by the first base station.

10. The method of claim 9, wherein the second base station, in conjunction with the first base station, sends a system message specific to the second base station to the UE, comprising,

and the second base station sends the proprietary system information to the first base station according to the indication of the first base station, so that the first base station forwards the proprietary system information to the UE.

11. The method of claim 9, wherein the first base station, in conjunction with the second base station, sends a system message specific to the second base station to the UE, comprising,

and the second base station broadcasts the proprietary system information according to the indication of the first base station.

12. The method according to any one of claims 9 to 11,

13. A first base station, characterized in that the first base station comprises,

a broadcasting unit for broadcasting common system information of at least one base station;

a first sending unit, configured to send, to a second base station, a notification message that a user equipment UE is suitable for accessing the second base station, where the second base station belongs to the at least one base station;

and the processing unit is used for combining the second base station and sending the proprietary system message of the second base station to the UE.

14. The first base station of claim 13, further comprising a second transmitting unit,

the second sending unit is configured to send random access configuration information to the UE, so that the UE sends a random access preamble to the at least one base station;

the first base station further includes a first receiving unit, configured to receive a feedback message sent by the at least one base station after receiving the random preamble sequence, where the feedback message includes an identifier of the UE.

15. The first base station as claimed in claim 14, wherein the feedback message further includes a base station load and a signal strength of the random access preamble sequence.

16. The first base station according to claim 15, characterized in that the processing unit is specifically configured to,

and determining the second base station according to the base station load fed back by the at least one base station and the signal strength of the random access preamble.

17. The first base station according to any of claims 13 to 16, wherein said processing unit is specifically configured to,

instructing the second base station to send the proprietary system information to the first base station;

the first base station further comprises a first receiving unit for receiving the proprietary system information;

the first base station further comprises a second sending unit for forwarding the proprietary system information to the UE.

18. The first base station according to any of claims 13 to 16, wherein said processing unit is specifically configured to,

and instructing the second base station to broadcast the proprietary system information, so that the UE acquires the proprietary system information according to the broadcast of the second base station.

19. A first base station, characterized in that it has all the features of the first base station of any of claims 13 to 18 and,

20. A first base station, characterized in that it has all the features of the first base station of any of claims 13 to 18 and,

21. A second base station, comprising,

a receiving unit, configured to receive a notification message sent by a first base station that a UE is suitable for accessing a second base station;

a processing unit, configured to send, in conjunction with the first base station, a system message specific to the second base station to the UE;

wherein the second base station belongs to at least one base station, and the common system information of the at least one base station is broadcasted by the first base station.

22. The second base station of claim 21, further comprising a transmitting unit,

the processing unit is configured to instruct, according to the indication of the first base station, the sending unit to send the proprietary system information to the first base station, so that the first base station forwards the proprietary system information to the UE.

23. The second base station of claim 21, further comprising a broadcast unit,

the processing unit is used for indicating the broadcasting unit to broadcast the proprietary system information according to the indication of the first base station.

24. The second base station according to any of claims 21-23,

25. A storage medium, characterized in that the storage medium stores a computer program which, when executed by a computer device, is capable of implementing the method of any one of claims 1-8.

26. A storage medium, characterized in that the storage medium stores a computer program which, when executed by a computer device, is capable of implementing the method of any one of claims 9-12.