WO2017091988A1 - Information transmission method, base station and communication system - Google Patents

Abstract

Provided are an information transmission method, a base station and a communication system. The information transmission method comprises: a first base station broadcasting public system information about at least one base station, wherein a communication interface exists between the at least one base station and the first base station; and the first base station determining a second base station suitable for the access of a user equipment (UE) from among the at least one base station, and cooperating with the second base station to send, to the UE, a proprietary system message of the second base station, so that system information can be effectively transmitted. Furthermore, a first base station serving as a macro station broadcasts public system information about a plurality of small stations, various small stations can be prevented from repeatedly broadcasting the same system information, and air interface resources of the small stations are saved.

Description

Information transmission method, base station and communication system Technical field

The embodiments of the present invention relate to the field of wireless communications, and in particular, to an information transmission method, a base station, and a communication system.

Background technique

With the continuous development of mobile broadband services, the currently used low-frequency resources can no longer meet the user's business needs. Since high-frequency resources are richer and have higher bandwidth than low-frequency resources, developing high-frequency resources has become an important research field for improving user throughput.

In the evolution system of the fourth generation (4th generation, 4G) communication system, a networking manner in which a low frequency macro station and a high frequency small station are jointly networked can be adopted. Specifically, a plurality of high-frequency small stations can be deployed in the coverage of a low-frequency macro station, and the high-frequency small station supplements and strengthens the signal coverage of the low-frequency macro station, and the user equipment is in the coverage of the high-frequency small station. (user equipment, UE) can receive system information broadcast by the high frequency station. However, the use of small station broadcast system information, system information transmission efficiency is low.

Summary of the invention

Embodiments of the present invention provide 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: a first base station broadcasts public system information of the at least one base station; and the first base station sends, to the second base station, a UE that is suitable for accessing the second a notification message of the base station, the second base station belongs to the at least one base station; the first base station, in conjunction with the second base station, sends a proprietary system message of the second base station to the UE.

In a possible implementation manner, the first base station is a macro station, the at least one base station is at least one small station in a macro station coverage area, and the second base station is the first base station from the at least one The small station selected in the small station.

According to the information transmission method provided by the embodiment of the present invention, the first base station broadcasts the common system information of the at least one base station, and the second base station sends the proprietary system information of the second base station to the UE, and can effectively transmit the system information of the second base station. .

In a 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; The base station receives the feedback message that is sent by the at least one base station after receiving the random preamble sequence, where the feedback message includes 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, 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 a signal strength of the random access preamble.

The first base station initiates and configures a non-contention random access procedure between the UE and the at least one base station, and can select an appropriate second base station for the UE according to the information fed back by the at least one base station, so as to implement effective management of the radio resources.

In a possible implementation manner, the first base station, in conjunction with the second base station, sends a proprietary system message of the second base station to the UE, where the first base station indicates that the second base station The proprietary system information is sent to the first base station; the first base station receives the proprietary system information and forwards the information to the UE.

The reliability of the system information transmission is improved by the first base station broadcasting the common system information of the second base station and forwarding the proprietary system information of the second base station to the UE. Further, by broadcasting the public system message of the multiple small stations as the first base station of the macro station, it is possible to prevent the small stations from repeatedly broadcasting the same system information, thereby saving the air interface resources of the small station.

In a possible implementation manner, the first base station, in conjunction with the second base station, sends a proprietary system message of the second base station to the UE, where the second base station is configured according to the first base station. Instructing to broadcast the proprietary system information. Then, the small station can broadcast the proprietary system information according to the macro station instruction, which saves the air interface resources of the small station.

In a second aspect, the embodiment of the present invention provides an information transmission method, where the second base station receives a notification message that the UE sent by the first base station is suitable for accessing the second base station, and the second base station is associated with the first base station. Sending, to the UE, a proprietary system message of the second 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 broadcast by the first base station.

In a possible implementation manner, the first base station is a macro station, the at least one base station is at least one small station in a macro station coverage area, and the second base station is the first base station from the at least one The small station selected in the small station.

In a possible implementation manner, the second base station, in conjunction with the first base station, sends a proprietary system message of the second base station to the UE, where the second base station is configured according to the first base station Instructing to transmit the proprietary system information to the first base station such that the first base station forwards the proprietary system information to the UE.

In a possible implementation manner, the first base station, in conjunction with the second base station, sends a proprietary system message of the second base station to the UE, where the second base station is configured according to the first base station. Instructing to broadcast the proprietary system information.

With the information transmission method provided by the embodiment of the present invention, the second base station and the first base station send the proprietary system information of the second base station to the UE, which can effectively transmit the system information of the small station and improve the reliability of system information transmission.

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

In a possible implementation, the structure of the base station includes a processor, a first transmitter, and a second transmitter, where the first transmitter is configured to broadcast common system information of the at least one base station, the at least one base station There is a communication interface with the first base station. And a second transmitter, configured to send, to the second base station, a notification message that the UE is suitable for accessing the second base station, where the second base station belongs to the at least one base station. a processor configured to associate with the second base station to send the location to the UE A proprietary system message of the second base station.

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

In a possible implementation, the structure of the base station includes a receiver and a processor, where the receiver is configured to receive a notification message that the UE sent by the first base station is suitable for accessing the base station, The base station belongs to at least one base station having a communication interface with the first base station. The processor is configured to, in conjunction with the first base station, send a proprietary system 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 according to the third aspect and the base station according to 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 perform 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 perform the above aspects.

The technical solution provided by the embodiment of the present invention can effectively transmit system information of the base station to the UE, and save the air interface resources of the base station.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work.

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

2 is a schematic diagram of another application scenario according to an embodiment of the present invention;

FIG. 3 is a schematic flowchart diagram of an information transmission method according to an embodiment of the present disclosure;

FIG. 4 is a schematic flowchart diagram of an information transmission method according to an embodiment of the present disclosure;

FIG. 5 is a schematic flowchart diagram of an information transmission method according to an embodiment of the present disclosure;

FIG. 6 is a schematic flowchart diagram of an information transmission method according to an embodiment of the present disclosure;

FIG. 7 is a schematic flowchart diagram of an information transmission method according to an embodiment of the present disclosure;

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

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

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

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

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

FIG. 13 is a schematic diagram of a communication system according to an embodiment of the present invention.

detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

The techniques described herein can be used in a variety of 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 (Code Division Multiple) Access, CDMA) system, Time Division Multiple Access (TDMA) system, Wideband Code Division Multiple Access Wireless (WCDMA), Frequency Division Multiple Addressing (FDMA) system, positive Orthogonal Frequency-Division Multiple Access (OFDMA) system, single carrier FDMA (SC-FDMA) system, General Packet Radio Service (GPRS) system, Long Term Evolution (LTE) The system and the communication system of the LTE subsequent evolution system, or other similar communication systems.

The macro station according to the embodiment of the present invention may be a base station (Base Transceiver Station, BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station (NodeB or eNB or e in LTE). -NodeB, evolutional Node B), or a similar base station device in a LTE subsequently evolved communication system.

The small stations involved in the embodiments of the present invention include, but are not limited to, the following: a micro base station, a pico base station, and a femto base station, and an access point (AP). The embodiment of the present invention does not limit this.

In the embodiment of the present invention, the communication system is equivalent to the concept of the communication network. 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 is unified in the embodiment of the present invention. The communication system is used for explanation.

The UE involved in the present invention may include a handheld device having a wireless communication function, an in-vehicle device, a wearable device, a computing device, or other processing device connected to a wireless modem, and various forms of user equipment, a mobile station (mobile station, MS), terminal, terminal equipment, etc., for convenience of description, in the present application, simply referred to as user equipment or UE.

The embodiment of the present invention defines that the unidirectional communication link of the base station to the UE is a downlink, and the unidirectional communication link of the UE to the base station is an uplink.

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

It should be understood that the term "and/or" herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

The solution provided by the embodiment of the present invention can be applied to multiple networking scenarios, such as a macro station and a small station. The communication network, or the communication network formed by the macro station and the macro station, is not specifically limited in this embodiment of the present invention. It can be understood that each base station in each of the above network scenarios may be of the same type or a heterogeneous type. For example, in a scenario where a macro station and a small station are connected, the macro station and the small station may both be base stations of the LTE system. Or the macro station is a base station of the LTE system, and the small station is a base station of the LTE subsequent evolution system, such as a small station using a fifth generation (5th generation, 5G) communication technology; for example, in a scenario where a macro station and a macro station are networked. The two macro stations may each be an eNB, or a macro station employing 5G communication technology, and the two macro stations are neighboring base stations.

The system information in the embodiment of the present invention may include various types of system information used in the LTE system, and includes various types of system information used in the 5G system. The embodiment of the present invention does not limit the type of the system message. The public system information in the embodiment of the present invention refers to system information shared by two or more base stations, that is, the type, content, or value of the system information are the same; the proprietary system information refers to system information that is only adapted to a certain base station, that is, Each base station has system information of the same type but with different information content or values. Therefore, the public system information and the proprietary system information are relatively speaking. Taking the scenes of the macro station and the small station network as an example, the system information of each station may include basic waveform parameters, if the basic waveform of each station If the values of the parameters are the same, the basic waveform parameters can be used as common system information; if the values of the basic waveform parameters of the 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 of the macro station, for example, in a scenario where the macro station and the small station are co-located, the public system information and the proprietary system information of the small station may not be distinguished, and all systems of the small station are not included. Messages can be broadcast by the macro station.

FIG. 1 is a schematic diagram of two application scenarios applicable to the embodiment of the present invention.

In the communication network shown in FIG. 1, a macro station is included, and four independent stations, including a small station 1, a small station 2, a small station 4, are deployed in a coverage area of the macro station. As shown in FIG. 1, the coverage areas of the small stations may not overlap each other; the coverage areas of any two small stations may also have overlapping portions, such as the small station 1 and the small station 4 shown in FIG.

In the communication network shown in FIG. 2, the macro station and the small station can be co-located, that is, the macro station and the small station are arranged on the same site.

It can be understood that the coverage area of the above macro station or small station refers to the spatial range that the 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, the coverage area of the macro station is referred to as a macro cell, which is used to satisfy the mobility and seamless coverage of the UE; the small station is responsible for the coverage of the macro station and is responsible for the specificity in the macro cell. User data transfer within the area, such as blind spots or edge areas. The smaller hotspot area in the macro cell covered by the small station is called a small cell/micro cell.

After the UE enters the macro cell, it can access the macro station and establish a control plane at the macro station. When there is downlink service data to be transmitted, it may be sent to the UE through the macro station, or may be sent to the UE through a suitable small station. Among them, the macro station can work in the low frequency band, and the small station can work in the high frequency band. Due to the diffractive and diffractive ability of the high frequency band signal, it is easily interfered, and the path loss is serious during the propagation process, and the information transmission reliability is poor.

FIG. 3 is a schematic flowchart diagram of an information transmission method according to an embodiment of the present invention. The method includes steps S301-S303:

S301: The first base station broadcasts public system information of the at least one base station.

It can be understood 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 the communication interface may use an existing communication interface between the base stations, or may be a newly established communication. interface. The communication interface may be fixed, similar to the X2 interface between the eNBs in the LTE system, or may be triggered by an event. The present invention does not specifically limit this. After the initial establishment of the communication interface, any one of the first base station and 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 mode of a copper cable, a microwave, an optical fiber, or the like, which is not specifically limited in the embodiment of the present invention.

Optionally, the coverage area of the at least one base station may be in a coverage area of the first base station; or the coverage area of the at least one base station may partially overlap the coverage area of the first base station; or The coverage area of the at least one base station is independent of the coverage area of the base station, that is, the portion where the two do not overlap.

Optionally, the first base station may be a macro station, and the at least one base station may be at least one small station deployed in 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.

The public 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, and a Public Land Mobile Network (PLMN) identifier, and may also include when the at least one base station is a small station. The information of the basic waveform parameters of the small station is not particularly limited in the embodiment of the present invention.

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

The UE has accessed the first base station, and a control plane is established at the first base station.

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

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

S303: The first base station joins the second base station, and sends a proprietary system message of the second base station to the UE.

The proprietary system information includes other system information configured by the second base station other than the public system information broadcasted in S301, and includes at least a Master Information Block (MIB) and a System Information Block Type (System Information Block Type). 1, SIB1), system information block type 2 (SIB2) system information that is not broadcast by the macro station, such as physical HARQ indicator channel (PHICH) configuration, system frame number, antenna configuration And other information.

Optionally, the first base station, in conjunction with the second base station, sends a proprietary system message of the second base station to the UE, where the first base station instructs the second base station to use the proprietary System Information is sent to the first base station; the first base station receives the proprietary system information and forwards the information to the UE.

Optionally, the first base station, in conjunction with the second base station, sends a proprietary system message of the second base station to the UE, where the first base station instructs the second base station to broadcast the proprietary System information, the UE acquiring the proprietary system information 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 frequency band of the embodiment of the present invention may be, for example, a frequency band of 3.5 GHz (megahertz), 5.2 GHz, 5.6 GHz, and 5.8 GHz.

According to the information transmission method provided by the embodiment of the present invention, the first base station broadcasts common system information of at least one base station, and the first base station determines, in the at least one base station, a second base station that is suitable for UE access, and associates with the second base station to The UE transmits the proprietary system information of the second base station, so that the system information of the second base station can be effectively transmitted; further, in the scenario where the macro station and the plurality of small stations are jointly set up, the first base station that is the macro station broadcasts more The public system messages of a small station can avoid the repeated broadcast of the same system information by each small station and save the air interface resources of the small station.

FIG. 4 is a schematic diagram of a signaling flow 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, wherein the small station 1 and the small station 2 and the macro station respectively have communication. interface.

It can be understood that the small station 1 and the small station 2 are only examples, and cannot impose any restrictions on the number of small stations. In the actual scenario, a single station or multiple stations can be set under one macro station.

The method includes steps S401-S4010:

S401: The macro station broadcasts public system information.

The public system information is system information shared by the small station 1 and the small station 2, and may include, for example, information such as a frequency point, a bandwidth, and a PLMN identity.

The public system information can be stored in a macro station.

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

Before the UE accesses the small station, it needs to implement downlink synchronization with each small station. Optionally, the UE may directly synchronize to the small station; or may synchronize with the macro station, and then synchronize to the small station according to the time slot relationship between the macro station and the small station, and the embodiment of the present invention does not perform the downlink synchronization method. Specially limited.

Alternatively, in order to achieve downlink synchronization with the UE, each small station can maintain an external broadcast synchronization signal. The UE detects the synchronization time of each small station, performs downlink time-frequency synchronization with the small station that receives the synchronization signal, determines the length of the Cyclic Prefix (CP), acquires the physical cell identifier, and determines the duplex mode of the system (FDD/ TDD). The UE can calculate the signal receiving strength of the small station by using the detected synchronization signals of the plurality of small stations, and form the measurement information to report to the macro station. Optionally, the synchronization signal may include a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) in the LTE, or may be other types of synchronization signals in the 5G system, in the embodiment of the present invention. This is not specifically limited.

Optionally, when the UE has been synchronized to the small station, the macro station may first locate the UE in the coverage of a certain small station, and then configure a dedicated reference signal for the UE on the located small station, and the UE uses the acquisition. The dedicated reference signal is obtained, and the signal receiving strength of the small station is calculated, and the measurement information is formed and reported to the macro station. Optionally, the dedicated reference signal may be configured by the macro station and sent to the UE by means of 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 may be 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), and Received Signal Strength Indication (RSSI).

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

Specifically, the macro station receives the measurement information reported by the UE, for example, the RSSI of each small station, and selects a suitable small station access for the UE according to the measurement information, that is, completes the decision process. Alternatively, the macro station may consider the load condition of the small station in addition to the signal reception strength indicated by the measurement information. Among them, the macro station can pass the small station The information exchanges to obtain the load status of the small station, and the interaction information may include the transmission network layer load, the hardware load, the 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 can determine at least one small station suitable for UE access, that is, the UE can access at least one small station. In the embodiment of the present invention, the small station 1 is selected as the selected small station. It is for illustrative purposes only and does not constitute any limitation on the number of stations selected by the macro station.

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

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

Specifically, after the macro station completes the decision process, the decision result may be notified to the selected small station by requesting the message, and the selected small station is requested for its proprietary system information for forwarding to the UE.

Optionally, after the selected small station receives the indication message, the method may further include the step S405: the small station 1 sends an acknowledgement message (Acknowledgement, ACK) to the macro station. If the macro station does not receive the acknowledgment message, the above indication message may be sent again after a period of time.

Alternatively, as an embodiment of the present invention, the macro station may request updated proprietary system information for the selected station. Specifically, since there is a communication interface between the macro station and the small station, system information interaction has been performed after the initial establishment of the communication interface. Therefore, when there is a UE requesting access to the small station, the macro station does not need to request all the proprietary system information from the selected small station, and only needs to request the updated partial proprietary system information. Further, the proprietary system information can be divided into two categories, one is static proprietary system information, and the proprietary system information is not changed for a long time, such as antenna configuration, and the macro station can interact with the initial system information. Get this information. The other type is dynamic proprietary system information, which is periodically or non-periodically changed, such as the system frame number, and the macro station needs to request such system information from the selected station.

S406: The macro station sends a notification message to the UE.

Specifically, the macro station notifies the UE of the result of the decision by using the notification message, and the notification message may be carried in the notification message. The identification information of the selected small station of the macro station.

It should be noted that there is no fixed execution relationship between step S404 and step S406. The method may be performed in the above-mentioned order, or S406 may be performed first, and then S404 may be executed, or two steps may be performed at the same time, which is not specifically limited in the embodiment of the present invention.

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

After receiving the above indication message, the selected station may send all system information except the public system information broadcast by the macro station in S401 to the macro station.

Optionally, 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 spontaneously to the macro station when the proprietary system information changes. Send updated proprietary system information.

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

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

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

Optionally, after receiving all the system information including the public system information and the proprietary system information, the UE may initiate a random access procedure to the selected small station to perform data transmission with the small station. Specifically, the method may further include steps S409-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: The UE performs data transmission with the small station 1.

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

Alternatively, as another embodiment of the present invention, when only a single small station, such as the small station 1, is set under the macro station, all system information of the small station 1 can be completely broadcast by the macro station.

With the information transmission method provided by the embodiment, the macro station performs the public system information broadcast of the small station and the proprietary system information forwarding, thereby improving the reliability of the system information transmission and saving the small station air interface resources.

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

S501: The macro station broadcasts public system information.

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

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

For the steps S501-S503, reference may be made to the description of steps S401-S403 in the embodiment shown in FIG. 2, and details are not described herein.

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

S504: The macro station sends an indication message to the small station 1 to instruct the small station 1 to broadcast the proprietary system information.

Specifically, the macro station notifies the selected small station, that is, the small station 1, by means of the indication message, and requests the small station 1 to start broadcasting the proprietary system information, including at least the MIB, the SIB1, and the SIB2 are not performed by the macro station. Broadcast system information.

S505: The small station 1 broadcasts proprietary system information.

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

Alternatively, the small station can broadcast proprietary system information in any of the following three ways:

First, the small station broadcasts the proprietary system message according to the preset broadcast mode, and the UE receives the data according to the preset receiving rule. Specifically, the preset broadcast mode includes the preset broadcast period and the time when the preset proprietary system information is occupied. For the frequency resource, the UE may acquire the proprietary system information on the corresponding time-frequency resource according to a preset rule.

Second, the small station broadcasts the proprietary system message according to the broadcast mode configured by the macro station, and the macro station will correspondingly The broadcast configuration information informs the UE that the small station broadcasts according to the configuration of the macro station, and the UE performs reception according to the configuration of the macro station. Optionally, the macro station may carry the broadcast configuration information in the indication message notifying the selected small station, and carry the broadcast configuration information in the message notifying the UE.

Third, the small station configures the proprietary system message broadcast, and 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 performs the reception 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 is to be understood that the above three broadcast modes are merely illustrative. The embodiment of the present invention does not limit the broadcast mode of the small station.

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

S506: The macro station sends a notification message to the UE.

Specifically, the macro station notifies the UE of the result of the decision by using the notification message, and the notification message may carry the identifier information of the 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 there is no fixed execution relationship between step S504 and step S506. It can be executed in the above-mentioned order, and S506 can be executed first, and then S504 can be executed, or can be performed at the same time, which is not specifically limited in the embodiment of the present invention.

S507: The UE initiates a random access procedure.

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

Similar to the embodiment shown in FIG. 2, after the UE obtains all the system information of the small station, the random access process may be initiated to the small station and the data transmission may be performed. For the specific process, refer to the related description of the embodiment shown in FIG. Do not repeat them.

With the information transmission method provided in this embodiment, in the same scenario as the embodiment shown in FIG. 4, the small station can perform system information broadcast according to the requirements of the UE, that is, when the UE attempts to access the small station, the small station is based on the macro. The station's instructions to broadcast proprietary system information further saves the air interface resources of the station.

FIG. 6 is a schematic flowchart diagram of another information transmission method according to an embodiment of the present invention.

It can be understood that the foregoing embodiment shown in FIG. 4 and FIG. 5 performs random access after the macro station selects a small station for the UE. In the embodiment shown in FIG. 6, the non-contention based random access procedure is performed by a macro. The station performs the configuration of random access, and realizes the selection of the small station and the transmission of the system information, and finally realizes the data transmission between the UE and the selected small station. The method includes steps S601-S6011:

S601: Public system information of the macro station broadcasting station.

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

S601-S602 may refer to the description of S401-S402 in the embodiment shown in FIG. 3, and details are not described herein.

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

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

The random access configuration information may include a PRACH resource indication and an identifier of the UE. The PRACH resource indication is used to indicate a PRACH resource allocated to the UE, and the PRACH resource is used by the UE to send a random access preamble.

The identifier of the UE may be a Random Access Radio Network Temporary Identifier (RA-RNTI), or a specific Preamble Identity (Preamble Identity), or an RA-RNTI and a Preamble ID. The combination may be an International Mobile Subscriber Identity (IMSI), or a Cell Radio Network Temporary Identity (C-RNTI), etc., and the type of the identifier of the UE is not used in the embodiment of the present invention. Specially limited.

When the identifier of the UE is the RA-RNTI, the corresponding random access preamble can be selected by the UE itself.

Optionally, the macro station may further send, to the small station, related information that is configured by the macro station for the UE, where the related information includes at least the identifier of the UE. When the small station does not have a common PRACH resource, the macro station may also inform the small station of the PRACH resource configured by the macro station.

S604: The UE sends a dedicated random access preamble 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 the configuration information sent by the macro station. It should be noted that if the multiple 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 multiple small stations are synchronized with each other, At this time, the UE only needs to send the dedicated random access preamble according to one timing.

Optionally, the UE may send the identifier of the UE while sending the dedicated random access preamble to the small station, where the identifier of the UE may be an RA-RNTI.

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

It can be understood that the sequence of sending the feedback message by the small station 1 and the small station 2 shown in FIG. 6 is only a schematic diagram, and the sequence of sending the feedback message is not particularly limited in the embodiment of the present invention.

The feedback message includes an identifier of the UE.

Specifically, after receiving the dedicated random access preamble sent by the UE, the small station sends feedback to the macro station, where the feedback message includes at least the identifier of the UE, and the identifier of the UE may be a Preamble ID or an RA-RATI or an IMSI or a C- Information such as 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 the random access preamble received by the small station, a small station load, and the like. Specifically, each small station informs the macro station of its own situation through a feedback message, and the macro station determines a small station suitable for UE access according to information such as the signal strength of the random access preamble in the feedback message, the load of the small station, and the like.

Optionally, the feedback message may also carry the proprietary system information of the small station.

Optionally, 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 only when the load condition or the signal reception strength satisfies certain conditions.

It can be understood that, in the embodiment of the present invention, all the small stations that receive the dedicated random access preamble sent by the UE are not required to perform feedback. The above-mentioned "small station 1 and small station 2 respectively send feedback messages to the macro station" is merely an example, and cannot constitute the number of small stations that perform random access feedback in the embodiment of the present invention.

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

The macro station determines whether the small station feedback is correct according to the identifier of the UE, such as the Preamble ID or the RA-RNTI, which is received by the small station that receives the dedicated random access preamble, and then according to the signal strength and load information fed back by the small station. Select a suitable small station access for the UE. The macro station may determine whether the content fed back by the small station is related to the target UE according to the time-frequency resource location occupied by the Preamble ID, the RA-RNTI, or the feedback message, to ensure that the UE fed back by the small station and the UE requested by the macro station are the same.

It is still assumed in the embodiment of the invention that the selected station is the station 1.

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

Specifically, the macro station uses the notification message to inform the selected station of the decision result. Optionally, if the small station does not feed back the TC-RNTI allocated by the small station to the UE, the macro station may inform the small station of the TC-RNTI of the UE under the macro station in the notification message. The TC-RNTI is a UE in the random access process of initiating the small station, and the small station is allocated to the UE.

S608: The small station 1 sends an ACK to the macro station.

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

Among them, S608 is an optional step.

S609: The macro station sends a notification message to the UE.

Specifically, the macro station notifies the UE of the decision result by using the notification message, where the notification message includes the proprietary system information of the selected small station fed back in S605 or S608, and may further include the identification information of the small station, the The timing of the timing advance (TA) assigned by the small station 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, the steps S607 and S609 are not performed in the order of execution; if the proprietary system information of the small station 1 is in step S608 If the medium is forwarded to the macro station, 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 setup process, and the UE establishes an RRC connection with the selected small station, which is similar to the RRC connection establishment process of the existing macro station. This embodiment of the present invention does not describe this.

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

For the data transmission process, reference may be made to related descriptions of other embodiments of the present invention, and details are not described herein.

Optionally, in another embodiment of the present invention, the macro station may send the proprietary system information of the small station to the UE by using a dedicated signaling manner, for example, the macro station separately sends a proprietary system carrying the small station to the UE. Signaling of information.

Alternatively, in another embodiment of the invention, the selected station may broadcast its proprietary system information to the UE by broadcast. For a detailed description of the broadcast mode of the small station, reference may be made to the related description of other embodiments of the present invention, and details are not described herein.

With the information transmission method provided by the embodiment, the macro station broadcasts the public system information, and improves the reliability of the system information transmission. The macro station initiates and configures the non-contention random access process of the UE and the small station, and can be based on the information fed back by the small station. The UE selects a suitable small station to implement effective management of radio resources. In addition, the small station selected by the macro station for the UE can broadcast system information according to the UE requirements, thereby further saving the air interface resources of the small station.

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

According to the above embodiment, the macro station may select at least one small station for data transmission for the UE, and beamforming may be applied to the small station during data transmission. To implement beamforming, the small station needs to perform channel estimation according to the sounding reference signal (SRS) reported by the UE.

It is assumed that the UE can perform data transmission with the small station 1 and the small station 2 covered by the macro station, respectively. The method includes steps S701-S706:

S701: The macro station sends sounding configuration information to the UE.

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

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

S702: The UE sends the 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 in a corresponding period according to the sounding configuration information sent by the macro station, combined with the cell level parameter and the user level parameter, on the corresponding time frequency resource.

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

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

It can be understood that the sequence in which the UE sends the SRS to the small station 1 and the small station 2 in the embodiment of the present invention, or the sequence in which the small station 1 and the small station 2 send 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 based on the information fed back by the small station 1 and the small station 2, and selects a suitable small station for beamforming. The manner of selecting a small station in the embodiment of the present invention is not particularly limited. For example, a small station with a high RSRQ or RSRP value and a small load may be selected for beamforming. In the embodiment of the present invention, it is assumed that the macro station selects the station 1.

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

Specifically, after the macro station makes a decision, it sends a notification message to the selected small station, informing the small station that the data transmission service can be provided to the UE by using beamforming.

S706: The small station 1 performs beamforming.

Specifically, the selected small station estimates the channel gain according to the SRS sent by the UE, calculates a corresponding weight, loads it onto each antenna of the small station, forms a beam, and transmits data to the UE through the beam. For a specific process of beamforming, reference may be made to any one of the beamforming methods in the prior art. No special restrictions.

With the information transmission method provided in this embodiment, the macro station implements the sounding configuration between the UE and the small station, and implements high-reliability transmission of signaling. At the same time, the macro station selects a suitable small station for the UE to perform beamforming based on the SRS, and realizes unified management of resources.

It can be understood that the embodiments shown in FIG. 4-7 are further supplements and descriptions to the embodiment shown in FIG. 3. The contents described in the embodiments can 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 broadcast unit 801 is configured to broadcast public system information of at least one base station.

It can 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. For a detailed description of the communication interface, reference may be made to related content of other embodiments of the present invention, and details are not described herein.

The public system information is system information shared by the at least one base station. For a detailed description of the public system information, reference may be made to the related content of some embodiments of the method of the present invention, and details are not described herein.

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

The processing unit 803 is configured to send, according to the second base station, a proprietary system message of the second base station to the UE.

The proprietary system information includes other system information of the second base station other than the public system information broadcast by the broadcast unit 801. For a detailed description of the proprietary system information, reference may be made to the related content of some embodiments of the method of the present invention, and details are not described herein.

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

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

Alternatively, the first base station 800 can operate in a low frequency band, and the at least one base station can 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 sending 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; and the first receiving unit 804 is configured to receive the Proprietary system information; 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 according to the broadcast of the second base station. Proprietary system information.

For a specific process of the first base station 800 working in conjunction with the second base station and transmitting the proprietary system message of the second base station to the UE, refer to the detailed description of some embodiments of the method of the present invention, and no further details are provided herein.

Optionally, as another embodiment of the present invention, the processing unit 803 is further configured to select, in the at least one base station, a second base station that is suitable for UE access. 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 a signal receiving strength of the at least one base station, and the processing unit 803 may Selecting the second base station among the at least one base station according to a 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 some embodiments of the method of the present invention, and details are not described herein.

The first base station provided by the embodiment of the present invention broadcasts common system information of at least one base station, and determines, in the at least one base station, a second base station that is suitable for UE access, and the second base station sends the second base station to the UE. System information; thus, the system information of the second base station can be effectively transmitted, and the reliability of system information transmission is improved, and further, the first base station serves as a macro station to broadcast a plurality of small stations. The common system message can avoid the repeated broadcast of the same system information by each small station and save the air interface resources of the small station.

Optionally, as another embodiment of the present invention, the first sending unit 802 is further configured to send random access configuration information to the UE, where the UE may send the random access configuration information to the at least one base station according to the random access configuration information. Send random access preamble. The first receiving unit 804 is further configured to receive a feedback message that is 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 a specific process of performing the random access configuration by the first base station 800 and determining the second base station, reference may be made to the embodiment of the method of the present invention, such as the detailed description of the embodiment shown in FIG. 6, which is not described herein.

In this embodiment, the first base station 800 initiates and configures a non-contention random access procedure of the UE and at least one base station including the second base station, and can select a suitable connection for the UE according to the information fed back by the at least one base station. The incoming base station implements effective management of radio resources.

It can be understood that the first base station 800 can be used to implement the technical solution of the method embodiment shown in FIG. 3, and the macro station participates in the technical solution of the method embodiment shown in FIG. , will not repeat them here.

It should be noted that, in hardware implementation, the broadcast unit 801, the first sending unit 802, and the second sending unit 805 may be transmitters or transceivers. The first receiving unit 804 and the second receiving unit 806 can be a receiver or a transceiver. The processing unit 802 may be embedded in the hardware of the base station in hardware or may be stored in the memory of the base station in software, so that the processor invokes the operations corresponding to the above modules. The processor can be a central processing unit (CPU), a microprocessor, a single chip microcomputer, 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 includes a receiving unit 901, and a processing unit 902.

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

For a detailed description of the public system information of the at least one base station, the related content of the other embodiments of the present invention may be referred to, and details are not described herein.

The processing unit 902 is configured to send the proprietary system message of the second base station to the UE in conjunction with the first base station.

For a detailed description of the proprietary system information, reference may be made to the related content of some embodiments of the method of the present invention, and details are not described herein.

Optionally, 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 of the at least one small station. .

Optionally, the at least one base station may be a neighboring base station of the first base 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: according to the indication of the first base station, instruct the sending unit 903 to send the proprietary system information to the first base station, so that the first base station System information is forwarded 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 broadcast unit 904 to broadcast the proprietary system information according to the indication of the first base station.

For a specific process of the second base station 900 working in conjunction with the first base station and transmitting the proprietary system message of the second base station 900 to the UE, reference may be made to the detailed description of some embodiments of the method of the present invention, and details are not described herein.

The second base station provided by the embodiment of the present invention, as the base station suitable for the UE access determined by the first base station, sends the second base station's proprietary system information to the UE, and can effectively transmit the system information of the second base station. Improve the reliability of system information transmission.

It can be understood that the second base station 900 can be used as a small station to participate in the technical solution of the method embodiment shown in FIG. 4, and the implementation principle and technical effects are similar, and details are not described herein again.

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

FIG. 10 is a schematic structural diagram of a UE 1000 according to an embodiment of the present invention.

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

The receiving unit 1001 is configured to receive public system information of the second base station that is broadcast by the first base station, where the second base station is a second that is determined by the first base station to be suitable for the UE to be accessed by the UE. Base station.

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

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

The obtaining unit 1002 acquires the proprietary system information of the second base station.

For a specific description of the process of the UE acquiring the proprietary system information and the specific system information, refer to the related description of other embodiments of the present invention, and no further details are provided herein.

Optionally, as an embodiment of the present invention, the UE 1000 further includes a sending unit 1003, configured to report measurement information to the first base station, where the measured information indicates a received strength, so that the first base station is configured according to the Determining measurement information, determining whether the second base station is suitable for the UE access.

Optionally, the UE 1000 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 the UE 1000 reporting the measurement information to the first base station, reference may be made to related content in other embodiments of the present invention, and details are not described herein.

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

The UE provided by the embodiment of the present invention receives the public system information of the second base station broadcasted by the first base station, and the proprietary system information of the second base station that is forwarded by the first base station or broadcast by the second base station, and the reliability of the 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 includes a first transmitter 1101, a second transmitter 1102, and a processor 1103.

The first transmitter 1101 is configured to broadcast public system information of at least one base station.

It can be understood 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. For a detailed description of the communication interface, reference may be made to related content of other embodiments of the present invention, and details are not described herein.

The public system information is system information shared by the at least one base station. For a detailed description of the public system information, reference may be made to the related content of some embodiments of the method of the present invention, and details are not described herein.

The second transmitter 1102 is configured to send, to the second base station, a notification message that the user equipment UE is suitable to access the second base station, where the second base station belongs to the at least one base station.

The proprietary system information includes other system information of the second base station other than the public system information broadcast by the first transmitter 1101. For a detailed description of the proprietary system information, reference may be made to the related content of some embodiments of the method of the present invention, and details are not described herein.

The processor 1103 is configured to, in conjunction with the second base station, send a proprietary system message of the second base station to the UE.

The processor 1103 may be a multi-core processor, or may be a processor that is geographically dispersed and connected by a communication link, and may be a CPU, a digital signal processor (DSP), or the like. The special processor is not specifically limited in this embodiment of the present invention. In a practical application, the processor 1103 can be integrated in a baseband unit (BBU) of the base station.

It can be understood that, in this implementation manner, the first base station 1100 can be a macro station, the at least one base station can be at least one small station within the coverage of the first base station 1100, and the second base station can be one of the at least one small station. Or multiple small stations.

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

Alternatively, the first base station 1100 can operate in a low frequency band, and the at least one base station can 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 configured to receive the Proprietary system information; the first transmitter 1101 can also be configured 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 according to a broadcast of the second base station. Proprietary system information.

For a specific process of the first base station 1100 working in conjunction with the second base station and transmitting the proprietary system message of the second base station to the UE, refer to the detailed description of some embodiments of the method of the present invention, and no further details are provided herein.

Optionally, as another embodiment of the present invention, the processor 1103 is further configured to select, in the at least one base station, a second base station that is suitable for UE 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 a signal receiving strength of the at least one base station, and the processor 1103 may Selecting the second base station among the at least one base station according to a 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 some embodiments of the method of the present invention, and details are not described herein.

It can be understood that the first transmitter 1101 and the second transmitter 1102 in the embodiment of the present invention may be two independent transmitting devices, where the first base station 1100 uses the first transmitter 1101 to send information to a terminal device such as a UE. Alternatively, the first base station 1100 uses the second transmitter 1102 to transmit information or data to other base stations that have a communication interface with the first base station 1100. Similarly, the first receiver 1104 and the second receiver 1105 can be two separate receiving devices. The second receiver 1105 can be integrated with the first transmitter 1101 in the same transceiver; the first receiver 1104 can be integrated with the second transmitter 1102 in the same transceiver. In practical applications, the above transceiver may be located in a radio frequency part of the base station, such as a radio remote unit (RRU).

The first base station provided by the embodiment of the present invention broadcasts common system information of at least one base station, and determines, in the at least one base station, a second base station that is suitable for UE access, and the second base station sends the second base station to the UE. System information, thereby being able to effectively transmit system information of the second base station, and improving the reliability of system information transmission. Further, the first base station serves as a macro station to broadcast public system messages of multiple small stations, thereby avoiding repetition of each small station. Broadcast the same system information and save the air interface resources of small stations.

Optionally, as another embodiment of the present invention, the second transmitter 1102 may be configured to send random access configuration information to the UE, where the UE may send the information according to the random access configuration information to the One less base station sends a random access preamble. The first receiver 1104 may be further configured to receive a feedback message that is 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 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 a 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 the embodiment of the method of the present invention, such as the detailed description of the embodiment shown in FIG. 6, which is not described herein.

In this embodiment, the base station 1101 initiates and configures a non-contention random access procedure of the UE and at least one base station including the second base station, and can select a suitable access for the UE according to the information fed back by the at least one base station. The base station implements effective management of radio resources.

It can be understood that the first base station 1100 can be used to implement the technical solution of the method embodiment shown in FIG. 3, and as a macro station, participate in the technical solution of the method embodiment shown in FIG. , will not repeat them here.

Further, the first base station 1100 further includes an antenna 1106 for transmitting or receiving a signal.

Further, the first base station 1100 may further include a memory 1107, and the memory 1107 is configured to be coupled to the processor 1103 to store necessary program instructions and data of the base station.

The other parts of the base station include, but are not limited to, a power supply unit, or a transmission part, or an alarm part, or an operation and maintenance part. It can be understood by those skilled in the art that the base station can have different components according to different implementation manners. This embodiment does not limit this.

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 can 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 includes a receiver 1201 and a processor 1202.

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

For a detailed description of the public system information of the at least one base station, the related content of the other embodiments of the present invention may be referred to, and details are not described herein.

The processor 1202 is configured to, in conjunction with the first base station, send a proprietary system message of the base station to the UE.

The processor 1202 may be a multi-core processor, or may be a processor that is geographically dispersed and connected by a communication link, and may be a CPU, or may be a DSP or other special processor. No special restrictions. In a practical application, the processor 1202 can be integrated in the BBU of the base station.

For a detailed description of the proprietary system information, reference may be made to the related content of some embodiments of the method of the present invention, and details are not described herein.

Optionally, 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.

Optionally, the second base station 1200 may be a neighboring base station of the first base 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 1200 further includes a first transmitter 1203. In this embodiment, the processor 1202 is configured to instruct the first transmitter 1203 to send 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 according to the indication of the first base station.

For a specific process of the second base station 1200 working in conjunction with the first base station and transmitting the proprietary system message of the second base station 1200 to the UE, reference may be made to the detailed description of some embodiments of the method of the present invention, and details are not described herein.

It can be understood that the receiver 1201 described in the embodiment of the present invention can be used to receive other base stations having a communication interface with the second base station 1200, independently of the receiving device that receives information or data of the terminal device such as the UE in the second base station 1200. The first transmitter 1203 and the second transmitter 1204 may be two independent transmitting devices, wherein the second base station 1200 uses the first transmitter 1203 to connect to other base stations having a communication interface with the second base station 1200. The second base station 1200 transmits information or data to the terminal device such as the UE by using the second transmitter 1204.

The second base station provided by the embodiment of the present invention, as the base station suitable for the UE access determined by the first base station, sends the second base station's proprietary system information to the UE, and can effectively transmit the system information of the second base station. Improve the reliability of system information transmission.

It can be understood that the second base station 1200 can be used as a small station to participate in the technical solution of the method embodiment shown in FIG. 4, and the implementation principle and technical effects are similar, and details are not described herein again.

Further, the second base station 1200 further includes an antenna 1205 for transmitting or receiving a signal.

Further, the second base station 1200 further includes a memory 1206, and the memory 1206 is configured to be coupled to the processor 1202 to store necessary program instructions and data of the base station.

The other parts of the base station include, but are not limited to, a power supply unit, or a transmission part, or an alarm part, or an operation and maintenance part. It can be understood by those skilled in the art that the base station can have different components according to different implementation manners. This embodiment does not limit this.

The receiver 1201, the processor 1202, the first transmitter 1203, and the second transmitter 1204 may be connected by a communication bus 1106. The communication bus can 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 the communication system, a communication interface exists between the first base station 1301 and the second base station 1302.

The first base station 1301 may be a macro station, the second base station 1302 may be a small station within the coverage 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 can operate in a low frequency band, and the second base station 1302 can operate in a high frequency band.

The first base station 1301 is configured to broadcast common system information of the at least one base station; and send, to the second base station 1302, a notification message 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 that the UE sent by the first base station 1301 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 and the second base station 1302 send the proprietary system message of the second base station 1302 to the UE, where the first base station 1301 instructs the second base station 1302 to use the proprietary The system information is sent 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 indication of the first base station 1301; the first base station 1301 will obtain the used proprietary system information. Forward to the UE.

Optionally, the first base station 1301 and the second base station 1302 send the proprietary system message of the second base station 1302 to the UE, where the first base station 1301 instructs the second base station 1302 to broadcast the proprietary System information, the second base station 1302 broadcasts the proprietary system information according to the indication of the first base station 1301.

For a specific process of the first base station 1301 working in conjunction with the second base station 1302 and transmitting the proprietary system message of the second base station 1302, refer to the detailed description of some embodiments of the method of the present invention, and no further details are provided herein.

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

The communication system provided by the embodiment of the present invention includes a first base station and a second base station that the first base station selects to access the UE, and the first base station broadcasts public system information of the at least one base station including the second base station, and associates with the first The second base station sends the proprietary system information of the second base station to the UE, so that the system information of the second base station can be effectively transmitted, and the reliability of the system information transmission is improved, and further, the macro station and the plurality of small stations are jointly networked. In the scenario, the first base station that is a macro station broadcasts the public system messages of multiple small stations, so that each small station can be prevented from repeatedly broadcasting the same system information, thereby saving the air interface resources of the small stations.

Optionally, as another embodiment of the present invention, the first base station 1301 may send random access configuration information to the UE, where the UE may send random access to the at least one base station according to the random access configuration information. Leading. The first base station 1301 is further configured to receive a feedback message that is 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 first base station 1301 may determine the second base station 1302 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 a specific process of performing the random access configuration by the first base station 1301 and determining the second base station 1302, reference may be made to a part of the method of the present invention, such as the detailed description of the embodiment shown in FIG. 6, which is not described herein.

In this embodiment, the first base station 1301 initiates and configures a non-contention random access procedure of the UE and at least one base station including the second base station 1302, and can select a suitable UE according to the information fed back by the at least one base station. The base station is connected to implement effective management of radio resources.

It can be understood that the first base station 1301 in the communication system provided by the embodiment of the present invention may be the base station in the embodiment shown in FIG. 8 or FIG. 11, and the second base station 1302 may be the base station in the embodiment shown in FIG. 9 or FIG. For a detailed description of each device in the communication system, reference may be made to related content of other embodiments of the present invention, and details are not described herein.

It can be understood that the “communication” or “communication bus” in the embodiments of the present invention may be direct communication or indirect communication; it may also be logical communication or physical connection communication; it may also be point-to-point communication, or communication by bus The embodiment of the present invention does not limit this.

It will be apparent to those skilled in the art that various embodiments of the present invention may be referred to each other. For the convenience and brevity of the description, the device described above, the specific working process of the module or unit in the device, and the working process of the communication system including the device described above may be referred to the corresponding process description in the foregoing method embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a A computer device (which may be a personal computer, server, or network device, etc.) performs all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, 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 the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners without departing from the scope of the present application. For example, the base station embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed. Among the above The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without any creative effort.

In addition, the described systems, devices, and methods, and the schematic diagrams 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 mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, base station or unit, and may be in electronic, mechanical or other form.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims (24)

An information transmission method, characterized in that the method comprises The first base station broadcasts public system information of at least one base station; Sending, by the first base station, a notification message that the user equipment UE is suitable to access the second base station, where the second base station belongs to the at least one base station; The first base station, in conjunction with the second base station, sends a proprietary system message of the second base station to the UE. The method of claim 1 wherein said method further comprises 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; The first base station receives a feedback message that is sent by the at least one base station after receiving the random preamble sequence, where the feedback message includes an identifier of the UE. The method according to claim 2, wherein the feedback message further comprises: a base station load, and a signal strength of the random access preamble sequence. The method of claim 3 wherein: 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 a signal strength of the random access preamble. The method according to any one of claims 1-4, wherein the first base station and the second base station send a proprietary system message of the second base station to the UE, including, The first base station instructs the second base station to send the proprietary system information to the first base station; The first base station receives the proprietary system information and forwards the information to the UE. The method according to any one of claims 1-4, wherein the first base station and the second base station send a proprietary system message of the second base station to the UE, including, 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. A method according to any one of claims 1 to 6, wherein The first base station operates in a low frequency band, and the at least one base station operates in a high frequency band. A method according to any one of claims 1-7, wherein The public system information is system information shared by the at least one base station. An information transmission method, characterized in that the method comprises Receiving, by the second base station, a notification message that the user equipment UE that is sent by the first base station is suitable for accessing the second base station; The second base station, in conjunction with the first base station, sends a proprietary system message of the second base station to the UE; The base station 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. The method according to claim 9, wherein the second base station, in conjunction with the first base station, sends a proprietary system message of the second base station to the UE, including, And transmitting, by the second base station, 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. The method according to claim 9, wherein the first base station and the second base station send a proprietary system message of the second base station to the UE, including, The second base station broadcasts the proprietary system information according to an indication by the first base station. A method according to any of claims 9-11, characterized in that The first base station operates in a low frequency band, and the at least one base station operates in a high frequency band. A first base station, wherein the first base station includes a broadcast unit, configured to broadcast public system information of at least one base station; a first sending unit, configured to send, to the second base station, a notification message that the 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 a processing unit, configured to send, by the second base station, a proprietary system message of the second base station to the UE. The first base station according to 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 that is sent by the at least one base station after receiving the random preamble sequence, where the feedback message includes an identifier of the UE. The first base station according to claim 14, wherein the feedback message further comprises: a base station load, and a signal strength of the random access preamble sequence. The first base station according to claim 15, wherein the processing unit is specifically configured to: Determining the second base station according to a base station load fed back by the at least one base station and a signal strength of the random access preamble. The first base station according to any one of claims 13-16, wherein the 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 includes a first receiving unit, configured to receive the proprietary system information; The first base station further includes a second sending unit, configured to forward the proprietary system information to the UE. The first base station according to any one of claims 13-16, wherein the processing unit is specifically configured to: Instructing the second base station to broadcast the proprietary system information, so that the UE acquires the proprietary system information according to a broadcast of the second base station. A first base station according to any of claims 13-18, characterized in that The first base station operates in a low frequency band, and the at least one base station operates in a high frequency band. A first base station according to any of claims 13-19, characterized in that The public system information is system information shared by the at least one base station. A second base station, characterized in that a receiving unit, configured to receive, by the first base station, a notification message that the user equipment UE is suitable for accessing the second base station; a processing unit, configured to send, by the first base station, a proprietary system message of the second base station to the UE; The second base station 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. The second base station according to claim 21, further comprising a transmitting unit, The processing unit is configured to: according to the indication of the first base station, instruct 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. The second base station according to claim 21, further comprising a broadcast unit, The processing unit is configured to instruct the broadcast unit to broadcast the proprietary system information according to an indication of the first base station. A second base station according to any of claims 21-23, characterized in that The first base station operates in a low frequency band, and the at least one base station operates in a high frequency band.

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