WO2012119541A1 - Method, system, base station, and ue for transmitting and receiving control information - Google Patents

Abstract

Disclosed are a method, system, base station, and UE for transmitting and receiving control information, to solve the problem in technical solutions of the prior art of low effectiveness and reliability of control information provided by an interfered cell to a UE. The system comprises: a first base station, a UE, and a second base station. The first base station is used to determine control information to be transmitted to the UE, and to transmit the control information to the second base station. The second base station is used to receive the control information transmitted by the first base station and to transmit the control information to the UE.

Description

 Method for transmitting and receiving control information, system and base station, terminal The application is submitted to the Chinese Patent Office on March 8, 2011, and the application number is 201110054940.5, and the invention name is "the transmission and reception method of control information, the system and the base station, and the terminal. The priority of the Chinese Patent Application, the entire contents of which is incorporated herein by reference. The present invention relates to the field of wireless communication technologies, and in particular, to a method and system for transmitting and receiving control information, a base station, and a terminal. BACKGROUND OF THE INVENTION In order to realize the performance requirements of high-speed data services for wireless communication systems, the current third-generation partner program (3rd)

International Standards Organizations such as Generation Partnership Project (3GPP) are considering introducing a new class of wireless nodes into wireless communication systems. Compared to Macro base stations, such new types of wireless nodes, such as Pico base stations, have the advantage of lower transmit power. The introduction of these new wireless nodes has made the topology of wireless communication systems more heterogeneous, thus forming a new interference environment in which multiple types of wireless nodes compete for the same wireless resources. A specific schematic diagram of the interference environment is shown in Figure 1. The figure shows the interference between the macro cell and the Pico cell, between the macro cell and the macro cell, between the macro cell and the relay station, and between the macro cell and the femto cell.

 Based on the environment shown in FIG. 1 , after the cell range expansion (CRE) technology is used in the environment, the terminal at the edge of the cell covered by the Pico base station signal (hereinafter referred to as a Pico cell) (User Equipment, The UE) is subject to strong interference from the Macro base station (macro base station).

 In the above-mentioned interference scenario, 3GPP proposes to avoid inter-cell interference by techniques of coordinating time domain resources. Specifically, the technique is to set a partial subframe of the interference source cell to an Almost Blank Subframe (ABS), and cause the victim cell to schedule the UE that is severely disturbed only in these subframes. Since the ABS only transmits common pilot signals and a small amount of control and data information such as synchronization, broadcast information block (MIB, Master Information Block) information, system information block (SIB, System Information Block) 1 information, paging information, etc., Significantly reduce the interference experienced by UEs in the victim cell. An example of time domain interference coordination for a single unit is shown in Figure 2. In Fig. 2, it is assumed that the cell covered by the Macro base station signal (hereinafter referred to as the Macro cell) is a ghost source cell, and the ABS set is as shown in the lower part of FIG. The Pico cell is a victim cell, and the subframes for scheduling the heavily interfered UEs respectively correspond to the ABSs set by the Macro base station.

To implement the above-described time domain interference coordination scheme provided by the prior art, the Macro base station must determine which subframes to set as ABS and notify the UE by signaling. The Macro base station must also set an ABS period and set it in each ABS period. The same subframe is set to ABS. This mode of setting the ABS and ABS periods is called ABS pattern. Based on this mode, the Macro base station only needs to inform the UE of its ABS pattern. In addition, when setting the ABS pattern, the Macro base station can consider the timing requirements of the Hybrid Automatic Repeat Request (HARQ). This is because Long Term Evolution (LTE) uses synchronous HARQ technology in the uplink, that is, ACK, Acknowledgement/Negative Acknowledgement feedback and retransmission with respect to the initial transmission of data in time. The location is fixed.

 The disadvantages of the above-mentioned time domain interference coordination scheme provided by the prior art are: In the ABS, although the Macro cell as the interference source cell does not transmit or transmit the scheduling data of the UE at low power, the wireless communication system is still transmitted. Necessary control information, such as MIB information, SIB information, primary/secondary synchronization information, pilot information, paging information, etc., considering that the power transmitted by the Macro base station is larger than that of the Pico base station in general, when the UE is in two cell overlaps When the edge of the coverage area or the Cell Range Extension (CRE) of the Pico cell is used, for the UE in the interfered 'J, the Pico cell, when it receives the control information sent by the Pico base station in the AB S, The partial or partial control information sent by the macro cell in the AB S may cause strong interference to the UE, thereby greatly reducing the validity and reliability of the control information sent by the Pico base station received by the UE. SUMMARY OF THE INVENTION Embodiments of the present invention provide a method, a system, and a base station for transmitting control information, which are used to solve the validity and reliability of control information provided by a UE that is received by a UE in a solution provided by the prior art. Not a high problem.

 The embodiment of the invention further provides a method and a terminal for receiving control information.

 The following technical solutions are used in the embodiments of the present invention:

 A control system for transmitting information, including a first base station and a terminal, further comprising a second base station, wherein: the first base station is configured to determine control information to be sent to the terminal, and send the control information to the second The second base station is configured to receive the control information sent by the first base station, and send the control information to the terminal.

 A method for transmitting control information, comprising: determining, by a first base station, control information to be sent to a terminal; and transmitting the control information to a second base station, instructing the second base station to send the control information to the terminal.

 A method for transmitting control information, comprising: receiving, by a second base station, control information sent by a first base station; and transmitting the control information to a terminal.

A control information receiving method includes: receiving, by a terminal, a co-frequency carrier aggregation working mode triggering instruction sent by a second base station, and maintaining a connection between the terminal and the second base station, and establishing the terminal and the coverage station a connection between the first base station of the cell indicated by the cell identifier; and receiving, according to the connected connection between the terminal and the second base station, control information sent by the second base station, and based on the terminal and the first base station The connection between the first base station is received. A base station, comprising: a control information determining unit, configured to determine control information to be sent to a terminal; a first indication unit, configured to send control information determined by the control information determining unit to another base station, instructing other base stations to perform the control The information is sent to the terminal.

 A base station, comprising: a control information receiving unit, configured to receive control information sent by another base station; and a control information sending unit, configured to send control information received by the control information receiving unit to the terminal.

 A terminal, comprising: a triggering instruction receiving unit, configured to receive a co-frequency carrier aggregation working mode triggering instruction sent by a second base station and carrying a cell identifier; and a connecting unit, configured to: after the triggering instruction receiving unit receives the instruction, Maintaining a connection between the terminal and the second base station, and establishing a connection between the terminal and a first base station of the cell covering the cell identifier indication; a control information receiving unit, configured to use the terminal and the terminal maintained by the connection unit The connection between the second base station receives the control information sent by the second base station, and receives the control information sent by the first base station based on the connection between the terminal and the first base station established by the connection unit.

 The beneficial effects of the embodiments of the present invention are as follows:

 The foregoing solution provided by the embodiment of the present invention ensures the validity and reliability of the control information received by the terminal through the cooperative transmission of the control information provided by the first base station and the second base station to the first base station. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a disturbing environment after a new type of wireless node is introduced;

 2 is a schematic diagram of a time domain interference coordination scheme provided by the prior art;

 FIG. 3 is a schematic flowchart of a method for sending control information according to an embodiment of the present disclosure;

 4 is a schematic flowchart of another method for sending control information according to an embodiment of the present invention; FIG. 5 is a schematic flowchart of a method for receiving control information according to an embodiment of the present invention;

 6 is a schematic diagram of a macro base station and a Pico base station cooperatively transmitting control information;

 FIG. 7 is a schematic diagram of triggering of a co-frequency carrier aggregation working mode;

 8 is a schematic flowchart of a Pico base station transmitting control information to a Macro base station;

 9 is a schematic diagram of a specific process of a macro base station transmitting control information sent by a Pico base station to a UE;

 Figure 10 is a schematic flow chart of stopping the "same frequency carrier aggregation working mode";

 FIG. 11 is another schematic flowchart of stopping the “same frequency carrier aggregation working mode”;

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

 FIG. 13 is a schematic structural diagram of another base station according to an embodiment of the present disclosure;

FIG. 14 is a schematic structural diagram of a terminal according to an embodiment of the present invention. detailed description In order to solve the problem that the validity and reliability of the control information provided by the UE that is received by the UE in the prior art is not high, the embodiment of the present invention provides a control scheme for transmitting information, by using a The cooperative transmission of the control information provided by the interference base station between the interference base stations ensures the validity and reliability of the control information received by the terminal.

 The transmission scheme of the control information provided by the embodiment of the present invention is described in detail below with reference to the accompanying drawings.

 The embodiment of the present invention first provides a method for transmitting control information. The specific process diagram of the method is shown in FIG. 3, and includes the following steps:

 Step 31: The first base station determines control information to be sent to the UE, where the control information herein may be, but is not limited to, one or more of the following information:

 One or more subsystem information blocks, primary/secondary synchronization information, pilot information, paging information, and part or all of information included in physical downlink control channel (PDCCH) information of the MIB information, the SIB information; The SIB information may be one or more of the SIB1 SIB13, and preferably may include the SIB1.

 Step 32: The first base station sends the determined control information to the second base station, instructing the second base station to send the control information to the UE.

 It should be noted that the above control information is not limited to the above-listed information. The scheme in which the first base station transmits other control information than the above information to the second base station, and instructs the second base station to transmit the control information to the UE is also in the protection scope of the present invention.

 It can be seen from the foregoing steps that when the first base station is a victim base station, it can send control information to the second base station, and the second base station sends the control information to the UE, and at least one of the following conditions is met. The validity and reliability of the control information received by the UE by the victim base station can be significantly improved:

 Condition 1: The transmit power of the second base station detected by the UE is greater than the transmit power of the first base station detected by the terminal; Condition 2: The first base station also sends the control information to the UE.

 In the embodiment of the present invention, the triggering condition for the first base station to send the control information to the second base station may be: the first base station determines that the first base station receives the same information that is sent by the second base station to instruct the first base station to send the control information to the second base station. The frequency carrier aggregation mode of operation triggers the instruction. The intra-frequency carrier aggregation working mode triggering instruction herein may be, but is not limited to, an ABS configuration command or a handover request signaling. When the ABS configuration command or the handover request signaling is reused, the corresponding indication information may be added to the signaling, so that the first base station that receives the signaling can learn, according to the indication information, that it is about to send the second base station that sends the signaling. The mode of the same-frequency carrier aggregation operation mode is established, which is a transmission mode established based on the above solution provided by the embodiment of the present invention.

 In the embodiment of the present invention, after the first base station sends the control information to the second base station, the method further includes the following steps:

First, the first base station determines whether the reference signal measurement result sent by the terminal meets the preset co-frequency carrier aggregation working mode. For example, the condition here may be, but is not limited to, the reference signal strength value of the second base station detected by the UE is less than the first threshold, or the reference signal strength value of the second base station detected by the UE minus the first base station. The difference between the reference signal strength values is less than the second threshold, or the condition herein may be other trigger conditions specified by the communication system or the communication specification;

 Then, when the determination result is yes, the same-frequency carrier aggregation working mode stop instruction for instructing the terminal to release the connection between the second base station and the terminal is sent to the terminal, or the second base station is requested to send the same-frequency carrier aggregation work to the terminal. Mode stop command.

 In the embodiment of the present invention, the first base station may send a message carrying the information of the sending time information to the second base station, and instruct the second base station to send the control information to the terminal at the time indicated by the time information. The first base station may determine the time at which the second base station receives the control information, and send the control information to the terminal at the time.

 The embodiment of the present invention further provides another method for transmitting control information. The specific process diagram of the method is shown in FIG. 4, and includes the following steps:

 Step 41: The second base station receives control information sent by the first base station.

 Step 42: The second base station sends the control information to the terminal.

 Preferably, the second base station may send the control information to the terminal by using dedicated control signaling, where the dedicated control signaling may be, but not limited to, Radio Resource Control (RRC) layer signaling or media shield access control. (Media Access Control, MAC) layer signaling.

 In order to trigger the first base station to send control information to the second base station, before the second base station receives the control information sent by the first base station, the second base station may send, to the first base station, the first base station to send control information to the second base station. The same frequency carrier aggregation working mode triggering instruction, the same frequency carrier aggregation working mode triggering instruction may be a new instruction in the system, or may be an existing instruction in the system (such as an ABS configuration instruction). The advantage of this trigger instruction being an existing instruction in the system is that there is no need to add a new instruction, which saves processing resources.

 In the embodiment of the present invention, after the second base station sends the control information to the terminal, it may further determine whether the reference signal measurement result sent by the terminal meets a preset co-frequency carrier aggregation working mode stop condition; When yes, the intra-frequency carrier aggregation working mode stop instruction for instructing the terminal to release the connection between the first base station and the terminal is sent to the terminal. The co-frequency carrier aggregation working mode stop condition may be, but is not limited to, the reference signal strength value of the first base station detected by the terminal is less than a third threshold, or the reference signal strength value of the second base station detected by the terminal is subtracted from the first The difference between the reference signal strength values of a base station is greater than a fourth threshold, or the condition may be other trigger conditions specified by the communication system or communication specification.

 The embodiment of the present invention further provides a method for receiving control information. The specific process diagram of the method is as shown in FIG. 5, and includes the following steps:

Step 51: The terminal receives an intra-frequency carrier aggregation working mode triggering instruction sent by the second base station, where the intra-frequency carrier aggregation working mode triggering instruction is an ABS configuration command or reconfiguration signaling sent to the UE, where the instruction may Carrying a cell identity;

 Step 52: The terminal maintains a connection between the terminal and the second base station. When the command carries the cell identifier, the terminal further needs to establish a connection between the terminal and the first base station of the cell that covers the cell identifier indication.

 Step 53: The terminal receives control information sent by the second base station, where the second base station may send, by using dedicated control signaling, such as RRC layer signaling or MAC layer signaling, based on the connection between the maintained terminal and the second base station. The control information.

 Preferably, when the terminal establishes a connection with the first base station, the terminal may further receive the control information sent by the first base station.

 Preferably, the method may further include: the terminal obtaining the reference signal measurement result, and transmitting the reference signal measurement result to the second base station; receiving the same frequency carrier aggregation working mode stop instruction fed back by the second base station according to the reference signal measurement result; The stop command releases the connection between the terminal and the first base station.

 Alternatively, the method may further include: the terminal obtaining the reference signal measurement result, and transmitting the reference signal measurement result to the first base station; receiving the same-frequency carrier aggregation working mode stop instruction fed back by the first base station according to the reference signal measurement result; The instruction received by the instruction receiving unit releases the connection between the terminal and the second base station.

 Preferably, the intra-frequency carrier aggregation operation mode stop command is a reconfiguration command of Release 10 (Release 10, R10).

 In a practical application, the transmission mode established according to the foregoing solution provided by the embodiment of the present invention may be referred to as “same frequency carrier aggregation working mode” or may also be referred to as “same frequency cell aggregation working mode”. According to this shield, the mode refers to providing services to one UE simultaneously in a heterogeneous cell in the same frequency layer, and the data transmission modes provided by multiple cells are different. Based on the mode, in the environment shown in FIG. 1, both the Macro base station and the Pico base station can send necessary control information to be sent by the Pico base station to the UE, so that the UE can receive the control information provided by the Pico base station and forwarded by the Macro base station. And can receive control information directly sent by the Pico base station. Since the transmission power of the Macro base station is larger than the transmission power of the Pico base station, the control information transmitted by the Pico base station is less disturbing to the control information transmitted by the Macro base station, and therefore, compared with the control information transmitted by the receiving Pico base station. The UE can improve the validity and reliability of the received control information by receiving control information sent by the Macro base station having a larger transmit power. In the embodiment of the present invention, the UE may also select to receive only the control information provided by the Pico base station forwarded by the Macro base station without monitoring and receiving the control information sent by the Pico base station.

 In the embodiment of the present invention, a schematic diagram of the macro base station and the Pico base station cooperating to transmit control information is shown in FIG. 6. In FIG. 6, the Pico base station sends the control information to be sent to the UE to the Macro base station, and then the macro base station sends the control information to the Pico base station, and the Pico base station also sends the control information to the UE in a broadcast manner.

 In the "same frequency carrier aggregation working mode" proposed by the embodiment of the present invention, the coordinated transmission process of the control information provided by the Macro base station and the Pico base station to the Pico base station can be divided into the following four steps:

The first step: triggering of the same frequency carrier aggregation working mode; The main function of the first step is to trigger the UE, the Macro base station and the Pico base station to work in the same frequency carrier aggregation mode. Specifically, the first step can be divided into the following steps as shown in FIG. 7:

 Step 71: The UE performs measurement of the reference signal strength value and reports the measurement result to the Macro base station.

 Step 72: The macro base station determines, according to the cell identifier (IDentity, ID) carried in the measurement result reported by the UE, the cell ID to be aggregated.

 Step 73: The macro base station sends a “same frequency carrier aggregation working mode” triggering instruction to the UE and the Pico base station that covers the cell that is determined by the cell ID, where the “same frequency carrier aggregation working mode” triggering instruction is sent to the UE. Carrying the identified cell ID;

 It should be noted that the "same frequency carrier aggregation working mode" triggering command sent by the Macro base station to the UE may be a reconfiguration command of the R10 provided by the prior art; and the "same frequency carrier aggregation working mode sent by the Macro base station to the Pico base station. The trigger instruction can reuse the ABS configuration instructions based on the RIO X2 interface transmission provided by the prior art. After receiving the "co-frequency carrier aggregation working mode" trigger command, the Pico base station can know whether the control information sent to the UE in the ABS needs to be sent to the Macro base station.

 Step 74: The UE performs a reconfiguration operation after receiving the “same frequency carrier aggregation working mode” triggering instruction, and while maintaining the connection with the Macro base station, and covering the cell indicated by the cell ID carried in the instruction The Pico base station establishes an RRC connection, and the process ends. It should be noted that the connection establishment process between the UE and the Pico base station is similar to the access process of the UE and the scell defined in the R10, and details are not described herein again.

 It can be seen that, in order to minimize the impact on the protocol, in the embodiment of the present invention, the "same frequency carrier aggregation working mode" triggering instruction can be sent by reusing existing signaling.

 The second step: the Pico base station sends the control information to be sent to the Macro base station;

 The second step can be divided into the following steps as shown in Figure 8:

 Step 81: The Pico base station determines necessary control information to be sent in the ABS, and the necessary control information may be MIB information, one or more subsystem information blocks in the SIB information, primary/secondary synchronization information, pilot information, and homing One or more of the information such as the information; wherein the SIB information may be one or more of the SIB1 SIB13, and preferably, the SIB1 may be included.

 Step 82: The Pico base station sends the foregoing control information to the Macro base station through the inter-base station interface, and the Pico base station negotiates with the Macro base station to determine a sending time for sending the control information to the UE.

 There are two ways to negotiate the above transmission time. The first mode is that the Pico base station estimates the time when the Macro base station receives the control information according to the transmission delay when transmitting the control information to the Macro base station, and instructs the Macro base station to send the control information to the UE at the moment, and simultaneously The Pico base station also sends the control information to the UE at the estimated time; the second method is that the Pico base station indicates a transmission time to the Macro base station, and the Macro base station transmits the received control information at the transmission time.

Step 83: After receiving the foregoing control information, the Macro base station returns, to the Pico base station, confirmation information that the reception is successful. Preferably, the foregoing 83 is an optional step, and the Macro base station may not return the acknowledgement information to the Pico base station. The third step: the Macro base station sends the control information sent by the Pico base station to the UE;

 A schematic diagram of the third step is shown in Figure 9. After the macro base station sends the control information sent by the Pico base station to the UE, the UE may also return an acknowledgement message of successful reception to the Macro base station. Of course, depending on the actual situation, the UE may not return the acknowledgement message to the Macro base station.

 It should be noted that the Macro base station may use dedicated control signaling (such as RRC layer signaling or MAC layer signaling) to transmit control information sent by the Pico base station; it may also transmit the control information by reusing the R10 procedure. In addition, when the control information to be sent to the UE changes (such as new control information or control information is modified), the Pico base station may only change the part of the control information (including the added and modified control information). Send to the Macro base station and forward it to the UE by the Macro base station; or send all necessary control information including the changed control information (including the added and modified control information) to the Macro base station. And forwarded to the UE by the Macro base station.

 The fourth step: Stop the "same frequency carrier aggregation working mode", the process ends.

 In the embodiment of the present invention, the fourth step may have two cases as shown in FIG. 10 and FIG. 11 respectively.

 The scenario shown in FIG. 10 is a scenario in which the UE detects that the signal of the Pico base station is weakened. The process of stopping the "same frequency carrier aggregation working mode" in this scenario includes the following steps:

 Step 101: The UE performs reference signal strength value measurement and channel state feedback according to the configuration on the network side. Step 102: The Macro base station determines, according to the reference signal strength value and channel state measured by the UE, the reference signal received power of the Pico base station (Reference) Signal Receiving Power, RSRP (or Reference Signal Received Quality (RSRQ)) is below a certain threshold (or determine whether the current reference signal strength value and channel state meet the preset trigger reporting event), and When the determination result is yes, step 103 is performed;

 Step 103: The Macro base station sends a “same frequency carrier aggregation working mode” stop command to the UE and the Pico base station respectively. Step 104: After receiving the “same frequency carrier aggregation working mode” stop command, the UE performs a reconfiguration process. Step 105 The UE performs an operation of releasing its connection with the Pico base station, and the flow ends.

 The scenario shown in FIG. 11 is a scenario in which the UE detects the signal enhancement of the Pico base station, and the process of stopping the "same frequency carrier aggregation working mode" in the scenario includes the following steps:

 Step 111: The UE performs reference signal strength value measurement and channel state feedback according to the configuration on the network side. Step 112: The Pico base station determines according to the reference signal strength value and channel state measured by the UE, and determines whether the RSRP (or RSRQ) of the Pico base station is More than a certain threshold (or determine whether the current reference signal strength value and channel state meet the preset trigger reporting event), and when the determination result is yes, step 113;

Step 113: The Pico base station sends a “same frequency carrier aggregation working mode” stop command to the UE and the Macro base station respectively. Step 114: After receiving the “same frequency carrier aggregation working mode” stop command, the UE may further perform the Reconfiguration signaling delivered by the network side, performing a reconfiguration process;

 It should be noted that, if the "same frequency carrier aggregation working mode" stop command is to reuse the reconfiguration signaling of the system, the UE may directly perform the reconfiguration process according to the reconfiguration signaling. If the re-configuration command is not re-used, the UE may further obtain the reconfiguration signaling sent by the network, and perform reconfiguration according to the reconfiguration command as described in step 114. process.

 After receiving the "same frequency carrier aggregation working mode" stop command, the UE may determine to continue to perform step 115 after confirming that the corresponding Macro Base Station ID is deleted in the stop command.

 Step 115: The UE performs an operation of releasing the connection between the UE and the Macro base station, and the process ends.

 In the above steps, the UE may also not perform the process of reconfiguration.

 It should be noted that, in the foregoing step 113, the Pico base station may also send a "same frequency carrier aggregation working mode" stop request command to the Macro base station, and the "same frequency carrier aggregation working mode" stop command may receive the same The frequency carrier aggregation mode of operation "stops the application of the commanded Macro base station to transmit to the UE, thereby performing the subsequent steps 114, 115.

 Specifically, in the foregoing process, the "base frequency carrier aggregation working mode" sent by the Macro base station (or the Pico base station) to the UE, the stop indication may be transmitted by using the existing reconfiguration signaling. The manner of deleting the cell ID in the reconfiguration command, so that the UE knows that the operation should be stopped under the "same frequency carrier aggregation working mode".

 In particular, in the "same frequency carrier aggregation working mode" proposed by the embodiment of the present invention, the concepts of "primary cell or primary carrier pcell" and "secondary cell or secondary carrier scell" may continue to be used. For example, the cell in which the UE originally resides may be referred to as a “primary cell”; or the cell that is reconfigured by the network side for the UE entering the working mode is referred to as a “primary cell”; or the UE is in the same manner as the primary cell and the Pico cell. In the case, the Macro cell is referred to as a "primary cell" and the Pico cell is referred to as a "secondary cell".

 The embodiment of the present invention provides a specific description of the control information scheme provided by the embodiment of the present invention. The scheme provided by the embodiment of the present invention can be applied to other schemes. Heterogeneous cells with unequal or non-equal transmission power coexist in the scenario. For example, the solution may also be applied in a scenario where the Macro base station and the femto base station cooperate to transmit control information to the UE. In this scenario, the cell where the femto base station is located is a victim cell, and the cell where the Macro base station is located is a victim cell. It should be noted that the foregoing solutions provided by the embodiments of the present invention are applicable within the scope of the present invention.

Corresponding to the method for transmitting the foregoing control information provided by the embodiment of the present invention, the embodiment of the present invention further provides a system for transmitting control information, where the system includes a first base station, a terminal, and a second base station, where specific functions of each part are as follows The first base station is configured to determine control information to be sent to the terminal, and send the control information to the second base station. The second base station is configured to receive control information sent by the first base station, and send the control information to the terminal. Specifically, the second base station may be specifically configured to send control information to the terminal by using dedicated control signaling, where the dedicated control signaling may be, but is not limited to, RRC layer signaling or MAC layer signaling. Preferably, the first base station sends the control information to the second base station, specifically:

 Determining, by the first base station, an intra-frequency carrier aggregation working mode triggering instruction sent by the second base station to instruct the first base station to send control information to the second base station, and when the determination result is yes, the first base station performs the control The information is sent to the second base station. Here, the co-frequency carrier aggregation working mode triggering command can be, but is not limited to, an ABS configuration command.

 Preferably, the first base station is further configured to: after the control information is sent to the second base station, determine whether the reference signal measurement result sent by the terminal meets a preset first co-frequency carrier aggregation working mode stop condition; If yes, the same-frequency carrier aggregation working mode stop command is sent to the terminal for instructing the terminal to release the connection between the second base station and the terminal, or the second base station is requested to send the same-frequency carrier aggregation working mode stop command to the terminal.

 Preferably, the first co-frequency carrier aggregation mode stop condition may be, but is not limited to, the reference signal strength value of the second base station detected by the terminal is less than a first threshold, or the reference signal strength value of the second base station detected by the terminal is decreased. The difference in reference signal strength values to the first base station is less than the second threshold.

 Preferably, the second base station is further configured to: after receiving the control information sent by the first base station, determine whether the reference signal measurement result sent by the terminal meets a preset second intra-frequency carrier aggregation working mode stop condition; And transmitting a co-frequency carrier aggregation working mode stop instruction for instructing the terminal to release the connection between the first base station and the terminal.

 Preferably, the second intra-frequency carrier aggregation working mode stop condition may be, but is not limited to, the reference signal strength value of the first base station detected by the terminal is less than a third threshold, or the reference signal strength of the second base station detected by the terminal. The difference between the value minus the reference signal strength value of the first base station is greater than a fourth threshold.

 Preferably, the first base station is further configured to send a message carrying the transmission time information to the second base station; and the second base station is specifically configured to send the control information to the terminal at the time indicated by the time information.

 Preferably, the first base station is further configured to determine a time when the second base station receives the control information, and send control information to the terminal at the moment.

 Preferably, the second base station is further configured to send, to the terminal, information indicating a time when the control information is valid.

 Preferably, the second base station may also control the effective time of the information according to the existing standard parameters in the communication standard or the specification, and notify the terminal of the effective time of the agreement. After the terminal knows the effective time, the terminal can update the relevant configuration of the terminal by using the received control information at the effective time.

 Corresponding to the foregoing solution provided by the embodiment of the present invention, the embodiment of the present invention further provides a base station, and a specific structural diagram of the base station is shown in FIG. 12, and includes the following functional units:

 The control information determining unit 121 is configured to determine control information to be sent to the terminal;

 The first indication unit 122 is configured to send the control information determined by the control information determining unit 121 to other base stations, and instruct the other base stations to send the control information to the terminal.

 Preferably, the first indication unit 122 is specifically configured to instruct the other base station to send control information to the terminal by using dedicated control signaling, where the dedicated control signaling is RRC layer signaling or MAC layer signaling.

Preferably, the first indicating unit 122 specifically includes: a determining module, configured to determine whether the same-frequency carrier aggregation working mode triggering instruction sent by the other base station to indicate that the base station shown in FIG. 12 sends the control information to the other base station is received; When the determination result obtained by the determining module is yes, the control information is sent to the other base station, and the other base station is instructed to send the control information to the terminal. The intra-frequency carrier aggregation working mode triggering instruction herein may be, but is not limited to, an ABS configuration command or a handover request signaling.

 Preferably, the base station may further include:

 a determining unit, configured to: after the indicating unit sends the control information to the other base station, determine whether the reference signal measurement result sent by the terminal meets a preset co-frequency carrier aggregation working mode stop condition;

 a second indicating unit, configured to: when the determining result obtained by the determining unit is yes, send, to the terminal, an intra-frequency carrier aggregation working mode stop instruction for instructing the terminal to release the connection between the other base station and the terminal, or request the The other base station transmits the stop command to the terminal.

 Preferably, the co-frequency carrier aggregation working mode stop condition may be, but is not limited to, detecting that the reference signal strength value of the other base station is less than the first threshold, or the reference signal strength value of the other base station detected by the terminal minus The difference between the reference signal strength values of the base stations shown in FIG. 12 is less than the second threshold.

 Corresponding to the above solution provided by the embodiment of the present invention, the embodiment of the present invention further provides another base station, and the specific structure of the base station is shown in FIG. 13 and includes the following functional units:

 The control information receiving unit 131 is configured to receive control information sent by other base stations;

 The control information transmitting unit 132 is configured to send the control information received by the control information receiving unit 131 to the terminal. Preferably, the control information sending unit is specifically configured to send the control information to the terminal by using dedicated control signaling. Preferably, the base station may further include:

 The triggering instruction sending unit is configured to send, to the other base station, a co-frequency carrier aggregation working mode trigger for instructing the other base station to send control information to the base station as shown in FIG. 13 before the control information receiving unit receives the control information. The instruction, where the intra-frequency carrier aggregation working mode triggering instruction is not limited to being an ABS configuration command or a handover request signaling.

 Preferably, the base station may further include:

 a determining unit, configured to: after the control information sending unit sends the control information to the terminal, determine whether the reference signal measurement result sent by the terminal meets a preset co-frequency carrier aggregation working mode stop condition; and the stop instruction sending unit is configured to be obtained in the determining unit If the determination result is yes, the intra-frequency carrier aggregation operation mode stop instruction for instructing the terminal to release the connection between the other base station and the terminal is sent to the terminal.

 Preferably, the second intra-frequency carrier aggregation operation mode stop condition is that the reference signal strength value of the other base station detected by the terminal is less than a third threshold, or the reference signal of the base station detected by the terminal as shown in FIG. The difference between the intensity value minus the reference signal strength values of the other base stations is greater than a fourth threshold.

Corresponding to the foregoing solution provided by the embodiment of the present invention, the embodiment of the present invention further provides a terminal, and the specific The structure diagram is shown in Figure 14, including the following functional units:

 The triggering instruction receiving unit 141 is configured to receive a co-frequency carrier aggregation working mode triggering instruction that is sent by the second base station and carries the cell identifier;

 The connection unit 142 is configured to: after the trigger instruction receiving unit 141 receives the instruction, maintain a connection between the terminal and the second base station, and establish a connection between the terminal and the first base station of the cell that covers the cell identifier indication;

 The control information receiving unit 143 is configured to receive control information sent by the second base station based on the connection between the terminal and the second base station that is maintained by the connection unit 142, and based on the connection between the terminal established by the connection unit 142 and the first base station, Receiving control information sent by the first base station.

 Preferably, the control information receiving unit 143 is specifically configured to receive control information sent by the second base station by using dedicated control signaling, where the dedicated control signaling may be, but not limited to, RRC layer signaling or MAC layer signaling.

 Preferably, the intra-frequency carrier aggregation working mode triggering instruction is an ABS configuration command or reconfiguration signaling sent to the UE.

 Preferably, the terminal may further include:

 a measurement result sending unit, configured to obtain a reference signal measurement result, and send the reference signal measurement result to the second base station; the stop instruction receiving unit is configured to receive the feedback of the reference signal measurement result sent by the second base station according to the measurement result sending unit The frequency carrier aggregation operation mode stop instruction; the connection release unit, configured to release the connection between the terminal and the first base station according to the instruction received by the stop instruction receiving unit.

 Alternatively, the foregoing terminal may further include:

 a measurement result sending unit, configured to obtain a reference signal measurement result, and send the reference signal measurement result to the first base station; the stop instruction receiving unit is configured to receive the feedback of the reference signal measurement result sent by the first base station according to the measurement result sending unit The frequency carrier aggregation operation mode stop instruction; the connection release unit, configured to release the connection between the terminal and the second base station according to the instruction received by the stop instruction receiving unit.

 The above-described co-frequency carrier aggregation mode stop command may be, but is not limited to, a reconfiguration command of R10.

 Preferably, the terminal may further include an updating unit, configured to update the related configuration of the terminal according to the control information received by the control information receiving unit.

Preferably, the control information receiving unit is further configured to receive, according to the connection between the terminal and the first base station, the control information sent by the first base station, where the update unit is specifically configured to: The control information sent by the first base station and the second base station received by the receiving unit is updated, and the related configuration of the terminal is updated. For example, when the control information receiving unit receives the control information sent by the first base station or the second base station, the update unit may first update the relevant configuration of the terminal according to the control information, and then, when receiving the control information sent by the first base station, The control information sent by the first base station is compared with the control information sent by the second base station, and when the two are inconsistent, the related configuration of the terminal is updated by using the control information sent by the first base station. On the other hand, if the update unit first receives the control information sent by the first base station and then receives the control information sent by the second base station, the two are compared. When they are consistent, the related configuration of the terminal may be updated using the control information sent by the second base station that is received later. Furthermore, although the first base station broadcasts control information to the terminal, the terminal may also choose not to listen to the control information broadcast by the first base station, but only receive the control information sent by the second base station.

 Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

 The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each process and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

 The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

 These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

 Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

 It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, it is intended that the present invention cover the modifications and modifications of the inventions

Claims

Rights request

A system for transmitting control information, comprising a first base station and a terminal, further comprising a second base station, the towel:

 The first base station is configured to determine control information to be sent to the terminal, and send the control information to the second base station;

 The second base station is configured to receive the control information sent by the first base station, and send the control information to the terminal.

 2. The system according to claim 1, wherein the second base station is specifically configured to send the control information to the terminal by using dedicated control signaling.

 3. The system according to claim 2, wherein the dedicated control signaling is RRC layer signaling or MAC layer signaling.

 The system of claim 1, wherein the first base station sends the control information to the second base station, specifically:

 Determining, by the first base station, an intra-frequency carrier aggregation working mode triggering instruction sent by the second base station to instruct the first base station to send the control information to the second base station, and when the determination result is yes, the first base station The control information is sent to the second base station.

 The system according to claim 4, wherein the intra-frequency carrier aggregation working mode triggering instruction is a near-space subframe ABS configuration command or handover request signaling.

 The system according to claim 1 or 4, wherein the first base station is further configured to: after transmitting the control information to the second base station, determining whether the reference signal measurement result sent by the terminal meets a preset number And a co-frequency carrier aggregation working mode stop condition; and when the determination result is yes, sending a co-frequency carrier aggregation working mode stop instruction for instructing the terminal to release the connection between the second base station and the terminal, or requesting the second base station The intra-frequency carrier aggregation working mode stop instruction is sent to the terminal.

 The system according to claim 1 or 4, wherein the second base station is further configured to: after receiving the control information sent by the first base station, determine whether the measurement result of the reference signal sent by the terminal satisfies And setting a second intra-frequency carrier aggregation working mode stop condition; and when the determination result is yes, sending a co-frequency carrier aggregation working mode stop instruction for instructing the terminal to release the connection between the first base station and the terminal to the terminal.

 The system according to claim 1, wherein the first base station is further configured to send, to the second base station, a message carrying the transmission time information;

 The second base station is specifically configured to send the control information to the terminal at the time indicated by the time information.

The system according to claim 1, wherein the first base station is further configured to determine a time when the second base station receives the control information, and send the control information to the terminal at the moment.

The system according to any one of claims 1 to 5, 8 to 9, wherein the control information is one or more of the following information:

 Master information block MIB information; System information block One or more subsystem information blocks in the SIB information; Primary/secondary synchronization information; Pilot information; Paging information; Physical downlink control channel Part or all of the information contained in the PDCCH information.

 A method for transmitting control information, comprising:

 The first base station determines control information to be sent to the terminal; and

 Sending the control information to the second base station, instructing the second base station to send the control information to the terminal.

 The method of claim 11, wherein the sending, by the first base station, the control information to the second base station comprises:

 Determining, by the first base station, an intra-frequency carrier aggregation working mode triggering instruction sent by the second base station for instructing the first base station to send the control information to the second base station; and

 When the determination result is yes, the first base station transmits the control information to the second base station.

 The method according to claim 11 or 12, wherein, after the first base station sends the control information to the second base station, the method further includes:

 Determining, by the first base station, whether the reference signal measurement result sent by the terminal meets a preset co-frequency carrier aggregation working mode stop condition;

 When the determination result is yes, the same-frequency carrier aggregation operation mode stop instruction for instructing the terminal to release the connection between the second base station and the terminal is sent to the terminal, or the second base station is requested to send the stop instruction to the terminal.

 The method according to claim 11, further comprising: the first base station transmitting, to the second base station, a message carrying the transmission time information;

 The first base station instructs the second base station to send the control information to the terminal, specifically:

 The first base station instructs the second base station to send the control information to the terminal at the time indicated by the time information.

 The method of claim 11, further comprising:

 The first base station determines a time at which the second base station receives the control information, and transmits the control information to the terminal at the time.

 A method for transmitting control information, comprising:

 Receiving, by the second base station, control information sent by the first base station; and

 Sending the control information to the terminal.

 The method according to claim 16, wherein after the second base station sends the control information to the terminal, the method further includes:

 The second base station determines whether the reference signal measurement result sent by the terminal meets the preset co-frequency carrier aggregation working mode stop condition;

When the determination result is yes, sending a same frequency to the terminal for instructing the terminal to release the connection between the first base station and the terminal Carrier aggregation operation mode stop instruction.

 18. A method of receiving control information, comprising:

 Receiving, by the second base station, a co-frequency carrier aggregation working mode triggering command sent by the second base station, and maintaining the connection between the terminal and the second base station, and establishing the first terminal and the cell covering the cell identifier indication a connection between base stations;

 And receiving, according to the connection between the terminal and the second base station, control information sent by the second base station, and receiving control information sent by the first base station based on the connection between the terminal and the first base station.

 19. The method of claim 18, further comprising:

 Receiving, by the terminal, the reference signal measurement result, and transmitting the reference signal measurement result to the second base station; and receiving the same-frequency carrier aggregation working mode stop instruction fed back by the second base station according to the reference signal measurement result; and releasing according to the stop instruction a connection between the terminal and the first base station.

 20. The method of claim 18, further comprising:

 Receiving, by the terminal, a reference signal measurement result, and transmitting the reference signal measurement result to the first base station; receiving an intra-frequency carrier aggregation working mode stop instruction fed back by the first base station according to the reference signal measurement result; and receiving, by the receiving unit according to the stop instruction Said to release a connection between the terminal and the second base station.

The method according to claim 19 or 20, wherein the intra-frequency carrier aggregation operation mode stops the reconfiguration command of the instruction R10.

 22. A base station, comprising:

 a control information determining unit, configured to determine control information to be sent to the terminal;

 And a first indication unit, configured to send the control information determined by the control information determining unit to the other base station, and instruct the other base station to send the control information to the terminal.

 The base station according to claim 22, wherein the first indication unit comprises: a determining module, configured to determine whether the base station sends the base station to the other base station Sending the same frequency carrier aggregation working mode triggering instruction of the control information;

 And an indication module, configured to send the control information to the other base station when the determining result obtained by the determining module is yes, instructing other base stations to send the control information to the terminal.

 The base station according to claim 22, further comprising:

 a determining unit, configured to determine, after the indicating unit sends the control information to the other base station, whether the reference signal measurement result sent by the terminal meets a preset co-frequency carrier aggregation working mode stop condition;

 a second indicating unit, configured to: when the determining result obtained by the determining unit is yes, send, to the terminal, an intra-frequency carrier aggregation working mode stop instruction for instructing the terminal to release the connection between the other base station and the terminal, or request the The other base station sends the intra-frequency carrier aggregation working mode stop command to the terminal.

25. A base station, comprising: a control information receiving unit, configured to receive control information sent by other base stations;

 The control information sending unit is configured to send the control information received by the control information receiving unit to the terminal.

 The base station according to claim 25, further comprising:

 a triggering instruction sending unit, configured to send, to the other base station, a co-frequency carrier aggregation working mode triggering instruction for instructing the other base station to send the control information to the base station, before the control information receiving unit receives the control information .

 The base station according to claim 25, further comprising:

 a determining unit, configured to determine, after the control information sending unit sends the control information to the terminal, whether the reference signal measurement result sent by the terminal meets a preset co-frequency carrier aggregation working mode stop condition;

 And a stop instruction transmitting unit, configured to send, to the terminal, an intra-frequency carrier aggregation operation mode stop instruction for instructing the terminal to release the connection between the other base station and the terminal when the determination result obtained by the determining unit is YES.

 28. A terminal, comprising:

 a triggering instruction receiving unit, configured to receive a co-frequency carrier aggregation working mode triggering instruction that is sent by the second base station and carries a cell identifier;

 a connection unit, configured to: after the trigger instruction receiving unit receives the instruction, maintain a connection between the terminal and the second base station, and establish a connection between the terminal and a first base station of the cell that covers the cell identifier indication ;

 a control information receiving unit, configured to receive, according to a connection between the terminal and the second base station, the control information sent by the second base station, and establish a connection between the terminal and the first base station based on the connection unit Receiving control information sent by the first base station.

 The terminal according to claim 28, further comprising:

 a measurement result sending unit, configured to obtain a reference signal measurement result, and send the reference signal measurement result to the second base station;

 a stop instruction receiving unit, configured to receive a co-frequency carrier aggregation working mode stop instruction that is fed back by the second base station according to the reference signal measurement result sent by the measurement result sending unit;

 And a connection release unit, configured to release the connection between the terminal and the first base station according to the instruction received by the stop instruction receiving unit.

 The terminal according to claim 28, further comprising:

 a measurement result sending unit, configured to obtain a reference signal measurement result, and send the reference signal measurement result to the first base station;

 a stop instruction receiving unit, configured to receive a co-frequency carrier aggregation working mode stop instruction that is feedback by the first base station according to the reference signal measurement result sent by the measurement result sending unit;

And a connection release unit, configured to release a connection between the terminal and the second base station according to the instruction received by the stop instruction receiving unit.

The terminal according to claim 28, further comprising:

 And an updating unit, configured to update a related configuration of the terminal according to the control information received by the control information receiving unit.

The terminal according to claim 31, wherein the control information receiving unit is further configured to receive, according to a connection between the terminal and the first base station established by the connecting unit, control information sent by the first base station. ;

 The updating unit is specifically configured to: update the related configuration of the terminal according to the control information respectively sent by the first base station and the second base station received by the control information receiving unit.