CN101505510A - Method for handover between macro cell and private cell, macro network system - Google Patents

Abstract

The embodiment of the present invention relates to the field of wireless communication, and discloses a method and device for switching between a macro cell and a private cell, wherein a method for switching between a macro cell and a private cell includes the following steps: the macro network obtains information of the private network ; According to the information, the macro network configures a measurement control message of the terminal; and according to the measurement control message, perform handover from the macro network to the private network. The embodiment of the present invention can realize that the UE that leaves the private cell can quickly switch back to the private cell after the user returns to the coverage of the private cell, so as to enjoy better services and higher cost performance brought by the private cell.

Description

Handover method from macro cell to private cell and its macro network system

technical field

The invention relates to the field of wireless communication, in particular to a technology for switching between a macro cell and a private cell.

Background technique

Femto cell/Home eNB/CSG cell/AP can be collectively referred to as a private cell, which means a class of network side nodes that are similar in function to macro cells and macro base stations (can provide wireless access services for terminals), but there are differences . The private cell radio access technology (RAT) may be: LTE, UTRAN, GERAN, HSPA+, CDMA, WiMAX, etc.

Private communities have the following characteristics:

1. The coverage area is small;

2. Mainly indoor coverage;

3. Compared with the macro base station, its equipment cost is lower;

4. Its ownership often does not belong to mobile network operators, but to private individuals, family owners or certain non-mobile network companies, such as entertainment business companies, restaurants, and bars. This feature determines that the network deployment/maintenance of private cells does not require mobile network operators to spend as much as macro base stations. At the same time, to access a private cell, it is often necessary to obtain a special access permission. Users allowed to access the cell belong to the so-called "similar subscriber group" (CSG), and usually have a license in the database of a certain node on the network side that authorizes the UE to use a certain (some) CSG cell information, and when the UE accesses the CSG cell, it may check the database information to confirm whether the UE is allowed to access.

Therefore, compared with the macro cell, the private cell has better coverage effect (indoor), lower tariff, and richer services.

However, in a macro cell, since there are many private cells, if the information of the private cells is included in the neighbor cell list (NCL) information in the broadcast message of the macro cell, too many air interface resources will be occupied. Therefore, how to let the UE find its own private cell in the macro cell, the usual method is that there is no need to have the handover from the macro cell to the private cell. That is to say, after the user enters the IDLE (idle) state from the ACTIVE (activated) state, if he finishes making a call, he will enter a private cell through cell reselection. Initiated from a private cell. However, this method means that during a call of the user, if the user leaves the private cell for a short time (such as going to the balcony or yard in the middle), the UE is switched to the macro cell at this time, and when the user returns to the private cell When the effective coverage of the mobile phone (such as returning to the house), the caller cannot switch back to the private cell, but can only continue to receive the service of the macro cell until the call ends. That means that even if they return to the coverage area of the private cell, they will not be able to get the tariff and performance discounts provided by the private cell, which is a loss for the user.

Contents of the invention

The main technical problem to be solved by the embodiments of the present invention is to provide a method for switching between a macro cell and a private cell and a macro network system, which can enable the UE to quickly switch back to the private cell.

In order to solve the above technical problems, an embodiment of the present invention provides a handover method from a macro cell to a private cell, including:

The macro network obtains the information of the private network;

Configuring the measurement control message of the terminal according to the information macro network;

Handover from the macro network to the private network is performed according to the measurement control message.

In order to solve the above technical problems, the embodiment of the present invention provides a macro network system, including:

The receiving unit is used for the macro network to obtain the information of the private network;

The configuration unit is configured to configure the measurement control message of the terminal according to the information macro network;

A switching unit, configured to switch from the macro network to the private network according to the measurement control message:

Compared with the prior art, the embodiment of the present invention has the main difference and its effect that the macro network obtains the information of the private network; configures the measurement control message of the terminal according to the information; Network switching. Therefore, the UE that leaves the private cell can quickly switch back to the private cell after the user returns to the coverage of the private cell, so as to enjoy better services and higher cost performance brought by the private cell. In addition, according to the macro network configuration measurement control message for the terminal, the terminal can let the UE initiate the measurement of the private cell at an appropriate time, which not only saves the power consumption of the UE in the measurement, but also allows the UE to switch when there is a suitable private cell Immediately switch to a private cell to enjoy better services and higher cost performance brought by the private cell.

Description of drawings

FIG. 1 is a first scene diagram of a UE switching from a macro cell to a private cell according to an embodiment of the present invention;

FIG. 2 is a second scene diagram of a UE switching from a macro cell to a private cell according to an embodiment of the present invention;

FIG. 3 is a third scene diagram of a UE switching from a macro cell to a private cell according to an embodiment of the present invention;

FIG. 4 is a flowchart of a method for switching from a macro cell to a private cell according to an embodiment of the present invention;

5 is a schematic diagram of a method for a macro network to obtain private network information provided by a private network according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a trigger mechanism for specifically setting UE measurement in FIG. 5;

FIG. 7 is another schematic diagram of specifically setting the trigger mechanism for UE measurement in FIG. 5;

FIG. 8 is another schematic diagram of specifically setting the trigger mechanism for UE measurement in FIG. 5;

FIG. 9 is a schematic diagram of transferring private network information during E-UTRAN internal handover according to an embodiment of the present invention;

Fig. 10 is a schematic diagram of transferring private network information when switching before other 3GPP RATs according to the embodiment of the present invention;

Fig. 11 is another schematic diagram of transferring private network information when switching between other 3GPP RATs in the embodiment of the present invention;

FIG. 12 is a schematic diagram of transferring private network information when switching between the private network UTRAN and the macro network E-UTRAN according to the embodiment of the present invention;

FIG. 13 is another schematic diagram of transferring private network information when switching between the private network UTRAN and the macro network E-UTRAN according to the embodiment of the present invention;

FIG. 14 is a schematic diagram of transferring private network information when switching between the private network E-UTRAN and the macro network GERAN according to an embodiment of the present invention;

FIG. 15 is another schematic diagram of transferring private network information when switching between the private network E-UTRAN and the macro network GERAN according to the embodiment of the present invention;

FIG. 16 is a schematic diagram of transferring private network information when switching between the private network GERAN and the macro network E-UTRAN according to the embodiment of the present invention;

FIG. 17 is a schematic diagram of a terminal providing private network information in an embodiment of the present invention;

FIG. 18 is a schematic diagram of a terminal and a CN providing private network information in an embodiment of the present invention;

FIG. 19 is another schematic diagram of private network information provided by a terminal and a CN in an embodiment of the present invention;

FIG. 20 is a schematic diagram of CN providing private network information in an embodiment of the present invention;

FIG. 21 is a schematic diagram of devices of a macro network system according to an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

In the embodiment of the present invention, the handover of the UE from the macro cell to the private cell can be aimed at a variety of different scenarios, as shown in Figure 1, Figure 2, and Figure 3, wherein:

As shown in Figure 1, after UE initiates services in private cell 2, it switches to macro cell 1, and finally switches back to private cell 2, or after UE initiates services in private cell 31 in private network 3, it switches to macro cell 1, and finally switch back to the private cell 32; or, after the UE initiates a service in the private cell 31 in the private network 3, it switches to the macro cell 1, then switches to the macro cell 4, and finally switches back to the private cell In cell 32;

As shown in Figure 2, UE initiates services in macro cell 1 or is switched from other macro cells to macro cell 1, and then switches back to private cell 32 in private network 3, or UE initiates services in macro cell 1 and switches to Switch back to the private cell 32 in the private network 3 after entering another macro cell 4;

As shown in Figure 3, macro cell 1 and macro cell 2 cover a private network at the same time, and the private network includes private cells 1, 2, 3, and 4, and the situation of UE in the entire network is as follows: Step 1 UE Initiate business in private cell 1; step 2 switch to macro cell 2; step 3 enter private cell 2; step 4 return to macro cell 2; step 5 enter private cell 3 or macro cell 1; step 6 enter macro cell Community 1; step 7 to enter private community 4.

The scenarios in Figures 1 to 3 are just examples, and are not actually limited to the above scenarios. In the above scenarios, when a macro cell is handed over to a private cell, the macro cell will not carry its coverage or Surrounding private cell information, that is, the UE cannot rely on the broadcast message of the macro cell to search for nearby private cells. Moreover, even if the UE knows that the private cell is under or near the coverage of a certain macro cell, when to initiate measurement and how to trigger the macro cell to configure measurement control parameters cannot be resolved. Furthermore, if the UE continuously searches for the private cell, it will consume more power and affect the service of the UE in the macro cell. A certain cost is required for the macro cell to allocate the measured GAP to the UE, which will affect the resource scheduling of the macro cell and cause interference to other UEs. Therefore, the technical problems to be solved by the embodiments of the present invention are as follows: 1. Allow the UE that leaves the private cell (enters the macro cell) to switch back to the private cell quickly after the user returns to the coverage area of the private cell to enjoy the private cell. Come for better service and better value for money. 2. It is necessary to allow the UE to initiate the measurement of the private cell at an appropriate time—that is, to prevent the UE from consuming too much power for measurement, and not to allow the UE to stay in the macro cell for a long time when there is a suitable private cell that can be switched.

In order to enable the UE to quickly switch back to the private cell, the first embodiment of the present invention is shown in Figure 4, a method for switching from a macro cell to a private cell includes the following steps:

Step 41, the macro network obtains the information of the private network;

Step 42, configure the measurement control message of the terminal according to the information macro network;

Step 43, perform handover from the macro network to the private network according to the measurement control message.

Among them, in step 41 and step 42, the macro network obtains the information of the private network and configures the terminal according to the information, including four embodiments. Among them, the macro network receives the information of the private network and provides the information of the private network in the first embodiment, as shown in FIG. 5 After the UE is handed over from the private cell to the macro cell, the private network provides the macro cell in the macro network with the private cell information and other relevant information that the UE is allowed to access, specifically including the following steps:

Step 51, setting a trigger mechanism for measurement;

Step 52, the private network transmits the private cell list information and the macro cell list to the macro network, where there is no X2 interface between the private cell and the macro cell, the private cell sends the private cell list information and the macro cell list to the CN side, the The process is merged into the handover flow;

Step 53, the CN side sends the private cell list information and the macro cell list information to the macro cell; similar to 52, this process can be incorporated into the handover process;

Step 54, the UE switches to the macro cell;

Step 55, the macro network configures UE measurement according to the private cell list information and the macro cell list.

Wherein, setting the triggering mechanism of the measurement in step 51 may include multiple embodiments, wherein embodiment 1 is triggered by setting a timer, and the specific setting methods include but are not limited to the following four types:

The first one: when the UE leaves the private cell and enters the macro cell, a timer Timer-A is started. Within a certain time T1, such as T1=10 minutes, the UE will continuously search and measure the private cell. If the UE is in the IDLE state, the timer Timer-A needs to be set inside the UE; if the UE is in the ACTIVE state, the timer Timer-A can be located inside the UE or inside the macro cell. The cell sends measurement control to the UE to trigger the UE to measure the private cell. When the Timer-A expires, the search for the private cell is abandoned, so as to prevent excessive battery consumption of the UE.

The second type: when the UE leaves the private cell and enters the macro cell, a timer Timer-A is started, and within a certain time T1, such as T1=10 minutes, the UE will continuously search and measure the private cell. If the UE is in the IDLE state, the timer Timer-A needs to be set inside the UE; if the UE is in the ACTIVE state, the timer Timer-A can be located inside the UE or inside the macro cell. The cell sends measurement control to the UE to trigger the UE to measure the private cell. When the UE is close to the private network and detects the signal of the private cell, but the signal is not good, the timer Timer-A is restarted to increase the search duration. Even if the time of T1 is about to end, the timer Timer-A needs to be restarted.

The third way is that when the UE leaves the private cell and enters the macro cell, a timer Timer-A is started. Within a certain time T1, such as T1=10 minutes, the UE will continuously search and measure the private cell. If the UE is in the IDLE state, the timer Timer-A needs to be set inside the UE; if the UE is in the ACTIVE state, the timer Timer-A can be located inside the UE or inside the macro cell. The cell sends measurement control to the UE to trigger the UE to measure the private cell. When the UE ends the call, that is, changes from ACTIVE to IDLE state, restart the timer so that the IDLE state can return to the private cell in time, even if the time of T1 is about to end, the timer Timer-A needs to be restarted.

The fourth type: two timers Timer-A and Timer-B are set. The difference from the first type is that there is a Timer-B for controlling the time interval (time T2) of the measurement, that is, in the time range of T1 (by Timer-A calculation), the UE's measurement of the private cell is not periodically evenly distributed, but changes, and the change rule can be configured in advance by the private network, or flexibly controlled by the macro cell according to the location of the UE.

Wherein, in step 51 setting the trigger mechanism of the measurement, embodiment 2 is to set the trigger mechanism through the TA value or the time observation difference. Among them, TA can be used as a measurement scale for the distance from the UE to the base station. The granularity is about 78 meters, and the granularity is the accuracy. In this way, the position of the UE can be obtained as a circle centered on the antenna of the serving cell. The time observation difference is the arrival time difference of signals of two cells measured by the UE, which requires the two cells to be synchronized. If the UE is between two cells, the measured time difference is 0. When the UE is closer to one cell, the signal of that cell arrives earlier, and the channel of the other cell arrives later. Therefore, it can be obtained that the position of the UE is on a hyperbola with the base stations of the two cells as the focus. As shown in FIG. 6, when the UE is in an active state, when the UE combines the TA value measurement of the serving cell and the time observation difference of the neighboring cell to locate the UE. For TA, it is first necessary to know the TA value x of the location of the private eNB. When the UE moves and its TA value is close to x, it is considered that the UE is close to the private eNB, so that it can be located in the area in Figure 6 as a trigger 1 and area 2. For the UE in the active state, both eNB1 and UE know the TA, and both can measure whether the size of the TA reaches a certain range, and the TA value of the location of the private eNB relative to the eNB1, to trigger the measurement of the private eNB by the UE. However, the UE measurement is more accurate and can correspond to two points. If the downlink time difference of the eNB2 signal is assisted, this time difference is similar to the role of TA. It also requires the UE to save the location of the private eNB, eNB1 and eNB2. The time difference of the downlink signal is the difference between the time when the signal is sent from eNB1 and arrives at the location of the private eNB and the time when the signal is sent from eNB2 and arrives at the private eNB. The above method requires eNB1 and eNB2 to be synchronized with the network. As shown in Figure 7, when the UE is in the IDLE state, when the UE locates the UE based on the time observation differences of the adjacent cells eNB1, eNB2, and eNB3, it must first know the observation time difference of the location of the private eNB relative to each neighboring cell, so that when When the UE approaches area 1, it can trigger the UE/macro cell to take further actions to locate area 1 in the figure. The specific triggering process is roughly the same as that shown in FIG. 6 , except that an eNB3 is added in FIG. 7 to assist in making the positioning of the private eNB more accurate, which can correspond to a range of a point.

Among them, in step 51 setting the trigger mechanism of the measurement, embodiment 3 is set on the human-machine interface of the UE through a human-triggered mechanism, adding options that can be controlled by humans, such as a certain button or a certain option in the menu, Specific methods may include at least one of the following:

First, when the user approaches the private cell, the UE can trigger the private cell after getting the "artificial" trigger, which is equivalent to unlocking the car through wireless remote control, causing the originally "resting" private cell to start working , as follows to send broadcast signals and increase coverage strength;

The second type is that after the UE is "artificially" triggered, it directly tries to measure the neighboring cells of the private eNB. It can be based on the existing private cell information inside the UE, or perform a full frequency band search. When a suitable private cell that is allowed to be accessed is found, it will report to the macro cell and trigger the macro cell to switch it to the CSG cell;

In the third type, after the UE is "artificially" triggered, the UE first reports to the macro cell, and the macro cell then configures the UE to measure private cells, such as assigning GAP. When a suitable private cell that is allowed to be accessed is found, it will report to the macro cell and trigger the macro cell to switch to the private cell. As for when the UE is triggered, the UE notifies the macro cell of the measurement of the private cell. Regardless of whether the macro cell has private cell information, it will allocate an appropriate GAP to the UE for measurement. When the UE finds a suitable private cell, it will report to the macro cell. , the macro cell then decides whether it can be handed over.

Wherein, in step 51, setting the measurement triggering mechanism in embodiment 4 is based on the triggering mechanism based on the range of the signal quality/strength of the macro cell. As shown in FIG. 8 , the triggering mechanism is similar to Embodiment 2, but the difference is that the approximate location of the UE is determined through a range obtained by the UE measuring the quality or strength of adjacent cells. First, the UE or the serving macro cell should save the signal strength or quality information of the adjacent cell where the private eNB is located, and second, the measured value close to the private cell should satisfy the following relationship:

The value of RSSI (Received Signal Strength Indicator, Received Signal Strength Indicator) is between RSSI-L (lowest value) and RSSI-H (highest value);

The value of RSRP (Reference Signal Received Power, reference signal received strength) is between RSRP-L and RSRP-H;

The value of RSCP (Received Signal Code Power, received signal code strength) is between RSCP-L and RSCP-H.

As shown in Figure 8, only one cell is shown in the figure, and a general location information of the HNB (a circle determined by two dashed lines) can be determined through the range of a certain measurement quantity, and the signal of the neighboring cell can be added. The determination is more precise. For example, three adjacent cells can basically determine a "point" where the HNB is located through three circles. The specific trigger mechanism is roughly the same as that in Figure 6, except that the circle can be triggered by eNB1 discovery In addition to measurement, all methods can use UE's usual measurement, and then compare the internally saved time difference and TA value. Once the parameter range matches, the UE will be triggered to measure the private cell, or the UE will be triggered to notify eNB1 to measure the UE. configuration.

Wherein, in step 51 setting the triggering mechanism of the measurement, embodiment 5 is realized by triggering based on the GPS position. Determining the position of the UE through GPS is a more accurate implementation. But installing GPS is relatively expensive. The specific implementation method is to first determine the coverage that the HNB can achieve. Once the UE enters this range, a series of UE measurements, search for HNB work, or communication actions between the UE and the macro cell can be triggered. For example, the UE uploads the white list to the macro cell, or then Some actions of the HNB are triggered by the UE or the macro cell, such as waking up the HNB, enhancing its signal strength, sending broadcast information, and so on.

Among them, in step 52, the private network provides private network information to the macro network as private cell information or private cell white list, and this information has different transmission methods in different architectures. Three embodiments of switching private cells between RATs and between 3GPP and non-3GPP systems are described:

Embodiment 1: Transfer private network information during E-UTRAN internal handover as shown in Figure 9, wherein both the private cell network and the macro cell network belong to E-UTRAN, and the private cell network and the macro cell network are the same MME and SGW, in The internal switching of CN side transit includes the following steps:

Step 1: The private cell network makes a handover decision;

Step 2: The private cell network sends a relocation request message to the MME, wherein the relocation request message carries private network information;

Step 3: After receiving the relocation request message of the private network, the MME sends a relocation request message to the macro cell network, wherein the relocation request message carries information of the private network;

Step 4: After receiving the relocation request sent by the MME, the macro cell network sends a relocation request ACK (Acknowledge, response) to the MME;

Step 5: MME sends a relocation command to the private cell network;

Step 6: After receiving the relocation command, the private cell network sends a handover command to the UE;

Step 7: UE leaves the private cell network and synchronizes to the macro cell network;

Step 8: The UE sends a handover confirmation to the macro cell network;

Step 9: After receiving the handover confirmation, the macro cell network sends a relocation completion to the MME;

Step 10: MME sends an update Bearer (bearer update request) request to SGW;

Step 11: SGW sends update Bearer response to MME;

Step 12: The MME sends the release resource to the private cell network.

Among them, the handover process inside the E-UTRAN is not only the handover on the CN side shown in Figure 9, but also the handover process of the X2 interface, which is different from the above in that the private cell network sends a handover request message to the macro cell network directly carries the information of the private cell network.

Embodiment 2 When switching between other 3GPP RATs, transfer private network information as shown in Figure 10, wherein the private cell network can be E-UTRAN, the macro cell network can be UTRAN or GERAN, or the private cell network can be UTRAN, and the macro cell network It is E-UTRAN, wherein if the private cell network is E-UTRAN and the macro cell network is UTRAN, the private network cell can transmit the private network information to the macro cell network during the handover preparation stage, see steps 2 and 3 in Figure 10 for details , 4, 5, or only in steps 2, 3, and 5, the private cell network information can also be transmitted to the macro cell network during the handover execution phase, see steps 3, 3a, and 3b in Figure 11 for details:

Steps 2, 3, 4, and 5 in Figure 10 are specifically:

Step 2: The private cell network (source eNodeB) sends a handover request message to the source mobility management entity MME, wherein the message in the handover request carries private network information;

Step 3: After receiving the handover request message, the source MME sends a forward relocation request message to the target SGSN, wherein the relocation request message carries private network information;

Step 4: The target SGSN sends a PDP context request message to the target service gateway, wherein the context request message carries private network information;

Step 4a: The target service gateway sends a PDP context creation response to the target SGSN, wherein the context response carries private network information;

Step 5: The target SGSN sends a relocation request message to the target RNC, wherein the relocation request message carries private network information;

Step 5a: The target RNC sends a relocation request to the target SGSN, wherein the relocation request carries private network information.

Among them, steps 3, 3a, and 3b in Figure 11 are specifically:

Step 3: The private cell network (source eNodeB) sends a forward context message to the source MME, where the message carries private network information;

Step 3a: The source MME sends a forward SRNS context message to the target SGSN, wherein the message carries private network information;

Step 3b: The target SGSN sends a forward SRNS context message to the target RNC, wherein the message carries private network information.

The private cell network is UTRAN, and the macro cell network is E-UTRAN. The private network information sent to the macro cell network can be transmitted in the handover preparation phase as shown in Figure 12; or in the handover execution phase as shown in Figure 13, where in Figure 12 Steps 2, 3, 4, and 5 are specific steps for transferring private network information:

Step 2: the source RNC sends a relocation request message to the source SGSN, wherein the message carries the information of the private network;

Step 3: The source SGSN sends a forward relocation request message to the target MME, wherein the message carries private network information;

Step 4: The target MME sends a create BEARER request message to the target service gateway, where the message carries private network information;

Step 4b: The target service gateway sends a create BEARER request response to the target MME, where the response carries private network information;

Step 5: The target MME sends a handover request message to the target eNodeB, where the message carries private network information.

Among them, steps 3 and 3c in FIG. 13 are specific steps of transferring private network information:

Step 3: the source RNC sends a forward SRNS context message to the source SGSN, wherein the message carries the information of the private network;

Step 3c: The source SGSN sends a forward SRNS context message to the target eNodeB, wherein the message carries private network information.

The private cell network is E-UTRAN, and the macro cell network is GERAN. The private network information sent to the macro cell network can be transmitted in the handover preparation phase as shown in Figure 14; or in the handover execution phase as shown in Figure 15, where in Figure 14 Steps 2, 3, and 5 are specific steps for transferring private network information:

Step 2: The source eNodeB sends a handover request message to the source MME, wherein the message carries private network information;

Step 3: The source MME sends a forward relocation request message to the target SGSN, wherein the message carries private network information;

Step 5, the target SGSN sends a PS handover request message to the target BSS, wherein the message carries private network information.

Among them, steps 3 and 3a in Figure 15 are specific steps for transferring private network information:

Step 3: The source eNodeB sends a forward SRNS context message to the source MME, wherein the message carries private network information;

Step 3a: The source MME sends a forward SRNS context message to the target SGSN, where the message carries private network information.

The private cell network is GERAN, and the macro cell network is E-UTRAN. The private network information sent to the macro cell network can be transmitted in the handover preparation stage as shown in Figure 16; steps 2, 3, and 5 in Figure 16 are specific Steps to pass private network information:

Step 2: The source BSS sends a PS handover request message to the source SGSN, wherein the message carries private network information;

Step 3: The source SGSN sends a forward relocation request message to the target MME, wherein the message carries private network information;

Step 5: The target MME sends a handover request message to the target eNodeB, where the message carries private network information.

Wherein Embodiment 3 is transmitted before 3GPP and non-3GPP, specifically, if the private cell network is a 3GPP network and the macro cell network is a non-3GPP network, the handover from the private cell network to the macro cell network needs to be performed from the 3GPP eNB of the private cell, or The RNC or the BSS first transmits the private cell information to the CN side, and then transmits it to a non-3GPP network-side macro cell node, such as a WiMAX base station.

Among them, if the private cell network is a non-3GPP network and the macro cell network is a 3GPP network, the handover from the private cell network to the macro cell network needs to first transmit the private cell information to the CN side from the base station of the private cell, such as WiMAX, and then pass it on to the non-private cell network. 3GPP network side macro cell node eNB, or RNC, or BSS.

Wherein, in step 52, the private network provides private network information to the macro network as private cell information or private cell white list, wherein the private cell information includes a list of private cell information and a list of information of the macro cell where the private cell is located.

Wherein, the private cell information list includes information used to control terminal measurement and information used to trigger measurement of private cells, wherein the information used to control UE measurement is cell ID and any one of the following information: RAT type, center frequency , offset value (Qoffset), hysteresis (Qhyst), DRX information, priority information, minimum UL/DL signal strength/quality threshold (for selection/handover to the private cell), type of measurement report, etc.

The relevant information used to trigger the UE to measure the private cell: the timing information of the measurement; the timing advance (TA, Timing Advance); through the man-machine interface (Man Machine Interface); artificially trigger the measurement method of the terminal to the CSG cell, such as : Install a separate button on the terminal; the geographical location of the private cell corresponds to the signal strength/quality range of the surrounding macro cells.

The macro cell list information where the private cell is located means that all or part of the private cell is within the coverage of the macro cell. A list formed by such macro cells, that is, the list information of the macro cells where the private cells are located.

The private cell white list mainly includes private cell identifiers, (multiple) CSG cell identifiers, and RAT type and frequency band information used by each private cell.

Among them, in step 41 and step 42, the macro network obtains the information of the private network and configures the terminal according to the second embodiment. The macro cell directly requests the CSG network for the UE-related (with access rights) CSG cell information, The process may be triggered by a UE with CSG access capability initiating a service in a macro cell or handing over to a macro cell. Afterwards, the macro cell actively obtains the CSG cell information from the CSG network. Or, after the macro cell receives part of the private cell information provided by the terminal or the CN, it directly obtains the private network information from the private cell according to the part of the private cell information, wherein the part of the private cell information includes cell identification and interface address information.

Among them, in step 41 and step 42, the macro network obtains the information of the private network and configures the terminal according to the third embodiment. The information of the private network is provided for the macro network to receive the terminal. As shown in FIG. 17, the UE is already in the macro cell In the network, and the macro cell network does not have UE-related private cell information, the macro cell needs to actively go to the private cell network to request UE-related private cell information. The macro cell is obtained from a private cell. However, how the macro cell triggers and configures the UE to measure the private cell needs to be triggered. Refer to the mechanisms in other embodiments, such as the timer started after the UE leaves the private cell, the discovery of the UE's own measurement, GPS positioning, and so on.

Step 171, the UE initiates a service in the private cell

Step 172, the private network transmits the private cell list information and the macro cell list to the UE;

Step 173, the private cell sends a handover request message to the CN side (such as MME);

Step 174, the CN side forwards the handover request message to the macro cell;

Step 175, the UE reports the private cell list information and the macro cell list to the macro network;

In step 176, the UE performs services in the macro cell.

Step 177: The macro cell configures UE measurement according to the private cell list information and the macro cell list information.

Among them, in step 41 and step 42 in Figure 4, the macro network obtains the information of the private network and configures the terminal according to the fourth embodiment of the information, the macro network receives the terminal and the CN side provides the information of the private network, as shown in Figure 18 and Figure 19 As shown, when a UE initiates a service in a certain macro cell, or when it is handed over to a certain macro cell, the CN may deliver the information of private cells that the UE can access to the macro cell. The private cell information may be in the range of some (some) TAs. During the interaction between the RAN and the CN side such as TAU (Tracking Area Update), RAU (Routing Area Update) or LU (Location Area Update) of the UE, the CN side sends it to the macro cell. After the macro cell obtains the CSG cell information, it can decide how to configure UE measurement according to whether the macro cell has relevant CSG cells that the UE can access. As shown in Figure 18, it specifically includes the following steps:

Step 191, the UE has services in the private cell;

Step 192, UE and CN signaling interaction: such as TAU and so on. Request private cell list information and macro cell list information from the CN side;

Step 193, the CN transmits part of the private cell list information and the macro cell list to the UE;

Step 194, after the UE switches to the macro cell, the UE reports to the macro cell: private cell list information and macro cell list;

Step 195, the macro cell configures the UE measurement according to the information configuration reported by the UE.

Step 196, the macro network configures UE measurement according to the private cell list information and the macro cell list.

As shown in Figure 19, it specifically includes the following steps:

Step 201, the UE initiates a service in a private cell;

Step 202, the private cell initiates a handover request to the macro cell through the CN;

Step 203, the CN sends part of the private cell list information and the macro cell list information to the macro cell;

Step 204: After accessing the macro cell, the UE reports (partial) private cell list information and the macro cell list to the macro cell;

Step 205, the UE continues its business in the macro cell;

Step 206, the macro network configures UE measurement according to the private cell list information and the macro cell list.

Among them, in step 41 and step 42, the macro network obtains the information of the private network and configures the terminal according to the information, and the fifth embodiment provides the information of the private network for the macro network to receive the CN side, as shown in FIG. 20 , specifically including the following steps:

Step 211, the UE initiates a service in the private cell;

Step 212, the private cell initiates a handover request to the macro cell through the CN;

Step 213, the CN sends the private cell list information and the macro cell list information to the macro cell;

Step 214, the UE continues its business in the macro cell;

Step 215, the macro network configures UE measurement according to the private cell list information and the macro cell list.

As shown in FIG. 21 , it is a schematic structural diagram of a macro network system, wherein the macro network system 20 includes:

The receiving unit 22 is used for the macro network to obtain the information of the private network;

The configuration unit 23 is configured to configure the measurement control message of the terminal according to the information macro network;

A switching unit 24, configured to switch from the macro network to the private network according to the measurement control message.

The information received by the receiving unit 22 is: the private network provides the information of the private network to the macro network; or the terminal provides the information of the private network to the macro network; or the CN side and the terminal provide the information of the private network to the macro network; Networks provides information about private networks. The specific receiving manner has been described in detail in the foregoing real-time manner and embodiment, and will not be repeated here.

In summary, in the embodiment of the present invention, the macro network obtains the information of the private network; according to the information, the macro network configures the measurement control message of the terminal; according to the measurement control message, it executes a handover from the macro network to the private network. Therefore, the UE that leaves the private cell can quickly switch back to the private cell after the user returns to the coverage of the private cell, so as to enjoy better services and higher cost performance brought by the private cell. In addition, according to the macro network configuration measurement control message for the terminal, the terminal can let the UE initiate the measurement of the private cell at an appropriate time, which not only saves the power consumption of the UE in the measurement, but also allows the UE to switch when there is a suitable private cell Immediately switch to a private cell to enjoy better services and higher cost performance brought by the private cell.

Although the present invention has been illustrated and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the present invention. The spirit and scope of the invention.

Claims (11)

1. A handover method from a macro cell to a private cell, comprising: The macro network obtains the information of the private network; Configuring the measurement control message of the terminal according to the information macro network; Handover from the macro cell in the macro network to the private cell in the private network is performed according to the measurement control message. 2. The handover method from a macro cell to a private cell according to claim 1, wherein the acquisition of private network information by the macro network specifically includes any of the following methods: The macro cell actively obtains from the private cell; The macro network receives information from the private network provided by the private network; or The macro network receives the information of the private network provided by the terminal; or The macro network receives the private network information provided by the CN side and the terminal; or The macro network receives the information of the private network provided by the CN side; or. 3. The method for switching from a macro cell to a private cell according to claim 2, wherein the specific method for the macro cell to actively obtain from a private cell is: The macro cell directly requests information about the private cell from the private network; or After receiving part of the private cell information provided by the terminal or the CN, the macro cell directly obtains the private network information from the private cell according to the part of the private cell information, wherein the part of the private cell information includes the cell identifier and interface address information. 4. The method for switching from a macro cell to a private cell according to claim 2, wherein the macro network receives the information of the private network provided by the private network and the specific operation steps are any of the following: When both the macro cell and the private cell belong to E-UTRAN, when the handover process of the S1 interface is performed, the macro network provides the information of the private network when it receives a relocation request from the private network, or when the handover process of the X2 interface is performed , the macro network provides private network information when it receives a handover request message from the private network; When both the macro cell and the private cell belong to the inter-RAT network between radio access technologies in 3GPP, the macro network receives the private network information provided by the private cell during the handover preparation phase or the handover execution phase; When the macro cell and the private cell switch between 3GPP and non-3GPP networks, the macro network receives the CN side and forwards the private cell to provide private network information. 5. The method for switching from a macro cell to a private cell according to claim 2, wherein the specific operation steps of the private network information provided by the macro network receiving terminal are: The macro network receives the private cell list information provided by the terminal and the list information of the macro cell where the private cell is located; or When the macro network receiving terminal finds that there is an accessible private cell under the coverage of the macro cell, it provides the information of the private cell with the access right to the macro cell. 6. The method for switching from a macro cell to a private cell according to claim 2, wherein the specific operation method for the macro network to receive the information of the private network provided by the CN side is: The macro network receives the private cell information that the terminal has access rights to when the TAU/RAU/LU or the macro cell initiates a specific request from the CN side. 7. The handover method from a macro cell to a private cell according to any one of claims 1 to 6, wherein the measurement control message of the macro network configuration terminal according to the information is a measurement trigger mechanism for the macro network configuration terminal , the specific configuration method is any of the following: Setting a timer, and starting the timer to measure the private cell when the terminal enters the macro cell from the private cell; Setting a timer, and restarting the timer when the terminal detects a private cell after exceeding the duration set by the timer; A timer is set, and the timer is restarted when the terminal changes from the activation state Active to the leisure state Idle; Set the first timer and the second timer. When the terminal leaves the private cell and enters the macro cell, the first timer is started to measure the private cell. Within the time range of the first timer, the second timer is started to measure the private cell aperiodically. sexual measurement; Set the time advance TA corresponding to the location of the private cell in the UE or the macro cell, or set the time observation difference TOD corresponding to the location of the private cell in the UE to each adjacent macro cell. When the location of the private cell is in the macro cell, the corresponding TA value and UE Or when the value saved in the macro cell is consistent; or when the UE finds that the TOD value of the adjacent macro cell is consistent with the TOD value of each adjacent macro cell corresponding to the location of the saved private cell, the UE will be triggered to measure the private cell. Set the control option on the man-machine interface of the terminal, and when the control option is triggered, the UE starts to measure the private cell; or trigger the UE to send an indication of "there is a private cell nearby" to the macro cell, causing the macro cell to configure a measurement control message to the UE , thus causing the UE to perform private cell measurement. The location of the terminal is obtained by measuring the quality or strength of the adjacent cell. The location of the private cell is within a certain range of downlink power or quality in its adjacent macro cell. If the UE has saved this range value in advance, then When moving near a private cell, the downlink power information or quality of the adjacent macro cell measured by the UE will enter this range, and then the measurement can be triggered. Set the coverage range of the private cell, and start measuring the private cell when the GPS monitoring terminal enters the range. 8. The handover method from a macro cell to a private cell according to any one of claims 1-6, wherein: The information of the private network is private cell information or private cell white list, wherein the private cell information includes private cell list information and list information of the macro cell where the private cell is located. 9. The handover method from a macro cell to a private cell according to claim 8, wherein the private cell information list includes information for controlling terminal measurement and information for triggering measurement of private cells. 10. A macro network system, comprising: The receiving unit is used for the macro network to obtain the information of the private network; The configuration unit is configured to configure the measurement control message of the terminal according to the information macro network; A switching unit, configured to switch from the macro network to the private network according to the measurement control message. 11. The macro network system according to claim 10, wherein the information obtained by the receiving unit is: The information that the macro cell actively obtains from the private cell; The macro network receives information from the private network provided by the private network; or The macro network receives the information of the private network provided by the terminal; or The macro network receives the private network information provided by the CN side and the terminal; or The macro network receives the information of the private network provided by the CN side.

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