WO2011097827A1

WO2011097827A1 - Method and device for interference coordination between different types of base stations

Info

Publication number: WO2011097827A1
Application number: PCT/CN2010/070684
Authority: WO
Inventors: 张路; 杨林; 尹菲; 杨涛
Original assignee: 上海贝尔股份有限公司; 阿尔卡特朗讯
Priority date: 2010-02-12
Filing date: 2010-02-12
Publication date: 2011-08-18
Also published as: CN102612854B; CN102612854A

Abstract

The present invention relates to the mobile communication technology, and more particularly to a method and device for interference coordination between different types of base stations in Heterogeneous Networks. According to one aspect of the present invention, there may be provided a method for providing service to a User Equipment (UE) in a mobile communication network, and the method includes the following steps: A. a first type of base station determines to perform a coordination about the access of said UE with a second type base station, and sends a signaling to said UE, which comprises a coordination indication message and a dedicated preamble for accessing the second type of base station quickly; B. said UE receives said signaling and initiates a random access procedure to said second type of base station based on said dedicated preamble; D. after achieving the synchronization with said second type of base station, said UE forwards said coordination indication message to said second type of base station. With the application of the method and device in the present invention, the interference coordination between different types of base stations in Heterogeneous Networks can be implemented quickly.

Description

Method and device for interference coordination between different types of base stations

The present invention relates to mobile communication technologies, and more particularly to techniques for interference coordination between different types of base stations in a heterogeneous network. Background technique

In the Long Term Evolution (LTE) system, when interference between macro base stations requires coordination, coordination-related signaling can be transmitted through the X2 interface or the S1 interface.

Heterogeneous Networks (ΗΤΝ) are a very important technology for enhancing the performance of a community system. A typical heterogeneous network scenario is the overlap of a macro base station signal and a microcell base station signal. The home base station is a typical microcellular base station. An important issue in heterogeneous networks is the interference problem between the two networks that overlap. It is very important to use dynamic coordination to resolve the interference between the two systems. The home base station has the characteristics of random deployment, so it is difficult to implement coordination between the macro base station and the micro cell base station through the X2 interface or the S1 interface. Moreover, through the respective gateways and the layer-by-layer forwarding of the core network, the signaling used for coordination between the macro base station and the micro-cell base station will suffer a very large delay, which has a very large impact on system performance. Summary of the invention

In order to overcome the above-mentioned deficiencies in the prior art, the present invention proposes a technical scheme for providing relaying by signaling by a user equipment to implement interference coordination between different types of base stations.

According to an aspect of the present invention, a method for providing a user equipment in a mobile communication network including at least one first type of base station and at least one second type of base station is provided, comprising the following steps: A. The class base station determines coordination with the access of the user equipment with a second type of base station, and sends a signaling to the user equipment, the signaling includes a coordination indication message and a second for fast access Class a dedicated preamble of the base station; B. the user equipment receives the signaling, and initiates a random access procedure based on the dedicated pre-direction to the second type of base station; D. when the user equipment obtains the second type After the synchronization of the base station, the coordination indication message is forwarded to the second type of base station.

According to another aspect of the present invention, a coordination apparatus for use in a first type of base station is provided, comprising: coordination determining means for determining between the first type of base station and a second type of base station Coordination related to access of the user equipment; signaling generating means, configured to generate a signaling, the signaling includes a coordination indication message and a dedicated preamble for quickly accessing the second type of base station; and a signaling sending device, The signaling is sent to the user equipment.

According to still another aspect of the present invention, an auxiliary coordination apparatus for use in a base station is provided, comprising: a preamble detection apparatus, configured to detect a dedicated preamble from a user equipment, the dedicated preamble being used for fast access to a base station And a resource allocation device, configured to allocate resources to the user equipment.

By employing the method and apparatus of the present invention, interference coordination can be quickly achieved between different types of base stations in a heterogeneous network. DRAWINGS

The system will be better understood with reference to the figures and description below. The components in the figures are not necessarily drawn to scale, but rather are used to illustrate the principles of a typical model. Throughout the drawings, like reference characters have

1 is a schematic diagram of a network structure in accordance with an embodiment of the present invention; FIG. 2 is a flow chart showing a method of providing a service to a user equipment in a mobile communication network according to an embodiment of the present invention;

Fig. 3 is a block diagram showing the structure of a coordination device according to an embodiment of the present invention; Fig. 4 is a view showing the configuration of an auxiliary coordination device according to an embodiment of the present invention. detailed description

FIG. 1 shows a schematic diagram of a network structure in accordance with one embodiment of the present invention. As shown As shown, the mobile communication network of this embodiment includes: a first type of base station 1, a user equipment 2, and a second type of base station 3. The basic object of the present invention is to solve the problem of interference coordination between different types of base stations. For example, but not limited to, the first type of base station 1 and the second type of base station 3 correspond to a macro base station or a micro cell base station, respectively.

Without loss of generality, the various embodiments described below are applied to LTE systems. Those skilled in the art should understand that the technical solutions in the present invention can also be applied to other systems.

2 shows a flow chart of a method of providing a service to a user equipment in a mobile communication network, in accordance with one embodiment of the present invention.

As shown, the mobile communication network in this embodiment includes at least one first type of base station 1, at least one second type of base station 3, and one user equipment 2. The method for providing service to the user equipment 2 in this embodiment includes the steps of: Sl, S2, S4.

The application scenario of this embodiment is as follows: Regarding the access service of the user equipment 2, the first type of base station 1 and the second type of base station 3 perform interference coordination. For example, but not limited to, the first type of base station 1 and the second type of base station 3 correspond to a macro base station or a micro cell base station, respectively. The scenario 1 of the present invention is as follows: The first type of base station 1 is a macro base station, and the second type of base station 3 is a micro cell base station, and communication between the user equipment 2 and the macro base station 1 is interfered by the signal of the micro cell base station 3. For example, but not limited to, the microcell base station 3 is a home base station. The flow of the method in this scenario will be described below with reference to FIG. 2.

In step S1, the macro base station 1 determines coordination with the femtocell base station 3 regarding access by the user equipment 2, and transmits a signaling to the user equipment 2, the signaling including a coordination indication message and for quick access A dedicated preamble into the microcell base station.

Specifically, step S1 includes the following sub-steps:

- Determine the steps for coordination. Specifically, the user equipment 2 transmits an interference report periodically or in a burst. When the interference report received by the macro base station 1 indicates that the interference signal from the microcell base station 3 is large, for example, the received power of the interference signal (at the user equipment 2) from the microcell base station 3 exceeds a predetermined threshold, the macro base station 1 determines that Coordination with access to the user equipment 2 is performed with the femtocell base station 3.

- The step of generating signaling. Specifically, the macro base station 1 generates a signaling, the signaling packet. Includes a coordination indication message and a dedicated preamble for fast access to the femtocell base station. In this embodiment, the preambles used in the system are divided into at least two groups, including a set of dedicated preambles for fast access to the microcell base station. Typically, the set of dedicated preambles has a higher priority and the femtocell will preferentially allocate resources for user equipment that initiates access based on a dedicated preamble.

- The step of signaling. The macro base station 1 transmits the generated signaling including the coordination indication message and the dedicated preamble to the user equipment 2.

In step S2, the user equipment 2 receives the signaling sent by the macro base station 1, identifies the information in the signaling, and initiates the access based on the dedicated pre-directed microcell base station 3 carried in the signaling.

Specifically, the user equipment 2 will listen to the broadcast information of the microcell base station 3 to acquire configuration information of the microcell base station 3, including random access channel resources corresponding to the dedicated preamble. User equipment 2 will then transmit this dedicated preamble on the random access channel resource corresponding to this dedicated preamble.

In step S4, after the user equipment 2 obtains synchronization with the microcell base station 3, that is, after the user equipment 2 accesses the connection with the femtocell base station 3, the user equipment 2 will receive the signaling from the macro base station 1. The identified coordination indication message is forwarded to the microcell base station 3.

When the micro cell base station 3 receives the coordination indication information, it will provide services for its user equipment according to the indication of the coordination indication message, thereby avoiding interference between the two types of base stations.

If the dedicated preamble is not used, the user is likely to use the existing Random Access Channel (RACH) in the existing LTE system, and the user equipment may initiate access due to collision. Failure and extended access time affect the coordination process between base stations.

According to an embodiment of the present invention, there is a step S3 (not shown) between the above steps S2 and S4. In step S3, the femtocell 3 will detect the dedicated preamble transmitted by the user equipment 2 and allocate resources to the user equipment 2.

Specifically, after detecting the dedicated preamble sent by the user equipment 2, the femtocell 3 transmits a physical layer random access response message to the user equipment 2, including the allocated resource (grant) and Timing Advance (TA). Upon receiving the assignment After the resource and timing advance, the user equipment 2 obtains synchronization with the microcell base station 3. According to an embodiment of the present invention, in step S1, the signaling including the coordination indication message and the dedicated preamble generated by the macro base station 1 may be a medium access control layer (MAC layer) signaling, or may be a radio resource control. Layer (RRC layer) signaling. The reliability of the radio resource control layer signaling is higher than that of the medium access control layer signaling, but the latter has less processing time in the delivery process than the former. When the signaling including the coordination indication message and the dedicated preamble is the medium access control layer signaling, a compromise can be made in the reliability and processing time of the signaling transmission.

According to an embodiment of the present invention, the system may also configure a dedicated physical layer resource corresponding to the dedicated preamble to avoid collision when the user accesses. Then, in step S1, the signaling generated by the macro base station 1 further includes indication information of the dedicated physical layer resource corresponding to the dedicated preamble. In step S2, after receiving the signaling sent by the macro base station 1 and identifying the information in the signaling, the user equipment 2 will transmit the dedicated preamble using the dedicated physical layer resource corresponding to the dedicated preamble. The second scenario of the present invention is as follows: The first type of base station 1 is a microcell base station, and the second type of base station 3 is a macro base station, and communication between the user equipment 2 and the microcell base station 1 is interfered by the signal of the macro base station 3. For example, but not limited to, the microcell base station 1 is a home base station. The flow of the method in this scenario will be described below with reference to FIG. 2.

In step S1, the microcell base station 1 determines coordination with the macro base station 3 regarding access by the user equipment 2, and transmits a signaling to the user equipment 2, the signaling including a coordination indication message and for quick access A dedicated preamble to the macro base station.

Specifically, step S1 includes the following sub-steps:

- Determine the steps for coordination.

For example, user equipment 2 sends interference reports periodically or in a burst. When the interference report received by the microcell base station 1 indicates that the interference signal from the macro base station 3 is large, for example, the received power of the interference signal from the macro base station 3 (at the user equipment 2) exceeds a predetermined threshold, the microcell base station 1 determines that Coordination with access to the user equipment 2 is performed with the macro base station 3.

As another example, the microcell base station 1 can detect interference from other base stations by itself. when When the microcell base station 1 detects that the interference signal from the macro base station 3 is large, the microcell base station 1 determines the coordination with the macro base station 3 regarding the access of the user equipment 2.

- The step of generating signaling. Specifically, the femtocell base station 1 generates a signaling including a coordination indication message and a dedicated preamble for fast access to the macro base station. In this embodiment, the preambles used in the system are divided into at least two groups, including a set of dedicated preambles for fast access to the macro base station. Generally, the set of dedicated preambles has a higher priority, and the macro base station will preferentially allocate resources for user equipments that initiate access based on the dedicated preamble.

- The step of signaling. The microcell base station 1 transmits the generated signaling including the coordination indication message and the dedicated preamble to the user equipment 2.

In step S2, the user equipment 2 receives the signaling sent by the microcell base station 1, identifies the information in the signaling, and initiates access based on the dedicated pre-directed macro base station 3 carried in the signaling.

Specifically, the user equipment 2 will listen to the broadcast information of the macro base station 3 to acquire the configuration information of the macro base station 3, including the random access channel resources corresponding to the dedicated preamble. User equipment 2 will then transmit this dedicated preamble on the random access channel resource corresponding to this dedicated preamble.

In step S4, after the user equipment 2 obtains synchronization with the macro base station 3, that is, after the user equipment 2 accesses the connection with the macro base station 3, the user equipment 2 identifies from among the signaling received by the microcell base station 1. The coordinated indication message is forwarded to the macro base station 3.

After receiving the coordination indication information, the macro base station 3 will provide services for its user equipment according to the indication of the coordination indication message to avoid interference between the two types of base stations.

According to an embodiment of the present invention, there is a step S3 (not shown) between the above steps S2 and S4. In step S3, the macro base station 3 will detect the dedicated preamble transmitted by the user equipment 2 and allocate resources to the user equipment 2.

Specifically, after detecting the dedicated preamble sent by the user equipment 2, the macro base station 3 sends a physical layer random access response message to the user equipment 2, including the allocated resource (grant). And timing advance (TA). After receiving the allocated resources and timing advance, the user equipment 2 obtains synchronization with the macro base station 3.

According to an embodiment of the present invention, in step S1, the signaling including the coordination indication message and the dedicated preamble generated by the femtocell 1 may be media access control layer signaling or radio resource control layer signaling. . The reliability of RRC signaling is higher than that of media access control layer signaling, but the latter has less processing time in the delivery process than the former. When the signaling including the coordination indication message and the dedicated preamble is the medium access control layer signaling, a compromise can be made in the reliability and processing time of the signaling transmission.

According to an embodiment of the present invention, the system may also configure a dedicated physical layer resource corresponding to the dedicated preamble to avoid collision when the user accesses. Then, in step S1, the signaling generated by the microcell base station 1 further includes indication information of the dedicated physical layer resource corresponding to the dedicated preamble. In step S2, after receiving the signaling sent by the femtocell 1 and identifying the information in the signaling, the user equipment 2 will transmit the dedicated preamble using the dedicated physical layer resources corresponding to the dedicated preamble. Fig. 3 shows a schematic structural view of a coordination device according to an embodiment of the present invention. As shown, the coordinating device 10 includes a coordination determining device 101, a signaling generating device 102, and a signaling transmitting device 103.

Referring to the network environment shown in Fig. 1, the coordinating device 10 is typically disposed in the first type of base station 1. The coordination determining means 101 is operative to determine coordination between the first type of base station 1 and a second type of base station (e.g., the second type of base station 3) in connection with the access of a user equipment (e.g., user equipment 2). Signaling generating means 102 is operative to generate a signalling including a coordination indication message and a dedicated preamble for fast access to the second type of base station. The signaling device 103 is configured to send the signaling to the user equipment (for example, user equipment 2).

Fig. 4 shows a schematic configuration of an auxiliary coordination device according to an embodiment of the present invention. As shown, the auxiliary coordination device 30 includes: a preamble detection device 301, and a resource allocation device 302.

The auxiliary coordination device 30 is typically disposed in a base station. The preamble detection device 301 is configured to detect a dedicated preamble from a user equipment, and the dedicated preamble is used for fast access to the base station. The resource allocation device 302 is configured to allocate resources for the user equipment. Referring to FIG. 1, the scenario 3 in the present invention is as follows: the first type of base station 1 is a macro base station, and the second type of base station 3 is a micro cell base station; the communication between the user equipment 2 and the macro base station 1 is received by the signal of the micro cell base station 3. Interference; a coordination device 10 is provided in the macro base station 1; and an auxiliary coordination device 30 is provided in the microcell base station 3. For example, without limitation, the microcell base station 3 is a home base station. The operation of each device in this scenario will be described below with reference to Figs. 1, 3, and 4.

First, the coordination determining means 101 in the macro base station 1 will determine the coordination between the macro base station 1 and the micro cell base station 3 regarding the access of the user equipment 2.

Specifically, the user equipment 2 transmits an interference report periodically or in a burst. When the interference report received by the macro base station 1 indicates that the interference signal from the microcell base station 3 is large, for example, the received power of the interference signal (at the user equipment 2) from the microcell base station 3 exceeds a predetermined threshold, the macro base station 1 The coordination determining means 101 will determine the coordination between the macro base station 1 and the microcell base station 3 regarding access by the user equipment 2.

Next, the signaling generating means 102 in the macro base station 1 will generate a signal including a coordination indication message and a dedicated preamble for fast access to the microcell base station.

Specifically, in the present embodiment, the preamble used in the system is divided into at least two groups, including a set of dedicated preambles for fast access to the microcell base station. Typically, the set of dedicated preambles has a higher priority and the femtocell will preferentially allocate resources for user equipment that initiates access based on a dedicated preamble.

Then, the signaling transmitting means 103 in the macro base station 1 transmits the generated signaling including the coordination indication message and the dedicated preamble to the user equipment 2.

After receiving the signaling sent by the macro base station 1, the user equipment 2 will identify the information in the signaling and initiate the access based on the dedicated pre-directed microcell base station 3 carried in the signaling. Specifically, the user equipment 2 will listen to the broadcast information of the microcell base station 3 to acquire the configuration information of the micro cellular base station 3, including the random access channel resources corresponding to the dedicated preamble. User equipment 2 will then transmit this dedicated preamble using the random access channel resources corresponding to the identified dedicated preamble.

The preamble detecting device 301 in the microcell base station 3 is configured to detect from the user equipment 2 Dedicated lead.

Upon detecting a dedicated preamble from user equipment 2, resource allocation device 302 in microcell base station 3 will allocate resources for user equipment 2.

Specifically, after the resource allocation device 302 in the femtocell base station 3 allocates resources to the user equipment 2, the microcell base station 3 will send a physical layer random access response message to the user equipment 2, including the allocated resources (grant) and timing. Advance (TA).

After receiving the allocated resources and the timing advance, the user equipment 2 obtains synchronization with the microcell base station 3. After the user equipment 2 obtains synchronization with the femtocell base station 3, that is, after the user equipment 2 accesses the connection with the femtocell base station 3, the coordination indication identified by the user equipment 2 from among the signaling received from the macro base station 1 The message is forwarded to the microcell base station 3.

In accordance with an embodiment of the present invention, the secondary coordination device 30 in the microcell base station 3 further includes a message receiving device for receiving a coordination indication message from the user equipment 2.

When the message receiving apparatus in the femtocell base station 3 receives the coordination indication information, the microcell base station 3 will provide a service for its user equipment according to the indication of the coordination indication message, thereby avoiding interference between the two types of base stations.

According to an embodiment of the present invention, the signaling including the coordination indication message and the dedicated preamble generated by the signaling generating apparatus 101 in the macro base station 1 may be media access control layer signaling, or may be a radio resource control layer signaling. make. The reliability of RRC signaling is higher than that of media access control layer signaling, but the latter has less processing time in the delivery process than the former. When the signaling including the coordination indication message and the dedicated preamble is the medium access control layer signaling, a compromise can be made in the reliability and processing time of the signaling transmission.

According to an embodiment of the present invention, the system may also configure a dedicated physical layer resource corresponding to the dedicated preamble to avoid collision when the user accesses. Then, the signaling generated by the signaling generating apparatus 101 in the macro base station 1 further includes indication information of a dedicated physical layer resource corresponding to the dedicated preamble. After receiving the signaling sent by the macro base station 1 and identifying the information in the signaling, the user equipment 2 will use the dedicated physical layer resource corresponding to the dedicated pre-direction to transmit the dedicated preamble. Referring to FIG. 1, the scenario 4 in the present invention is as follows: the first type of base station 1 is a micro cell base station, and the second type base station 3 is a macro base station; the communication between the user equipment 2 and the micro cell base station 1 is received by the signal of the macro base station 3. Interference; a coordination device 10 is provided in the microcell base station 1; and an auxiliary coordination device 30 is provided in the macro base station 3. For example, but not limited to, the microcell base station 1 is a home base station. The operation of each device in this scenario will be described below with reference to Figs. 1, 3, and 4.

First, the coordination determining means 101 in the femtocell base station 1 will determine the coordination between the femtocell base station 1 and the macro base station 3 in connection with the access of the user equipment 2.

Specifically, for example, the user equipment 2 transmits an interference report periodically or in a burst. When the interference report received by the microcell base station 1 indicates that the interference signal from the macro base station 3 is large, for example, the received power of the interference signal (at the user equipment 2) from the macro base station 3 exceeds a predetermined threshold, the microcell base station 1 The coordination determining means 101 will determine the coordination between the femtocell base station 1 and the macro base station 3 regarding the access of the user equipment 2.

As another example, the microcell base station 1 can detect interference from other base stations by itself. When the microcell base station 1 detects that the interference signal from the macro base station 3 is large, the coordination determining means 101 in the microcell base station 1 determines that the access between the femtocell base station 1 and the macro base station 3 is related to the access of the user equipment 2. coordination.

Next, the signaling generating means 102 in the microcell base station 1 will generate a signalling including a coordination indication message and a dedicated preamble for fast access to the microcell base station.

Specifically, in the present embodiment, the preamble used in the system is divided into at least two groups, including a set of dedicated preambles for fast access to the macro base station. Typically, the set of dedicated preambles has a higher priority, and the macro base station will preferentially allocate resources for user equipment that initiates access based on a dedicated preamble.

Then, the signaling transmitting means 103 in the microcell base station 1 transmits the generated signaling including the coordination indication message and the dedicated preamble to the user equipment 2.

After receiving the signaling sent by the microcell base station 1, the user equipment 2 will identify the information in the signaling and initiate the access based on the dedicated pre-directed macro base station 3 carried in the signaling. Specifically, the user equipment 2 will listen to the broadcast information of the macro base station 3 to acquire the configuration information of the macro base station 3, including the random access channel resources corresponding to the dedicated preamble. then, User equipment 2 will transmit this dedicated preamble using the random access channel resources corresponding to the identified dedicated preamble.

The preamble detecting means 301 in the macro base station 3 is for detecting a dedicated preamble from the user equipment 2.

When a dedicated preamble from the user equipment 2 is detected, the resource allocation device 302 in the macro base station 3 will allocate resources for the user equipment 2.

Specifically, after the resource allocation device 302 in the macro base station 3 allocates resources to the user equipment 2, the macro base station 3 will send a physical layer random access response message to the user equipment 2, including the allocated resource (grant) and timing advance ( TA).

After receiving the allocated resources and timing advance, the user equipment 2 obtains synchronization with the macro base station 3. After the user equipment 2 obtains synchronization with the macro base station 3, that is, after the user equipment 2 accesses the connection with the macro base station 3, the coordination indication message identified by the user equipment 2 from among the signaling received from the microcell base station 1 Forwarded to the macro base station 3.

According to an embodiment of the invention, the auxiliary coordination device 30 in the macro base station 3 further comprises a message receiving means for receiving a coordination indication message from the user equipment 2.

After the message receiving apparatus in the macro base station 3 receives the coordination indication information, the macro base station 3 will provide a service for its user equipment according to the indication of the coordination indication message, thereby avoiding interference between the two types of base stations.

According to an embodiment of the present invention, the signaling including the coordination indication message and the dedicated preamble generated by the coordination generating apparatus 101 in the femtocell base station 1 may be the medium access control layer signaling or the radio resource control layer signaling. make. The reliability of the RRC signal is higher than that of the medium access control layer, but the latter has less processing time in the delivery process than the former. When the signaling including the coordination indication message and the dedicated preamble is the medium access control layer signaling, a compromise can be made in the reliability and processing time of the signaling transmission.

According to an embodiment of the present invention, the system may also configure a dedicated physical layer resource corresponding to the dedicated preamble to avoid collision when the user accesses. Then, the signaling generated by the signaling generating apparatus 101 in the microcell base station 1 further includes indication information of a dedicated physical layer resource corresponding to the dedicated preamble. After receiving the signaling sent by the microcell base station 1 and identifying the information in the signaling, the user equipment 2 will use the dedicated physical layer resource corresponding to the dedicated preamble to transmit the dedicated preamble. Those skilled in the art should understand that each device referred to in the present invention may be implemented by a hardware module, a functional module in software, or a hardware module integrated with a software function module.

Those skilled in the art will appreciate that the above-described embodiments are illustrative and not restrictive. Different technical features that appear in different embodiments can be combined to achieve a beneficial effect. Other variations of the disclosed embodiments can be understood and effected by those skilled in the <RTIgt; In the claims, the word "comprising" does not exclude other means or steps. The indefinite article "a" does not exclude a plurality. order of. Any reference signs in the claims should not be construed as limiting the scope of the invention. The functions of the various parts appearing in the claims can be implemented by a single hardware or software module. The mere fact that certain technical features are present in different sub-claims does not mean that these technical features are not combined to achieve a beneficial effect.

Claims

Claim

A method of providing a user equipment in a mobile communication network comprising at least one first type of base station and at least one second type of base station, comprising the steps of:

A. a first type of base station determines coordination with a second type of base station for accessing the user equipment, and sends a signaling to the user equipment, the signaling includes a coordination indication message and A dedicated preamble for fast access to a second type of base station;

B. The user equipment receives the signaling, and initiates a random access procedure according to the dedicated pre-direction to the second type of base station;

D. After the user equipment obtains synchronization with the second type of base station, forwarding the coordination indication message to the second type of base station.

2. The method according to claim 1, wherein the method further comprises the steps of:

C. The second type of base station detects the dedicated preamble and allocates resources for the user equipment.

The method according to claim 1 or 2, wherein the signaling comprises medium access control layer signaling or radio resource control layer signaling.

The method according to any one of claims 1 to 3, wherein the first type of base station comprises a macro base station, and the second type of base station comprises a micro cell base station.

The method according to any one of claims 1 to 3, wherein the first type of base station comprises a micro cell base station, and the second type of base station comprises a macro base station.

6. A coordination device for use in a first type of base station, comprising:

Coordination determining means, configured to determine coordination between the first type of base station and a second type of base station for accessing a user equipment;

a signaling generating apparatus, configured to generate a signaling, where the signaling includes a coordination indication message and a dedicated preamble for quickly accessing the second type of base station;

And signaling sending means, configured to send the signaling to the user equipment.

The coordination device according to claim 6, wherein the signaling generated by the signaling generating device comprises media access control layer signaling or radio resource control layer signaling.

The coordination device according to claim 6 or 7, wherein the first type of base station comprises a macro base station, and the second type of base station comprises a micro cell base station.

The coordination device according to claim 6 or 7, wherein the first type of base station comprises a micro cell base station, and the second type of base station comprises a macro base station.

10. A secondary coordination device for use in a base station, comprising:

a preamble detecting device, configured to detect a dedicated preamble from a user equipment, where the dedicated preamble is used for fast access to the base station;

And a resource allocation device, configured to allocate resources to the user equipment.

1 1. The auxiliary coordination device according to claim 10, further comprising:

And a message receiving apparatus, configured to receive a coordination indication message from the user equipment.

12. The auxiliary coordination device according to claim 10 or 11, wherein the base station comprises a microcell base station.

The auxiliary coordination device according to claim 10 or 11, wherein the base station comprises a macro base station.