WO2012167674A1

WO2012167674A1 - Base station nodeb automatic migration method and system

Info

Publication number: WO2012167674A1
Application number: PCT/CN2012/074305
Authority: WO
Inventors: 龚业
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-06-10
Filing date: 2012-04-18
Publication date: 2012-12-13
Also published as: CN102202366A

Abstract

The present invention provides a base station NodeB automatic migration system, which comprises M Radio Network Controllers (RNC) and N NodeBs. The RCN to which radio resource of the NodeBs are connected or associated is used to allocate and control the radio resource of the NodeBs, Where the M RNCs and the N NodeBs establish connection link respectively. The M RNCs share control of the N NodeBs. When the RNC or link fails, the NodeBs of the faulted RNC migrate to the target RNC. The target RNC is chosen from the M RNCs. The automatic migration of the base station is implemented with high efficiency and the problem of low efficiency of present base station migration is resolved with the base station NodeB automatic migration method and system provided by the present invention.

Description

Base station automatic migration method and system thereof

The present invention relates to Wideband Code Division Multiple Access (WCDMA) mobile communication technology, and in particular to a base station automatic migration method and system thereof. Background technique

According to the related protocol of the 3rd Generation Mobile Partner Communication Project (3GPP), the Universal Terrestrial Radio Access Network (UTRAN) is composed of a Radio Network Controller (RNC) and a Base Station (NodeB). User equipment (UE) provides services. The RNC is in a controlling position to allocate and control the radio resources of the NodeB connected to it or related. The NodeB completes the data stream conversion between the RNC and the NodeB interface and provides support for the UE to access the UTRAN.

In practical applications, in order to prevent the associated NodeB from losing service when the RNC or Iub port fails, the NodeB is usually associated with two or more RNCs. In normal operation, the NodeB is controlled by only one of the RNCs (the RNC is the primary RNC of the NodeB, and the other RNC is the standby RNC of the NodeB). When the primary RNC fails, the NodeB can be taken over by a standby RNC. Continue to provide services to the UE. Let the NodeB be controlled from one RNC to another (this process is called NodeB migration). There are currently two ways to do this:

Method 1. Manually delete the related wireless parameters and transmission parameters of the NodeB to be migrated from the active RNC, and then add them to the standby RNC to be migrated.

Method 2: The related wireless parameters and transmission parameters of the NodeB to be migrated are exported from the active RNC, and are modified by the user to be configured to the standby RNC to be migrated.

Both of the above methods use the manual method to complete the migration of NodeB, which is inefficient and not It can meet the needs of a large number of RNC failures, or the failure of the link, the manual work is relatively large, resulting in lower efficiency. Summary of the invention

An object of the present invention is to provide a method and system for automatically moving a base station, which can efficiently implement automatic migration of a base station and solve the problem of low efficiency when the base station is currently migrated.

In order to solve the above technical problem, the present invention provides a base station NodeB automatic migration system, which includes M radio network controllers RNC and N NodeBs, where the RNC is used to allocate and control NodeB radio resources connected or related to itself. The M RNCs establish a connection link with the N NodeBs, and the M RNCs share the control rights of the N NodeBs. When the RNC fails or the link fails, the NodeB managed by the faulty RNC migrates to the destination RNC. The destination RNC is selected from the M RNCs.

Further, the M RNCs and the N NodeBs respectively establish an Iub interface control plane link through the Iub.

Further, the M RNCs are configured to maintain the relevant radio parameters of the N NodeBs. Each NodeB parameter configuration saved in the RNC uses a parameter configuration enable flag to identify whether the NodeB parameter configuration takes effect in the RNC.

Further, the NodeB internally stores M RNC "whether the primary RNC" identifier to identify whether the RNC is the primary RNC of the NodeB, and only one of the "primary RNC" identifiers is "Yes", and other "No".

Further, when the RNC is faulty or the link is faulty, the destination RNC also changes the corresponding NodeB parameter configuration enable flag to "enable", starts the NodeB parameter configuration, and is responsible for controlling the NodeB; the NodeB will The destination RNC identifies the primary RNC.

Further, the NodeB performs the NBAP signaling interaction with the primary RNC only. If the NodeB receives the NBAP signaling from the standby RNC, the NodeB responds with an error indication, indicating that the standby RNC no longer enables the NodeB. Parameter configuration. In order to solve the above technical problem, the present invention further provides a base station automatic migration method, including M radio network controllers RNC and N NodeBs, where the M RNCs share control rights of N NodeBs, and the method includes:

When the NodeB detects that the primary RNC is faulty, 4 megabytes selects a standby RNC as the destination RNC, and requests the destination RNC to take over control of itself;

Purpose After receiving the takeover request, the RNC takes over the control of the NodeB;

Purpose The RNC aligns resources with the NodeB and the migration is complete.

Further, the method further includes: the RNC saves the relevant radio parameter configuration of each NodeB, and each NodeB parameter configuration saved in the RNC uses a parameter configuration enable flag to identify whether the NodeB parameter configuration takes effect in the RNC. Each RNC saved internally by the NodeB uses the "whether primary RNC" identifier to identify whether the RNC is the primary RNC controlling the NodeB, and only one of the "primary RNC" identifiers is "yes", other All are "No".

Further, when detecting that the primary RNC is faulty, the NodeB selects a standby RNC as the destination RNC, and requests the destination RNC to take over control of itself, including:

Steps: Al and NodeB periodically detect their own active RNC. When the primary RNC is detected, go to step A2. Otherwise, continue to detect.

Step A2: The NodeB selects an RNC as the destination RNC in the available standby RNC, and sends NBAP signaling to the destination RNC, requesting the destination RNC to take over control of itself.

Further, after receiving the takeover request, the destination RNC takes over the control of the NodeB, and includes:

Step Bl, the destination RNC receives the NBAP signaling, detects that it can take over the NodeB, goes to step B4, otherwise goes to B2;

Step B2: The destination RNC discards the NBAP signaling message.

Step B3: The NodeB does not receive the NBAP signaling response within a certain period of time, and the destination is The RNC is set to be unavailable, and the other RNCs are selected as the destination RNC to take over the NodeB. Step B4: The destination RNC changes the parameter configuration enable flag of the NodeB to "enable" to enable parameter configuration of the NodeB.

Step B5, the destination RNC sends an NBAP signaling response to the NodeB, and takes over the NodeB;

Step B6: After receiving the NBAP signaling, the NodeB identifies the destination RNC as the primary RNC, and replies to the NBAP signaling response to the new primary RNC.

Further, the destination RNC aligns resources with the NodeB by using at least one of the following methods:

The destination RNC sends a cell deletion request to the NodeB, and sequentially deletes all cells in the NodeB; and then re-establishes on the NodeB by cell establishment, common transport channel establishment, system information update, physical shared channel reconfiguration, and common measurement initialization. Wireless resources;

The destination RNC aligns the wireless parameters of the common channel with the NodeB through a cell reconfiguration process, a common transport channel reconfiguration procedure, and aligns the common measurement with the NodeB through a common measurement suspension, a common measurement initialization process; NodeB aligns dedicated channel resources;

The destination RNC aligns the wireless parameters of the common channel with the NodeB through a cell reconfiguration procedure, a common transport channel deletion, a common transport channel establishment procedure, and aligns the common measurement with the NodeB through a common measurement suspension, a common measurement initialization procedure; Aligning the dedicated channel resources with the NodeB;

The destination RNC aligns the wireless parameters of the common channel with the NodeB through a cell reconfiguration process, a common transport channel reconfiguration procedure, and aligns the common measurement with the NodeB through a common measurement suspension, a common measurement initialization process; NodeB aligns the dedicated channel resource; if the radio cell parameter of the RNC is configured with the high speed downlink packet access HSDPA or the high speed uplink packet access HSUPA parameter, or the NBAP signaling response of the NodeB is stored In the HSDPA or HSUPA of the cell, the RNC also aligns the code channel and power parameters of the HSDPA or HSUPA with the NodeB through a physical shared channel reconfiguration procedure.

Further, the method further includes: when receiving the NBAP signaling of the other standby RNC, the NodeB replies with an error indication carrying the cause of the error to the standby RNC.

Further, when receiving the NBAP signaling of the other standby RNC, the NodeB replies with an error indication carrying the cause of the error to the standby RNC, including:

Step 10: When receiving the NBAP signaling of the RNC, the NodeB determines whether the RNC uses the RNC, and if yes, performs normal service processing. If not, go to step 20;

Step 20: The NodeB sends an error indication to the RNC, indicating that the primary RNC of the NodeB is not the RNC.

Step 30: The RNC sets the parameter configuration enable flag of the internal NodeB to "not enabled", and suspends service interaction with the NodeB.

Compared with the prior art, the present invention provides a base station automatic migration method and a system thereof, which can efficiently implement automatic migration of a base station, and solve the problem of low efficiency of current base station migration. And the use of an open standard Iub protocol interface facilitates the development of a common standard. DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

Figure 1 is a block diagram of the Iub protocol.

2 is a schematic diagram of the migration of the NodeB automatic migration system according to the embodiment of the present invention, where the solid line indicates that the RNC has a service interaction with the NodeB, and the dotted line indicates that the RNC and the NodeB only have a transmission link, and no service interaction.

FIG. 3 is a flowchart of a method for implementing NodeB automatic migration by Iub according to an embodiment of the present invention. FIG. 4 is a flowchart of processing performed by the NodeB and the RNC according to the embodiment of the present invention whether the RNC is not aligned with the NodeB primary RNC. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments in order to make the present invention. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in Figure 1, it is a lub protocol structure diagram. The lub interface is further divided into a control plane and a user plane. The control plane is used to transmit the NodeB Application Part (NBAP) signaling. The RNC controls the NodeB and manages the NodeB radio resources through NBAP signaling.

As shown in FIG. 2, an embodiment of the present invention provides a base station automatic migration system, where the system includes M RNCs and N NodeBs, where M and N are greater than or equal to 2, and M RNCs and N NodeBs are respectively established through lubs. Lub port control plane link. The RNC is in a controlling position in the UTRAN for allocating and controlling the NodeB radio resources connected or related thereto, and the NodeB completes the data stream conversion of the lub (the interface between the RNC and the NodeB) and provides support for the UE to access the UTRAN. When the RNC fails or the lub fails, the NodeB managed by the original RNC needs to be migrated to another destination RNC by a certain method to continue to provide services for the UE. The destination RNC is selected from the M RNCs.

The M RNCs that need to share resources are combined into an RNC pool, which shares the control of N NodeBs, but a NodeB can only be controlled by one RNC at a time.

Each of the M RNCs maintains parameter configurations such as related radio parameters and transmission parameters of the N NodeBs, and each NodeB parameter configuration stored in the RNC uses a "parameter configuration enable flag" to identify whether the NodeB parameter configuration is in the RNC. Effective in the middle. For example, if the parameter configuration enable flag of the NodeB1 in the RNC1 is "enabled", the NodeB1 parameter configuration of the RNC1 is valid, and the RNC1 is responsible for controlling the NodeB1. Otherwise, the NodeB1 parameter configuration of the RNC1 is invalid. Similarly, the M RNCs saved internally by the NodeB use the "whether primary RNC" identifier to identify whether the RNC is the primary RNC controlling the own NodeB, and only one of the M "whether primary RNC" identifiers is "Yes". ", the others are "no". During normal operation, the NodeB only performs NBAP signaling interaction with the primary RNC. If the NodeB receives the NBAP signaling from the standby RNC, it responds with an error indication, indicating that the standby RNC no longer enables the parameter configuration of the NodeB.

The initial values of the RNC's NodeB configuration parameter enable flag group and the NodeB "whether the primary RNC" identification group are configured by the network management system and dynamically change when a NodeB migration occurs.

Take FIG. 2 as an example for explanation. In Figure 2, RNC1 and RNC2 form an RNC pool, which shares the control rights of NodeB1 and NodeB2. RNC 1 and RNC2 establish an Iub interface control plane link with NodeB 1 and NodeB2 respectively. RNC1 and RNC2 both store the relevant radio parameters of NodeB1 and NodeB2. Parameter configuration such as transmission parameters; the solid line in the figure indicates that the RNC has a service interaction with the NodeB, and the dotted line indicates that only the transmission link exists between the RNC and the NodeB, and there is no service interaction.

Before the migration, for RNC1, the parameter configuration enable flag of the internally saved NodeB1 is "Enable,", the NodeBl parameter configuration is valid, RNC1 is responsible for controlling NodeBl, and the parameter configuration enable flag of NodeB2 is "Not enabled", NodeB2 parameter The configuration does not work. RNC1 is not responsible for controlling NodeB2. For RNC2, the parameter setting enable flag of internal save NodeB2 is "Enable", the NodeB2 parameter configuration is valid, RNC2 is responsible for controlling NodeB2, and the parameter configuration enable flag of NodeB1 is "Do not make "NodeBl parameter configuration does not work, RNC2 is not responsible for controlling NodeBl; NodeB 1's primary RNC is RNC 1, and NodeB2's primary RNC is RNC2.

When the RNC1 fails or the Iub fails, the RNC1 cannot continue to manage the NodeB1 and needs to be migrated. In this case, the parameter configuration enable flag of the NodeB1 in the RNC2 is "enabled", the NodeBl parameter configuration is valid, and the RNC2 is responsible for controlling the NodeB1. Therefore, after the migration, the parameter configuration enable flags of NodeB1 and NodeB2 in RNC2 are both "enable", the parameter configurations of both NodeB1 and NodeB2 are valid, and RNC2 is responsible for controlling NodeB1 and NodeB2. As shown in FIG. 3, a method for automatically moving a base station according to an embodiment of the present invention includes the following steps:

Step 1. The NodeB periodically checks whether the running status of its active RNC is faulty. If a fault is detected, go to step 2. Otherwise, no migration is required and the detection continues.

The RNC stores the related wireless parameter configuration of each NodeB. Each NodeB parameter configuration saved in the RNC uses the parameter configuration enable flag to identify whether the NodeB parameter configuration takes effect in the RNC. Similarly, each RNC saved internally by the NodeB uses the "whether primary RNC" identifier to identify whether the RNC is the primary RNC controlling the NodeB, and only one of the "primary RNC" identifiers is "yes", Others are "No".

The fault type of the active RNC includes at least one of the following: The Iub interface is broken, and the NBAP signaling sent to the active RNC does not respond within a certain period of time. The audit request of the primary RNC is not received within a certain period of time.

Step 2: The NodeB selects an available standby RNC as the destination RNC among the remaining available RNCs, sends an request auditing instruction to it, requests the destination RNC to take over its own control right, and waits for the audit request of the destination RNC.

The NodeB can also implement the process of requesting the control RNC to take over control of itself by sending other NBAP signaling, and the NBAP signaling includes at least one of the following: a resource status indication, a reset request, and an error indication.

Step 3: Purpose The RNC receives the request auditing instruction from the NodeB, and detects that its own resource status (such as fault condition and load condition) can meet the conditions for taking over the NodeB, then go to step 6; otherwise, go to step 4;

Step 4. Purpose The RNC discards the request auditing instruction message.

Step 5: If the NodeB does not receive the audit request of the destination RNC within a certain period of time, the RNC is set to be unavailable, and the process proceeds to step 2;

Step 6. The destination RNC replies to the audit request, and configures the internal parameters of the NodeB. The flag can be set to "enable", enable the internal NodeB parameter configuration, and adaptively calculate the neighbor relationship of the cell to control itself;

Step 7. The NodeB sets the RNC that sends the audit request to its own primary RNC, sets the other RNCs as standby RNCs, and responds to the new primary RNC with the audit response.

Step 8. Purpose The RNC aligns the resources with the NodeB and the migration is complete.

At least one of the following methods is used to achieve the alignment between the target RNC and the resource of the NodeB, including:

Mode 1, the destination RNC sends a cell deletion request to the NodeB, and sequentially deletes all cells in the NodeB; and then re-runs the NodeB through a process such as cell establishment, common transport channel establishment, system information update, physical shared channel reconfiguration, and common measurement initialization. Establishing a radio resource; mode 2: The destination RNC aligns the radio parameters of the common channel with the NodeB through the cell reconfiguration process and the common transport channel reconfiguration procedure; aligns the common measurement with the NodeB through the common measurement suspension, the common measurement initialization process; The process aligns the dedicated channel resources with the NodeB.

Manner 3: The destination RNC aligns the wireless parameters of the common channel with the NodeB through the cell reconfiguration process, the common transport channel deletion, the common transport channel establishment procedure, and the public measurement by the common measurement suspension, the common measurement initialization process, and the NodeB; Align dedicated channel resources with the NodeB.

The destination RNC aligns the wireless parameters of the common channel with the NodeB through the cell reconfiguration process and the common transport channel reconfiguration process; aligns the common measurement with the NodeB through the common measurement suspension, the common measurement initialization process; and aligns with the NodeB through the reset process. Dedicated channel resources; if the radio cell parameters of the RNC are configured with HSDPA (High Speed Downlink Packet Access) or HSUPA (High Speed Uplink Packet Access) parameters, or if there is a cell HSDPA or HSUPA in the audit response of the NodeB, then the RNC should also pass the physics. The shared channel reconfiguration procedure aligns the code channel and power parameters of the HSDPA or HSUPA with the NodeB.

In addition, in order to avoid the occurrence of two or more RNCs trying to control one at the same time In the case of the NodeB, the NodeB should reply to the error indication when receiving the NBAP signaling of the other standby RNC. The error indication carries the cause of the error. The type of the error is Misc. The reason is O&M intervention. As shown in Figure 4, the specific methods include:

Step 10: When receiving the NBAP signaling of the RNC, the NodeB determines whether the RNC uses the RNC, and if yes, performs normal service processing. If not, skip to step 20;

Step 20: The NodeB returns an error indication to the RNC, indicating that the primary RNC of the NodeB is not the RNC.

Step 30: The RNC sets the internal NodeB parameter configuration enable flag to "not enabled", and suspends service interaction with the NodeB. Industrial applicability

With the solution of the present invention, the automatic migration of the base station can be efficiently realized, and the problem of low efficiency in the current base station migration is solved. And the use of an open standard Iub protocol interface facilitates the development of a common standard.

It should be noted that: The present invention uses the NodeB to reply to the standby RNC with an error indication, and the error indication carries the cause of the error, and the type of the error is Misc. The reason is O&M intervention, which indicates that the RNC disables the internal NodeB. Parameter configuration enable flag; if the NodeB responds to other signaling to achieve the above purpose, it is also within the scope of this patent. These signaling include but are not limited to: other error indication, reset request, audit failure.

The above description shows and describes a preferred embodiment of the present invention, but as described above, it should be understood that the present invention is not limited to the forms disclosed herein, and should not be construed as Other combinations, modifications, and environments are possible and can be modified by the teachings or related art or knowledge within the scope of the inventive concept described herein. All changes and modifications made by those skilled in the art are intended to be within the scope of the appended claims.

Claims

Claim

1. A base station NodeB automatic migration system, characterized in that the system comprises M radio network controllers RNC and N NodeBs;

The RNC is configured to allocate and control a NodeB radio resource that is connected or related to itself; wherein, the M RNCs establish a connection link with the N NodeBs, and the M RNCs share control rights of the N NodeBs. When the RNC fails or the link fails, the NodeB managed by the faulty RNC migrates to the destination RNC, and the destination RNC is selected from the M RNCs.

2. The system according to claim 1, wherein the M RNCs and the N NodeBs respectively establish an Iub interface control plane link through the Iub.

3. The system according to claim 1, wherein the M RNCs store related radio parameter configurations of the N NodeBs, and each NodeB parameter configuration saved in the RNC uses a parameter configuration enable flag to identify the Whether the configuration of the NodeB parameter takes effect in the RNC.

The system according to claim 3, wherein the NodeB internally stores M RNC "whether the primary RNC" identifier to identify whether the RNC is the primary RNC of the NodeB, and "whether the primary RNC is used. "Only one of the logos is "Yes" and the others are "No".

The system according to claim 4, wherein, when the RNC fails or the link is faulty, the destination RNC changes the corresponding NodeB parameter configuration enable flag to "enable", and starts the NodeB parameter. The configuration is responsible for controlling the NodeB; the NodeB identifies the destination RNC as the primary RNC.

The system according to claim 4 or 5, wherein the NodeB only performs interaction with the primary RNC for Node B application part NBAP signaling, and if the NodeB receives NBAP signaling from the standby RNC, the response error indication Indicates that the standby RNC no longer enables parameter configuration of the NodeB.

A method for automatically moving a base station, comprising: M radio network controllers RNC and N NodeBs, wherein the M RNCs share control rights of N NodeBs, wherein the method Includes:

Purpose The RNC aligns resources with the NodeB and the migration is complete.

8. The method according to claim 7, wherein the method further comprises: the RNC saves a related wireless parameter configuration of each NodeB, and each NodeB parameter configuration saved in the RNC uses a parameter configuration enable flag to Determining whether the NodeB parameter configuration is valid in the RNC; each RNC saved internally by the NodeB uses the "whether primary RNC" identifier to identify whether the RNC is the primary RNC controlling the NodeB, and "whether the primary use Only one of the RNC" logos is "yes" and the others are "no".

The method according to claim 8, wherein, when the NodeB detects that the primary RNC is faulty, it selects a standby RNC as the destination RNC, and requests the destination RNC to take over control of itself, including:

The method according to claim 9, wherein, after receiving the takeover request, the destination RNC takes over the control of the NodeB, and includes:

Step B2: The destination RNC discards the NBAP signaling message.

Step B3: The NodeB does not receive the NBAP signaling response within a certain period of time, and sets the destination RNC to be unavailable, and continues to select other standby RNCs as the destination RNC to take over the NodeB. Step B4: The destination RNC changes the parameter configuration enable flag of the NodeB to "enable", and enables parameter configuration of the NodeB.

The method according to claim 7, wherein the destination RNC aligns resources with the NodeB, and at least adopts any one of the following methods:

The destination RNC aligns the wireless parameters of the common channel with the NodeB through a cell reconfiguration process, a common transport channel reconfiguration procedure, and aligns the common measurement with the NodeB through a common measurement suspension, a common measurement initialization process; The NodeB aligns the dedicated channel resource; if the radio cell parameter of the RNC is configured with the high speed downlink packet access HSDPA or the high speed uplink packet access HSUPA parameter, or the NBAP signaling response of the NodeB is HSDPA or HSUPA of the cell, RNC also reconfigures processes and locations through physical shared channels. The NodeB is aligned with the code channel and power parameters of HSDPA or HSUPA.

The method according to claim 8, wherein the method further comprises: when receiving the NBAP signaling of the other standby RNC, the NodeB replies with an error indication carrying the cause of the error to the standby RNC.

The method according to claim 12, wherein, when receiving the NBAP signaling of the other standby RNC, the NodeB replies with an error indication carrying the cause of the error to the standby RNC, including:

Step 10: When receiving the NBAP signaling of the RNC, the NodeB determines whether the RNC uses the RNC, and if yes, performs normal service processing. If not, go to step 20; Step 20, the NodeB goes to the The RNC replies with an error indication, indicating that the primary RNC of the NodeB is not the RNC;