WO2012155545A1

WO2012155545A1 - Method and system for controlling uplink closed loop transmit diversity

Info

Publication number: WO2012155545A1
Application number: PCT/CN2012/070987
Authority: WO
Inventors: 史莉荣
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-08-18
Filing date: 2012-02-09
Publication date: 2012-11-22
Also published as: CN102958143A

Abstract

Disclosed are a method and system for controlling uplink closed loop transmit diversity. When a user equipment is only provided with a dedicated channel, a Node B determines and sends to a radio network controller a control command for instruction of activating/deactivating uplink closed loop transmit diversity. The technology of the present invention for controlling uplink closed loop transmit diversity enables a user equipment to activate/deactivate uplink closed loop transmit diversity when only a dedicated channel is provided.

Description

Method and system for controlling uplink closed loop transmit diversity

The present invention relates to the field of communications, and in particular, to a method and system for controlling uplink closed loop transmit diversity. Background technique

High Speed Uplink Packet Access (HSUPA) is an enhanced technology introduced in the 3GPP Release (Re), designed to improve the transmission rate of the uplink and is a performance of the Wideband Code Division Multiple Access (WCDMA) uplink system. Enhance and extend. HSUPA improves uplink system transmission performance by introducing fast uplink hybrid retransmission (HARQ), Node B-based uplink scheduling, and simpler multi-code transmission with previous versions, so that the maximum peak transmission rate of the uplink can reach 5.76. Mega per second (Mbps).

Multi-antenna technology enables higher system capacity, wider cell coverage, and better quality of service by using multiple antennas at the transmitter and/or receiver. Multiple antennas at the sender and/or receiver can be used to implement either transmit or receive diversity or spatial multiplexing. The transmit diversity technique is an anti-fading technique in the field of wireless communication in which at least two signals containing the same information are transmitted at the transmitting end. These signals carrying the same information are derived from at least two mutually independent sources. According to the structure and statistical characteristics of the transmitted signal samples and the wireless resources occupied by them, the transmit diversity technology can be divided into three basic types: space, frequency and time, or they can be combined with each other.

The transmit diversity technique is divided into an open loop transmit diversity mode and a closed loop transmit diversity mode according to whether the receiving end needs to feed back the feedback diversity of the transmitting end. In open-loop transmit diversity mode, the receiving end does not feed back any additional transmission-related information to the transmitting end, and the transmitting end can use its own coding technique (such as simple space-time coding) to complete transmit diversity. In closed loop transmit diversity mode, The receiving end needs to use feedback channel feedback to the transmitting end with a parameter related to transmit diversity (for example, a precoding vector required for transmit diversity, indicated by precoding indication information), and the transmitting end uses the feedback information to complete transmit diversity after receiving.

At present, a consensus has been reached at the 3gpp conference: When the user equipment (UE) is configured with a high-speed link packet access channel, the high-speed shared control channel command is used to control the activation and deactivation of the uplink closed-loop transmit diversity, but if the user equipment is only configured With a dedicated channel, high speed shared control channel commands cannot be used. Therefore, it is necessary to study how to activate/deactivate the uplink closed-loop transmit diversity in the case where the user equipment is only configured with a dedicated channel, but there is currently no definite method. Summary of the invention

In view of this, it is a primary object of the present invention to provide a method and system for controlling uplink closed loop transmit diversity to ensure that uplink closed loop transmit diversity can be activated/deactivated if the user equipment is only configured with a dedicated channel.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A method of controlling uplink closed loop transmit diversity, the method comprising:

When the user equipment is only configured with a dedicated channel, Node B makes a decision and sends a control command to the radio network controller indicating activation/deactivation of the uplink closed-loop transmit diversity.

The method further includes:

The radio network controller instructs the user equipment to activate/deactivate the uplink closed loop transmit diversity by using the signaling including the activation indication information, and the user equipment learns whether the uplink closed loop transmit diversity is activated according to the received activation indication information, and performs corresponding data processing accordingly.

The message that the radio network controller instructs the user equipment to activate/deactivate the uplink closed-loop transmit diversity signaling is the existing Uu interface (the interface between the radio network controller and the user equipment) message, which is an existing message. , or a new message.

The message of the control command sent by the node B is: an existing Iub interface (radio network controller and node B) message, which is an existing message, or a newly added message. When the user equipment performs the movement between the radio network controllers, the method further includes: the drift radio network controller of the user equipment notifying the serving radio network controller to send a control command to indicate that the uplink closed-loop transmit diversity is activated/deactivated, including: The drift radio network controller carries the activation indication information of the uplink closed loop transmit diversity in the message sent to the serving radio network controller, and the serving radio network controller instructs the user equipment to activate/deactivate according to the received activation indication information. The uplink closed-loop transmit diversity is performed by the user equipment according to the corresponding data transmission.

The activation information indicating that the drift radio network controller notifies the serving radio network controller of the uplink closed loop transmit diversity is the existing lur interface (the interface between the serving radio network controller and the drift radio network controller), An existing message, or a new message.

The activation indication information of the uplink closed loop transmit diversity is an indication field, and is used to indicate activation/deactivation according to different values, including at least one of the following:

The indication field Activate indicates activation, the indication field De-activate indicates deactivation; or the indication field indicates activation when it exists, and indicates deactivation when it does not exist;

Alternatively, the indication field indicates deactivation when it exists, and indicates activation when it does not exist.

A system for controlling uplink closed loop transmit diversity, the system comprising a radio network controller, a node ^ user equipment;

The node B is configured to determine and send a control command to the radio network controller to indicate activation/deactivation of the uplink closed-loop transmit diversity.

The radio network controller is further configured to: indicate, by using the signaling that includes the activation indication information, that the user equipment activates/deactivates the uplink closed-loop transmit diversity, and triggers the user equipment to learn, according to the received activation indication information, whether the uplink closed-loop transmit diversity is activated. And according to this, the corresponding data processing.

The message of the control command sent by the node B is: an existing Iub port (none Line network controller and node B) messages, which are already existing messages, or new messages. Wherein, when the user equipment performs the movement between the wireless network controllers, the wireless network controller is further configured to:

The user equipment's drift radio network controller notifies the serving radio network controller to send a control command to indicate activation/deactivation of the uplink closed loop transmit diversity, including: The drift radio network controller carries an uplink closed loop in the message sent to the serving radio network controller The activation indication information of the transmit diversity, the serving radio network controller instructs the user equipment to activate/deactivate the uplink closed loop transmit diversity according to the received activation indication information, and triggers the user equipment to perform corresponding data transmission accordingly.

The present invention controls the uplink closed loop transmit diversity technique to ensure that the uplink closed loop transmit diversity can be activated/deactivated if the user equipment is only configured with a dedicated channel. DRAWINGS

1 is a flowchart of an activation indication of a node B transmitting an uplink closed-loop transmit diversity to a radio network controller according to an embodiment of the present invention;

2 is a flowchart of an activation indication of a radio network controller transmitting an uplink closed-loop transmit diversity to a user equipment according to an embodiment of the present invention;

3 is a flowchart of an activation indication of a downlink radio network controller transmitting uplink closed-loop transmit diversity to a serving radio network controller according to an embodiment of the present invention; 4 is a flowchart of dynamically controlling activation/deactivation of uplink closed loop transmit diversity by a radio network controller according to an embodiment of the present invention;

FIG. 5 is a flowchart of dynamically controlling activation/deactivation of uplink closed loop transmit diversity by a radio network controller according to another embodiment of the present invention; FIG.

FIG. 6 is a schematic flow chart of controlling uplink closed loop transmit diversity according to an embodiment of the present invention. detailed description

In the case that the user equipment is only configured with a dedicated channel, when the uplink closed-loop transmit diversity is to be activated/deactivated, the control may be performed by the Node B, and the signaling message is further used for control. For example: Node B decides and sends a control command to the radio network controller to indicate activation/deactivation of the closed loop transmit diversity.

And, the radio network controller can indicate to the user equipment to activate/deactivate the uplink closed loop transmit diversity by signaling. The user equipment learns whether the uplink closed-loop transmit diversity is activated according to the received activation indication information, and performs corresponding coding according to the data transmission.

Specifically, the message that the node B indicates to the radio network controller that the control command to activate/deactivate the uplink closed-loop transmit diversity may be: an existing Iub interface (radio network controller and node B) message, such as a radio link parameter. Update messages, etc. Of course, new messages can also be used, such as: uplink closed loop transmit diversity activation indication message, and the like.

Specifically, the message that the radio network controller instructs the user equipment to activate/deactivate the uplink closed-loop transmit diversity signaling may be a currently existing Uu interface (an interface between the radio network controller and the user equipment), such as: An existing message such as a bearer setup message, a radio bearer reconfiguration message, an active set update message, a radio resource control setup message, and the like. Of course, new messages can also be used, such as: uplink closed loop transmit diversity activation indication message, and the like.

When the user equipment performs the movement between the radio network controllers, the drift radio network controller of the user equipment may notify the serving radio network controller to send a control command to indicate activation/deactivation of the uplink closed loop transmit diversity, as follows: Drift wireless network control In the service wireless network control The message sent by the controller carries the activation indication information of the uplink closed loop transmit diversity, and the serving radio network controller instructs the user equipment to activate/deactivate the uplink closed loop transmit diversity according to the received activation indication information, and the user equipment performs accordingly. The corresponding data is sent.

The floating wireless network controller notifies the service that the radio network controller's uplink closed-loop transmit diversity activation indication message may be the existing existing lur interface (the interface between the serving radio network controller and the drift radio network controller), such as: An existing message such as a road parameter update message. Of course, new messages can also be used, such as: uplink closed loop transmit diversity activation indication message, and the like.

The activation indication information of the uplink closed loop transmit diversity may be an indication field, which is used to indicate activation/deactivation according to different values, such as at least one of the following: the indication field Activate indicates activation, and the indication field De-activate indicates deactivation; or The indication field indicates activation when it exists, and indicates deactivation when it does not exist; or indicates deactivation when the indication field exists, and indicates activation when it does not exist.

The invention will now be described in detail in conjunction with the drawings and embodiments.

Referring to FIG. 1, FIG. 1 illustrates an activation indication process for Node B to send an uplink closed-loop transmit diversity to a radio network controller, where the process includes the following steps:

Step 100: The node B sends a control message to the radio network controller, where the message includes activation indication information of the uplink closed loop transmit diversity.

Step 101: The radio network controller acquires uplink closed loop transmit diversity activation indication information. The control message may be a message that already exists, such as a radio link parameter update message. Of course, new messages can also be used, such as: uplink closed loop transmit diversity activation indication message, and the like.

Referring to FIG. 2, FIG. 2 illustrates an activation indication procedure for the radio network controller to send uplink closed loop transmit diversity to the user equipment, where the process includes the following steps:

Step 200: The radio network controller sends a control message to the user equipment, where the message includes activation indication information of the uplink closed loop transmit diversity.

Step 201: The user equipment acquires an activation indication information of the uplink closed loop transmit diversity, and according to the Encode the data.

The control message sent by the radio network controller to the user equipment may be an existing Uu port message, such as: a radio bearer setup message, a radio bearer reconfiguration message, an active set update message, a radio resource control setup message, etc. Message. Of course, new messages, such as activation indication notifications, can also be used.

Referring to FIG. 3, FIG. 3 illustrates an activation indication process for the uplink radio network controller to send uplink closed-loop transmit diversity to the serving radio network controller, where the process includes the following steps:

Step 300: The drift radio network controller sends a control message to the serving radio network controller, where the message includes activation indication information of the uplink closed loop transmit diversity.

Step 301: The serving radio network controller acquires activation indication information of the uplink closed loop transmit diversity, and receives data according to the data.

The control message may be a message that already exists, such as a radio link parameter update message. Of course, new messages can also be used, such as: uplink closed loop transmit diversity activation indication message, and the like.

In actual application, the activation indication information of the uplink closed-loop transmit diversity may be an indication field, which is used to indicate activation/deactivation according to different values, such as the indication field Activate indicates activation, and the indication field De-activate indicates deactivation. As shown in Table 1-1.

Table 1-1

Alternatively, the activation indication information of the uplink closed-loop transmit diversity may be an indication field, and the indication field indicates activation when it exists, and deactivation when it does not exist, as shown in Table 1-2.

Field name Value range Meaning description

Upstream closed-loop transmit score (true) indicates activation when this field set activation indication is included Table 1-2

Alternatively, the activation indication information of the uplink closed-loop transmit diversity may be an indication field, and the indication field indicates deactivation when it exists, and indicates activation when it does not exist, as shown in Table 1-3.

Table 1-3

Referring to FIG. 4, FIG. 4 illustrates a flow chart of the activation/deactivation of the dynamic control uplink closed-loop transmit diversity of the radio network controller, and the process includes the following steps:

Step 400: Node B decodes data sent by the user equipment.

Step 401: If the received data quality is poor, the uplink closed loop transmit diversity is activated under the condition that the user equipment supports the uplink closed loop transmit diversity.

There are several ways to evaluate the poor quality of received data, such as the received bit error rate is greater than a preset threshold.

Referring to FIG. 5, FIG. 5 illustrates a flow chart of the activation/deactivation of the dynamic control uplink closed loop transmit diversity of the radio network controller, and the process includes the following steps:

Step 500: Node B decodes data sent by the user equipment.

Step 501: If the received data quality is good, and the current user equipment has activated the uplink closed loop transmit diversity, then the uplink closed loop transmit diversity is deactivated.

There are several ways to evaluate the quality of received data, such as the received bit error rate is less than a certain threshold.

As can be seen from the above embodiments, in the system for controlling uplink closed loop transmit diversity, the wireless network controller, the node B, and the user equipment can perform the process shown in FIG. 6, and the process includes the following steps:

Step 610: It is learned that the user equipment is only configured with a dedicated channel. Step 620: The Node B determines and sends a control command to the radio network controller to indicate activation/deactivation of the uplink closed loop transmit diversity.

In summary, the present invention controls the uplink closed loop transmit diversity technique, whether it is a method or a system, to ensure that the uplink closed loop transmit diversity can be activated/deactivated if the user equipment is only configured with a dedicated channel.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

A method for controlling uplink closed loop transmit diversity, the method comprising:

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

3. The method according to claim 2, wherein

The message that the radio network controller instructs the user equipment to activate/deactivate the uplink closed-loop transmit diversity signaling is the currently existing Uu interface (the interface between the radio network controller and the user equipment) message, which is an existing message, or Is a new message.

4. The method according to claim 1, wherein

The message of the control command sent by the node B is: an existing Iub port (radio network controller and node B) message, an existing message, or a new message.

The method according to any one of claims 1 to 4, wherein, when the user equipment performs the movement between the wireless network controllers, the method further includes:

The user equipment's drift radio network controller notifies the serving radio network controller to send a control command to indicate activation/deactivation of the uplink closed loop transmit diversity, including: The drift radio network controller carries an uplink closed loop in the message sent to the serving radio network controller The activation indication information of the transmit diversity, the serving radio network controller instructs the user equipment to activate/deactivate the uplink closed loop transmit diversity according to the received activation indication information, and the user equipment performs corresponding data transmission accordingly.

6. The method according to claim 5, wherein

The activation indication information of the drift radio network controller notification service radio network controller uplink closed loop transmit diversity is the existing lur port (serving the radio network controller and the drift radio network) The interface between the controllers, the message, is an existing message, or a new message.

The method according to any one of claims 2 to 4, wherein the activation indication information of the uplink closed-loop transmit diversity is an indication field for indicating activation/deactivation according to different values, including at least the following One:

8. A system for controlling uplink closed loop transmit diversity, the system comprising a radio network controller, a node B, and a user equipment;

The system according to claim 8, wherein the radio network controller is further configured to: indicate, by using signaling that includes activation indication information, that the user equipment activates/deactivates the uplink closed-loop transmit diversity, and triggers the user equipment to receive the The activation indication information knows whether the uplink closed-loop transmit diversity is activated, and performs corresponding data processing accordingly.

10. The system according to claim 9, wherein

11. The system of claim 8 wherein

The system according to any one of claims 8 to 11, wherein when the user equipment performs the movement between the wireless network controllers, the wireless network controller is further configured to:

User equipment drift wireless network controller notification service wireless network controller sends control life Instructing to activate/deactivate the uplink closed loop transmit diversity, including: the drift radio network controller carries the activation indication information of the uplink closed loop transmit diversity in the message sent to the serving radio network controller, and the serving radio network controller receives the The activation indication information indicates that the user equipment activates/deactivates the uplink closed loop transmit diversity by signaling, and triggers the user equipment to perform corresponding data transmission accordingly.

13. The system according to claim 12, wherein

The activation information indicating that the drift radio network controller notifies the radio network controller of the uplink closed loop transmit diversity is that the existing lur interface (the interface between the serving radio network controller and the drift radio network controller) is already present. Message, or new message.

The system according to any one of claims 9 to 11, wherein the activation indication information of the uplink closed-loop transmit diversity is an indication field, which is used to indicate activation/deactivation according to different values, including at least the following One: