WO2012155548A1

WO2012155548A1 - Method and system for controlling uplink closed loop transmit diversity

Info

Publication number: WO2012155548A1
Application number: PCT/CN2012/070996
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: CN102957465A

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 user plane an uplink frame for instruction of activating/deactivating uplink closed loop transmit diversity. The technology of the present invention for controlling uplink closed loop transmit diversity can activate/deactivate uplink closed loop transmit diversity when a user equipment is only provided with a dedicated channel.

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, the Node B decides and sends an uplink frame indicating activation/deactivation of the uplink closed-loop transmit diversity to the radio network controller user plane.

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 carrying 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 according to the information. .

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 indication field is used as the activation indication information in the uplink frame (uplink dedicated channel control/data frame) sent by the Node B to the radio network controller. The method further includes: the user equipment's drift radio network controller notifying the serving radio network controller to send the user plane frame 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 user plane frame (user plane control/data frame) sent to the serving radio network controller.

A system for controlling uplink closed loop transmit diversity, the system comprising a radio network controller, a section

A , user equipment; among them,

The Node B is configured to: when the user equipment is configured with only the dedicated channel, determine and send an uplink frame for indicating activation/deactivation of the uplink closed-loop transmit diversity to the wireless network controller user plane.

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

The indication field is used as the activation indication information in the uplink frame (uplink dedicated channel control/data frame) sent by the node B to the radio network controller.

Wherein, when the user equipment performs the movement between the wireless network controllers, the wireless network controller is further configured to:

The drifting radio network controller of the user equipment notifies the serving radio network controller to transmit the user plane frame to activate/deactivate the uplink closed loop transmit diversity, including: the user plane frame (user plane) sent by the drift radio network controller to the serving radio network controller The control/data frame carries the activation indication information of the uplink closed-loop transmit diversity.

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;

1 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 drift radio network controller transmitting an uplink closed-loop transmit diversity to a serving radio network controller according to an embodiment of the present invention;

4 is a flow chart 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 uplink frame is further used for control. For example: Node B sends an uplink frame to the radio network controller user plane to indicate activation/deactivation of uplink closed-loop transmit diversity.

Moreover, the radio network controller can instruct the user equipment to activate/deactivate the uplink closed loop transmit diversity by signaling carrying the activation indication information. 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, an indication field may be used as the activation indication information in an uplink frame (uplink dedicated channel control/data frame) sent by the Node B to the radio network controller, and may be represented by a bit, and if set to 1, it indicates activation. Set to 0 to deactivate.

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

When the user equipment moves between the wireless network controllers, the drift wireless network controller of the user equipment can notify the serving radio network controller to send a user plane frame to activate/deactivate the uplink closed loop transmit diversity. Methods as below:

The drift radio network controller carries the activation indication information of the uplink closed-loop transmit diversity in the user plane frame (user plane control/data frame) sent to the serving radio network controller, which can be represented by a bit, and is set to 1 to indicate activation. , set to 0 to deactivate.

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 an uplink dedicated channel frame to the radio network controller, where the frame carries the 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. 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 carries the activation indication information of the uplink closed loop transmit diversity.

Step 201: The user equipment acquires activation indication information of the uplink closed-loop transmit diversity, and performs data coding according to 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, you can also use new messages. Such as activation instructions, etc.

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 an uplink dedicated channel frame to the serving radio network controller, where the frame carries the 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.

In practical applications, one bit can be extended in the extended idle bit (Spare Extension) in the transmitted frame to indicate the activation indication of the uplink closed-loop transmit diversity: 1 is active and 0 is deactivated.

Referring to FIG. 4, FIG. 4 illustrates a process for dynamically controlling the activation/deactivation of uplink closed loop transmit diversity by 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 and FIG. 5, the process of dynamically controlling the activation/deactivation of the uplink closed loop transmit diversity by the radio network controller is described. 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, 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.

It can be seen from the above embodiments that the system for controlling uplink closed loop transmit diversity of the present invention is wireless. The 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 an uplink frame indicating activation/deactivation of the uplink closed loop transmit diversity to the radio network controller user plane.

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

Claim

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 any one of claims 1 to 3, wherein

The indication field is used as the activation indication information in the uplink frame (uplink dedicated channel control/data frame) transmitted by the Node B to the radio network controller.

The method according to any one of claims 1 to 3, wherein, when the user equipment performs the movement between the wireless network controllers, the method further includes:

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

The Node B is configured to: when the user equipment only configures the dedicated channel, determine and send an uplink frame for indicating activation/deactivation of the uplink closed-loop transmit diversity to the radio network controller user plane.

The system of claim 6, wherein the radio network controller is further configured to: by means of signaling carrying the activation indication information, instruct the user equipment to activate/deactivate the uplink closed-loop transmit diversity, and trigger 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.

8. The system according to claim 7, wherein

9. The system according to any one of claims 6 to 8, wherein

10. The system according to any one of claims 6 to 8, wherein, when the user equipment performs movement between the wireless network controllers, the wireless network controller is further configured to: