WO2011088638A1

WO2011088638A1 - Method and system for enabling terminal supporting multi-antenna working mode to access network

Info

Publication number: WO2011088638A1
Application number: PCT/CN2010/071209
Authority: WO
Inventors: 支周; 禹忠; 丁添添
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-01-21
Filing date: 2010-03-23
Publication date: 2011-07-28
Also published as: CN102137505A; CN102137505B

Abstract

A method and system for enabling a terminal supporting multi-antenna working modes to access a network are disclosed in the present invention, which are used for solving the problem of selection of multi-antenna working modes after a Long Term Evolution Advance (LTE-A) terminal accesses a Long Term Evolution (LTE) network or an LTE-A network using a single-antenna working mode or a multi-antenna working mode with smaller configuration because of the bad channel condition. A User Equipment (UE) with multi-antenna working modes adopts a rollback working mode to initiate a random access process; after successfully accessing the network, the UE reports the multi-antenna working modes supported by it to the network; after receiving the multi-antenna working modes reported by the UE, the network negotiates with the UE and determines a multi-antenna working mode supported by both of them. In the present invention, before synchronization access, the UE negotiates with a target base station and determines the multi-antenna working mode supported by both of them, so that reliability and effectiveness of cell handover in a multi-antenna system can be ensured, and the acceptable service quality of a certain degree can be maintained.

Description

Method and system for terminal accessing network supporting multi-antenna working mode

The present invention relates to a mobile communication system, and in particular, to a method and system for a terminal to support a multi-antenna operation mode, which is applicable to a 3GPP Long Term Evolution (LTE) system, LTE enhancement (LTE-Advance, LTE-A). System, Global Interoperability for Microwave Access (WiMAX) system and other mobile communication systems supporting multiple antennas. Background technique

In recent years, various theoretical studies have shown that the space-time signal processing technology of multi-input and multi-output systems using multiple antennas at the transmitting end and the receiving end can meet the high data rate and high spectral performance of various multimedia services in future wireless mobile communications. Requirements. Multi-antenna technology is one of the key technologies for future mobile communication standards, such as LTE (Long-Term Evolution Plan for the 3rd Generation Mobile Communications Partnership Program), 802.16e (American Institute of Electrical Engineers Broadband Access Standard), and Winner (European Future Communications Standard) ).

The basic multi-antenna mode of operation includes Transmit Diversity (TD), Spatial Multiplex (SM), and Beamforming (BF) or a hybrid application of three basic modes. Different antenna modes are required in different scenarios, such as transmit diversity and spatial multiplexing in the indoor, and beamforming technology in the open field. Therefore, different multi-antenna working modes need to be set for the base station antennas in different scenarios.

In the multi-antenna mobile communication, the user equipment needs to communicate with the target base station through a certain mechanism, and determines a multi-antenna working mode supported by both parties before the formal handover, thereby improving the stability of the multi-antenna working mode switching process. And maintain a certain acceptable quality of service, but the current protocol does not provide a method of multi-antenna working mode selection in cross-cell handover. Summary of the invention

In view of the above, the main objective of the present invention is to provide a method and system for a terminal to access a network supporting a multi-antenna operation mode, which is used to solve the problem that the LTE-A terminal accesses the LTE network or the LTE-A network, and the channel condition is not The technical problem of multi-antenna working mode selection after the LTE-A terminal accesses the network using the single antenna or smaller multi-antenna working mode.

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

A method for a terminal supporting a multi-antenna working mode to access a network includes:

A user equipment having a multi-antenna working mode initiates a random access process by using a back-off working mode;

After the user equipment successfully accesses the network, the multi-antenna working mode supported by the user equipment is reported to the network; after receiving the multi-antenna working mode reported by the user equipment, the network negotiates with the user equipment to determine a multi-antenna working mode supported by both parties;

The user equipment reestablishes a connection with the base station using the multi-antenna mode of operation determined by the negotiation.

Further, the back-off working mode is a single-multiple antenna working mode or a single-antenna working mode agreed with the network.

Further, the user equipment reports the supported multi-antenna working mode to the network through the high layer signaling or the physical layer signaling, and the network notifies the user equipment of the multi-antenna working mode determined by the negotiation through the high layer signaling or the physical layer signaling.

Further, the user equipment reports the supported multi-antenna working mode to the network through the cell of the radio resource control signaling.

Based on the above method, the present invention also provides a system for a terminal access network supporting a multi-antenna working mode, including:

a user equipment, configured to initiate a random access procedure by using a back-off working mode; reporting the multi-antenna working mode supported by the base station after accessing the network; and using the multi-antenna working mode determined by the negotiation notified by the base station The multi-antenna working mode determined by negotiation and the base station reconstruction The working mode of the back-off is a single-antenna multi-antenna working mode or a single-antenna working mode agreed with the network.

The base station is configured to: after receiving the multi-antenna working mode reported by the user equipment, negotiate with the user equipment to determine a multi-antenna working mode supported by the two devices, and notify the user equipment of the multi-antenna working mode determined by the negotiation, The user equipment performs data transmission using the multi-antenna working mode determined by the negotiation.

Further, the user equipment reports the multi-antenna working mode supported by the user equipment to the base station through the high layer signaling or the physical layer signaling, and the base station notifies the user equipment of the multi-antenna working mode determined by the negotiation through the high layer signaling or the physical layer signaling.

The invention selects a multi-antenna working mode supported by both access parties by performing multi-antenna working mode negotiation between the user equipment and the target base station before the synchronous access, thereby ensuring the reliability and effectiveness of the cell switching in the multi-antenna system, and maintaining A certain degree of acceptable quality of service. DRAWINGS

FIG. 1 is a flowchart of a single antenna access method for supporting a multi-antenna working mode user equipment according to an embodiment of the present invention;

2 is a multi-antenna initial mode access procedure for supporting a multi-antenna working mode user equipment according to an embodiment of the present invention. detailed description

The basic idea of the present invention is: When a user equipment having a multi-antenna working mode accesses a cell, a working mode of back-off is adopted, for example, the user equipment has 4 antennas, but only one or two of the initial accesses are used. The antenna works. When the multi-antenna terminal or the user equipment (UE) works in the LTE-A network, the fallback configuration is a default configuration. This scenario is random. During the access process, the user equipment is regarded as an LTE user equipment by the network. After successful random access, the user equipment notifies the multi-antenna capability to the network, and the base station determines the multi-antenna working mode supported by both sides according to the multi-antenna capability of the user equipment, and the user equipment. The network can negotiate the multi-antenna working mode through high-level signaling or physical layer signaling. The end user equipment uses the multi-antenna working mode determined by negotiation to reestablish the connection with the base station to start data transmission. The access method of the present invention includes a process in which the multi-antenna terminal initially accesses the network, negotiates with the network for multi-antenna operation mode, and finally establishes a connection with the network by using the multi-antenna working mode determined by negotiation. The random access procedure of the release 8 protocol version can be maintained by the method of the present invention.

The present invention will be further described in detail below with reference to the accompanying drawings.

Example 1

FIG. 1 is a flowchart of a user equipment supporting a multi-antenna working mode adopting a single antenna working mode to access a network according to the present invention;

Step 101: The multi-antenna working mode user equipment initiates a random access procedure, and initially accesses the network in a single antenna working mode.

Step 102: After the user equipment successfully accesses the network, report the supported multi-antenna working mode to the network, and the user equipment can report the supported multi-antenna working mode to the network through high-level signaling or physical layer signaling.

For example, the user equipment can report its supported multi-antenna working mode to the network through an Information Element (IE) in Radio Resource Control (RRC) signaling.

Step 103: After receiving the multi-antenna working mode reported by the user equipment, the base station notifies the multi-antenna working mode determined by the user equipment through negotiation through high-layer signaling or physical layer signaling, and determines the multi-antenna working mode determined by the negotiation. Multi-antenna mode of operation supported by both network and user equipment. Step 104: After receiving the multi-antenna working mode of the network notification, the user equipment reestablishes the connection with the base station by using the multi-antenna working mode determined by the negotiation, and then starts data transmission.

In this embodiment, the single antenna working mode is used for access, and then after the network negotiation determines the multi-antenna working mode, the user terminal switches to the multi-antenna working mode determined by the negotiation, which has the advantage that the random access process of Release 8 can be maintained. .

Example 2:

2 is a flowchart of a user equipment supporting a multi-antenna working mode initially accessing a network in a multi-antenna working mode according to the present invention. In this embodiment, a user equipment accesses a single-antenna multi-antenna working mode agreed with a network during initial access. The network makes full use of the diversity gain to improve the reliability of access to edge users.

Step 201: The user equipment accesses the network in an initially agreed multi-antenna working mode, for example, a 2 antenna (2TX) 2 antenna (2RX) mode.

The initially agreed multi-antenna mode of operation should be a single-single multi-antenna mode of operation supported by both the network and the user equipment. With such an initial access mode, the user equipment can obtain multi-antenna diversity gain during initial access.

Step 202: After the user equipment accesses the network, report the supported multi-antenna working mode to the network. The user equipment can report the multi-antenna working mode supported by the network to the network through high layer signaling or physical layer signaling.

Step 203: After receiving the multi-antenna working mode reported by the user equipment, the base station determines, by mode negotiation, a new multi-antenna working mode supported by both parties, and then notifies the user equipment to negotiate the determined multi-antenna working mode.

Correspondingly, the base station can notify the user equipment to negotiate the determined multi-antenna working mode through high layer signaling or physical layer signaling.

Step 204: After receiving the multi-antenna working mode of the network notification, the user equipment uses the multi-antenna working mode determined by the negotiation to reestablish the connection with the base station, and starts data transmission. For example, the user equipment reports its maximum capability to the network as 4 antenna transmission (4Tx); the base station considers the channel condition, determines that the multi-antenna working mode that the user equipment can use is 4 antenna transmission, 8 antenna reception (4Tx 8Rx ), and passes the high-level letter. The user equipment is notified, and after receiving the multi-antenna working mode of the network notification, the user equipment may send data to the base station according to the 4TX mode, and the base station transmits data in the multi-antenna working mode of 4Tx 8Rx.

Based on the above method, the system for supporting a terminal supporting a multi-antenna working mode to access a network includes:

a user equipment, the user equipment supports a multi-antenna working mode, and is used to initiate a random access procedure by using a back-off working mode; after the network is accessed, the multi-antenna work supported by the base station is reported to the base station through high-level signaling or physical layer signaling. Mode

The base station is configured to: after receiving the multi-antenna working mode reported by the user equipment, negotiate with the user equipment to determine a multi-antenna working mode supported by both parties, and negotiate multi-antenna work through high-layer signaling or physical layer signaling. The mode is notified to the user equipment.

The working mode of the back-off is a single-antenna multi-antenna working mode or a single-antenna working mode agreed with the network.

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 a terminal supporting a multi-antenna working mode to access a network, characterized in that:

2. The method according to claim 1, wherein the retracting working mode is a single antenna working mode or a single antenna working mode agreed with the network.

The method according to claim 2, wherein the user equipment reports its supported multi-antenna working mode to the network through high layer signaling or physical layer signaling, and the network will use high layer signaling or physical layer signaling. The multi-antenna mode of operation determined by negotiation is notified to the user equipment.

The method according to claim 2, wherein the user equipment reports the multi-antenna working mode supported by the user through the cell of the radio resource control signaling to the network.

5. A system for a terminal to access a network supporting a multi-antenna working mode, characterized in that:

a user equipment, configured to initiate a random access procedure by using a back-off working mode; reporting the multi-antenna working mode supported by the base station after accessing the network; and using the multi-antenna working mode determined by the negotiation notified by the base station Determining the multi-antenna working mode determined by the negotiation and reestablishing the connection with the base station;

The base station is configured to: after receiving the multi-antenna working mode reported by the user equipment, negotiate with the user equipment to determine a multi-antenna working mode supported by both parties, and negotiate the determined multi-antenna working mode. Notifying the user equipment.

The system according to claim 5, wherein the working mode of the back-off is a single-antenna multi-antenna working mode or a single-antenna working mode agreed with the network.

The system according to claim 5, wherein the user equipment reports the supported multi-antenna working mode to the base station through high layer signaling or physical layer signaling, and the base station uses high layer signaling or physical layer signaling. The multi-antenna mode of operation determined by negotiation is notified to the user equipment.

8. The system according to claim 5, wherein the user equipment reports its supported multi-antenna working mode to the network through a cell of the radio resource control signaling.