WO2010040282A1

WO2010040282A1 - Communication method in multi-carrier mobile communication system, base station and communication system

Info

Publication number: WO2010040282A1
Application number: PCT/CN2009/001130
Authority: WO
Inventors: 胡南; 王军; 闫志刚; 崔春风
Original assignee: 中国移动通信集团公司
Priority date: 2008-10-10
Filing date: 2009-10-09
Publication date: 2010-04-15
Also published as: CN101730313A

Abstract

A communication method in a multi-carrier mobile communication system includes: determining the geographic location of the first transmitting antenna which belongs to the first carrier of the base station (210); transversely moving the determined geographic location of the first transmitting antenna according to a preset distance, then obtaining the geographic location of the second transmitting antenna which belongs to the second carrier of the base station (220); sending the first carrier with the first transmitting antenna, and sending the second carrier with the second transmitting antenna (230). A base station and communication system are also provided. According to the invention, the data rate of users located at cell edges is improved, while the consistency of service quality in different geographic areas is also improved, and the implementation process is simple.

Description

Communication method, base station and communication system in multi-carrier mobile communication system

The present invention relates to the field of wireless technologies, and in particular, to a communication method, a base station, and a communication system in a multi-carrier mobile communication system. Background technique

The data rate provided by the mobile communication system for the cell center and the cell edge user is very different. The data rate enjoyed by the cell center user is much higher than the data rate enjoyed by the cell edge user. Therefore, the service experience of the cell edge user is much lower than that of the cell. The service experience of the central user. For the actual operation of the network, if you want to obtain high user satisfaction, you must consider improving the quality of service to the cell edge users, that is, increasing the data rate provided to the cell edge users, and multi-carrier technology as the service quality of the cell edge users. Key technologies have been applied, such as multi-carrier time division high speed downlink packet access (TD-HSDPA, Time Division-High Speed Downlink Packet Access), HSDPA dual-carrier (Dual Cell) and longer-term evolution (LTE-Advanced, Long Term). Carrier-aggregation of Evolution-Advanced is a multi-carrier technology.

In the current multi-carrier mobile communication system, the configuration of the carrier and the antenna is multi-carrier overlapping coverage (for example, the dual cell in HSDPA adopts this method), that is, the transmitting antennas of different carriers belonging to the same base station are co-located (or transmitted). The antenna is the same. Figure 1 shows a schematic diagram of a configuration method using a dual-carrier overlapping coverage mode in the case of a simplified omnidirectional antenna. As shown in Figure 1, in this configuration mode, it belongs to the same base station (NodeB). The transmit antennas of different carriers are co-located, that is, all carriers are transmitted on each transmit antenna. Compared with the single-carrier mobile communication system, the multi-carrier mobile communication system configured by this scheme can approximately double the data rate of the cell edge users and improve the service experience of the users at the edge of the area.

However, although the scheme improves the data rate of the cell edge user through multi-carrier aggregation, since the transmitting antennas of different carriers of the same base station are shared (or co-located), the cell is also simultaneously The data rate of the central user is multiplied, resulting in a difference between the two. For example, when the mobile communication system adopts N-carrier aggregation overlap coverage, the data rate of the cell edge user and the cell center user can be approximated by N times, and the data rate difference provided in the entire cell is compared with that of the single carrier ( Variance) is an increase of N ² times. It can be seen that although the multi-carrier overlap coverage increases the data rate of the cell edge users, it increases the difference of the services provided by the network in different geographical areas, and the service consistency of the mobile communication system in the geographical area is deteriorated. For the actual operation of the network, it is very important to provide services with consistent shields in different geographical areas. This is because when the user moves from the central area of the cell to the edge of the cell, the significant drop in the data rate obtained will result in The rapid increase in user dissatisfaction.

In addition, in LTE-Advanced, relay technology is also being studied as a solution to the problem of low cell edge data rate. The Relay technology mainly arranges some relay stations at the edge of the cell, and when the user moves to the cell edge area, it connects with the relay station, and then the relay station transmits the data back to the base station. However, the relay stations arranged sometimes need to have more complicated functions, so the implementation process is more complicated. Summary of the invention

Embodiments of the present invention provide a communication method in a multi-carrier mobile communication system, which is used to improve the consistency of service quality in different geographical areas while improving the data rate of the 'J, the area edge user, and the implementation process is relatively simple.

Correspondingly, an embodiment of the present invention further provides a base station and a communication system.

An embodiment of the present invention provides a communication method in a multi-carrier mobile communication system, including: determining a geographic location of a first transmit antenna of a first carrier that belongs to a base station;

And translating the determined geographical position of the first transmit antenna by a preset distance to obtain a geographic location of the second transmit antenna of the second carrier belonging to the base station;

Transmitting a first carrier by using the first transmit antenna, and transmitting a second carrier by using the second transmit antenna.

An embodiment of the present invention provides a base station, including: a first transmit antenna, configured to send a first carrier;

a second transmit antenna, configured to send a second carrier;

The geographic location of the second transmit antenna is a predetermined distance from the geographic location of the first transmit antenna.

An embodiment of the present invention provides a communication system, including a plurality of base stations, where each base station includes: a first transmit antenna, configured to send a first carrier;

a second transmit antenna, configured to send a second carrier;

In the embodiment of the present invention, the geographic location of the second transmit antenna of the second carrier belonging to the same base station is obtained by shifting the geographic location of the first transmit antenna of the first carrier belonging to the base station by a preset distance, that is, different carriers belonging to the same base station. Transmitting antennas are in different geographical locations, and then transmitting the first carrier by using the first transmitting antenna, and transmitting the second carrier by using the second transmitting antenna, so that the data rate of the cell edge user of a certain carrier is increased, and This complementary superposition of data rates improves the consistency of service quality in different geographical areas. In addition, since the arrangement of the antenna is much simpler than the arrangement of the relay station, the implementation process is relatively simple. DRAWINGS

1 is a schematic diagram of a configuration method of a dual-carrier overlapping coverage mode in the prior art; FIG. 2 is a schematic flowchart of a communication method in a multi-carrier mobile communication system according to an embodiment of the present invention; FIG. 3 is provided in the embodiment of the present invention. Schematic diagram of a carrier and antenna configuration method for a multi-carrier mobile communication system;

4 is a schematic diagram of determining a geographical location of all transmit antennas corresponding to a first carrier in an LTE-Advanced system according to an embodiment of the present invention;

5A is a schematic diagram of determining a geographic location of all transmit antennas corresponding to a second carrier in an LTE-Advanced system according to an embodiment of the present invention;

FIG. 5B is a schematic diagram of determining a second carrier in an LTE-Advanced system according to an embodiment of the present invention; Another schematic diagram of the geographic location of all transmit antennas;

6 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a communication system according to an embodiment of the present invention. detailed description

In order to solve the problem in the prior art, in order to improve the data quality of the cell edge users, improve the consistency of the service quality in different geographical areas, and make the implementation process relatively simple, the embodiment of the present invention provides a multi-carrier mobile. The communication method in the communication system, the carrier is bound to the transmitting antenna, that is, each transmitting antenna belongs to only one carrier, one carrier can correspond to multiple transmitting antennas, and in determining the geographical position of the transmitting antenna of one carrier belonging to the base station In addition, after the preset distance is translated, the geographical position of the transmitting antenna of another carrier belonging to the same base station is obtained, thereby implementing multi-carrier partial overlapping coverage, and transmitting different carriers by using different geographically-transmitted transmitting antennas.

The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in FIG. 2, it is a schematic flowchart of a communication method in a multi-carrier mobile communication system according to an embodiment of the present invention, and the specific steps are as follows:

Step 210: Determine a geographic location of the first transmit antenna of the first carrier that belongs to the base station. Step 220: Translate the determined geographic location of the first transmit antenna by a preset distance to obtain a second transmit of the second carrier belonging to the base station. The geographical location of the antenna;

Step 230: Send a first carrier by using the first transmit antenna, and send a second carrier by using the second transmit antenna.

The first transmitting antenna is bound to the first carrier of the base station, and the second transmitting antenna is bound to the second carrier of the base station, and the geographical locations of the transmitting antennas corresponding to different carriers of the base station are different. Transmitting different carriers based on different geographically-transmitted transmitting antennas can improve the data quality of the cell edge users and improve the consistency of service quality in different geographical areas, and the implementation process is relatively simple.

For all the base stations in the network, the method of step 210 and step 220 above may be used. The configuration of the row carrier and the antenna, preferably, the determined geographical distance of the first transmitting antenna of the first carrier of each base station is shifted by a preset distance in the same direction, and the second wave of each base station can be obtained. The geographic location of the two transmit antennas, thereby realizing the overall translation of the cell topology of the entire first carrier, and avoiding re-determining the coverage of each cell for the second carrier.

Preferably, the preset distance is a distance from a cell center of the first carrier of the base station to a cell boundary. In this way, the cell center of the first carrier is also the cell boundary of the second carrier; the cell boundary of the first carrier is also the cell center of the second carrier, thus realizing the complement of the data rate of the cell boundary and the cell center. Superimposition not only improves the data rate of users at the edge of the cell, but also improves the consistency of service quality in different geographical areas.

Certainly, the preset distance may also be any value greater than zero and smaller than the cell center-to-cell boundary distance, as long as the transmit antenna corresponding to the second carrier belonging to the same base station and the transmit antenna corresponding to the first carrier are located in different geographical locations. That is, as long as this condition is met, the complementary superposition of data rates in the same geographical area of the network can be realized, and the consistency of service quality in different geographical areas can be improved.

FIG. 3 is a schematic diagram showing a carrier and antenna configuration method in a multi-carrier mobile communication system according to an embodiment of the present invention. The multi-carrier mobile communication system is assumed to adopt an omnidirectional antenna and two carriers. Wherein, a certain geographical area within the coverage of the system belongs to the center of the cell of a certain carrier, and at the same time belongs to the cell boundary of another carrier.

The specific implementation process of the embodiment of the present invention is described in detail by taking the above communication method in the LTE-Advanced system as an example. The specific steps are as follows:

Step 1: Select a certain carrier (first carrier) of the multi-carrier of the system, and determine the geographic location of all the transmitting antennas corresponding to the carrier that belong to each base station, where the existing single carrier system networking method can be used. The geographic location of the transmitting antenna is determined, for example, by referring to the LTE-R8 or LTE-R9 networking method, and the geographical locations of all the transmitting antennas corresponding to the determined carrier are as shown in FIG. 4 . The transmit antennas of the base stations of the respective cells are denoted by al-a7 (here, the formed network is composed of 7 cells).

Step 2: Select another carrier (second carrier) of the multi-carrier of the system, and the previous step is The predetermined geographical distance of the transmitting antenna of the first carrier is shifted by a preset distance in the same direction. Preferably, the preset distance is a distance from a cell center to a cell boundary of the first carrier of the base station, thereby obtaining a The geographical position of all the transmitting antennas corresponding to the two carriers is as shown in FIG. 5A. In the figure, the transmitting antenna is represented by a letter plus a number, different letters represent different carriers, and different numbers represent different base stations, that is, letters. Transmit antennas with different numbers belong to the same carrier of different base stations, and transmit antennas with the same letter and different numbers belong to different carriers of the same base station.

When the preset distance is greater than zero and less than the value of the cell center-to-cell boundary distance, the geographical locations of all the transmit antennas corresponding to the second carrier of each base station are as shown in FIG. 5B. As can be seen from FIG. 5B, as long as the geographical position of the transmitting antenna of the first carrier is shifted by a certain distance in the same direction, partial overlapping coverage of multiple carriers can be realized, and the data rate of the cell edge user can be improved while improving. Consistency of service shields in different geographic regions.

Step 3: Repeat step 2 until all carriers and transmit antennas of the system are configured. Step 4. Use different transmit antennas to transmit different carriers.

The foregoing is only an LTE-Advanced system as an example to describe a specific implementation manner of the embodiment of the present invention. However, the communication method in the multi-carrier mobile communication system provided by the embodiment of the present invention is applicable not only to the LTE-Advanced system but to all Multi-carrier mobile communication system.

The different carriers belonging to the same base station mean that the geographical positions of the transmitting antennas corresponding to different carriers are different, and the baseband processing and the high-level resource management are all completed in the same base station. Compared with the multi-carrier mobile communication system adopting the carrier overlap cover configuration method, the multi-carrier mobile communication system adopting the above-described carrier and antenna configuration method does not increase the number of base stations, but only binds the carrier to the transmit antenna. Moreover, the transmitting antennas are placed separately according to different geographical locations, and then the data transmission is performed based on the transmitting antennas that determine the geographical location. Therefore, not only the peak rate of the multi-carrier mobile communication system is improved, but also the data rate of the cell edge users is improved. It also improves the consistency of the network to provide service shields in different geographical areas.

Correspondingly, the embodiment of the present invention further provides a base station, which is configured as shown in FIG. 6, and includes: a first transmit antenna 610, configured to send a first carrier;

a second transmit antenna 620, configured to send a second carrier; The geographic location of the second transmit antenna 620 is a predetermined distance from the geographic location of the first transmit antenna 610.

Preferably, the preset distance is a distance from a cell center of the first carrier to a cell boundary.

Correspondingly, an embodiment of the present invention further provides a communication system, as shown in FIG. 7, including a plurality of base stations, each of which includes:

a first transmit antenna, configured to send a first carrier;

a second transmitting antenna, configured to send a second carrier wave;

The geographic location of the second transmit antenna is a predetermined distance from the geographic location of the first transmit antenna, that is, the geographic position of the first transmit antenna is shifted by a preset distance, and the geographic location of the second transmit antenna can be obtained. position.

Preferably, the preset distance is a distance from a cell center of the first carrier to a cell boundary. Of course, the preset distance may also be any value greater than zero and smaller than the cell center-to-cell boundary distance of the first carrier.

Data communication based on the above communication system can improve the consistency of service quality in different geographical areas while improving the data rate of the cell edge user.

The communication method in the multi-carrier mobile communication system provided by the embodiment of the present invention does not increase the number of base stations compared with a single carrier when performing multi-carrier cell coverage planning, but uses different carriers belonging to the same base station. The transmitting antennas are separately arranged to achieve partial overlapping of cells of different carriers, and the transmitting antennas based on the antennas arranged in this way can balance the data rates available in different geographical areas within the coverage of each base station, thereby improving the data of the users at the cell edge. At the same time, the consistency of service quality in different geographical areas is improved, and the implementation process of arranging antennas is relatively easy.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Rights request

A communication method in a multi-carrier mobile communication system, comprising: determining a geographic location of a first transmit antenna of a first carrier belonging to a base station;

And transmitting the first carrier by using the first transmit antenna, and transmitting the second carrier by using the second transmit antenna.

The method according to claim 1, wherein, for all base stations in the network, the determined geographical position of the first transmit antenna of the first carrier of each base station is translated by a preset distance in the same direction, The geographic location of the second transmit antenna of the second carrier of each base station.

The method according to claim 1 or 2, wherein the preset distance is a distance from a cell center of the first carrier of the base station to a cell boundary.

4. A base station, comprising:

a first transmit antenna, configured to send a first carrier;

a second transmit antenna, configured to send a second carrier;

The base station according to claim 4, wherein the preset distance is a distance from a cell center of the first carrier to a cell boundary.

A communication system, comprising: a plurality of base stations, wherein each base station comprises: a first transmit antenna, configured to send a first carrier;

a second transmit antenna, configured to send a second carrier;

7. The system according to claim 6, wherein the preset distance is a distance from a cell center of the first carrier to a cell boundary.