WO2008104129A1

WO2008104129A1 - The bs, broadcast network, multi-mode terminal and the method for locating the blind zone in the broadcast network

Info

Publication number: WO2008104129A1
Application number: PCT/CN2008/070355
Authority: WO
Inventors: Qiyong Zhao; Yunhong Zhang; Hongyu Zhao
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-03-01
Filing date: 2008-02-25
Publication date: 2008-09-04
Also published as: CN101257339B; CN101257339A

Abstract

A broadcast network includes at least one broadcast BS with high power, and at least one broadcast BS with low power and /or broadcast repeater with low power. At least one broadcast BS with low power or broadcast repeater with low power share at least one of function of control, transmission, clock with the BS in non broadcast network. The broadcast BS with low power, the broadcast repeater with low power, the BS in non broadcast network, the method for reporting the measured information of the broadcast network, multi-mode terminal, the method for locating the blind zone in the broadcast network and the system for managing the network are also disclosed.

Description

Base station, broadcast network, multi-mode terminal and broadcast network blind spot location method The present application claims to be submitted to the Chinese Patent Office on March 1, 2007, the application number is 200710085354.0, and the invention name is "broadcast network, base station and broadcast network blind zone location method" Priority of Chinese Patent Application, the entire contents of which is incorporated herein by reference.

Technical field

The present invention relates to the field of wireless communications, and more particularly to broadcast technology.

Background technique

With the rapid spread of mobile multimedia services and the development of digital TV technology and networks, mobile TV has gradually become a hot topic in China. From the current application situation, the implementation of mobile TV can be mainly divided into the following types: The first one is based on terrestrial broadcasting, including digital video broadcasting in Europe (Digital Video Broadcasting-Handheld, DVB-H for short) " ) technology, South Korea's Digital Multimedia Broadcasting-Terrestrial ("DMB-T") technology, and Qualcomm's Media Flo technology; the second is based on satellite transmission, including South Korea's Satellite Digital Multimedia Broadcasting (S-DMB), China Mobile Multimedia Broadcasting (CMMB) technology; the third is mobile-based third-generation collaboration Project Organization (3rd Generation Partnership Project, referred to as "3GPP") Multimedia Broadcast/Multicast Service (MBMS) technology and streaming media technology.

Among them, the terrestrial and satellite broadcasting system is improved based on the traditional digital television broadcasting mode. A technology optimized for the handheld terminal can provide multiple video channels and audio channels simultaneously to the mobile handheld terminal using the battery.

The terrestrial and satellite broadcast systems have the following characteristics: The downlink one-way information broadcast mode, regardless of frequency reuse, and the entire area to transmit completely consistent content, can adopt the large-area coverage mode. That is to say, the coverage of a single cell in a broadcast type institutional network is larger than that of a conventional cellular network. Existing broadcast networks usually adopt a high-site, high-power, high-gain antenna to implement a large-area coverage mode and reduce the number of base stations in the network. At the same time as reducing costs, the large-area coverage model also brings an important problem, that is, there are a certain number of blind spots in the coverage area. In order to reduce the blind zone, the large-area network form of the broadcast type network is generally: the high-power broadcast base station assists a certain number of the same A frequency/inter-frequency low-power broadcast repeater or a low-power broadcast base station is used to achieve full coverage of the target area, as shown in FIG.

Generally, a network composed of a high-power base station is called a master station network, and a network composed of a co-frequency/inter-frequency low-power broadcast repeater or a low-power broadcast base station is called a blind-blind network. At present, in the construction process of the broadcast network supplemental blind network, the same-frequency/inter-frequency low-power broadcast repeater or the low-power broadcast base station exists as an independent physical entity in the broadcast network. However, the inventors of the present invention have found that constructing a co-frequency/inter-frequency low-power broadcast repeater or a low-power broadcast base station requires more room space, and needs to reset some independent functional units, CAPEX (investment cost). Both OPEX (operating costs) are high.

In addition, in the process of building a blind network, how to obtain blind zone information is also a concern of the people, but there is currently no good way to obtain blind zone information.

Summary of the invention

The main technical problem to be solved by the embodiments of the present invention is to provide a base station, a broadcast network, a multimode terminal, and a blind spot location method for a broadcast network, so that the construction cost of the blind network of the broadcast network can be reduced.

In order to solve the above technical problem, an embodiment of the present invention provides a low power broadcast base station, a baseband unit including at least one broadcast system for processing a baseband signal, and a radio frequency unit for broadcasting a radio frequency signal, wherein The baseband unit of the broadcast system and the baseband unit of the base station of the non-broadcast network share at least one of a master control, a transmission, and a clock.

Embodiments of the present invention provide a low power broadcast repeater including a radio frequency unit for processing a radio frequency signal, the radio frequency unit sharing a master control, a transmission, and a clock with a baseband unit of a base station of a non-broadcast network. At least one function of the baseband unit for processing a baseband signal.

An embodiment of the present invention provides a base station of a non-broadcast network, including a baseband unit of a non-broadcast system and a radio frequency unit of a non-broadcast system, where the base station of the non-broadcast network further includes a baseband unit of the low-power broadcast base station, where the small The baseband unit of the power broadcast base station and the baseband unit of the non-broadcast system share at least one of a master control, a transmission, and a clock, the baseband unit is configured to process a baseband signal, and the radio frequency unit is configured to process the radio frequency signal.

Embodiments of the present invention provide a base station of a non-broadcast network, including a baseband unit of a non-broadcast system and a radio frequency unit of a non-broadcast system, and the base station of the non-broadcast network further includes a radio frequency unit of a low-power broadcast repeater, the small The radio frequency unit of the power broadcast repeater shares the main unit with the baseband unit of the non-broadcast system. At least one of a function of controlling, transmitting, and clocking, the baseband unit is configured to process a baseband signal, and the radio frequency unit is configured to process a radio frequency signal.

Embodiments of the present invention provide a broadcast network including at least one of a high power broadcast base station, and a low power broadcast base station and a low power broadcast repeater, a low power broadcast base station or a low power broadcast repeater and At least one base station of the non-broadcast network shares at least one of a master, a transmission, and a clock.

The embodiment of the present invention further provides a method for reporting broadcast network signal measurement information, including: obtaining, by a non-broadcast network, an indication of a measurement broadcast network signal sent by a network side; measuring a broadcast network signal according to the indication; The network reports the measurement result of the broadcast network signal and the position information at the time of measurement to the network side.

An embodiment of the present invention provides a multimode terminal, including: an indication obtaining unit, configured to obtain, by using a non-broadcast network, an indication of a measurement broadcast network signal sent by a network side; and a signal measurement unit, configured to obtain a unit according to the indication Obtaining an indication, measuring a broadcast network signal; and an information reporting unit, configured to report, by the non-broadcast network, a measurement result of the broadcast network signal measured by the signal measurement unit and position information at the time of measurement to the network side.

An embodiment of the present invention provides a broadcast network blind spot location method, including: obtaining, by a non-broadcast network, a measurement result of a multimode terminal to a broadcast network signal and position information of the multimode terminal during measurement; according to the measurement result and location The information determines the location of the dead zone of the broadcast network.

An embodiment of the present invention provides a network management system, including: an information obtaining unit, configured to obtain, by using a non-broadcast network, a measurement result of a multimode terminal to a broadcast network signal and position information of a multimode terminal during measurement; a blind spot location determining unit And determining, by the measurement result and the location information obtained by the information obtaining unit, a blind spot location of the broadcast network.

Compared with the prior art, the main differences and effects of the embodiments of the present invention are as follows:

The low-power broadcast base station and/or the low-power broadcast repeater for supplemental blind sharing the master control, transmission and clock with the base station of the non-broadcast network, without reconfiguring the components providing the master control, transmission and clock functions, and reducing the broadcast network The cost of building a blinded network.

The most important difference between a low-power broadcast base station and a base station of a non-broadcast network is that the baseband processing is different. In the embodiment of the present invention, the baseband units of the low-power broadcast base station and the non-broadcast network base station still use their respective baseband processing logic, but Share master, transfer, and clock. Thereby reducing construction costs, Will not affect the original function of the base station.

The broadcast repeater in the prior art cannot perform network management and remote configuration due to a maintenance-free link.

OPEX is higher. Since the low-power broadcast repeater is mainly used for performing radio frequency signal processing, the embodiment of the present invention forms a low-power broadcast repeater in the form of a radio frequency unit, and shares the common control, transmission, and clock functions of the non-broadcast network base station. The module allows the remote repeater to be configurable, manageable, and trouble-shooting, and to obtain a stable clock source for high transmit frequency accuracy.

The multimode terminal measures the signal quality of the broadcast network, and the measurement result and the position information of the multimode terminal during the measurement are reported to the network side through the non-broadcast network, and the network side determines the blind spot position of the broadcast network according to the measurement result and the location information, thereby Blind zone positioning without increasing maintenance costs. DRAWINGS

1 is a schematic diagram of a large-area network in the prior art;

2 is a schematic diagram of a BBU interconnection of a broadcast network according to a first embodiment of the present invention; FIG. 3 is a schematic diagram of each BBU in a broadcast network connected to each RFU according to the first embodiment of the present invention;

4 is a schematic diagram of connecting BBUs in series with each RFU in a broadcast network according to a first embodiment of the present invention;

5 is a schematic diagram of an interface between multi-standard BBUs in a broadcast network according to a first embodiment of the present invention;

6 is a schematic diagram of a BBU chain type interconnection of a BBU and a GMU including a GMU in a broadcast network according to a first embodiment of the present invention;

7 is a schematic diagram of a BBU star interconnection of a BBU and a GMU including a GMU in a broadcast network according to a first embodiment of the present invention;

8 is a schematic diagram of a BBU bus type interconnection of a BBU and a GMU in a broadcast network according to a first embodiment of the present invention;

9 is a schematic diagram of a BBU ring type interconnection of a BBU and a GMU including a GMU in a broadcast network according to a first embodiment of the present invention;

10 is a schematic diagram of a switch-type interconnection between a BBU and a BBU including a GMU in a broadcast network according to the first embodiment of the present invention;

11 is a diagram showing a low power broadcast base station and a non-broadcast in a broadcast network according to a first embodiment of the present invention. Schematic diagram of a device sharing implementation scheme of a network base station;

12 is a schematic diagram of a feed station shared by a small power broadcast base station and a cellular network base station in a broadcast network according to a first embodiment of the present invention;

13 is a schematic diagram of a co-frequency broadcast repeater in a broadcast network according to a first embodiment of the present invention; FIG. 14 is a schematic diagram of an inter-frequency broadcast repeater in a broadcast network according to a first embodiment of the present invention; A schematic diagram of a connection between a broadcast repeater RFU and a non-broadcast network base station BBU in a broadcast network according to the first embodiment;

16 is a schematic diagram of an antenna feeder connection of an intra-frequency broadcast repeater RFU and a cellular base station RFU in a broadcast network according to a first embodiment of the present invention;

17 is a schematic diagram showing an antenna feed connection between an inter-frequency broadcast repeater RFU and a cellular base station RFU in a broadcast network according to a first embodiment of the present invention;

18 is a schematic diagram of an implementation scheme for device sharing between a broadcast repeater and a non-broadcast network base station in a broadcast network according to the first embodiment of the present invention;

19 is a flow chart of a blind spot location method for a broadcast network according to a second embodiment of the present invention.

detailed description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be further described in detail with reference to the accompanying drawings.

A first embodiment of the present invention relates to a broadcast network, including at least one high-power broadcast base station, and a low-power broadcast base station and a low-power broadcast repeater for supplementing the high-power broadcast base station, wherein The low-power broadcast base station or the low-power broadcast repeater shares at least one of the master control, the transmission, and the clock with the base station of the non-broadcast network. The master control, the transmission, and the clock can be provided by the common module, functionally, The common module can be a General Management Unit ("GMU"). By sharing the GMU, the construction cost of the blind network of the broadcast network is reduced.

The main performance of various base stations is shown in Table 1.

Master station network

The internet

Primary Network Secondary Network (gap filler)

Low power base

Equipment power, high power base station, same frequency repeater

Station

Power 1.5-10KW 5W-1.5KW 5-400W Antenna omnidirectional omnidirectional/directional omnidirectional orientation/omnidirectional table 1

At present, in addition to the broadcast-type network, traditional cellular networks can also provide mobile TV functions. For example, cellular networks such as 3GPP/3GPP2/ Worldwide Interoperability for Microwave Access (WiMAX) can provide on-demand and Multicast mobile TV programs. Due to deep coverage and capacity requirements, cellular networks such as 3GPP/3GPP2/WiMAX have undergone multiple cell splits, and today the sites are already very dense. Therefore, in the process of building a broadcast-type mobile TV network, if the resources of the cellular network are utilized, or if the low-power broadcast repeater or the low-power broadcast base station shares resources with the base stations of these cellular networks, it can be reduced. The cost of building a blind network in a broadcast network. In practical applications, the low-power broadcast repeater or the low-power broadcast base station can share the functions of master control, transmission, and clock with the base station of the cellular network, and can share the equipment room and peripheral equipment (power/air conditioner, etc.) with the base station of the cellular network. And facilities such as an antenna installation platform, a low-power broadcast repeater or a low-power broadcast base station may not need to provide functional units such as an operation and maintenance unit, a transmission unit, a clock unit, a main control unit, a machine rejection, and an antenna feed. The following describes the sharing mode of the small power broadcast base station, the low power broadcast repeater, and the non-broadcast network base station in the broadcast network.

In the present embodiment, the low power broadcast base station includes at least one baseband unit (BBU) for broadcasting a baseband signal, and a radio frequency unit (RFU) for broadcasting a radio frequency signal, wherein the broadcast system The baseband unit shares at least one of a master, a transmission, and a clock with a baseband unit of a base station of the non-broadcast network. The shared non-broadcast network base station includes at least one non-broadcast BBU, and at least one RFU. At least one of the functions of master, transmission, and clock can be provided by the GMU, and the GMU can be set to the baseband unit of the broadcast system.

The mode of sharing between the low-power broadcast base station and the non-broadcast network base station is as follows: The GMU is directly or indirectly connected to the broadcast system BBU and the non-broadcast BBU, and provides the master control, transmission, and clock to each BBU. Show. Since the GMU is usually existing in existing non-broadcast network base stations, it is not necessary to provide a dedicated module to provide master control, transmission, and clock when establishing a blind-blind network, thereby reducing network construction costs.

The above broadcast system includes: a long-term evolution project broadcast single frequency network (LTE SFN) system, a DVB-H system, a DMB-T system, a CMMB system, a Media Flo system, etc.; the non-broadcast system may include 3GPP, 3GPP2 defined Systems, as well as WiMAX standards, etc., such as global mobile Communication System (Global System for Mobile communication, referred to as "GSM") standard BBU, Code Division Multiple Access ("CDMA") standard BBU, Wideband Code Division Multiple Access (WCDMA) "), Long Term Evolution (LTE), Time Division Synchronous Code Division Multiple Access ("TD-SCDMA"), CDMA2000, personal hand-held telephone system ( Personal Handyphone System (referred to as "PHS"), trunking (Trunk), or Air Interface Evolution (AIE), etc., this embodiment does not apply to the BBU system included in the shared base station. limited.

Each of the above-mentioned BBUs includes an interconnection interface (the first interface), and each BBU is directly or indirectly connected to the GMU through an interconnection interface, and shares the master control, transmission, and clock provided by the GMU.

Each BBU further includes a baseband radio interface (second interface), and each BBU directly or indirectly connects to each RFU (including the RFU of the low-power broadcast base station and the RFU of the non-broadcast network base station), and transmits operation and maintenance information to each RFU. (O&M information) and baseband IQ data. Among them, IQ is a signal modulation method, I (in-phase) represents an in-phase signal, and Q (quarature) represents a quadrature signal.

Each BBU can be directly connected to the corresponding RFU through the baseband radio interface, thereby reducing the possibility of multiple BBUs failing at the same time due to the connection failure. As shown in FIG. 3, the BBU of the DVB-H system directly communicates with the DVB through the baseband radio interface. H system RFU connection, 3GPP standard BBU is directly connected to the 3GPP RFU through the baseband radio interface, and so on, each type of BBU is directly connected to the corresponding standard RFU through the baseband radio interface; or, each BBU passes the The two interfaces are connected in series with each RFU, and the same baseband RF channel is shared between the BBUs. This can further reduce the cost. As shown in Figure 4, the BBUs including the GMU and the BBUs in the CMMB mode are respectively connected through the baseband RF interface, CMMB. The BBU of the standard system and the BBU of the WiMAX system are respectively connected through the baseband radio frequency interface, and so on, the BBU of the 3GPP standard and the BBU of the DVB-H system are respectively connected through the baseband radio frequency interface, and the BBU of the DVB-H standard passes the baseband radio frequency interface and the 3GPP standard. RFU connection, 3GPP RFU and DVB-H RFU connection, DVB-H RFU and RFU standard connection. The connection shown in Figure 4 is particularly suitable for RFUs at the far end.

Of course, the above-mentioned interconnection interface and the baseband radio interface are logical interfaces, as shown in FIG. The interface for the main control function, the interface providing the transmission function, and the interface providing the clock function form an interconnection interface, and the interface providing the operation and maintenance O&M information and the interface providing the baseband IQ data form a baseband radio frequency interface. In practical applications, the interconnection interface and the baseband radio interface can also be combined into one interface. Through this interface, the cascade of GMU -> BBU - > RFU is implemented.

The GMU in this embodiment may be an independent physical unit, so that the GMU can be replaced separately when the GMU fails, and the maintenance cost is reduced; the GMU can also exist in a BBU as part of the BBU, thereby reducing the independence of the chassis. The need for space. The GMU or the BBU with GMU and the BBUs of various standards can be interconnected in a variety of ways, including chain, star, bus, ring, switch, etc., adding flexibility in actual configuration. The following is an example in which the GMU is used as a part of the BBU in a BBU.

Among them, the chain interconnection is as follows: As shown in Fig. 6, the BBU containing the GMU is at one end of the chain, and each BBU is connected in series on one chain.

The star interconnect is as shown in Figure 7. The BBUs with GMUs are connected to each BBU at the center.

The bus type interconnection is as follows: As shown in Figure 8, the BBU and each BBU with the GMU are connected to the same bus.

The ring interconnect is as follows: As shown in Figure 9, the BBU with the GMU and each BBU are connected in series on the same ring.

The switch-type interconnect is as follows: As shown in Figure 10, the BBUs and BBUs with GMUs are connected to the same switch.

It should be noted that the BBUs of the above-mentioned standards may not be in the form of a BBU box, for example, a single board, and each board may be interconnected through a backplane bus.

In practical applications, the low power broadcast base station can be set in a non-broadcast network base station. The base station of the non-broadcast network includes a baseband unit of a non-broadcast system and a radio frequency unit of a non-broadcast system, and further includes a baseband unit of the low-power broadcast base station, wherein the baseband unit of the low-power broadcast base station and the baseband unit of the non-broadcast system share the master At least one of control, transmission, and clock, the baseband unit is used to process the baseband signal, and the radio frequency unit is used to process the radio frequency signal.

Figure 11 is a schematic diagram of adding a BBU and an RFU of a small-power broadcast base station to a non-broadcast network base station in actual application, and sharing the master control, transmission, and clock of the GMU. There may be two cases, the first type. In the case, as shown in (a), the RFU of the low-power broadcast base station is built in the non-broadcast network base station, and the second case is as shown in (b), in the case where the existing base station has no extra space, the low-power broadcast base station The RFU can be externally placed in a non-broadcast network base station.

In addition to adding the BBU and RFU of the low-power broadcast base station to the non-broadcast network base station as shown in FIG. 11, it is also possible to set the BBU and RFU of the low-power broadcast base station in the machine rejection independent of the non-broadcast network base station. The GMU's master, transmission, and clock are shared with the base stations of the non-broadcast network through the interface between the machines.

In addition, the low-power broadcast base station can share the feeder line with the non-broadcast network base station in addition to the GMU. Specifically, the radio frequency unit of the broadcast system shares the feeder line with the radio frequency unit of the base station of the non-broadcast network, thereby further saving the network construction cost. Reduce the amount of engineering implementation.

Most of the existing non-broadcast network base stations are cellular network base stations. Since the frequency band of the small power broadcast base station and the cellular network base station are largely different, the antenna cannot be shared under normal circumstances, but the feeder sharing can be performed. Specifically, as shown in FIG. 12: after the RFV signals are output by different RFUs, the multi-band combiner is used to combine the broadcast network signal and the cellular network signal before being connected to the shared feeder; after outputting from the shared feeder, as in The transmitting antenna is installed, and the broadcast network signal and the cellular network signal are separated and restored by the multi-band splitter, and input to different transmitting antennas. Since the broadcast network only needs to perform downlink transmission, it is preferred to perform broadcast network signal transmission on the cellular network diversity feeder. In addition, the low-power broadcast base station can share power distribution, backup power, and monitoring resources with non-broadcast network base stations, thereby further saving costs.

The above describes the sharing mode of the low-power broadcast base station and the non-broadcast network base station in the broadcast network. The following describes the sharing mode of the low-power broadcast repeater and its non-broadcast network base station.

A low-power broadcast repeater for supplementing blindness, comprising a radio frequency unit for processing a radio frequency signal, wherein the radio frequency unit and the baseband unit of the base station of the non-broadcast network share at least one of a master control, a transmission, and a clock, The baseband unit is used to process the baseband signal. The low-power broadcast repeater includes two types: the same-frequency low-power broadcast repeater and the inter-frequency low-power broadcast repeater. The composition of the same-frequency low-power broadcast broadcast repeater is very simple, as shown in Figure 13, including the receive filter, low noise amplifier (LNA), surface acoustic filter (SAW), bandpass filter (BPF), amplifier (HPA). , Transmit filter, without the uplink of a typical cellular repeater. The inter-frequency broadcast repeater is shown in Fig. 14, and a frequency converter is added on the basis of the same-frequency low-power broadcast repeater. The low-power broadcast repeater of the prior art cannot perform network management and remote configuration due to the maintenance-free link, and the OPEX is high. In this embodiment, the low-power broadcast repeater is formed in the form of an RFU module, and is connected to a BBU of any non-broadcast network base station through a baseband radio frequency interface, and indirectly connects with the GMU of the non-broadcast network base station, as shown in FIG. The RFU of the DVB-H system is connected to the BBU of the 3GPP system, and the RFU of the DVB-H system is connected to the GBU of the 3GPP standard, the BBU of the 3GPP2 system, and the BBU of the WiMAX system, respectively. Alternatively, the GMU can be set up with an interconnect interface and a baseband radio interface to directly connect to the broadcast RFU. By sharing, the GMU of the non-broadcast network base station (which may be independent or included in the BBU) can provide the master, transmission, and clock to the low power broadcast repeater. The low-power broadcast repeater can obtain the O&M information through the baseband radio interface, so that the low-power broadcast repeater can be configured, managed, and trouble-solved. At the same time, the low-power broadcast repeater can obtain a unified and stable clock signal of the non-broadcast network base station from the baseband radio frequency interface, and obtain a stable power source from the non-broadcast network base station DC distribution unit, thereby obtaining a higher transmission frequency. The accuracy guarantees the excellent emission performance of the low-power broadcast repeater, and saves the clock extraction module and power conversion module required in the general low-power broadcast repeater, thereby reducing the cost.

Similar to the low-power broadcast base station, the RFU of the low-power broadcast repeater also needs to receive the main station network signal for downlink amplification, and needs to install the receiving and transmitting antennas, so the feeder can also be shared with the non-broadcast network base station to further save the network. Cost, reduce the amount of engineering implementation. After the RFV signals are output by different RFUs, the multi-band combiner is used to combine the broadcast network signal and the non-broadcast network signal before being connected to the shared feeder; after outputting from the shared feeder, as in the installation of the transmitting antenna, The band splitter separates and restores the broadcast network signal and the non-broadcast network signal and inputs them to different transmit antennas. Since the broadcast network only needs to perform downlink transmission, it is preferable to perform broadcast network signal transmission on the cellular network diversity feeder. By using a multi-band splitter, the feeders are shared without affecting the broadcast signal and the cellular network signal, saving CAPEX. Figure 16 is a schematic diagram showing the antenna feeder connection of the shared feeder of the same-frequency low-power broadcast repeater RFU and the cellular network base station RFU, and Figure 17 shows the shared feeder of the inter-frequency low-power broadcast repeater RFU and the cellular network base station RFU. The schematic diagram of the antenna feeder connection.

In practical applications, the RFU of the low power broadcast repeater can be set in the non-broadcast network base station. The base station of the non-broadcast network includes a non-broadcast baseband unit and a non-broadcast radio unit, Further, the radio frequency unit of the low power broadcast repeater is further included, and the radio frequency unit of the low power broadcast repeater and the baseband unit of the non-broadcast standard share at least one of the main control, the transmission, and the clock, and the baseband unit is used for processing. Baseband signal, the RF unit is used to process RF signals.

FIG. 18 is a schematic diagram of an RFU that adds a small power broadcast repeater to a non-broadcast network base station in actual application, and shares resources such as a master control, a transmission, and a clock of the GMU. There may be two cases. In the first case, as shown in (a), the RFU of the low-power broadcast repeater is built in the non-broadcast network base station, and the second case is as shown in (b). In the absence of excess space, the RFU of the low power broadcast repeater can be externally placed in the non-broadcast network base station. In addition, as with low-power broadcast base stations, low-power broadcast repeaters can also share power distribution, backup, and monitoring resources with non-broadcast network base stations, further reducing construction costs.

In addition to the RFU of the low-power broadcast repeater added to the non-broadcast network base station as shown in FIG. 18, the RFU of the low-power broadcast repeater can also be set in the machine rejection independent of the non-broadcast network base station. The GMU's master, transmission, and clock are shared with the base stations of the non-broadcast network through the interface between the machines.

A second embodiment of the present invention relates to a method for reporting broadcast network signal measurement information, a multimode terminal, a broadcast network blind spot location method, and a network management system.

The method for reporting the broadcast network signal measurement information may include: obtaining, by the non-broadcast network, an indication of the measurement broadcast network signal sent by the network side; measuring the broadcast network signal according to the indication; and reporting the measurement of the broadcast network signal to the network side by using the non-broadcast network Results and location information at the time of measurement.

The method for reporting the broadcast network signal measurement information may be implemented by a plurality of types of devices, where the multi-mode terminal may include: an indication obtaining unit, configured to obtain, by using the non-broadcast network, an indication of the measurement broadcast network signal sent by the network side; a signal measuring unit, configured to measure a broadcast network signal according to the indication obtained by the indication obtaining unit; and an information reporting unit, configured to report, by the non-broadcast network, the measurement result of the broadcast network signal measured by the signal measuring unit and the position information during the measurement to the network side The broadcast network blind spot locating method may include: obtaining, by the non-broadcast network, a measurement result of the multi-mode terminal to the broadcast network signal and position information of the multi-mode terminal at the time of measurement; determining a blind spot position of the broadcast network according to the measurement result and the location information; . The broadcast network blind spot locating method can be implemented by multiple forms of devices, and one of the network management systems includes: an information obtaining unit, configured to obtain a measurement result of the multi-mode terminal to the broadcast network signal through the non-broadcast network, and the multi-mode terminal is in the measurement The location information determining unit is configured to determine a blind spot location of the broadcast network according to the measurement result and the location information obtained by the information obtaining unit. The network management system may further include an indication sending unit, configured to send, by the non-broadcast network, a measurement indication of the measurement broadcast network signal to the multi-mode terminal.

In this embodiment, the multimode terminal measures the signal quality of the broadcast network, and reports the measurement result and the location information of the multimode terminal at the time of measurement to the network side functional entity through the non-broadcast network, and the network side functional entity is reported according to the The measurement result and location information determine the blind spot location of the broadcast network. The non-broadcast network may be a cellular network, at least one cell of the cellular network overlapping with the coverage of the broadcast network, and the network side functional entity is, for example, a network management system.

Specifically, as shown in FIG. 19, in step 1910, the network side sends a measurement indication through the cellular network. The measurement indication includes information to be reported, and a measurement result reporting method.

The reported information generally includes: the strength of the broadcast network signal, the location information at the time of measurement, and sometimes the signal strength of the cellular network at that location. In this embodiment, the reporting information of the measurement indication includes the signal strength of the cellular network corresponding to the location.

In the present embodiment, the network signal strength is divided into six levels, as shown in Table 2. After the terminal performs signal strength measurement, it only needs to report the corresponding level. The location information at the time of measurement may be a cellular network cell identity.

Table 2

There are two methods for reporting: event-triggered reporting mode and periodic reporting mode. The event triggering reporting mode can trigger the terminal to report the measurement only when the signal strength measured by the multimode terminal is lower than the preset threshold. As a result, of course, the event-triggered reporting mode may have other situations, which are not described here. The periodic reporting mode triggers the terminal to report the measurement result when the predetermined time is reached. The parameters that need to be set in the two modes are shown in Table 3. In the initial stage of the construction of the broadcast network, the use of the periodic method can quickly obtain the blind spot of the broadcast network. During the routine maintenance after the completion of the blind network, the event trigger can be used as needed to discover the local blind zone to reduce traffic. .

table 3

In this step, the measurement indication can be sent in two ways: broadcast delivery and short message delivery. If the broadcast delivery mode is adopted, in this step, the measurement indication of the cellular network may be periodically broadcasted by using the system message of the cellular network; if the short message delivery mode is adopted, the location update may be performed on the non-broadcast network by the multi-mode terminal. When the call is established or switched, the measurement indication is sent to the multimode terminal. The former method is more convenient for the network side and simpler to implement; the latter method is more efficient, and avoids long-term measurement to increase the terminal power consumption.

In step 1920, after receiving the measurement indication, the multimode terminal measures the signal strength of the broadcast network and the signal strength of the cellular network according to the indication.

In step 1930, the multimode terminal reports the measurement result and the location information at the time of measurement to the network side functional entity through the cellular network. If the reporting manner in the measurement indication is periodic reporting, in this step, when the predetermined time in the measurement indication is reached, the multimode terminal reports the signal strength measurement result of the broadcast network and the cellular network, and the location information during the measurement. If the reporting mode in the measurement indication is event triggering, in this step, the multimode terminal performs reporting only when the measured broadcast network signal strength is lower than the threshold in the measurement indication.

Corresponding to the manner in which the network side sends the measurement indication, the multi-mode terminal can report the information in two ways: If the network side sends the measurement indication through the short message, in this step, the multi-mode terminal can report the same through the short message. Information (including measurement results and location information) is replied to the cellular network, ie reply Sending the short message number of the measurement indication to the network side functional entity by the cellular network; or the multimode terminal transmitting the reporting information to the cellular network base station side in the signaling bearer result manner, and then the cellular network Provided to the network side functional entity.

Table 4 is an example of reporting by a multimode terminal. The multimode terminal reports the measured two broadcast network signal types and corresponding strengths, the signal strength of the cellular network, and the cell network cell identity to the network side functional entity.

Table 4

It should be noted that the reported information can also be optimized according to the network and terminal capabilities. For example, when the terminal supports precise positioning, the reported location information can be changed from the cell identifier to a specific geographic location.

In step 1940, the network side functional entity determines the blind spot location of the broadcast network according to the broadcast network signal strength measurement result and the location information reported by the multimode terminal. The network side functional entity can also predict the signal quality of the blind spot of the broadcast network after the blind spot is determined according to the measurement result of the signal strength of the cellular network.

In summary, in the embodiment of the present invention, the low power broadcast base station and/or the low power broadcast repeater for supplementing blindness and the base station of the non-broadcast network share at least one of the functions of master control, transmission, and clock. There is no need to reconfigure the components that provide at least one of the functions of the master, the transmission, and the clock, which reduces the construction cost of the blind network of the broadcast network.

The most important difference between the small power broadcast base station and the base station of the non-broadcast network is different. In the embodiment of the present invention, the baseband units of the low power broadcast base station and the non-broadcast network base station are still used. The respective baseband processing logic, but sharing the master, transmission, and clock. Therefore, while reducing the construction cost, it will not affect the original functions of the base station.

The low-power broadcast repeater in the prior art cannot perform network management and remote configuration due to a maintenance-free link, and the OPEX is high. Since the low-power broadcast repeater is mainly used for performing radio frequency signal processing, the embodiment of the present invention forms a low-power broadcast repeater in the form of a radio frequency unit, shares a common module of the non-broadcast network base station, and provides a master control through the common module. The transmission and clocking enable remote low-power broadcast repeaters to be configurable, manageable, and trouble-shooting, and to obtain a stable clock source for high transmit frequency accuracy.

The low-power broadcast base station or the low-power broadcast repeater shares the power distribution, backup power, and monitoring resources with the non-broadcast network base station, thereby further reducing the construction cost of the blind-blind network.

The common module can be a separate physical unit, which can replace the public module separately when the common module fails, reducing maintenance costs. Each baseband unit has a uniform function and is convenient for mass production. The common module can also be part of a baseband unit in each base station, thereby reducing the need for separate spaces in the chassis.

The common module and each baseband unit can be interconnected by various methods such as chain type, star type, bus type, ring type, and switching type, thereby increasing flexibility in actually configuring the base station.

Each of the baseband units can be separately connected to the radio frequency unit, thereby reducing the possibility of simultaneous failure of the plurality of baseband units due to connection failure. Each baseband unit can also be connected in series and then connected to the radio frequency unit, so that each baseband unit can share the same radio frequency line, which reduces the cost, and is particularly suitable for the radio unit at the remote end.

The radio unit of the low-power broadcast base station or the low-power broadcast repeater shares the feeder with at least one radio unit of the non-broadcast network base station, and the signals of the radio units are combined and input to the shared feeder, and the combined signals are output from the shared feeder and then restored to Multiple signals, which further saves network construction costs and reduces engineering implementation.

The multimode terminal measures the signal quality of the broadcast network, and reports the measurement result and the location information of the multimode terminal during measurement to the network side functional entity through the non-broadcast network, and the network side functional entity determines the broadcast network according to the measurement result and the location information. The location of the blind spot allows for blind spot positioning without increasing maintenance costs.

The non-broadcast network may be a cellular network, at least one cell of the cellular network and a broadcast network The coverage overlaps, so that even if the multimode terminal does not have a precise positioning function, the detection area can be located through the cell identity of the cellular network.

The network side can send a measurement indication through the cellular network, and after receiving the measurement indication, the multimode terminal performs measurement and reporting according to the information in the measurement indication. In addition, the network side can send measurement indications only when the multimode terminal performs location update, call setup, or handover to improve measurement quality and efficiency, and avoid long-term measurement to increase terminal power consumption.

The measurement indication may include a reporting period or a reporting threshold, and the terminal periodically reports the measurement result according to the reporting period, or the terminal reports when the measurement result is less than the reporting threshold (ie, the event is triggered). In the initial stage of the construction of the broadcast network, the use of the periodic method can quickly obtain the blind spot of the broadcast network. During the routine maintenance after the completion of the blind network, the event trigger can be used as needed to discover the local blind zone to reduce traffic. .

Although the invention has been illustrated and described with reference to the preferred embodiments of the present invention, it will be understood The spirit and scope of the invention.

Claims

OP070869 WO 2008/104129 PCT/CN2008/070355 - 17- Claims

A low-power broadcast base station, comprising: a baseband unit for at least one broadcast system for processing a baseband signal; and a radio frequency unit for broadcasting a radio frequency signal, wherein the baseband unit of the broadcast system and The baseband unit of the base station of the non-broadcast network shares at least one of a master, a transmission, and a clock.

The low power broadcast base station according to claim 1, wherein at least one of the master control, the transmission, and the clock is provided by a shared general management unit GMU.

The low power broadcast base station according to claim 2, wherein the GMU is provided in a baseband unit of the broadcast system or a baseband unit of a base station of the non-broadcast network.

The low-power broadcast base station according to claim 2, wherein the baseband unit of the broadcast system comprises an interconnection interface, and the baseband unit of the broadcast system is directly or indirectly connected to the GMU through the interconnection interface.

The low-power broadcast base station according to claim 1, wherein the baseband unit of the broadcast system comprises a baseband radio frequency interface, and the baseband unit of the broadcast system transmits the radio frequency to the broadcast system through the baseband radio frequency interface The unit transmission operation maintains O&M information and data of the baseband in-phase signal and the quadrature signal IQ.

The low power broadcast base station according to claim 1, wherein the radio frequency unit of the broadcast system shares a feeder with a radio frequency unit of a base station of a non-broadcast network.

The low-power broadcast base station according to claim 6, wherein the non-broadcast network is a cellular network, and a broadcast network signal sent by the radio unit of the broadcast system is transmitted on a cellular network diversity feeder.

The low-power broadcast base station according to claim 1, wherein the non-broadcast network is a global mobile communication system network, a code division multiple access network, a microwave access global interworking network, a wideband code division multiple access network, Time division synchronous code division multiple access network, code division multiple access system 2000 network, personal handy phone system network, cluster network, long term evolution network or air interface evolution network.

A low-power broadcast repeater, comprising: a radio frequency unit for processing a radio frequency signal, wherein the radio frequency unit shares a master control, a transmission, and a clock in a baseband unit of a base station of the non-broadcast network; At least one function, the baseband unit is for processing a baseband signal.

10. The low power broadcast repeater according to claim 9, wherein said master control and transmission OP070869

WO 2008/104129 PCT/CN2008/070355

- 18- At least one of the functions of the input and clock is provided by the shared universal management unit GMU.

The low-power broadcast repeater according to claim 9, wherein the radio frequency unit of the broadcast system comprises an interconnection interface, and the radio frequency unit of the broadcast system is connected to the GMU through the interconnection interface.

The low-power broadcast repeater according to claim 9, wherein the radio frequency unit of the broadcast system comprises a baseband radio frequency interface, and the radio frequency unit of the broadcast system passes the baseband radio frequency interface and the non-broadcast network The baseband unit of the base station is connected.

The low power broadcast repeater according to claim 12, wherein the radio frequency unit of the broadcast system acquires operation and maintenance O&M information and baseband in-phase signals and quadrature signal IQ data through the baseband radio frequency interface.

The low power broadcast repeater according to claim 12, wherein the radio frequency unit of the broadcast system acquires a clock signal or a power source from a base station of the non-broadcast network through the baseband radio frequency interface.

The low power broadcast repeater according to claim 9, wherein the radio unit of the broadcast system shares a feeder with a radio unit of a base station of the non-broadcast network.

The low power broadcast repeater according to claim 15, wherein the non-broadcast network is a cellular network, and a broadcast network signal sent by the radio unit of the broadcast system is transmitted on a cellular network diversity feeder.

The low power broadcast repeater according to claim 9, wherein the non-broadcast network is a global mobile communication system network, a code division multiple access network, a microwave access global interworking network, and a wideband code division multiple access. Network, time division synchronous code division multiple access network, code division multiple access system 2000 network, personal handy phone system network, cluster network, long term evolution network or air interface evolution network.

18. A non-broadcast network base station, comprising a non-broadcast baseband unit and a non-broadcast radio frequency unit, further comprising a baseband unit of the low power broadcast base station, wherein the baseband unit of the low power broadcast base station Sharing at least one of a master control, a transmission, and a clock with a baseband unit of a non-broadcast system for processing a baseband signal, the radio frequency unit for processing a radio frequency signal.

The base station of a non-broadcast network according to claim 18, wherein at least one of the functions of the master control, the transmission, and the clock is provided by a shared general management unit GMU.

The base station of the non-broadcast network according to claim 19, wherein the GMU is set OP070869

WO 2008/104129 PCT/CN2008/070355

- 19- placed in the baseband unit of the non-broadcast system.

The base station of a non-broadcast network according to claim 18, further comprising a radio unit of the low power broadcast base station.

The base station of the non-broadcast network according to claim 21, wherein the radio frequency unit of the low-power broadcast base station shares the feeder line with the radio frequency unit of the non-broadcast system.

The base station of the non-broadcast network according to claim 22, wherein the broadcast network signal sent by the radio unit of the low-power broadcast base station is transmitted on the cellular network diversity feeder.

The non-broadcast network base station according to claim 18, wherein the non-broadcast network is a global mobile communication system network, a code division multiple access network, a microwave access global interworking network, and a wideband code division multiple access network. , Time Division Synchronous Code Division Multiple Access Network, Code Division Multiple Access System 2000 Network, Personal Handyphone System Network, Cluster Network, Long Term Evolution Network or Air Interface Evolution Network.

25. A base station for a non-broadcast network, comprising a baseband unit of a non-broadcast system and a radio unit of a non-broadcast system, characterized in that it further comprises a radio unit of a low power broadcast repeater, said low power broadcast repeater The radio frequency unit shares at least one of a master control, a transmission, and a clock with a baseband unit of a non-broadcast system for processing a baseband signal, the radio frequency unit for processing a radio frequency signal.

The base station of a non-broadcast network according to claim 25, wherein at least one of the master control, the transmission, and the clock is provided by a shared general management unit GMU.

The base station of a non-broadcast network according to claim 26, wherein the GMU is placed in a baseband unit of the non-broadcast system.

The base station of the non-broadcast network according to claim 26, wherein the radio frequency unit of the low-power broadcast repeater comprises an interconnection interface, and the radio frequency unit of the broadcast system is connected to the GMU through the interconnection interface.

The base station of the non-broadcast network according to claim 25, wherein the radio frequency unit of the low power broadcast repeater comprises a baseband radio frequency interface, and the radio frequency unit of the low power broadcast repeater passes the baseband The radio frequency interface is connected to the baseband unit of the non-broadcast system.

The base station of the non-broadcast network according to claim 25, wherein the radio frequency unit of the low power broadcast repeater shares the feeder line with the radio frequency unit of the non-broadcast system.

The base station of the non-broadcast network according to claim 30, wherein the broadcast network signal sent by the radio unit of the low power broadcast repeater is transmitted on the cellular network diversity feeder. OP070869

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-20-

The non-broadcast network base station according to claim 25, wherein the non-broadcast network is a global mobile communication system network, a code division multiple access network, a microwave access global interworking network, and a wideband code division multiple access network. , Time Division Synchronous Code Division Multiple Access Network, Code Division Multiple Access System 2000 Network, Personal Handyphone System Network, Cluster Network, Long Term Evolution Network or Air Interface Evolution Network.

33. A broadcast network comprising at least one of a high power broadcast base station, and a low power broadcast base station and a low power broadcast repeater, characterized in that the low power broadcast base station or the low power broadcast repeater and the non-broadcast At least one base station of the network shares at least one of a master, a transmission, and a clock.

34. The broadcast network of claim 33, wherein at least one of the master, transport, and clock functions is provided by a shared general management unit GMU.

35. The broadcast network of claim 33, wherein the low power broadcast base station comprises at least one baseband unit for processing a baseband signal; the GMU is in direct or indirect manner with the broadcast system The baseband unit for processing the baseband signal is connected to the baseband unit for processing the baseband signal of the base station of the non-broadcast network, and provides mastering and transmission to the baseband unit of the broadcast system and the baseband unit of the base station of the non-broadcast network. At least one function in the clock.

36. The broadcast network of claim 34, wherein the low power broadcast repeater comprises a radio frequency unit for processing radio frequency signals;

The GMU is connected to the baseband unit for processing the baseband signal and the radio frequency unit of the low power broadcast repeater in the base station of the non-broadcast network in a direct or indirect manner, to the baseband unit and the base station of the non-broadcast network base station The radio unit of the low power broadcast repeater provides at least one of a master control, a transmission, and a clock.

The broadcast network according to claim 35 or 36, wherein the GMU is an independent physical unit, or the GMU is disposed in a baseband unit of a broadcast system or a baseband unit of a base station of a non-broadcast network.

The broadcast network according to claim 37, wherein the GMU as a separate physical unit and each baseband unit, and the baseband unit provided with the GMU and the baseband unit not provided with the GMU are respectively connected by one of the following methods:

Chain-type interconnection, wherein the GMU as a separate physical unit is connected to a baseband unit in a chain at one end of the chain, and the baseband unit provided with the GMU is connected at one end of the chain to a baseband unit not provided with the GMU. on; OP070869

WO 2008/104129 PCT/CN2008/070355

-21 - Star-shaped interconnection, in which the GMU as a separate physical unit is connected to each baseband unit at a central position, and the baseband unit provided with the GMU is centrally located, and is respectively connected to a baseband unit not provided with a GMU;

a bus type interconnect, wherein the GMU and the baseband units as separate physical units are respectively connected to the same bus, and the baseband unit provided with the GMU and the baseband unit not provided with the GMU are respectively connected to the same bus;

Ring-type interconnection, wherein the GMU as a separate physical unit is connected in series with each baseband unit on the same ring, and the baseband unit provided with the GMU and the baseband unit not provided with the GMU are connected in series on the same ring;

A switched type interconnect in which a GMU and a baseband unit as independent physical units are respectively connected to the same switch, and a baseband unit provided with a GMU and a baseband unit not provided with a GMU are connected to the same switch.

The broadcast network according to claim 33, wherein the low power broadcast base station or the low power broadcast repeater is disposed in a base station of the non-broadcast network.

The broadcast network according to claim 35 or claim 36, wherein the radio frequency unit of the low power broadcast base station or the low power broadcast repeater shares a feeder with at least one radio frequency unit of the base station of the non-broadcast network, The signals of the radio frequency units are combined and input to the shared feeder, and the combined signals are outputted from the shared feeder and restored to multiple signals.

The broadcast network according to claim 33, wherein the low power broadcast base station or the low power broadcast repeater shares at least one of power distribution, backup power, and monitoring with the base station of the non-broadcast network. .

The broadcast network according to claim 33, wherein the non-broadcast network is a global mobile communication system network, a code division multiple access network, a microwave access global interworking network, a wideband code division multiple access network, and a time division synchronization. Code division multiple access network, code division multiple access system 2000 network, personal handy phone system network, cluster network, long term evolution network or air interface evolution network.

43. A method for reporting broadcast network signal measurement information, comprising: obtaining, by a non-broadcast network, an indication of a measurement broadcast network signal sent by a network side; and measuring a broadcast network signal according to the indication;

Reporting the measurement result of the broadcast network signal and the bit at the time of measurement to the network side through the non-broadcast network OP070869

WO 2008/104129 PCT/CN2008/070355

-22- Set the information.

The method for reporting broadcast network signal measurement information according to claim 43, wherein, when the location update, the call setup or the handover is performed in the non-broadcast network, the indication of the measurement broadcast network signal sent by the network side is obtained.

The method for reporting broadcast network signal measurement information according to claim 43, wherein, if the indication of the measurement broadcast network signal includes a manner of reporting, reporting the broadcast network to the network side according to the reporting manner The measurement result of the signal and the position information at the time of measurement.

The method for reporting broadcast network signal measurement information according to claim 45, wherein the reporting manner is a periodic reporting manner or an event trigger reporting manner.

The method for reporting broadcast network signal measurement information according to claim 45, wherein the event triggering reported event is that the strength of the broadcast network signal is measured to be lower than a specified signal strength threshold.

The method for reporting broadcast network signal measurement information according to claim 43, wherein the measurement result of the broadcast network signal and the position information at the time of measurement are reported in a short message or a signaling bearer result.

The method for reporting broadcast network signal measurement information according to claim 43, wherein the measurement result of the broadcast network signal and the position information during the measurement are periodically reported to the network side by the non-broadcast network.

The method for reporting broadcast network signal measurement information according to claim 43, wherein, when measuring the broadcast network signal, the non-broadcast network signal is also measured, and the measurement result of the broadcast network signal and the position at the time of measurement are reported to the network side. When the information is received, the measurement result of the non-broadcast network signal is also reported.

51. A multimode terminal, comprising:

An indication obtaining unit, configured to obtain, by using a non-broadcast network, an indication of a measurement broadcast network signal sent by the network side;

a signal measuring unit, configured to measure a broadcast network signal according to the indication obtained by the indication obtaining unit;

The information reporting unit is configured to report, by the non-broadcast network, the measurement result of the broadcast network signal measured by the signal measurement unit and the position information at the time of measurement to the network side. OP070869

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-twenty three -

52. A method for locating a blind spot in a broadcast network, characterized in that it comprises:

Obtaining measurement results of the broadcast network signal by the multimode terminal and location information of the multimode terminal at the time of measurement through the non-broadcast network;

A blind spot location of the broadcast network is determined based on the measurement result and location information.

The broadcast network blind spot locating method according to claim 52, wherein before the obtaining the measurement result and the location information, the method further comprises: transmitting, by the non-broadcast network, a measurement indication of the measurement broadcast network signal to the multi-mode terminal.

The broadcast network blind spot locating method according to claim 53, wherein the multimode terminal sends a measurement broadcast network to the multimode terminal when performing location update, call setup, or handover in a non-broadcast network. Measurement indication of the signal.

The broadcast network blind spot locating method according to claim 53, wherein the measurement indication of the measurement broadcast network signal is sent to the multimode terminal by using a broadcast message or a short message.

The broadcast network blind spot locating method according to claim 53, wherein the indication comprises at least one of information that the multimode terminal needs to report and a manner of reporting.

The broadcast network blind spot locating method according to claim 56, wherein the information that the multimode terminal needs to report includes a broadcast network signal strength and location information at the time of measurement.

The broadcast network blind spot locating method according to claim 57, wherein the information that the multimode terminal needs to report further comprises the strength of the non-broadcast network signal at the location of the broadcast network signal measured by the multimode terminal.

The broadcast network blind spot locating method according to claim 56, wherein the reporting manner is a periodic reporting manner or an event trigger reporting manner.

The broadcast network blind spot locating method according to claim 59, wherein the event triggering reported event is that the strength of the broadcast network signal is measured to be lower than a specified signal strength threshold.

The broadcast network blind spot locating method according to claim 52 or 53, wherein the non-broadcast network is a cellular network, and at least one cell in the cellular network overlaps with a coverage of the broadcast network.

62. A network management system, characterized in that:

An information obtaining unit, configured to obtain, by using a non-broadcast network, a measurement result of the multimode terminal to the broadcast network signal and position information of the multimode terminal during the measurement; OP070869

WO 2008/104129 PCT/CN2008/070355

A blind spot position determining unit is configured to determine a blind spot position of the broadcast network based on the measurement result and the position information obtained by the information obtaining unit.

The network management system of claim 62, further comprising: an indication delivery unit, configured to send a measurement indication of the measurement broadcast network signal to the multimode terminal over the non-broadcast network.