WO2014067326A1

WO2014067326A1 - Method and base station for transmitting mtc indication signalling, and mtc scheduling method

Info

Publication number: WO2014067326A1
Application number: PCT/CN2013/082167
Authority: WO
Inventors: 石靖; 戴博; 李新彩; 夏树强; 方惠英
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-11-02
Filing date: 2013-08-23
Publication date: 2014-05-08
Also published as: CN103813467A; CN103813467B

Abstract

A method and base station for transmitting an MTC indication signalling, and an MTC scheduling method. The base station determines an MTC indication signalling according to the use condition of an MTC terminal resource; the base station transmits the MTC indication signalling to an adjacent base station; the base station receives an MTC indication signalling transmitted from the adjacent base station, and acquires MTC indication information therein representing the use condition of the MTC terminal resource; and the base station schedules an MTC according to the MTC indication information.

Description

Method for transmitting MTC indication signaling and base station, MTC scheduling method

The present invention relates to the field of wireless communications, and more particularly to an MTC (Machine Type) applicable in an LTE/LTE-A (Long Term Evolution/Long Term Evolution Advance) system and an evolved system thereof. Communication, machine type communication) transmission method of indication signaling, base station, and MTC scheduling method.

Background technique

MTC User Equipment (MTC UE), also known as Μ2Μ

(Machine to Machine, Machine to Machine, M2M for short) User communication equipment is the main application form of the Internet of Things at this stage. Low power consumption and low cost are important guarantees for large-scale applications. The M2M devices currently deployed on the market are mainly based on the GSM (Global System of Mobile communication) system. In recent years, due to the high spectrum efficiency of LTE/LTE-A, more and more mobile operators have chosen LTE/LTE-A as the future direction of broadband wireless communication systems. M2M multi-class data services based on LTE/LTE-A will also be more attractive. Only the cost of LTE-M2M equipment can be lower than that of MTC UE of GSM system, and M2M service can really be transferred from GSM to LTE system.

The current main alternatives for MTC UE cost reduction are reducing the terminal receive antenna, reducing the baseband processing bandwidth, reducing the peak rate supported by the terminal, using the half-duplex mode, and so on. However, the reduction in cost means a decrease in performance. The demand for cell coverage in the LTE/LTE-A system cannot be reduced. Therefore, the MTC UE configured with low cost needs to take some measures to meet the coverage performance requirements of the existing LTE terminal. . In addition, the MTC UE may be located in a basement, a corner, etc., and the scenario is worse than that of a normal LTE UE. To compensate for the drop in coverage caused by the penetration loss, some MTC UEs need higher performance improvement, so partial MTC is performed for this scenario. The uplink and downlink coverage enhancement of the UE is necessary.

The usual way to increase coverage is to increase the data transmission power, but as the transmit power increases, the corresponding interference increases.

Summary of the invention The embodiments of the present invention mainly consider designing MTC service indication signaling (MTC subframe indication signaling and/or MTC frequency domain indication signaling), and inter-base station interaction, thereby solving interference caused by MTC coverage enhancement requirements through coordinated scheduling between base stations. The problem further satisfies the coverage enhancement requirement of some MTC UEs, and solves the interference problem caused by the increase of the transmission power.

Embodiments of the present invention provide a method applicable to an LTE/LTE-A system and an evolved system thereof.

The method for transmitting the MTC indication signaling and the base station are used to solve the interference problem caused by the MTC service transmission power in the LTE/LTE-A system, and the coverage of the MTC UE due to the interference and the reception of the MTC UE data by other base stations. problem. A machine type communication method for transmitting MTC indication signaling, including:

The base station determines the MTC indication signaling according to the usage of the MTC terminal resource;

The base station transmits MTC indication signaling to the neighboring base station.

Preferably, the MTC indication signaling includes any one or any combination of the following information: MTC service type information, transmission data type information, interference information, MTC transmission mode information, MTC transmission power information, MTC time domain location information, MTC frequency domain Location information and MTC related system configuration information.

Preferably, the interference information indicates the interference size generated by the MTC transmission under the base station and/or the interference size received by the MTC transmission under the base station, wherein the MTC transmission includes uplink data transmission and/or downlink data transmission.

Preferably, the MTC time domain location information includes information of an MTC transmission period expressed in a number of radio frames or subframes and/or information of a subframe used for MTC transmission in a period;

The MTC frequency domain location information is expressed in units of physical resource blocks or in units of subbands.

Preferably, the MTC indication signaling includes at least one of MTC service type information, transmission data type information, MTC transmission mode information, and MTC related system configuration information, and the MTC related system configuration information includes physical random access channel (PRACH) configuration information. .

Preferably, the method is used in a Long Term Evolution/Advanced Long Term Evolution (LTE/LTE-A) system and an evolved system thereof, and the base station transmits MTC indication signaling to a neighboring base station through an X2 interface. A base station includes a transmitting device, and the sending device includes: An indication signaling determining module, configured to: determine MTC indication signaling according to a device type communication MTC terminal resource usage situation;

And a sending module, configured to: send the MTC indication signaling to the neighboring base station.

Preferably, the MTC indication signaling determined by the indication signaling determining module includes any one or any combination of the following information: MTC service type information, transmission data type information, interference information, MTC transmission mode information, MTC transmission power information, and MTC time. Domain location information, MTC frequency domain location information, and MTC related system configuration information.

Preferably, the base station is a base station of a Long Term Evolution/Advanced Long Term Evolution (LTE/LTE-A) system and its evolved system. A scheduling method for machine type communication MTC, including:

Receiving, by the base station, the MTC indication signaling sent by the neighboring base station, and acquiring the MTC indication information indicating the usage of the MTC terminal resource;

The base station schedules the MTC according to the MTC indication information.

Preferably, the scheduling includes one or more of the following scheduling modes: MTC transmission, fast handover, joint reception, joint transmission, and interference avoidance at high power.

Preferably, the MTC indication signaling includes time domain location information and interference size information. The base station scheduling the MTC according to the MTC indication information, where: the base station, when the interference indicated by the interference size information is greater than or equal to a set high interference threshold, Perform MTC transmission at high power in the time domain location, or joint transmission and joint reception with neighboring base stations in the time domain location.

Preferably, the MTC indication information includes the PRACH configuration information and the MTC time domain location information. The base station scheduling the MTC according to the MTC indication information includes: the base station scheduling terminal performs fast handover according to the PRACH configuration information in the time domain location.

Preferably, the MTC indication information includes MTC time domain location information, MTC frequency domain location information, MTC service level information, and MTC transmission mode information. The base station schedules the MTC according to the MTC indication information, where: the base station determines that the MTC service level is level 1 and When the MTC transmission mode is closed-loop centralized transmission, the MTC terminal is jointly transmitted or jointly received with the neighboring base station in the MTC time domain location information and the resource location indicated by the MTC frequency domain location information. Preferably, the MTC indication information includes MTC time domain location information, MTC frequency domain location information, and MTC service level information. The base station scheduling the MTC according to the MTC indication information, including: determining the MTC time domain location when the MTC service level is level 1. The resource location indicated by the information and the MTC frequency domain location information is configured as an Almost Blank Subframe (ABS).

In the embodiment of the present invention, the MTC indication signaling is performed between the base stations, and the base stations coordinate scheduling to solve the interference problem caused by the MTC coverage enhancement requirement, thereby satisfying the coverage enhancement requirement of the partial MTC UE, and solving the interference problem caused by the increase of the transmission power; In addition, the MTC indication signaling can also reduce the interference received by the MTC UE itself, thereby improving the transmission performance of the MTC UE, achieving the purpose of improving the coverage of the MTC UE, and facilitating the reception of the MTC UE data by other base stations through the MTC indication signaling. BRIEF abstract

1 is a schematic diagram of signaling interaction between base stations according to an embodiment of the present invention;

2 is a flow chart of a method for transmitting and scheduling MTC indication signaling according to an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention. Preferred embodiment of the invention

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the embodiment of the present invention provides a method and a base station for transmitting MTC indication signaling applicable in an LTE/LTE-A system and an evolved system thereof.

Example 1

The base station 1 schedules the MTC UE to start at the next radio frame for N subframe transmissions, N=4. At this time, the terminal is located in the basement, and the penetration loss is consumed. The MTC UE at the time domain resource location is configured to transmit at high power.

At this time, the base station 1 implements the X2 interface (the X2 interface according to the subframe information occupied by the MTC UE). The interconnection between the eNBs is an interface for data transmission between the base station and the base station. The signaling is sent to the neighboring base station 2, and the indication signaling content includes MTC time domain location information and interference size information.

The time domain location information may be 2 bit information 10 indicating N=4 in the set {1, 2, 4, 8}, and the interference size may be lbit information 1 indicating that the interference is large. The time domain location information and the interference size information are combined to form an indication signaling content.

After the base station 2 receives the MTC indication signaling from the base station 1 via the X2 interface, since the base station also schedules the MTC UE at the same resource location, the scheduling MTC UE starts at the next radio frame and continues N subframe transmissions, N=4. And the MTC UE is configured to transmit at high power.

The reason why the two are configured for high power is that the location of the terminal is harsh, and the high power is offset by the penetration loss, so the interference can be coordinated.

It is assumed here that the MTC terminals scheduled by the two base stations are in an environment where the base station or the corner is inferior, that is, the MTC terminal is fixed in position and the base station is known. Neighboring base stations are subject to high power configuration so that information may be received. The high power of the signal is attenuated by the large losses.

Example 2:

The base station 2 acquires the MTC indication signaling sent by the neighboring base station 1 through the X2 interface, where the MTC indication signaling carries at least one of the following information: MTC service type information, transmission data type information, interference information, and MTC transmission mode. Information, MTC transmit power information, MTC time domain location information, MTC frequency domain location information, MTC related system configuration information.

1) MTC service type 3bit information (8 levels): Indicates level 1 (health health service) to level 5 (smart meter reading service), reserved for 3 levels.

2) Transmission data type 2bit information (4 types of data): Indicates control information, measurement pilot information, first transmission data information, and retransmission data information.

3) Interference size lbit information: Indicates the interference size of the MTC UE. 1 indicates that the interference is large, and 0 indicates that the interference is small.

4) MTC transmission mode 2bit information: Indicates open-loop distributed transmission, closed-loop distributed transmission, closed-loop centralized transmission, and reserved one.

5) MTC transmit power 6bit information: Indicates each resource block (RB) Whether the MTC UE is a low power node, 1 indicates a low power node, and 0 indicates that it is not a low power node.

6) MTC time domain location 12bit information: The first 2 bits indicate the scheduled radio frame N value, and the last 1 Obit indicates which subframes in each radio frame are scheduled for MTC transmission.

7) MTC frequency domain location 6bit information: 6bit corresponds to the indication of 6RB in the 1.4MHz bandwidth, 1 means occupied, 0 means unoccupied.

8) MTC related system configuration 6bit information: Notifies the PRACH configuration information, which is convenient for switching. The base station 1 will schedule the MTC uplink service, N=8, on the first two RBs of the center 6 RB of the {4, 5, 6} subframes on the N radio frames scheduled to start at the next radio frame. The service level is 1 , so the neighboring base station needs to perform interference avoidance at the same frequency domain location at the moment, so as to ensure that the MTC service of level 1 is not interfered by the neighboring base station.

The base station 1 transmits the MTC subframe indication signaling content in the current frame, including MTC time domain location information, MTC frequency domain location information, and MTC service level information. The time domain location information may be 2 bit information 01 indicating N=8 in the set {4, 8, 16, 32}, and the lObit information 0001110000 indicates that the subframe in which the MTC service is transmitted is the {4, 5, 6} subframes; The frequency domain location information may be 6 bit information 110000 indicating the first two RBs in the 1.4 MHz bandwidth; the service level information may be 3 bit information 001 indicating the most important service level 1. The MTC time domain location information, the MTC frequency domain location information, and the service level information together constitute an indication signaling content.

The base station 2 receives the MTC subframe indication signaling from the base station 1 through the X2 interface, and parses out the first two RBs of the center 6 RB of the {4, 5, 6} subframes among the N radio frames starting from the next radio frame. The MTC uplink service is scheduled, and the MTC service of level 1 is confirmed, so interference avoidance is required. The MTC UEs in the same frequency domain position are scheduled to perform interference avoidance at this time, and the location is configured as ABS.

Example 3

MTC indication signaling is used for fast handover. The base station 2 can reduce or eliminate the MTC UE interference to the base station 1 by the MTC UE on the same resource by scheduling.

The base station 2 acquires the MTC indication signaling sent by the neighboring base station 1 through the X2 interface, where The MTC indication signaling carries at least one of the following information: MTC service type information, transmission data type information, interference information, MTC transmission mode information, MTC transmission power information, MTC time domain location information, MTC frequency domain location information, MTC Related system configuration information.

The base station 1 sends the system configuration information of the base station to the neighboring base station 2 through the MTC indication signaling, and the base station 2 schedules its MTC UE to perform handover according to the system configuration information of the base station 1. The indication signaling includes system configuration information and MTC time domain location information. The 6-bit information indicates PRACH configuration information, and the time domain location information may be 2 bits of information 00 indicating N=4 in the set {4, 8, 16, 32}, so that the terminal in the base station 2 can perform in the next N radio frames. Quickly switch.

Example 4

The base station 1 will schedule the MTC uplink service, N=16, on the middle two RBs of the center 6 RBs of the {2, 3, 6, 7} subframes on the N radio frames scheduled to start at the next radio frame. The service level is 1 and the MTC transmission mode is closed-loop centralized transmission. The neighboring base station needs to perform joint transmission or joint reception at the same frequency domain location at the moment to ensure that the MTC service of level 1 is correctly received by the base station side.

The base station 1 transmits the MTC subframe indication signaling content in the Nth frame, including the MTC time domain location information,

MTC frequency domain location information, MTC service level information, and MTC transmission mode information. The time domain location information may be 2 bit information 10 indicating N=16 in the set {4, 8, 16, 32}, 1 Obit information 0110011000 indicates that the subframes for transmitting the MTC service are the {2, 3, 6, and 7} sub-frames. The MTC frequency domain location information may be 6 bit information 001100 indicating two RBs in the middle of the 1.4 MHz bandwidth; the service level information may be 3 bit information 001 indicating the most important service level 1; the MTC transmission mode information may be 2 bit information 10 indicating closed loop centralized transmission. The MTC time domain location information, the MTC frequency domain location information, the service level information, and the transmission mode information together constitute an indication signaling content.

The base station 2 receives the MTC subframe indication signaling from the base station 1 through the X2 interface, and parses out The MTC uplink service is scheduled on the middle two RBs of the center 6 RBs of the {2, 3, 6, 7} subframes of the N radio frames starting from the next radio frame, and it is confirmed that the level is 1 and the transmission mode is closed-loop centralized. The MTC service is transmitted, so joint transmission or joint reception is required. Therefore, the base station 2 performs joint transmission or joint reception with the base station 1 at the same resource location at the same time.

Example 5

The above four embodiments can be combined, that is, the scheduling effects for different indication signaling can be combined. E.g:

At this time, the base station 1 sends the indication signaling to the neighboring base station 2 through the X2 interface according to the subframe information occupied by the MTC UE, and the indication signaling content includes the MTC time domain location information and the interference size information.

The base station 2 receives the MTC subframe indication signaling from the base station 1 through the X2 interface, and parses out the MTC service in the N radio frames starting from the next radio frame, and is the interference larger node. Therefore, the base station 2 and the base station 1 are to perform joint transmission or joint reception. The base station 2 performs joint transmission or joint reception with the base station 1 at the same resource location at the same time.

Embodiment 5 is only an example of a combination, and different indication signaling may be used with the same scheduling means and the like.

As shown in FIG. 3, the base station in the above embodiment includes a transmitting device 30, where the transmitting device 30 includes:

The indication signaling determining module 301 is configured to: determine the MTC indication signaling according to the machine type communication (MTC) terminal resource usage;

The sending module 302 is configured to: send the MTC indication signaling to a neighboring base station. One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct the associated hardware, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

It is apparent that the above-described embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Those skilled in the art can devise various modifications and changes to the present invention without departing from the spirit and scope of the present invention. range. Therefore, it is intended that the present invention cover the modifications and modifications of the present invention, and the modifications and variations of the invention are intended to be included within the scope of the invention.

Industrial applicability

In the embodiment of the present invention, the MTC indication signaling is exchanged between the base stations, and the coordinated scheduling between the base stations is solved.

The MTC covers the interference problem caused by the enhanced demand, and further satisfies the coverage enhancement requirements of some MTC UEs, and solves the interference problem caused by the increase of the transmission power. In addition, the MTC indication signaling can also reduce the interference received by the MTC UE itself, thereby improving the MTC. The transmission performance of the UE achieves the purpose of improving the coverage of the MTC UE, and the reception of the MTC UE data by other base stations is also facilitated by the MTC indication signaling.

Claims

claims

1. A method for sending machine type communication (MTC) indication signaling, including:

The base station determines the MTC indication signaling according to the MTC terminal resource usage; and the base station sends the MTC indication signaling to the adjacent base station.

2. The method according to claim 1, wherein:

The MTC indication signaling includes any one or any combination of the following information: MTC service type information, transmission data type information, interference information, MTC transmission mode information, MTC transmit power information, MTC time domain location information, MTC frequency domain location information and MTC related system configuration information.

3. The method according to claim 2, wherein:

The interference information indicates the amount of interference generated by MTC transmission under the base station and/or the amount of interference suffered by MTC transmission under the base station, where the MTC transmission includes uplink data transmission and

/or downlink data transmission.

4. The method according to claim 2, wherein:

The MTC time domain location information includes information on the MTC transmission cycle represented by the number of radio frames or subframes and/or information on the subframes used for MTC transmission within the cycle;

5. The method according to claim 2, wherein:

The MTC indication signaling includes at least one of MTC service type information, transmission data type information, MTC transmission mode information and MTC related system configuration information. The MTC related system configuration information includes physical random access channel (PRACH) configuration. information.

6. The method according to any one of claims 1 to 5, wherein:

The method is used in a long-term evolution/long-term evolution-advanced (LTE/LTE-A) system and its evolution system, and the base station sends the MTC indication signaling to adjacent base stations through an X2 interface.

7. A base station including a sending device, wherein the sending device includes: an indication signaling determination module, which is configured to: determine the MTC indication signaling according to machine type communication (MTC) terminal resource usage; and

A sending module, which is configured to: send the MTC indication signaling to adjacent base stations.

8. The base station according to claim 7, wherein:

The MTC indication signaling determined by the indication signaling determination module includes any one or any combination of the following information: MTC service type information, transmission data type information, interference information, MTC transmission mode information, MTC transmit power information, MTC time domain Location information, MTC frequency domain location information and MTC related system configuration information.

9. The base station according to claim 7 or 8, wherein:

The base station is a base station of a long-term evolution/long-term evolution-advanced (LTE/LTE-A) system and its evolution system.

10. A scheduling method for machine type communication (MTC), including:

The base station receives the MTC indication signaling sent by the adjacent base station, and obtains the MTC indication information indicating the usage of MTC terminal resources; and

The base station schedules the MTC according to the MTC indication information.

11. The scheduling method according to claim 10, wherein:

The scheduling includes any one or any combination of the following scheduling methods: MTC transmission with high power, fast switching, joint reception, joint transmission and interference avoidance.

12. The scheduling method according to claim 10, wherein:

The MTC indication signaling includes time domain location information and interference size information;

The base station schedules MTC according to the MTC indication information, including: when the interference represented by the interference size information is greater than or equal to a set high interference threshold, the base station performs MTC at the time domain position with high power. transmission, or joint transmission and joint reception with the neighboring base station at the time domain location.

13. The scheduling method according to claim 10, wherein:

The MTC indication information includes physical random access channel (PRACH) configuration information and MTC time domain location information;

The base station schedules the MTC according to the MTC indication information, including: the base station schedules the terminal to perform fast switching at the time domain position according to the PRACH configuration information.

14. The scheduling method according to claim 10, wherein:

The MTC indication information includes MTC time domain location information, MTC frequency domain location information, MTC service level information and MTC transmission mode information;

The base station schedules the MTC according to the MTC indication information, including: when the base station determines that the MTC service level is level 1 and the MTC transmission mode is closed-loop centralized transmission, the MTC time domain location information and the MTC frequency domain location are The MTC terminal performs joint transmission or joint reception with the adjacent base station at the resource location indicated by the information.

15. The scheduling method according to claim 10, wherein:

The MTC indication information includes MTC time domain location information, MTC frequency domain location information and MTC service level information;

The base station schedules the MTC according to the MTC indication information, including: when the MTC service level is determined to be level 1, configuring the resource location indicated by the MTC time domain location information and the MTC frequency domain location information as an almost blank sub-station. Frame(ABS).