WO2017118415A1

WO2017118415A1 - Method and device for indicating power headroom report

Info

Publication number: WO2017118415A1
Application number: PCT/CN2017/070451
Authority: WO
Inventors: 杨育波; 罗超; 刘铮
Original assignee: 华为技术有限公司
Priority date: 2016-01-09
Filing date: 2017-01-06
Publication date: 2017-07-13

Abstract

A method and device for indicating a power headroom report (PHR), the method comprising: a user equipment (UE) first determining a power headroom report, then sending same to a base station during a random access process; the PHR can be borne by a related information segment of a Message 3 sent by the UE to the base station. The present solution can enable a base station to acquire in a timely manner a basis for performing scheduling configuration for a current UE uplink data transmission, so that power control and scheduling information is more accurately configured for the UE, thus avoiding uplink bandwidth waste caused by allocation to a UE of a channel exceeding the uplink transmission capability of same.

Description

Method and device for indicating power headroom report

Technical field

The present invention relates to the field of mobile communications technologies, and in particular, to a method and apparatus for indicating a power headroom report.

Background technique

The Internet of Things (IoT) is the Internet of Things. It extends the client side of the Internet to any item so that information can be exchanged and communicated between any item and item. Such a communication method is also called Machine Type Communications (MTC), and a node for communication is called an MTC terminal. Typical Internet of Things applications include smart meter reading, smart home, and more. Because the Internet of Things needs to be applied in a variety of scenarios, from outdoor to indoor, from above ground to underground, there are many special requirements for the design of the Internet of Things: for example, coverage enhancement, support for a large number of low-rate devices, low cost and low energy consumption. Wait. In order to meet these special needs, a new research topic was adopted at the 62nd meeting of the 3GPP GERAN to study ways to support extremely low complexity and low cost IoT in cellular networks. The narrowband Internet of Things (NB-IoT) solution was adopted at the 69th meeting of the 3GPP RAN for its low cost and outstanding coverage enhancement capabilities, and standardization work was completed in the R13 version.

In an existing Long Term Evolution (LTE) communication system, a terminal device (UE) communicates frequently with a base station (eNodeB), and the terminal The device periodically reports the power headroom report to the base station, and the base station performs power control and scheduling according to the power headroom report reported by the terminal device as an important basis. However, in the NB-IoT system, because the terminal equipment service is small, if the transmission mechanism for the power headroom report in the existing LTE is reused, the base station cannot obtain the power headroom report of the uplink data transmission performed by the terminal equipment at the time (power) Headroom report, RHR), it is impossible to schedule and power control the uplink data transmission of the terminal equipment.

Summary of the invention

The embodiment of the invention discloses a method and a device for indicating a power headroom report, which can solve the problem that the base station in the NB-IoT system cannot know the power headroom report of the terminal device in time, thereby causing inaccurate configuration of scheduling information or power to the terminal device. Control information.

In one aspect, an embodiment of the present application provides a method for indicating a power headroom report (PHR), which is mainly used in a narrowband Internet of Things (NB-IoT) system, the method comprising: determining, by a terminal device (UE), a power headroom It is reported that the UE then sends the power headroom report (PHR) to the base station in the random access procedure, wherein the power headroom report can be carried by the relevant information segment on the message (first message) sent by the UE to the base station.

In a possible design, the UE carries a PHR in a third message (message 3) through a random access procedure, and the message 3 is used by the UE to establish a Radio Resource Control (RRC) connection with the base station.

In one possible design, the power headroom report is the difference between the uplink power estimated by the UE and the maximum power of the UE.

In a possible design, the power headroom report may also be a set of the maximum number of subcarriers or a number of subcarriers supported by the UE or any one of the set of subcarrier numbers. By indicating a set of subcarrier numbers, the need may be reduced. The number of information bits sent. example If the set of supported subcarriers is {1, 3, 6, 12}, only two bits are needed to indicate the number of subcarriers that the terminal can support.

In a possible design, the information segment is used to determine a status or indication, and is used to instruct the UE to send the power headroom report to the base station, and the UE sends a second message to the base station according to the status or indication, and second. The message includes a power headroom report.

In a possible design, the UE sends a random access preamble sequence to the base station before the third message of the random access procedure sends the first message to the base station.

In one possible design, the first message is a random access preamble sequence.

In a possible design, the information segment may also be used to determine another state or indication (second state), instructing the UE to send a power headroom report to the base station; and the UE sends a third to the base station according to the indication of the second state. a message, the third message including the power headroom report.

On the other hand, an embodiment of the present application provides a method for receiving a power headroom report (PHR), which is mainly used in a narrowband Internet of Things (NB-IoT) system, including: a base station receiving a message sent by a UE; the message carrying The power headroom report information may be carried on a third message of the random access procedure sent by the UE to the base station. After receiving the message sent by the UE, the base station parses the message and obtains a power headroom report; Based on the power headroom report, the scheduling information or power control information of the UE is determined.

In another aspect, an embodiment of the present invention provides a UE, where the UE has a function of implementing UE behavior in the foregoing method design. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above. The modules can be software and/or hardware.

In one possible design, the receiver and processor are included in the structure of the UE. The processor is configured to determine a power headroom report, and the transmitter is configured to send a message to the base station in a third message of the random access process, where the message carries a power headroom report, where the function The rate margin report may be carried by the relevant information segment on the message (eg, message 3) sent by the UE to the base station.

On the other hand, an embodiment of the present invention provides a base station, which has a function of realizing the behavior of a base station in the actual method. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the structure of the base station includes a processor and a transmitter. The receiver is configured to receive a message sent by the terminal device; the message carries power headroom report information, and may be carried on a message 3 message sent by the UE to the base station; the processor parses the message and obtains a power headroom report; Based on the parsed power headroom report, the scheduling information or power control information of the UE is determined.

In another aspect, an embodiment of the present invention provides a communication system, where the system includes the base station and the UE in the foregoing aspect; or the system may further include other network entities.

In still another aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the UE, including a program designed to perform the above aspects.

Compared with the prior art, the solution provided by the present invention can enable the base station to perform the scheduling configuration acquisition basis for the uplink data transmission in the UE in time, so as to more accurately configure the power control and scheduling information for the UE, and avoid exceeding the uplink of the UE. The transmission capability channel is allocated to the UE to cause waste of uplink bandwidth.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, only some embodiments of the present invention are reflected in the following figures, for the skill Other embodiments of the invention may be derived from these drawings without departing from the scope of the invention. All such embodiments or implementations are within the scope of the invention.

1 is a flow chart of a method for indicating a power headroom report according to the present invention;

2 is a schematic structural diagram of a base station implementing the present invention;

FIG. 3 is a schematic structural diagram of a UE implementing the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.

The network architecture and the service scenario described in the embodiments of the present invention are used to more clearly illustrate the technical solutions of the embodiments of the present invention, and do not constitute a limitation of the technical solutions provided by the embodiments of the present invention. The technical solutions provided by the embodiments of the present invention are equally applicable to similar technical problems.

In the present application, the terms "network" and "system" are often used interchangeably, but those skilled in the art can understand the meaning. The user equipment UE to which the present application relates may include various handheld devices having wireless communication functions, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, and various forms of user equipment (UE). Mobile station (MS), terminal, user equipment, etc. For convenience of description, in the present application, the devices mentioned above are collectively referred to as user equipments or UEs. Base station (base station, BS) is a device deployed in a radio access network to provide wireless communication functions for a UE. The base station may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In a system using different radio access technologies, the name of a device having a base station function may be different. For example, in an LTE network, an evolved Node B (evolved Node B: eNB or eNodeB) is in the third. In the 3G network, it is called Node B and so on. For convenience of description, in the present application, the above-mentioned devices that provide wireless communication functions for the UE are collectively referred to as a base station or a BS.

In LTE, a terminal equipment (UE) sends a power headroom report (PHR) to a base station, so that the base station performs scheduling and power control on the UE based on the PHR. The UE may periodically report the PHR to the base station, or may report the condition when the certain condition is met. For example, when the path loss changes exceed the set threshold, the base station reports the PHR. The base station can also configure a minimum reporting period of the PHR to reduce signaling overhead, and the PHR is generally sent with the UE uplink number. The PHR reported by the UE is an important basis for the base station to perform uplink scheduling. The base station can avoid allocating a channel that exceeds the uplink transmission capability of the UE to the UE, thereby causing waste of uplink bandwidth.

In the NB-IoT system, since the UE has a small amount of traffic, each time the UE wakes up, generally only one uplink data transmission is performed, and the next uplink data transmission needs to be separated for a long time, for example, for a smart meter terminal device, generally The uplink data can be sent once a month or longer. If the PHR trigger condition and the sending method in the LTE are reused, that is, the NB-IoT terminal sends the PHR in the current data, the base station performs power control and scheduling for the current UE. If the PHR is not obtained in advance, power control and scheduling of the uplink transmission of the UE cannot be performed. The PHR obtained when the UE sends data to the base station when waking up next time, because of the long time interval, can not play the role of PHR for power control and scheduling of the base station, and the base station also lacks corresponding auxiliary information for uplink. Data scheduling.

Therefore, a method for indicating a PHR in the embodiment of the present invention, as shown in FIG. 1 , can be applied to an NB-IoT system, which can solve the problem that a base station in LTE cannot implement acquisition of a PHR but cannot perform power control and scheduling on a UE. The problem. The solution provided by the embodiment of the present invention is specifically described below with reference to FIG. The executor of the method of the embodiment of the present invention relates to a base station and a UE, and the individual base station side or the individual UE side may constitute an independent technical solution.

S101: The UE sends a random access preamble sequence to the base station.

The UE random access procedure can be generally divided into a contention-based random access procedure and a contention-free random access procedure.

In the contention-based random access procedure, the UE randomly selects a preamble sequence and transmits it on the RACH channel. The non-contention random access procedure refers to that the UE uses the specific preamble sequence and the PRACH resource provided by the eNodeB when accessing, so that the UE does not collide with other UEs to ensure the success rate of the access.

S102: After receiving the random access preamble sequence sent by the UE, the base station sends a random access response to the UE in the downlink. The random access response generally contains the following information:

- the number of the preamble sequence;

- timing adjustment information;

- Uplink resource location indication information assigned to the UE.

In the contention-based random access procedure, the random access response may further include a temporarily allocated cell radio network temporary identifier (C-RNTI) information.

S103: After receiving the random access response, the UE sends an uplink message according to the uplink resource allocated by the base station to the UE. The uplink message carries a power headroom report (PHR). The UE uplinks the message 3 to initiate a radio resource control (RRC) connection establishment request between the base station and the base station.

The UE may carry the PHR in the message3, and send the PHR to the base station through the message 3, so that the base station can perform uplink data scheduling control and power control on the UE according to the PHR. Before sending the PHR, the UE first determines the content of the PHR carried in the message 3. The content of the general PHR is expressed as follows:

The UE estimates the uplink power, determines the estimated uplink power, determines the difference between the estimated uplink power and the maximum power of the UE, and uses the determined difference as the content of the PHR, and the UE obtains the difference and reports the difference. For the base station, for example, there may be 64 indications ranging from -23 dB to +40 dB, which may be scaled down to reduce the message 3 message size.

2. The UE determines the number of subcarriers that can be supported under the current uplink transmission power, and uses the value of the determined maximum number of subcarriers as the content of the PHR. The UE obtains the value of the maximum number of subcarriers and reports the value to the base station.

Optionally, one of the set of subcarrier numbers can be indicated, thereby reducing the number of information bits that need to be sent. For example, when there are 12 subcarriers, it needs to be indicated by at least 4 bits. If it is represented by a set of subcarriers, such as {1, 4, 8, 12}, only 2 bit indications are needed.

In addition to carrying the PHR content as described above in message 3, another alternative is:

The idle information indicator bit or the new information indicator bit is used in the message 2 to determine that the UE sends the PHR or other auxiliary scheduling information to the base station under certain conditions. The information indicator bit can also determine on which uplink resource the UE transmits the above information. The specific PHR content sent is as described above and will not be described here.

The UE may also carry the PHR in the uplink channel, and send the PHR to the base station through the uplink channel, so that the base station can perform uplink data scheduling control and power control on the UE according to the PHR.

S104: The base station receives the uplink message of the UE, sends the message 4 to the UE, and returns a conflict. Solve the information.

In this embodiment, the PHR is carried in the message 3 sent by the UE to the base station, so that the base station can perform the scheduling configuration acquisition basis for the uplink data transmission in the UE in time, thereby configuring the power control and scheduling information for the UE more accurately. The channel that exceeds the uplink transmission capability of the UE is allocated to the UE, thereby causing waste of uplink bandwidth, or allocating less bandwidth required for the uplink transmission capability that the UE needs to be required, thereby causing loss of uplink transmission information of the UE.

Another method for indicating a PHR provided by an embodiment of the present invention. The solution provided by the embodiment of the present invention is specifically described below with reference to FIG. The method in the embodiment of the present invention relates to a base station and a user equipment, and a single base station or a single UE may constitute an independent technical solution.

The method for indicating the PHR provided by this embodiment differs from the foregoing embodiment in that:

The information carrying the indication PHR is configured in the random access preamble sequence sent by the UE in the S101 to the base station, instead of configuring the information carrying the indication PHR in the message 3 in the foregoing embodiment.

Specifically, one or more information indicator bits are determined in the random preamble sequence, and are used to determine that the UE sends the PHR or other auxiliary scheduling information to the base station under certain conditions. The information indicator bit can also determine on which uplink resource the UE transmits the above information. It can be implemented by using one bit indication, such as, for example, the preamble sequence set {c_1, c_2, ..., c_n}. If the UE selects the sequence c_1~c_n/2 as the preamble sequence, the base station considers that the UE sends 0 after receiving; otherwise, 1.

In this embodiment, the PHR indication information is carried in the random access preamble sequence sent by the UE to the base station, and the UE is instructed to send the PHR in the uplink under certain conditions, so that the base station can perform scheduling for the uplink data transmission for the UE in time. Configure the acquisition basis to more accurately configure the power control and scheduling information for the UE to avoid uplink transmission beyond the UE. The capability channel is allocated to the UE to cause waste of uplink bandwidth, or the UE is allocated less bandwidth than the uplink transmission capability that it should be required, thereby causing loss of uplink transmission information of the UE.

FIG. 2 shows a possible structural diagram of a base station involved in the above embodiment.

The base station includes a transmitter/receiver 1001, a controller/processor 1002, a memory 1003, and a communication unit 1004. The transmitter/receiver 1001 is configured to support the base station to transmit and receive information with the UE in the foregoing embodiment, and to support radio communication between the UE and other UEs. The controller/processor 1002 performs various functions for communicating with the UE. On the uplink, the uplink signal from the UE is received via the antenna, coordinated by the receiver 1001, and further processed by the controller/processor 1102 to recover the service data and signaling information transmitted by the UE. On the downlink, traffic data and signaling messages are processed by controller/processor 1002 and mediated by transmitter 1001 to generate downlink signals for transmission to the UE via the antenna. The controller/processor 1002 also performs the processes involved in the base station of FIG. 1 and/or other processes for the techniques described herein. The memory 1003 is used to store program codes and data of the base station. The communication unit 1004 is configured to support the base station to communicate with other network entities.

It will be appreciated that Figure 3 only shows a simplified design of the base station. In practical applications, the base station may include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all base stations that can implement the present invention are within the scope of the present invention.

FIG. 3 shows a simplified schematic diagram of one possible design structure of a UE involved in the above embodiment. The UE includes a transmitter 1101, a receiver 1102, a controller/processor 1103, a memory 1104, and a modem processor 1105.

Transmitter 1101 conditions (e.g., analog transforms, filters, amplifies, and upconverts, etc.) the output samples and generates an uplink signal that is transmitted via an antenna to the base station described in the above embodiments. On the downlink, the antenna receives the downlink signal transmitted by the base station in the above embodiment. Receiver 1102 conditions (eg, filters, amplifies, downconverts, digitizes, etc.) the signals received from the antenna and provides input samples. In modem processor 1105, encoder 1106 receives the traffic data and signaling messages to be transmitted on the uplink and processes (e.g., formats, codes, and interleaves) the traffic data and signaling messages. Modulator 1107 further processes (e.g., symbol maps and modulates) the encoded traffic data and signaling messages and provides output samples. Demodulator 1109 processes (e.g., demodulates) the input samples and provides symbol estimates. The decoder 1108 processes (e.g., deinterleaves and decodes) the symbol estimate and provides decoded data and signaling messages that are sent to the UE. Encoder 1106, modulator 1107, demodulator 1109, and decoder 1108 may be implemented by a composite modem processor 1105. These units are processed according to the radio access technology employed by the radio access network (e.g., access technologies of LTE and other evolved systems).

The controller/processor 1103 performs control management on the actions of the UE for performing the processing performed by the UE in the above embodiment. For example, other procedures for controlling the UE to receive paging according to the received DRX long period and/or the techniques described herein. As an example, the controller/processor 1103 is configured to support the UE in performing the processing of the UE in FIG. 1 and/or other processes for the techniques described herein, the memory 1104 for storing program code for the UE 110 and data.

It should be noted that, in the above embodiments, the descriptions of the various embodiments are different, and the parts that are not described in detail in a certain embodiment may be referred to the related descriptions of other embodiments. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

The steps in the method of the embodiment of the present invention may be sequentially adjusted, merged, and deleted according to actual needs.

The modules in the apparatus of the embodiment of the present invention may be combined, divided, and deleted according to actual needs.

The controller/processor for performing the above-mentioned base station, UE or core network device function of the present invention may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), and an on-site Program gate array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.

The steps of a method or algorithm described in connection with the present disclosure may be implemented in a hardware, or may be implemented by a processor executing software instructions. The software instructions may be comprised of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable hard disk, CD-ROM, or any other form of storage well known in the art. In the medium. An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in the user equipment. Of course, the processor and the storage medium may also reside as discrete components in the user equipment.

Those skilled in the art will appreciate that in one or more examples described above, the functions described herein can be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium. Computer readable The medium includes computer storage media and communication media including any medium that facilitates transfer of the computer program from one location to another. A storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

The specific embodiments of the present invention have been described in detail with reference to the preferred embodiments of the present invention. The scope of the protection, any modifications, equivalent substitutions, improvements, etc., which are made on the basis of the technical solutions of the present invention, are included in the scope of the present invention.

Claims

A terminal equipment (UE) for indicating a power headroom report (PHR), characterized by comprising a processor and a transmitter;

The processor is configured to determine a power headroom report;

The transmitter is configured to send a first message to a base station in a random access process, where the first message includes an information segment, where the information segment is used to indicate the power headroom report, where the information segment includes a Or multiple information bits.
The terminal device according to claim 1, wherein:

The first message is a third message (message 3) of the random access procedure, and the message 3 is used by the UE to establish a radio resource control (RRC) connection with the base station.
A terminal equipment (UE) for indicating a power headroom report (PHR), characterized by comprising a processor and a transmitter;

The processor is configured to determine a power headroom report;

The transmitter is configured to send a first message to the base station on an uplink channel, where the first message includes an information segment, where the information segment is used to indicate the power headroom report, where the information segment includes one or more Information bit.
A terminal device according to any one of claims 1 to 3, characterized in that

The power headroom report includes a difference between an estimated uplink power of the processor and a maximum power of the UE determined by the processor.
A terminal device according to any one of claims 1 to 3, characterized in that

The power headroom report includes a set of the maximum number of subcarriers or a number of subcarriers supported by the UE, or any one of the sets of the number of subcarriers.
A terminal device according to any one of claims 1 to 5, characterized in that

The information segment is used to indicate the power headroom report, and specifically includes:

The information segment is used to determine a first state, where the first state is used to instruct the UE to send the power headroom report to the base station;

The UE sends a second message to the base station according to the indication of the first state, where the second message includes the power headroom report.
The terminal device according to any one of claims 1, 2, 4, 5 or 6, wherein

The transmitter is further configured to send a random access preamble sequence to the base station before sending the first message to the base station in the random access process.
The terminal device according to claim 1, wherein

The first message is a random access preamble sequence.
The terminal device according to claim 8, wherein the information segment is used to determine a second state, and the second state is used to instruct the UE to send the power headroom report to the base station;

The processor sends a third message to the base station according to the indication of the second state, where the third message includes the power headroom report.
A base station for receiving a power headroom report (PHR), comprising: a receiver and a processor;

The receiver is configured to receive a first message sent by the terminal device;

The processor is configured to parse the first message to obtain a power headroom report;

The processor is further configured to determine scheduling information or power control information of the terminal device according to the power headroom report.
A method for indicating a Power Headroom Report (PHR) for a narrowband Internet of Things (NB-IoT) system, comprising:

The terminal device UE determines a power headroom report;

The UE sends a first message to the base station in the random access process, where the first message An information segment is included, the information segment being used to indicate the power headroom report, wherein the information segment includes one or more information bits.
The method of claim 11 wherein:

The first message is a third message (message 3) of the random access procedure, and the message 3 is used by the UE to establish a radio resource control (RRC) connection with the base station.
A method for indicating a Power Headroom Report (PHR) for a narrowband Internet of Things (NB-IoT) system, comprising:

The terminal device UE determines a power headroom report;

The UE sends a first message to the base station on the uplink channel, where the first message includes an information segment, where the information segment is used to indicate the power headroom report, where the information segment includes one or more information bits.
A method according to any one of claims 11 to 13, wherein

The power headroom report includes a difference between the estimated uplink power of the UE and the maximum power of the UE.
A method according to any one of claims 11 to 13, wherein

The power headroom report includes a set of the maximum number of subcarriers or a number of subcarriers supported by the UE or any one of the sets of the number of subcarriers.
A method according to any one of claims 11 to 15, wherein

The information segment is used to indicate the power headroom report, and specifically includes:

The information segment is used to determine a first state, where the first state indicates that the UE sends the power headroom report to the base station;

The UE sends a second message to the base station according to the indication of the first state, where the second message includes the power headroom report.
A method according to any one of claims 11, 12, 14, 15 or 16, wherein

The UE further includes: before the sending, by the UE, the first message to the base station in the random access process;

The UE sends a random access preamble sequence to the base station.
The method of claim 11 wherein

The first message is a random access preamble sequence.
The method according to claim 18, wherein the information segment is used to determine a second state, and the second state indicates that the UE sends the power headroom report to the base station;

The UE sends a third message to the base station according to the indication of the second state, where the third message includes the power headroom report.
A method for indicating a Power Headroom Report (PHR) for a narrowband Internet of Things (NB-IoT) system, comprising:

Receiving, by the base station, the first message sent by the terminal device UE;

The base station parses the first message to obtain a power headroom report;

The base station determines scheduling information or power control information of the UE according to the power headroom report.
A narrowband Internet of Things (NB-IoT) communication system, comprising the terminal device UE according to any one of claims 1-9 and the base station according to claim 10.