Disclosure of Invention
The embodiment of the invention aims to provide a resource allocation method, which solves the problem that a base station and a terminal uniformly start the enhancement scheme and negotiate resources according to the enhancement scheme.
In a first aspect, a method for resource configuration, the method comprising:
the base station judges whether a preset condition for starting the enhancement scheme is met;
if yes, the base station communicates with the terminal according to the resources used by the pre-agreed enhancement scheme;
or the base station negotiates resources used by an enhancement scheme with the terminal in a dynamic configuration mode and communicates with the terminal according to the resources used by the enhancement scheme; the resources used by the enhancement scheme include, but are not limited to, one or a combination of: an indication of whether the enhancement scheme is enabled, a time when the enhancement scheme is enabled, a time domain, a frequency domain, a code domain, or a space domain resource used by the enhancement scheme, a device type or a service type of a terminal using the enhancement scheme.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the determining, by the base station, whether a preset condition for starting an enhancement scheme is met includes:
and the base station judges whether the preset time for starting the enhancement scheme is reached.
With reference to the first aspect, in a second possible implementation manner of the first aspect, the determining, by the base station, whether a preset condition for starting an enhancement scheme is met includes:
the base station judges whether a preset resource utilization rate for starting the enhancement scheme is achieved, wherein the resource utilization rate is the ratio of the resource used by the base station to the total resource of the base station in a preset time period.
With reference to the first possible implementation manner of the first aspect or the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the negotiating, by the base station and the terminal, resources used by the enhancement scheme by a dynamic configuration manner includes:
the base station configures the resources used by the enhancement scheme, and negotiates the resources used by the enhancement scheme with the terminal through the transmission mode of the high-level signaling or the physical layer signaling.
With reference to the first possible implementation manner of the first aspect or the second possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the manner of dynamic configuration includes a manner of dynamic configuration and a manner of predefined combination;
the base station negotiates with the terminal for resources used by the enhancement scheme through a dynamic configuration mode, and the resources comprise:
the base station configures part of resources used by the enhancement scheme, and negotiates the part of resources used by the enhancement scheme with the terminal through a transmission mode of high-layer signaling or physical layer signaling, wherein other resources used by the enhancement scheme are predetermined by the base station and the terminal in advance.
In a second aspect, a method of resource configuration, the method comprising:
the terminal judges whether a preset condition for starting the enhancement scheme is met;
if yes, the terminal communicates with the base station according to the resources used by the pre-agreed enhancement scheme;
or the terminal negotiates resources used by an enhancement scheme with the base station in a dynamic configuration mode and communicates with the base station according to the resources used by the enhancement scheme; the resources used by the enhancement scheme include, but are not limited to, one or a combination of: an indication of whether the enhancement scheme is enabled, a time when the enhancement scheme is enabled, a time domain, a frequency domain, a code domain, or a space domain resource used by the enhancement scheme, a device type or a service type of a terminal using the enhancement scheme.
With reference to the second aspect, in a first possible implementation manner of the second aspect, the determining, by the terminal, whether a preset condition for starting an enhancement scheme is reached includes:
and the terminal judges whether the preset time for starting the enhancement scheme is reached.
With reference to the second aspect, in a second possible implementation manner of the second aspect, the determining, by the terminal, whether a preset condition for starting an enhancement scheme is reached includes:
and the terminal judges whether to use preset resources to receive the instruction of starting the enhancement scheme sent by the base station.
With reference to the first possible implementation manner of the second aspect or the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the negotiating, by the terminal and the base station, resources used by the enhancement scheme through a dynamic configuration method includes:
and the terminal receives the resources used by the enhancement scheme sent by the base station through the transmission mode of the high-level signaling or the physical-layer signaling.
With reference to the first possible implementation manner of the second aspect or the second possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the manner of dynamic configuration includes a manner of dynamic configuration and a manner of predefined combination;
the terminal negotiates resources used by the enhancement scheme with the base station in a dynamic configuration mode, and the resources comprise:
the terminal receives a part of resources used by the enhancement scheme sent by the base station through a transmission mode of high-layer signaling or physical-layer signaling, and other resources used by the enhancement scheme are predetermined by the base station and the terminal in advance.
In a third aspect, a base station, the base station comprising:
the first judging unit is used for judging whether a preset condition for starting the enhancement scheme is met by the base station;
a first resource negotiation unit, configured to, if yes, enable the base station to communicate with the terminal according to a resource used by the pre-agreed enhancement scheme;
or the base station negotiates resources used by an enhancement scheme with the terminal in a dynamic configuration mode and communicates with the terminal according to the resources used by the enhancement scheme; the resources used by the enhancement scheme include, but are not limited to, one or a combination of: an indication of whether the enhancement scheme is enabled, a time when the enhancement scheme is enabled, a time domain, a frequency domain, a code domain, or a space domain resource used by the enhancement scheme, a device type or a service type of a terminal using the enhancement scheme.
With reference to the third aspect, in a first possible implementation manner of the third aspect, the first determining unit includes:
and the base station judges whether the preset time for starting the enhancement scheme is reached.
With reference to the third aspect, in a second possible implementation manner of the third aspect, the first determining unit includes:
the base station judges whether a preset resource utilization rate for starting the enhancement scheme is achieved, wherein the resource utilization rate is the ratio of the resource used by the base station to the total resource of the base station in a preset time period.
With reference to the first possible implementation manner of the third aspect or the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the negotiating, by the first resource negotiating unit, the resource used by the base station and the terminal to negotiate the enhancement scheme through a dynamic configuration manner includes:
the base station configures the resources used by the enhancement scheme, and negotiates the resources used by the enhancement scheme with the terminal through the transmission mode of the high-level signaling or the physical layer signaling.
With reference to the first possible implementation manner of the third aspect or the second possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the manner of dynamic configuration includes a manner of dynamic configuration and a manner of predefined combination;
the first resource negotiation unit includes:
the base station configures part of resources used by the enhancement scheme, and negotiates the part of resources used by the enhancement scheme with the terminal through a transmission mode of high-layer signaling or physical layer signaling, wherein other resources used by the enhancement scheme are predetermined by the base station and the terminal in advance.
In a fourth aspect, a terminal, the terminal comprising:
the second judgment unit is used for judging whether the preset condition for starting the enhancement scheme is met or not by the terminal;
a second resource negotiation unit, configured to, if yes, enable the terminal to communicate with the base station according to a resource used by the pre-agreed enhancement scheme;
or the terminal negotiates resources used by an enhancement scheme with the base station in a dynamic configuration mode and communicates with the base station according to the resources used by the enhancement scheme; the resources used by the enhancement scheme include, but are not limited to, one or a combination of: an indication of whether the enhancement scheme is enabled, a time when the enhancement scheme is enabled, a time domain, a frequency domain, a code domain, or a space domain resource used by the enhancement scheme, a device type or a service type of a terminal using the enhancement scheme.
With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the second determining unit includes:
and the terminal judges whether the preset time for starting the enhancement scheme is reached.
With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the second determining unit includes:
and the terminal judges whether to use preset resources to receive the instruction of starting the enhancement scheme sent by the base station.
With reference to the first possible implementation manner of the fourth aspect or the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the negotiating, by the second resource negotiation unit, resources used by the terminal to negotiate the enhancement scheme through a dynamic configuration method and a base station includes:
and the terminal receives the resources used by the enhancement scheme sent by the base station through the transmission mode of the high-level signaling or the physical-layer signaling.
With reference to the first possible implementation manner of the fourth aspect or the second possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the manner of dynamic configuration includes a manner of dynamic configuration and a manner of predefined combination;
the second resource negotiation unit includes:
the terminal receives a part of resources used by the enhancement scheme sent by the base station through a transmission mode of high-layer signaling or physical-layer signaling, and other resources used by the enhancement scheme are predetermined by the base station and the terminal in advance.
Compared with the prior art, the method for resource allocation provided by the embodiment of the invention negotiates resources through a base station and a terminal in an agreed and/or dynamic allocation mode, so that the time and resources, the equipment type and the service type of the terminal are consistent when the base station and the terminal start an enhancement scheme, the resource utilization rate is improved, and the influence on other users caused by the fact that the base station uses the same resources in the enhancement scheme when serving other users except the terminal is avoided.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Example one
Referring to fig. 1, fig. 1 is a flowchart of a method for resource allocation according to an embodiment of the present invention. The method comprises the following steps:
step 101, a base station judges whether a preset condition for starting an enhancement scheme is met;
preferably, the determining, by the base station, whether a preset condition for starting the enhancement scheme is reached includes:
and the base station judges whether the preset time for starting the enhancement scheme is reached.
Preferably, the determining, by the base station, whether a preset condition for starting the enhancement scheme is reached includes:
the base station judges whether a preset resource utilization rate for starting the enhancement scheme is achieved, wherein the resource utilization rate is the ratio of the resource used by the base station to the total resource of the base station in a preset time period.
102, if yes, the base station communicates with a terminal according to the resources used by the pre-agreed enhancement scheme;
or the base station negotiates resources used by an enhancement scheme with the terminal in a dynamic configuration mode and communicates with the terminal according to the resources used by the enhancement scheme; in the present invention, the resources used in the enhancement scheme include, but are not limited to, one or a combination of the following: an indication of whether the enhancement scheme is enabled, a time when the enhancement scheme is enabled, a time domain, a frequency domain, a code domain, or a space domain resource used by the enhancement scheme, a device type or a service type of a terminal using the enhancement scheme.
Preferably, the base station negotiates with the terminal for resources used by the enhancement scheme through a dynamic configuration mode, where the resources include:
the base station configures the resources used by the enhancement scheme, and negotiates the resources used by the enhancement scheme with the terminal through the transmission mode of the high-level signaling or the physical layer signaling.
Preferably, the dynamic configuration mode comprises a dynamic configuration and a default combination mode;
the base station negotiates with the terminal for resources used by the enhancement scheme through a dynamic configuration mode, and the resources comprise:
the base station configures part of resources used by the enhancement scheme, and negotiates the part of resources used by the enhancement scheme with the terminal through a transmission mode of high-layer signaling or physical layer signaling, wherein other resources used by the enhancement scheme are predetermined by the base station and the terminal in advance.
The preset resource is used by the base station and the terminal for transmitting the enhancement scheme to the terminal by using which resource the base station uses before starting the enhancement scheme. When the base station judges that the time for starting the enhancement scheme or the starting time period is reached, the base station sends the resources used by the enhancement scheme to the terminal by using the preset resources, and the terminal also receives the resources used by the enhancement scheme sent by the base station by using the same preset resources.
The embodiment of the invention provides a resource allocation method, wherein a base station and a terminal negotiate resources in an agreed or dynamic allocation mode, so that the base station and the terminal are in agreement on time or frequency resources for starting an enhancement scheme or equipment types or service types of the terminal, and the resource allocation is realized.
Example two
Referring to fig. 2, fig. 2 is a flowchart of a resource allocation method according to a second embodiment of the present invention. The method comprises the following steps:
step 201, the terminal judges whether a preset condition for starting the enhancement scheme is reached;
preferably, the terminal determining whether a preset condition for starting the enhancement scheme is reached includes:
and the terminal judges whether the preset time for starting the enhancement scheme is reached.
Preferably, the terminal determining whether a preset condition for starting the enhancement scheme is reached includes:
and the terminal judges whether to use preset resources to receive the instruction of starting the enhancement scheme sent by the base station.
The terminal issues the instruction to start the enhancement scheme, which may be 1 or 0, where 1 represents to start the enhancement scheme and 0 represents not to start the enhancement scheme, but is not limited to this implementation. The indication of starting the enhancement scheme and the indication of whether the enhancement scheme is started in the resources used by the enhancement scheme belong to the same indication.
Step 202, if yes, the terminal communicates with the base station according to the resources used by the pre-agreed enhancement scheme;
or the terminal negotiates resources used by an enhancement scheme with the base station in a dynamic configuration mode and communicates with the base station according to the resources used by the enhancement scheme;
preferably, the dynamic configuration mode comprises a dynamic configuration and a default combination mode;
preferably, the negotiating, by the terminal and the base station through the dynamically configured method, resources used by the enhancement scheme includes:
and the terminal receives the resources used by the enhancement scheme sent by the base station through the transmission mode of the high-level signaling or the physical-layer signaling.
Preferably, the dynamic configuration mode comprises a dynamic configuration and a default combination mode;
the terminal negotiates resources used by the enhancement scheme with the base station in a dynamic configuration mode, and the resources comprise:
the terminal receives a part of resources used by the enhancement scheme sent by the base station through a transmission mode of high-layer signaling or physical-layer signaling, and other resources used by the enhancement scheme are predetermined by the base station and the terminal in advance.
The embodiment of the invention provides a resource allocation method, wherein a base station and a terminal negotiate resources in an agreed or dynamic allocation mode, so that the base station and the terminal are in agreement on time or frequency resources for starting an enhancement scheme or equipment types or service types of the terminal, and the resource allocation is realized.
EXAMPLE III
Referring to fig. 3, fig. 3 is a flowchart of a method for resource allocation according to a third embodiment of the present invention. The method of the third embodiment is specifically described below by taking an implementation manner as an example, the order of the steps in fig. 3 is only one implementation manner, and the third embodiment of the present invention is not limited to the order of the steps. The method comprises the following steps:
step 301, the base station judges whether a preset condition for starting the enhancement scheme is reached;
specifically, the conditions include, but are not limited to: the terminal judges whether the preset time for starting the enhancement scheme is reached; the base station judges whether the preset resource utilization rate of the enhanced starting scheme is reached; meanwhile, the terminal judges whether the preset time for starting the enhancement scheme and the resource utilization rate are reached.
Step 302, if yes, the base station negotiates resources used by the enhancement scheme with the terminal according to a dynamic configuration method;
specifically, the negotiating about the resource used by the enhanced scheme with the terminal by the base station through a dynamic configuration mode includes:
the base station configures part of resources used by the enhancement scheme, and negotiates the part of resources used by the enhancement scheme with the terminal through a transmission mode of high-layer signaling or physical layer signaling, wherein other resources used by the enhancement scheme are predetermined by the base station and the terminal in advance.
303, the base station negotiates with the terminal for a part of resources used by the enhancement scheme through a transmission mode of a high-level signaling or a physical layer signaling;
step 304, the terminal judges whether the preset condition for starting the enhancement scheme is reached;
specifically, the conditions include, but are not limited to: the terminal judges whether the preset time for starting the enhancement scheme is reached; or the terminal judges whether to use preset resources to receive the instruction of starting the enhancement scheme sent by the base station.
It can be realized that when the base station negotiates the partial resource used by the enhancement scheme with the terminal through the transmission mode of the high-level signaling or the physical-level signaling, the terminal judges and receives the indication of starting the enhancement scheme sent by the base station according to the enhancement scheme sent by the base station.
Step 305, if yes, the terminal judges whether Reference Signal Receiving Power (RSRP) of the terminal is lower than a preset threshold value;
step 306, if yes, the terminal uses preset resources to receive an instruction for starting the enhancement scheme sent by the base station;
step 307, the terminal judges that an instruction for starting the enhancement scheme is received;
step 308, if the terminal determines that the indication for starting the enhancement scheme is received, the terminal uses a part of resources used by the enhancement scheme, which are sent by the base station through a transmission mode of a high-level signaling or a physical-level signaling, and other resources used by the enhancement scheme are predetermined by the base station and the terminal in advance.
The embodiment of the invention provides a resource allocation method, wherein a base station and a terminal negotiate resources in an agreed or dynamic allocation mode, so that the base station and the terminal are in agreement on time or frequency resources for starting an enhancement scheme or equipment types or service types of the terminal, and the resource allocation is realized.
Example four
Referring to fig. 4, fig. 4 is a structural diagram of a base station according to a fourth embodiment of the present invention. As shown in fig. 4, the base station includes the following units:
a first judgment unit 401, configured to judge whether a preset condition for starting an enhancement scheme is met by a base station;
preferably, the first judging unit is specifically configured to:
and the base station judges whether the preset time for starting the enhancement scheme is reached.
Preferably, the first judging unit is specifically configured to:
the base station judges whether a preset resource utilization rate for starting the enhancement scheme is achieved, wherein the resource utilization rate is the ratio of the resource used by the base station to the total resource of the base station in a preset time period.
A first resource negotiation unit 402, configured to, if yes, perform communication with the terminal by the base station according to a resource used by the pre-agreed enhancement scheme;
or the base station negotiates with the terminal about the resources used by the enhancement scheme through a dynamic configuration mode, and communicates with the terminal according to the resources used by the enhancement scheme.
Preferably, the resource used by the base station and the terminal for negotiating the enhanced scheme through a dynamic configuration mode in the first resource negotiation unit 402 includes:
the base station configures the resources used by the enhancement scheme, and negotiates the resources used by the enhancement scheme with the terminal through the transmission mode of the high-level signaling or the physical layer signaling.
Preferably, the dynamic configuration mode comprises a dynamic configuration and a default combination mode;
the first resource negotiation unit 402 is specifically configured to:
the base station configures part of resources used by the enhancement scheme, and negotiates the part of resources used by the enhancement scheme with the terminal through a transmission mode of high-layer signaling or physical layer signaling, wherein other resources used by the enhancement scheme are predetermined by the base station and the terminal in advance.
Specifically, when the base station judges whether the preset time for starting the enhancement scheme is reached, the base station communicates with the terminal according to the preset resources used by the enhancement scheme; or the base station negotiates with the terminal about the resources used by the enhancement scheme through a dynamic configuration mode, and communicates with the terminal according to the resources used by the enhancement scheme.
Specifically, when a base station judges that the resource utilization rate of a preset enhanced scheme is reached, the base station communicates with a terminal according to the preset resources used by the enhanced scheme; or the base station negotiates with the terminal about the resources used by the enhancement scheme through a dynamic configuration mode, and communicates with the terminal according to the resources used by the enhancement scheme.
The resource utilization rate is a ratio of the resource used by the base station to the total resource of the base station in a preset time period.
The preset resource is used by the base station and the terminal for transmitting the enhancement scheme to the terminal by using which resource the base station uses before starting the enhancement scheme. When the base station judges that the time for starting the enhancement scheme or the starting time period is reached, the base station sends the resources used by the enhancement scheme to the terminal by using the preset resources, and the terminal also receives the resources used by the enhancement scheme sent by the base station by using the same preset resources.
The embodiment of the invention provides a base station, wherein the base station and a terminal negotiate resources in an agreed or dynamic configuration mode, so that the base station and the terminal are in agreement on time or frequency resources for starting an enhancement scheme or equipment types or service types of the terminal, and the configuration of the resources is realized.
EXAMPLE five
Referring to fig. 5, fig. 5 is a structural diagram of a terminal according to a fifth embodiment of the present invention. The terminal comprises the following units:
a second judging unit 501, configured to judge whether a preset condition for starting an enhancement scheme is met by the terminal;
preferably, the second determining unit 501 is specifically configured to:
and the terminal judges whether the preset time for starting the enhancement scheme is reached.
Preferably, the second determining unit 501 is specifically configured to:
and the terminal judges whether to use preset resources to receive the instruction of starting the enhancement scheme sent by the base station.
The terminal issues the instruction to start the enhancement scheme, which may be 1 or 0, where 1 represents to start the enhancement scheme and 0 represents not to start the enhancement scheme, but is not limited to this implementation. The indication of starting the enhancement scheme and the indication of whether the enhancement scheme is started in the resources used by the enhancement scheme belong to the same indication.
A second resource negotiation unit 502, configured to, if yes, enable the terminal to communicate with the base station according to a resource used by the pre-agreed enhancement scheme;
or the terminal negotiates resources used by an enhancement scheme with the base station in a dynamic configuration mode and communicates with the base station according to the resources used by the enhancement scheme;
preferably, the resource used by the terminal to negotiate the enhancement scheme through a dynamically configured method and a base station in the second resource negotiation unit 502 includes:
and the terminal receives the resources used by the enhancement scheme sent by the base station through the transmission mode of the high-level signaling or the physical-layer signaling.
Preferably, the dynamic configuration mode comprises a dynamic configuration and a default combination mode;
the second resource negotiation unit 502 is specifically configured to:
the terminal receives a part of resources used by the enhancement scheme sent by the base station through a transmission mode of high-layer signaling or physical-layer signaling, and other resources used by the enhancement scheme are predetermined by the base station and the terminal in advance.
Specifically, when the terminal judges that the preset time for starting the enhancement scheme is reached, the terminal communicates with the base station according to the preset resources used by the enhancement scheme;
or the terminal negotiates with the base station about the resources used by the enhancement scheme through a dynamic configuration mode, and communicates with the base station according to the resources used by the enhancement scheme.
Specifically, when a terminal can receive an instruction for starting an enhancement scheme sent by a base station by using a preset resource, the terminal communicates with the base station according to the preset resource used by the enhancement scheme;
or the terminal negotiates with the base station about the resources used by the enhancement scheme through a dynamic configuration mode, and communicates with the base station according to the resources used by the enhancement scheme.
The embodiment of the invention provides a terminal, wherein a base station and the terminal negotiate resources in an agreed or dynamic configuration mode, so that the base station and the terminal reach the agreement on time or frequency resources for starting an enhancement scheme or equipment types or service types of the terminal, and the resource configuration is realized.
EXAMPLE six
Referring to fig. 6, fig. 6 is a structural diagram of a base station according to a sixth embodiment of the present invention. Referring to fig. 6, fig. 6 is a base station 600 according to an embodiment of the present invention, where the base station 600 includes:
a processor (processor)601, a communication Interface (Communications Interface)602, a memory (memory)603, and a bus 604.
The processor 601, the communication interface 602, and the memory 603 communicate with each other via the bus 604.
A communication interface 602 for communicating with a terminal;
and a processor 601 for executing the program a.
In particular, program a may comprise program code comprising computer operating instructions.
The processor 601 may be a central processing unit CPU or an application Specific Integrated circuit asic or one or more Integrated circuits configured to implement embodiments of the present invention.
The memory 603 stores a program a. The memory 603 may include a high-speed RAM memory and may also include a non-volatile memory (non-volatile memory). The program a may specifically include:
the base station judges whether a preset condition for starting the enhancement scheme is met;
if yes, the base station communicates with the terminal according to the resources used by the pre-agreed enhancement scheme;
or, the base station negotiates with the terminal for the resources used by the enhancement scheme through a dynamic configuration mode, and communicates with the terminal according to the resources used by the enhancement scheme.
EXAMPLE seven
Referring to fig. 7, fig. 7 is a block diagram of a terminal according to a seventh embodiment of the present invention. Referring to fig. 7, fig. 7 is a terminal 700 according to an embodiment of the present invention, where the terminal 700 includes:
a processor (processor)701, a communication Interface (Communications Interface)702, a memory (memory)703, and a bus 704.
The processor 701, the communication interface 702, and the memory 703 communicate with each other via the bus 704.
A communication interface 702 for communicating with a base station;
and a processor 701 for executing the program a.
In particular, program a may comprise program code comprising computer operating instructions.
The processor 701 may be a central processing unit CPU or an application Specific Integrated circuit asic or one or more Integrated circuits configured to implement embodiments of the present invention.
The memory 703 is used for storing the program a. The memory 703 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory). The program a may specifically include:
the terminal judges whether a preset condition for starting the enhancement scheme is met;
if yes, the terminal communicates with the base station according to the resources used by the pre-agreed enhancement scheme;
or the terminal negotiates with the base station about the resources used by the enhancement scheme through a dynamic configuration mode, and communicates with the base station according to the resources used by the enhancement scheme.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.