CN106953720B - Signal sending method, device and system - Google Patents
Signal sending method, device and system Download PDFInfo
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- CN106953720B CN106953720B CN201610009018.7A CN201610009018A CN106953720B CN 106953720 B CN106953720 B CN 106953720B CN 201610009018 A CN201610009018 A CN 201610009018A CN 106953720 B CN106953720 B CN 106953720B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
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Abstract
The application provides a signal sending method, a signal sending device and a signal sending system. The method comprises the following steps: the base station determines the position for sending the pilot signal according to the stored pilot position numbering formula, determines the position of the control signal by using a first control signal position numbering formula according to the number of the current service terminal, determines the position of the control signal by using a second control signal position numbering formula, and informs the terminal of determining the position of the control signal by using a corresponding position numbering formula; data signals are transmitted on REs other than the transmission control signals and the pilot signals. By the technical scheme, the system time delay can be reduced.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a signal transmission method, apparatus, and system.
Background
As more wireless transmission based technologies emerge, the requirement for delay becomes more and more strict, and it is difficult for the end-to-end delay of 10ms supported by the conventional LTE system to meet the future network requirement. The requirement of 1ms air interface delay gradually becomes the target of the next network design.
For existing LTE systems, the basic data transmission is based on 1ms subframes. In order to meet the air interface delay of 1ms, symbol-level data scheduling and transmission need to be supported in a physical layer; for LTE systems, however, it is not easy to support symbol-level data transmission and scheduling, since existing LTE system control channel and reference symbol designs do not support data transmission to the symbol level.
As can be seen from the above, the transmission of the pilot signal and the control signal in the existing LTE system cannot meet the requirement of low delay.
Disclosure of Invention
In view of this, the present application provides a signal transmission method, apparatus and system to reduce system delay.
In order to solve the technical problem, the technical scheme of the application is realized as follows:
a method of signaling, the method comprising:
the base station determines a pilot frequency position number according to a stored pilot frequency position number formula, determines an RE number corresponding to the pilot frequency position number according to the mapping relation between the stored position number and the RE number of a resource block in each symbol, and sends a pilot frequency signal at a position corresponding to the determined RE number;
when the number of the current service terminals is less than Q, determining a control signal position number according to a stored first control signal position number formula, determining an RE number corresponding to the control signal position number according to a mapping relation between the stored position number and the RE number in each symbol, and sending a control signal at a position corresponding to the determined RE number; informing the terminal to determine the position of the control signal by using a stored first control signal position numbering formula at present;
when the number of the current service terminals is not less than Q, determining a position number of the control signal according to a stored second control signal position number formula, determining an RE number corresponding to the position number of the control signal according to a mapping relation between the stored position number and the RE number in each symbol, and sending the control signal at the position corresponding to the determined RE number; informing the terminal to determine the position of the control signal by using a stored second control signal position numbering formula;
data signals are transmitted on REs other than the transmission control signals and the pilot signals.
A signal transmission apparatus, the apparatus comprising: the device comprises a storage unit, a determination unit, a sending unit and a notification unit;
the storage unit is used for storing a pilot frequency position numbering formula, a first control signal position numbering formula, a second control signal position numbering formula and a mapping relation between a position number and a resource block RE number in each symbol;
the determining unit is configured to determine a pilot position number according to the pilot position number formula stored in the storage unit, and determine an RE number corresponding to the pilot position number according to a mapping relationship between the stored position number and the RE number in each symbol; when the number of the current service terminals is less than Q, determining the position number of the control signal according to a first control signal position number formula stored in the storage unit, and determining the RE number corresponding to the position number of the control signal according to the mapping relation between the stored position number and the RE number in each symbol; when the number of the current service terminals is not less than Q, determining the position number of the control signal according to a second control signal position number formula stored in the storage unit, and determining the RE number corresponding to the position number of the control signal according to the mapping relation between the stored position number and the RE number in each symbol;
the transmitting unit is configured to transmit a pilot signal at a position corresponding to the RE number determined by the determining unit; sending a control signal at a position corresponding to the RE number determined by the determining unit; transmitting a data signal on an RE other than the transmission control signal and the pilot signal;
the notification unit is used for notifying the terminal to currently use the stored first control signal position numbering formula to determine the position of the control signal when the determination unit determines that the number of the current service terminals is smaller than Q; and when the determining unit determines that the number of the current service terminals is not less than Q, informing the terminals of determining the positions of the control signals by using the stored second control signal position numbering formula.
A signal transmission system, the system comprising: a base station and a terminal;
the base station determines a pilot frequency position number according to a stored pilot frequency position number formula, determines an RE number corresponding to the pilot frequency position number according to the mapping relation between the stored position number and the RE number of a resource block in each symbol, and sends a pilot frequency signal at a position corresponding to the determined RE number; when the number of the current service terminals is less than Q, determining a control signal position number according to a stored first control signal position number formula, determining an RE number corresponding to the control signal position number according to a mapping relation between the stored position number and the RE number in each symbol, and sending a control signal at a position corresponding to the determined RE number; informing the terminal to determine the position of the control signal by using a stored first control signal position numbering formula at present; when the number of the current service terminals is not less than Q, determining a position number of the control signal according to a stored second control signal position number formula, determining an RE number corresponding to the position number of the control signal according to a mapping relation between the stored position number and the RE number in each symbol, and sending the control signal at the position corresponding to the determined RE number; informing the terminal to determine the position of the control signal by using a stored second control signal position numbering formula; transmitting a data signal on an RE other than the transmission control signal and the pilot signal;
the terminal determines a pilot frequency position number according to a stored pilot frequency position number formula, determines an RE number corresponding to the pilot frequency position number according to the mapping relation between the stored position number and the RE number in each symbol, and acquires a pilot frequency signal at a position corresponding to the determined RE number; when receiving a notification sent by a base station that the position of a control signal is determined by using a stored first control signal position numbering formula currently, determining the position number of the control signal according to the stored first control signal position numbering formula, determining an RE number corresponding to the position number of the control signal according to the mapping relation between the stored position number and the RE number in each symbol, and acquiring the control signal at the position corresponding to the determined RE number; when receiving a notification sent by a base station that the position of a control signal is determined by using a stored second control signal position numbering formula currently, determining the position number of the control signal according to the stored second control signal position numbering formula, determining the RE number corresponding to the position number of the control signal according to the mapping relation between the stored position number and the RE number in each symbol, and acquiring the control signal at the position corresponding to the determined RE number.
According to the technical scheme, the positions of the pilot signal and the control signal are determined through the configured formula, the positions of the pilot signal and the control signal can be determined at the terminal according to the configured formula, so that the pilot signal and the control signal can be rapidly acquired, and the system delay is reduced by supporting symbol-level signal transmission.
Drawings
Fig. 1 is a schematic flow chart of a signal transmission method in an embodiment of the present application;
FIG. 2 is a diagram illustrating the determination of control signal positions using a first control signal position numbering formula in an embodiment of the present application;
FIG. 3 is a schematic diagram of an apparatus for implementing the above technique;
fig. 4 is a schematic diagram of a system applied to the above technology in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the technical solutions of the present invention are described in detail below with reference to the accompanying drawings and examples.
In the embodiment of the application, the control signal generally occupies 1-3 symbols in the existing LTE system; however, pilot signals are not distributed on all symbols, and channel estimation cannot be performed on symbols without pilot signals, and data demodulation cannot be performed, so that to solve the problem of data transmission on 1 symbol, a control signal and a pilot signal need to be introduced on the symbol.
Referring to fig. 1, fig. 1 is a schematic flow chart of a signal transmission method in an embodiment of the present application. The method comprises the following specific steps:
In the step, the numbering formula of the pilot frequency position is a 6m +3 p-2; wherein m is 0,1,2, …, N/6-1, N is the number of RE in each symbol; p is the number of supported antenna ports and N is a multiple of 12.
And when the position of the pilot signal is determined, the pilot position numbering formula is used for determining the pilot position number, the RE number corresponding to the pilot position number is determined according to the mapping relation between the locally stored position number and the RE number, and the pilot signal is acquired at the position corresponding to the determined RE number.
The process of determining the position of the pilot signal is the same on the base station side and the terminal side in the embodiment of the present application. The base station can obtain the number of REs in each symbol and the number of supported antenna ports, and broadcast the number to each served terminal, and each terminal stores the number of REs in each symbol and the number of supported antenna ports for determining the position of the pilot signal and the position of the control signal in the following.
The pilot frequency position number formula stored on the terminal can be directly configured on the terminal, or can be sent to the terminal by the base station and stored by the terminal.
When N is 24, m is 0,1,2, 3; and P is 2, the positions of the pilots are numbered 4,10,16, 22.
102, when the base station determines that the number of the current service terminals is smaller than Q, determining a control signal position number according to a stored first control signal position number formula, determining an RE number corresponding to the control signal position number according to a mapping relation between the stored position number and the RE number in each symbol, and sending a control signal at a position corresponding to the determined RE number; and informing the terminal to determine the control signal position currently using the stored first control signal position numbering formula.
In a specific implementation, Q is an integer, and is configured according to a specific application, such as Q configured as 20. Here, when the number of current serving terminals is smaller than Q, it is considered that the number of terminals is small and the overhead of the control channel is small.
In the step, the numbering formula of the first control signal is that a is 6m +3 p-2; wherein m is 0,1,2, …, N/6-1; n is the number of RE in each symbol; p is the number of supported antenna ports and N is a multiple of 12.
At each terminal, a first control signal position numbering formula is also stored.
When the base station is informed to determine the position of the control signal by using the stored first control signal position numbering formula, the position numbering formula of the control signal is used to determine the position number of the control signal when the position of the control signal is determined, the RE number corresponding to the position number of the control signal is determined according to the mapping relation between the locally stored position number and the RE number, and the control signal is obtained at the position corresponding to the determined RE number.
And when the number of the current service terminals is less than Q, the base station and the terminals use the first control signal numbering formula to carry out control signal position numbering calculation.
The base station determines the corresponding RE number by using the calculated position number, and transmits a control signal at the position corresponding to the RE number.
And the terminal determines the corresponding RE number by using the calculated position number, and acquires the control signal sent by the base station at the position corresponding to the RE number.
When receiving a notification sent by a base station and used for determining the position of a control signal by using a stored first control signal position numbering formula currently, a terminal determines the position number of the control signal according to the stored first control signal position numbering formula, determines an RE number corresponding to the position number of the control signal according to the mapping relation between the stored position number and the RE number, and acquires the control signal at the position corresponding to the determined RE number.
And when receiving the notice that the position of the control signal is determined by using the currently stored first control signal position numbering formula and the notice that the position of the control signal is determined by using the currently stored second control signal numbering formula, which is sent by the base station, the terminal determines the position of the control signal by using the first control signal position numbering formula.
103, when the base station determines that the number of the current service terminals is not less than Q, determining a control signal position number according to a stored second control signal position number formula, determining an RE number corresponding to the control signal position number according to a mapping relation between the stored position number and the RE number in each symbol, and sending a control signal at a position corresponding to the determined RE number; and informing the terminal to determine the control signal position currently using the stored second control signal position numbering formula.
When the number of the current service terminals is not less than Q, the number of the terminals is considered to be more, and the condition that the control channel overhead is larger is needed.
The second control signal numbering formula is b-6 s +3p-7,6s +3p-1, wherein s-1, 3,5, N/6-1;
wherein, N is the number of RE in each symbol; p is the number of supported antenna ports and N is a multiple of 12.
On each terminal, a second control signal position numbering formula is also stored.
When the base station is informed to determine the position of the control signal by using the stored second control signal position numbering formula, the second control signal position numbering formula is used to determine the position number of the control signal when the position of the control signal is determined, the RE number corresponding to the position number of the control signal is determined according to the mapping relation between the locally stored position number and the RE number, and the control signal is obtained at the position corresponding to the determined RE number.
And when the number of the current service terminals is not less than Q, the base station and the terminal use a second control signal numbering formula to carry out control signal position numbering calculation.
The base station determines the corresponding RE number by using the calculated position number, and transmits a control signal at the position corresponding to the RE number.
And the terminal determines the corresponding RE number by using the calculated position number, and acquires the control signal sent by the base station at the position corresponding to the RE number.
In particular, the present application is implemented by using a position close to the pilot as the control channel transmission, considering that the control channel requires higher accuracy of demodulation than the data channel.
Considering that the number of terminals supported by the system is different in different scenarios, and when the number of terminals is large, the overhead of the control channel is inevitably large, and the number of terminals is increased differently, the two manners for determining the position of the control channel are provided in the embodiment of the present application.
When receiving a notification sent by a base station and currently using a stored second control signal position numbering formula to determine a control signal position, a terminal determines a control signal position number according to the stored second control signal position numbering formula, determines an RE number corresponding to the control signal position number according to a mapping relation between the stored position number and the RE number, and acquires a control signal at a position corresponding to the determined RE number.
And when receiving the notification sent by the base station that the position of the control signal is determined by using the currently stored second control signal position numbering formula and during the period that the notification sent by the base station that the position of the control signal is determined by using the currently stored first control signal numbering formula is not received, the terminal determines the position of the control signal by using the second control signal position numbering formula.
In the embodiment of the present application, the control signal, the pilot signal and the data signal can be transmitted on different REs of one symbol, and only one type of signal can be transmitted on one symbol unlike the conventional implementation.
Specific locations for transmitting the pilot signals and the control signals are given in the specific embodiments of the present application, and as for the data signals, the data signals may be transmitted on REs other than the REs where the control signals and the pilot signals are located. How to identify the position of the data signal in the control signal is similar to the conventional implementation and is not described herein again.
The mapping relation between the position number and the RE number in each symbol is pre-configured and stored in the embodiment of the application. If the calculated position numbers are 1 to 12 and the RE numbers are 1 to 12 within each symbol, position number 1 may be mapped to RE number 1, position number 2 mapped to RE number 2, … …, and position number 12 mapped to RE number 12. The position number calculated here is mapped with the RE number in each symbol.
The mapping relationship is only an example, and in specific applications, the mapping relationship of one-to-one correspondence between the position numbers and the RE numbers is ensured, and the mapping is performed in the order from small to large.
In the above embodiment, step 101 is configured to implement sending of a pilot signal; step 102 and step 103 are used for realizing the transmission of control signals; step 104 is used to implement the sending of the data signal, and when the data signal is implemented, the data signal is partially sequenced.
In the embodiment of the application, when informing which stored control signal position numbering formula is currently used for determining the position of the control signal, PBCH notification is used, specifically, a bit is added in a PBCH (physical broadcast channel);
when the base station informs the terminal that the position of the control signal is currently determined by using the stored first control signal position numbering formula, indicating the terminal to determine the position of the control signal by using the stored first control signal position numbering formula through the added bits in the PBCH;
when the base station informs the terminal that the control signal position is currently determined by using the stored second control signal position numbering formula, the terminal is instructed to determine the control signal position by adding bits in the PBCH by using the stored first control signal position numbering formula.
In a specific implementation, bit position 1 to be newly added can be used to indicate that the control signal position is determined by using the first control signal position numbering formula; using bit position 0 to be added means that the control signal position is determined using the second control signal position numbering formula.
According to the scheme, each terminal is informed of the broadcast information through display, the terminal can also be informed in an implicit mode, and the terminal obtains the position of the control signal determined by using which mode through blind detection.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating the determination of the control signal position by using the first control signal position numbering formula in the embodiment of the present application.
In fig. 2, the number of supported antenna ports is 1, and the number of currently served terminals is 12. Assuming a value of Q of 20, the control signal position is determined using the first control signal position numbering formula.
Take RE transmission signals in the dashed box in fig. 2 as an example, where 7 symbols, 12 REs in each symbol, are numbered as 1,2, … …, 12 from top to bottom for the REs in each symbol; the mapping relationship of the position numbers 1 to 12 and the RE number within each symbol is configured. Position number 1 corresponds to RE number 1, position number 2 corresponds to RE numbers 2, … …, and position number 12 corresponds to RE number 12.
And calculating pilot position numbers 1 and 7 according to a pilot position number formula a-6 m +3p-2, and sending acquisition pilot signals on REs in each symbol with the numbers 1 and 7.
And calculating the control signal position number to be 2 according to the first control signal position number formula b to be 6s +3p-7, and sending an acquisition control signal on RE in each symbol with the number of 2.
The boxes marked with vertical lines in fig. 2 represent the locations of the pilot signals; the boxes marked with horizontal lines indicate where the control signals are located.
Based on the same inventive concept, the application also provides a signal sending device. Referring to fig. 3, fig. 3 is a schematic structural diagram of an apparatus applied to the above technology in the practice of the present application. The device includes: a storage unit 301, a determination unit 302, a transmission unit 303, and a notification unit 304;
a storage unit 301, configured to store a pilot position numbering formula, a first control signal position numbering formula, a second control signal position numbering formula, and a mapping relationship between a position number and a resource block RE number in each symbol;
a determining unit 302, configured to determine a pilot position number according to the pilot position number formula stored in the storage unit 301, and determine an RE number corresponding to the pilot position number according to a mapping relationship between the stored position number and the RE number in each symbol; when the number of the current service terminals is less than Q, determining a control signal position number according to a first control signal position number formula stored in the storage unit 301, and determining an RE number corresponding to the control signal position number according to a mapping relation between the stored position number and the RE number in each symbol; when the number of the current service terminals is not less than Q, determining a control signal position number according to a second control signal position number formula stored in the storage unit 301, and determining an RE number corresponding to the control signal position number according to a mapping relationship between the stored position number and an RE number in each symbol;
a transmitting unit 303, configured to transmit a pilot signal at a position corresponding to the RE number determined by the determining unit 302; transmitting a control signal at a position corresponding to the RE number determined by the determining unit 302; transmitting a data signal on an RE other than the transmission control signal and the pilot signal;
a notifying unit 304, configured to notify the terminal that the control signal position is currently determined using the stored first control signal position numbering formula when the determining unit 302 determines that the current number of the service terminals is less than Q; when the determination unit 302 determines that the current number of service terminals is not less than Q, the terminal is notified that the control signal position is currently determined using the stored second control signal position number formula.
Preferably, the first and second liquid crystal films are made of a polymer,
the pilot frequency position numbering formula is a 6m +3 p-2; wherein m is 0,1,2, …, N/6-1;
the first control signal numbering formula is b-6 s +3 p-7;
the second control signal numbering formula is b-6 s +3p-7,6s +3p-1, wherein s-1, 3,5, N/6-1;
wherein, N is the number of RE in each symbol; p is the number of supported antenna ports.
Preferably, the first and second liquid crystal films are made of a polymer,
a notifying unit 304, further configured to add a bit in the PBCH; when the terminal is informed to determine the control signal position by using the stored first control signal position numbering formula currently, indicating the terminal to determine the control signal position by using the stored first control signal position numbering formula through the bit added in the PBCH; instructing the terminal to determine the control signal position using the stored first control signal position numbering formula by adding bits in said PBCH when the terminal is informed that the control signal position is currently determined using the stored second control signal position numbering formula.
The units of the above embodiments may be integrated into one body, or may be separately deployed; may be combined into one unit or further divided into a plurality of sub-units.
The embodiment of the application also provides a signal sending system. Referring to fig. 4, fig. 4 is a schematic diagram of a system applied to the above technology in the embodiment of the present application. The system comprises: a base station and a terminal;
the base station determines a pilot frequency position number according to a stored pilot frequency position number formula, determines an RE number corresponding to the pilot frequency position number according to the mapping relation between the stored position number and the RE number of a resource block in each symbol, and sends a pilot frequency signal at a position corresponding to the determined RE number; when the number of the current service terminals is less than Q, determining a control signal position number according to a stored first control signal position number formula, determining an RE number corresponding to the control signal position number according to a mapping relation between the stored position number and the RE number in each symbol, and sending a control signal at a position corresponding to the determined RE number; informing the terminal to determine the position of the control signal by using a stored first control signal position numbering formula at present; when the number of the current service terminals is not less than Q, determining a position number of the control signal according to a stored second control signal position number formula, determining an RE number corresponding to the position number of the control signal according to a mapping relation between the stored position number and the RE number in each symbol, and sending the control signal at the position corresponding to the determined RE number; informing the terminal to determine the position of the control signal by using a stored second control signal position numbering formula; transmitting a data signal on an RE other than the transmission control signal and the pilot signal;
the terminal determines a pilot frequency position number according to a stored pilot frequency position number formula, determines an RE number corresponding to the pilot frequency position number according to the mapping relation between the stored position number and the RE number in each symbol, and acquires a pilot frequency signal at a position corresponding to the determined RE number; when receiving a notification sent by a base station that the position of a control signal is determined by using a stored first control signal position numbering formula currently, determining the position number of the control signal according to the stored first control signal position numbering formula, determining an RE number corresponding to the position number of the control signal according to the mapping relation between the stored position number and the RE number in each symbol, and acquiring the control signal at the position corresponding to the determined RE number; when receiving a notification sent by a base station that the position of a control signal is determined by using a stored second control signal position numbering formula currently, determining the position number of the control signal according to the stored second control signal position numbering formula, determining the RE number corresponding to the position number of the control signal according to the mapping relation between the stored position number and the RE number in each symbol, and acquiring the control signal at the position corresponding to the determined RE number.
The pilot frequency position numbering formula is a 6m +3 p-2; wherein m is 0,1,2, …, N/6-1;
the first control signal numbering formula is b-6 s +3 p-7;
the second control signal numbering formula is b-6 s +3p-7,6s +3p-1, wherein s-1, 3,5, N/6-1;
wherein, N is the number of RE in each symbol; p is the number of supported antenna ports.
In summary, the present application determines the positions of the pilot signal and the control signal through the configured formula, and can determine the positions of the pilot signal and the control signal at the terminal according to the configured formula to quickly obtain the pilot signal and the control signal, and reduce the system delay by supporting the symbol-level signal transmission.
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, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A method for signaling, the method comprising:
the base station determines a pilot frequency position number according to a stored pilot frequency position number formula, determines an RE number corresponding to the pilot frequency position number according to the mapping relation between the stored position number and the RE number of a resource block in each symbol, and sends a pilot frequency signal at a position corresponding to the determined RE number;
when the number of the current service terminals is less than Q, determining a control signal position number according to a stored first control signal position number formula, determining an RE number corresponding to the control signal position number according to a mapping relation between the stored position number and the RE number in each symbol, and sending a control signal at a position corresponding to the determined RE number; informing the terminal to determine the position of the control signal by using a stored first control signal position numbering formula at present; wherein Q is an integer;
when the number of the current service terminals is not less than Q, determining a position number of the control signal according to a stored second control signal position number formula, determining an RE number corresponding to the position number of the control signal according to a mapping relation between the stored position number and the RE number in each symbol, and sending the control signal at the position corresponding to the determined RE number; informing the terminal to determine the position of the control signal by using a stored second control signal position numbering formula;
transmitting a data signal on an RE other than the transmission control signal and the pilot signal;
wherein the content of the first and second substances,
the pilot frequency position numbering formula is a 6m +3 p-2; wherein m is 0,1,2, …, N/6-1;
the position numbering formula of the first control signal is b-6 s +3 p-7;
the second control signal position numbering formula is b-6 s +3p-7,6s +3p-1, wherein s-1, 3, 5., N/6-1;
wherein, N is the number of RE in each symbol; p is the number of supported antenna ports.
2. The method of claim 1, further comprising: adding a bit in a downlink broadcast channel PBCH;
the informing the terminal of determining the position of the control signal by using the stored first control signal position numbering formula comprises the following steps:
instructing the terminal to determine a control signal position using a stored first control signal position numbering formula by increasing bits in the PBCH;
the informing the terminal of the current determination of the control signal position by using the stored second control signal position numbering formula comprises the following steps:
instructing the terminal to determine the control signal position using the stored second control signal position numbering formula by adding bits in the PBCH.
3. A signal transmission apparatus, characterized in that the apparatus comprises: the device comprises a storage unit, a determination unit, a sending unit and a notification unit;
the storage unit is used for storing a pilot frequency position numbering formula, a first control signal position numbering formula, a second control signal position numbering formula and a mapping relation between a position number and a resource block RE number in each symbol;
the determining unit is configured to determine a pilot position number according to the pilot position number formula stored in the storage unit, and determine an RE number corresponding to the pilot position number according to a mapping relationship between the stored position number and the RE number in each symbol; when the number of the current service terminals is less than Q, determining the position number of the control signal according to a first control signal position number formula stored in the storage unit, and determining the RE number corresponding to the position number of the control signal according to the mapping relation between the stored position number and the RE number in each symbol; when the number of the current service terminals is not less than Q, determining the position number of the control signal according to a second control signal position number formula stored in the storage unit, and determining the RE number corresponding to the position number of the control signal according to the mapping relation between the stored position number and the RE number in each symbol; wherein Q is an integer;
the transmitting unit is configured to transmit a pilot signal at a position corresponding to the RE number determined by the determining unit; sending a control signal at a position corresponding to the RE number determined by the determining unit; transmitting a data signal on an RE other than the transmission control signal and the pilot signal;
the notification unit is used for notifying the terminal to currently use the stored first control signal position numbering formula to determine the position of the control signal when the determination unit determines that the number of the current service terminals is smaller than Q; when the determining unit determines that the number of the current service terminals is not less than Q, the terminal is informed to determine the position of the control signal by using a stored second control signal position numbering formula;
wherein the content of the first and second substances,
the pilot frequency position numbering formula is a 6m +3 p-2; wherein m is 0,1,2, …, N/6-1;
the position numbering formula of the first control signal is b-6 s +3 p-7;
the second control signal position numbering formula is b-6 s +3p-7,6s +3p-1, wherein s-1, 3, 5., N/6-1;
wherein, N is the number of RE in each symbol; p is the number of supported antenna ports.
4. The apparatus of claim 3,
the notification unit is further configured to add a bit in a downlink broadcast channel PBCH; when the terminal is informed to determine the control signal position by using the stored first control signal position numbering formula currently, indicating the terminal to determine the control signal position by using the stored first control signal position numbering formula through the bit added in the PBCH; instructing the terminal to determine the control signal position using the stored second control signal position numbering formula by adding bits in said PBCH when the terminal is informed that the control signal position is currently determined using the stored second control signal position numbering formula.
5. A signal transmission system, comprising: a base station and a terminal;
the base station determines a pilot frequency position number according to a stored pilot frequency position number formula, determines an RE number corresponding to the pilot frequency position number according to the mapping relation between the stored position number and the RE number of a resource block in each symbol, and sends a pilot frequency signal at a position corresponding to the determined RE number; when the number of the current service terminals is less than Q, determining a control signal position number according to a stored first control signal position number formula, determining an RE number corresponding to the control signal position number according to a mapping relation between the stored position number and the RE number in each symbol, and sending a control signal at a position corresponding to the determined RE number; informing the terminal to determine the position of the control signal by using a stored first control signal position numbering formula at present; when the number of the current service terminals is not less than Q, determining a position number of the control signal according to a stored second control signal position number formula, determining an RE number corresponding to the position number of the control signal according to a mapping relation between the stored position number and the RE number in each symbol, and sending the control signal at the position corresponding to the determined RE number; informing the terminal to determine the position of the control signal by using a stored second control signal position numbering formula; transmitting a data signal on an RE other than the transmission control signal and the pilot signal; wherein Q is an integer;
the terminal determines a pilot frequency position number according to a stored pilot frequency position number formula, determines an RE number corresponding to the pilot frequency position number according to the mapping relation between the stored position number and the RE number in each symbol, and acquires a pilot frequency signal at a position corresponding to the determined RE number; when receiving a notification sent by a base station that the position of a control signal is determined by using a stored first control signal position numbering formula currently, determining the position number of the control signal according to the stored first control signal position numbering formula, determining an RE number corresponding to the position number of the control signal according to the mapping relation between the stored position number and the RE number in each symbol, and acquiring the control signal at the position corresponding to the determined RE number; when receiving a notification sent by a base station that the position of a control signal is determined by using a stored second control signal position numbering formula currently, determining the position number of the control signal according to the stored second control signal position numbering formula, determining an RE number corresponding to the position number of the control signal according to the mapping relation between the stored position number and the RE number in each symbol, and acquiring the control signal at the position corresponding to the determined RE number;
wherein the content of the first and second substances,
the pilot frequency position numbering formula is a 6m +3 p-2; wherein m is 0,1,2, …, N/6-1;
the position numbering formula of the first control signal is b-6 s +3 p-7;
the second control signal position numbering formula is b-6 s +3p-7,6s +3p-1, wherein s-1, 3, 5., N/6-1;
wherein, N is the number of RE in each symbol; p is the number of supported antenna ports.
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