CN110708756A - Resource allocation method and equipment based on channel power - Google Patents

Resource allocation method and equipment based on channel power Download PDF

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Publication number
CN110708756A
CN110708756A CN201810745833.9A CN201810745833A CN110708756A CN 110708756 A CN110708756 A CN 110708756A CN 201810745833 A CN201810745833 A CN 201810745833A CN 110708756 A CN110708756 A CN 110708756A
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power
maximum power
cell
reference signal
symbol
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CN110708756B (en
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栗婵媛
鲜柯
王亮
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Chengdu Dingqiao Communication Technology Co Ltd
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Chengdu Dingqiao Communication Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
    • 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
    • H04L5/0058—Allocation criteria
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Abstract

The embodiment of the invention provides a resource allocation method and equipment based on channel power, wherein the method comprises the following steps: determining the power of a cell corresponding to each type of transmission mode according to the corresponding relation between the type of the transmission mode and a preset power acquisition rule; different types of transmission modes correspond to different preset power acquisition rules; determining the maximum power as the required maximum power of the cell in the power of the cell corresponding to each transmission mode; if the required maximum power is larger than the preset theoretical maximum power of the cell, determining the available maximum power of the cell as the theoretical maximum power of the cell; and determining the power of a reference signal according to a target preset power acquisition rule corresponding to the theoretical maximum power and the required maximum power of the cell, wherein the power of the reference signal is used for distributing the power of a downlink channel. The method provided by the embodiment can improve the throughput rate of the cell.

Description

Resource allocation method and equipment based on channel power
Technical Field
The present invention relates to communications technologies, and in particular, to a resource allocation method and device based on channel power.
Background
In a Long Term Evolution (LTE) system, after a terminal enters a cell, a base station allocates power of a corresponding downlink channel to the terminal. Here, the power of the downlink channel is set with respect to a Reference Signal (RS), and is generally set according to an offset of the power of the reference signal.
In the prior art, since the positions of downlink common channels such as Primary Synchronization Channel (PSCH or PSCH), Secondary Synchronization Channel (SSCH), and Physical Broadcast Channel (PBCH) are fixed, when performing power allocation, the power of the downlink common channels is allocated first, and the power of the Synchronization channels (PSCH and SSCH) is generally configured to be offset to RS power by 0, that is, the transmission power of the Synchronization signal is the same as the transmission power of the reference signal. When the data service of the terminal needs to allocate resources, the base station allocates the resources according to the situation of the residual power.
However, when resource allocation is performed, if the power allocated to the downlink common channel is high, the data channel for transmitting the data traffic cannot be scheduled because the power is not allocated, and finally, the cell throughput is reduced.
Disclosure of Invention
The embodiment of the invention provides a resource allocation method and equipment based on channel power, which aim to overcome the defect that when resource allocation is carried out, if the allocated power of a downlink common channel is higher, a data channel for transmitting data service cannot be scheduled due to the fact that the power cannot be allocated, and finally the throughput of a cell is reduced.
In a first aspect, an embodiment of the present invention provides a resource allocation method based on channel power, including:
determining the power of a cell corresponding to each type of transmission mode according to the corresponding relation between the type of the transmission mode and a preset power acquisition rule; wherein, different types of transmission modes correspond to different preset power acquisition rules;
determining the maximum power as the required maximum power of the cell in the power of the cell corresponding to each transmission mode;
if the required maximum power is larger than the preset theoretical maximum power of the cell, determining the available maximum power of the cell as the theoretical maximum power of the cell;
and determining the power of a reference signal according to a target preset power acquisition rule corresponding to the theoretical maximum power of the cell and the required maximum power, wherein the power of the reference signal is used for distributing the power of a downlink channel.
In one possible design, the type of transmission mode includes at least one of:
carrying transmission of an Orthogonal Frequency Division Multiplexing (OFDM) symbol of a Physical Downlink Shared Channel (PDSCH), wherein the OFDM symbol does not carry a reference signal;
carrying transmission of OFDM symbols of PDSCH, wherein the OFDM symbols carry reference signals;
carrying transmission of OFDM symbols of channels other than PDSCH, wherein the OFDM symbols do not carry reference signals;
the transmission of OFDM symbols carrying channels other than PDSCH and the OFDM symbols carrying reference signals.
In one possible design, each of the predetermined power obtaining rules is a predetermined power obtaining function; the determining the power of the reference signal according to the theoretical maximum power of the cell and the target preset power obtaining rule corresponding to the required maximum power comprises the following steps:
obtaining the power of a target symbol according to a target preset power obtaining function corresponding to the theoretical maximum power and the required maximum power, wherein the power of the target symbol is an independent variable of the target preset power obtaining function, and the theoretical maximum power is a dependent variable of the target preset power obtaining function;
and determining the power of the reference signal according to the power of the target symbol.
In one possible design, the power of the target symbol is specifically any one of:
power of a reference signal, power of an orthogonal frequency division multiplexing, OFDM, symbol carrying a reference signal, power of an OFDM symbol without a reference signal.
In one possible design, the method further includes:
and if the required maximum power is smaller than the preset theoretical maximum power of the cell, determining the power of the reference signal according to the required maximum power and a target preset power acquisition rule corresponding to the required maximum power.
In a second aspect, an embodiment of the present invention provides a resource allocation device based on channel power, including:
the preset power acquisition module is used for determining the power of the cell corresponding to each type of transmission mode according to the corresponding relation between the type of the transmission mode and the preset power acquisition rule; wherein, different types of transmission modes correspond to different preset power acquisition rules;
a maximum power demand obtaining module, configured to determine, among powers of cells corresponding to the transmission modes, a maximum power as a maximum power demand of the cell;
an available maximum power determining module, configured to determine, when the required maximum power is greater than a preset theoretical maximum power of the cell, an available maximum power of the cell as the theoretical maximum power of the cell;
and the reference signal power determining module is used for determining the power of a reference signal according to a target preset power obtaining rule corresponding to the theoretical maximum power of the cell and the required maximum power, wherein the power of the reference signal is used for distributing the power of a downlink channel.
In one possible design, the type of transmission mode includes at least one of:
carrying transmission of an Orthogonal Frequency Division Multiplexing (OFDM) symbol of a Physical Downlink Shared Channel (PDSCH), wherein the OFDM symbol does not carry a reference signal;
carrying transmission of OFDM symbols of PDSCH, wherein the OFDM symbols carry reference signals;
carrying transmission of OFDM symbols of channels other than PDSCH, wherein the OFDM symbols do not carry reference signals;
the transmission of OFDM symbols carrying channels other than PDSCH and the OFDM symbols carrying reference signals.
In one possible design, each of the predetermined power obtaining rules is a predetermined power obtaining function; the reference signal power determination module is specifically configured to:
obtaining the power of a target symbol according to a target preset power obtaining function corresponding to the theoretical maximum power and the required maximum power, wherein the power of the target symbol is an independent variable of the target preset power obtaining function, and the theoretical maximum power is a dependent variable of the target preset power obtaining function;
in one possible design, the power of the target symbol is specifically any one of:
power of a reference signal, power of an orthogonal frequency division multiplexing, OFDM, symbol carrying a reference signal, power of an OFDM symbol without a reference signal.
In a possible design, the reference signal power determining module is further configured to determine the power of the reference signal according to the required maximum power and a target preset power obtaining rule corresponding to the required maximum power if the required maximum power is smaller than a preset theoretical maximum power of the cell.
In a third aspect, an embodiment of the present invention provides a resource allocation device based on channel power, including:
a memory for storing a program;
a processor for executing the program stored by the memory, the processor being adapted to perform the method as described above in the first aspect and any one of the various possible designs of the first aspect when the program is executed.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, including instructions, which, when executed on a computer, cause the computer to perform the method as described above in the first aspect and any one of various possible designs of the first aspect.
In the method and the device for resource allocation based on channel power provided by this embodiment, the power of a cell corresponding to each type of transmission mode is determined according to the corresponding relationship between the type of the transmission mode and a preset power acquisition rule; wherein, different types of transmission modes correspond to different preset power acquisition rules; determining the maximum power as the required maximum power of the cell in the power of the cell corresponding to each transmission mode; if the required maximum power is larger than the preset theoretical maximum power of the cell, determining the available maximum power of the cell as the theoretical maximum power of the cell; and determining the power of a reference signal according to a target preset power acquisition rule corresponding to the theoretical maximum power of the cell and the required maximum power, wherein the power of the reference signal is used for distributing the power of a downlink channel. In the embodiment, the influence of other downlink channel powers on the service channel resource allocation is considered when the cell maximum power is calculated based on the reference signal, so that the cell resource allocation is optimized, the cell throughput is improved, the available maximum power is ensured to be within the cell bearable range, the product aging is prevented from being accelerated under the condition of overpower for a long time, and the fault rate is prevented from being increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic grid diagram of a resource block according to an embodiment of the present invention;
fig. 2 is a block diagram of a communication system according to an embodiment of the present invention;
fig. 3 is a first flowchart of a resource allocation method based on channel power according to an embodiment of the present invention;
fig. 4 is a second flowchart of a resource allocation method based on channel power according to an embodiment of the present invention;
fig. 5 is a first schematic structural diagram of a resource allocation device based on channel power according to an embodiment of the present invention;
fig. 6 is a schematic hardware structure diagram of a resource allocation device based on channel power according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
First, the terms related to the present invention are explained with reference to fig. 1, and fig. 1 is a schematic grid diagram of a resource block according to an embodiment of the present invention.
Resource Blocks (RBs), one Resource Block occupies one slot in time domain, and is composed of Nsymbol Orthogonal Frequency Division Multiplexing (OFDM) symbols which are consecutive in time domain, where Nsymbol is 7 (as shown in fig. 1) for a normal cyclic prefix and Nsymbol is 6 for an extended cyclic prefix. And includes 12 subcarriers in the frequency domain. The time domain representation of one OFDM symbol is the result of one sampling in the time domain, and one OFDM symbol occupies all subcarriers in the system bandwidth when viewed in the frequency domain.
Resource Element (RE) is the most basic Resource unit in a Resource block, i.e., each cell in fig. 1 represents a Resource Element.
Reference Signal (RS) is a known Signal that a transmitting end provides to a receiving end for channel estimation or channel sounding. As shown in fig. 1, the shaded REs carry reference signals.
The RS power is the power per RE where the reference signal is located, and the reference signal power is usually used as a reference for allocating the downlink channel power, that is, the downlink channel power is usually set as an offset with respect to the reference signal.
Type A symbol: refers to an OFDM symbol that does not carry RS; type B symbol: refers to an OFDM symbol carrying RS; when the class a symbol and the class B symbol are used for transmitting a Physical Downlink Shared Channel (PDSCH or PDSCH), the mode of calculating the class a symbol power and the class B symbol power is as follows.
The A-type symbol power is obtained by the following formula I:
pdsch _ RE _ TypeA ═ rs (dbm) + pa (db) formula one
The B-type symbol power is obtained by the following formula two:
Pdsch_RE_TypeB＝Pdsch_RE_TypeA(dbm)×ρB/ρAformula two
Wherein, Pdsch _ RE _ TypeA represents the A-type symbol power, Pdsch _ RE _ TypeB represents the B-type symbol power, and RS represents the reference signal power;
PA＝ρA，ρArepresents the ratio of PDSCH RE power to RS RE power on the OFDM symbol without pilot frequency, and has the value range of [3, 2, 1, 0, -1.77, -3, -4.77, -6]dB。
ρB/ρAHas a corresponding relation with the value of PB, PB represents the signal power ratio of the antenna port, wherein rhoBRepresents the ratio of PDSCH RE power over pilot OFDM symbols relative to RS RE power.
Value of PB and ρB/ρAThe correspondence of the ratios can be represented by table 1:
TABLE 1
From the above table, it can be found that when the antenna port PB is 1, Pdsch _ RE _ type b is Pdsch _ RE _ type a (dbm)
Fig. 2 is a block diagram of a communication system according to an embodiment of the present invention. As shown in fig. 2, the communication system includes: network equipment and a terminal. The communication system may be an LTE communication system, or may be other future communication systems, such as a 5G communication system, and the like, which is not limited herein.
A network device: may be a device that accesses a terminal to a wireless network. The device may be a base station or various wireless access points or may refer to a device in an access network that communicates over the air-interface, through one or more sectors, with the terminals. The base station may be configured to interconvert received air frames and IP packets as a router between the terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate management of attributes for the air interface. For example, the base Station may be a Base Transceiver Station (BTS) in Global System for mobile communications (GSM) or Code Division Multiple Access (CDMA), a base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNB, eNodeB) in Long Term Evolution (Long Term Evolution, LTE), a relay Station or an Access point, or a base Station gNB in a future 5G network, and the like, which are not limited herein.
A terminal: which may be wireless or wireline, and which may be a device providing voice and/or other traffic data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a radio access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. The wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), a User Equipment (User Device or User Equipment), and a sensor having a network Access function, which is not limited herein.
The invention provides a resource allocation method based on channel power based on the problem of cell power allocation, which can realize that each resource particle of transmission data can be allocated with power, thereby improving the cell throughput. The following is a detailed description with reference to specific examples.
Fig. 3 is a first flowchart of a resource allocation method based on channel power according to an embodiment of the present invention;
s301, determining the power of a cell corresponding to each type of transmission mode according to the corresponding relation between the type of the transmission mode and a preset power acquisition rule; wherein, different types of transmission modes correspond to different preset power obtaining rules.
The present embodiment may provide a plurality of types of transmission modes, and the types of transmission modes are divided according to different symbols transmitted by a downlink channel. At a moment, the network device and the terminal adopt a transmission mode for transmission. The types of transmission modes may be, for example: the transmission of an OFDM symbol carrying a Physical Downlink Shared Channel (PDSCH) (no reference signal is carried on the OFDM symbol), the transmission of an OFDM symbol carrying a PDSCH (no reference signal is carried on the OFDM symbol), the transmission of an OFDM symbol carrying a channel other than the PDSCH (no reference signal is carried on the OFDM symbol), and the transmission of an OFDM symbol carrying a channel other than the PDSCH (reference signal is carried on the OFDM symbol).
The Channel other than the PDSCH may be, for example, a Physical downlink shared Channel (PBCH), a Paging Channel (PCH), a Synchronization Channel (SCH), or the like.
The preset power obtaining rule is a rule for obtaining the required power of the current cell. Different transmission modes correspond to different preset power acquisition rules. The preset power acquisition rule may be, for example, a function, assign a weight, and the like. The embodiment does not particularly limit the implementation manner of the preset power obtaining rule.
When resource allocation is needed, respective corresponding power values are calculated according to the preset power acquisition rules corresponding to the enumerated modes so as to be compared in the following process, and therefore the power requirements of the resource particles under different transmission modes corresponding to the data transmission at different moments are met.
And S302, determining the maximum power as the required maximum power of the cell in the power of the cell corresponding to each transmission mode.
Wherein the required maximum power is a power value of a cell which guarantees that each RE transmitting data in the cell can be allocated to power.
The above listed transmission modes correspond to different preset power obtaining rules, and in the transmission process, the transmission modes are not fixed, and in order to ensure that REs can be allocated to power in each transmission mode, in this embodiment, the powers of the cells corresponding to the various transmission modes are sorted from small to large, and in these powers, the maximum power is determined as the maximum power required by the cell. Thereby, it can be guaranteed that each RE can be allocated power in all transmission modes.
And S303, if the required maximum power is larger than the preset theoretical maximum power of the cell, determining the available maximum power of the cell as the theoretical maximum power of the cell.
The preset theoretical maximum power of the cell is the maximum power which can be theoretically borne by the cell after the cell is set, and the distributed power should not exceed the preset theoretical maximum power of the cell when resource allocation is carried out.
The available maximum power of the cell is the maximum power value actually adopted when resource allocation is carried out, and the condition that the available maximum power should meet is to ensure that each RE in the cell can be allocated with power and is within the power range which can be borne by the cell.
If the calculated required maximum power is larger than the preset cell theoretical maximum power, the cell can work in an overload mode, product aging is accelerated, and the failure rate is increased. Therefore, when the available maximum power of the cell is determined to be the theoretical maximum power of the cell, namely the actual resource allocation is carried out, the theoretical maximum power of the cell is adopted, so that the increase of the product failure rate is avoided.
S304, determining the power of a reference signal according to a target preset power obtaining rule corresponding to the theoretical maximum power of the cell and the required maximum power, wherein the power of the reference signal is used for distributing the power of a downlink channel.
When the required maximum power of the cell is calculated, selecting the maximum value calculated by the preset power acquisition rule corresponding to the transmission mode, wherein the required maximum power of the cell is the maximum value in the power corresponding to the transmission mode, and the preset power acquisition rule corresponding to the maximum power of the transmission mode is called a target preset power acquisition rule.
However, since the required maximum power is greater than the preset theoretical maximum power of the cell, that is, if the theoretical maximum power is used to allocate power, there is a risk that REs cannot be allocated to power, in order to enable each RE to be able to allocate power, a reverse derivation needs to be performed at this time to ensure that each RE in the cell can be allocated to power, and the available maximum power is within a power range that the cell can bear.
The reverse derivation does not directly adopt the theoretical maximum power to directly distribute the power, but reversely deducts the power of the RS based on the target preset power acquisition rule corresponding to the required maximum power and the theoretical maximum power, namely, the corresponding relation between the theoretical maximum power and the target preset power acquisition rule is established, so that the power of the reversely deduced RS is solved.
The optimal power of the reference signal is obtained according to the reverse derivation, and then the power of the downlink channel is allocated according to the power of the reference signal, and the specific allocation manner is not described herein again.
And if the required maximum power is smaller than the preset theoretical maximum power of the cell, determining the power of the reference signal according to the required maximum power and a target preset power acquisition rule corresponding to the required maximum power. Namely, the required maximum power can be met, and then the target preset power acquisition rule corresponding to the required maximum power is directly used for power distribution.
According to the resource allocation method based on the channel power, the power of a cell corresponding to each type of transmission mode is determined according to the corresponding relation between the type of the transmission mode and a preset power acquisition rule; wherein, different types of transmission modes correspond to different preset power acquisition rules; determining the maximum power as the required maximum power of the cell in the power of the cell corresponding to each transmission mode; if the required maximum power is larger than the preset theoretical maximum power of the cell, determining the available maximum power of the cell as the theoretical maximum power of the cell; the method comprises the steps of determining the power of a reference signal according to a target preset power acquisition rule corresponding to the theoretical maximum power and the required maximum power of a cell, so that the power of the reference signal can be reduced in a self-adaptive manner, when the power of a downlink channel is distributed through the reference signal, each RE in the cell is guaranteed to be capable of being distributed with power, the throughput of the cell is improved, the available maximum power is guaranteed to be within a cell bearing range, product aging is prevented from being accelerated under the condition of overpower for a long time, and the fault rate is prevented from being increased.
Fig. 4 is a second flowchart of a resource allocation method based on channel power according to an embodiment of the present invention, as shown in fig. 4, the method includes:
s401, determining the power of a cell corresponding to each type of transmission mode according to the corresponding relation between the type of the transmission mode and a preset power acquisition function; wherein, different transmission modes correspond to different preset power acquisition functions;
in this embodiment, there are multiple transmission mode types, where a specific transmission mode type is divided according to different symbols transmitted by a downlink channel, and different transmission modes correspond to different preset power acquisition rules. For example, the preset power obtaining rule may be a preset power obtaining function, that is, the power corresponding to each transmission mode is obtained through a different function. In this embodiment, the following transmission modes are taken as examples of how to obtain the power of each transmission mode.
One transmission mode is the transmission of OFDM symbols carrying PDSCH (no reference signal is carried on the OFDM symbols), and the power in this transmission mode is called: the power of a type a symbol (without other downlink channels), referred to as Pmax _ type a for short, is obtained by the following formula three:
pmax _ TypeA is the maximum RB number under bandwidth × Pdsch _ RE _ TypeA × number of subcarriers included in each RB frequency domain, formula three
Another transmission mode is transmission of OFDM symbols carrying PDSCH (the OFDM symbols carry reference signals), and the power in this transmission mode is called: the power of the type B symbol (without other downlink channels), referred to as Pmax _ type B for short, is obtained by the following formula four:
pmax _ TypeB ═ maximum number of RBs in bandwidth × (Pdsch _ RE _ TypeB × (number of subcarriers per RB frequency domain-number of reference signals per RB on one symbol) + RS × number of reference signals per RB on one symbol) equation four
Yet another transmission mode is the transmission of OFDM symbols carrying channels other than PDSCH (no reference signal is carried on the OFDM symbol), and the power in this transmission mode is called: the power of a type a symbol (containing other downlink channels), referred to as Pmax _ type a _ others for short, is obtained by the following formula five:
pmax _ TypeA _ others (maximum RB number under bandwidth-RB number occupied by other downlink channels) × Pdsch _ RE _ TypeA × number of subcarriers contained in frequency domain per RB + power of other channels formula five
Another transmission mode is the transmission of OFDM symbols carrying channels other than PDSCH (on which reference signals are carried), with the power in this transmission mode being called: the power of the class B symbol (containing other downlink channels), referred to as Pmax _ type B _ others for short, is obtained by the following formula six:
pmax _ type _ other (maximum RB number under bandwidth-RB number occupied by other downlink channels) × (Pdsch _ RE _ type b × (number of subcarriers contained in each RB frequency domain-number of reference signals per RB on one symbol) + RS × number of reference signals per RB on one symbol) + other channel power
Formula six
Wherein, in the above formulas three to six, the maximum number of RBs involved represents the maximum number of RBs under the current cell bandwidth; the number of subcarriers contained in each RB frequency domain is generally 12; the number of reference signals per RB on one symbol indicates the number of RSs carried on one OFDM symbol within each RB.
The other channel power refers to power of a channel other than the PDSCH, and may be, for example, power of PBCH, power of PCH, power of SCH, or the like.
Through the above calculation formula, the power of the cell corresponding to each type of transmission mode can be obtained.
S402, determining the maximum power as the required maximum power of the cell in the power of the cell corresponding to each transmission mode;
in order to ensure that each RE for transmitting data in the cell can be allocated with power, the maximum value of the determined powers of the transmission modes is selected as the required maximum power of the cell.
Specifically, the maximum power required by the cell may be obtained by the following formula seven:
pmax _ Cell ═ MAX { Pmax _ TypeA, Pmax _ TypeB, Pmax _ TypeA _ others, Pmax _ TypeB _ others } formula seven
Where Pmax _ Cell is the required maximum power of the Cell.
S403, if the required maximum power is larger than the preset theoretical maximum power of the cell, determining the available maximum power of the cell as the theoretical maximum power of the cell;
specifically, the available maximum power of the cell may be obtained by the following formula eight:
pmax _ Cell ═ Min { Pmax _ Cell, Power } formula eight
Wherein Pmax _ Cell represents the maximum Power available for the Cell, Power represents the theoretical maximum Power of the Cell, and when the required maximum Power of the Cell is greater than the preset theoretical maximum Power of the Cell, the situation that the Power cannot be met exists, so the required maximum Power cannot be used, but the maximum Power available for the Cell is determined to be the theoretical maximum Power of the Cell.
S404, obtaining the power of a target symbol according to a target preset power obtaining function corresponding to the theoretical maximum power and the required maximum power, wherein the power of the target symbol is an independent variable of the target preset power obtaining function, and the theoretical maximum power is a dependent variable of the target preset power obtaining function;
s405, determining the power of the reference signal according to the power of the target symbol.
In a specific implementation process, when the required maximum power is obtained through calculation, the required maximum power may be obtained through a target preset power obtaining function, however, when the required maximum power is greater than the theoretical maximum power, the theoretical maximum power and the target preset power obtaining function are required to be used for back-deriving the power of the target symbol.
In the reverse deduction process, the power of the target symbol is an independent variable of the target preset power obtaining function, and the theoretical maximum power is a dependent variable of the target preset power obtaining function.
As can be seen from the above formulas three to six, the power of the target symbol is the power of the reference signal, the power of the OFDM symbol carrying the reference signal, the power of the OFDM symbol not carrying the reference signal, that is, the power of the reference signal, the power of the class a symbol, and the power of the class B symbol.
For example, for formula three, in the back-stepping process, the theoretical maximum power is used as a dependent variable, the power of the a-type symbol (without other downlink channels) can be deduced, and the power of the RS can be obtained according to the power of the a-type symbol (without other downlink channels) and the formula one;
aiming at the fourth formula, in the reverse deduction process, the theoretical maximum power is used as a dependent variable, the power of the B-type symbol (without other downlink channels) can be deduced, and the power of the RS can be obtained according to the power of the B-type symbol (without other downlink channels) and the first and second formulas;
aiming at the fifth formula, in the reverse deduction process, the theoretical maximum power is used as a dependent variable, the power of the A-type symbol (containing other downlink channels) can be deduced, and the power of the RS can be obtained according to the power of the A-type symbol (containing other downlink channels) and the first formula;
aiming at the sixth formula, in the reverse deduction process, the theoretical maximum power is used as a dependent variable, the power of the B-type symbol (containing other downlink channels) can be deduced, and the power of the RS can be obtained according to the power of the B-type symbol (containing other downlink channels) and the first and second formulas;
a detailed description is given below with a specific example.
In this example, the other downlink channels select the synchronization channel, where PB is 1, PA is-3, the offset of the synchronization channel power with respect to the RS power is configured to be 0, the offset of the channel power other than the synchronization channel in the other downlink channels with respect to the RS power is-3, and the antenna is a 2-port.
In this example, PB is 1, and as can be seen from formula one and formula two, the symbol power of class a and the symbol power of class B are the same.
The RS power is larger than and doubled than the A-type symbol power, the bias of the synchronous channel power relative to the RS power is 0, the synchronous channel power is larger than the A-type symbol power, the bias of the channel power except the synchronous channel in other downlink channels relative to the RS power is-3, and the channel power except the synchronous channel in other downlink channels is equal to the A-type symbol power.
A Synchronization Signal (SS) period is 5ms, and is divided into a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSs), in a Time Division Duplex (TDD) structure, the PSS is located in a third symbol of a Downlink Pilot TimeSlot (DwPTS), and occupies 62 subcarriers (6 RBs) in a frequency domain, the SSs is located in a last symbol of a first subframe of the Synchronization Signal period and occupies 62 subcarriers (6 RBs) in the frequency domain, so that the Synchronization signals are all located on a class a symbol, and no Synchronization Signal is carried on a class B symbol, so that an embodiment of the present invention has three transmission modes, and power corresponding to each transmission mode is specifically calculated as follows:
the power of the class a symbol (without sync channel) is obtained by formula three, and the specific substitution of the setting value in this example is the maximum RB number under Pmax _ TypeA ═ bandwidth × Pdsch _ RE _ TypeA × 12
The power of the type B symbol (without sync channel) is specifically substituted into the present exemplary setting by the formula four, Pmax _ type B (Pmax _ type B _ others) (maximum RB number under bandwidth x (Pdsch _ RE _ type B × 8+ RS × 2)
The power of the class a symbol (containing the synchronization channel) is obtained by equation six, specifically substituting the present exemplary setting value Pmax _ TypeA _ others (maximum RB number under bandwidth-6) × Pdsch _ RE _ TypeA × 12+ Psch × 62
Since the class a symbol power and the class B symbol power are the same, and the RS power is twice as high as the class a symbol power, Pmax _ TypeB is Pmax _ TypeB _ others, which is the maximum RB number under bandwidth x ((Pdsch _ RE _ TypeB × 8+ RS × 2) — the maximum RB number under bandwidth x ((Pdsch _ RE _ TypeA × 8+ Pdsch _ RE _ TypeA × 2 × 2) — (Pdsch _ RE _ TypeA × 12) — the maximum RB number under bandwidth x ((Pdsch _ RE _ TypeA × 12) — Pmax _ TypeA ═ TypeA
The calculation of the assumed conditions shows that: pmax _ TypeA _ others > Pmax _ TypeB ═ Pmax _ TypeA
Therefore, the maximum required power Pmax _ Cell ═ Pmax _ TypeA _ others can be obtained by the formula seven, and the maximum value of the power corresponding to each transmission mode is selected as the maximum required power, so that each RE can be guaranteed to be allocated with the power. If the influence of the synchronization channel power on the channel resource allocation is not considered, some REs are inevitably not allocated with power on the class a symbol of the synchronization channel in the present example, thereby causing the cell throughput to be reduced.
According to the resource allocation method based on the channel power, the power of a cell corresponding to each type of transmission mode is determined according to the corresponding relation between the type of the transmission mode and a preset power acquisition rule; wherein, different types of transmission modes correspond to different preset power acquisition rules; determining the maximum power as the required maximum power of the cell in the power of the cell corresponding to each transmission mode; if the required maximum power is larger than the preset theoretical maximum power of the cell, determining the available maximum power of the cell as the theoretical maximum power of the cell; obtaining the power of a target symbol according to a target preset power obtaining function corresponding to the theoretical maximum power and the required maximum power, wherein the power of the target symbol is an independent variable of the target preset power obtaining function, and the required maximum power is a dependent variable of the target preset power obtaining function; and determining the power of the reference signal according to the power of the target symbol. And then, the power of a downlink channel is distributed according to the power of the reference signal, so that each RE for transmitting data can be distributed with power, and the throughput of the cell is improved.
Fig. 5 is a schematic structural diagram of a resource allocation device based on channel power according to an embodiment of the present invention, as shown in fig. 5, the resource allocation device 50 based on channel power includes: a preset power acquisition module 501, a required maximum power acquisition module 502, an available maximum power determination module 503, and a reference signal power determination module 504.
A preset power obtaining module 501, configured to determine, according to a correspondence between types of transmission modes and preset power obtaining rules, power of a cell corresponding to each type of transmission mode; wherein, different types of transmission modes correspond to different preset power acquisition rules;
a maximum power demand obtaining module 502, configured to determine, among the powers of the cells corresponding to the transmission modes, a maximum power as a maximum power demand of the cell;
an available maximum power determining module 503, configured to determine, when the required maximum power is greater than a preset theoretical maximum power of the cell, the available maximum power of the cell as the theoretical maximum power of the cell;
a reference signal power determining module 504, configured to determine power of a reference signal according to a target preset power obtaining rule corresponding to the theoretical maximum power of the cell and the required maximum power, where the power of the reference signal is used to allocate power of a downlink channel.
In one possible design, the type of the transmission mode includes at least one of the following types:
carrying transmission of an Orthogonal Frequency Division Multiplexing (OFDM) symbol of a Physical Downlink Shared Channel (PDSCH), wherein the OFDM symbol does not carry a reference signal;
carrying transmission of OFDM symbols of PDSCH, wherein the OFDM symbols carry reference signals;
carrying transmission of OFDM symbols of channels other than PDSCH, wherein the OFDM symbols do not carry reference signals;
the transmission of OFDM symbols carrying channels other than PDSCH and the OFDM symbols carrying reference signals.
In one possible design, each of the predetermined power obtaining rules is a predetermined power obtaining function; the reference signal power determination module 504 is specifically configured to:
obtaining the power of a target symbol according to a target preset power obtaining function corresponding to the theoretical maximum power and the required maximum power, wherein the power of the target symbol is an independent variable of the target preset power obtaining function, and the theoretical maximum power is a dependent variable of the target preset power obtaining function;
in one possible design, the power of the target symbol is specifically any one of:
power of a reference signal, power of an orthogonal frequency division multiplexing, OFDM, symbol carrying a reference signal, power of an OFDM symbol without a reference signal.
In a possible design, the reference signal power determining module 504 is further configured to determine the power of the reference signal according to the required maximum power and a target preset power obtaining rule corresponding to the required maximum power if the required maximum power is smaller than a preset theoretical maximum power of the cell.
The apparatus provided in this embodiment may be used to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
Fig. 6 is a schematic diagram of a hardware structure of a resource allocation device based on channel power according to an embodiment of the present invention, and as shown in fig. 6, a resource allocation device 60 based on channel power according to this embodiment includes: a processor 601 and a memory 602; wherein
A memory 602 for storing computer-executable instructions;
the processor 601 is configured to execute the computer-executable instructions stored in the memory to implement the steps performed by the receiving device in the above embodiments. Reference may be made in particular to the description relating to the method embodiments described above.
Alternatively, the memory 602 may be separate or integrated with the processor 601.
When the memory 602 is provided separately, the voice interactive apparatus further includes a bus 1703 for connecting the memory 1702 and the processor 1701.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer execution instruction is stored in the computer-readable storage medium, and when a processor executes the computer execution instruction, the voice interaction method is implemented as above.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one unit. The unit formed by the modules can be realized in a hardware form, and can also be realized in a form of hardware and a software functional unit.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present application.
It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the storage medium may reside as discrete components in an electronic device or host device.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (12)

1. A method for resource allocation based on channel power, comprising:
determining the power of a cell corresponding to each type of transmission mode according to the corresponding relation between the type of the transmission mode and a preset power acquisition rule; wherein, different types of transmission modes correspond to different preset power acquisition rules;
determining the maximum power as the required maximum power of the cell in the power of the cell corresponding to each transmission mode;
if the required maximum power is larger than the preset theoretical maximum power of the cell, determining the available maximum power of the cell as the theoretical maximum power of the cell;
and determining the power of a reference signal according to a target preset power acquisition rule corresponding to the theoretical maximum power of the cell and the required maximum power, wherein the power of the reference signal is used for distributing the power of a downlink channel.
2. The method of claim 1, wherein the type of the transmission mode comprises at least one of:
carrying transmission of an Orthogonal Frequency Division Multiplexing (OFDM) symbol of a Physical Downlink Shared Channel (PDSCH), wherein the OFDM symbol does not carry a reference signal;
carrying transmission of OFDM symbols of PDSCH, wherein the OFDM symbols carry reference signals;
carrying transmission of OFDM symbols of channels other than PDSCH, wherein the OFDM symbols do not carry reference signals;
the transmission of OFDM symbols carrying channels other than PDSCH and the OFDM symbols carrying reference signals.
3. The method of claim 1, wherein each of the predetermined power acquisition rules is a predetermined power acquisition function; the determining the power of the reference signal according to the theoretical maximum power of the cell and the target preset power obtaining rule corresponding to the required maximum power comprises the following steps:
obtaining the power of a target symbol according to a target preset power obtaining function corresponding to the theoretical maximum power and the required maximum power, wherein the power of the target symbol is an independent variable of the target preset power obtaining function, and the theoretical maximum power is a dependent variable of the target preset power obtaining function;
and determining the power of the reference signal according to the power of the target symbol.
4. The method according to claim 3, wherein the power of the target symbol is specifically any one of:
power of a reference signal, power of an orthogonal frequency division multiplexing, OFDM, symbol carrying a reference signal, power of an OFDM symbol without a reference signal.
5. The method according to any one of claims 1 to 4, further comprising:
and if the required maximum power is smaller than the preset theoretical maximum power of the cell, determining the power of the reference signal according to the required maximum power and a target preset power acquisition rule corresponding to the required maximum power.
6. A resource allocation apparatus based on channel power, comprising:
the preset power acquisition module is used for determining the power of the cell corresponding to each type of transmission mode according to the corresponding relation between the type of the transmission mode and the preset power acquisition rule; wherein, different types of transmission modes correspond to different preset power acquisition rules;
a maximum power demand obtaining module, configured to determine, among powers of cells corresponding to the transmission modes, a maximum power as a maximum power demand of the cell;
an available maximum power determining module, configured to determine, when the required maximum power is greater than a preset theoretical maximum power of the cell, an available maximum power of the cell as the theoretical maximum power of the cell;
and the reference signal power determining module is used for determining the power of a reference signal according to a target preset power obtaining rule corresponding to the theoretical maximum power of the cell and the required maximum power, wherein the power of the reference signal is used for distributing the power of a downlink channel.
7. The apparatus of claim 6, wherein the type of the transmission mode comprises at least one of:
carrying transmission of an Orthogonal Frequency Division Multiplexing (OFDM) symbol of a Physical Downlink Shared Channel (PDSCH), wherein the OFDM symbol does not carry a reference signal;
carrying transmission of OFDM symbols of PDSCH, wherein the OFDM symbols carry reference signals;
carrying transmission of OFDM symbols of channels other than PDSCH, wherein the OFDM symbols do not carry reference signals;
the transmission of OFDM symbols carrying channels other than PDSCH and the OFDM symbols carrying reference signals.
8. The apparatus of claim 6, wherein each of the predetermined power acquisition rules is a predetermined power acquisition function; the reference signal power determination module is specifically configured to:
and obtaining the power of a target symbol according to a target preset power obtaining function corresponding to the theoretical maximum power and the required maximum power, wherein the power of the target symbol is an independent variable of the target preset power obtaining function, and the theoretical maximum power is a dependent variable of the target preset power obtaining function.
9. The apparatus according to claim 8, wherein the power of the target symbol is specifically any one of:
power of a reference signal, power of an orthogonal frequency division multiplexing, OFDM, symbol carrying a reference signal, power of an OFDM symbol without a reference signal.
10. The device according to any one of claims 6 to 9, wherein the reference signal power determining module is further configured to determine the power of the reference signal according to the required maximum power and a target preset power obtaining rule corresponding to the required maximum power if the required maximum power is smaller than a preset theoretical maximum power of the cell.
11. A resource allocation apparatus based on channel power, comprising:
a memory for storing a program;
a processor for executing the program stored by the memory, the processor being configured to perform the method of any of claims 1 to 5 when the program is executed.
12. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 5.
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