CN113923687A - Modulation and coding strategy MCS value adjusting method and device - Google Patents
Modulation and coding strategy MCS value adjusting method and device Download PDFInfo
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- CN113923687A CN113923687A CN202010660607.8A CN202010660607A CN113923687A CN 113923687 A CN113923687 A CN 113923687A CN 202010660607 A CN202010660607 A CN 202010660607A CN 113923687 A CN113923687 A CN 113923687A
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Abstract
The embodiment of the invention provides a modulation and coding strategy MCS value adjusting method and a device. In the method, a base station acquires interference information of a system frame and a feedback result of downlink data sent by terminal equipment; the interference information of the system frame is used for indicating a first time slot in the system frame, and the first time slot is a time slot with adjacent cell reference signal interference; and the base station adjusts the MCS value of the downlink channel of the terminal equipment according to the interference information of the system frame and the feedback result of the downlink data. The base station can respectively adjust the MCS value of the downlink channel of the terminal equipment according to the time slot with the adjacent cell reference signal interference and the time slot without the adjacent cell reference signal interference, so that the MCS value of the downlink channel of the terminal equipment is prevented from being influenced by a certain interference time slot with the adjacent cell reference signal, and the whole transmission efficiency is improved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a modulation and coding strategy MCS value adjustment method and apparatus.
Background
With the continuous development of mobile communication systems and the rapid increase of user demands, mobile communication systems are required to have larger capacity, higher speed and more powerful features. In the prior art, the transmission efficiency of a mobile communication system can be measured by the spectral efficiency, and Adaptive Modulation and Coding (ACM) technology has a prominent advantage in improving the spectral efficiency.
In the existing AMC technology, a base station flexibly adjusts a Modulation and Coding Scheme (MCS) value according to a downlink channel quality and a downlink data feedback result returned by a terminal device, so as to ensure the transmission quality of a link, thereby achieving higher data throughput and spectral efficiency. For example, in a serving cell of a 5th-Generation (5G) mobile communication network, a base station periodically transmits a reference signal to a terminal device, and the terminal device may perform downlink channel measurement according to the received reference signal and send a measured measurement result to the base station. And simultaneously, the base station sends downlink data to the terminal equipment through a downlink channel, and the terminal equipment returns a feedback result of the downlink data to the base station.
When the base station determines to receive a Channel Quality Indicator (CQI) included in the measurement result, the base station adjusts an MCS value of a downlink Channel, where the MCS value may indicate a modulation scheme and a coding rate used by the downlink Channel.
And after receiving the feedback result of the downlink data, the base station adjusts the MCS value of the downlink channel according to the specific value of the feedback result. Wherein, if the feedback result of the downlink data received by the base station is Negative Acknowledgement (NACK), the MCS value is decreased by 3 points, and if the feedback result of the data received by the base station is Acknowledgement (ACK), the MCS value is increased by 1 point.
When the neighboring cell of the 5G serving cell also periodically transmits the reference signal for downlink channel measurement, the reference signal of the neighboring cell may interfere with the downlink channel of the cell, so that the feedback result that the terminal device in the serving cell receives the downlink data received through the downlink channel is affected, and further the MCS value of the downlink channel adjusted by the base station according to the feedback result is low, and finally the data transmission efficiency of the downlink channel is low.
Disclosure of Invention
The application provides a modulation and coding strategy MCS value adjusting method and device, which are used for accurately adjusting a downlink MCS value.
The embodiment of the invention provides the following specific technical scheme:
in a first aspect, an embodiment of the present application provides a modulation and coding strategy MCS value adjustment method, which specifically includes the following steps:
a base station acquires interference information of a system frame and a feedback result of downlink data sent by terminal equipment; the interference information of the system frame is used for indicating a first time slot in the system frame, and the first time slot is a time slot with adjacent cell reference signal interference;
and the base station adjusts the MCS value of the downlink channel of the terminal equipment according to the interference information of the system frame and the feedback result of the downlink data.
In a possible implementation manner, the acquiring, by the base station, interference information of the system frame includes:
the base station acquires resource configuration information of the reference signal of the adjacent cell;
the base station determines the first time slot in the system frame according to the resource configuration information of the adjacent cell reference signal;
and the base station determines the interference information of the system frame according to the position of the first time slot.
In a possible implementation manner, the adjusting, by the base station, the MCS value of the downlink channel of the terminal device according to the interference information of the system frame and the feedback result of the downlink data includes:
the base station determines a second time slot in the system frame according to the interference information of the system frame, wherein the second time slot is a time slot without the interference of the reference signal of the adjacent region; the base station adjusts the MCS value of the downlink channel of the terminal equipment in the second time slot in a first adjusting mode according to the feedback result of the downlink data; and/or the presence of a gas in the gas,
the base station determines the first time slot in the system frame according to the interference information of the system frame; and the base station adjusts the MCS value of the downlink channel of the terminal equipment in the first time slot in a second adjustment mode according to the feedback result of the downlink data.
In a possible implementation manner, the adjusting, by the base station, the MCS value in the second time slot by a first adjustment manner according to the feedback result of the downlink data includes:
if the base station determines that the feedback result of the downlink data is Acknowledgement (ACK) information, the MCS value is adjusted up to 0.1 in the second time slot; or
And if the base station determines that the feedback result of the downlink data is Negative Acknowledgement (NACK) information, the MCS value is adjusted down by 0.3 in the second time slot.
In a possible implementation manner, the adjusting, by the base station according to the feedback result of the downlink data and by a second adjustment manner, the MCS value in the first time slot includes:
if the base station determines that the feedback result of the downlink data is Acknowledgement (ACK) information, the MCS value is adjusted up to 0.1 in the first time slot; or
And if the base station determines that the feedback result of the downlink data is Negative Acknowledgement (NACK) information, the MCS value is adjusted down by 0.4 in the first time slot.
In one possible embodiment, the method further comprises:
the base station acquires a Channel Quality Indicator (CQI) of downlink data sent by the terminal equipment;
the base station calculates and obtains an initial MCS value of a downlink channel of the terminal equipment according to the CQI;
and the base station determines that the MCS value of the downlink channel of the terminal equipment is equal to the initial MCS value.
In a second aspect, an embodiment of the present application provides a base station, including:
an obtaining unit, configured to obtain interference information of a system frame and a feedback result of downlink data sent by the terminal device; the interference information of the system frame is used for indicating a first time slot in the system frame, and the first time slot is a time slot with adjacent cell reference signal interference;
and the processing unit is used for adjusting the MCS value of the downlink channel of the terminal equipment according to the interference information of the system frame and the feedback result of the downlink data.
In a possible implementation manner, the acquiring unit acquires the interference information of the system frame, including:
acquiring resource configuration information of the neighbor cell reference signal;
determining the first time slot in the system frame according to the resource configuration information of the adjacent cell reference signal;
and determining the interference information of the system frame according to the position of the first time slot.
In a possible implementation manner, the adjusting, by the processing unit, the MCS value of the downlink channel of the terminal device according to the interference information of the system frame and the feedback result of the downlink data includes:
determining a second time slot in the system frame according to the interference information of the system frame, wherein the second time slot is a time slot without the interference of the reference signal of the adjacent region; adjusting the MCS value of the downlink channel of the terminal equipment in the second time slot in a first adjusting mode according to the feedback result of the downlink data; and/or the presence of a gas in the gas,
determining the first time slot in the system frame according to the interference information of the system frame; and adjusting the MCS value of the downlink channel of the terminal equipment in the first time slot in a second adjusting mode according to the feedback result of the downlink data.
In a possible implementation manner, the adjusting, by the processing unit, the MCS value in the second time slot according to the feedback result of the downlink data by a first adjusting method includes:
if the feedback result of the downlink data is determined to be Acknowledgement (ACK) information, the MCS value is adjusted up to 0.1 in the second time slot; or
And if the feedback result of the downlink data is determined to be Negative Acknowledgement (NACK) information, adjusting the MCS value down by 0.3 in the second time slot.
In a possible implementation manner, the adjusting, by the processing unit, the MCS value in the first time slot according to the feedback result of the downlink data by a second adjustment method includes:
if the feedback result of the downlink data is determined to be Acknowledgement (ACK) information, the MCS value is adjusted up to 0.1 in the first time slot; or
And if the feedback result of the downlink data is determined to be Negative Acknowledgement (NACK) information, adjusting the MCS value down by 0.4 in the first time slot.
In a possible implementation, the processing unit is further configured to: acquiring a Channel Quality Indicator (CQI) of downlink data sent by the terminal equipment through the acquisition unit; calculating to obtain an initial MCS value of a downlink channel of the terminal equipment according to the CQI; and determining that the MCS value of the downlink channel of the terminal equipment is equal to the initial MCS value.
In a third aspect, an embodiment of the present application provides a computer-readable storage medium, including: the computer-readable storage medium has stored thereon a computer program which, when run on an electronic device, causes the electronic device to perform any one of the possible implementations of any of the above aspects.
In a fourth aspect, embodiments of the present application provide a computer program comprising instructions that, when executed on a computer, cause the computer to perform any one of the possible implementations of any one of the above aspects.
In a fifth aspect, the present application provides a chip, where the chip is configured to read a computer program stored in a memory, and perform any one of the possible implementations of the foregoing aspects.
In the technical scheme of the embodiment of the application, a base station acquires interference information of a system frame and a feedback result of downlink data sent by terminal equipment; the interference information of the system frame is used for indicating a first time slot in the system frame, and the first time slot is a time slot with adjacent cell reference signal interference; and the base station adjusts the MCS value of the downlink channel of the terminal equipment according to the interference information of the system frame and the feedback result of the downlink data. The base station can respectively adjust the MCS value of the downlink channel of the terminal equipment according to the time slot with the adjacent cell reference signal interference and the time slot without the adjacent cell reference signal interference, so that the MCS value of the downlink channel of the terminal equipment can be prevented from being influenced by a certain interference time slot, and the overall transmission efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a communication system provided in an embodiment of the present invention;
fig. 2 is a schematic flow chart of an MCS value adjustment method according to an embodiment of the present invention;
fig. 3 is a flowchart of acquiring resource configuration information of a reference signal in a neighboring cell according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating an example of a method for adjusting MCS values according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an apparatus of a base station according to an embodiment of the present invention;
fig. 6 is a schematic device diagram of a base station according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. 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 application.
The embodiment of the application provides an MCS value adjusting method, which is used for accurately adjusting a downlink MCS value.
The method and the device are based on the same inventive concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.
In the technical scheme of the embodiment of the application, a base station acquires interference information of a system frame and a feedback result of downlink data sent by terminal equipment; the interference information of the system frame is used for indicating a first time slot in the system frame, and the first time slot is a time slot with adjacent cell reference signal interference; and the base station adjusts the MCS value of the downlink channel of the terminal equipment according to the interference information of the system frame and the feedback result of the downlink data. The base station can respectively adjust the MCS value of the downlink channel of the terminal equipment according to the time slot with the adjacent cell reference signal interference and the time slot without the adjacent cell reference signal interference, so that the MCS value of the downlink channel of the terminal equipment can be prevented from being influenced by a certain interference time slot, and the overall transmission efficiency is improved.
Some terms in the embodiments of the present application will be explained below to facilitate understanding by those skilled in the art.
1. A base station, which may include a plurality of cells. A base station may also be referred to as an access point, or a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or by other names, depending on the particular application. The network device may be configured to interconvert received air frames with Internet Protocol (IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) or a Code Division Multiple Access (CDMA), may also be a network device (NodeB) in a Wideband Code Division Multiple Access (WCDMA), may also be an evolved network device (eNB or e-NodeB) in a Long Term Evolution (LTE) system, a 5G base station in a 5G network architecture (next generation system), and may also be a home evolved node B (HeNB), a relay node (relay node), a home base station (femto), a pico base station (pico), and the like, which are not limited in the embodiments of the present application.
2. A terminal device is a device that provides voice and/or data connectivity to a user. The terminal device may also be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), and so on.
For example, the terminal device may be a handheld device, a vehicle-mounted device, or the like having a wireless connection function. Currently, some examples of terminal devices are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in home (smart home), and the like.
The technical scheme provided by the embodiment of the application can be suitable for various systems, particularly 5G systems. For example, the applicable system may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a universal microwave Access (WiMAX) system, a 5G NR system, and the like.
3. Modulation and Coding Scheme (MCS), the base station informs the terminal what Modulation Scheme and Coding rate the Physical Downlink Shared Channel (PDSCH) Channel transmitted by the base station uses, or what Modulation Scheme and Coding rate the terminal should use when transmitting the PUSCH Channel. Different MCS value sizes determine different transmission efficiencies.
4. In the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, nor order.
5. And/or, describing the association relationship of the associated object, indicating that there may be three relationships, e.g., a and/or B, which may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Embodiments of the present application will be described below with reference to the drawings.
Fig. 1 shows a 5G mobile communication system to which an MCS value adjusting method provided in the present application is applied. As shown in the figure, the 5G mobile communication system (hereinafter, may be referred to as a 5G network) includes a 5G access network (mainly including a 5G base station 101) and a 5G core network 102. An interface between the 5G base station 101 and the 5G core network 102 is referred to as an S1 interface, and the 5G base station 101 and the 5G core network 102 communicate via an S1 interface. The 5G base station may also be referred to as eNB, and the 5G Core network may also be referred to as Evolved Packet Core (Evolved Packet Core, EPC).
The 5G base station 101 may manage at least one 5G cell (e.g., cell a or cell B), and the neighboring cell B to cell a may also be managed by the 5G base station in other networks. The terminal device 103a may access the 5G network through a cell a to implement wireless communication, and the terminal device 103B may access the 5G network through a cell B to implement wireless communication.
In cell a of the 5G network, the terminal device 103a may perform channel detection, interference detection, and mobility management measurement based on a reference signal 1 (e.g., a reference signal CSI or other reference signals for detecting a channel) sent by the 5G base station 101, and return the measurement result to the 5G base station 101. The 5G base station 101 may also transmit data to the terminal device 103a through a channel, and the terminal device 103a reports a quality indicator CQI of a downlink channel or a feedback result of downlink data to the base station 101 at the same time; the base station 101 adaptively adjusts the downlink transmission to an appropriate MCS value based on the quality indicator CQI of the downlink channel and the feedback result of the downlink data returned by the terminal device 103a, and in consideration of interference between users, thereby implementing adjustment of the modulation mode and the coding rate of the wireless link transmission to ensure the transmission quality of the wireless link.
In the neighboring cell B, the 5G base station 101 periodically transmits a reference signal 2 to the terminal device 103B, and the terminal device 103B may perform signal measurement, interference measurement, and mobility management measurement based on the received reference signal 2, and return a measurement result to the 5G base station 101.
However, when the 5G base station 101 periodically transmits the reference signal 2 to the terminal device 103B in the adjacent cell B, interference will be generated on the channel of the cell a, which affects the base station 101 to receive the feedback result of the quality indicator CQI and the downlink data of the downlink channel returned by the terminal device 103a in the cell a, resulting in inaccurate MCS value for subsequent adaptive adjustment, and thus transmission quality of a link cannot be ensured.
An MCS value adjusting method according to an embodiment of the present application is applicable to a communication system as shown in fig. 1, and a flow of the MCS value adjusting method according to the embodiment of the present application is described in detail with reference to fig. 2.
S201: a base station acquires interference information of a system frame and a feedback result of downlink data sent by terminal equipment; the interference information of the system frame is used for indicating a first time slot in the system frame, and the first time slot is a time slot in which adjacent cell reference signal interference exists.
Optionally, before the base station acquires the downlink feedback information reported by the terminal device, the base station sends data to the terminal device through a PDSCH transmission channel.
In one embodiment, the obtaining, by the base station, interference information of the system frame includes:
the base station acquires resource configuration information of the reference signal of the adjacent cell;
the base station determines the first time slot in the system frame according to the resource configuration information of the adjacent cell reference signal; and the base station determines the interference information of the system frame according to the position of the first time slot.
S202: and the base station adjusts the MCS value of the downlink channel of the terminal equipment according to the interference information of the system frame and the feedback result of the downlink data.
Optionally, first, the base station determines that the information acquired from the terminal device is a result of downlink data feedback (for example, Hybrid Automatic Repeat reQuest (HARQ)), or a downlink channel quality indication cqi, so that the following two embodiments are specifically included for the two cases:
in one embodiment, the base station determines that the information acquired from the terminal device is a result of downlink data feedback. The method specifically comprises the following two implementation modes:
in a first implementation manner, the adjusting, by the base station, the MCS value of the downlink channel of the terminal device according to the interference information of the system frame and the feedback result of the downlink data includes:
the base station determines a second time slot in the system frame according to the interference information of the system frame, wherein the second time slot is a time slot without the interference of the reference signal of the adjacent region; and the base station adjusts the MCS value of the downlink channel of the terminal equipment in the second time slot in a first adjusting mode according to the feedback result of the downlink data.
In a second implementation: the base station determines the first time slot in the system frame according to the interference information of the system frame; and the base station adjusts the MCS value of the downlink channel of the terminal equipment in the first time slot in a second adjustment mode according to the feedback result of the downlink data.
In a first implementation manner, the base station adjusts the MCS value in the second time slot in a first adjustment manner according to the feedback result of the downlink data, and specifically includes the following two cases:
in the first case: and if the base station determines that the feedback result of the downlink data is Acknowledgement (ACK) information, the MCS value is adjusted up to 0.1 in the second time slot.
For example, in a time slot where there is no adjacent cell reference signal interference, the base station determines an MCS1 value of the downlink channel of the terminal device, and if the feedback result of the downlink data is ACK, the adjusted value of the downlink channel MCS 1' of the terminal device is: MCS1 ═ MCS1+ 0.1.
In the second case: and if the base station determines that the feedback result of the downlink data is Negative Acknowledgement (NACK) information, the MCS value is adjusted down by 0.3 in the second time slot.
For example, in a time slot where there is no adjacent cell reference signal interference, the base station determines the MCS1 value of the downlink channel of the terminal device, and if the feedback result of the downlink data is NACK, the adjusted value of the downlink channel MCS 1' of the terminal device is: MCS1 ═ MCS 1-0.3.
In a second implementation manner, the base station adjusts, according to the feedback result of the downlink data, the MCS value of the downlink channel of the terminal device in the first time slot in a second adjustment manner, which specifically includes the following two cases:
in the first case: and if the base station determines that the feedback result of the downlink data is Acknowledgement (ACK) information, the MCS value is adjusted up to 0.1 in the first time slot.
For example, in a time slot with adjacent cell reference signal interference, the base station determines an MCS2 value of the downlink channel of the terminal device, and if the feedback result of the downlink data is ACK, the adjusted value of the downlink channel MCS 2' of the terminal device is: MCS2 ═ MCS2+ 0.1.
In the second case: and if the base station determines that the feedback result of the downlink data is Negative Acknowledgement (NACK) information, the MCS value is adjusted down by 0.4 in the first time slot.
For example, in a time slot with adjacent cell reference signal interference, the base station determines an MCS2 value of the downlink channel of the terminal device, and if the feedback result of the downlink data is NACK, the adjusted value of the downlink channel MCS 2' of the terminal device is: MCS2 ═ MCS 2-0.4.
According to the above, because the interference of the time slot with the neighbor reference signal is larger than that of other time slots on the air interface channel, the time slot with the neighbor reference signal interference and the time slot without the neighbor reference signal interference need to be distinguished, so that different MCS adjustment modes (a first adjustment mode and a second adjustment mode) are respectively adopted for the time slot with the neighbor reference signal interference and the time slot without the neighbor reference signal interference, and therefore, the MCS value is reduced more quickly for the time slot with the neighbor reference signal to ensure the transmission accuracy.
In another embodiment, when the base station determines that the information acquired from the terminal device is a result of downlink data feedback:
the base station acquires a Channel Quality Indicator (CQI) of downlink data sent by the terminal equipment, and the base station calculates and obtains an initial MCS value of the downlink channel of the terminal equipment according to the CQI; and the base station determines that the MCS value of the downlink channel of the terminal equipment is equal to the initial MCS value.
Specifically, if the base station calculates an initial MCS1(MCS2) value of the downlink channel of the terminal device according to the CQI, the adjusted MCS1 '(MCS 2') value of the downlink channel of the terminal device is: MCS1 ═ MCS2 ═ initial MCS value.
In this embodiment of the present application, in the process of performing S201 to acquire the interference information of the system frame, the base station may acquire the resource configuration information of the neighboring cell reference signal through a procedure shown in fig. 3, where the specific steps are as follows:
s301: the base station acquires a neighbor cell information table, wherein the neighbor cell table comprises information of all neighbor cells, and the neighbor cell information table comprises resource configuration information of reference signals sent by all the neighbor cells.
For example, the neighbor information table includes: the information of the cell A, the cell B and the cell C, wherein the neighbor cell information table comprises resource configuration information of reference signals sent by each cell.
S302: and the base station inquires the adjacent cell information table to determine whether all adjacent cells are inquired.
S303: and if all the neighbor cells are inquired, finishing the inquiry.
For example, if the base station determines that the C cell is completely queried, the base station does not perform query on the C cell any more.
S304: and if all the neighbor cells are not queried, the base station determines the neighbor cells which are not queried.
S305: and the base station sends a request for inquiring the reference signal information to the base station managing the neighboring cells which are not inquired.
For example, the base station determines that the a cell and the B cell are not queried, and the base station sends a request for reference signal information query to a base station managing the a cell and the B cell, respectively.
S306: and judging whether the base station receives a query request response returned by the base station of the neighboring cell which is not queried.
S307: and if the base station receives a query request response returned by the base station of the neighboring cell which is not queried, storing the resource configuration information of the reference signal of the neighboring cell which is not queried, and marking.
For example, if the base station receives a query request response returned by the base station managing the cell a, the base station stores the resource configuration information of the reference signal of the cell a, and marks the time slot position corresponding to the system frame to indicate that the reference signal interference of the neighboring cell a exists on the time slot.
S308: and if the base station does not receive the query request response returned by the base station of the neighboring cell which is not queried, judging whether the query times of the cell exceed the set times.
For example, if the base station does not receive a query request response returned by the base station managing the cell B, the base station determines whether the number of queries of the cell B exceeds N.
S309: and if the inquiry times of the cell exceed the set times, not inquiring the cell.
If the number of times of querying the cell is determined not to exceed the set number of times, the base station continues to perform S305.
As can be seen from the above, since the reference signal is the configuration of the cell, the resource configuration information of the corresponding reference signal is determined after the cell is established. Therefore, in order to obtain the resource configuration information of the reference signal of the neighboring cell, the base station needs to periodically query the resource configuration information of the neighboring cell, store the resource configuration information of the neighboring cell after querying, and determine the time slot position where the interference of the reference signal of the neighboring cell exists in the system frame of the base station, so as to subsequently obtain the interference information of the system frame.
Optionally, the terminal device may report the downlink channel quality indicator CQI and the result information of downlink data feedback to the base station at the same time.
As can be seen from the above, in the present application, the base station may obtain resource configuration information of the neighboring cell reference signal in advance, so as to obtain a high interference timeslot where the neighboring cell reference signal exists in advance according to the resource configuration information of the neighboring cell reference signal; then, the base station respectively adjusts adaptive MCS (namely the AMC process) according to the high interference time slot with the adjacent area reference signal and the time slot without the adjacent area reference signal, so that the time slot with the adjacent area reference signal interference uses a low MCS value to ensure correct transmission; and the time slot without the interference of the reference signal of the adjacent cell can use a high MCS value to ensure the speed of downlink transmission. Therefore, the influence of a certain interference time slot on the overall MCS value is avoided, and the overall transmission efficiency is improved.
Based on the above embodiment shown in fig. 2, the present application further provides an example of determining an MCS value, and a flowchart of the implementation is shown in fig. 4:
s401: the base station acquires interference information of a system frame and feedback information of downlink data sent by the terminal equipment.
Before the base station acquires the downlink time slot configuration information, the base station acquires the resource configuration information of the adjacent cell reference signal, and determines the time slot with the adjacent cell reference signal interference in a system frame according to the resource configuration information of the adjacent cell reference signal; and determining interference information of the system frame according to the determined time slot position with the adjacent cell reference signal interference in the system frame.
S402: and the base station judges according to the feedback information of the downlink data and determines whether the feedback information of the downlink data is CQI or not.
S403: based on step a402, the base station determines that the feedback information of the downlink data is CQI, and then calculates an initial MCS value according to the CQI.
S404: the base station adjusts the MCS value (indicated by MCS1 or MCS2) of the downlink channel of the terminal device to the initial MCS value, i.e., MCS1 ═ MCS2 ═ initial MCS.
S405: based on step S402, if the base station determines that the downlink feedback information is not the CQI, it continues to determine whether there is a time slot with neighboring cell reference signal interference according to the interference information of the system frame.
It should be noted that, according to the interference information of the system frame, whether a neighboring cell reference signal exists is judged; then, according to the interference information of the system frame, determining the time slot position with the adjacent cell reference signal interference and the time slot position without the adjacent cell reference signal interference; and respectively adjusting the MCS aiming at the time slot with the adjacent cell reference signal interference and the time slot without the adjacent cell reference signal interference.
S406: based on step S405, the base station determines that there is a time slot with neighbor cell reference signal interference. And on the time slot with the adjacent cell reference signal interference, the base station continuously judges whether the feedback result information of the downlink data is ACK or not according to the feedback result information of the downlink data in the feedback information.
S407: and if the base station determines that the feedback result of the downlink data is ACK, the base station determines that the MCS2 value of the downlink channel of the terminal equipment is adjusted up by 0.1, that is, MCS2 ═ MCS2+ 0.1.
S408: and if the base station determines that the feedback result of the downlink data is not ACK, the base station determines that the MCS2 value of the downlink channel of the terminal equipment is adjusted downward by 0.4, namely MCS 2' is MCS 2-0.4.
S409: based on step S405, the base station determines a time slot without neighbor cell reference signal interference. And when the time slot has no adjacent cell reference signal interference, the base station continues to judge whether the feedback result information of the downlink data is ACK or not according to the feedback result information of the downlink data in the feedback information.
S410: and if the base station determines that the feedback result of the downlink data is ACK, the base station determines that the MCS1 value of the downlink channel of the terminal equipment is adjusted up by 0.1, that is, MCS1 ═ MCS1+ 0.1.
S411: and if the base station determines that the feedback result of the downlink data is not ACK, the base station determines that the MCS1 value of the downlink channel of the terminal equipment is adjusted downward by 0.3, namely MCS 1' is MCS 1-0.3.
To sum up, the embodiment of the present application provides a method for adjusting an MCS value, in which a base station obtains interference information of a system frame and a feedback result of downlink data sent by a terminal device; the interference information of the system frame is used for indicating a first time slot in the system frame, and the first time slot is a time slot with adjacent cell reference signal interference; and the base station adjusts the MCS value of the downlink channel of the terminal equipment according to the interference information of the system frame and the feedback result of the downlink data. The base station of the method can adjust the MCS value of the downlink channel of the terminal equipment by different MCS adjusting modes according to the time slot with the adjacent cell reference signal interference and the time slot without the adjacent cell reference signal interference. The time slot with the adjacent cell reference signal interference uses a low MCS value to ensure correct transmission; and the time slot without the interference of the reference signal of the adjacent region can use a high MCS value to ensure the speed of downlink transmission. Therefore, the method can avoid that a certain interference time slot influences the MCS value of the downlink channel of the terminal equipment, thereby improving the overall transmission efficiency.
Based on the same technical concept, the embodiment of the present application further provides a base station, and a structure of the base station is shown in fig. 5. The base station 500 includes: an acquisition unit 501 and a processing unit 502. The base station 500 may be applied to the 5G mobile communication system shown in fig. 1, and may implement one MCS value adjustment method shown in fig. 2 above. The functions of the various elements in the base station 500 are described below.
An obtaining unit 501, configured to obtain interference information of a system frame and a feedback result of downlink data sent by the terminal device; the interference information of the system frame is used for indicating a first time slot in the system frame, and the first time slot is a time slot with adjacent cell reference signal interference;
a processing unit 502, configured to adjust an MCS value of a downlink channel of the terminal device according to the interference information of the system frame and the feedback result of the downlink data.
In one embodiment, the obtaining unit 501 obtains the interference information of the system frame, including:
acquiring resource configuration information of the neighbor cell reference signal;
determining the first time slot in the system frame according to the resource configuration information of the adjacent cell reference signal;
and determining the interference information of the system frame according to the position of the first time slot.
In one embodiment, the adjusting, by the processing unit 502, the MCS value of the downlink channel of the terminal device according to the interference information of the system frame and the feedback result of the downlink data includes:
determining a second time slot in the system frame according to the interference information of the system frame, wherein the second time slot is a time slot without the interference of the reference signal of the adjacent region; adjusting the MCS value of the downlink channel of the terminal equipment in the second time slot in a first adjusting mode according to the feedback result of the downlink data; and/or the presence of a gas in the gas,
determining the first time slot in the system frame according to the interference information of the system frame; and adjusting the MCS value of the downlink channel of the terminal equipment in the first time slot in a second adjusting mode according to the feedback result of the downlink data.
In one embodiment, the adjusting, by the processing unit 502, the MCS value in the second slot according to the feedback result of the downlink data by a first adjusting method includes:
if the feedback result of the downlink data is determined to be Acknowledgement (ACK) information, the MCS value is adjusted up to 0.1 in the second time slot; or
And if the feedback result of the downlink data is determined to be Negative Acknowledgement (NACK) information, adjusting the MCS value down by 0.3 in the second time slot.
In one embodiment, the adjusting, by the processing unit 502, the MCS value in the first time slot according to the feedback result of the downlink data by a second adjusting method includes:
if the feedback result of the downlink data is determined to be Acknowledgement (ACK) information, the MCS value is adjusted up to 0.1 in the first time slot; or
And if the feedback result of the downlink data is determined to be Negative Acknowledgement (NACK) information, adjusting the MCS value down by 0.4 in the first time slot.
In one embodiment, the processing unit 502 is further configured to: acquiring, by the acquiring unit 501, a channel quality indicator CQI of downlink data sent by the terminal device; calculating to obtain an initial MCS value of a downlink channel of the terminal equipment according to the CQI; and determining that the MCS value of the downlink channel of the terminal equipment is equal to the initial MCS value.
Based on the same technical concept, the embodiment of the present application further provides a base station, which may be applied to the 5G mobile communication system shown in fig. 1 and may implement an MCS value adjustment method shown in fig. 2. Referring to fig. 6, the base station 600 includes: a transceiver 601, a processor 602, a memory 603. Wherein, the transceiver 601, the processor 602 and the memory 603 are connected to each other.
Optionally, the transceiver 601, the processor 602, and the memory 603 are connected to each other through a bus 604. The bus 604 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc.
The transceiver 601 is configured to obtain interference information of a system frame and a feedback result of downlink data sent by the terminal device; the interference information of the system frame is used for indicating a first time slot in the system frame, and the first time slot is a time slot with adjacent cell reference signal interference;
the processor 602 is configured to adjust an MCS value of a downlink channel of the terminal device according to the interference information of the system frame and the feedback result of the downlink data.
In one embodiment, the transceiver 601 obtains the interference information of the system frame, including:
acquiring resource configuration information of the neighbor cell reference signal;
determining the first time slot in the system frame according to the resource configuration information of the adjacent cell reference signal;
and determining the interference information of the system frame according to the position of the first time slot.
In one embodiment, the adjusting, by the processor 602, the MCS value of the downlink channel of the terminal device according to the interference information of the system frame and the feedback result of the downlink data includes:
determining a second time slot in the system frame according to the interference information of the system frame, wherein the second time slot is a time slot without the interference of the reference signal of the adjacent region; adjusting the MCS value of the downlink channel of the terminal equipment in the second time slot in a first adjusting mode according to the feedback result of the downlink data; and/or the presence of a gas in the gas,
determining the first time slot in the system frame according to the interference information of the system frame; and adjusting the MCS value of the downlink channel of the terminal equipment in the first time slot in a second adjusting mode according to the feedback result of the downlink data.
In an embodiment, the processor 602 adjusts the MCS value in the second time slot according to the feedback result of the downlink data by a first adjustment method, including:
if the feedback result of the downlink data is determined to be Acknowledgement (ACK) information, the MCS value is adjusted up to 0.1 in the second time slot; or
And if the feedback result of the downlink data is determined to be Negative Acknowledgement (NACK) information, adjusting the MCS value down by 0.3 in the second time slot.
In an embodiment, the processor 602 adjusts the MCS value in the first time slot according to a feedback result of the downlink data by a second adjustment method, including:
if the feedback result of the downlink data is determined to be Acknowledgement (ACK) information, the MCS value is adjusted up to 0.1 in the first time slot; or
And if the feedback result of the downlink data is determined to be Negative Acknowledgement (NACK) information, adjusting the MCS value down by 0.4 in the first time slot.
In one embodiment, the processor 602 is further configured to: acquiring a Channel Quality Indicator (CQI) of downlink data sent by the terminal equipment; calculating to obtain an initial MCS value of a downlink channel of the terminal equipment according to the CQI; and determining that the MCS value of the downlink channel of the terminal equipment is equal to the initial MCS value.
Based on the foregoing embodiments, the present application further provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a computer, the computer program causes the computer to execute a MCS value adjusting method provided in the embodiments shown in fig. 2 to fig. 4.
Based on the above embodiments, the embodiments of the present application further provide a chip, where the chip is used to read a computer program stored in a memory, and implement the MCS value adjustment method provided in the embodiments shown in fig. 2 to fig. 4.
Based on the foregoing embodiments, an embodiment of the present application provides a chip system, where the chip system includes a processor, and is used to support a computer device to implement the functions of the device in the embodiment shown in fig. 5. In one possible design, the system-on-chip further includes a memory for storing programs and data necessary for the computer device. The chip system may be constituted by a chip, or may include a chip and other discrete devices.
To sum up, in the technical solution of the embodiment of the present application, a base station obtains interference information of a system frame and a feedback result of downlink data sent by a terminal device; the interference information of the system frame is used for indicating a first time slot in the system frame, and the first time slot is a time slot with adjacent cell reference signal interference; and the base station adjusts the MCS value of the downlink channel of the terminal equipment according to the interference information of the system frame and the feedback result of the downlink data. The base station can respectively adjust the MCS value of the downlink channel of the terminal equipment by different MCS adjustment modes according to the time slot with the adjacent cell reference signal interference and the time slot without the adjacent cell reference signal interference, so that the MCS value of the downlink channel of the terminal equipment is prevented from being influenced by a certain interference time slot with the adjacent cell reference signal, and the overall transmission efficiency is improved.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (14)
1. A Modulation and Coding Strategy (MCS) value adjusting method is characterized by comprising the following steps:
a base station acquires interference information of a system frame and a feedback result of downlink data sent by terminal equipment; the interference information of the system frame is used for indicating a first time slot in the system frame, and the first time slot is a time slot with adjacent cell reference signal interference;
and the base station adjusts the MCS value of the downlink channel of the terminal equipment according to the interference information of the system frame and the feedback result of the downlink data.
2. The method of claim 1, wherein the base station obtaining the interference information of the system frame comprises:
the base station acquires resource configuration information of the reference signal of the adjacent cell;
the base station determines the first time slot in the system frame according to the resource configuration information of the adjacent cell reference signal;
and the base station determines the interference information of the system frame according to the position of the first time slot.
3. The method of claim 1, wherein the base station adjusting the MCS value of the downlink channel of the terminal device according to the interference information of the system frame and the feedback result of the downlink data comprises:
the base station determines a second time slot in the system frame according to the interference information of the system frame, wherein the second time slot is a time slot without the interference of the reference signal of the adjacent region; the base station adjusts the MCS value of the downlink channel of the terminal equipment in the second time slot in a first adjusting mode according to the feedback result of the downlink data; and/or the presence of a gas in the gas,
the base station determines the first time slot in the system frame according to the interference information of the system frame; and the base station adjusts the MCS value of the downlink channel of the terminal equipment in the first time slot in a second adjustment mode according to the feedback result of the downlink data.
4. The method as claimed in claim 3, wherein the base station adjusting the MCS value in the second time slot by a first adjustment method according to the feedback result of the downlink data, comprises:
if the base station determines that the feedback result of the downlink data is Acknowledgement (ACK) information, the MCS value is adjusted up to 0.1 in the second time slot; or
And if the base station determines that the feedback result of the downlink data is Negative Acknowledgement (NACK) information, the MCS value is adjusted down by 0.3 in the second time slot.
5. The method as claimed in claim 3, wherein the base station adjusting the MCS value in the first time slot by a second adjustment method according to the feedback result of the downlink data, comprises:
if the base station determines that the feedback result of the downlink data is Acknowledgement (ACK) information, the MCS value is adjusted up to 0.1 in the first time slot; or
And if the base station determines that the feedback result of the downlink data is Negative Acknowledgement (NACK) information, the MCS value is adjusted down by 0.4 in the first time slot.
6. The method of claim 1, wherein the method further comprises:
the base station acquires a Channel Quality Indicator (CQI) of downlink data sent by the terminal equipment;
the base station calculates and obtains an initial MCS value of a downlink channel of the terminal equipment according to the CQI;
and the base station determines that the MCS value of the downlink channel of the terminal equipment is equal to the initial MCS value.
7. A base station, comprising:
an obtaining unit, configured to obtain interference information of a system frame and a feedback result of downlink data sent by the terminal device; the interference information of the system frame is used for indicating a first time slot in the system frame, and the first time slot is a time slot with adjacent cell reference signal interference;
and the processing unit is used for adjusting the MCS value of the downlink channel of the terminal equipment according to the interference information of the system frame and the feedback result of the downlink data.
8. The base station of claim 7, wherein the obtaining unit obtains the interference information of the system frame, comprising:
acquiring resource configuration information of the neighbor cell reference signal;
determining the first time slot in the system frame according to the resource configuration information of the adjacent cell reference signal;
and determining the interference information of the system frame according to the position of the first time slot.
9. The base station of claim 7, wherein the processing unit adjusts the MCS value of the downlink channel of the terminal device according to the interference information of the system frame and the feedback result of the downlink data, and includes:
determining a second time slot in the system frame according to the interference information of the system frame, wherein the second time slot is a time slot without the interference of the reference signal of the adjacent region; adjusting the MCS value of the downlink channel of the terminal equipment in the second time slot in a first adjusting mode according to the feedback result of the downlink data; and/or the presence of a gas in the gas,
determining the first time slot in the system frame according to the interference information of the system frame; and adjusting the MCS value of the downlink channel of the terminal equipment in the first time slot in a second adjusting mode according to the feedback result of the downlink data.
10. The base station of claim 9, wherein the processing unit adjusts the MCS value in the second time slot by a first adjustment method according to the feedback result of the downlink data, comprising:
if the feedback result of the downlink data is determined to be Acknowledgement (ACK) information, the MCS value is adjusted up to 0.1 in the second time slot; or
And if the feedback result of the downlink data is determined to be Negative Acknowledgement (NACK) information, adjusting the MCS value down by 0.3 in the second time slot.
11. The base station of claim 9, wherein the processing unit adjusts the MCS value in the first time slot according to the feedback result of the downlink data by a second adjustment method, comprising:
if the feedback result of the downlink data is determined to be Acknowledgement (ACK) information, the MCS value is adjusted up to 0.1 in the first time slot; or
And if the feedback result of the downlink data is determined to be Negative Acknowledgement (NACK) information, adjusting the MCS value down by 0.4 in the first time slot.
12. The base station of claim 7, wherein the processing unit is further configured to:
acquiring a Channel Quality Indicator (CQI) of downlink data sent by the terminal equipment through the acquisition unit;
calculating to obtain an initial MCS value of a downlink channel of the terminal equipment according to the CQI;
and determining that the MCS value of the downlink channel of the terminal equipment is equal to the initial MCS value.
13. A computer-readable storage medium, in which a computer program is stored which, when run on an index monitoring device, causes the index monitoring device to carry out the method according to any one of claims 1-6.
14. A chip for reading a computer program stored in a memory for performing the method according to any one of claims 1 to 6.
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