CN111163025A - Method and network device for acquiring and configuring subframe structure - Google Patents

Method and network device for acquiring and configuring subframe structure Download PDF

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Publication number
CN111163025A
CN111163025A CN201911266267.4A CN201911266267A CN111163025A CN 111163025 A CN111163025 A CN 111163025A CN 201911266267 A CN201911266267 A CN 201911266267A CN 111163025 A CN111163025 A CN 111163025A
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subframe
information
network device
channel
subframe structure
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CN111163025B (en
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刘鹍鹏
刘江华
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • 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
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing

Abstract

The embodiment of the invention discloses a method for acquiring and configuring a subframe structure and network equipment, which relate to the field of communication and realize the dynamic acquisition and configuration of the subframe structure according to a user propagation environment, so that the subframe structure is more suitable for the current channel propagation characteristic, and the performance of a communication system is improved. The method provided by the embodiment of the invention comprises the following steps: acquiring subframe structure information of a first subframe through first network equipment; and acquiring the subframe structure of the first subframe according to the indication of the subframe structure information of the first subframe. The method is used for acquiring and configuring the subframe structure among network devices in the communication system.

Description

Method and network device for acquiring and configuring subframe structure
Technical Field
The present invention relates to the field of communications, and in particular, to a method and a network device for acquiring and configuring a subframe structure.
Background
The sub-frame of the communication system includes Orthogonal Frequency Division Multiplexing (OFDM) symbols for transmitting data in user communication and Cyclic Prefixes (CP) before each OFDM symbol for preventing interference between subcarriers and between symbols; the subframe structure includes the number of OFDM symbols included in the subframe and the length of the CP before each OFDM symbol. The performance of the communication system is determined by the adaptation degree of the subframe structure and the channel propagation characteristics in the communication system; the more the subframe structure is adapted to the channel propagation characteristics, the higher the performance of the communication system.
For example, the CP length in the subframe structure is related to the delay spread, according to the delay spread of the user propagation environment, for a user with a large delay spread, taking a user in a residential building as an example, a user on a low floor has a large delay spread because of more shielding objects and more reflection and refraction, and if the inter-subcarrier interference and the inter-symbol interference are to be better prevented, the CP length included in the subframe of the user is scheduled to be correspondingly increased; for a user with small time delay expansion, such as a user on a high floor, the number of shelters is small, and the probability that the propagation path is a direct access (LOS) path is high, so the time delay expansion is small, the CP of the subframe scheduling the user should be correspondingly small, the waste of network resources is avoided, and the communication rate is low; therefore, the fixed subframe structure has low adaptability to users with different channel propagation characteristics, which results in low performance of the communication system.
The subframe structure of the current mobile network is a fixed subframe structure, and in the using process, the network equipment communicates by adopting the configured subframe structure.
The inventor finds that the prior art has at least the following defects: with a fixed subframe structure, the subframe structure has low adaptability to the current channel propagation characteristics, thereby degrading the performance of the communication system.
Disclosure of Invention
The invention provides a method and equipment for acquiring and configuring a subframe structure, which are used for dynamically acquiring and configuring the subframe structure, so that the subframe structure is more suitable for the current channel propagation characteristic, and the performance of a communication system is improved.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, a method for acquiring a subframe structure is provided, which includes,
the first network equipment acquires subframe structure information of a first subframe;
acquiring the subframe structure of the first subframe according to the indication of the subframe structure information of the first subframe; wherein the subframe structure information of the first subframe is a characterization of the subframe structure of the first subframe.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the subframe structure information includes one or more of the following information: the number of OFDM symbols contained in a subframe, the length of each OFDM symbol, the length of a cyclic prefix CP of each OFDM symbol, the length of a guard Time interval, the length of a downlink Pilot Time Slot (DwPTS), and the length of an Uplink Pilot Time Slot (UPPTS).
With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect,
the subframe structure information is sent to a first network device in a first network device specific signaling form;
alternatively, the first and second electrodes may be,
and the subframe structure information is sent to a first network equipment group in a multicast mode, wherein the first network equipment group comprises Q first network equipment, and Q is more than or equal to 2.
With reference to the first aspect, in a third possible implementation manner of the first aspect, the acquiring, by the first network device, subframe structure information of the first subframe includes,
the first network equipment detects information of first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe, wherein N is a positive integer greater than or equal to 1.
With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the detecting, by the first network device, information of first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe includes,
the first network device detects a Physical Control Format Indicator Channel (PCFICH) transmitted in the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
the first network equipment detects a PCFICH-like channel transmitted in the first N OFDM symbols of the first subframe to acquire subframe structure information of the first subframe, wherein the PCFICH-like channel is a channel with a similar structure to a PCIFCH but different transmission resource positions;
alternatively, the first and second electrodes may be,
the first network device detects a Physical Hybrid ARQ Indicator Channel (PHICH) or a PHICH-like Channel transmitted in the first N OFDM symbols of the first subframe to acquire subframe structure information of the first subframe, wherein the PHICH-like Channel is a Channel with a resource position different from that of similar transmission of the PHICH structure;
alternatively, the first and second electrodes may be,
the first network device detects a Physical Downlink Control Channel (PDCCH) transmitted in the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe.
With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the method further includes,
receiving a high-level signaling sent by a second network device, wherein the high-level signaling comprises first indication information used for indicating that the first subframe is a fixed configuration subframe or a variable configuration subframe;
correspondingly, the first network device detecting the PCFICH transmitted in the first N OFDM symbols of the first subframe acquires the subframe structure information of the first subframe, including,
if the first subframe is judged to be a fixed configuration subframe according to the first indication information, the first network device detects the PCFICH transmitted in the first N OFDM symbols of the first subframe, and analyzes the PCFICH into the number of symbols occupied by the PDCCH;
if the first subframe is judged to be a variable configuration subframe according to the first indication information, the first network device detects the PCFICH transmitted in the first N OFDM symbols of the first subframe, analyzes the PCFICH into subframe structure information of the first subframe, and fixes the number of symbols occupied by the PDCCH indicated by the PCFICH.
With reference to the fourth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the detecting, by the first network device, the PDCCH transmitted in the first N OFDM symbols of the first subframe to obtain the subframe structure information of the first subframe includes,
the first network device detects Information in Downlink Control Information (DCI) in a PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe to obtain subframe structure Information of the first subframe;
alternatively, the first and second electrodes may be,
the first network device detects scrambling code information of the DCI or a scrambling code of Cyclic Redundancy Check (CRC) of the DCI in a PDCCH public search interval transmitted in first N symbols of the first subframe to acquire subframe structure information of the first subframe.
With reference to the first aspect, in a seventh possible implementation manner of the first aspect, the acquiring, by the first network device, subframe structure information of the first subframe includes,
and the first network equipment detects the information of the last OFDM symbol of the previous subframe of the first subframe to acquire the subframe structure information of the first subframe.
With reference to the first aspect, in an eighth possible implementation manner of the first aspect, the acquiring, by the first network device, subframe structure information of the first subframe includes,
the first network device detects a Primary Synchronization Signal (PSS) channel or a Secondary Synchronization Signal (SSS) channel or a PSS-like channel or an SSS-like channel of the first subframe through correlation detection to obtain subframe structure information of the first subframe, wherein the PSS-like channel is a channel having a structure similar to that of the PSS channel but different transmission resource positions, and the SSS-like channel is a channel having a structure similar to that of the SSS channel but different transmission resource positions.
With reference to the first aspect, in a ninth possible implementation manner of the first aspect, the acquiring, by the first network device, subframe structure information of the first subframe includes,
the first network equipment detects the pilot frequency information of the first subframe to acquire the subframe structure information of the first subframe; wherein the pilot information comprises one or more of the following pilots: a Cell-specific pilot (CRS), a Channel State Information measurement pilot (CSI-RS), and a Demodulation Reference Signal (DMRS).
With reference to the ninth possible implementation manner of the first aspect, in a tenth possible implementation manner of the first aspect, the detecting, by the first network device, pilot information of the first subframe to obtain subframe structure information of the first subframe includes,
the first network equipment detects scrambling code information or spreading code information of the pilot frequency information of the first subframe to acquire subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
and the first network equipment detects the pilot frequency information of at least two OFDM symbols of the first subframe and obtains the subframe structure information of the first subframe through related detection.
With reference to the first aspect, in an eleventh possible implementation manner of the first aspect, the acquiring, by the first network device, subframe structure information of the first subframe includes,
the first network equipment detects rank information of the first subframe to acquire subframe structure information of the first subframe, wherein different rank information corresponds to different subframe structures;
alternatively, the first and second electrodes may be,
the first network device detects Reference Signal Receiving Power (RSRP) information of the first subframe to obtain structure information of the first subframe, wherein different intervals where the RSRP information is located correspond to different subframe structures.
In a second aspect, a method for configuring a subframe structure is provided, including:
sending subframe structure information of a first subframe to first network equipment, so that the first network equipment acquires the subframe structure information of the first subframe; wherein the subframe structure information of the first subframe is a feature description of the subframe structure of the first subframe that needs to be configured.
With reference to the second aspect, in a first possible implementation manner of the second aspect, the subframe structure information includes one or more of the following information: the number of OFDM symbols contained in the subframe, the length of each OFDM symbol, the length of CP of each OFDM symbol, the length of a guard time interval, the length of DwPTS and the length of UPPTS.
With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect,
the subframe structure information is sent to a first network device in a first network device specific signaling form;
alternatively, the first and second electrodes may be,
and the subframe structure information is sent to a first network equipment group in a multicast mode, wherein the first network equipment group comprises Q first network equipment, and Q is more than or equal to 2.
With reference to the second aspect, in a third possible implementation manner of the second aspect, the sending the subframe structure information of the first subframe to the first network device includes,
and sending the subframe structure information of the first subframe to first network equipment by using information bearing of first N OFDM symbols of the first subframe, wherein N is a positive integer greater than or equal to 1.
With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the sending the subframe structure information of the first subframe to the first network device by using information bearers of first N OFDM symbols of the first subframe includes,
sending the subframe structure information of the first subframe to the first network device by using a PCFICH bearer transmitted in the first N OFDM symbols of the first subframe;
alternatively, the first and second electrodes may be,
transmitting subframe structure information of the first subframe to the first network device using a PCFICH-like channel bearer transmitted in the first N OFDM symbols of the first subframe, wherein the PCFICH-like channel is a channel with a similar structure to a PCIFCH but different transmission resource positions;
alternatively, the first and second electrodes may be,
sending subframe structure information of the first subframe to the first network equipment by using a PHICH or a PHICH-like channel bearer transmitted in the first N OFDM symbols of the first subframe, wherein the PHICH-like channel is a channel with a resource position different from that of the PHICH structure similar transmission;
alternatively, the first and second electrodes may be,
and sending the subframe structure information of the first subframe to the first network equipment by using the PDCCH (physical downlink control channel) transmitted in the first N OFDM symbols of the first subframe.
With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the method further includes,
sending a high-level signaling to a first network device, wherein the high-level signaling includes first indication information for indicating that the first subframe is a fixed configuration subframe or a variable configuration subframe;
accordingly, the transmitting the subframe structure information of the first subframe to the first network device using a physical control format indicator channel PCFICH transmitted in the first N OFDM symbols of the first subframe comprises,
if the first subframe is a fixed configuration subframe, the PCFICH is used for indicating symbols occupied by the PDCCH;
and if the first subframe is a variable configuration subframe, sending the subframe structure information of the first subframe to the first network device by using a PCFICH bearer transmitted in the first N OFDM symbols of the first subframe, wherein the number of symbols occupied by the PDCCH indicated by the PCFICH is fixed.
With reference to the fourth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, the sending, to the first network device, the subframe structure information of the first subframe by using the PDCCH bearer transmitted in the first N OFDM symbols of the first subframe includes,
sending the subframe structure information of the first subframe to the first network device by using information bearing in DCI (downlink control information) in the PDCCH (physical downlink control channel) common search interval transmitted in the first N OFDM (orthogonal frequency division multiplexing) symbols of the first subframe;
alternatively, the first and second electrodes may be,
and sending the subframe structure information of the first subframe to the first network equipment by using the scrambling code information of the DCI or the scrambling code information of the CRC in the PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe.
With reference to the second aspect, in a seventh possible implementation manner of the second aspect, the sending the subframe structure information of the first subframe to the first network device includes,
and sending the subframe structure information of the first subframe to the first network equipment by using the information bearing of the last symbol of the previous subframe of the first subframe.
With reference to the second aspect, in an eighth possible implementation manner of the second aspect, the sending the subframe structure information of the first subframe to the first network device includes,
and sending the subframe structure information of the first subframe to the first network equipment by using a PSS channel or a SSS channel or a similar PSS channel or a SSS channel of the first subframe, wherein the similar PSS channel is a channel with a structure similar to that of the PSS channel but different transmission resource positions, and the similar SSS channel is a channel with a structure similar to that of the SSS channel but different transmission resource positions.
With reference to the second aspect, in a ninth possible implementation manner of the second aspect, the sending the subframe structure information of the first subframe to the first network device includes,
sending the subframe structure information of the first subframe to the first network equipment by using the pilot frequency information of the first subframe; wherein the pilot information comprises one or more of the following pilots: CRS, CSI-RS, DMRS.
With reference to the ninth possible implementation manner of the second aspect, in a tenth possible implementation manner of the second aspect, the sending the subframe structure information of the first subframe to the first network device by using the pilot information bearer of the first subframe includes,
sending the subframe structure information of the first subframe to the first network equipment by using scrambling code information or spreading code information of the pilot frequency information of the first subframe;
alternatively, the first and second electrodes may be,
and sending the subframe structure information of the first subframe to first network equipment by using pilot frequency information of at least two OFDM symbols of the first subframe.
In a third aspect, there is provided a first network device comprising,
an obtaining unit, configured to obtain subframe structure information of the first subframe;
the obtaining unit is further configured to obtain a subframe structure of the first subframe according to the indication of the subframe structure information of the first subframe; wherein the subframe structure information of the first subframe is a characterization of the subframe structure of the first subframe.
With reference to the third aspect, in a first possible implementation manner of the third aspect, the subframe structure information includes one or more of the following information: the number of OFDM symbols contained in the subframe, the length of each OFDM symbol, the length of CP of each OFDM symbol, the length of a guard time interval, the length of DwPTS and the length of UPPTS.
With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect,
the subframe structure information is sent to a first network device in a first network device specific signaling form;
alternatively, the first and second electrodes may be,
and the subframe structure information is sent to a first network equipment group in a multicast mode, wherein the first network equipment group comprises Q first network equipment, and Q is more than or equal to 2.
With reference to the third aspect, in a third possible implementation manner of the third aspect, the obtaining unit is specifically configured to,
and detecting information of the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe, wherein N is a positive integer greater than or equal to 1.
With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the obtaining unit is specifically configured to,
detecting PCFICH transmitted in the first N OFDM symbols of the first subframe to acquire subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
detecting a PCFICH-like channel transmitted in the first N OFDM symbols of the first subframe to acquire subframe structure information of the first subframe, wherein the PCFICH-like channel is a channel with a similar structure to a PCIFCH but different transmission resource positions;
alternatively, the first and second electrodes may be,
detecting a PHICH or a PHICH-like channel transmitted in the first N OFDM symbols of the first subframe to acquire subframe structure information of the first subframe, wherein the PHICH-like channel is a channel with a resource position different from that of PHICH structure similar transmission;
alternatively, the first and second electrodes may be,
and detecting the PDCCH transmitted in the first N OFDM symbols of the first subframe to obtain the subframe structure information of the first subframe.
With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the first network device further includes,
a receiving unit, configured to receive a high-level signaling sent by a second network device, where the high-level signaling includes first indication information for indicating that the first subframe is a fixed configuration subframe or a variable configuration subframe;
correspondingly, the obtaining unit is specifically configured to,
if the first subframe is judged to be a fixed configuration subframe according to the first indication information, the first network device detects the PCFICH transmitted in the first N OFDM symbols of the first subframe, and analyzes the PCFICH into the number of symbols occupied by the PDCCH;
if the first subframe is judged to be a variable configuration subframe according to the first indication information, the first network device detects the PCFICH transmitted in the first N OFDM symbols of the first subframe, analyzes the PCFICH into subframe structure information of the first subframe, and fixes the number of symbols occupied by the PDCCH indicated by the PCFICH.
With reference to the fourth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the obtaining unit is specifically configured to,
detecting information in DCI in PDCCH common search intervals transmitted in the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
and detecting the scrambling code information of the DCI or the scrambling code information of the CRC in the PDCCH public search interval transmitted in the first N symbols of the first subframe to acquire the subframe structure information of the first subframe.
With reference to the third aspect, in a seventh possible implementation manner of the third aspect, the obtaining unit is specifically configured to,
and detecting the information of the last OFDM symbol of the previous subframe of the first subframe to obtain the subframe structure information of the first subframe.
With reference to the third aspect, in an eighth possible implementation manner of the third aspect, the obtaining unit is specifically configured to,
detecting a PSS channel or a SSS channel or a similar PSS channel or a SSS channel of the first subframe to acquire subframe structure information of the first subframe through related detection, wherein the similar PSS channel is a channel with a structure similar to that of the PSS channel but different transmission resource positions, and the similar SSS channel is a channel with a structure similar to that of the SSS channel but different transmission resource positions.
With reference to the third aspect, in a ninth possible implementation manner of the third aspect, the obtaining unit is specifically configured to,
detecting pilot frequency information of the first subframe to acquire subframe structure information of the first subframe; wherein the pilot information comprises one or more of the following pilots: CRS, CSI-RS, DMRS.
With reference to the ninth possible implementation manner of the third aspect, in a tenth possible implementation manner of the third aspect, the obtaining unit is specifically configured to,
detecting scrambling code information or spreading code information of the pilot frequency information of the first subframe to acquire subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
and detecting pilot frequency information of at least two OFDM symbols of the first subframe to obtain subframe structure information of the first subframe through related detection.
With reference to the third aspect, in an eleventh possible implementation manner of the third aspect, the obtaining unit is specifically configured to,
detecting rank information of the first subframe to acquire subframe structure information of the first subframe, wherein different rank information corresponds to different subframe structures;
alternatively, the first and second electrodes may be,
and detecting RSRP information of the first subframe to acquire structure information of the first subframe, wherein different intervals in which the RSRP information is located correspond to different subframe structures.
In a fourth aspect, a second network device is provided, which includes:
a sending unit, configured to send subframe structure information of a first subframe to a first network device, so that the first network device obtains the subframe structure information of the first subframe; wherein the subframe structure information of the first subframe is a feature description of the subframe structure of the first subframe that needs to be configured.
With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the subframe structure information includes one or more of the following information: the number of OFDM symbols contained in the subframe, the length of each OFDM symbol, the length of CP of each OFDM symbol, the length of a guard time interval, the length of DwPTS and the length of UPPTS.
With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect,
the subframe structure information is sent to a first network device in a first network device specific signaling form;
alternatively, the first and second electrodes may be,
and the subframe structure information is sent to a first network equipment group in a multicast mode, wherein the first network equipment group comprises Q first network equipment, and Q is more than or equal to 2.
With reference to the fourth aspect, in a third possible implementation manner of the fourth aspect, the sending unit is specifically configured to,
and sending the subframe structure information of the first subframe to first network equipment by using information bearing of first N OFDM symbols of the first subframe, wherein N is a positive integer greater than or equal to 1.
With reference to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the sending unit is specifically configured to,
sending the subframe structure information of the first subframe to the first network device by using a PCFICH bearer transmitted in the first N OFDM symbols of the first subframe;
alternatively, the first and second electrodes may be,
transmitting subframe structure information of the first subframe to the first network device using a PCFICH-like channel bearer transmitted in the first N OFDM symbols of the first subframe, wherein the PCFICH-like channel is a channel with a similar structure to a PCIFCH but different transmission resource positions;
alternatively, the first and second electrodes may be,
sending subframe structure information of the first subframe to the first network equipment by using a PHICH or a PHICH-like channel bearer transmitted in the first N OFDM symbols of the first subframe, wherein the PHICH-like channel is a channel with a resource position different from that of the PHICH structure similar transmission;
alternatively, the first and second electrodes may be,
and sending the subframe structure information of the first subframe to the first network equipment by using the PDCCH (physical downlink control channel) transmitted in the first N OFDM symbols of the first subframe.
With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the sending unit is further configured to,
sending a high-level signaling to a first network device, wherein the high-level signaling includes first indication information for indicating that the first subframe is a fixed configuration subframe or a variable configuration subframe;
accordingly, the sending unit is specifically configured to,
if the first subframe is a fixed configuration subframe, the PCFICH is used for indicating symbols occupied by the PDCCH;
and if the first subframe is a variable configuration subframe, sending the subframe structure information of the first subframe to the first network device by using a PCFICH bearer transmitted in the first N OFDM symbols of the first subframe, wherein the number of symbols occupied by the PDCCH indicated by the PCFICH is fixed.
With reference to the fourth possible implementation manner of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the sending unit is specifically configured to,
sending the subframe structure information of the first subframe to the first network device by using information bearing in DCI (downlink control information) in the PDCCH (physical downlink control channel) common search interval transmitted in the first N OFDM (orthogonal frequency division multiplexing) symbols of the first subframe;
alternatively, the first and second electrodes may be,
and sending the subframe structure information of the first subframe to the first network equipment by using the scrambling code information of the DCI or the scrambling code information of the CRC in the PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe.
With reference to the fourth aspect, in a seventh possible implementation manner of the fourth aspect, the sending unit is specifically configured to,
and sending the subframe structure information of the first subframe to the first network equipment by using the information bearing of the last symbol of the previous subframe of the first subframe.
With reference to the fourth aspect, in an eighth possible implementation manner of the fourth aspect, the sending unit is specifically configured to,
and sending the subframe structure information of the first subframe to the first network equipment by using a PSS channel or a SSS channel or a channel similar to the PSS channel in structure but with different transmission resource positions or a channel similar to the SSS channel in structure but with different transmission resource positions.
With reference to the fourth aspect, in a ninth possible implementation manner of the fourth aspect, the sending unit is specifically configured to,
sending the subframe structure information of the first subframe to the first network equipment by using the pilot frequency information of the first subframe; wherein the pilot information comprises one or more of the following pilots: CRS, CSI-RS, DMRS.
With reference to the ninth possible implementation manner of the fourth aspect, in a tenth possible implementation manner of the fourth aspect, the sending unit is specifically configured to,
sending the subframe structure information of the first subframe to the first network equipment by using scrambling code information or spreading code information of the pilot frequency information of the first subframe;
alternatively, the first and second electrodes may be,
and sending the subframe structure information of the first subframe to first network equipment by using pilot frequency information of at least two OFDM symbols of the first subframe.
In a fifth aspect, a first network device is provided, which includes:
a processor, configured to obtain subframe structure information of the first subframe;
the processor is further configured to obtain a subframe structure of the first subframe according to the indication of the subframe structure information of the first subframe; wherein the subframe structure information of the first subframe is a characterization of the subframe structure of the first subframe.
With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the subframe structure information includes one or more of the following information: the number of OFDM symbols contained in the subframe, the length of each OFDM symbol, the length of CP of each OFDM symbol, the length of a guard time interval, the length of DwPTS and the length of UPPTS.
With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect,
the subframe structure information is sent to a first network device in a first network device specific signaling form;
alternatively, the first and second electrodes may be,
and the subframe structure information is sent to a first network equipment group in a multicast mode, wherein the first network equipment group comprises Q first network equipment, and Q is more than or equal to 2.
With reference to the fifth aspect, in a third possible implementation manner of the fifth aspect, the processor is specifically configured to,
and detecting information of the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe, wherein N is a positive integer greater than or equal to 1.
With reference to the third possible implementation manner of the fifth aspect, in a fourth possible implementation manner of the fifth aspect, the processor is specifically configured to,
detecting PCFICH transmitted in the first N OFDM symbols of the first subframe to acquire subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
detecting a PCFICH-like channel transmitted in the first N OFDM symbols of the first subframe to acquire subframe structure information of the first subframe, wherein the PCFICH-like channel is a channel with a similar structure to a PCIFCH but different transmission resource positions;
alternatively, the first and second electrodes may be,
detecting a PHICH or a PHICH-like channel transmitted in the first N OFDM symbols of the first subframe to acquire subframe structure information of the first subframe, wherein the PHICH-like channel is a channel with a resource position different from that of PHICH structure similar transmission;
alternatively, the first and second electrodes may be,
and detecting the PDCCH transmitted in the first N OFDM symbols of the first subframe to obtain the subframe structure information of the first subframe.
With reference to the fourth possible implementation manner of the fifth aspect, in a fifth possible implementation manner of the fifth aspect, the first network device further includes,
a receiver, configured to receive a high-level signaling sent by a second network device, where the high-level signaling includes first indication information for indicating that the first subframe is a fixed configuration subframe or a variable configuration subframe;
accordingly, the processor is particularly adapted to,
if the first subframe is judged to be a fixed configuration subframe according to the first indication information, the first network device detects the PCFICH transmitted in the first N OFDM symbols of the first subframe, and analyzes the PCFICH into the number of symbols occupied by the PDCCH;
if the first subframe is judged to be a variable configuration subframe according to the first indication information, the first network device detects the PCFICH transmitted in the first N OFDM symbols of the first subframe, analyzes the PCFICH into subframe structure information of the first subframe, and fixes the number of symbols occupied by the PDCCH indicated by the PCFICH.
With reference to the fourth possible implementation manner of the fifth aspect, in a sixth possible implementation manner of the fifth aspect, the processor is specifically configured to,
detecting information in DCI in PDCCH common search intervals transmitted in the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
and detecting the scrambling code information of the DCI or the scrambling code information of the CRC in the PDCCH public search interval transmitted in the first N symbols of the first subframe to acquire the subframe structure information of the first subframe.
With reference to the fifth aspect, in a seventh possible implementation manner of the fifth aspect, the processor is specifically configured to,
and detecting the information of the last OFDM symbol of the previous subframe of the first subframe to obtain the subframe structure information of the first subframe.
With reference to the fifth aspect, in an eighth possible implementation manner of the fifth aspect, the processor is specifically configured to,
detecting a PSS channel or a SSS channel or a similar PSS channel or a SSS channel of the first subframe to acquire subframe structure information of the first subframe through related detection, wherein the similar PSS channel is a channel with a structure similar to that of the PSS channel but different transmission resource positions, and the similar SSS channel is a channel with a structure similar to that of the SSS channel but different transmission resource positions.
With reference to the fifth aspect, in a ninth possible implementation manner of the fifth aspect, the processor is specifically configured to,
detecting pilot frequency information of the first subframe to acquire subframe structure information of the first subframe; wherein the pilot information comprises one or more of the following pilots: CRS, CSI-RS, DMRS.
With reference to the ninth possible implementation manner of the fifth aspect, in a tenth possible implementation manner of the fifth aspect, the processor is specifically configured to,
detecting scrambling code information or spreading code information of the pilot frequency information of the first subframe to acquire subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
and detecting pilot frequency information of at least two OFDM symbols of the first subframe to obtain subframe structure information of the first subframe through related detection.
With reference to the fifth aspect, in an eleventh possible implementation manner of the fifth aspect, the processor is specifically configured to,
detecting rank information of the first subframe to acquire subframe structure information of the first subframe, wherein different rank information corresponds to different subframe structures;
alternatively, the first and second electrodes may be,
and detecting RSRP information of the first subframe to acquire structure information of the first subframe, wherein different intervals in which the RSRP information is located correspond to different subframe structures.
In a sixth aspect, there is provided a second network device comprising a transmitter and a processor, wherein,
a transmitter, configured to send subframe structure information of the first subframe to a first network device, so that the first network device obtains the subframe structure information of the first subframe; wherein the subframe structure information of the first subframe is a feature description of the subframe structure of the first subframe that needs to be configured.
With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the subframe structure information includes one or more of the following information: the number of OFDM symbols contained in the subframe, the length of each OFDM symbol, the length of CP of each OFDM symbol, the length of a guard time interval, the length of DwPTS and the length of UPPTS.
With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect,
the subframe structure information is sent to a first network device in a first network device specific signaling form;
alternatively, the first and second electrodes may be,
and the subframe structure information is sent to a first network equipment group in a multicast mode, wherein the first network equipment group comprises Q first network equipment, and Q is more than or equal to 2.
With reference to the sixth aspect, in a third possible implementation manner of the sixth aspect, the processor is specifically configured to,
and carrying the subframe structure information of the first subframe by using the information of the first N OFDM symbols of the first subframe, wherein N is a positive integer greater than or equal to 1.
With reference to the third possible implementation manner of the sixth aspect, in a fourth possible implementation manner of the sixth aspect, the processor is specifically configured to,
carrying the subframe structure information of the first subframe by using a PCFICH transmitted in the first N OFDM symbols of the first subframe;
alternatively, the first and second electrodes may be,
carrying subframe structure information of the first subframe by a PCFICH-like channel transmitted in the first N OFDM symbols of the first subframe, wherein the PCFICH-like channel is a channel with a similar structure to a PCIFCH but different transmission resource positions;
alternatively, the first and second electrodes may be,
carrying subframe structure information of the first subframe by using a PHICH or a PHICH-like channel transmitted in the first N OFDM symbols of the first subframe, wherein the PHICH-like channel is a channel with a resource position different from that of the similar transmission of the PHICH structure;
alternatively, the first and second electrodes may be,
and carrying the subframe structure information of the first subframe by using a PDCCH transmitted in the first N OFDM symbols of the first subframe.
With reference to the fourth possible implementation manner of the sixth aspect, in a fifth possible implementation manner of the sixth aspect, the transmitter is further configured to,
sending a high-level signaling to a first network device, wherein the high-level signaling includes first indication information for indicating that the first subframe is a fixed configuration subframe or a variable configuration subframe;
accordingly, the processor is particularly adapted to,
if the first subframe is a fixed configuration subframe, the PCFICH is used for indicating symbols occupied by the PDCCH;
and if the first subframe is a variable configuration subframe, carrying the subframe structure information of the first subframe by using the PCFICH transmitted in the first N OFDM symbols of the first subframe.
With reference to the fourth possible implementation manner of the sixth aspect, in a sixth possible implementation manner of the sixth aspect, the processor is specifically configured to,
carrying the subframe structure information of the first subframe by using information in DCI (downlink control information) in the PDCCH (physical downlink control channel) common search interval transmitted in the first N OFDM (orthogonal frequency division multiplexing) symbols of the first subframe;
alternatively, the first and second electrodes may be,
and carrying the subframe structure information of the first subframe by using the scrambling code information of the DCI or the scrambling code information of the CRC in the PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe.
With reference to the sixth aspect, in a seventh possible implementation manner of the sixth aspect, the processor is specifically configured to,
and carrying the subframe structure information of the first subframe by using the information of the last symbol of the subframe before the first subframe.
With reference to the sixth aspect, in an eighth possible implementation manner of the sixth aspect, the processor is specifically configured to,
and carrying the subframe structure information of the first subframe by using a PSS channel or a SSS channel or a PSS-like channel or a SSS-like channel of the first subframe, wherein the PSS-like channel is a channel with a structure similar to that of the PSS channel but different transmission resource positions, and the SSS-like channel is a channel with a structure similar to that of the SSS channel but different transmission resource positions.
With reference to the sixth aspect, in a ninth possible implementation manner of the sixth aspect, the processor is specifically configured to,
carrying the subframe structure information of the first subframe by using the pilot frequency information of the first subframe; wherein the pilot information comprises one or more of the following pilots: CRS, CSI-RS, DMRS.
With reference to the ninth possible implementation manner of the sixth aspect, in a tenth possible implementation manner of the sixth aspect, the processor is specifically configured to,
carrying the subframe structure information of the first subframe by using scrambling code information or spreading code information of the pilot frequency information of the first subframe;
alternatively, the first and second electrodes may be,
and carrying the sub-frame structure information of the first sub-frame by using the pilot frequency information of at least two OFDM symbols of the first sub-frame.
The invention provides a method and network equipment for acquiring and configuring a subframe structure, wherein subframe structure information of a first subframe is acquired through first network equipment; and acquiring the subframe structure of the first subframe according to the indication of the subframe structure information of the first subframe. The method and the device realize dynamic acquisition and configuration of the subframe structure, so that the subframe structure is more suitable for the current channel propagation characteristic, the performance of the communication system is improved, and the defects that the subframe structure and the current channel propagation characteristic are low in adaptability due to the use of a fixed subframe structure in the prior art, and the performance of the communication system is reduced are overcome.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1A is a schematic flowchart of a method for obtaining a subframe structure according to an embodiment of the present invention;
fig. 1B is a schematic diagram of a channel scenario according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for transmitting a subframe structure according to an embodiment of the present invention;
fig. 3 is a schematic device structure diagram of a first network device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus of a second network device according to an embodiment of the present invention;
fig. 5 is a schematic device structure diagram of another first network device according to an embodiment of the present invention;
fig. 6 is a schematic device structure diagram of another second network device according to an embodiment of the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the 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 invention.
Example one
An embodiment of the present invention provides a method for acquiring a subframe structure, and referring to fig. 1A, the method may include:
101. the first network equipment acquires subframe structure information of a first subframe;
wherein, the information contained in the subframe structure information of the first subframe is description of the characteristics of the subframe structure of the first subframe, and the subframe structure information may include one or more of the following information: the number of OFDM symbols contained in the subframe, the length of each OFDM symbol, the length of CP of each OFDM symbol, the length of a guard time interval, the length of DwPTS and the length of UPPTS; the information content included in the first subframe structure information depends on the type of the first subframe and the portion of the first subframe that needs to be adjusted, which is not specifically limited in the present invention.
The subframe structure information can be sent to the first network device in a signaling form specific to the first network device; or, the subframe structure information in this signaling packet is for a first network device group, and may be sent to the first network device group in a multicast form, for example, in a first network device group-specific signaling form, for example, in a form similar to DCI format3, 3A in LTE; the first network equipment group comprises Q first network equipment, wherein Q is more than or equal to 2; the sending form of the subframe structure information may be determined according to actual requirements, which is not limited in the present invention.
The method for the first network device to obtain the subframe structure depends on a method for a device communicating with the first network device to transmit the subframe structure, and specifically, the first network device may obtain the subframe structure information of the first subframe by using any one of the following methods corresponding to the method for transmitting the subframe structure:
the method comprises the steps that first network equipment detects information of first N OFDM symbols of a first subframe to obtain subframe structure information of the first subframe, wherein N is a positive integer larger than or equal to 1;
the first network device may specifically detect information of first N OFDM symbols of the first subframe by using any one of the following 4 methods to obtain subframe structure information of the first subframe:
1. the method comprises the steps that first network equipment detects PCFICH transmitted in the first N OFDM symbols of a first subframe to obtain subframe structure information of the first subframe;
when the subframe structure information of the first subframe is carried by the PCFICH transmitted in the first N OFDM symbols of the first subframe, the first network device may detect the PCFICH transmitted in the first N OFDM symbols of the first subframe by any one of the following methods to obtain the subframe structure information of the first subframe:
in the first mode, the size of the PCFICH is 2 bits, and 4 states can be indicated, where the first three states are still used to indicate the number of symbols occupied by the PDCCH in the subframe, and the vacant fourth state can be used to indicate subframe structure information of the first subframe, and then the first network device detects the fourth state of the PCFICH transmitted in the first N OFDM symbols of the first subframe to obtain the subframe structure information of the first subframe.
In a second mode, a first network device receives a high-level signaling sent by a second network device, wherein the high-level signaling comprises first indication information used for indicating that a first subframe is a fixed configuration subframe or a variable configuration subframe;
if the first network device judges that the first subframe is the variable configuration subframe according to the first indication information, the first network device detects the PCFICH transmitted in the first N OFDM symbols of the first subframe, and analyzes the PCFICH into subframe structure information of the first subframe, wherein at the moment, the number of symbols occupied by the PDCCH indicated by the PCFICH is fixed;
and if the first network equipment judges that the first subframe is the fixed configuration subframe according to the first indication information, the PCFICH transmitted in the first N OFDM symbols of the first subframe is analyzed into the number of symbols occupied by the PDCCH.
In the third mode, 4 states of the PCIFCH indicate the number of symbols of the PDCCH and correspond to different subframe structures, that is, different subframe structures can be indicated by different states of the PCIFCH; the first network equipment detects the state of the PCIFCH and can acquire the subframe structure information of the first subframe according to the corresponding relation; the 4 states of the PCIFCH, the number of indicated PDCCH symbols and the corresponding subframe structure may be in a table form, see table 1; of course, the 4 states of the PCIFCH, the number of indicated PDCCH symbols, and the corresponding subframe structure may also take other forms.
TABLE 1
PDCCH state Indicated number of symbols of PDCCH Subframe structure
00 1 First subframe structure
01 2 Second subframe structure
10 3 Third subframe structure
11 4 Fourth subframe structure
It should be noted that table 1 merely shows the correlation between the 4 states of the PCIFCH and the indicated PDCCH symbol number and the corresponding subframe structure in a table form, and the correlation and the content in the correlation between the 4 states of the PCIFCH and the indicated PDCCH symbol number and the corresponding subframe structure may be determined according to actual requirements, which is not limited in the present invention.
2. The first network device detects a channel similar to the PCFICH transmitted in the first N OFDM symbols of the first subframe to acquire subframe structure information of the first subframe, wherein the channel similar to the PCFICH is a channel similar to the PCIFCH structure but with different transmission resource positions.
The information of the PCFICH is coded and modulated to obtain 16 QPSK symbols, and is transmitted in 4 REGs, each REG contains 4 REs, and the starting position of the PCFICH in the frequency domain is obtained according to the cell ID. The new channel used to indicate the subframe structure may also be transmitted using multiple REGs, and may be frequency multiplexed with the PCFICH or transmitted on different OFDM symbols, and the new channel transmitted at different frequency and time domain locations may implicitly indicate different subframe structure information;
the PCFICH-like channel is redefined in the first subframe, a channel having a similar structure to the PCIFCH but a different transmission resource location, for example, the PCFICH-like channel may be transmitted in a second OFDM symbol or a first OFDM symbol of the first subframe at a different location from the PCFICH frequency domain; when the subframe structure information of the first subframe is carried by a channel similar to the PCFICH, the first network device detects the channel similar to the PCFICH of the first subframe to acquire the subframe structure information of the first subframe. It should be noted that, the present invention does not specifically limit the transmission position of the defined channel like the PCFICH.
3. The first network equipment detects a PHICH or a PHICH-like channel transmitted in the first N OFDM symbols of the first subframe to acquire subframe structure information of the first subframe, wherein the PHICH-like channel is a channel with different resource positions similar to the PHICH structure in transmission;
4. the first network equipment detects the PDCCH transmitted in the first N OFDM symbols of the first subframe to acquire the subframe structure information of the first subframe.
When the first network device detects a PDCCH transmitted in first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe, the first network device may detect information in a DCI transmitted in a PDCCH common search interval in the first N OFDM symbols of the first subframe to obtain the subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
the first network equipment detects the scrambling code information of DCI or CRC in the PDCCH public search interval transmitted in the first N symbols of the first subframe to acquire the subframe structure information of the first subframe.
And secondly, the first network equipment detects the information of the last OFDM symbol of the previous subframe of the first subframe to acquire the subframe structure information of the first subframe.
And the first network equipment detects a PSS channel or a SSS channel or a channel similar to the PSS channel or the SSS channel of the first subframe and acquires the subframe structure information of the first subframe through related detection, wherein the channel similar to the PSS channel is a channel with a structure similar to that of the PSS channel but different transmission resource positions, and the channel similar to the SSS channel is a channel with a structure similar to that of the SSS channel but different transmission resource positions.
For example, the subframe configuration information of the first subframe may be obtained by measuring a first channel and a second channel of the first subframe in fig. 1B, for example, the subframe configuration information may be a CP length, where the first channel may transmit one sequence, the second channel may transmit another sequence, and the CP length is obtained by performing correlation detection on the sequence of the first channel and the correlation detection on the second channel; wherein the first channel may be one of a channel of PSS, a channel of SSS, a channel of similar PSS, a channel of SSS, and the second channel may be one of a channel of PSS, a channel of SSS, a channel of similar PSS, a channel of SSS.
The first network equipment detects the pilot frequency information of the first sub-frame to obtain the sub-frame structure information of the first sub-frame; wherein the pilot information may include one or more of the following pilots: CRS, CSI-RS, DMRS.
When the first network device detects the pilot frequency information of the first sub-frame to obtain the sub-frame structure information of the first sub-frame, the first network device can detect the scrambling code information or the spreading code information of the pilot frequency information of the first sub-frame to obtain the sub-frame structure information of the first sub-frame;
or detecting pilot frequency information of at least two OFDM symbols of the first sub-frame, and obtaining sub-frame structure information of the first sub-frame through related detection; for example, the correlation between the sequence of the CRS of the 0 th OFDM symbol and the local sequence at the receiving side may obtain a first correlation peak at the position of T0, the correlation between the sequence of the CRS of the 1 st OFDM symbol and the local sequence at the receiving side may obtain a second correlation peak at the position of T1, the time interval between the two peaks is the length of the OFDM symbol of the first subframe plus the length of the CP, and when the length of the OFDM symbol is fixed, the length of the CP may be calculated.
The first network equipment detects rank information of the first subframe to acquire subframe structure information of the first subframe, wherein different rank information can correspond to different subframe structures;
for example, the first network device may determine the subframe structure according to a rank value of the first subframe; when the rank value is smaller than a first preset threshold, the scattering diameter ratio of the channel is smaller, a first CP is adopted in the first subframe, and when the rank value is larger than the first preset threshold, a second CP can be adopted in the first subframe, wherein the first CP is smaller than the current CP and smaller than the second CP;
it should be noted that, the above example is only an example of a manner in which the first network device detects rank information of the first subframe to obtain subframe structure information of the first subframe, and specific values of the first preset threshold, the first CP and the second CP may be determined according to actual requirements, which is not specifically limited in this embodiment of the present invention.
And a sixth step that the first network equipment detects the RSRP information of the first subframe to acquire the structure information of the first subframe, wherein intervals where different RSRP information is located can correspond to different subframe structures.
For example, the first network device may determine the subframe structure according to the value of RSRP of the first subframe; when the value of the RSRP is larger than a second preset threshold value, the possibility that the channel is an LOS path is high, a third CP is adopted in the first subframe, and when the value of the RSRP is smaller than the second preset threshold value, a fourth CP can be adopted in the first subframe, wherein the third CP is smaller than the current CP and is smaller than the fourth CP;
it should be noted that, the above example is only an example of a manner in which the first network device detects RSRP information of the first subframe to obtain subframe structure information of the first subframe, and specific values of the second preset threshold, the third CP and the fourth CP may be determined according to actual requirements, which is not specifically limited in this embodiment of the present invention.
102. And acquiring the subframe structure of the first subframe according to the indication of the subframe structure information of the first subframe, wherein the subframe structure information of the first subframe is the feature description of the subframe structure of the first subframe.
The information included in the subframe structure information of the first subframe is description of the feature of the subframe structure of the first subframe, and may be different according to the content included in the subframe structure, and according to the indication of the information included in the subframe structure information of the first subframe acquired in step 101, the subframe structure of the first subframe may be acquired.
The subframe structure refers to the number of OFDM symbols contained in a subframe, the length of each OFDM symbol, the length of a CP (cyclic redundancy code) of each OFDM symbol, the length of a guard time interval, the length of a DwPTS (dynamic time partial sequence), the length of a UPPTS (uplink packet time partial sequence), and the like; for different subframe types, the subframe structure may contain different information; for example, for a normal subframe of a Long Term Evolution (LTE) system, a subframe structure may include the number of OFDM symbols included in the subframe, the length of each OFDM symbol, and the length of a CP of each OFDM symbol; for a special subframe of an LTE system, the subframe structure may include the length of a guard time interval, the length of a DwPTS, and the length of a UPPTS; it should be noted that, the specific content of the subframe structure may be specifically determined according to different subframe types, which is not limited in the present invention.
The invention provides a method for obtaining a subframe structure, which comprises the steps of detecting a first subframe through first network equipment to obtain subframe structure information of the first subframe; and acquiring the subframe structure of the first subframe according to the indication of the subframe structure information of the first subframe. The method and the device realize dynamic acquisition and configuration of the subframe structure, so that the subframe structure is more suitable for the current channel propagation characteristic, the performance of the communication system is improved, and the defects that the subframe structure and the current channel propagation characteristic are low in adaptability due to the use of a fixed subframe structure in the prior art, and the performance of the communication system is reduced are overcome.
Example two
The second embodiment of the present invention provides a method for configuring a subframe structure, where before subframe structure information is sent, a subframe structure suitable for a transmission environment is already determined according to the transmission environment. Referring to fig. 2, the method may include:
201. the method includes the steps of sending subframe structure information of a first subframe to first network equipment so that the first network equipment can obtain the subframe structure information of the first subframe, wherein the subframe structure information of the first subframe is the feature description of the subframe structure of the first subframe needing to be configured.
Wherein, the subframe structure information may include one or more of the following information: the number of OFDM symbols contained in the subframe, the length of each OFDM symbol, the length of CP of each OFDM symbol, the length of a guard time interval, the length of DwPTS and the length of UPPTS; the information content included in the first subframe structure information depends on the type of the first subframe and the portion of the first subframe that needs to be adjusted, which is not specifically limited in the present invention.
The subframe structure information can be sent to the first network device in a signaling form specific to the first network device; or, the subframe structure information in this signaling packet is for a first network device group, and may be sent to the first network device group in a multicast form, for example, in a first network device group-specific signaling form, for example, in a form similar to DCI format3, 3A in LTE; the first network equipment group comprises Q first network equipment, wherein Q is more than or equal to 2; the sending form of the subframe structure information may be determined according to actual requirements, which is not limited in the present invention.
It should be noted that, the subframe structure information of the first subframe is sent to the first network device by using different information bearers, and correspondingly, when the first network device detects the first subframe and obtains the subframe structure, the subframe structure information of the first subframe can be obtained from the corresponding information, so as to obtain the subframe structure of the first subframe.
Specifically, the subframe structure information of the first subframe may be sent to the first network device by any one of the following methods:
the first method is to send the subframe structure information of the first subframe to the first network device by using the information bearing of the first N OFDM symbols of the first subframe, wherein N is a positive integer greater than or equal to 1.
The sending of the subframe structure information of the first subframe to the first network device by using the information bearer of the first N OFDM symbols of the first subframe may be implemented by any one of the following 4 manners:
1. sending the subframe structure information of the first subframe to the first network equipment by using a PCFICH bearer transmitted in the first N OFDM symbols of the first subframe;
when the subframe structure information of the first subframe is sent to the first network device by using the PCFICH bearer transmitted in the first N OFDM symbols of the first subframe, the sending the subframe structure information of the first subframe to the first network device by using the PCFICH bearer transmitted in the first N OFDM symbols of the first subframe may include the following steps:
the first mode is that the size of the PCFICH is 2 bits, and 4 states can be indicated, wherein the first three states are still used for indicating the number of symbols occupied by the PDCCH in the subframe, and the vacant fourth state can contain subframe structure information of the first subframe;
a second mode, sending a high-level signaling to the first network device, wherein the high-level signaling includes first indication information for indicating that the first subframe is a fixed configuration subframe or a variable configuration subframe;
if the first indication information indicates that the first subframe is a variable configuration subframe, carrying subframe structure information of the first subframe by using a PCFICH transmitted in the first N OFDM symbols of the first subframe, wherein the number of symbols occupied by a PDCCH (physical downlink control channel) indicated by the PCFICH is fixed;
if the first indication information indicates that the first subframe is a fixed configuration subframe, the PCFICH transmitted in the first N OFDM symbols of the first subframe is still used to indicate the number of symbols occupied by the PDCCH.
The third mode is that 4 states of the PCIFCH indicate the number of symbols of the PDCCH, and correspond to different subframe structures at the same time, and when the PCIFCH is sent, subframe structure information can be sent to the first network equipment through the different states of the PCIFCH; the 4 states of the PCIFCH, the number of indicated PDCCH symbols and the corresponding subframe structure may be in the form of a table, see table 1; of course, the 4 states of the PCIFCH, the number of indicated PDCCH symbols, and the corresponding subframe structure may also take other forms.
2. Sending the subframe structure information of the first subframe to the first network equipment by using a channel bearer similar to a PCFICH (physical control channel) transmitted in the first N OFDM (orthogonal frequency division multiplexing) symbols of the first subframe, wherein the channel similar to the PCFICH is a channel which has a similar structure with a PCIFCH (physical control channel) but different transmission resource positions;
the PCFICH-like channel is a channel redefined in the first subframe, having a similar structure to the PCIFCH but a different transmission resource location, for example, the PCFICH-like channel may be transmitted in a different frequency domain from the PCFICH in the second OFDM symbol or the first OFDM symbol of the first subframe, and the subframe structure information of the first subframe is carried by the PCFICH-like channel. It should be noted that, the present invention is not particularly limited to the transmission position of the defined channel similar to the PCFICH.
3. Sending the subframe structure information of the first subframe to first network equipment by using a PHICH or a channel similar to the PHICH transmitted in the first N OFDM symbols of the first subframe for bearing, wherein the channel similar to the PHICH is a channel with a resource position different from that of the similar transmission of the PHICH structure;
4. and sending the subframe structure information of the first subframe to the first network equipment by using the PDCCH (physical downlink control channel) load transmitted in the first N OFDM symbols of the first subframe.
Specifically, the subframe structure information of the first subframe may be carried and sent to the first network device by using information in DCI transmitted in the first N OFDM symbols of the first subframe in the PDCCH common search interval; or, the subframe structure information of the first subframe is sent to the first network device by using the scrambling code information of the DCI or the scrambling code information of the CRC in the PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe.
And secondly, sending the subframe structure information of the first subframe to the first network equipment by using the information bearing of the last symbol of the previous subframe of the first subframe.
And thirdly, sending the subframe structure information of the first subframe to the first network equipment by using a PSS channel or an SSS channel or a channel similar to the PSS or the SSS channel, wherein the channel similar to the PSS is a channel with a structure similar to that of the PSS channel but with a different transmission resource position, and the channel similar to the SSS channel is a channel with a structure similar to that of the SSS channel but with a different transmission resource position.
The method four, send the subframe structure information of the first subframe to the first network equipment with the pilot frequency information bearing of the first subframe; wherein the pilot information may include one or more of the following pilots: CRS, CSI-RS, DMRS.
Specifically, the subframe structure information of the first subframe may be sent to the first network device by using the scrambling code information or the spreading code information of the pilot information of the first subframe; or, the subframe structure information of the first subframe is sent to the first network device by using the pilot information of at least two OFDM symbols of the first subframe.
In the method for sending a subframe structure provided in the embodiment of the present invention, subframe structure information of a first subframe is sent to a first network device, so that the first network device obtains the subframe structure information of the first subframe, where the subframe structure information of the first subframe is a feature description of a subframe structure of the first subframe that needs to be configured; the method and the device realize dynamic acquisition and configuration of the subframe structure, so that the subframe structure is more suitable for the current channel propagation characteristic, the performance of the communication system is improved, and the defects that the subframe structure and the current channel propagation characteristic are low in adaptability due to the use of a fixed subframe structure in the prior art, and the performance of the communication system is reduced are overcome.
EXAMPLE III
An embodiment of the present invention provides a first network device 30, and referring to fig. 3, the first network device 30 may include:
an obtaining unit 301, configured to detect a first subframe and obtain subframe structure information of the first subframe;
the obtaining unit 301 is further configured to obtain a subframe structure of the first subframe according to the indication of the subframe structure information of the first subframe; wherein the subframe structure information of the first subframe is a characterization of the subframe structure of the first subframe.
Specifically, the subframe structure information includes one or more of the following information: the number of OFDM symbols contained in the subframe, the length of each OFDM symbol, the length of CP of each OFDM symbol, the length of a guard time interval, the length of DwPTS and the length of UPPTS.
Further, the subframe structure information is sent to the first network device in a first network device specific signaling form;
alternatively, the first and second electrodes may be,
and the subframe structure information is sent to a first network equipment group in a multicast mode, wherein the first network equipment group comprises Q first network equipment, and Q is more than or equal to 2.
Further, the obtaining unit 301 may be specifically configured to,
and detecting information of the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe, wherein N is a positive integer greater than or equal to 1.
Optionally, the obtaining unit 301 may be specifically configured to,
detecting PCFICH transmitted in the first N OFDM symbols of the first subframe to acquire subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
detecting channels similar to a PCFICH (physical control channel) transmitted in the first N OFDM (orthogonal frequency division multiplexing) symbols of the first subframe to acquire subframe structure information of the first subframe, wherein the channels similar to the PCFICH are channels which are similar to a PCIFCH (physical control channel) structure but different in transmission resource position;
alternatively, the first and second electrodes may be,
detecting a PHICH or a channel similar to the PHICH transmitted in the first N OFDM symbols of the first subframe to acquire subframe structure information of the first subframe, wherein the channel similar to the PHICH is a channel with a resource position different from that of the similar transmission of the PHICH structure;
alternatively, the first and second electrodes may be,
and detecting the PDCCH transmitted in the first N OFDM symbols of the first subframe to acquire the subframe structure information of the first subframe.
Further, the first network device further comprises,
a receiving unit 302, configured to receive a high-level signaling sent by a second network device, where the high-level signaling includes first indication information for indicating that a first subframe is a fixed configuration subframe or a variable configuration subframe;
accordingly, the obtaining unit 301 may be specifically configured to,
if the first subframe is judged to be a fixed configuration subframe according to the first indication information, the first network equipment detects the PCFICH transmitted in the first N OFDM symbols of the first subframe, and analyzes the PCFICH into the number of symbols occupied by the PDCCH;
if the first subframe is judged to be a variable configuration subframe according to the first indication information, the first network device detects the PCFICH transmitted in the first N OFDM symbols of the first subframe, analyzes the PCFICH into subframe structure information of the first subframe, and fixes the number of symbols occupied by the PDCCH indicated by the PCFICH.
Illustratively, the obtaining unit 301 may be specifically configured to,
detecting information in DCI in PDCCH common search intervals transmitted in the first N OFDM symbols of a first subframe to obtain subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
and detecting the scrambling code information of the DCI or the scrambling code information of the CRC in the PDCCH common search interval transmitted in the first N symbols of the first subframe to acquire the subframe structure information of the first subframe.
Further, the obtaining unit 301 may be specifically configured to,
and detecting the information of the last OFDM symbol of the previous subframe of the first subframe to obtain the subframe structure information of the first subframe.
Further, the obtaining unit 301 may be further specifically configured to,
detecting a PSS channel or a SSS channel or a similar PSS channel or a similar SSS channel of a first subframe to acquire subframe structure information of the first subframe through related detection, wherein the similar PSS channel is a channel with a structure similar to that of the PSS channel but different transmission resource positions, and the similar SSS channel is a channel with a structure similar to that of the SSS channel but different transmission resource positions.
Further, the obtaining unit 301 may be specifically configured to,
detecting pilot frequency information of a first subframe to acquire subframe structure information of the first subframe; wherein the pilot information may include one or more of the following pilots: CRS, CSI-RS, DMRS.
Optionally, the obtaining unit 301 may be specifically configured to,
detecting scrambling code information or spreading code information of pilot frequency information of a first subframe to acquire subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
and detecting pilot frequency information of at least two OFDM symbols of the first sub-frame to obtain sub-frame structure information of the first sub-frame through related detection.
Further, the obtaining unit 301 may be specifically configured to,
detecting rank information of a first subframe to acquire subframe structure information of the first subframe, wherein different rank information can correspond to different subframe structures;
alternatively, the first and second electrodes may be,
and detecting RSRP information of the first subframe to acquire structure information of the first subframe, wherein intervals where different RSRP information is located can correspond to different subframe structures.
The embodiment of the present invention provides a first network device 30, which obtains subframe structure information of a first subframe through the first network device; and acquiring the subframe structure of the first subframe according to the indication of the subframe structure information of the first subframe. The method and the device realize dynamic acquisition and configuration of the subframe structure, so that the subframe structure is more suitable for the current channel propagation characteristic, the performance of the communication system is improved, and the defects that the subframe structure and the current channel propagation characteristic are low in adaptability due to the use of a fixed subframe structure in the prior art, and the performance of the communication system is reduced are overcome.
Example four
An embodiment of the present invention provides a second network device 40, and referring to fig. 4, the second network device 40 may include:
a sending unit 401, configured to send subframe structure information of a first subframe to a first network device, so that the first network device obtains the subframe structure information of the first subframe; the subframe structure information of the first subframe is the feature description of the subframe structure of the first subframe needing to be configured.
Optionally, the subframe structure information may include one or more of the following information: the number of OFDM symbols contained in the subframe, the length of each OFDM symbol, the length of CP of each OFDM symbol, the length of a guard time interval, the length of DwPTS and the length of UPPTS.
Further, the subframe structure information is sent to the first network device in a signaling form specific to the first network device;
alternatively, the first and second electrodes may be,
and the subframe structure information is sent to a first network equipment group in a multicast mode, wherein the first network equipment group comprises Q first network equipment, and Q is more than or equal to 2.
Further, the sending unit 401 may specifically be configured to,
and sending the subframe structure information of the first subframe to the first network equipment by using the information bearing of the first N OFDM symbols of the first subframe, wherein N is a positive integer greater than or equal to 1.
Optionally, the sending unit 401 may be specifically configured to,
sending the subframe structure information of the first subframe to the first network equipment by using a PCFICH bearer transmitted in the first N OFDM symbols of the first subframe;
alternatively, the first and second electrodes may be,
sending the subframe structure information of the first subframe to the first network equipment by using a channel bearer similar to a PCFICH (physical control channel) transmitted in the first N OFDM (orthogonal frequency division multiplexing) symbols of the first subframe, wherein the channel similar to the PCFICH is a channel which has a similar structure with a PCIFCH (physical control channel) but different transmission resource positions;
alternatively, the first and second electrodes may be,
sending the subframe structure information of the first subframe to first network equipment by using a PHICH or a channel similar to the PHICH transmitted in the first N OFDM symbols of the first subframe for bearing, wherein the channel similar to the PHICH is a channel with a resource position different from that of the similar transmission of the PHICH structure;
alternatively, the first and second electrodes may be,
and sending the subframe structure information of the first subframe to the first network equipment by using the PDCCH (physical downlink control channel) load transmitted in the first N OFDM symbols of the first subframe.
Further, the sending unit 401 may also be configured to,
sending a high-level signaling to a first network device, wherein the high-level signaling comprises first indication information used for indicating that a first subframe is a fixed configuration subframe or a variable configuration subframe;
accordingly, the sending unit 401 may be specifically configured to,
if the first subframe is a fixed configuration subframe, the PCFICH is used for indicating symbols occupied by the PDCCH;
and if the first subframe is the variable configuration subframe, sending the subframe structure information of the first subframe to the first network equipment by using the PCFICH bearer transmitted in the first N OFDM symbols of the first subframe.
Optionally, the sending unit 401 may be specifically configured to,
sending the subframe structure information of the first subframe to first network equipment by using information bearing in DCI (downlink control information) in a PDCCH (physical downlink control channel) public search interval transmitted in the first N OFDM (orthogonal frequency division multiplexing) symbols of the first subframe;
alternatively, the first and second electrodes may be,
and sending the subframe structure information of the first subframe to the first network equipment by using the scrambling code information of the DCI or the scrambling code information of the CRC in the PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe.
Further, the sending unit 401 may specifically be configured to,
and sending the subframe structure information of the first subframe to the first network equipment by using the information bearing of the last symbol of the previous subframe of the first subframe.
Further, the sending unit 401 may specifically be configured to,
and sending the subframe structure information of the first subframe to first network equipment by using a PSS channel or a SSS channel or a channel similar to the PSS or the SSS channel of the first subframe for bearing, wherein the channel similar to the PSS is a channel with a structure similar to that of the PSS channel but different transmission resource positions, and the channel similar to the SSS is a channel with a structure similar to that of the SSS channel but different transmission resource positions.
Further, the sending unit 401 may specifically be configured to,
sending the sub-frame structure information of the first sub-frame to the first network equipment by using the pilot frequency information of the first sub-frame; wherein the pilot information comprises one or more of the following pilots: CRS, CSI-RS, DMRS.
Optionally, the sending unit 401 may be specifically configured to,
sending the subframe structure information of the first subframe to the first network equipment by using scrambling code information or spreading code information of pilot frequency information of the first subframe;
alternatively, the first and second electrodes may be,
and sending the sub-frame structure information of the first sub-frame to the first network equipment by using the pilot frequency information of at least two OFDM symbols of the first sub-frame.
The embodiment of the present invention provides a second network device 40, which sends subframe structure information of a first subframe to a first network device, so that the first network device obtains the subframe structure information of the first subframe; the subframe structure information of the first subframe is the feature description of the subframe structure of the first subframe needing to be configured. The method and the device realize dynamic acquisition and configuration of the subframe structure, so that the subframe structure is more suitable for the current channel propagation characteristic, the performance of the communication system is improved, and the defects that the subframe structure and the current channel propagation characteristic are low in adaptability due to the use of a fixed subframe structure in the prior art, and the performance of the communication system is reduced are overcome.
EXAMPLE five
An embodiment of the present invention provides a first network device 30, and referring to fig. 5, the first network device 30 may include:
at least one processor 501, a memory 502, at least one communication bus 503 for enabling connection and intercommunication between these devices, a receiver 504;
the communication bus 503 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus 503 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 5, but this is not intended to represent only one bus or type of bus.
Memory 502 may include both read-only memory and random-access memory, and provides instructions and data to processor 501. A portion of the memory 502 may also include non-volatile row random access memory (NVRAM).
The processor 501 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present invention.
The processor 501 may be configured to obtain subframe structure information of a first subframe;
the processor 501 may be further configured to obtain a subframe structure of the first subframe according to the indication of the subframe structure information of the first subframe; wherein the subframe structure information of the first subframe is a feature description of the subframe structure of the first subframe.
Specifically, the subframe structure information includes one or more of the following information: the number of OFDM symbols contained in the subframe, the length of each OFDM symbol, the length of CP of each OFDM symbol, the length of a guard time interval, the length of DwPTS and the length of UPPTS.
Further, the subframe structure information is sent to the first network device in a signaling form specific to the first network device;
alternatively, the first and second electrodes may be,
and the subframe structure information is sent to a first network equipment group in a multicast mode, wherein the first network equipment group comprises Q first network equipment, and Q is more than or equal to 2.
Further, the processor 501 may be specifically configured to,
and detecting information of the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe, wherein N is a positive integer greater than or equal to 1.
Optionally, the processor 501 may be specifically configured to,
detecting PCFICH transmitted in the first N OFDM symbols of the first subframe to acquire subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
detecting channels similar to a PCFICH (physical control channel) transmitted in the first N OFDM (orthogonal frequency division multiplexing) symbols of the first subframe to acquire subframe structure information of the first subframe, wherein the channels similar to the PCFICH are channels which are similar to a PCIFCH (physical control channel) structure but different in transmission resource position;
alternatively, the first and second electrodes may be,
detecting a PHICH or a channel similar to the PHICH transmitted in the first N OFDM symbols of the first subframe to acquire subframe structure information of the first subframe, wherein the channel similar to the PHICH is a channel with a resource position different from that of the similar transmission of the PHICH structure;
alternatively, the first and second electrodes may be,
and detecting the PDCCH transmitted in the first N OFDM symbols of the first subframe to acquire the subframe structure information of the first subframe.
Further, the receiver 504 is configured to receive a high-level signaling sent by the second network device, where the high-level signaling includes first indication information for indicating that the first subframe is a fixed configuration subframe or a variable configuration subframe;
accordingly, the processor 501 may be specifically configured to,
if the first subframe is determined to be a fixed configuration subframe according to the first indication information received by the receiver 504, the first network device detects the PCFICH transmitted in the first N OFDM symbols of the first subframe, and resolves the PCFICH into the number of symbols occupied by the PDCCH;
if the first subframe is determined to be a variable configuration subframe according to the first indication information received by the receiver 504, the first network device detects the PCFICH transmitted in the first N OFDM symbols of the first subframe, and analyzes the PCFICH into subframe structure information of the first subframe, where the number of symbols occupied by the PDCCH indicated by the PCFICH is fixed.
Illustratively, the processor 501 may be specifically adapted to,
detecting information in DCI in PDCCH common search intervals transmitted in the first N OFDM symbols of a first subframe to obtain subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
and detecting the scrambling code information of the DCI or the scrambling code information of the CRC in the PDCCH common search interval transmitted in the first N symbols of the first subframe to acquire the subframe structure information of the first subframe.
Further, the processor 501 may be specifically configured to,
and detecting the information of the last OFDM symbol of the previous subframe of the first subframe to obtain the subframe structure information of the first subframe.
Further, the processor 501 may be specifically configured to,
detecting a PSS channel or a SSS channel or a similar PSS channel or a similar SSS channel of a first subframe to acquire subframe structure information of the first subframe through related detection, wherein the similar PSS channel is a channel with a structure similar to that of the PSS channel but different transmission resource positions, and the similar SSS channel is a channel with a structure similar to that of the SSS channel but different transmission resource positions.
Further, the processor 501 may be specifically configured to,
detecting pilot frequency information of a first subframe to acquire subframe structure information of the first subframe; wherein the pilot information may include one or more of the following pilots: CRS, CSI-RS, DMRS.
Optionally, the processor 501 may be specifically configured to,
detecting scrambling code information or spreading code information of pilot frequency information of a first subframe to acquire subframe structure information of the first subframe;
alternatively, the first and second electrodes may be,
and detecting pilot frequency information of at least two OFDM symbols of the first sub-frame to obtain sub-frame structure information of the first sub-frame through related detection.
Further, the processor 501 may be specifically configured to,
detecting rank information of a first subframe to acquire subframe structure information of the first subframe, wherein different rank information can correspond to different subframe structures;
alternatively, the first and second electrodes may be,
and detecting RSRP information of the first subframe to acquire structure information of the first subframe, wherein intervals where different RSRP information is located can correspond to different subframe structures.
The embodiment of the present invention provides a first network device 30, which obtains subframe structure information of a first subframe through the first network device; and acquiring the subframe structure of the first subframe according to the indication of the subframe structure information of the first subframe. The method and the device realize dynamic acquisition and configuration of the subframe structure, so that the subframe structure is more suitable for the current channel propagation characteristic, the performance of the communication system is improved, and the defects that the subframe structure and the current channel propagation characteristic are low in adaptability due to the use of a fixed subframe structure in the prior art, and the performance of the communication system is reduced are overcome.
EXAMPLE six
An embodiment of the present invention provides a second network device 40, and referring to fig. 6, the second network device 40 may include:
at least one processor 601, a memory 602, at least one communication bus 603 for enabling connection and intercommunication between these devices, a transmitter 604;
the communication bus 603 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus 603 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 6, but this is not intended to represent only one bus or type of bus.
The memory 602 may include both read-only memory and random access memory, and provides instructions and data to the processor 601. A portion of the memory 602 may also include non-volatile row random access memory (NVRAM).
Processor 601 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present invention.
The transmitter 604 may be configured to transmit subframe structure information of a first subframe to a first network device, so that the first network device obtains the subframe structure information of the first subframe; the subframe structure information of the first subframe is the feature description of the subframe structure of the first subframe needing to be configured.
Optionally, the subframe structure information may include one or more of the following information: the number of OFDM symbols contained in the subframe, the length of each OFDM symbol, the length of CP of each OFDM symbol, the length of a guard time interval, the length of DwPTS and the length of UPPTS.
Further, the subframe structure information is sent to the first network device in a signaling form specific to the first network device;
alternatively, the first and second electrodes may be,
and the subframe structure information is sent to a first network equipment group in a multicast mode, wherein the first network equipment group comprises Q first network equipment, and Q is more than or equal to 2.
Further, the processor 601 may be specifically configured to,
and carrying the subframe structure information of the first subframe by using the information of the first N OFDM symbols of the first subframe, wherein N is a positive integer greater than or equal to 1.
Optionally, the processor 601 may be specifically configured to,
carrying the subframe structure information of the first subframe by using a PCFICH transmitted in the first N OFDM symbols of the first subframe;
alternatively, the first and second electrodes may be,
carrying the subframe structure information of the first subframe by using a channel similar to a PCFICH transmitted in the first N OFDM symbols of the first subframe, wherein the channel similar to the PCFICH is a channel which has a similar structure with a PCIFCH but different transmission resource positions;
alternatively, the first and second electrodes may be,
carrying the subframe structure information of the first subframe by using a PHICH or a PHICH-like channel transmitted in the first N OFDM symbols of the first subframe, wherein the PHICH-like channel is a channel with different resource positions similar to the PHICH structure;
alternatively, the first and second electrodes may be,
and carrying the subframe structure information of the first subframe by using a PDCCH transmitted in the first N OFDM symbols of the first subframe.
Further, transmitter 604 may also be used to,
sending a high-level signaling to a first network device, wherein the high-level signaling comprises first indication information used for indicating that the first subframe is a fixed configuration subframe or a variable configuration subframe;
accordingly, the processor 601 is specifically configured to,
if the first subframe is a fixed configuration subframe, the PCFICH is used for indicating symbols occupied by the PDCCH;
and if the first subframe is the variable configuration subframe, carrying the subframe structure information of the first subframe by using the PCFICH transmitted in the first N OFDM symbols of the first subframe.
Optionally, the processor 601 may be specifically configured to,
carrying the subframe structure information of the first subframe by using the information in DCI (downlink control information) in a PDCCH (physical downlink control channel) public search interval transmitted in the first N OFDM (orthogonal frequency division multiplexing) symbols of the first subframe;
alternatively, the first and second electrodes may be,
and carrying the subframe structure information of the first subframe by using the scrambling code information of DCI (Downlink control information) or CRC (cyclic redundancy check) scrambling code information in the PDCCH (physical downlink control channel) public search interval transmitted in the first N OFDM (orthogonal frequency division multiplexing) symbols of the first subframe.
Further, the processor 601 may be specifically configured to,
and carrying the subframe structure information of the first subframe by using the information of the last symbol of the previous subframe of the first subframe.
Further, the processor 601 may be specifically configured to,
and carrying the subframe structure information of the first subframe by using a PSS channel or a SSS channel or a PSS-like channel or a SSS-like channel of the first subframe, wherein the PSS-like channel is a channel with a structure similar to that of the PSS channel but different transmission resource positions, and the SSS-like channel is a channel with a structure similar to that of the SSS channel but different transmission resource positions.
Further, the processor 601 may be specifically configured to,
carrying the sub-frame structure information of the first sub-frame by using the pilot frequency information of the first sub-frame; wherein the pilot information comprises one or more of the following pilots: CRS, CSI-RS, DMRS.
Optionally, the processor 601 may be specifically configured to,
carrying the subframe structure information of the first subframe by using scrambling code information or spreading code information of pilot frequency information of the first subframe;
alternatively, the first and second electrodes may be,
and carrying the sub-frame structure information of the first sub-frame by using the pilot frequency information of at least two OFDM symbols of the first sub-frame.
The embodiment of the present invention provides a second network device 40, which sends subframe structure information of a first subframe to a first network device, so that the first network device obtains the subframe structure information of the first subframe; the subframe structure information of the first subframe is the feature description of the subframe structure of the first subframe needing to be configured. The method and the device realize dynamic acquisition and configuration of the subframe structure, so that the subframe structure is more suitable for the current channel propagation characteristic, the performance of the communication system is improved, and the defects that the subframe structure and the current channel propagation characteristic are low in adaptability due to the use of a fixed subframe structure in the prior art, and the performance of the communication system is reduced are overcome.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components 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 of some interfaces, devices or units, and may be an electric or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units 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 units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (12)

1. A method for obtaining a subframe structure, comprising:
a first network device receives a high-level signaling sent by a second network device, wherein the high-level signaling comprises first indication information;
the first network equipment determines a first subframe as a fixed configuration subframe or a variable configuration subframe according to the first indication information;
if the first subframe is a variable configuration subframe, the first network device receives a first signaling sent by the second network device at the first subframe, where the first signaling includes subframe structure information of the first subframe, the first signaling is in a signaling specific to the first network device or a signaling specific to a first network device group, the first network device group includes the first network device, the subframe structure information of the first subframe is a feature description of a subframe structure of the first subframe, and N is a positive integer greater than or equal to 1;
and the first network equipment acquires the subframe structure of the first subframe according to the indication of the subframe structure information of the first subframe.
2. The method of claim 1, wherein the subframe structure information comprises one or more of the following information: the method comprises the following steps of counting Orthogonal Frequency Division Multiplexing (OFDM) symbols contained in a subframe, the length of each OFDM symbol, the length of a Cyclic Prefix (CP) of each OFDM symbol, the length of a guard time interval, the length of a downlink time slot contained in the subframe and the length of an uplink time slot contained in the subframe.
3. The method of claim 1 or 2, wherein the first network device receives the first signaling sent by the second network device in the first subframe, and comprises:
and the first network equipment detects a physical downlink control channel PDCCH transmitted in the first N orthogonal frequency division multiplexing OFDM symbols of the first subframe.
4. The method of claim 3, wherein the detecting, by the first network device, the Physical Downlink Control Channel (PDCCH) transmitted in the first N OFDM symbols of the first subframe comprises:
and the first network equipment detects downlink control information DCI in a PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe.
5. A method of configuring a subframe structure, comprising:
sending a high-level signaling to a first network device, wherein the high-level signaling comprises first indication information used for indicating that a first subframe is a fixed configuration subframe or a variable configuration subframe;
if the first subframe is a variable configuration subframe, sending a first signaling to the first network device in the first subframe, where the first signaling includes subframe structure information of the first subframe, the first signaling is in a signaling specific to the first network device or a signaling specific to the first network device group, the first network device group includes the first network device, the subframe structure information of the first subframe is a feature description of a subframe structure of the first subframe that needs to be configured, and N is a positive integer greater than or equal to 1.
6. The method of claim 5, wherein the subframe structure information comprises one or more of the following information: the method comprises the following steps of counting Orthogonal Frequency Division Multiplexing (OFDM) symbols contained in a subframe, the length of each OFDM symbol, the length of a Cyclic Prefix (CP) of each OFDM symbol, the length of a guard time interval, the length of a downlink time slot contained in the subframe and the length of an uplink time slot contained in the subframe.
7. The method of claim 5 or 6, wherein the sending the first signaling to the first network device in the first subframe comprises:
and sending the first signaling to first network equipment by using a Physical Downlink Control Channel (PDCCH) transmitted in the first N Orthogonal Frequency Division Multiplexing (OFDM) symbols of the first subframe.
8. The method of configuring the subframe structure of claim 7 wherein the Physical Downlink Control Channel (PDCCH) transmitted in the first N Orthogonal Frequency Division Multiplexing (OFDM) symbols of the first subframe transmits the first signaling to a first network device, comprising,
and sending Downlink Control Information (DCI) to first network equipment in the PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe.
9. A network device comprising a processor coupled to a memory and reading and executing instructions stored in the memory to cause the network device to implement the method of any of claims 1-4.
10. A network device comprising a processor coupled to a memory and reading and executing instructions stored in the memory to cause the network device to implement the method of any of claims 5-8.
11. A computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to implement the method of any one of claims 1-8.
12. A communication system comprising a network device according to claim 9 and a second network device according to claim 10.
CN201911266267.4A 2013-12-17 2013-12-17 Method and network device for acquiring and configuring subframe structure Active CN111163025B (en)

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