CN111294179B - Subframe receiving method and device, storage medium and user terminal - Google Patents
Subframe receiving method and device, storage medium and user terminal Download PDFInfo
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- CN111294179B CN111294179B CN201910080142.6A CN201910080142A CN111294179B CN 111294179 B CN111294179 B CN 111294179B CN 201910080142 A CN201910080142 A CN 201910080142A CN 111294179 B CN111294179 B CN 111294179B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
A subframe receiving method and device, a storage medium and a user terminal are provided, and the method can include: receiving at least a portion of a control region of the subframe, the subframe including a control region and a data region, and decoding the received at least a portion of the control region to determine whether DCI is included; in response to not including the DCI in the subframe, turning off reception of at least a portion of a data region of the subframe. The scheme of the invention can effectively reduce power consumption.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a subframe receiving method and apparatus, a storage medium, and a user terminal.
Background
In the Long Term Evolution (Long Term Evolution, LTE)/LTE Evolution version (LTE-Advanced, LTE-a), power consumption optimization of a User Equipment (UE) in a connected state is very important, and each operator sets a strict power consumption standard, and for Voice over Long Term Evolution (Voice over Long Term Evolution, LTE), a corresponding index is given by terminal power consumption under data download; and with the progress of chip technology and the maturity of terminal technology, the power consumption index is in a further decline trend to promote the experience degree of users in actual use.
For a Downlink subframe, there are situations where the subframe contains Downlink Control Information (DCI) and the subframe does not contain DCI, and at present, only the situation where the subframe contains DCI is specified, that is, whether to decode a data region of the subframe is determined according to Information whether a Physical Downlink Control Channel (PDCCH) carries valid DCI.
However, in the prior art, there is no provision for not including DCI in a subframe, and the UE usually keeps downlink reception on. However, when there is no DCI, the UE does not need to process the data region of the subframe, which may result in wasted power consumption for receiving the data region of the subframe.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a subframe receiving method and device, a storage medium and a user terminal.
To solve the above technical problem, an embodiment of the present invention provides a subframe receiving method, including the following steps: receiving at least a portion of a control region of the subframe, the subframe including a control region and a data region, and decoding the received at least a portion of the control region to determine whether DCI is included; in response to the subframe not containing the DCI, turning off reception of at least a portion of a data region of the subframe; wherein the subframe is used for PDSCH channel coding.
Optionally, the subframe receiving method further includes: determining a plurality of CRS pilot positions of the subframe, a portion of the CRS pilot positions being located within the control region and another portion being located within the data region; and at least one part of CRS pilot frequency positions in the data area, turning off the signal detection function of the subframe.
Optionally, the data region includes N CRS pilot positions; turning off the signal detection function of the subframe at least a portion of CRS pilot locations within the data region comprises: closing PDCCH signal detection functions corresponding to the pilot frequency positions of the n CRSs according to the time sequence; wherein N is a positive integer, and N is more than or equal to 1 and less than or equal to N.
Optionally, an RFIC controller or an RFFEM controller is used to turn off the signal detection function of the sub-frame.
Optionally, turning off reception of at least a portion of the data region of the subframe comprises: starting to receive the data area of the subframe within a preset time length before the ending time of the data area of the subframe; and the preset duration is less than the duration of the data area.
To solve the above technical problem, an embodiment of the present invention provides a subframe receiving apparatus, including: a reception determination module adapted to receive at least a portion of a control region of the subframe and decode the received at least a portion of the control region to determine whether DCI is included, the subframe including a control region and a data region; a close receiving module adapted to close receiving a data region of the subframe in response to the subframe not containing the DCI; wherein the subframe is used for PDSCH channel coding.
Optionally, the subframe receiving apparatus further includes: a position determination module adapted to determine a plurality of CRS pilot positions of the subframe, a portion of the CRS pilot positions being located within the control region and another portion being located within the data region; and the closing detection module is suitable for closing the signal detection function of the subframe at least one part of CRS pilot frequency positions in the data area.
Optionally, the data region includes N CRS pilot positions; the shutdown detection module includes: the closing detection submodule is suitable for closing PDCCH signal detection functions corresponding to the n CRS pilot frequency positions according to a time sequence; wherein N is a positive integer, and N is more than or equal to 1 and less than or equal to N.
In order to solve the above technical problem, an embodiment of the present invention provides a storage medium, on which computer instructions are stored, and the computer instructions execute the steps of the subframe receiving method when running.
In order to solve the above technical problem, an embodiment of the present invention provides a terminal, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the subframe receiving method when executing the computer instructions.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, the subframe used for PDSCH channel decoding responds to that the subframe does not contain the DCI, and the reception of the data area of the subframe is closed.
Further, in the embodiment of the present invention, the signal detection function of the subframe may be turned off at least a part of CRS pilot positions in the data region, and compared with the prior art in which the signal detection function is turned on at all CRS pilot positions, the scheme of the embodiment of the present invention may effectively reduce detection power consumption.
Furthermore, in the embodiment of the present invention, the PDCCH signal detection functions corresponding to the n CRS pilot positions are turned off according to the time sequence, which is helpful to better maintain the accuracy of channel detection.
Further, in the embodiment of the present invention, the receiving of the data area of the subframe is started for a preset duration before the end time of the data area of the subframe, which is helpful for preparing for receiving the next subframe by starting in advance, so that the data of the control area of the next subframe can be completely received.
Drawings
Fig. 1 is a schematic diagram of a working flow of a downlink PDSCH traffic channel in the prior art;
fig. 2 is a schematic diagram of an operation scenario of a downlink PDSCH traffic channel in the prior art;
fig. 3 is a schematic diagram of an operating principle of a downlink CDRX in the prior art;
fig. 4 is a schematic diagram of a working scenario of a subframe receiving method in the prior art;
fig. 5 is a flowchart of a subframe receiving method according to an embodiment of the present invention;
fig. 6 is a partial flowchart of another subframe receiving method according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a working scenario of another subframe receiving method according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a working scenario of another subframe receiving method according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a subframe receiving apparatus according to an embodiment of the present invention.
Detailed Description
As described above, in LTE/LTE-a, power consumption optimization of a UE in a connected state is very important. Specifically, the factors determining the power consumption are more, and the scheduling rate of the uplink and downlink services, and the power consumption of the RF and baseband part processing are all important factors.
With reference to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a working flow of a downlink PDSCH traffic channel in the prior art; fig. 2 is a schematic diagram of an operating scenario of a downlink PDSCH traffic channel in the prior art.
For LTE UE, after entering a connected state, it needs to perform PCFICH processing 11 in all possible downlink subframes, where the PCFICH processing may also be referred to as CFI decoding, and specifically, determine Control Format Indicator (CFI) information of a Physical Control Format Indicator Channel (PCFICH) of SYMBOL 0(SYMBOL 0).
Then, according to the result of the PCFICH processing, PDCCH processing 12 is performed to obtain PDCCH demodulation related parameters, and then Physical Downlink Shared Channel (PDSCH) processing 13 is performed to decode the received Control Region (Control Region) a signal PDCCH.
Further, as shown in fig. 2, the UE may determine whether to decode the subsequent data region B according to whether the PDCCH carries the information of the valid DCI.
The inventor of the present invention has found, through research, that in the prior art, since the PDCCH is dynamically scheduled, a subframe inevitably starts downlink reception, including a radio frequency Front-End (RFFEM), a Radio Frequency Integrated Circuit (RFIC), and a baseband-related signal processing module. Due to the delay effect of PDCCH decoding, the time length of Data reception enters into the Data Region (Data Region) B, and if the Data in the Data Region B is not required to be processed subsequently, power consumption is wasted, and the waste degree depends on how many signals which are not required to be processed are received. It should be noted that, in the protocol version after R11, a manner of enhancing an Enhanced Physical Downlink Control Channel (EPDCCH) is added, and there is a case that Control information is located in the data area B, which is not limited in this embodiment of the present invention.
Referring to fig. 3, fig. 3 is a schematic diagram of an operating principle of a downlink CDRX in the prior art.
In the existing LTE protocol, for the detection of PDCCH dynamic scheduling, power consumption may be reduced by a Connected Discontinuous Reception (CDRX) mode.
Specifically, for a terminal in CDRX, in one DRX cycle L, the terminal may be divided into an active period (On Duration) C and a dormant period (Opportunity for DRX) D, and in the active period C, the UE does not need to receive an uplink and downlink control information indication sent by the network, thereby saving power consumption.
More specifically, the network side may notify the UE through Radio Resource Control Connection Reconfiguration (RRC Connection Reconfiguration) or RRC Connection Setup (Connection Setup), and perform "snooze" or "deep sleep" according to the relevant parameters. The protocol distinguishes different subframe types according to the relevant parameters and the DRX period and the retransmission processing of the relevant Hybrid Automatic Repeat Request (HARQ), and closes the receiving in the dormant period (Opportunity for DRX) D.
Referring to fig. 4, fig. 4 is a schematic diagram of an operation scenario of a subframe receiving method in the prior art.
Specifically, the subframe includes a control region and a data region, and the length thereof is 1 ms. In the prior art, there are situations where a subframe includes DCI and a subframe does not include DCI, and at present, only the situation where a subframe includes DCI is defined, and there is no provision for the situation where a subframe does not include DCI, so that the UE usually keeps downlink reception on. That is, the state of RF reception shown in fig. 4 continues to be the on state.
The inventor of the present invention has found through research that, when the UE decodes the data in the control region after receiving the control region of the subframe, there may be a case without DCI, and at this time, the UE does not need to process the data region of the subframe, that is, the UE wastes power for receiving the data region of the subframe.
Further, the inventors of the present invention have studied and found that a Signal detection function exists during the subframe reception process of the UE, and specifically, the Signal detection function may be turned on intermittently according to a Cell Reference Signal (CRS) pilot position, for example, at symbol0, symbol 4, symbol 7, and symbol 11, as shown in fig. 4.
However, turning on the signal detection function at all CRS pilot positions also results in higher power consumption.
In the embodiment of the invention, the subframe used for PDSCH channel decoding responds to that the subframe does not contain the DCI, and the reception of the data area of the subframe is closed.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 5, fig. 5 is a flowchart of a subframe receiving method according to an embodiment of the present invention. The subframe receiving method may be used for a user terminal, and may include steps S51 to S52:
step S51: receiving at least a portion of a control region of the subframe, the subframe including a control region and a data region, and decoding the received at least a portion of the control region to determine whether DCI is included;
step S52: in response to the subframe not including the DCI, turning off reception of at least a portion of a data region of the subframe.
Wherein the subframe is used for PDSCH channel coding.
In the specific implementation of step S51, the subframe may be used for PDSCH channel decoding, so that in other scenarios where signal reception needs to be continuously maintained, the reception of the data region of the subframe is prevented from being turned off due to the scheme of the embodiment of the present invention.
The other scenes that need to keep signal reception continuously may be, for example, EPDCCH, Cell Search (Cell Search), Intra-Freq Meas (Intra-Freq Meas), Multicast/Multicast Single Frequency Network (MBSFN), and the like.
In particular implementations, the UE may determine whether DCI is included by receiving at least a portion of a control region of the subframe and decoding the received at least a portion of the control region.
It is to be understood that when the DCI is not included in the subframe, the data region of the subframe does not need to be decoded.
In a specific implementation of step S52, in response to the subframe not including the DCI, turning off reception of at least a portion of a data region of the subframe.
In a specific implementation, since the UE decodes the received data while receiving the subframe, and since the PDCCH decoding has a delay effect, in an embodiment of the present invention, when it is determined that the subframe does not include the DCI, there may be a case where a part of a data region of the subframe is already received, and at this time, the reception of the remaining part of the data region may be turned off; in another specific implementation manner of the embodiment of the present invention, when it is determined that the subframe does not include the DCI, only data of the control region may be received, and a part of the data region is not yet received, and at this time, reception of all parts of the data region of the subframe may be turned off.
In the embodiment of the present invention, the specific closing manner is not limited, and for example, a switch or a controller may be used to close the reception of at least a portion of the data region of the subframe.
In the embodiment of the present invention, by responding to that the subframe does not include the DCI for PDSCH channel decoding, the subframe closes reception of the data region of the subframe, and compared with the prior art in which downlink reception is kept on regardless of whether the subframe includes the DCI or not, by using the scheme of the embodiment of the present invention, subsequent RF reception of the subframe can be effectively closed, thereby reducing power consumption for subframe reception, and particularly, power consumption can be more effectively reduced for scenarios where data scheduling such as VOLTE is relatively sparse.
Referring to fig. 6, fig. 6 is a partial flowchart of another subframe receiving method according to an embodiment of the present invention. The another subframe reception method may be used for a UE, and may include steps S51 to S52 shown in fig. 5, and may further include steps S61 to S62:
step S61: determining a plurality of CRS pilot positions of the subframe, a portion of the CRS pilot positions being located within the control region and another portion being located within the data region.
Step S62: and at least one part of CRS pilot frequency positions in the data area, turning off the signal detection function of the subframe.
In the implementation of step S61, the UE may first determine a plurality of CRS pilot positions of the subframe, such as symbol0, symbol 4, symbol 7, and symbol 11, and then usually symbol0 would be located in the control region and symbol 4, symbol 7, and symbol 11 would be located in the data region.
In the specific implementation of step S62, the UE needs to reserve the signal detection function of the subframe in the control region, and turn off some or all of the signal detection function in the data region to reduce power consumption.
In the embodiment of the invention, the signal detection function of the subframe can be closed at least one part of CRS pilot frequency positions in the data area, and compared with the prior art that the signal detection function is opened at all CRS pilot frequency positions, the scheme of the embodiment of the invention can effectively reduce the detection power consumption.
Further, the step of turning off the signal detection function of the subframe at least a part of CRS pilot positions in the data region may include: closing PDCCH signal detection functions corresponding to the n CRS pilot frequency positions according to the time sequence; wherein N is a positive integer, and N is more than or equal to 1 and less than or equal to N.
The data region includes N CRS pilot positions, for example, when the CRS pilot positions in the data region are symbol 4, symbol 7, and symbol 11, N is 3.
Specifically, taking CRS pilot positions in the data region as symbol 4, symbol 7, and symbol 11 as an example, the signal detection function corresponding to symbol 11 may be turned off, that is, the PDCCH signal detection function corresponding to the next CRS pilot position is turned off; the signal detection functions corresponding to the symbol 7 and the symbol 11 can also be turned off, that is, the PDCCH signal detection functions corresponding to the pilot positions of the two CRS are turned off; the signal detection function corresponding to symbol 4, symbol 7, and symbol 11, that is, the PDCCH signal detection function corresponding to the last 3 CRS pilot positions may also be turned off.
Referring to fig. 7, fig. 7 is a schematic view of a working scenario of another subframe receiving method according to an embodiment of the present invention.
Specifically, the UE may, in response to that the subframe does not include the DCI, turn off RF reception for at least a portion of a data region of the subframe, and may also turn off a signal detection function of the subframe at least a portion of CRS pilot positions in the data region, as shown in fig. 7, turn off PDCCH signal detection functions corresponding to last 3 CRS pilot positions in a time sequence.
Further, the step of turning off reception of at least a portion of the data region of the subframe may comprise: starting to receive the data area of the subframe within a preset time length before the data area end time of the subframe; and the preset duration is less than the duration of the data area.
Referring to fig. 8, fig. 8 is a schematic view of a working scenario of another subframe receiving method according to an embodiment of the present invention. In the still another subframe receiving method, the receiving of the data region of the subframe may be started in advance by a preset duration from the end time of the data region of the subframe, that is, a preparation may be made in advance for receiving data of a next subframe.
In the embodiment of the present invention, the receiving of the data area of the subframe is started for a preset duration before the end time of the data area of the subframe, which is helpful for preparing for receiving the next subframe by starting in advance, so that the data of the control area of the next subframe can be completely received.
Further, a Radio Frequency Integrated Circuit (RFIC) controller or a Radio Frequency Front End Module (RFFEM) controller may be employed to turn off the signal detection function of the subframe.
In a specific implementation, the RFIC controller or the RFFEM controller may be used to issue a Command prompt (CMD) to perform precise timing control on the behavior of the RFIC and the RFFEM according to a certain timing sequence.
It should be noted that the signal detection function of the subframe may be closed by using a conventional hardware entity of an RFIC controller or an RFFEM controller, may also be implemented by using software, and may also be implemented by combining software and a hardware entity.
More specifically, two sets of cmd sequences may be prearranged, and then according to the result of DCI decoding, execution of the cmd sequence is skipped from the normal transceiving sequence to the cmd sequence that is turned off in advance in RFIC/RFFEM, and the cmd skipping logic of the module triggers, and then execution can be continued from the cmd sequence that is turned off in advance back to the normal sequence.
Referring to fig. 9, fig. 9 is a schematic structural diagram of a subframe receiving apparatus according to an embodiment of the present invention. The subframe receiving apparatus may be used for a user terminal, and may include:
a reception determining module 91, adapted to receive at least a portion of a control region of the subframe, and decode the received at least a portion of the control region to determine whether DCI is included, the subframe including the control region and a data region;
a close receiving module 92, adapted to close receiving the data region of the subframe in response to the subframe not containing the DCI; wherein the subframe is used for PDSCH channel coding.
The subframe reception apparatus may further include:
a position determining module 93 adapted to determine a plurality of CRS pilot positions of the subframe, a portion of the CRS pilot positions being located within the control region and another portion being located within the data region;
a turn-off detection module 94 adapted to turn off the signal detection function of the subframe at least a portion of CRS pilot positions in the data region.
Wherein, the data region may include N CRS pilot locations; the shutdown detection module 94 may include: a closing detection submodule (not shown) adapted to close PDCCH signal detection functions corresponding to n CRS pilot positions according to a time sequence; wherein N is a positive integer, and N is more than or equal to 1 and less than or equal to N.
It should be noted that, in a specific implementation, a pre-control switch (for example, may be named as a DCI dynamic optimization sub-frame level control switch) may be further configured to avoid turning off reception of a data region of the sub-frame in a scenario where signal reception needs to be continuously maintained, for example, in a scenario of EPDCCH, Cell Search, Intra-Freq Meas, MBSFN, and the like.
In a specific implementation, the step of decoding at least a part of the received control region may be implemented by a DCI decoding module, and specifically, the DCI decoding module may perform blind detection on a PDCCH that needs to be detected in the current subframe of the UE, and obtain information about whether downlink DCI is valid.
In a specific implementation, a signal detection feedback module (for example, may be named as a downlink signal detection and tracking module) may be further configured to track downlink signal quality, time zone (Timing Loop), and frequency value (Freq) to determine which CRS pilot positions in the data zone, and turn off the signal detection function of the subframe, so as to obtain a better effect.
In the embodiment of the present invention, by responding to that the subframe does not include the DCI for PDSCH channel decoding, the subframe closes reception of the data region of the subframe, and compared with the prior art in which downlink reception is kept on regardless of whether the subframe includes the DCI or not, by using the scheme of the embodiment of the present invention, subsequent RF reception of the subframe can be effectively closed, thereby reducing power consumption for subframe reception, and particularly, power consumption can be more effectively reduced for scenarios where data scheduling such as VOLTE is relatively sparse.
For the principle, specific implementation and beneficial effects of the subframe receiving apparatus, please refer to the related description of the subframe receiving method shown in fig. 5 to fig. 8, which is not repeated herein.
Embodiments of the present invention further provide a storage medium having stored thereon computer instructions, which execute the steps shown in fig. 5 to 8 regarding the subframe receiving method when the computer instructions are executed. The storage medium may be a computer-readable storage medium, and may include, for example, non-volatile (non-volatile) or non-transitory (non-transitory) memory, and may also include optical disks, mechanical hard disks, solid state hard disks, and so on.
The embodiment of the present invention further provides a user terminal, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps related to the subframe receiving method shown in fig. 5 to 8 when executing the computer instructions. The user terminal includes, but is not limited to, a mobile phone, a computer, a tablet computer and other terminal devices.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A subframe reception method, comprising the steps of:
receiving at least a portion of a control region of the subframe, the subframe including a control region and a data region, and decoding the received at least a portion of the control region to determine whether DCI is included;
in response to the subframe not containing the DCI, turning off reception of at least a portion of a data region of the subframe;
the subframe is used for PDSCH channel decoding, and the data region contains N CRS pilot frequency positions;
the method further comprises the following steps:
determining a plurality of CRS pilot positions of the subframe, a portion of the CRS pilot positions being located within the control region and another portion being located within the data region;
turning off the signal detection function of the subframe at the position of at least one part of CRS pilot frequency in the data area;
wherein, in at least a part of CRS pilot positions in the data region, turning off the signal detection function of the subframe comprises:
closing PDCCH signal detection functions corresponding to the n CRS pilot frequency positions according to the time sequence; wherein N is a positive integer, and N is more than or equal to 1 and less than or equal to N.
2. The subframe receiving method according to claim 1,
and closing the signal detection function of the subframe by adopting an RFIC controller or an RFFEM controller.
3. The subframe reception method of claim 1, wherein turning off reception of at least a portion of a data region of the subframe comprises:
starting to receive the data area of the subframe within a preset time length before the ending time of the data area of the subframe;
and the preset duration is less than the duration of the data area.
4. A subframe receiving apparatus, comprising:
a reception determination module adapted to receive at least a portion of a control region of the subframe and decode the received at least a portion of the control region to determine whether DCI is included, the subframe including a control region and a data region;
a receiving closing module, adapted to close receiving the data region of the subframe in response to the subframe not containing the DCI;
the subframe is used for PDSCH channel decoding, and the data region contains N CRS pilot frequency positions;
wherein the apparatus further comprises:
a position determination module adapted to determine a plurality of CRS pilot positions of the subframe, a portion of the CRS pilot positions being located within the control region and another portion being located within the data region;
a shutdown detection module, adapted to shutdown a signal detection function of the subframe at least a part of CRS pilot positions in the data region;
wherein the shutdown detection module comprises: the closing detection submodule is suitable for closing PDCCH signal detection functions corresponding to the n CRS pilot frequency positions according to a time sequence;
wherein N is a positive integer, and N is more than or equal to 1 and less than or equal to N.
5. A storage medium having stored thereon computer instructions operable to perform the steps of the sub-frame reception method of any of claims 1 to 3.
6. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor when executing the computer instructions performs the steps of the subframe reception method according to any one of claims 1 to 3.
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