WO2016070552A1 - Function indication method, device and system - Google Patents

Abstract

Disclosed are a function indication method, device and system, the indication method comprising: transmitting an instruction carried in a channel or signal to a UE, the channel or signal need being received before the UE receives PDSCH or PDCCH data when initially accessing a network, the instruction being used to indicate whether the network supports a preset function, the PDSCH data comprising: PDSCH data carrying a broadcast system parameter of the UE, and PDSCH data carrying a unicast operation service. The present invention solves the problem of unnecessary power consumption in covering an enhanced machine type communication (MTC) UE, thus preventing excessive power consumption of the MTC UE.

Description

Method, device and system for function indication Technical field

The present invention relates to the field of communications, and in particular, to a method, apparatus, and system for function indication.

Background technique

Machine Type Communication (MTC) or Machine to Machine (M2M) User Equipment (UE) is the main application form of the Internet of Things at this stage. Low power consumption / low cost is an important guarantee for its large-scale application. The M2M devices currently deployed on the market are mainly based on the Global System of Mobile communication (GSM) system. In recent years, due to the higher spectral efficiency of the Long Term Evolution (LTE) system, and more and more mobile operators have determined the evolution direction of LTE as a future broadband wireless communication system, M2M based on LTE Data services will also be more attractive.

The cost of user equipment (including MTC UEs) comes mainly from two parts: the baseband processing part and the radio frequency part. In order to reduce the cost of the MTC UE, reducing the uplink and/or downlink transmission bandwidth of the UE (including baseband and radio frequency bandwidth) is a very effective way to reduce the cost of the MTC UE, for example, setting all uplink and/or downlink transmissions of the MTC UE. The bandwidth can only be narrowband bandwidth such as 1.4MHz (even if the system bandwidth is much longer than 1.4MHz). In addition to the above method of bandwidth reduction, the following manners can also be used to further reduce the cost of the MTC UE: a single receive antenna, reduced transmit power, and reduced maximum transport block size (Transport Block Size, TBS for short).

Since some MTC UEs are installed in the basement of a home or are obscured by aluminum alloy windows or traditional thick-walled building structures, these UEs experience considerable penetration loss on the RF interface compared to normal MTC UEs. Therefore, in order to ensure normal data transmission of the foregoing UE, it is necessary to enhance coverage of the foregoing MTC UE. The enhanced channel type includes a physical uplink/downlink shared channel (Physical Uplink/Downlink Shared Channel, PUSCH/PDSCH) and a Physical Uplink/Downlink Control Channel (PUCCH/PDCCH). The coverage enhancement of the physical downlink shared channel (PDSCH) includes: coverage enhancement of system information block (SIB) data of broadcast nature and coverage enhancement of unicast service data. In order to accumulate more energy to improve coverage, repeated methods are often used to achieve transmission enhancements for various channel types.

Therefore, low-cost MTC UEs can be divided into two categories, one is a low-cost MTC device with coverage enhancement requirements (ie, coverage enhanced MTC UE), such as smart metering (Smart Metering) devices, and the other is not. An MTC device (ie, a conventional MTC UE) with coverage enhancement requirements, such as a consumer electronics device. Currently, It is not mandatory for all cells to support coverage enhanced MTC devices. In this case, in order to identify whether the cell supports the coverage enhanced MTC device, the existing method is to enable a coverage enhanced MTC device to first acquire the synchronization signal and the main information block of the cell through Keep Trying (Master Information). Block, referred to as MIB), and then try to obtain the public SIB data related to the coverage enhancement according to the MIB information. If the SIB data cannot be obtained within the determined time limit, the coverage enhanced MTC device considers that the cell is not Support for coverage enhanced MTC devices; the above method results in excessive unnecessary power loss covering the enhanced MTC device since the UE must attempt to receive public coverage-related SIB data that may not exist for a long time.

For the related art, covering the problem of unnecessary power loss of the enhanced MTC device, an effective solution has not been proposed.

Summary of the invention

The present invention provides a method, apparatus and system for function indication to solve at least one of the above problems.

According to an embodiment of the present invention, a method for function indication is provided for a machine type communication MTC, comprising: transmitting an instruction carried in a channel or a signal to a UE, wherein the channel or signal is an initial of the UE a channel or a signal that needs to be received before receiving the PDSCH or PDCCH data when the network is accessed, the instruction is used to indicate whether the network supports a preset function, and the PDSCH data includes: PDSCH data that carries a broadcast system parameter of the UE. And PDSCH data carrying unicast services.

Further, the preset function includes: an MTC coverage enhancement function, and the UE is an coverage enhanced MTC UE.

Further, the transmitting the command carried in the channel or the signal to the UE includes at least one of: transmitting an instruction carried by the primary synchronization signal PSS to the terminal; and transmitting an instruction carried on the physical broadcast channel PBCH to the terminal; Sending an instruction carried on a preset defined physical channel to the terminal.

Further, if the command is carried in the primary synchronization signal PSS, the method includes: the sequence of the PSS is six, wherein the six PSS sequences and three different cell group identifiers and the signaling 6 Different combinations of one to one.

Further, if the instruction is carried on the physical broadcast channel PBCH, the method includes: the PBCH is transmitted on a fixed orthogonal frequency division multiplexing OFDM symbol of a predefined subframe; and the PBCH is not already in the LTE PBCH The fixed OFDM symbol of the predefined subframe does not overlap with the resources of the existing LTE PBCH transmission.

Further, if the command is carried in a preset defined physical channel, the method includes: the preset defined physical channel is transmitted on a fixed OFDM symbol of a predefined subframe; wherein the fixed OFDM symbol of the predefined subframe The resources of the existing LTE PBCH transmission are the same as those of the existing LTE PBCH transmission, or the fixed OFDM symbols of the predefined subframe do not overlap with the resources of the existing LTE PBCH transmission.

Further, the subframe that is set to be transmitted by the PBCH or the preset defined physical channel includes: at least one of subframe 0, subframe 4, subframe 5, and subframe 9; and is configured to be the PBCH transmission. Fixed OFDM symbol, wherein, for subframes 0 and 5, when the PBCH is an existing LTE PBCH, the fixed OFDM symbol is all but OFDM symbols occupied by the downlink control region and the synchronization signal Or partially; otherwise, the fixed OFDM symbol is all or part of other OFDM symbols except for the OFDM symbols occupied by the existing LTE PBCH, the downlink control region, and the synchronization signal; for subframes 4 and 9, the fixed OFDM symbol All or part of other OFDM symbols except the OFDM symbol occupied by the downlink control region; fixed OFDM symbols transmitted for the preset defined physical channel, when the fixed OFDM symbol and the existing LTE PBCH transmission resources are not When overlapping, where for subframes 0 and 5, the fixed OFDM symbol is all of the OFDM symbols except the OFDM symbols occupied by the existing LTE PBCH, the downlink control region, and the synchronization signal. Or partial; for subframes 4 and 9, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbol occupied by the downlink control region.

Further, if the network supports the MTC coverage enhancement function, the system parameters of the coverage enhanced MTC UE are transmitted on the same narrowband as the system parameters of the regular MTC UE, where the narrowband is a predefined narrowband Or a narrowband indicated by the primary information block MIB signaling carried in the PBCH; the total number of system information blocks SIB transmitted by the network on the narrowband is N, wherein any one of the N SIBs A system parameter that covers an enhanced MTC UE and/or a system parameter of a regular MTC UE; the N is a positive integer greater than or equal to one.

Further, the first SIB of the N SIBs are transmitted on a predefined subframe, and the other SIBs except the first SIB are transmitted according to respective fixed scheduling periods and scheduling time window sizes, or a respective scheduling period and a scheduling time window size transmission indicated by a field in the first SIB; wherein the predefined subframe includes, but is not limited to, subframe 0, subframe 4, subframe 5, and sub At least one of the frames 9, at least one of the subframe 0, the subframe 4, the subframe 5, and the subframe 9 in the odd radio frame, and the subframe 0, the subframe 4, the subframe 5, and the subframe 9 in all the radio frames At least one of them.

Further, the method includes: when the N is equal to 1, the unique SIB includes all system parameters of the coverage enhanced MTC UE and all system parameters of the regular MTC UE; when the N is greater than 1, the N SIBs The first SIB in the system includes the system parameters shared by the coverage enhanced MTC UE and the regular MTC UE, or the system parameters shared by the coverage enhanced MTC UE and the regular MTC UE and set to control other SIBs a necessary parameter of the transmission; any one of the N SIBs other than the first SIB includes a system parameter dedicated to the coverage enhanced MTC UE, or a system parameter dedicated to a regular MTC UE; The necessary parameters for controlling other SIB transmissions include, but are not limited to, scheduling period and scheduling time window size and transmission format.

Further, if the N is 2, the first SIB includes system parameters shared by the coverage enhanced MTC UE and the regular MTC UE, or shared by the coverage enhanced MTC UE and the regular MTC UE. System parameters and settings necessary to control the second SIB transmission; and the second SIB includes system parameters specific to the coverage enhanced MTC UE.

Further, if the N is 3, the first SIB includes system parameters shared by the coverage enhanced MTC UE and the regular MTC UE, or shared by the coverage enhanced MTC UE and the regular MTC UE. System parameters and parameters necessary to control the second and third SIB transmissions; and the second and third SIBs or the third and second SIBs respectively include systems dedicated to the coverage enhanced MTC UE and the regular MTC UE parameter.

Further, if the network supports the MTC coverage enhancement function, the paging Paging message of the coverage enhanced MTC UE and the Paging message of the regular MTC UE are transmitted on different narrowbands, and the coverage enhanced MTC UE and A conventional MTC UE has different paging control channel PCCH system configuration parameters; wherein the different narrowbands are predefined or indicated by the SIB signaling.

Further, the method includes: when the network supports the MTC coverage enhancement function, the Paging message uses group coding or independent coding, and the Paging message is transmitted by using an enhanced downlink control channel EPDCCH scheduling or no control operation. In the case of group coding, in any of the Paging messages, all of the coverage enhanced MTC UEs that are simultaneously paged use or have the same repetition level.

Further, the method includes: obtaining an indication that the UE is in an idle Idle state and a historical paging message repetition level; and when determining that the UE is in an idle Idle state, the Paging message is in a non-control operation transmission manner, and is logged from the history Starting with a message repetition level, in turn using all Paging message repetition levels above the historical Paging message repetition level to attempt to transmit a Paging message until receiving uplink data from the UE; when determining that the UE is in an idle Idle state, The Paging message is in accordance with the transmission mode of the EPDCCH scheduling, and starts from the historical Paging message repetition level, and sequentially uses all Paging message repetition levels above the historical Paging message repetition level to attempt to transmit the EPDCCH and the corresponding P scheduling message. Paging the message until receiving uplink data from the UE.

Further, if the network supports the MTC coverage enhancement function, the system parameters of the coverage enhanced MTC UE and the system parameters of the regular MTC UE are transmitted in different narrowbands; The MIB signaling in the PBCH indicates, or the coverage enhanced MTC UE narrowband is predefined; or the coverage enhanced MTC UE narrowband is implicitly determined by a conventional MTC UE narrowband.

Further, the system parameter of the coverage enhanced MTC UE includes at least one of the following: a parameter indicating a time-frequency location of the repeatedly transmitted physical random access channel PRACH, indicating a parameter of a preset defined PRACH format, indicating that a Paging message is available. The parameters of the subframe, and parameters indicating the repeated transmission resources of the physical channel or the repetition transmission level/number of times.

According to another embodiment of the present invention, there is also provided a method for function indication, for a machine type communication MTC, comprising: a UE receiving an instruction carried in a channel or a signal, wherein the channel or signal is the UE a channel or a signal that needs to be received before receiving the PDSCH or PDCCH data when the network is initially accessed, the instruction is set to indicate whether the network supports a preset function, and the PDSCH data includes: a PDSCH that carries a system parameter of a broadcast of the UE. Data and PDSCH data carrying unicast services.

Further, the preset function includes: an MTC coverage enhancement function, and the UE is an coverage enhanced MTC UE.

Further, the receiving the command carried in the channel or the signal comprises at least one of: receiving an instruction carried on the primary synchronization signal PSS; receiving an instruction carried on the physical broadcast channel PBCH; and receiving an instruction carried on the preset defined physical channel.

Further, if the command is carried in the primary synchronization signal PSS, the method includes: the sequence of the PSS is six, wherein the six PSS sequences and three different cell group identifiers and the signaling 6 Different combinations of one to one.

Further, if the instruction is carried in the physical broadcast channel PBCH, the method includes: the PBCH is received on a fixed orthogonal frequency division multiplexing OFDM symbol of a predefined subframe; and the PBCH is not already in the LTE PBCH The fixed OFDM symbol of the predefined subframe does not overlap with the resource that receives the existing LTE PBCH.

Further, if the command is carried in a preset defined physical channel, the method includes: the preset defined physical channel is received on a fixed OFDM symbol of a predefined subframe; wherein the fixed OFDM symbol of the predefined subframe The same as the resource that receives the existing LTE PBCH, or the fixed OFDM symbol of the predefined subframe does not overlap with the resource that receives the existing LTE PBCH.

Further, the subframe that is set to be received by the PBCH or the preset defined physical channel includes: at least one of subframe 0, subframe 4, subframe 5, and subframe 9; and is configured to receive the PBCH Fixed OFDM symbol, wherein for subframes 0 and 5, when the PBCH is an existing LTE PBCH, the fixed OFDM The symbol is all or part of other OFDM symbols except the OFDM symbol occupied by the downlink control region and the synchronization signal; otherwise, the fixed OFDM symbol is other than the OFDM symbol occupied by the existing LTE PBCH, the downlink control region, and the synchronization signal. All or part of other OFDM symbols; for subframes 4 and 9, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbol occupied by the downlink control region; set as the preset defined physical channel The fixed OFDM symbol received, when the fixed OFDM symbol does not overlap with the resources of the existing LTE PBCH transmission, wherein for subframes 0 and 5, the fixed OFDM symbol is in addition to the existing LTE PBCH, the downlink control region, and All or part of other OFDM symbols other than the OFDM symbol occupied by the synchronization signal; for subframes 4 and 9, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbol occupied by the downlink control region.

Further, when the preset defined physical channel is used, the sequence in which the coverage enhanced MTC UE initially accesses the network to receive a signal or a channel includes: first receiving a synchronization signal, and then receiving a preset defined physical channel, and other physical a channel; wherein the synchronization signal includes a PSS and a secondary synchronization signal SSS; wherein the other physical channels include: an enhanced downlink control channel EPDCCH, a PBCH, and a PDSCH.

Further, the method includes: when the coverage enhanced MTC UE determines, according to the instruction, that the MTC coverage enhancement function is not supported by the network, the coverage enhanced MTC UE abandons access to the network.

Further, if the network supports the MTC coverage enhancement function, the narrowband that is shared with the regular MTC UE receives the system parameter of the coverage enhanced MTC UE; wherein the narrowband is a predefined narrowband, or according to a narrowband acquired by the primary information block MIB signaling carried in the PBCH; the total number of system information blocks SIB transmitted by the network on the narrowband is N, wherein any one of the N SIBs includes coverage enhanced MTC System parameters of the UE and/or system parameters of the regular MTC UE; the N is a positive integer greater than or equal to 1.

Further, the method includes: the number of SIBs that include the coverage enhanced MTC UE system parameter in the N SIBs is M, where the M is a positive integer greater than or equal to 1 and less than or equal to N; the first of the M SIBs An SIB is received on a predefined subframe, and other SIBs except the first SIB are received according to respective fixed scheduling periods and scheduling time window sizes, or the respective schedulings are obtained according to fields from the first SIB. The period and the scheduling time window size are received; wherein the predefined subframe includes, but is not limited to, at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in an even radio frame, in an odd radio frame At least one of subframe 0, subframe 4, subframe 5, and subframe 9, and at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in all radio frames.

Further, if the network supports the MTC coverage enhancement function, receiving a Paging message according to the PCCH system configuration parameter on the determined narrowband; wherein the determined narrowband is predefined, or Is a narrowband obtained according to SIB signaling; the determined narrowband and the PCCH system configuration parameters are different from the narrowband and PCCH system configuration parameters used by the regular MTC UE Paging message.

Further, if the network supports the MTC coverage enhancement function, the paging message is transmitted by using group coding or independent coding, and enhanced downlink control channel EPDCCH scheduling or no control operation; In the case of any of the Paging messages, all of the coverage enhanced MTC UEs that are simultaneously paging use or have the same repetition level.

Further, when the coverage enhanced MTC UE is in the idle Idle state, if the EPDCCH scheduling transmission mode is used, the EPDCCH of the scheduling Paging message is received in a blind detection manner according to the historical Paging message repetition level, and then, according to the setting Receiving a Paging message for the EPDCCH scheduling the paging message; if it is used based on the uncontrolled operation and the independent coding transmission mode, receiving the Paging message in a blind detection manner according to the historical Paging message repetition level; if it is used based on the uncontrolled operation and the group coding transmission mode The Paging message is received in a blind detection manner according to the historical paging message repetition level and the TBS set of the potential Paging message.

Further, if the network supports the MTC coverage enhancement function, the system parameters of the coverage enhanced MTC UE are received in a narrowband different from the regular MTC UE; wherein the narrowband is a predefined narrowband, or according to The narrowband acquired by the MIB signaling carried in the PBCH, or the narrowband implicitly determined according to the narrowband of the conventional MTC UE.

According to another embodiment of the present invention, a device for providing a function indication, configured as a machine type communication MTC, includes: a sending module, configured to send an instruction carried in a channel or a signal to the UE, where The channel or the signal is a channel or a signal that needs to be received before the UE receives the PDSCH or the PDCCH data when the UE initially accesses the network, and the instruction is used to indicate whether the network supports a preset function, where the PDSCH data includes: carrying the PDSCH data of system parameters of the broadcast of the UE, and PDSCH data carrying the unicast service.

Further, the preset function includes: an MTC coverage enhancement function, and the UE is an coverage enhanced MTC UE.

According to another embodiment of the present invention, there is further provided a device for function indication, for a machine type communication MTC, comprising: a receiving module, configured to receive, by the UE, an instruction carried in a channel or a signal, wherein the channel or The signal is a channel or a signal that needs to be received before receiving the PDSCH or the PDCCH data when the UE initially accesses the network, and the instruction is used to indicate whether the network supports a preset function, where the PDSCH data includes: carrying the UE PDSCH data of broadcast system parameters and PDSCH data carrying unicast services.

Further, the preset function includes: an MTC coverage enhancement function, and the UE is an coverage enhanced MTC UE.

According to another embodiment of the present invention, there is further provided a system for function indication, for machine type communication MTC, comprising: a base station side, comprising the apparatus according to any one of the preceding claims; a terminal side comprising the above-mentioned claims The device of any of the preceding claims.

According to the present invention, the UE is sent to the UE by using an instruction to be transmitted in a channel or a signal, where the channel or signal is a channel or a signal that needs to be received before receiving the PDSCH or PDCCH data when the UE initially accesses the network, and the command is used by the UE. Instructing whether the network supports a preset function, the PDSCH data includes: PDSCH data carrying a system parameter of a broadcast of the UE, and PDSCH data carrying a unicast service, which solves unnecessary power loss of the coverage enhanced MTC UE. The problem, thus avoiding excessive power loss of the MTC UE.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flowchart 1 of a method for indicating a function according to an embodiment of the present invention;

2 is a schematic diagram of available fixed OFDM symbols of a predefined subframe according to an embodiment of the present invention;

3 is a second flowchart of a method for indicating a function according to an embodiment of the present invention;

4 is a structural block diagram 1 of an apparatus for indicating a function according to an embodiment of the present invention;

FIG. 5 is a structural block diagram 2 of an apparatus for function indication according to an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

A method for indicating a function is provided in this embodiment. FIG. 1 is a flowchart 1 of a method for indicating a function according to an embodiment of the present invention. As shown in FIG. 1 , the process includes the following steps:

Step S102: Send an instruction carried in a channel or a signal, where the channel or signal is a channel or a signal that needs to be received before receiving the PDSCH or PDCCH data when the UE initially accesses the network, and the instruction is used for Indicates whether the network supports a preset function, and the PDSCH data includes: PDSCH data carrying a system parameter of a broadcast of the UE, and PDSCH data carrying a unicast service.

The instructions are equivalent to signaling, unless otherwise indicated.

Through the foregoing steps, the signaling indicates whether the network supports the preset function, where the foregoing signaling is carried in a channel or a signal that needs to be received before receiving the PDSCH or PDCCH data when the UE initially accesses the network; wherein the PDSCH data includes The PDSCH data carrying at least the broadcast and the PDSCH data carrying the unicast service solve the problem of covering unnecessary power loss of the enhanced MTC UE, thereby avoiding excessive power loss of the MTC UE.

In this embodiment, the preset function may be multiple, including: an MTC coverage enhancement function; in this case, the foregoing UE is an coverage enhanced MTC UE.

In this embodiment, the PDCCH includes, but is not limited to, an Enhanced Physical Downlink Control Channel (EPDCCH) data. The resource mapping of the PDCCH of the existing LTE system is performed in the full bandwidth range, so the above existing PDCCH will no longer be applicable to the coverage enhanced MTC UE having only the narrowband transmission capability; however, the EPDCCH of the existing LTE system is supported. In the form of narrowband transmission, that is, a physical resource block (PRB) can be occupied in the frequency domain.

In this embodiment, the command to be sent in the channel or the signal to the UE may be in multiple manners, and may include at least one of the following: the channel or the signal includes: a primary synchronization signal (PSS) and a physical A Physical Broadcast Channel (PBCH) and a new physical channel (which may also be referred to as a preset defined physical channel) dedicated to transmitting the above signaling. The PSS and the preset defined physical channel are dedicated to covering signals and channels of the enhanced MTC UE; the PBCH is dedicated to the coverage enhanced MTC UE or the PBCH channel dedicated to the coverage enhanced MTC UE and the regular MTC UE, or Is the PBCH already in the current LTE system. The advantage of using the new physical channel dedicated to transmitting the above signaling is that it has a higher coverage capability due to the least content carried (only 1 bit payload), and it requires less decoding delay and power than PBCH. Lower consumption.

In this embodiment, when the command is carried in the primary synchronization signal PSS, the PSS sequence is six different from the existing LTE system, and the PSS time-frequency location of the PSS and the existing LTE system. The same time-frequency resource is: the last Orthogonal Frequency Division Multiplexing (OFDM) symbol in the first time slot of subframes 0 and 5 in the time domain, which is located in the frequency domain. The 1.4MHz bandwidth of the system bandwidth center or the physical resources of 6 PRBs. In addition, the above six PSS sequences are in one-to-one correspondence with three different cell group identifiers and six different combinations of the above instructions. For example, the specific correspondence can be as shown in the following table:

Table 1

sequence	combination
		1st PSS sequence	ID in the first cell group, support for MTC coverage enhancement
2nd PSS sequence	ID in the first cell group, does not support MTC coverage enhancement
		3rd PSS sequence	ID in the second cell group, support for MTC coverage enhancement
4th PSS sequence	ID in the second cell group does not support MTC coverage enhancement
		5th PSS sequence	Identification within the third cell group, support for MTC coverage enhancement
6PSS sequence	ID in the third cell group, does not support MTC coverage enhancement

Since the PSS dedicated to the coverage enhanced MTC UE is the same as the existing LTE system (also referred to as the existing LTE) PSS time-frequency location, the method can not change the existing downlink synchronization behavior of the UE, including OFDM symbols and time slots. , subframe, and half-frame timing. In order to ensure backward compatibility, the base station or the network (eNB) can simultaneously transmit two sets of PSSs at the same time-frequency resource location as described above, for example, by different radio frequency modules, or after baseband superposition, and then used for existing LTE. Synchronization with coverage enhanced MTC UEs.

In this embodiment, when the command is carried on the physical broadcast channel PBCH, the method includes:

The above PBCH is transmitted on a fixed OFDM symbol of a predefined subframe. The predefined subframe configured for the PBCH transmission includes: at least one of subframe 0, subframe 4, subframe 5, and subframe 9; and a fixed OFDM symbol set for the PBCH transmission, where, for the subframe 0 and subframe 5, when the PBCH is a PBCH that inherits an existing LTE system (which may also be referred to as existing LTE), the fixed OFDM symbol is an OFDM symbol other than the OFDM symbol occupied by the downlink control region and the synchronization signal. All or part; otherwise, the fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbols occupied by the existing LTE PBCH, the downlink control region, and the synchronization signal; for subframe 4 and subframe 9, the fixed OFDM symbol It is all or part of other OFDM symbols except the OFDM symbols occupied by the downlink control region. In addition, when the PBCH is an existing LTE PBCH, the existing LTE PBCH resources allocated to the existing LTE system, that is, the first 4 OFDM symbols of the second slot of the subframe 0, are used to save overhead. The predefined subframe includes at least subframe 0 and the fixed OFDM symbol of the subframe 0 includes at least the above 4 OFDM symbols; when the PBCH is dedicated to coverage enhanced MTC UE or dedicated to coverage enhanced MTC UE and regular MTC UE (also When the PBCH may be referred to as non-existing LTE), the above method can ensure that the fixed OFDM symbol of the above-mentioned predefined subframe used for the PBCH transmission does not overlap with the resource or fixed OFDM symbol used for the existing LTE PBCH transmission.

For example, as shown in FIG. 2, it is assumed that the PBCH is a non-existing LTE PBCH and a predefined subframe for transmitting the PBCH includes a subframe 0, a subframe 4, a subframe 5, and a subframe 9; specifically, Subframe 0 is an example. The first three OFDM symbols in subframe 0 are the downlink control region of the existing LTE system for resource mapping in the entire system bandwidth, and the first slot in subframe 0 (slot 0) The last 2 OFDM symbols are existing LTE The primary and secondary synchronization signals PSS/SSS, the first 4 OFDM symbols of the second time slot (slot 1) in subframe 0 are existing LTE PBCHs, so to avoid serious interference between different physical channels or signals, subframe 0 The above 9 OFDM symbols are not available for transmission of the PBCH; similarly, they are fixedly occupied by existing LTE physical channels or signals in other predefined subframes (including subframe 4, subframe 5, and subframe 9) The OFDM symbol is also not available for transmission of the PBCH.

Furthermore, the fixed OFDM symbols in different predefined subframes transmitting the PBCH may be the same or different.

If the above PBCH is an existing LTE PBCH, the reserved bits carried in the existing MIB field in the existing LTE PBCH may be used. The content of the foregoing existing MIB field includes a system frame number (8 bits), a downlink bandwidth indication (3 bits), a physical HARQ indication channel (PHICH) configuration (3 bits), and a reserved field (10 bits); The HARQ is an abbreviation of Hybrid Automatic Repeated Request. One bit of the above reserved 10-bit reserved field may be used as the instruction to indicate to all coverage enhanced MTC UEs whether the current network supports MTC coverage enhancement.

In this embodiment, when the command is carried in a preset defined physical channel,

The preset defined physical channel is transmitted on a fixed OFDM symbol of a predefined subframe; wherein the predefined subframes set to be preset defined physical channel transmissions include: subframe 0, subframe 4, subframe 5, and subframe At least one of 9.

The fixed OFDM symbol of the foregoing predefined subframe is the same (overlap) as the resource (OFDM symbol) set to the existing LTE PBCH transmission, that is, the first 4 OFDM of the second slot (slot 1) in the subframe 0 a symbol; at this time, the predefined subframe is subframe 0 and the fixed OFDM symbol is the first 4 OFDM symbols of the second slot; the method can save physical channel overhead as much as possible, but due to different channels Interference, larger acquisition or decoding delays may be caused, which is not conducive to energy saving;

Or, the fixed OFDM symbol of the foregoing predefined subframe does not overlap with the resources of the existing LTE PBCH transmission; the fixed OFDM symbol transmitted by the preset defined physical channel is set at this time, where the fixed is fixed for subframes 0 and 5. The OFDM symbol is all or part of other OFDM symbols except the OFDM symbols occupied by the existing LTE PBCH, the downlink control region, and the synchronization signal; for subframes 4 and 9, the fixed OFDM symbol is the OFDM occupied by the downlink control region. All or part of other OFDM symbols than symbols; although this method can ensure the transmission performance of the defined physical channel by default, it leads to more physical channel overhead, especially at the center of the system bandwidth.

Wherein, the foregoing preset definition physical channel structure may be based on an extension of a sequence/orthogonal code in a time-frequency domain, or based on a conventional channel coding and modulation manner; when the above-described sequence/orthogonal code extension mode is applied, The above-mentioned preset definition physical channel can also be used for downlink synchronization in consideration of its structure similar to the synchronization signal.

Considering that the coverage enhanced MTC UE does not know the system bandwidth in the case of receiving the PBCH or the preset defined physical channel, the PBCH or the frequency location of the preset defined physical channel must always be located at six physical resources in the center of the system bandwidth. Within the block PRB range. To increase coverage, the number of fixed OFDM symbols for the PBCH or the predefined defined subframe and/or predefined subframe for the defined physical channel transmission may be relatively large.

In the above embodiment, if the MTC coverage enhancement function is not supported by the network, the system parameters dedicated to the coverage enhanced MTC UE are no longer included in all system parameters broadcast by the eNB. At this point, the network will only consider the regular MTC UE type and will no longer consider the coverage enhanced MTC UE type. To save control overhead, the predefined subframes used to broadcast any of the system parameters need not be excessive, or the corresponding scheduling time window size does not need to be set too large. The scheduling time window periodically appears based on a scheduling period of the system parameter and includes at least 1 subframe.

In the above embodiment, considering the Layer 2/Layer 3 (L2/L3) functions required by the conventional MTC UE and the coverage enhanced MTC UE, for example, the degree of mobility support, and the transmission manner of the specific physical channel are not completely the same, For example, for the coverage enhanced MTC UE, the repeated transmission mechanism of the specific physical channel and the corresponding repetition level will be introduced, so the system configuration parameters of the above two types of MTC UEs may not be completely the same.

In the case that the network supports the MTC coverage enhancement function, the coverage enhanced MTC UE system parameters and the regular MTC UE system parameters may be transmitted on the same narrowband, where the narrowband is a predefined narrowband or is carried by the primary carried in the PBCH. Narrowband indicated by information block MIB signaling; the PBCH is dedicated to coverage enhanced MTC UEs or PBCH channels dedicated to coverage enhanced MTC UEs and regular MTC UEs; for example, within a determined system bandwidth range, different narrowbands are envisaged If there is no overlap, there may be multiple narrowbands available. In this case, one of the plurality of narrowbands may be predefined, or one of the plurality of narrowbands may be indicated by the MIB signaling for transmitting the two types of MTC UEs. The type of system parameter. In addition, the total number of system information blocks SIBs transmitted by the network or the eNB on the narrowband is N, wherein any one of the N SIBs includes a system parameter that covers the enhanced MTC UE and/or a system parameter of the regular MTC UE; N is a positive integer greater than or equal to 1.

The first SIB of the N SIBs are transmitted on a predefined subframe, and other SIBs except the first SIB are transmitted according to respective fixed scheduling periods and scheduling time window sizes, or according to fields in the first SIB. Instructed respective scheduling period and scheduling time window size transmission; wherein the predefined subframe includes, but is not limited to, at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in an even radio frame, odd number Subframe 0 in the radio frame, At least one of subframe 4, subframe 5, and subframe 9, and at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in all radio frames.

When the N is equal to 1, the unique SIB includes all system parameters that cover all system parameters of the enhanced MTC UE and the regular MTC UE; at this time, the system parameters of the regular MTC UE and the coverage enhanced MTC UE are uniformly designed, that is, Which UE type, the system parameter set they receive is always the same, except that the system parameters dedicated to the coverage enhanced MTC UE are invalid for the regular MTC UE, and the system parameters similarly dedicated to the regular MTC UE are Covering enhanced MTC UEs is also ineffective.

When the N is greater than 1, the first SIB of the N SIBs includes system parameters shared by the enhanced enhanced MTC UE and the regular MTC UE, or the system parameters shared by the coverage enhanced MTC UE and the regular MTC UE, and The necessary parameters for controlling other SIB transmissions; any one of the N SIBs except the first SIB includes system parameters dedicated to the coverage enhanced MTC UE, or system parameters specific to the regular MTC UE The necessary parameters for controlling other SIB transmissions include, but are not limited to, a scheduling period, a scheduling time window size, a transmission format, and specific content included in the SIB; the transmission formats include, but are not limited to, a TBS and an allocated number of PRBs.

In this case, the network will need to consider both regular and coverage enhanced MTC UE types. To ensure coverage, a pre-defined subframe for transmitting the first SIB of the foregoing N SIBs is required, and a scheduling time window size of other SIBs including system parameters dedicated to covering the enhanced MTC UE needs to be set larger; To avoid unnecessary system control overhead, the scheduling time window size of other SIBs containing system parameters specific to regular MTC UEs need not be set too large.

In the present embodiment, the above N is equal to two. The first SIB includes a conventional MTC UE and a coverage enhanced MTC UE sharing system parameter, or a system parameter shared by the regular MTC UE and the coverage enhanced MTC UE, and a necessary parameter for controlling the second SIB transmission; and, the second SIB Contains system parameters specific to the coverage enhanced MTC UE. At this time, the system parameters of the conventional MTC UE and the coverage enhanced MTC UE are independently designed, and it is assumed that the system parameters required by the conventional MTC UE must be the system parameters required for the enhanced MTC UE, but the system parameters required for the coverage enhanced MTC UE may not be applicable. For regular MTC UEs. Specifically, all system parameters are classified into two types, one is a system parameter shared by a regular MTC UE and a coverage enhanced MTC UE, and a necessary parameter for controlling a second SIB transmission, and the other is a system dedicated to covering an enhanced MTC UE. parameter. Both the regular and coverage enhanced MTC UEs need to receive the first SIB, but the conventional MTC UE does not need to receive the second SIB, and the necessary parameters for controlling the second SIB transmission are invalid for the regular MTC UE, and the coverage enhanced MTC UE receives the first The second SIB message will continue to be received in addition to the SIB.

In the present embodiment, the above N is equal to 3. The first SIB includes a conventional MTC UE and a coverage enhanced MTC UE sharing system parameter, or a system parameter shared by the regular MTC UE and the coverage enhanced MTC UE, and necessary parameters for controlling the second and third SIB transmissions; The second and third SIBs or the third and second SIBs respectively include system parameters dedicated to the coverage enhanced MTC UE and the regular MTC UE. At this time, the system parameters of the regular and coverage enhanced MTC UE are independently designed, and it is assumed that the system parameters required by the conventional MTC UE are partially coincident with the system parameters required by the coverage enhanced MTC UE; specifically, all system parameters are classified into three types. The first type is the system parameters shared by the regular MTC UE and the coverage enhanced MTC UE, and the necessary parameters for controlling the second and third SIB transmissions, and the second type is the system parameter dedicated to covering the enhanced MTC UE (assumed to be the first The second SIB), the third category is the system parameters dedicated to the regular MTC UE (assumed to be the third SIB). Both the normal MTC UE and the coverage enhanced MTC UE need to receive the first SIB; the conventional MTC UE does not need to receive the second SIB, and the necessary parameters for controlling the second SIB transmission are invalid for the regular MTC UE, but continue to receive the third. The SIB; the coverage enhanced MTC UE continues to receive the second SIB in addition to receiving the first SIB, but does not need to receive the third SIB, and the necessary parameters for controlling the third SIB transmission are invalid for the coverage enhanced MTC UE.

Whether it is a regular MTC UE or a coverage enhanced MTC UE, they may try to merge and receive the first SIB data in the adjacent predefined subframe, and other SIB data except the first SIB in different scheduling periods.

In this embodiment, when the command is carried in a non-existing LTE PBCH, the first SIB may include system bandwidth information included in an MIB carried in an existing LTE PBCH in an existing LTE system, but considering the MTC UE. The system bandwidth cannot be determined when the first SIB is received, so in this case, at least the transmission narrowband of the first SIB can only be predefined as a narrowband of the system bandwidth center, or by being carried by the non-existing LTE PBCH. The new MIB field above at least indicates the determined frequency offset of the transmission narrowband of the first SIB described above.

In this embodiment, in the case that the network supports the MTC coverage enhancement function, the coverage enhancement and the paging Paging message of the regular MTC UE are transmitted on different narrowbands, and the coverage enhanced MTC UE and the regular MTC UE have different paging controls. Channel PCCH (Paging Control Channel, PCCH for short) system configuration parameters; wherein the different narrowbands are predefined or indicated by respective SIB signaling.

In this embodiment, the Paging message of the enhanced MTC UE is covered, using group coding or independent coding, and transmitting according to EPDCCH scheduling or no control operation; in the case of group coding, in any Paging message, searching simultaneously All coverage of the call enhances the use of the MTC UE or has the same repetition level. The foregoing group coding means that any one of the paging messages may include one or more paging records for paging one or more UEs; the foregoing independent coding means that any one of the paging messages always includes a paging for one UE. The only one is the paging record.

In this embodiment, after obtaining the indication that the coverage enhanced MTC UE is in the idle Idle state, the Paging message repetition level of the UE history is also acquired.

If the transmission mode is based on the uncontrolled operation, the historical Paging message repetition level is obtained from the Mobile Management Entity (MME), and the repetition level of the historical Paging message is used, and the repetition level of the historical Paging message is used in sequence. All Paging message repetition levels, attempting to transmit a Paging message until receiving uplink data from the coverage enhanced MTC UE;

If the transmission mode based on the EPDCCH scheduling is used, the historical Paging message repetition level is obtained from the MME, and starting from the historical Paging message repetition level, all the Paging message repetition levels above the historical Paging message repetition level are sequentially used, and the transmission scheduling is attempted. PPDCCH message EPDCCH and corresponding Paging message until receiving uplink data from the coverage enhanced MTC UE;

The specific repeated transmission times required by the paging message itself are related to the transport block size TBS of the paging message according to the determined paging level of the paging message; wherein the TBS depends on the coverage enhanced MTC UE using the same repetition level for simultaneous paging. Specifically, for independent coding, the number of UEs that are simultaneously paged is always one, so the above TBS is always a fixed value; for group coding, the number of UEs that are simultaneously paged may be different UE numbers greater than or equal to 1, Therefore, the above TBS is a non-fixed value.

In this embodiment, if the MTC coverage enhancement function is supported by the network, the system parameters of the coverage enhancement MTC UE and the system parameters of the regular MTC UE may also be transmitted in different narrowbands; at this time, it is equivalent to the regular MTC UE and the coverage enhancement. MTC UEs use different narrowband systems without any interference from each other.

In this embodiment, the coverage enhanced MTC UE narrowband is pre-defined by the MIB signaling carried in the PBCH, or the coverage enhanced MTC UE narrowband is implicitly determined by the conventional MTC UE narrowband; the PBCH is dedicated to The coverage enhanced MTC UE or the PBCH channel dedicated to covering the enhanced MTC UE and the regular MTC UE. For example, in the case where a conventional MTC UE narrowband is known, the coverage enhanced MTC UE narrowband can be determined according to the following equation:

q ₂ =(q ₁ +k)modQ,

Where q ₁ denotes a narrowband index identifying a narrowband position of a regular MTC UE, q ₂ denotes a narrowband index that identifies a narrowband position of the enhanced MTC UE, Q denotes a total available narrowband number, k denotes a fixed offset or depends on system bandwidth or total The offset of the available narrowband number Q.

In the above embodiment, the system parameter dedicated to the coverage enhanced MTC UE includes at least one of the following:

a parameter indicating a time-frequency location of a physical random access channel (PRACH) that is repeatedly transmitted, indicating a parameter of a preset defined PRACH format, indicating a parameter of a available subframe of the paging message, and indicating a physical channel Repeated transmission of resources or repeated transmission level/number of parameters.

In this embodiment, a method for function indication is also provided, which is applied to the terminal side. FIG. 3 is a flowchart 2 of a method for function indication according to an embodiment of the present invention. As shown in FIG. 3, the flow includes the following steps. step:

Step S202: The UE receives an instruction carried in a channel or a signal, where the channel or signal is a channel or a signal that needs to be received before receiving the PDSCH or PDCCH data when the UE initially accesses the network, and the instruction is used to indicate whether the network supports the network. The preset function, the PDSCH data includes: PDSCH data carrying a system parameter of a broadcast of the UE, and PDSCH data carrying a unicast service.

Through the foregoing steps, the signaling indicates whether the network supports the preset function, where the foregoing signaling is carried in a channel or a signal that needs to be received before receiving the PDSCH or PDCCH data when the UE initially accesses the network; wherein the PDSCH data includes The PDSCH data carrying at least the broadcast and the PDSCH data carrying the unicast service solve the problem of covering unnecessary power loss of the enhanced MTC UE, thereby avoiding excessive power loss of the MTC UE.

In this embodiment, the preset function includes an MTC coverage enhancement function; at this time, the UE is an coverage enhanced MTC UE.

In this embodiment, the foregoing PDCCH includes but is not limited to EPDCCH data.

In this embodiment, the receiving the command carried in the channel or the signal may be in multiple manners, and may include at least one of the following: the channel or the signal includes: a primary synchronization signal PSS and a physical broadcast channel PBCH, and is dedicated to transmitting the signaling. New physical channel (also known as a preset defined physical channel). The PSS and the preset defined physical channel are dedicated to covering signals and channels of the enhanced MTC UE; the PBCH is dedicated to the coverage enhanced MTC UE or the PBCH channel dedicated to the coverage enhanced MTC UE and the regular MTC UE, or Is the PBCH already in the current LTE system. The advantage of using the new physical channel dedicated to transmitting the above signaling is that it has a higher coverage capability due to the least content carried (only 1 bit payload), and it requires less decoding delay and power than PBCH. Lower consumption.

In this embodiment, when the command is carried in the PSS, the PSS sequence is six and different from the PSS sequence of the existing LTE system, and the PSS is the same as the PSS time-frequency position of the existing LTE system. Wherein, the above six PSS sequences are in one-to-one correspondence with three different cell group identifiers and six different combinations of the above instructions.

In this embodiment, in the case that the instruction is carried in the PBCH, the method includes:

The PBCH is received on a fixed OFDM symbol of a predefined subframe;

If the PBCH is an existing LTE PBCH, the reserved bits carried in the existing MIB field in the existing LTE PBCH may be used. If the PBCH is not already existing in the LTE PBCH, the fixed OFDM symbol of the foregoing predefined subframe used for the PBCH reception does not overlap with the resource used for the existing LTE PBCH reception.

In this embodiment, if the command is carried in a preset defined physical channel, the preset defined physical channel is received on a fixed OFDM symbol of a predefined subframe; wherein the fixed OFDM symbol of the predefined subframe It can be the same (overlap) as the resource (OFDM symbol) that receives the existing LTE PBCH. This method can save the physical channel overhead as much as possible, but due to the interference between different channels, more presets define the repetition of the physical channel and more. A large acquisition or decoding delay may be caused, which is not conducive to energy saving; or the fixed OFDM symbol of the predefined subframe does not overlap with the resource that receives the existing LTE PBCH, although the method can ensure the transmission of the preset defined physical channel. Performance, but results in more physical channel overhead, especially at the center of the system bandwidth. Wherein, the foregoing preset definition physical channel structure may be based on an extension of a sequence/orthogonal code in a time-frequency domain, or based on a conventional channel coding and modulation manner; when the above-described sequence/orthogonal code extension mode is applied, The above-mentioned preset definition physical channel can also be used for downlink synchronization in consideration of its structure similar to the synchronization signal.

In this embodiment, the subframe used for receiving the PBCH or the preset defined physical channel includes:

At least one of subframe 0, subframe 4, subframe 5, and subframe 9;

A fixed OFDM symbol for the PBCH reception, wherein, for subframe 0 and subframe 5, when the PBCH is an existing LTE PBCH, the fixed OFDM symbol is other than an OFDM symbol occupied by a downlink control region and a synchronization signal. All or part of an OFDM symbol; otherwise, the fixed OFDM symbol is all or part of an OFDM symbol other than an OFDM symbol occupied by an existing LTE PBCH, a downlink control region, and a synchronization signal; for subframe 4 and subframe 9, The fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbol occupied by the downlink control region;

The fixed OFDM symbol received by the physical channel for the preset definition, when the fixed OFDM symbol does not overlap with the resources of the existing LTE PBCH transmission, wherein for the subframe 0 and the subframe 5, the fixed OFDM symbol is except for the OFDM symbol All or part of other OFDM symbols except the OFDM symbol occupied by the LTE PBCH, the downlink control region, and the synchronization signal; for subframe 4 and subframe 9, the fixed OFDM symbol is other OFDM than the OFDM symbol occupied by the downlink control region All or part of the symbol.

In this embodiment, when the preset defined physical channel is used, the sequence of the coverage enhanced MTC UE initial access network receiving signal or channel includes:

First receiving a synchronization signal, and then receiving a preset defined physical channel, and other physical channels;

Wherein, the synchronization signal comprises:

Primary synchronization signal PSS and secondary synchronization signal (Secondary Synchronization Signal, SSS for short);

The other physical channels include: EPDCCH, PBCH, PDSCH, and the like.

In this embodiment, when the coverage enhanced MTC UE determines, according to the instruction, that the MTC coverage enhancement function is not supported by the network, the coverage enhanced MTC UE gives up access to the network.

In this embodiment, if the network supports the MTC coverage enhancement function, the system parameters of the coverage enhanced MTC UE are received in a narrowband shared with the regular MTC UE; wherein the narrowband is a predefined narrowband or is carried according to the PBCH. Narrowband acquired by MIB signaling in the middle, the PBCH is dedicated to coverage enhanced MTC UE or PBCH dedicated to coverage enhancement and regular MTC UE. The total number of SIBs transmitted by the network on the narrowband is N, wherein any one of the N SIBs includes a system parameter that covers enhanced MTC UE system parameters and/or a regular MTC UE; the N is a positive integer greater than or equal to one.

The number of SIBs that include the system parameters of the enhanced MTC UE in the N SIBs is M, where the M is a positive integer greater than or equal to 1 and less than or equal to N, preferably equal to 1 or 2; the first SIB of the M SIBs is The SIBs received in the predefined sub-frames are received according to the respective fixed scheduling period and the scheduling time window size, or the respective scheduling periods and scheduling times are obtained according to the fields in the first SIB. The window size is received; wherein the predefined subframe includes, but is not limited to, at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in the even-numbered radio frame, and subframe 0 and subframe in the odd-numbered radio frame At least one of frame 4, subframe 5, and subframe 9, and at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in all radio frames.

In this embodiment, if the network supports the MTC coverage enhancement function, the Paging message is received according to the PCCH system configuration parameter on the determined narrowband; wherein the determined narrowband is predefined or acquired according to the SIB signaling. Narrowband; and the determined narrowband and the PCCH system configuration parameters are different from the narrowband and PCCH system configuration parameters used by conventional MTC UE Paging messages.

In the case that the network supports the MTC coverage enhancement function, the Paging message is transmitted using group coding or independent coding, and is transmitted based on EPDCCH scheduling or no control operation; in the case of group coding, in any of the Paging messages, All of the coverage enhancements of the MTC UE use or have the same repetition level.

In this embodiment, when the coverage enhanced MTC UE is in the idle Idle state,

If the EPDCCH scheduling transmission mode is used, the EPDCCH of the scheduling Paging message is received in a blind detection manner according to the historical paging message repetition level, and then the Paging message is received according to the EPDCCH for scheduling the paging message; wherein the EPDCCH of the scheduling Paging message is received. The repetition level is always the same as the paging message repeating level. Specifically, first, the coverage enhanced MTC UE sequentially attempts to decode the EPDCCH of the scheduled Paging message based on the historical Paging message repetition level until the maximum Paging message repetition level until the decoding is correctly performed; the Downlink Control Information (Downlink Control Information) The size of the DCI) is a fixed value, so the EPDCCH that attempts to decode the scheduled Paging message based on determining the Paging message repetition level does not need to blindly detect the DCI size of the EPDCCH channel; then, the Paging message is decoded according to the acquired DCI information; wherein the DCI Contains the transport format of the paging message (including Paging message TBS, etc.).

If the non-control operation and the independent coding transmission mode are used, the Paging message is received in a blind detection manner according to the historical Paging message repetition level; specifically, the coverage enhanced MTC UE sequentially attempts to decode the Paging based on the historical Paging message repetition level up to the maximum Paging message repetition level. The message is not correctly decoded; wherein, since the TBS for the independently encoded Paging message is a fixed value, it is not necessary to blindly detect the Paging message TBS size based on determining the Paging message repetition level to attempt to decode the Paging message.

If the non-control operation and the grouped code transmission mode are used, the Paging message is received in a blind detection manner according to the historical Paging message repetition level and the TBS set of the potential Paging message; specifically, the coverage enhanced MTC UE is sequentially based on the historical Paging message repetition level. Until the maximum paging message repetition level attempts to decode the Paging message until correctly decoded; wherein attempting to decode the Paging message based on determining the Paging message repetition level comprises: respectively based on a possible different Paging message TBS, and the determined Paging of the TBS in the above determination The number of specific repeated transmissions under the message repetition level attempts to decode the Paging message. For example, it is assumed that there are three types of repetition levels of the paging message, and four possible TBSs of the paging message, and the number of specific repeated transmissions of the paging message with four types of TBSs at the three repetition levels can be as shown in the following table; if the historical paging message If the repetition level is the second repetition level, the coverage enhanced MTC UE may sequentially attempt to decode the Paging message based on the second repetition level and the third repetition level until correctly decoding; wherein, the attempt to decode the Paging message based on the second repetition level refers to respectively Based on the above four different Paging messages TBS and the specific repeated transmission times of the TBS at the second repetition level, the Paging message is attempted to be decoded. The attempt to decode the Paging message based on the 3Paging message repetition level refers to the TBS based on the above 4 different Paging messages respectively. And the specific number of repeated transmissions of the TBS under the third repetition level attempts to decode the Paging message.

Table 2

In this embodiment, when the network supports the MTC coverage enhancement function, the narrowband reception different from the conventional MTC UE covers all system parameters of the enhanced MTC UE; wherein the narrowband is a predefined narrowband or is carried in the PBCH. The narrowband acquired by the MIB signaling, or the narrowband implicitly determined according to the narrowband of the conventional MTC UE; the PBCH is dedicated to the coverage enhanced MTC UE or the PBCH channel dedicated to the coverage enhanced MTC UE and the regular MTC UE.

In this embodiment, the coverage enhanced MTC UE is exhausted by using a method in the channel or signal that needs to be received before receiving the PDSCH or PDCCH data when the coverage enhanced MTC UE initially accesses the network, indicating whether the network supports the MTC coverage enhancement function. It is possible to quickly acquire the support capability of the current network, and solve the problem of unnecessary power loss of the coverage enhanced MTC UE, thereby avoiding excessive power loss of the MTC UE.

FIG. 4 is a structural block diagram of an apparatus for function indication according to an embodiment of the present invention. The apparatus 1 is used for a machine type communication MTC. As shown in FIG. 4, the apparatus is located in a base station side, and the apparatus includes:

The sending module 32 is configured to send an instruction carried in a channel or a signal, where the channel or signal is a channel or a signal that needs to be received before receiving the PDSCH or PDCCH data when the UE initially accesses the network, and the instruction is used for Indicates whether the network supports a preset function, and the PDSCH data includes: PDSCH data carrying a system parameter of a broadcast of the UE, and PDSCH data carrying a unicast service.

And the instruction is used to indicate whether the network supports the preset function by using the foregoing, where the instruction is carried in a channel or a signal that needs to be received before receiving the PDSCH or the PDCCH data when the UE initially accesses the network; where the PDSCH data includes: At least the broadcasted PDSCH data and the PDSCH data carrying the unicast service solve the problem of covering unnecessary power loss of the enhanced MTC UE, thereby avoiding excessive power loss of the MTC UE. In the foregoing apparatus, the preset function includes: an MTC coverage enhancement function, and the UE is an coverage enhanced MTC UE.

FIG. 5 is a structural block diagram 2 of a device for function indication according to an embodiment of the present invention. For a machine type communication MTC, as shown in FIG. 5, located in a terminal side, the device includes:

The receiving module 42 is configured to receive, by the UE, an instruction carried in a channel or a signal, where the channel or signal is a channel or a signal that needs to be received before receiving the PDSCH or PDCCH data when the UE initially accesses the network, the instruction is used for Indicates whether the network supports a preset function, and the PDSCH data includes: PDSCH data carrying a system parameter of a broadcast of the UE and PDSCH data carrying a unicast service.

And the instruction is used to indicate whether the network supports the preset function by using the foregoing, where the instruction is carried in a channel or a signal that needs to be received before receiving the PDSCH or the PDCCH data when the UE initially accesses the network; where the PDSCH data includes: At least the broadcasted PDSCH data and the PDSCH data carrying the unicast service solve the problem of covering the unnecessary power loss of the enhanced MTC UE, thereby avoiding excessive power loss of the MTC UE. In the above apparatus, the preset function includes: an MTC coverage enhancement function, and the UE is an coverage enhanced MTC UE.

In this embodiment, a system for function indication is also provided for the machine type communication MTC, including:

The base station side includes the foregoing device on the base station side, and the device implements the method in the foregoing embodiment;

The terminal side includes the above-mentioned terminal side device, and the device implements the method in the above embodiment.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

According to the foregoing technical solution provided by the embodiment of the present invention, the UE is sent by transmitting an instruction in a channel or a signal, where the channel or signal is a channel or a signal that needs to be received before receiving the PDSCH or PDCCH data when the UE initially accesses the network. The instruction is used to indicate whether the network supports a preset function, where the PDSCH data includes: PDSCH data carrying system parameters of the broadcast of the UE, and the number of PDSCHs carrying the unicast service. According to the problem, the problem of covering the unnecessary power loss of the enhanced MTC UE is solved, thereby avoiding excessive power loss of the MTC UE.

Claims (37)

1. A method of function indication for machine type communication MTC, including:

   Transmitting, by the UE, an instruction carried in a channel or a signal, where the channel or signal is a channel or signal that needs to be received before receiving the PDSCH or PDCCH data when the UE initially accesses the network, the instruction is used to indicate the network Whether the preset function is supported, the PDSCH data includes: PDSCH data carrying a system parameter of a broadcast of the UE, and PDSCH data carrying a unicast service.
2. The method according to claim 1, wherein the preset function comprises: an MTC coverage enhancement function, and the UE is an coverage enhanced MTC UE.
3. The method of claim 2 wherein transmitting an instruction carried in a channel or signal to the UE comprises at least one of:

   Transmitting an instruction carried by the primary synchronization signal PSS to the terminal;

   Transmitting an instruction carried on the physical broadcast channel PBCH to the terminal;

   Sending an instruction carried on a preset defined physical channel to the terminal.
4. The method of claim 3, wherein the instruction is carried in the primary synchronization signal PSS, comprising:

   The sequence of the PSS is six, wherein the six PSS sequences are in one-to-one correspondence with three different cell group identifiers and six different combinations of the signaling.
5. The method of claim 3, wherein the instruction is carried in the physical broadcast channel PBCH, comprising:

   Transmitting the PBCH on a fixed orthogonal frequency division multiplexing OFDM symbol of a predefined subframe;

   In the case that the PBCH is non-existing LTE PBCH, the fixed OFDM symbol of the predefined subframe does not overlap with the resources of the existing LTE PBCH transmission.
6. The method of claim 3, wherein the instruction is carried in a preset defined physical channel, comprising:

   The preset defined physical channel is transmitted on a fixed OFDM symbol of a predefined subframe;

   The fixed OFDM symbol of the predefined subframe is the same as the resource of the existing LTE PBCH transmission, or the fixed OFDM symbol of the predefined subframe does not overlap with the resource of the existing LTE PBCH transmission.
7. The method according to claim 5 or 6, wherein the subframes that are set to be transmitted by the PBCH or the preset defined physical channel include:

   At least one of subframe 0, subframe 4, subframe 5, and subframe 9;

   a fixed OFDM symbol for the PBCH transmission, wherein, for subframes 0 and 5, when the PBCH is an existing LTE PBCH, the fixed OFDM symbol is other than an OFDM symbol occupied by a downlink control region and a synchronization signal. All or part of other OFDM symbols; otherwise, the fixed OFDM symbols are all or part of other OFDM symbols except for the OFDM symbols occupied by the existing LTE PBCH, the downlink control region and the synchronization signal; for subframes 4 and 9 The fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbol occupied by the downlink control region;

   And setting a fixed OFDM symbol for the physical channel transmission defined by the preset, when the fixed OFDM symbol does not overlap with resources of an existing LTE PBCH transmission, where, for subframes 0 and 5, the fixed OFDM symbol is All or part of other OFDM symbols than the OFDM symbols occupied by the existing LTE PBCH, the downlink control region, and the synchronization signal; for subframes 4 and 9, the fixed OFDM symbols are other than the OFDM symbols occupied by the downlink control region. All or part of other OFDM symbols.
8. The method of claim 2, comprising:

   In the case that the network supports the MTC coverage enhancement function, the system parameters of the coverage enhanced MTC UE are transmitted on the same narrowband as the system parameters of the conventional MTC UE, wherein the narrowband is a predefined narrowband or is carried by a bearer. a narrow band indicated by the primary information block MIB signaling in the PBCH;

   The total number of system information blocks SIBs sent by the network on the narrowband is N, wherein any one of the N SIBs includes a system parameter that covers an enhanced MTC UE and/or a system parameter of a regular MTC UE;

   The N is a positive integer greater than or equal to 1.
9. The method of claim 8 comprising:

   The first SIB of the N SIBs are transmitted on a predefined subframe, and the other SIBs except the first SIB are transmitted according to respective fixed scheduling periods and scheduling time window sizes, or according to the first SIB. The respective scheduling period and scheduling time window size indicated by the field are transmitted;

   The predefined subframe includes, but is not limited to, at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in an even radio frame, and subframe 0, subframe 4, and subframe in an odd radio frame. At least one of frame 5 and subframe 9, and at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in all radio frames.
10. The method of claim 9 comprising:

    When the N is equal to 1,

    The unique SIB includes all system parameters of the coverage enhanced MTC UE and all system parameters of the regular MTC UE;

    When the N is greater than 1,

    The first SIB of the N SIBs includes system parameters shared by the coverage enhanced MTC UE and the regular MTC UE, or the system parameters shared by the coverage enhanced MTC UE and the regular MTC UE and used to control other SIBs a necessary parameter of the transmission; any one of the N SIBs other than the first SIB includes a system parameter dedicated to the coverage enhanced MTC UE, or a system parameter dedicated to a regular MTC UE; The necessary parameters for controlling other SIB transmissions include, but are not limited to, scheduling period and scheduling time window size and transmission format.
11. The method of claim 10, comprising:

    In the case where N is 2,

    The first SIB includes system parameters shared by the coverage enhanced MTC UE and the regular MTC UE, or system parameters shared by the coverage enhanced MTC UE and the regular MTC UE, and necessary parameters for controlling the second SIB transmission; And, the second SIB includes system parameters specific to the coverage enhanced MTC UE.
12. The method of claim 10, comprising:

    In the case where the N is 3,

    The first SIB includes system parameters shared by the coverage enhanced MTC UE and the regular MTC UE, or system parameters shared by the coverage enhanced MTC UE and the regular MTC UE, and used to control the second and third SIB transmissions. The necessary parameters; and the second and third SIBs or the third and second SIBs respectively include system parameters specific to the coverage enhanced MTC UE and the regular MTC UE.
13. The method of claim 2, comprising:

    In the case that the network supports the MTC coverage enhancement function, the paging Paging message of the coverage enhanced MTC UE and the Paging message of the regular MTC UE are transmitted on different narrowbands, and the coverage enhanced MTC UE and the regular MTC UE have different Paging control channel PCCH system configuration parameters; wherein the different narrowbands are predefined or indicated by the SIB signaling.
14. The method of claim 2, comprising:

    In the case where the network supports the MTC coverage enhancement function,

    The Paging message uses group coding or independent coding, and the Paging message is transmitted by using an enhanced downlink control channel EPDCCH scheduling or no control operation;

    In the case of group coding, in any of the Paging messages, all of the coverage enhanced MTC UEs that are simultaneously paged use or have the same repetition level.
15. The method of claim 14 comprising:

    Obtaining an indication that the UE is in an idle Idle state and a history Paging message repetition level;

    When it is determined that the UE is in an idle Idle state, the Paging message follows a non-control operation transmission mode, and starts from the historical Paging message repetition level, and sequentially repeats all Paging messages over the historical Paging message repetition level. The level attempts to transmit a Paging message until receiving uplink data from the UE;

    When it is determined that the UE is in an idle Idle state, the Paging message follows a transmission mode scheduled by the EPDCCH, and starts from the historical Paging message repetition level, and sequentially repeats all Paging messages above the historical Paging message repetition level. The level attempts to transmit the EPDCCH scheduling the Paging message and the corresponding Paging message until the uplink data from the UE is received.
16. The method of claim 2, comprising:

    In the case that the network supports the MTC coverage enhancement function, the system parameters of the coverage enhanced MTC UE and the system parameters of the regular MTC UE are transmitted in different narrowbands; wherein, by the MIB signaling indication carried in the PBCH, or The coverage enhanced MTC UE narrowband is predefined; or the coverage enhanced MTC UE narrowband is implicitly determined by a conventional MTC UE narrowband.
17. The method according to any one of claims 2 to 16, wherein the system parameters of the coverage enhanced MTC UE comprise at least one of the following:

    a parameter indicating a time-frequency location of the repeatedly transmitted physical random access channel PRACH, indicating a parameter of a preset defined PRACH format, indicating a parameter of an available subframe of the paging message, and indicating a repeated transmission resource or a repeated transmission level of the physical channel / number of parameters.
18. A method of function indication, in machine type communication MTC, includes:

    The UE receives an instruction carried in a channel or a signal, where the channel or signal is a channel or a signal that needs to be received before receiving the PDSCH or PDCCH data when the UE initially accesses the network, the instruction is used to indicate whether the network is Supporting a preset function, the PDSCH data includes: PDSCH data carrying a system parameter of a broadcast of the UE, and PDSCH data carrying a unicast service.
19. The method according to claim 18, wherein the preset function comprises: an MTC coverage enhancement function, and the UE is an coverage enhanced MTC UE.
20. The method of claim 19 wherein receiving the instructions carried in the channel or signal comprises at least one of:

    Receiving an instruction carried on the primary synchronization signal PSS;

    Receiving an instruction carried on a physical broadcast channel PBCH;

    Receiving an instruction carried on a preset defined physical channel.
21. The method of claim 20, wherein the instruction is carried in the primary synchronization signal PSS, comprising:

    The sequence of the PSS is six, wherein the six PSS sequences are in one-to-one correspondence with three different cell group identifiers and six different combinations of the signaling.
22. The method according to claim 20, wherein, in the case that the instruction is carried on the physical broadcast channel PBCH, the method comprises:

    The PBCH is received on a fixed orthogonal frequency division multiplexing OFDM symbol of a predefined subframe;

    In the case that the PBCH is non-existing LTE PBCH, the fixed OFDM symbol of the predefined subframe does not overlap with the resource that receives the existing LTE PBCH.
23. The method of claim 20, wherein the instruction is carried in a preset defined physical channel, comprising:

    The preset defined physical channel is received on a fixed OFDM symbol of a predefined subframe; wherein the fixed OFDM symbol of the predefined subframe is the same as the resource that receives the existing LTE PBCH, or the predefined subframe The fixed OFDM symbol does not overlap with the resource that receives the existing LTE PBCH.
24. The method according to claim 22 or 23, wherein the subframes received for the PBCH or the preset defined physical channel include:

    At least one of subframe 0, subframe 4, subframe 5, and subframe 9;

    a fixed OFDM symbol received for the PBCH, wherein, for subframes 0 and 5, when the PBCH is an existing LTE PBCH, the fixed OFDM symbol is other than an OFDM symbol occupied by a downlink control region and a synchronization signal. All or part of other OFDM symbols; otherwise, the fixed OFDM symbols are all or part of other OFDM symbols except for the OFDM symbols occupied by the existing LTE PBCH, the downlink control region and the synchronization signal; for subframes 4 and 9 The fixed OFDM symbol is all or part of other OFDM symbols except the OFDM symbol occupied by the downlink control region;

    And setting a fixed OFDM symbol received by the physical channel defined by the preset, when the fixed OFDM symbol does not overlap with resources of an existing LTE PBCH transmission, where, for subframes 0 and 5, the fixed OFDM symbol is All or part of other OFDM symbols than the OFDM symbols occupied by the existing LTE PBCH, the downlink control region, and the synchronization signal; for subframes 4 and 9, the fixed OFDM symbols are other than the OFDM symbols occupied by the downlink control region. All or part of other OFDM symbols.
25. The method according to claim 20, wherein, when the preset defined physical channel is used, the order in which the coverage enhanced MTC UE initially accesses the network to receive signals or channels comprises:

    First receiving a synchronization signal, and then receiving a preset defined physical channel, and other physical channels;

    The synchronization signal includes a PSS and a secondary synchronization signal SSS;

    The other physical channels include: an enhanced downlink control channel EPDCCH, a PBCH, and a PDSCH.
26. The method of claim 19, comprising:

    When the coverage enhanced MTC UE determines, according to the instruction, that the MTC coverage enhancement function is not supported by the network, the coverage enhanced MTC UE abandons access to the network.
27. The method of claim 19, comprising:

    If the network supports the MTC coverage enhancement function, the system parameters of the coverage enhanced MTC UE are received in a narrowband shared with the regular MTC UE; wherein the narrowband is a predefined narrowband or is carried according to the PBCH a narrow band obtained by the main information block MIB signaling;

    The total number of system information blocks SIBs transmitted by the network on the narrowband is N, wherein any one of the N SIBs includes system parameters covering the enhanced MTC UE and/or system parameters of the regular MTC UE;

    The N is a positive integer greater than or equal to 1.
28. The method of claim 27, comprising:

    The number of SIBs including the coverage enhanced MTC UE system parameters in the N SIBs is M,

    Wherein M is a positive integer greater than or equal to 1 and less than or equal to N;

    The first SIBs of the M SIBs are received in a predefined subframe, and other SIBs except the first SIB are received according to respective fixed scheduling periods and scheduling time window sizes, or, according to the first SIB. The fields are obtained by receiving respective scheduling periods and scheduling time window sizes;

    The predefined subframe includes, but is not limited to, at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in an even radio frame, and subframe 0, subframe 4, and subframe in an odd radio frame. At least one of frame 5 and subframe 9, and at least one of subframe 0, subframe 4, subframe 5, and subframe 9 in all radio frames.
29. The method of claim 19, comprising:

    The network supports the MTC coverage enhancement function, and receives a Paging message according to the PCCH system configuration parameter on the determined narrowband; wherein the determined narrowband is predefined or narrowband acquired according to the SIB signaling; The determined narrowband and the PCCH system configuration parameters are different from the narrowband and PCCH system configuration parameters used by conventional MTC UE Paging messages.
30. The method of claim 19, comprising:

    In the case where the network supports the MTC coverage enhancement function,

    The Paging message is transmitted in a manner of group coding or independent coding, and enhanced downlink control channel EPDCCH scheduling or no control operation;

    In the case of group coding, in any of the Paging messages, all of the coverage enhanced MTC UEs that are simultaneously paged use or have the same repetition level.
31. The method of claim 30, comprising:

    When the coverage enhanced MTC UE is in an idle Idle state,

    If the EPDCCH scheduling transmission mode is used, the EPDCCH that schedules the paging message is received in a blind detection manner according to the historical Paging message repetition level, and then the Paging message is received according to the EPDCCH for scheduling the paging message;

    If the non-control operation and the independent code transmission mode are used, the Paging message is received in a blind detection manner according to the historical Paging message repetition level;

    If based on the no-control operation and the group-encoded transmission mode, the Paging message is received in a blind detection manner according to the historical Paging message repetition level and the TBS set of the potential Paging message.
32. The method of claim 19, comprising:

    In the case where the network supports the MTC coverage enhancement function,

    Receiving, by a narrowband different from the conventional MTC UE, the system parameter of the coverage enhanced MTC UE; wherein the narrowband is a predefined narrowband, or according to a narrowband acquired by MIB signaling carried in the PBCH, or A narrow band implicitly determined by a narrow band of a conventional MTC UE.
33. A function indicating device for machine type communication MTC, comprising:

    a sending module, configured to send an instruction carried in a channel or a signal, where the channel or signal is a channel or a signal that needs to be received before receiving the PDSCH or PDCCH data when the UE initially accesses the network, The instruction is used to indicate whether the network supports a preset function, and the PDSCH data includes: PDSCH data that carries a broadcast system parameter of the UE, and PDSCH data that carries a unicast service.
34. The apparatus according to claim 33, wherein the preset function comprises: an MTC coverage enhancement function, and the UE is an coverage enhanced MTC UE.
35. A function indicating device for machine type communication MTC, comprising:

    a receiving module, configured to receive, by the UE, an instruction carried in a channel or a signal, where the channel or signal is a channel or a signal that needs to be received before receiving the PDSCH or PDCCH data when the UE initially accesses the network, where the Instructing whether the network supports a preset function, the PDSCH data includes: PDSCH data carrying a system parameter of a broadcast of the UE, and PDSCH data carrying a unicast service.
36. The apparatus according to claim 35, wherein the preset function comprises: an MTC coverage enhancement function, and the UE is an coverage enhanced MTC UE.
37. A functional indication system for machine type communication MTC, including:

    The base station side includes the apparatus of any one of claims 33 to 34;

    The terminal side includes the apparatus of any one of claims 35 to 36.

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