WO2013189228A1

WO2013189228A1 - Control channel resource mapping method, apparatus and system

Info

Publication number: WO2013189228A1
Application number: PCT/CN2013/076311
Authority: WO
Inventors: 武雨春
Original assignee: 华为技术有限公司
Priority date: 2012-06-21
Filing date: 2013-05-28
Publication date: 2013-12-27
Also published as: CN103516466A; CN103516466B

Abstract

Embodiments of the present invention provide a control channel resource mapping method, apparatus and system, relate to the communications field and can solve the problem of mismatching between the length of control channel coded and rate matched output data and the data length that can be contained in a control channel physical subunit in a case where the data length that can be placed in the mapped control channel physical subunit is unknown. The method comprises: determining a reference value of the number of REs of the control channel physical subunit; determining the length of ePDCCH coded and rate matched data, mapping the ePDCCH coded and rate matched data as a symbol sequence; according to the ePDCCH, selecting a certain number of symbols from the symbol sequence to perform symbol repetition or symbol puncture on the total actual number of the REs of the to-be-mapped control channel physical subunit and the length of the ePDCCH coded and rate matched data to form a new symbol sequence; and mapping the new symbol sequence to a corresponding control channel physical subunit. The embodiments of the present invention are applied to channel resource mapping.

Description

Method, device and system for mapping control channel resources The present application claims to be submitted to the Chinese Patent Office on June 21, 2012, the application number is 201210208436.0, and the invention is entitled "a control channel resource mapping method, device and system" Chinese patent Priority of the application, the entire contents of which are incorporated herein by reference.

Technical field

The present invention relates to the field of communications, and in particular, to a control channel resource mapping method, apparatus, and system.

Background technique

In LTE (Long Term Evolution) Rel-1 (version 1 1), due to CoMP (Coordinated Multiple Points), MU-MIMO (Multi-User Transmission) enhancement, etc., PDCCH (physical downlink) The capacity of the control channel, the physical downlink control channel, becomes the bottle that limits the increase in system throughput. Therefore, the capacity of the PDCCH is further enhanced in the 3GPP (The 3rd Generation Partnership Project), and the enhanced PDCCH channel is called an enhanced physical downlink control channel (ePDCCH), that is, in the original PDSCH. Some resources in the (physical downlink shared channel) are used as ePDCCH. Just as the PDCCH is composed of one or more CCEs (control channel elements) or REGs (resource unit groups), the ePDCCH will consist of one or more eCCEs (Enhanced CCEs) or eREGs (Enhanced REGs).

When channel coding is performed on the PDCCH, the number of REs and the modulation mode of each CCE/REG are fixed, that is, the number of RE (resource elements) in each CCE/REG is 36, and the modulation mode is QP SK (quarature) Phase shift keying, orthogonal phase shift keying, so each CCE can be placed 72bits. Then, for each PDCCH, once the number of corresponding CCEs is determined, the data length after encoding and rate matching is determined, and the data length and mapping after the encoding and rate matching are determined. The resources arrived must match. For example, if the number of CCEs corresponding to one PDCCH is 4, the data length after channel coding and rate matching is determined to be 4*72=288 bits.

For eCCE/eREG, the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols occupied by the control channel due to CRS (Cell-Specific Reference Signal), C SI-RS (Channel State Information - Reference Signal) port number, DMRS Port The number of demodulation reference signal ports (demodulation reference signal port) is not determined, so that the number of REs included in each eCCE/eREG cannot be known in advance when encoding the ePDCCH channel, which may result in the length of the data after the ePDCCH channel coding and rate matching. The resources that will be mapped do not match. Taking the ePDCCH channel coding implemented by the existing technology as an example, when there are only 1 to 2 DMRS ports, the number of REs that eCCE 1 can use for ePDCCH mapping is 24, and when there are 3 to 4 DMRS ports, eCCE l is available. The number of REs mapped to the ePDCCH is 22.

In addition, the number of DMRS ports is fixed, and the number of REs that can be used for ePDCCH transmission by each eCCE in a PRB pair (Physical Resource Block Pair) is also not fixed.

In the above process, the ePDCCH is not able to determine which eCCEs the ePDCCH is ultimately mapped to during channel coding and rate matching, or it is difficult to determine the data length after ePDCCH coding and rate matching, or the data length after coding and rate matching. The length of the data that can be placed on the eCCE does not match when mapping to the eCCE. Summary of the invention

Embodiments of the present invention provide a control channel resource mapping method, apparatus, and system, which can solve the control channel coding and rate matching output length caused by not knowing the data length that the finally mapped control channel physical subunit can be placed. The problem of the data length that can be accommodated by the physical subunit of the control channel mapped to it does not match.

In order to achieve the above objectives, embodiments of the present invention adopt the following technical solutions:

In one aspect, a method for mapping a control channel resource is provided, including:

Determining the number of resource units RE of the physical subunit of the control channel according to the number of cell-specific reference signal CRS ports of the current subframe, the number of symbols occupied by the control channel, the number of channel state information reference signals CSI-RS ports, and the number of demodulation reference signals DMRS ports Reference value; according to the modulation mode of the enhanced physical downlink control channel, the aggregation level, and the control The RE number reference value of the channel physical sub-unit determines the data length after the enhanced physical downlink control channel coding and rate matching, and maps the enhanced physical downlink control channel coding and the rate matched data into a symbol sequence, where the data length is equal to a product of the number of symbols of the symbol sequence and the number of bits corresponding to each symbol;

Selecting a certain number in the symbol sequence according to the total number of REs of the physical subunits of the control channel to which the enhanced physical downlink control channel is to be mapped and the data length of the enhanced physical downlink control channel coding and rate matching. a symbol repeating or symbol puncturing to form a new symbol sequence, the number of symbols in the new symbol sequence being equal to the total number of total REs of the physical subunit of the control channel;

Mapping the new sequence of symbols onto a corresponding control channel physical subunit. A method for mapping control channel resources is also provided, including:

Determining the number of resource units RE of the physical subunit of the control channel according to the number of cell-specific reference signal CRS ports of the current subframe, the number of symbols occupied by the control channel, the number of channel state information reference signals CSI-RS ports, and the number of demodulation reference signals DMRS ports a reference value; determining, according to a modulation mode of the enhanced physical downlink control channel, a convergence level, and a RE number reference value of the physical subunit of the control channel, a data length of the enhanced physical downlink control channel coding and rate matching, where The data length is the number of symbols of the symbol sequence of the enhanced physical downlink control channel coding and the rate matched data mapping multiplied by the number of bits corresponding to each symbol in the symbol sequence;

And the data length after the demodulation of the enhanced physical downlink control channel and the data length of the enhanced physical downlink control channel coding and rate matching of the current blind detection, in the symbol sequence after demodulation of the enhanced physical downlink control channel Selecting the puncturing symbols at the puncturing symbols, inserting 0 or squaring, picking out the repeated symbols at each repeated symbol and combining them into one symbol to form a new symbol sequence, the data length in the new symbol sequence is equal to the enhanced physics Downlink control channel coding and data length after rate matching;

The new symbol sequence is output to a de-rate matching and decoding module for decoding. In one aspect, a transmitter is provided, comprising:

a resource estimating unit, configured to use, according to the cell-specific reference signal CRS port number of the current subframe, the number of symbols occupied by the control channel, and the channel state information reference signal CSI-RS end The number of ports and the number of DMRS ports of the demodulation reference signal determine the reference number of the resource unit RE of the physical subunit of the control channel;

a coding unit, configured to determine, according to a modulation mode of the enhanced physical downlink control channel, an aggregation level, and a RE number reference value of the physical subunit of the control channel, an enhanced physical downlink control channel coding and a data length after the rate matching, and the enhanced physical Downlink control channel coding and rate matched data are mapped into a symbol sequence, wherein the data length is equal to a product of a number of symbols of the symbol sequence and a number of bits corresponding to each symbol;

And an adjusting unit, configured to: according to the total number of real REs of the control channel physical subunit to which the enhanced physical downlink control channel is to be mapped, and the enhanced physical downlink control channel coding and rate matching data length in the symbol sequence Picking out a certain number of symbols for symbol repetition or symbol puncturing to form a new symbol sequence, the number of symbols in the new symbol sequence being equal to the total number of REs of the control channel physical subunit;

a mapping unit, configured to map the new symbol sequence to a corresponding control channel physical subunit.

A receiver is also provided, including:

a resource estimation unit, configured to determine, according to a cell-specific reference signal CRS port number of the current subframe, a number of symbols occupied by the control channel, a channel state information reference signal CSI-RS port number, and a demodulation reference signal DMRS port number, a control channel physical section The reference number of the resource unit RE of the unit;

a parameter estimation unit, configured to determine, according to a modulation mode, an aggregation level, and a RE number reference value of the physical subunit of the control channel of the current blind detection, an enhanced physical downlink control channel coding and a data length after the rate matching The data length is the number of symbols of the symbol sequence of the enhanced physical downlink control channel coding and the rate matched data mapping multiplied by the number of bits corresponding to each symbol in the symbol sequence;

And an adjusting unit, configured to demodulate the enhanced physical downlink control channel according to the data length after the demodulation of the enhanced physical downlink control channel and the enhanced physical downlink control channel coding and rate matching of the current blind detection. After the symbol sequence Evenly picking out the puncturing symbols, inserting 0 or squaring, picking out the repeated symbols at each repeating symbol and combining them into one symbol to form a new symbol sequence, the data length in the new symbol sequence is equal to the enhanced physical downlink Control channel coding and data length after rate matching;

And an output unit, configured to output the new symbol sequence to a de-rate matching and decoding module for decoding.

In one aspect, a network system is provided, comprising any of the transmitters described above and any of the receivers described above.

Embodiments of the present invention provide a control channel resource mapping method, apparatus, and system, which are capable of causing control channel coding and rate matching output length and mapping without knowing the data length that the finally mapped control channel physical subunit can place. The data lengths that the control channel physical subunits can accommodate match, and the resources of the control channel are effectively utilized for data transmission.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

FIG. 1 is a schematic flowchart of a control channel resource mapping method according to an embodiment of the present invention;

2 is a schematic flowchart of a method for mapping a control channel resource according to another embodiment of the present invention;

3 is a schematic structural diagram of a transmitter according to an embodiment of the present invention;

4 is a schematic structural diagram of a transmitter according to another embodiment of the present invention; FIG. 5 is a schematic structural diagram of a receiver according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a receiver according to another embodiment of the present invention. detailed description The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.

Referring to the prior art for the transmission process of the ePDCCH signal, the transmitter as the transmitting end device encodes the ePDCCH signal into a symbol sequence and maps it to the eCCE/eREG, and then transmits it to the receiver as the receiving end device, and the receiver receives the received signal. The ePDCCH signal is demodulated and decoded. The present invention does not limit the process of the above signal transmission. The embodiment of the present invention only controls the channel resource mapping when the same ePDCCH signal is respectively transmitted at the transmitting end device and when transmitted to the receiving end device.

Referring to FIG. 1 , a method for mapping a control channel resource according to an embodiment of the present invention includes the following steps on a transmitter side:

The S10 transmitter determines the physical subunit of the control channel according to the number of cell-specific reference signals CRS ports of the current subframe, the number of symbols occupied by the control channel, the number of channel state information reference signals C SI-RS ports, and the number of demodulation reference signals DMRS ports. Resource unit E number reference value.

Here, the reference number of the resource unit RE of the control channel physical subunit is denoted as ^re f . Optionally, the control channel physical subunit includes: an enhanced control channel unit eCCE, an enhanced resource element group e EG (Enhanced Resource Element Group); where the CRS is a cell-specific reference signal, and the CSI-RS is Channel state information-reference signals; where the resource unit RE number of the control channel physical sub-unit reference value is the number of all REs in the current subframe minus the number of cell-specific reference signals CRS ports of the current subframe The number of symbols occupied by the control channel, the number of channel state information reference signals C SI-RS ports, and the number of demodulation reference signals DMRS ports divided by the number of control channel physical subunits; since one subframe contains multiple resource elements a control channel physical subunit composed of REs (in the embodiment of the present invention, eCCE or eREG), wherein the number of DMRS ports in each control channel subunit is uncertain, so each The RE of the control channel physical sub-unit is also uncertain. Therefore, in the embodiment of the present invention, the number of resource units RE of each control channel physical sub-unit is represented by the resource unit RE number reference value of the control channel physical sub-unit.

5102. Determine, according to a modulation mode of the enhanced physical downlink control channel, a convergence level, and a RE number reference value of the physical subunit of the control channel, an enhanced physical downlink control channel coding and a data length after the rate matching, and enhance the physical downlink control channel coding and The rate matched data is mapped to a sequence of symbols, where the length of the data is equal to the product of the number of symbols of the sequence of symbols and the number of bits corresponding to each symbol.

Optionally, the data length is a product of a RE number reference value of the control channel physical subunit and a modulation mode and an aggregation level, and is recorded as a data length = ^M * ^re f - ^Ε ' ^eREG , where Α is an aggregation level, and M is each The number of bits corresponding to each RE, when the modulation mode is QPSK modulation, M=2, when the modulation mode is 16Q AM (Quadature Amplitude Modulation) modulation, Μ=4, when the modulation mode is 64QAM modulation, M=6.

5103. Pick a certain number of symbols in the symbol sequence according to the total number of REs of the physical subunits of the control channel to which the enhanced physical downlink control channel is to be mapped and the data length of the enhanced physical downlink control channel coding and rate matching. A repetition or symbol puncturing forms a new sequence of symbols, the number of symbols in the new symbol sequence being equal to the total number of total REs of the control channel physical subunit.

Here, the actual number of REs that may be included in the physical subunit of the control channel to which the physical downlink control channel is to be mapped may be greater than the number of symbols of the symbol sequence of the data mapping after the enhanced physical downlink control channel coding and rate matching, and it is also possible to enhance the physical. The actual number of REs that may be included in the physical subunit of the control channel to which the downlink control channel is to be mapped may be smaller than the number of symbols of the symbol sequence of the data mapping after the enhanced physical downlink control channel coding and rate matching;

Therefore, when the number of symbols in the symbol sequence is smaller than the actual number of REs of the physical subunit of the control channel to which the enhanced physical downlink control channel is to be mapped, the first number of symbols are uniformly extracted from the symbol sequence for symbolization. Repeating, forming a new sequence of symbols, where the first number is the control channel to which the enhanced physical downlink control channel is to be mapped The actual number of REs of the physical subunit minus the number of symbols corresponding to the symbol sequence of the data mapping after enhancing the physical downlink control channel coding and rate matching; mapping the enhanced physical downlink control channel ePDCCH coding and rate matching data into a symbol sequence after S 102 seen from the number of symbols in the sequence formula of E / M, the physical channel subunit however, assuming that _e PDCCH is mapped to the actual total number of RE is K, when / M <, from / M th Uniformly pick out symbols in the symbol for symbol repetition;

Or,

When the number of symbols in the symbol sequence is greater than the actual number of REs of the physical subunits of the control channel to which the physical downlink control channel is to be mapped, the second number of symbols are uniformly picked out in the symbol sequence for symbol puncturing to form a new one. a sequence of symbols, wherein the second number is the number of symbols corresponding to the symbol sequence of the enhanced physical downlink control channel coding and the rate matched data mapping minus the total RE real number of the control channel physical subunit to which the enhanced physical downlink control channel is to be mapped The data of the enhanced physical downlink control channel ePDCCH coding and rate matching is mapped to a symbol sequence, and the number of symbols in the sequence is EIM, but the total physical subunit of the control channel to which the ePDCCH is to be mapped is assumed. The actual number of REs is K. When ΕίΜ≥Κ^, j^ E/M symbols, E/MK symbols are evenly picked out for symbol puncturing.

Of course, the symbol puncturing here is a compression mode in spread spectrum communication, that is, some bits in the bit stream are deleted, so that the symbols in the data stream are moved forward, based on the technology, rate matching can be achieved, but the reception is not affected. The normal decoding of the end device; in addition, the location of the punching is calculated by the receiving device according to an algorithm.

S104. Map the new symbol sequence to the corresponding control channel physical subunit. Embodiments of the present invention provide a control channel resource mapping method, which can solve the control channel coding and rate matching output length and the mapped control channel caused by not knowing the data length that the finally mapped control channel physical subunit can be placed. The problem that the physical subunits can accommodate data length mismatches.

Referring to FIG. 2, a control channel resource mapping method, on the receiver side, includes:

S201. The CRS port number and the control signal according to the cell-specific reference signal of the current subframe. The number of symbols occupied by the channel, the number of channel state information reference signals CSI-RS ports, and the number of demodulation reference signals DMRS ports determine the reference number of resource unit REs of the physical subunits of the control channel.

The number of symbols occupied by the physical downlink control channel can be obtained by detecting the physical control format detection channel, and can also be obtained by other methods. Here, only a conventional scheme is provided; where the number of resource units RE of the control channel physical subunit is referenced. The value is recorded as ^e f- ^N ^ . Optionally, the control channel physical subunit includes: an enhanced control channel unit _e CCE, an enhanced resource element group eREG (Enhanced Resource Element Group); where CRS is a cell-specific reference signal, C SI-RS Channel state information-reference signals; where the reference number of resource elements RE of the control channel physical sub-unit is the number of all REs in the current subframe minus the cell-specific reference signal CRS port of the current subframe Number, the number of symbols occupied by the control channel, the channel state information reference signal C SI-RS port number, and the number of demodulation reference signals DMRS ports divided by the number of control channel physical subunits; since one subframe contains multiple resources a control channel physical subunit consisting of a unit RE (in the embodiment of the present invention, eCCE or eREG), wherein the number of DMRS ports in each control channel subunit is uncertain, so the RE of each control channel physical subunit is also uncertain. Therefore, in the embodiment of the present invention, reference is made to the number of resource units RE of the control channel physical subunit. Characterized the number of physical resource elements RE each control channel subunits.

S202. Determine, according to the current modulation mode, the convergence level, and the RE number reference value of the physical subunit of the control channel, the data length of the enhanced physical downlink control channel coding and the rate matching, where the data length is enhanced. The number of symbols of the symbol sequence of the physical downlink control channel coding and the rate matched data mapping is multiplied by the number of bits corresponding to each symbol in the symbol sequence.

Optionally, the data length is a product of a RE number reference value of the control channel physical subunit and a modulation mode and an aggregation level, and is recorded as a data length = ^M * ^re f - ^NE ' ^eREG , where A is an aggregation level, and M is each The number of bits corresponding to each RE, when the modulation mode is QPSK modulation, M=2; when the modulation mode is 16QAM modulation, M=4; when modulation When the mode is 64QAM modulation, M=6.

S203. Select, according to the data length after the demodulation of the enhanced physical downlink control channel, the enhanced physical downlink control channel coding and the data length after the current blind detection, and the symbol sequence in the enhanced physical downlink control channel demodulation. Inserting 0 at the punctured symbol or uniformly picking out the repeated symbols at each repeated symbol and combining them into one symbol to form a new symbol sequence. The data length in the new symbol sequence is equal to the enhanced physical downlink control channel coding and rate matching. The length of the data.

Optionally, the data length after the demodulation of the enhanced physical downlink control channel is smaller than the data length of the enhanced physical downlink control channel coding and the rate matching after the current blind detection, and is uniform in the symbol sequence after the demodulation of the enhanced physical downlink control channel. Inserting a third number of puncturing symbols into the 0, wherein the third number is the number of symbols of the symbol sequence of the enhanced physical downlink control channel coding and rate matching data mapping of the current blind detection minus the enhanced physical downlink control channel The number of symbols in the demodulated symbol sequence; if the total number of REs of the control channel physical subunit of the current blind detection is K, then the symbol sequence after demodulation of the enhanced physical downlink control channel is. , ^' -1}, ^ ΕΙΜ ≥ Κ , insert 0 at the puncturing symbol evenly picked out from the 符号 symbols; for example /M = ⁵ 0, = ⁴⁸ , then input to the ePDCCH solution rate after the above operation The sequence of the matching and decoding module is {a ₀ , a - a _i , 0, α _{; +1} · · · _{; +24} , 0, a _i+25 - - - a _K _ _x } ^ El Μ symbol; ,

After the data length of the enhanced physical downlink control channel demodulation is greater than the data length of the enhanced physical downlink control channel coding and the rate matching after the current blind detection, the symbol sequence of the enhanced physical downlink control channel is uniformly selected. The symbols of the four number of symbol repetitions are weighted and averaged into one symbol, wherein the fourth number is the number of symbols in the symbol sequence after demodulation of the enhanced physical downlink control channel minus the enhanced physical downlink control channel coding of the current blind detection and The number of symbols of the symbol sequence of the data matching after the rate matching; assuming that the total number of REs of the physical subunit of the control channel of the current blind detection is Κ, the sequence of symbols in the symbol sequence after demodulation of the enhanced physical downlink control channel is

When /M<, the repeated symbols are uniformly picked out from the K symbols, and the repeated symbols are weighted and averaged into one symbol; for example E/M = 46, K = 48^ Then the sequence 歹'J input to the ePDCCH de-rate matching and decoding module after the above operation is { ^α 0, ^Ο Γ·· ^α ί— l, ( ^a ! ^+a _{! +} i) ^/2 , ^a _!+ 2 ''' ^a _i+ 23,(A ₊ 24 ⁺ " _!+ 2 ₅ ) ^{/ 2} '" _!+ 26,''' — 1'} total^/Λ / symbols .

S204. Output a new symbol sequence to the de-rate matching and decoding module for decoding. Here that is decoded by the above-described co-operation of the output symbols as an input de-rate matching and decoding _e PDCCH module.

Embodiments of the present invention provide a control channel resource mapping method, apparatus, and system, which are capable of solving control channel coding and rate matching output length and mapping caused by not knowing the data length that the finally mapped control channel physical subunit can place. The problem that the data channel of the control channel physical subunit can accommodate does not match.

Referring to FIG. 3, a transmitter 3 according to an embodiment of the present invention includes: a resource estimating unit 31, an encoding unit 32, an adjusting unit 33, and a mapping unit 34, where: a resource estimating unit 31, configured to use a current subframe according to a current subframe The cell-specific reference signal CRS port number, the number of symbols occupied by the control channel, the channel state information reference signal CSI-RS port number, and the demodulation reference signal DMRS port number determine the resource unit RE number reference value of the control channel physical subunit;

The encoding unit 32 is configured to determine, according to the modulation mode of the enhanced physical downlink control channel, the aggregation level, and the RE number reference value of the physical subunit of the control channel, the data length of the enhanced physical downlink control channel coding and the rate matching, and the physical downlink is enhanced. The control channel coding and the rate matched data are mapped into a symbol sequence, wherein the data length is equal to the product of the number of symbols of the symbol sequence and the number of bits corresponding to each symbol;

The adjusting unit 33 is configured to select, according to the total number of REs of the physical subunit of the control channel to which the enhanced physical downlink control channel is to be mapped, and the data length of the enhanced physical downlink control channel coding and the rate matching, in the symbol sequence A certain number of symbols perform symbol repetition or symbol puncturing to form a new symbol sequence, and the number of symbols in the new symbol sequence is equal to the total number of REs of the control channel physical subunit;

The mapping unit 34 is configured to map the new symbol sequence to the corresponding control channel physical subunit.

Embodiments of the present invention provide a transmitter that can be resolved without knowing the final mapping The control channel coding and rate matching output length caused by the data length of the control channel physical subunit can be mismatched with the data length that the mapped control channel physical subunit can accommodate.

Optionally, as shown in FIG. 4, the adjusting unit 33 includes:

Repeating sub-unit 33 1 for uniformly picking out the first number in the symbol sequence when the number of symbols in the symbol sequence is less than the actual number of REs of the control channel physical sub-unit to which the physical downlink control channel is to be mapped The symbols are symbol-repeated to form a new sequence of symbols, where the first number is the actual number of REs of the physical subunits of the control channel to which the enhanced physical downlink control channel is to be mapped minus the number of symbols in the sequence of symbols;

and / or,

The puncturing subunit 332 is configured to uniformly select the second number of symbols from the symbol sequence when the number of symbols in the symbol sequence is greater than the total number of REs of the control channel physical subunit to which the enhanced physical downlink control channel is to be mapped. A symbol puncturing is performed to form a new symbol sequence, wherein the second number is the number of symbols in the symbol sequence minus the total number of REs of the control channel physical subunit to which the enhanced physical downlink control channel will be mapped.

Referring to FIG. 5, an embodiment of the present invention provides a receiver 5, including: a resource estimation unit 51, a blind detection parameter estimation unit 52, an adjustment unit 53 and an output unit 54, wherein:

The resource estimating unit 51 is configured to determine, according to the number of cell-specific reference signal CRS ports of the current subframe, the number of symbols occupied by the control channel, the number of channel state information reference signals C SI-RS ports, and the number of demodulation reference signals DMRS ports, the control channel physics The reference number of the resource unit RE of the subunit;

The parameter estimating unit 52 is configured to determine, according to the modulation mode, the convergence level, and the RE number reference value of the physical subunit of the control channel of the current blind detection, the enhanced physical downlink control channel coding and the rate matched data. Length, where the data length is the number of symbols of the symbol sequence of the data mapping after enhancing the physical downlink control channel coding and rate matching, multiplied by the number of bits corresponding to each symbol in the symbol sequence;

The adjusting unit 53 is configured to perform data demodulation according to the enhanced physical downlink control channel And the data length of the current physical downlink control channel coding and rate matching of the blind detection. In the symbol sequence after demodulation of the enhanced physical downlink control channel, the key is selected and the 0 or the hook is selected. The repeated symbols at each repeated symbol are combined into one symbol to form a new symbol sequence, and the data length in the new symbol sequence is equal to the data length after the enhanced physical downlink control channel coding and rate matching;

The output unit 54 is configured to output a new symbol sequence to the de-rate matching and decoding module for decoding.

The receiver provided by the embodiment of the present invention can solve the control channel coding output length and the mapped control channel physical subunit can be accommodated without knowing the data length that the finally mapped control channel physical subunit can be placed. The problem of data length mismatch.

Referring to FIG. 6, the adjustment unit 53 includes:

The 0 sub-unit 53 1 is configured to: after the enhanced physical downlink control channel demodulation, the data length after the enhanced physical downlink control channel demodulation is smaller than the enhanced physical downlink control channel coding and the rate-matched data length of the current blind detection, after the enhanced physical downlink control channel is demodulated In the sequence of symbols, the third number of punctured symbols is uniformly extracted, and the third number is the enhanced physical downlink control channel coding of the current blind detection and the symbol number of the symbol sequence of the data matching after the rate matching is subtracted and enhanced. The number of symbols in the symbol sequence after demodulation of the physical downlink control channel; and/or,

The merging sub-unit 532 is configured to: after the enhanced physical downlink control channel demodulation data length is greater than the current blind detection enhanced physical downlink control channel coding and the rate matching data length, the enhanced physical downlink control channel demodulated symbol Uniformly picking out the symbols of the fourth number of symbol repetitions in the sequence to perform weighted averaging into one symbol, and the fourth number is the number of symbols in the symbol sequence after demodulation of the enhanced physical downlink control channel minus the enhanced physics of the current blind detection The number of symbols of the symbol sequence of the downlink control channel coding and the rate matched data mapping.

Embodiments of the present invention provide a network system comprising any of the above transmitters and any of the above receivers.

Here, the transmitter may be a base station; the receiver may be a mobile terminal. The network system provided by the embodiment of the present invention can solve the control channel coding and rate matching output length and the mapped control channel physical subunit caused by not knowing the data length that the finally mapped control channel physical subunit can be placed. The problem of data length mismatch can be accommodated.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Claim

A control channel resource mapping method, comprising:

Determining the resource unit RE of the physical subunit of the control channel according to the number of cell-specific reference signal CRS ports of the current subframe, the number of symbols occupied by the control channel, the number of channel state information reference signals CSI-RS ports, and the number of demodulation reference signals DM S ports The reference value is determined according to the modulation mode of the enhanced physical downlink control channel, the aggregation level, and the RE number reference value of the physical subunit of the control channel, and the data length after the enhanced physical downlink control channel coding and rate matching is determined, and the physical downlink is enhanced. The control channel coding and the rate matched data are mapped into a symbol sequence, wherein the data length is equal to a product of the number of symbols of the symbol sequence and the number of bits corresponding to each symbol;

And selecting, according to the total number of real REs of the physical subunit of the control channel to which the enhanced physical downlink control channel is to be mapped, and the data length of the enhanced physical downlink control channel coding and rate matching, selecting a certain number in the symbol sequence The number of symbols is subjected to symbol repetition or symbol puncturing to form a new symbol sequence, and the number of symbols in the new symbol sequence is equal to the total number of total REs of the control channel physical subunit;

Mapping the new sequence of symbols onto a corresponding control channel physical subunit.

2. The method according to claim 1, wherein the actual number of REs according to the physical subunit of the control channel to which the enhanced physical downlink control channel is to be mapped and the enhanced physical downlink control channel coding And the rate-matched data length picks a certain number of symbols in the symbol sequence for symbol repetition or symbol puncturing, including:

When the number of symbols in the symbol sequence is smaller than the actual number of REs of the control channel physical subunit to which the enhanced physical downlink control channel is to be mapped, the first number of symbols are uniformly picked out in the symbol sequence. Repetitively, forming a new sequence of symbols, wherein the first number is the actual number of REs of the control channel physical subunit to which the enhanced physical downlink control channel is to be mapped minus the number of symbols in the sequence of symbols; or ,

When the number of symbols in the symbol sequence is greater than the actual number of REs of the control channel physical subunit to which the enhanced physical downlink control channel is to be mapped, from the symbol sequence Uniformly picking out a second number of symbols in the column for symbol puncturing, forming a new sequence of symbols, wherein the second number is the number of symbols in the sequence of symbols minus the mapping to which the enhanced physical downlink control channel is to be mapped Controls the total number of REs in the physical subunit of the channel.

The method according to claim 1 or 2, wherein the determining the enhanced physical downlink control according to the modulation mode of the enhanced physical downlink control channel, the aggregation level, and the RE number reference value of the physical subunit of the control channel The data length after channel coding and rate matching includes:

The data length is obtained by the following formula:

E = M * A * ref _ Nf _E ^CEIeREG

Wherein, the data length, ^£/ is a reference value of the number of REs of the physical subunit of the control channel, A is an aggregation level, and M is a number of bits corresponding to each RE,

When the modulation method is QPSK modulation, Μ=2

When the modulation method is 16 quadrature amplitude QAM modulation, Μ=4

When the modulation method is 64QAM modulation, M=6.

The method according to any one of claims 1 to 3, wherein the control channel physical subunit comprises: an enhanced control channel unit eCCE, an enhanced resource unit group eREG.

A control channel resource mapping method, comprising:

Determining the number of resource units RE of the physical subunit of the control channel according to the number of cell-specific reference signal CRS ports of the current subframe, the number of symbols occupied by the control channel, the number of channel state information reference signals CSI-RS ports, and the number of demodulation reference signals DMRS ports a reference value; according to the modulation mode of the enhanced physical downlink control channel of the current blind detection, the aggregation level, and the RE number reference value of the physical subunit of the control channel, the data length of the physical downlink control channel coding and the rate matching is enhanced, wherein The data length is the number of symbols of the symbol sequence of the enhanced physical downlink control channel coding and the rate matched data mapping multiplied by the number of bits corresponding to each symbol in the symbol sequence;

And the data length after the demodulation of the enhanced physical downlink control channel and the data length of the enhanced physical downlink control channel coding and rate matching of the current blind detection, in the symbol sequence after demodulation of the enhanced physical downlink control channel Pick the punch symbol Inserting a 0 or a uniform hook selects the repeated symbols at each repeated symbol and merges them into one symbol to form a new symbol sequence. The data length in the new symbol sequence is equal to the enhanced physical downlink control channel coding and rate matching. Data length

The new symbol sequence is output to a de-rate matching and decoding module for decoding.

The method according to claim 5, wherein the data length demodulated according to the enhanced physical downlink control channel and the enhanced physical downlink control channel coding and rate matching data currently being blindly detected Length, in the symbol sequence after demodulation of the enhanced physical downlink control channel, uniformly selects a punctured symbol to insert 0 or uniformly selects a repeated symbol at each repeated symbol to be combined into one symbol to form a new symbol sequence including :

After the data length of the enhanced physical downlink control channel demodulation is smaller than the data length of the enhanced physical downlink control channel coding and rate matching of the current blind detection, after the enhanced physical downlink control channel is demodulated And inserting 0 in the symbol sequence uniformly picking out a third number of puncturing symbols, wherein the third number is the symbol sequence of the enhanced physical downlink control channel coding and rate matching data mapping of the current blind detection. The number of symbols minus the number of symbols in the symbol sequence after demodulation of the enhanced physical downlink control channel;

Or,

After the data length of the enhanced physical downlink control channel demodulation is greater than the data length of the enhanced physical downlink control channel coding and rate matching of the current blind detection, after the enhanced physical downlink control channel is demodulated Uniformly picking out the symbols of the fourth number of symbol repetitions in the symbol sequence to perform weighted averaging into one symbol, the fourth number being the number of symbols in the symbol sequence after demodulation of the enhanced physical downlink control channel minus The number of symbols of the symbol sequence of the enhanced physical downlink control channel coding and the rate matched data mapping of the current blind detection.

The method according to claim 5 or 6, wherein the determining, according to the modulation mode of the enhanced physical downlink control channel, the convergence level, and the RE number reference value of the physical subunit of the control channel, are determined according to the current blind detection. The data length after enhancing the physical downlink control channel coding and rate matching includes: The data length is obtained by the following formula:

E = M * A * ref _Nf _E ^{CE REG}

Where, £ is the data length, ^re f— ^N _RE is the reference number of the number of _REs of the physical subunit of the control channel, A is the convergence level, and M is the number of bits corresponding to each RE.

When the modulation method is QPSK modulation, Μ=2

When the modulation method is 16 quadrature amplitude QAM modulation, Μ=4

When the modulation method is 64QAM modulation, M=6.

The method according to any one of claims 5 to 7, wherein the control channel physical subunit comprises: an enhanced control channel unit eCCE, an enhanced resource unit group eREG.

9. A transmitter, comprising:

a resource estimating unit, configured to determine, according to a cell-specific reference signal CRS port number of the current subframe, a number of symbols occupied by the control channel, a channel state information reference signal CSI-RS port number, and a demodulation reference signal DMRS port number, to determine a control channel physical subunit Resource unit RE number reference value;

And an adjusting unit, configured to: according to the total number of real REs of the control channel physical subunit to which the enhanced physical downlink control channel is to be mapped, and the enhanced physical downlink control channel coding and rate matching data length in the symbol sequence Selecting a certain number of symbols for symbol repetition or symbol puncturing to form a new symbol sequence, the number of symbols in the new symbol sequence being equal to the total number of total REs of the control channel physical subunit; mapping unit, And mapping the new symbol sequence to a corresponding control channel physical subunit.

The transmitter according to claim 9, wherein the adjustment unit comprises: And a repeating subunit, configured to uniformly select a total number of REs in the symbol sequence when the number of symbols in the symbol sequence is smaller than a total number of REs of the control channel physical subunit to which the enhanced physical downlink control channel is to be mapped Performing symbol repetition on the first number of symbols to form a new symbol sequence, where the first number is the actual number of REs of the control channel physical subunit to which the enhanced physical downlink control channel is to be mapped, minus the symbol sequence The number of symbols in ;

and / or,

a puncturing subunit, configured to: when the number of symbols in the symbol sequence is greater than a total number of REs of the control channel physical subunit to which the enhanced physical downlink control channel is to be mapped, Performing a second number of symbols for symbol puncturing to form a new symbol sequence, wherein the second number is a number of symbols in the symbol sequence minus a control channel physical subunit to which the enhanced physical downlink control channel is to be mapped The total number of REs.

1 1. A receiver, comprising:

a resource estimating unit, configured to determine a control channel physical subunit according to a cell-specific reference signal CRS port number of the current subframe, a number of symbols occupied by the control channel, a channel state information reference signal CSI-RS port number, and a demodulation reference signal DMRS port number Resource unit RE number reference value;

a parameter estimation unit, configured to determine, according to a modulation mode, an aggregation level, and a RE number reference value of the physical subunit of the control channel of the current blind detection, an enhanced physical downlink control channel coding and a data length after the rate matching The data length is the number of symbols of the symbol sequence of the enhanced physical downlink control channel coding and the rate matched data mapping multiplied by the number of bits corresponding to each symbol in the symbol sequence; The data length after the demodulation of the physical downlink control channel is demodulated, and the data length of the enhanced physical downlink control channel coding and rate matching of the current blind detection is uniform in the symbol sequence after demodulation of the enhanced physical downlink control channel. Picking out the puncturing symbol at the 0 or the check mark, and selecting the repeated symbols at each repeated symbol to merge into one symbol to form a new symbol sequence. The data length in the new symbol sequence is equal to the enhanced physical downlink control channel. The length of the data after encoding and rate matching; And an output unit, configured to output the new symbol sequence to a de-rate matching and decoding module for decoding.

12. The receiver according to claim 1, wherein the adjustment unit comprises:

Inserting a sub-unit, the data length after the demodulation of the enhanced physical downlink control channel is smaller than the data length of the enhanced physical downlink control channel coding and rate matching of the current blind detection, in the enhanced physical The third sequence of the symbol sequence after demodulation of the downlink control channel is selected to be 0, wherein the third number is the enhanced physical downlink control channel coding and rate matching of the current blind detection. The number of symbols of the symbol sequence of the subsequent data mapping minus the number of symbols in the symbol sequence after demodulation of the enhanced physical downlink control channel;

and / or,

a merging sub-unit, configured to: when the data length after demodulation of the enhanced physical downlink control channel is greater than the data length of the enhanced physical downlink control channel coding and rate matching of the current blind detection, in the enhanced physical downlink The symbols in the symbol sequence after demodulation of the control channel are selected to pick out the symbols of the fourth number of symbol repetitions and are weighted and averaged into one symbol, and the fourth number is a symbol sequence demodulated by the enhanced physical downlink control channel. The number of symbols in the subtraction of the number of symbols of the symbol sequence of the enhanced physical downlink control channel coding and rate matching data mapping of the current blind detection.

A network system, comprising the transmitter of claim 9 or 10 and any of the receivers of claim 1 or 12.

14. The system of claim 13 wherein said transmitter is a base station;

The receiver can be a mobile terminal.