CN103312464B - Transmission method and device for physical hybrid automatic repeat request indicator channel - Google Patents
Transmission method and device for physical hybrid automatic repeat request indicator channel Download PDFInfo
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- CN103312464B CN103312464B CN201210063531.6A CN201210063531A CN103312464B CN 103312464 B CN103312464 B CN 103312464B CN 201210063531 A CN201210063531 A CN 201210063531A CN 103312464 B CN103312464 B CN 103312464B
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Abstract
The embodiment of the invention provides a transmission method, a base station and a user device for a PHICH. The method comprises the steps that PHICH feedback information and a PHICH reference signal are mapped to a PHICH resource group, wherein the PHICH reference signal is used by the user device to demodulate the PHICH feedback information; and the PHICH resource group is sent to the user device. According to the embodiment of the invention, the PHICH feedback information and the PHICH reference signal are simultaneously transmitted in the PHICH resource group, so that the transmission channels of the PHICH reference signal and the PHICH feedback information are matched; and the demodulation accuracy of the PHICH feedback information is improved.
Description
Technical field
The present embodiments relate to wireless communication field, and more particularly, to PHICH (Physical Hybrid
Automatic repeat request Indicator Channel, physical hybrid automatic repeat request indicator channel) transmission
Method, base station and user equipment.
Background technology
In the up-link of LTE-A (Long term evolution advanced, advanced Long Term Evolution) system, UE
(User Equipment, user equipment) passes through uplink data channels PUSCH (Physical Uplink Shared
Channel, Physical Uplink Shared Channel), send data to eNB (evolved NodeB, base station).Receiving UE transmissions
After data, eNB needs to be demodulated, and demodulation result is fed back to UE by the subframe after.If demodulation is correctly with regard to feeding back ACK
(Acknowledge confirms) signal, if demodulation mistake NACK (Non-Acknowledge, non-acknowledgement) signal is fed back.UE
If receiving ACK information, it is considered as sending data success, if receiving nack message, it is known that bust thiss, then typically can
Resend data.Feedback information passes through PHICH channels in downlink transmission to UE, in FDD (frequency division
Duplex, FDD) in system, if UE sends PUSCH in the n-th subframe to UE, feedback information can be logical in the n-th+4 subframe
Cross PHICH and be handed down to UE, n is positive integer.
Generally there are many UE, eNB to receive the PUSCH that many UE send in a sub- frame in one cell, this
Sample just has many corresponding ACK/NACK feedback informations (or being referred to as " PHICH feedback informations ") to be handed down in a sub- frame in
UE.Corresponding ACK/NACK feedback informations would take up certain running time-frequency resource.Illustrate below in current LTE system
PHICH transmission means.
In LTE system, running time-frequency resource is divided into cell one by one, and each cell is referred to as a RE (resource
Element, Resource Unit), each RE takes certain running time-frequency resource.
In descending sub frame, there are some RE for carrying PHICH.In LTE system, 12 RE for being used for transmitting PHICH can
To constitute a PHICH resource group, there can be multiple PHICH resource groups within a subframe.Different resource groups can be using not
Same RE.ENB can arrange the number of the PHICH resource group in the subframe in this cell.
Multiple ACK/NACK feedback informations can be transmitted in identical PHICH resource group, and these ACK/NACK are defined
One PHICH group (PHICH groups).For up to 8 ACK/NACK feedback informations can be accommodated in one PHICH group
Simultaneous transmission, although this 8 PHICH are transmitted in identical RE, due to having used different orthogonal codes
(Orthogonal code), so UE still can one by one solve it.
Modulation system in each PHICH group is as described below.ACK/NACK feedbacks itself only have 1 bit (bit)
Quantity of information (0 represents NACK, and 1 represents ACK), first repeats the bit 3 times, so as to become 3 bits, then carries out BPSK
(Binary Phase Shift Keying, binary phase shift keying) is modulated.After modulation, each symbol is multiplied by a length
For 4 orthogonal code.Different feedback signalings is multiplied by different orthogonal codes.Be up to 8 orthogonal codes in one PHICH group,
So a PHICH group accommodates up to 8 ACK/NACK feedbacks.After orthogonal code is multiplied, each ACK/NACK feedback
All become the sequence that length is 12, and be multiplied by after a scrambler sequence by these its superimpositions together, it is possible to
It is mapped in PHICH resource group.Because PHICH resource group takes 12 RE, then each symbol of sequence is placed on one
On RE.ENB goes out the data is activation after modulation.
In FDD system, after UE has sent data by PUSCH in the n-th subframe to eNB, it is necessary to ensuing
Go to demodulate PHICH to obtain ACK/NACK feedback informations from the signal for issuing in n-th+4 subframe.As described above, in this height
Frame in, has many PHICH information and issues, and what UE had to judge to transmit in which PHICH resource is for the ACK/ of oneself
NACK feeds back.So UE is it is to be understood which PHICH group the PHICH for being directed to oneself belongs to and in this PHICH
Which orthogonal code used in group.
After knowing the two information, UE can demodulate the ACK/NACK feedback informations for oneself.
In order to calculate the orthogonal code sequence number in PHICH information place the PHICH group and group for oneself, UE is only
Need to know following two information：The initial frequency domain position of PUSCH transmission, and DMRS (DeModulation in PUSCH
Reference Signal, demodulated reference signal) CS (Cyclic Shift, cyclic shift) that adopted.
Then according to table below can just calculate PHICH group and orthogonal code sequence number up to formula：
Wherein,For the sequence number of PHICH group,For orthogonal code sequence number,For PUSCH transmission
Initial frequency domain position, nDMRSThe CS adopted by the DMRS in PUSCH,For the cell currently can accommodate it is maximum
PHICH group quantity, IPHICHFor a configurable parameter, in TDD (time division duplex, time division duplex) system
In, if uplink-downlink configuration (UL/DLconfiguration) is 0, then in the 4th or 9 subframes, IPHICH1 is set to, remaining
In the case of, IPHICHIt is set to 0,For the length of aforementioned orthogonal code, mod is modulo operation.
The cyclic shift that the initial frequency domain position of PUSCH transmission is used with DMRS, when PUSCH is sent, UE is
Know, therefore, UE can calculate accordingly be directed to oneself PHICH feedback informations be located PHICH group with just
Hand over code sequence number.After these information are calculated, UE can find the PHICH feedback informations of oneself.
When carrying out the demodulation of PHICH feedback informations, UE needs to carry out channel estimation first.In current LTE system, some
RE can be used for transmitting CRS (cell-specific reference signal, cell specific reference signal).CRS is some receipts
Send out the signal that both sides know, its RE different from PHICH occupancy.UE can simultaneously receive PHICH feedback informations and pass with CRS
It is defeated.According to CRS, UE can carry out channel estimation, and PHICH feedback information demodulation is carried out with channel estimation value.
In legacy communications system framework, in a cell (cell), only one of which base station (referred to as macro base station), in the cell
The PUSCH of all UE be all sent to macro base station, and macro base station feeds back the ACK/NACK information of all UE also by PHICH.
Above-mentioned PHICH designs can preferably solve ACK/NACK feedback problems in traditional communication network.
But at present new application scenarios are occurred in that in radio communication, under these new scenes, original PHICH design meetings
There is capacity problem.Under new architecture, there may be a macro base station and multiple micro-base stations, these micro-base stations in same cell
It is connected with macro base station by optical fiber.Micro-base station can be arranged on some hot zones, strengthen local signal intensity.This base slightly
Stand with macro base station in identical cell, there is identical cell ID (cell-id).
As described above, the demodulation of PHICH feedback informations needs to carry out channel estimation by means of CRS, and CRS is on which RE
It is transmitted, and sending what signal is determined by cell-id.Because macro base station and micro-base station use identical cell-
Id, then several websites can send identical CRS signal in identical RE, the CRS signals that such UE is received are actually
The superposition of the CRS that several base stations send, if carrying out channel estimation using the CRS for receiving, the channel reality for estimating
On be channel sum of several base stations to this UE.So demodulate PHICH feedback informations and have very big error, because estimating
The channel of channel and the actual experience of PHICH differ, the accuracy of impact demodulation result.
The content of the invention
The embodiment of the present invention provides a kind of PHICH transmission methods, base station and user equipment, it is possible to increase PHICH feedback letters
The demodulation accuracy of breath.
On the one hand, there is provided a kind of transmission method of PHICH, including：By PHICH feedback informations and PHICH reference signals
It is mapped in PHICH resource group, PHICH reference signals are used for user equipment and demodulate PHICH feedback informations；Send to user equipment
PHICH resource group.
On the other hand, there is provided a kind of transmission method of PHICH, including：Receive the PHICH resource group that base station sends, institute
State and PHICH feedback informations and PHICH reference signals are have mapped in PHICH resource group；Using the PHICH demodulation reference signals institute
State PHICH feedback informations.
On the other hand, there is provided a kind of base station, including：Map unit, for physical mixed HARQ to be indicated
Channel PHICH feedback informations and PHICH reference signals are mapped in PHICH resource group, and the PHICH reference signals are used for user
Equipment demodulates the PHICH feedback informations；Transmitting element, for sending the map unit mapping to the user equipment
PHICH resource group.
On the other hand, there is provided a kind of user equipment, including：Receiving unit, for receiving the physical mixed of base station transmission
HARQ indicates channel PHICH resource group, and PHICH feedback informations and PHICH ginsengs are have mapped in the PHICH resource group
Examine signal；Demodulating unit, for using PHICH feedback informations described in the PHICH demodulation reference signals.
The embodiment of the present invention simultaneous transmission PHICH feedback information and PHICH reference signals in PHICH resource group, so
PHICH reference signals can be matched with the transmission channel of PHICH feedback informations, and the demodulation that improve PHICH feedback informations is accurate
Property.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be in embodiment or description of the prior art
The required accompanying drawing for using is briefly described, it should be apparent that, drawings in the following description are only some realities of the present invention
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can be with according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the signal scene graph of the network system that can implement the embodiment of the present invention..
Fig. 2 is the flow chart of the transmission method of the PHICH of one embodiment of the invention.
Fig. 3 is the flow chart of the transmission method of the PHICH of another embodiment of the present invention.
Fig. 4 is the schematic diagram of an application scenarios of the embodiment of the present invention.
Fig. 5 is the schematic diagram of the mode of the mapping PHICH resource group of one embodiment of the invention.
Fig. 6 is the schematic diagram of the mode of the mapping PHICH resource group of another embodiment of the present invention.
Fig. 7 is the mapping of one embodiment of the invention and sends the schematic diagram of the mode of PHICH resource group.
Fig. 8 is the mapping of another embodiment of the present invention and sends the schematic diagram of the mode of PHICH resource group.
Fig. 9 is the block diagram of the base station of one embodiment of the invention.
Figure 10 is the block diagram of the base station of another embodiment of the present invention.
Figure 11 is the block diagram of the user equipment of one embodiment of the invention.
Figure 12 is the block diagram of the user equipment of another embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is a part of embodiment of the invention, rather than the embodiment of whole.Based on this
Embodiment in bright, the every other enforcement that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
Technical scheme, can apply to various communication systems, for example：Global system for mobile communications (GSM,
Global System of Mobile communication), CDMA (CDMA, Code Division Multiple
Access) system, WCDMA (WCDMA, Wideband Code Division Multiple Access
Wireless), GPRS (general packet radio service) (GPRS, General Packet Radio Service), Long Term Evolution (LTE,
Long Term Evolution) etc..
User equipment (UE, User Equipment), also referred to as mobile terminal (Mobile Terminal), movement
User equipment etc., can be with Jing wireless access networks (for example, RAN, Radio Access Network) and one or more core nets
Communicated, user equipment can be mobile terminal, such as mobile phone (or be referred to as " honeycomb " phone) and with mobile terminal
Computer, for example, it may be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, they with
Wireless access network exchanges language and/or data.
Base station, can be base station (BTS, Base Transceiver Station) in GSM or CDMA, or
Base station (NodeB) in WCDMA, can also be the evolved base station (eNB or e-NodeB, evolutional Node in LTE
B), the present invention is not limited, but for convenience of description, following embodiments are illustrated by taking Node B as an example.
Fig. 1 is the signal scene graph of the network system that can implement the embodiment of the present invention.It should be noted that the network system of Fig. 1 is only
Merely to a kind of scene of the implemented present invention for more clearly describing the embodiment of the present invention and being given, and this have to be limited
The range of application of bright embodiment.For example, a macro base station 101 and two micro-base stations 102 and 103 are depicted in Fig. 1, but this
The base station of more or less number can be included in applicable other network systems of inventive embodiments.
Macro base station 101 and two micro-base stations 102 and 103 belong to same cell 100, by modes such as optical fiber between them
Connection.Hereinafter, if without the need for making a distinction to macro base station and micro-base station, macro base station and micro-base station are referred to as into base station
101-103。
There are multiple UE 104-105 in the coverage of cell 100.Although in order to succinctly depict only two in Fig. 1
UE 104 and 105, but the UE of more or less number is may include in the applicable network system of the embodiment of the present invention.
UE 104 is traditional UE, and using CRS PHICH feedback informations are demodulated.UE 105 is that the UE of the embodiment of the present invention (strengthens
UE), PHICH feedback informations can be demodulated using PHICH reference signals (PHICH-RS).Alternatively, strengthening UE 105 can also
With the ability that PHICH feedback informations are demodulated using CRS.
Fig. 2 is the flow chart of the transmission method of the PHICH of one embodiment of the invention.The method of Fig. 2 (is for example schemed by base station
Base station 101-103 shown in 1) perform.
201, PHICH feedback informations and PHICH-RS are mapped in PHICH resource group, PHICH-RS is used for user equipment
Demodulation PHICH feedback informations.
PHICH feedback informations are also called ACK/NACK feedback informations.PHICH-RS is that receiving-transmitting sides (base station and UE) are all known
The reference signal in road.UE can carry out channel estimation so as to demodulate PHICH feedback informations by PHICH-RS.
Alternatively, as one embodiment, PHICH feedback informations and PHICH-RS are mapped to using different orthogonal codes
PHICH resource group, or, PHICH feedback informations and PHICH-RS are mapped to the different RE of PHICH resource group.Further below will knot
Close the example description mapping PHICH feedback informations of Fig. 5 and Fig. 6 and the nonrestrictive embodiment of PHICH-RS.
202, send PHICH resource group to user equipment.
The mode for sending PHICH resource group can refer to mode of the prior art, therefore repeat no more.
Alternatively, as another embodiment, if transmitter has two antenna ports, can be by the transmission of multiple antennas
To obtain more preferable receptivity.Now, using two orthogonal resources, a PHICH is sent on two antenna ports anti-
Feedforward information.The embodiment of multiple antennas transmission will be described more fully with reference to the example of Fig. 7 and Fig. 8 further below.
The embodiment of the present invention simultaneous transmission PHICH feedback information and PHICH-RS in PHICH resource group, such PHICH-
RS can be matched with the transmission channel of PHICH feedback informations, improve the demodulation accuracy of PHICH feedback informations.
In addition, each base station is during PHICH feedback informations and PHICH-RS are mapped in PHICH resource group,
Need to be multiplied by a scrambler sequence.Alternatively, as one embodiment, the scrambler sequence specific to base station can be used, for
PHICH feedback informations and PHICH-RS are scrambled.That is, each base station can use unique scrambler sequence, so can reduce
The impact of the interference between each base station.
Scrambler sequence can be generated according to the mark of base station.For example, can be generated according to the first mark specific to base station specific
Can send for indicating that first identifies to user equipment (UE 105 as shown in Figure 1) in the scrambler sequence of base station, and base station
Configured information.
Specifically, in the case where all base stations of cell use identical cell ID (cell-id), can be according to base
The cell ID cell-id and deviator offset specific to base station of place cell of standing, obtains the first mark point-id, for example
Point-id=cell-id+offset.Base station to the first configured information for identifying point-id that UE sends can be the deviator
offset.Cell-id can by other means notify that to UE such as UE obtains cell-id by blind Detecting.UE is according to deviator
Offset calculates corresponding first mark point-id, and obtains disturbing specific to the base station according to the first mark point-id
Code sequence, such that it is able to descramble to the PHICH of corresponding base station exactly, weakens the interference effect of other base stations.
So, each base station can individually feed back the PHICH information of oneself, and other base stations in cell not produced dry
Disturb, improve the PHICH capacity of system.
Fig. 3 is the flow chart of the transmission method of the PHICH of another embodiment of the present invention.The method of Fig. 3 is by user equipment (example
UE 105 as shown in Figure 1) perform, and it is corresponding with the method for Fig. 2, therefore appropriate omission is repeated with the embodiment of Fig. 2
Description.
301, receive base station send PHICH resource group, have mapped in PHICH resource group PHICH feedback informations and
PHICH-RS。
Alternatively, as one embodiment, PHICH feedback informations and PHICH-RS can use different orthogonal codes, or
PHICH feedback informations and PHICH-RS map to the different Resource Unit RE of PHICH resource group.Further below will be with reference to Fig. 5
With the nonrestrictive embodiment that the example of Fig. 6 describes mapping PHICH feedback informations and PHICH-RS.
The mode for receiving PHICH resource group can refer to mode of the prior art, therefore repeat no more.Alternatively, as
Another embodiment, if base station sends the more preferable receptivity of acquisition by multiple antennas, UE can receive base station and utilize two
The PHICH feedback information that individual orthogonal resource sends on two antenna ports.Further below by with reference to the example of Fig. 7 and Fig. 8
It is described more fully the embodiment of multiple antennas transmitting-receiving.
302, demodulate PHICH feedback informations using the PHICH-RS.
Alternatively, as one embodiment, the process of PHICH feedback informations is demodulated using CRS similar to UE, UE can be from
PHICH resource group obtains experiencing the PHICH-RS after transmission, and according to the PHICH-RS after experience transmission PHICH is obtained
The channel estimation value of resource group, using the channel estimation value demodulation PHICH feedback informations.
The embodiment of the present invention simultaneous transmission PHICH feedback information and PHICH reference signals in PHICH resource group, so
PHICH reference signals can be matched with the transmission channel of PHICH feedback informations, and the demodulation that improve PHICH feedback informations is accurate
Property.
Alternatively, as another embodiment, UE can also make before using PHICH-RS demodulation PHICH feedback informations
With the scrambler sequence specific to base station, the PHICH resource group to being received descrambles.That is, each base station can be using unique
Scrambler sequence, can so reduce the impact of the interference between each base station.
Alternatively, as another embodiment, UE can also receive the first instruction for identifying for indicating specific to base station
Information, according to the first mark the above-mentioned scrambler sequence specific to base station is generated.
Alternatively, as another embodiment, UE can be with according to the cell ID cell-id of base station place cell and specific
In deviator offset of base station, the first mark point-id, such as point-id=cell-id+offset are obtained.The cell
All base stations use identical cell ID cell-id, and the configured information of the first mark point-id can be the deviator
offset.Cell-id can be notified by other means to UE, such as by broadcast etc. in prior art.UE is according to deviator
Offset calculates corresponding first mark point-id, and obtains disturbing specific to the base station according to the first mark point-id
Code sequence, such that it is able to descramble to the PHICH of corresponding base station exactly, weakens the interference effect of other base stations.
So, each base station can individually feed back the PHICH information of oneself, improve the PHICH capacity of system.
Fig. 4 is the schematic diagram of an application scenarios of the embodiment of the present invention.The network architecture of Fig. 4 is identical with Fig. 1, and uses
Identical reference.
For traditional UE (UE 104 as shown in Figure 1), it is nonetheless possible to use CRS demodulates PHICH feedback informations.In traditional UE
104 and strengthen in the case that UE 105 carries out respectively the PHICH that PUSCH transmission and needing receives base station feedback, two kinds of UE need
It is handled differently.
All base station 101-103s of the traditional UE 104 from cell receive CRS C1 and PHICH resource group P1.PHICH is provided
Source group P1 is same as the prior art, only comprising PHICH feedback informations, therefore alternatively referred to as traditional PHICH resource group.Here, it is
PHICH is matched with channel estimation, direct method is, all base station 101-103 in cell are while to UE
104 feedback identicals P1.The P1 that so UE 104 is received really from three base station 101-103 signal superposition, and
UE104 is according to the superposition that the channel estimation value that CRS C1 are estimated is also three base stations, so demodulation PHICH will be using correct
Channel estimation value.Base station to tradition UE 104 when PUSCH transmission is specified, it should by setting original position and DMRS's
CS so that the PHICH of traditional UE 104 is located in traditional PHICH resource group.But in this fashion, it is meant that in identical
In resource (resource shared by P1), a PHICH can only be sent.So, because the PUSCH transmission in cell increases, need
The ACK/NACK of feedback increases, and the capacity of PHICH can Shortcomings.
Strengthen UE 104 and receive PHICH resource group P2 from base station 101, PHICH resource group P3 is received from base station 102, from base
Stand 103 receive PHICH resource groups P4.PHICH resource group P2-P4 is to be mapped according to the method for Fig. 1 and sent, comprising PHICH-
RS and PHICH feedback informations, therefore alternatively referred to as strengthen PHICH resource group.PHICH resource group P2-P4 each other can be with difference.This
In it should be noted that although all base station 101-103 for being depicted as in cell send enhancing PHICH resource group in Fig. 4, this
Bright embodiment not limited to this, UE is possible to the portion of base stations only from cell and receives enhancing PHICH resource group.
Specifically, PHICH resource group P1-P4 can be made up of 12 RE, for carrying a PHICH group.Per 4 RE
One RE group of composition.What is transmitted in traditional PHICH resource group P1 is ACK/NACK feedback informations (PHICH feedback letters
Breath).Strengthening not only transmit ACK/NACK feedback informations, and simultaneous transmission reference signal PHICH- in PHICH resource group P2-P4
RS。
Base station can notify that the UE 105 of this cell which PHICH group adopts PHICH-RS, such as by explicit or hidden
The modes such as the high-level signaling of formula.Or, base station and UE 105 can offered which PHICH group adopt PHICH-RS, or
Person base station and UE 105 can determine which PHICH group adopts PHICH-RS according to predetermined set.The embodiment of the present invention is to this
It is not restricted.
Strengthen UE 105 and CRS is no longer adopted when being demodulated, but adopt PHICH-RS.Strengthen UE 105 in descrambling code
Afterwards, need to calculate PHICH group and the orthogonal code sequence number that its PHICH is located.Strengthen UE 105 and calculate oneself place
During PHICH group, traditional PHICHgroup will be first excluded.Strengthen the starting of the PUSCH that UE 105 is transmitted according to oneself
Frequency domain position comes to select PHICH group from enhancing PHICH group with the CS of DMRS.
The embodiment of the present invention simultaneous transmission PHICH feedback information and PHICH reference signals in PHICH resource group, so
PHICH reference signals can be matched with the transmission channel of PHICH feedback informations, and the demodulation that improve PHICH feedback informations is accurate
Property.
Fig. 5 is the schematic diagram of the mode of the mapping PHICH resource group of one embodiment of the invention.Fig. 5 depicts base station
Operation, wherein PHICH feedback informations and PHICH-RS are mapped to PHICH resource group using different orthogonal codes.UE is performed and reflected
The corresponding inverse operation of the operation of PHICH resource group is penetrated, for sake of simplicity, without the operation side for describing receiving terminal UE in the accompanying drawings
Formula.The operation of base station and UE is each fallen within the range of the embodiment of the present invention.In addition, PHICH feedback informations and PHICH-RS in Fig. 5
Number be merely exemplary, rather than restriction to the embodiment of the present invention.
As shown in figure 5, PHICH feedback informations (such as PHICH0 and PHICH1, most 7 PHICH feedback informations) itself
The quantity of information (such as 0 represents NACK, and 1 represents ACK) of only 1 bit.PHICH feedback bits are repeated 3 times first, so as to become
3 bits, then carry out BPSK modulation.After modulation, each symbol is multiplied by orthogonal code that length is 4 (such as orthogonal code 0 and just
Hand over code 1 etc.).Different feedback informations is multiplied by different orthogonal codes.
PHICH-RS is also carried out BPSK modulation, is then multiplied by corresponding orthogonal code (such as orthogonal code 7).In the embodiment of Fig. 5
In, PHICH-RS can include 3 bits or less quantity of information.The orthogonal code that feedback information and PHICH-RS are used also not phase
Together.
Be up to 8 orthogonal codes in one PHICH group, so the PHICH- that a PHICH group is accommodated up to
The sum of RS and PHICH feedback informations is 8.After orthogonal code is multiplied, PHICH-RS and PHICH feedback informations all become one
Individual length is 12 sequence, and is multiplied by after a scrambler sequence, it is possible to be mapped to by these its superimpositions together
In PHICH resource group.Because PHICH resource group takes 12 RE, then each symbol of sequence is placed on a RE.Base
Stand and the data is activation after modulation is gone out.
As shown in figure 5,12 RE point is 3 RE groups.The method of salary distribution of RE can refer to prior art, therefore repeat no more.
According to the mode of Fig. 5, UE is after the PHICH group for calculating oneself PHICH feedback information place, in addition it is also necessary to used by calculating
Orthogonal code.If PHICH-RS occupies one of orthogonal code (orthogonal code 7 as shown in Figure 5), base station needs to notify
UE orthogonal codes 7 are taken by PHICH-RS, then when UE calculates orthogonal code 0-6 used by the PHICH feedback informations of oneself, need to exclude
This orthogonal code 7.Or, base station and UE can in advance consult or preset the orthogonal code shared by PHICH-RS, and need not
Notify.The invention is not limited in this regard.
The embodiment of the present invention simultaneous transmission PHICH feedback information and PHICH reference signals in PHICH resource group, so
PHICH reference signals can be matched with the transmission channel of PHICH feedback informations, and the demodulation that improve PHICH feedback informations is accurate
Property.
Fig. 6 is the schematic diagram of the mode of the mapping PHICH resource group of another embodiment of the present invention.Fig. 6 depicts base station
Operation, wherein PHICH feedback informations and PHICH-RS are mapped to the different RE of PHICH resource group.UE is performed and mapping PHICH moneys
The corresponding inverse operation of operation of source group, for sake of simplicity, the mode of operation without description receiving terminal UE in the accompanying drawings.Base station and UE
Operation each fall within the range of the embodiment of the present invention.In addition, the number of PHICH feedback informations and PHICH-RS is only in Fig. 6
It is exemplary, rather than the restriction to the embodiment of the present invention.
As shown in fig. 6, PHICH feedback informations (such as PHICH0 to PHICH5, most 6 PHICH feedback informations) itself
The quantity of information (such as 0 represents NACK, and 1 represents ACK) of only 1 bit.PHICH feedback bits are repeated 3 times first, so as to become
3 bits, then carry out BPSK modulation.After modulation, orthogonal code that length is 3 is multiplied by per bit (if orthogonal code 0 is to orthogonal
Code 5 etc.).Different feedback informations is multiplied by different orthogonal codes.Here, the length of orthogonal code with shorter, but can accordingly subtract
The number of the orthogonal code included in a few PHICH group.
After orthogonal code is multiplied, PHICH feedback informations all become the sequence that length is 9, by these its superimpositions
Together, and it is multiplied by after a scrambler sequence, it is possible to be mapped on the part RE of PHICH resource group, nothing as shown in Figure 6
The RE of shade.
PHICH-RS different from PHICH feedback informations occupancy RE.For example, PHICH-RS takes the band shade shown in Fig. 6
RE, in each RE group at least one RE be used for map PHICH-RS.Here, the embodiment of Fig. 6 is not limited to PHICH-RS
Map directly on corresponding RE.For example, first PHICH-RS can be multiplied by into scrambler sequence, then the result of scrambling is mapped to accordingly
On RE, to reduce the impact of interference.
Base station is by the data is activation after modulation to UE.UE will exclude PHICH- when the PHICH feedback informations of oneself are calculated
RE shared by RS.In the embodiment in fig 6, PHICH-RS can include the length of most 3 symbols.Shared by PHICH-RS
The positional information of RE can be notified to UE by base station, or can be that base station is consulted in advance or set in advance, and the present invention is to this
It is not restricted.
The embodiment of the present invention simultaneous transmission PHICH feedback information and PHICH reference signals in PHICH resource group, so
PHICH reference signals can be matched with the transmission channel of PHICH feedback informations, and the demodulation that improve PHICH feedback informations is accurate
Property.
Fig. 7 is the mapping of one embodiment of the invention and sends the schematic diagram of the mode of PHICH resource group.Fig. 7 is depicted
The operation of base station, wherein base station for same UE PHICH feedback informations using two orthogonal resources on two antenna ports
It is sent to UE.UE performs the inverse operation corresponding with the operation of mapping PHICH resource group, and the two signals are demodulated respectively, so as to
Obtain more preferable receptivity.For sake of simplicity, without the mode of operation for describing receiving terminal UE in the accompanying drawings.Base station and the operation of UE
Each fall within the range of the embodiment of the present invention.In addition, the number of PHICH feedback informations and PHICH-RS is only example in Fig. 7
Property, rather than the restriction to the embodiment of the present invention.
Specifically, as shown in fig. 7, base station by the orthogonal code division in a PHICH group into two parts, a part of (example
If orthogonal code 0 is to orthogonal code 3) send on antenna port 0, another part (for example orthogonal code 4 is to orthogonal code 7) is in antenna port
Send on 1.An orthogonal code (orthogonal code 3 and orthogonal code 7) is now needed in each section for sending out PHICH-RS.Fig. 7's
Other operations are not repeated description similar to Fig. 5.In addition, the dividing mode of orthogonal code is merely exemplary in Fig. 7,
Rather than the restriction to the embodiment of the present invention.
When sending PHICH feedback informations for a UE, same feedback is each in two-part orthogonal code to choose one,
Then sent respectively by two antenna ports.For example, as shown in fig. 7, PHICH feedback informations PHICH0 selects orthogonal code
0 and orthogonal code 4, PHICH feedback informations PHICH1 select orthogonal code 1 and orthogonal code 5.PHICH-RS1 selects orthogonal code 3 and passes through
Antenna port 0 sends.PHICH-RS1 is selected orthogonal code 7 and is sent by antenna port 1.
When UE is demodulated, first two antenna ports 0 and 1 are estimated respectively by PHICH-RS1 and PHICH-RS2 and arrive UE's
Channel.Then UE calculates the orthogonal code of the PHICH feedback informations for oneself (still by the original position of PUSCH with DMRS's
CS).UE demodulates respectively PHICH feedback informations according to channel estimation value, and by merging the more preferable quality of reception is obtained.
Fig. 8 is the mapping of another embodiment of the present invention and sends the schematic diagram of the mode of PHICH resource group.Fig. 8 is depicted
The operation of base station, wherein base station are divided to two parts to send for the PHICH feedback informations of same UE, two parts of PHICH feedback informations difference
It is transmitted by different antenna ports using different PHICH group, and two PHICH group.UE is performed and reflected
The corresponding inverse operation of the operation of PHICH resource group is penetrated, the two signals is demodulated respectively, so as to obtain more preferable receptivity.
For sake of simplicity, without the mode of operation for describing receiving terminal UE in the accompanying drawings.The operation of base station and UE each falls within the embodiment of the present invention
In the range of.In addition, the number of PHICH feedback informations and PHICH-RS is merely exemplary in Fig. 8, rather than to of the invention real
Apply the restriction of example.
Specifically, as shown in figure 8, the PHICH feedback information PHICH0 of UE are divided to two parts to send, two parts of PHICH feedback informations
Difference PHICH group are used respectively.The two PHICH group are transmitted by different antenna ports.Each PHICH
PHICH-RS reference signals are all included in group.
When UE is demodulated, first two antenna ports are estimated respectively to the channel of UE by PHICH-RS, then calculated
PHICH group and orthogonal code (still by the original position and the CS of DMRS of PUSCH) for the PHICH feedback informations of oneself,
Then PHICH feedback informations are demodulated respectively, and by merging the more preferable quality of reception is obtained.
The embodiment of the present invention simultaneous transmission PHICH feedback information and PHICH reference signals in PHICH resource group, so
PHICH reference signals can be matched with the transmission channel of PHICH feedback informations, and the demodulation that improve PHICH feedback informations is accurate
Property.In addition, the embodiment of Fig. 7 and Fig. 8 is obtained in that more preferable receptivity.
Fig. 9 is the block diagram of the base station of one embodiment of the invention.The base station 90 of Fig. 9 includes map unit 91 and transmitting element
92。
Map unit 91 is mapped to PHICH feedback informations and PHICH-RS in PHICH resource group, and the PHICH-RS is used for
User equipment demodulates PHICH feedback informations.Transmitting element 92 sends the PHICH resource of the mapping of map unit 91 to user equipment
Group.
The embodiment of the present invention simultaneous transmission PHICH feedback information and PHICH-RS in PHICH resource group, such PHICH-
RS can be matched with the transmission channel of PHICH feedback informations, improve the demodulation accuracy of PHICH feedback informations.
One example of base station 90 is the base station 101-103 in Fig. 1, is capable of achieving to be related to base station in the embodiment of Fig. 1 to Fig. 8
Operation, therefore for avoid repeat, be not described in detail.Map unit 91 can be processor, and transmitting element 92 can be connect
Mouthful.
Alternatively, as one embodiment, map unit 91 can use PHICH feedback informations and PHICH-RS different
Orthogonal code is mapped to PHICH resource group, such as shown in the embodiment of Fig. 5.Or, map unit 91 can be by PHICH feedback informations
With the different RE that PHICH-RS is mapped to PHICH resource group, such as shown in the embodiment of Fig. 6.
Alternatively, as another embodiment, transmitting element 92 is sent out using two orthogonal resources on two antenna ports
A PHICH feedback information is sent, such as shown in the embodiment of Fig. 7 and Fig. 8.PHICH receptivities can so be improved.
Figure 10 is the block diagram of the base station of another embodiment of the present invention.The base station 95 of Figure 10 is one of the base station 90 of Fig. 9 non-
Restricted embodiment, including all parts of base station 90, therefore the corresponding description of appropriate omission.Additionally, base station 95 also includes
Signal generating unit 93.Signal generating unit 93 can be processor.
The map unit 91 of base station 95 can use the scrambler sequence specific to base station, to PHICH feedback informations and PHICH-
RS is scrambled.
Alternatively, as one embodiment, signal generating unit 93 can according to specific to base station first mark generate specific to
The scrambler sequence of base station.Now transmitting element 92 can with to user equipment send for indicate first mark configured information.
Alternatively, as another embodiment, signal generating unit 93 can be with according to the cell ID of the place cell of base station 95
Cell-id and deviator offset specific to base station 95, obtain the first mark point-id, such as point-id=cell-id+
All base stations of offset, the wherein cell use identical cell ID cell-id.In the case, transmitting element 92
The configured information of the first mark sent can be above-mentioned deviator offset.
So, each base station can individually feed back the PHICH information of oneself, and other base stations in cell not produced dry
Disturb, improve the PHICH capacity of system.
Figure 11 is the block diagram of the user equipment of one embodiment of the invention.The user equipment 110 of Figure 11 includes receiving unit
111 and demodulating unit 112.
Receiving unit 111 receives the PHICH resource group that base station sends, and in the PHICH resource group PHICH feedback letters are have mapped
Breath and PHICH-RS.Demodulating unit 112 demodulates PHICH feedback informations using PHICH-RS.
The embodiment of the present invention simultaneous transmission PHICH feedback information and PHICH reference signals in PHICH resource group, so
PHICH reference signals can be matched with the transmission channel of PHICH feedback informations, and the demodulation that improve PHICH feedback informations is accurate
Property.
One example of user equipment 110 is the enhancing UE 105 in Fig. 1, is capable of achieving to be related in the embodiment of Fig. 1 to Fig. 8
The operation of UE, therefore to avoid repeating, be not described in detail.Receiving unit 111 can be interface, and demodulating unit 112 can be
Processor.
Alternatively, as one embodiment, demodulating unit 112 can obtain experiencing after transmission from PHICH resource group
PHICH-RS, obtains the channel estimation value of PHICH resource group, using channel estimation according to the PHICH-RS after experience transmission
Value demodulation PHICH feedback informations, wherein PHICH feedback informations and PHICH-RS use different orthogonal codes, the enforcement of such as Fig. 5
Shown in example；Or PHICH feedback informations and PHICH-RS are mapped to the different RE of PHICH resource group, such as embodiment of Fig. 6
It is shown.
Alternatively, as another embodiment, receiving unit 111 can receive base station using two orthogonal resources in two antennas
The PHICH feedback information sent on port, such as shown in the embodiment of Fig. 7 and Fig. 8.
Figure 12 is the block diagram of the user equipment of another embodiment of the present invention.The user equipment 120 of Figure 12 is the user of Figure 11
One non-limiting embodiment of equipment 110, including all parts of user equipment 110, therefore suitably omission is retouched accordingly
State.Additionally, user equipment 120 also includes Descrambling unit 121.Descrambling unit 121 can be processor.
Descrambling unit 121 is entered using the scrambler sequence specific to base station to the PHICH resource group that receiving unit 111 is received
Row descrambling.
Alternatively, as one embodiment, receiving unit 111 can also be received for indicating specific to the first of base station to mark
The configured information of knowledge.Descrambling unit 121 can with according to first mark generate specific to base station scrambler sequence.
Alternatively, as another embodiment, Descrambling unit 121 can be with according to the cell ID of base station place cell
Cell-id and deviator offset specific to base station, obtain the first mark point-id, wherein all base stations of the cell make
Use identical cell ID.In the case, the configured information of the first mark that receiving unit 111 is received can be above-mentioned deviator
offset.So as to UE can descramble exactly to the PHICH of corresponding base station, weaken the interference effect of other base stations.
So, each base station can individually feed back the PHICH information of oneself, improve the PHICH capacity of system.
Communication system according to embodiments of the present invention may include above-mentioned base station 90/95 or above-mentioned user equipment 110/120.
Those of ordinary skill in the art are it is to be appreciated that the list of each example with reference to the embodiments described herein description
Unit and algorithm steps, being capable of being implemented in combination in electronic hardware or computer software and electronic hardware.These functions are actually
Performed with hardware or software mode, depending on the application-specific and design constraint of technical scheme.Professional and technical personnel
Each specific application can be used different methods to realize described function, but this realization it is not considered that exceeding
The scope of the present invention.
Those skilled in the art can be understood that, for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, will not be described here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method, can be with
Realize by another way.For example, device embodiment described above is only schematic, for example, the unit
Divide, only a kind of division of logic function can have other dividing mode, such as multiple units or component when actually realizing
Can with reference to or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, it is shown or
The coupling each other for discussing or direct-coupling or communication connection can be the indirect couplings by some interfaces, device or unit
Close or communicate to connect, can be electrical, mechanical or other forms.
The unit as separating component explanation can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can according to the actual needs be selected to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.
If the function is realized and as independent production marketing or when using using in the form of SFU software functional unit, can be with
In being stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be individual
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment methods described of the invention.
And aforesaid storage medium includes：USB flash disk, portable hard drive, read only memory (ROM, Read-Only Memory), random access memory are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (13)
1. a kind of transmission method of physical hybrid automatic repeat request indicator channel PHICH, it is characterised in that include：
PHICH feedback informations and PHICH reference signals are mapped in PHICH resource group, the PHICH reference signals are used
Family equipment demodulates the PHICH feedback informations；
The PHICH resource group is sent to the user equipment；
Wherein, it is described that PHICH feedback informations and PHICH reference signals are mapped in PHICH resource group, including：
Using the scrambler sequence specific to base station, for PHICH feedback informations and PHICH reference signals are scrambled；
Methods described also includes：
According to the cell ID and the deviator specific to the base station of base station place cell, the first mark is obtained, wherein institute
The all base stations for stating cell use identical cell ID, and the configured information of first mark is the deviator；
Specific to the scrambler sequence of base station according to first mark specific to base station is generated；
The configured information for indicating first mark is sent to the user equipment.
2. the method for claim 1, it is characterised in that described to map PHICH feedback informations and PHICH reference signals
To PHICH resource group, including：
The PHICH feedback informations and the PHICH reference signals are mapped to the PHICH resource using different orthogonal codes
Group；Or,
The PHICH feedback informations and the PHICH reference signals are mapped to the different Resource Unit of the PHICH resource group
RE。
3. method as claimed in claim 2, it is characterised in that the PHICH feedback informations and the PHICH reference signals are reflected
The different Resource Unit RE of the PHICH resource group is mapped to, including：
At least one RE is used to map the PHICH reference signals in each RE group in the PHICH resource group.
4. the method as described in any one of claim 1-3, it is characterised in that described to send described to the user equipment
PHICH resource group, including：
Using two orthogonal resources, the PHICH feedback informations are sent on two antenna ports.
5. a kind of transmission method of physical hybrid automatic repeat request indicator channel PHICH, it is characterised in that include：
The PHICH resource group that base station sends is received, PHICH feedback informations and PHICH references are have mapped in the PHICH resource group
Signal；
Using PHICH feedback informations described in the PHICH demodulation reference signals；
Wherein, before using PHICH feedback informations described in the PHICH demodulation reference signals, methods described also includes：
Using the scrambler sequence specific to the base station, the PHICH resource group to being received descrambles；
Methods described also includes：
Receive the first configured information for identifying for indicating specific to the base station；
According to the cell ID and the deviator specific to the base station of base station place cell, first mark is obtained, its
Described in cell all base stations use identical cell ID, it is described first mark configured information be the deviator；
The scrambler sequence specific to the base station is generated according to the described first mark.
6. method as claimed in claim 5, it is characterised in that described using PHICH described in the PHICH demodulation reference signals
Feedback information, including：
Obtain experiencing the PHICH reference signals after transmission from the PHICH resource group, after the experience transmission
PHICH reference signals obtain the channel estimation value of the PHICH resource group, it is described using channel estimation value demodulation
PHICH feedback informations, wherein the PHICH feedback informations and the PHICH reference signals use different orthogonal codes, Huo Zhesuo
State PHICH feedback informations and the PHICH reference signals are mapped to the different Resource Unit RE of the PHICH resource group.
7. the method as described in claim 5 or 6, it is characterised in that the PHICH resource group that the reception base station sends, including：
Receive the PHICH feedback informations that the base station is sent using two orthogonal resources on two antenna ports.
8. a kind of base station, it is characterised in that include：
Map unit, for physical hybrid automatic repeat request indicator channel PHICH feedback informations and PHICH reference signals to be reflected
It is mapped in PHICH resource group, the PHICH reference signals are used for user equipment and demodulate the PHICH feedback informations；
Transmitting element, for sending the PHICH resource group of the map unit mapping to the user equipment；
The map unit is specifically for using the scrambler sequence specific to base station, believing PHICH feedback informations and PHICH references
Number scrambled；
The base station also includes signal generating unit, for according to the cell ID of base station place cell and specific to the base station
Deviator, the first mark is obtained, wherein all base stations of the cell use identical cell ID, the transmitting element to send
First mark configured information be the deviator；
The signal generating unit is additionally operable to generate the scrambler sequence specific to base station according to first mark specific to base station
Row；
The transmitting element is additionally operable to send the configured information for indicating first mark to the user equipment.
9. base station as claimed in claim 8, it is characterised in that the map unit is specifically for by the PHICH feedback letters
Breath and the PHICH reference signals are mapped to the PHICH resource group using different orthogonal codes, or, the PHICH is anti-
Feedforward information and the PHICH reference signals are mapped to the different Resource Unit RE of the PHICH resource group.
10. base station as claimed in claim 8 or 9, it is characterised in that the transmitting element is specifically for using two orthogonal moneys
Source, sends the PHICH feedback informations on two antenna ports.
11. a kind of user equipmenies, it is characterised in that include：
Receiving unit, it is described for receiving the physical hybrid automatic repeat request indicator channel PHICH resource group of base station transmission
PHICH feedback informations and PHICH reference signals are have mapped in PHICH resource group；
Demodulating unit, for using PHICH feedback informations described in the PHICH demodulation reference signals；
The user equipment also includes Descrambling unit, for using the scrambler sequence specific to the base station, receiving single to described
The PHICH resource group that unit receives is descrambled；
The receiving unit, is additionally operable to receive the first configured information for identifying for indicating specific to the base station；
The Descrambling unit, is additionally operable to the cell ID and the deviator specific to the base station according to base station place cell,
First mark is obtained, wherein all base stations of the cell use identical cell ID, what the receiving unit was received
The configured information of first mark is the deviator；
The Descrambling unit, is additionally operable to generate the scrambler sequence specific to the base station according to the described first mark.
12. user equipmenies as claimed in claim 11, it is characterised in that the demodulating unit is specifically for from the PHICH
Resource group obtains experiencing the PHICH reference signals after transmission, according to the PHICH reference signals after the experience transmission
The channel estimation value of the PHICH resource group is obtained, using the channel estimation value PHICH feedback informations are demodulated, wherein
The PHICH feedback informations and the PHICH reference signals use different orthogonal codes, or the PHICH feedback informations and
The PHICH reference signals are mapped to the different Resource Unit RE of the PHICH resource group.
13. user equipmenies as described in claim 11 or 12, it is characterised in that the receiving unit is described specifically for receiving
The PHICH feedback informations that base station is sent using two orthogonal resources on two antenna ports.
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| CN201210063531.6A CN103312464B (en) | 2012-03-12 | 2012-03-12 | Transmission method and device for physical hybrid automatic repeat request indicator channel |
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| CN201210063531.6A CN103312464B (en) | 2012-03-12 | 2012-03-12 | Transmission method and device for physical hybrid automatic repeat request indicator channel |
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| CN105763295B (en) * | 2014-12-19 | 2019-09-13 | 深圳市中兴微电子技术有限公司 | A kind of data processing method and device |
| CN107409018B (en) * | 2015-02-28 | 2019-12-24 | 华为技术有限公司 | Feedback method, device and communication system |
| KR20190095245A (en) * | 2016-12-19 | 2019-08-14 | 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 | Signal transmission method, network device and terminal device |
| CN108365934A (en) * | 2017-01-26 | 2018-08-03 | 索尼公司 | Wireless communications method and wireless telecom equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2088709A2 (en) * | 2008-02-07 | 2009-08-12 | Samsung Electronics Co., Ltd. | Methods and apparatus to allocate acknowledgement channels |
| CN101848544A (en) * | 2010-04-30 | 2010-09-29 | 中兴通讯股份有限公司 | Mapping method and device of PHICH resources |
| CN102340386A (en) * | 2010-07-20 | 2012-02-01 | 北京海兰德维通信技术有限公司 | Transmission method and system of physical hybrid automatic repeat request indicator channel |
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2012
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2088709A2 (en) * | 2008-02-07 | 2009-08-12 | Samsung Electronics Co., Ltd. | Methods and apparatus to allocate acknowledgement channels |
| CN101848544A (en) * | 2010-04-30 | 2010-09-29 | 中兴通讯股份有限公司 | Mapping method and device of PHICH resources |
| CN102340386A (en) * | 2010-07-20 | 2012-02-01 | 北京海兰德维通信技术有限公司 | Transmission method and system of physical hybrid automatic repeat request indicator channel |
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