CN102123022B - Method and device for mapping demodulation reference signals (DMRS) - Google Patents
Method and device for mapping demodulation reference signals (DMRS) Download PDFInfo
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Abstract
The invention discloses a method and device for mapping demodulation reference signals (DMRS). The method comprises the following steps: treating the DMRS by orthogonal code cover (OCC) and mapping the DMRS treated by OCC on physical resource blocks (PRB) according to the DMRS overheads and DMRS positions in each PRB, wherein when the extended cyclic prefix (CP) is adopted, the same total DMRS overhead is adopted in each PRB under the condition of different downlink transmission layer numbers. The method and the device have the beneficial effects of ensuring the DMRS to be backward compatible during mapping and reducing the mapping complexity of the transmitting end and the receiving complexity of the receiving end.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of mapping method and device of demodulation reference mark.
Background technology
High-order multi-antenna technology is one of key technology of senior Long Term Evolution (LTE-A or LTE-Advanced, Long TermEvolution Advanced) system, in order to improve system transfer rate.In order to realize the channel quality measurement after introducing high-order multi-antenna technology and data demodulates, LTE-Advanced system respectively defines two class frequency pilot signs: demodulation reference mark (DMRS, Demodulation ReferenceSignal) and channel quality measurement reference symbol (CSI-RS, Channel State Information-Reference Signal), wherein, DMRS is used for the demodulation of Physical Downlink Shared Channel (PDSCH, PhysicalDownlink Shared Channel).The CSI-RS measured for CSI (channel state information) indicates (CQI for channel quality, Channel Quality Indicator), pre-coding matrix instruction (PMI, Precoding Matrix Indicator), the reporting of stratum's instruction information such as (RI, Rank Indicator).The structure of two class reference symbols may be used for supporting as multipoint cooperative (CoMP, Coordinated Multi-Point), the new technical feature of the LTE-A such as spatial reuse.
In LTE, that adopt is common reference symbol (CRS, Common Reference Signal) carry out pilot measurement, namely all users use common pilot to carry out channel estimating, this CRS needs emitting side additional notifications receiving terminal to have employed which kind of pretreatment mode to the data of launching, expense is larger simultaneously, in addition in multi-user's multiple-input and multiple-output (MU-MIMO), because multiple UE is using identical CRS, the orthogonal of pilot tone cannot be realized, be therefore unable to estimate interference.
In LTE-A, in order to reduce the expense of pilot tone, witness mark symbol and demodulation reference mark are separately designed, demodulated reference signal and the identical pretreatment mode of data acquisition, simultaneously according to the available order information MAP reference symbol of dispatched users respective channels, therefore can be adaptive according to order information adjustment expense, like this in the situation that order is lower, greatly expense can be reduced.The feature of demodulation reference mark comprises: (1) terminal is distinctive, the identical precoding processing of data acquisition of demodulation reference mark as corresponding in: particular terminal and dispatched users; (2) on the resource that only to exist only in network side (as eNodeB) is dispatched by transfer of data and layer; (3) at network side, the demodulation reference mark that different layers transmits is mutually orthogonal.
When adopting extended cyclic prefix (CP, Cyclic Prefix), layer (layer) number that a lot of company mentions maximum support is 4, and order (rank) and layer have corresponding relation.In the discussion in early stage, high pass proposes when number of layers is 1 ~ 2, adopts pilot tone pattern as shown in Figure 2 to carry out DMRS mapping; And the companies such as Ericsson propose in number of layers as the pattern shown in 1 ~ 4 employing Fig. 3 carries out DMRS mapping.
Backward compatibility when how to enable DMRS map, and reduce the mapping complex degree of transmitting terminal and the reception complexity of receiving terminal, be the problem needing solution at present badly.
Summary of the invention
The technical problem to be solved in the present invention is exactly the mapping method and the device that propose a kind of demodulation reference mark, can reduce the mapping complex degree of transmitting terminal and the reception complexity of receiving terminal.
In order to solve the problems of the technologies described above, the invention provides a kind of mapping method of demodulation reference mark, comprising:
Demodulation reference mark orthogonal mask (OCC) is processed, according to the position of demodulation reference mark expense in each Physical Resource Block (PRB) and demodulation reference mark, the demodulation reference mark through OCC process is mapped on PRB;
Wherein, when adopting extended cyclic prefix (CP), in different downlink transfer number of layers situations, identical total demodulation reference mark expense in each PRB, is adopted.
Further, said method also can have following characteristics:
When the number of layer is 1 or 2, adopt between each layer length be 2 OCC code carry out Orthogonal Frequency Division Multiplexing in time domain direction.
Further, said method also can have following characteristics:
When the number of layer is 3 or 4, adopt between each layer length be 4 OCC code carry out Orthogonal Frequency Division Multiplexing in time domain direction.
Further, said method also can have following characteristics:
When the number of layer is 3 or 4, between each layer, adopt the hybrid multiplex mode of code division multiplexing and frequency division multiplexing:
RE corresponding for all DMRS mapped is divided into two groups by frequency domain at equal intervals, and often corresponding 2 layers of group, adopt frequency division multiplexing between two groups;
Each layer in same group adopt length be 2 OCC code, often two-layerly in time domain direction carry out Orthogonal Frequency Division Multiplexing.
Further, said method also can have following characteristics:
When the number of layer is 5 ~ 8, between each layer, adopt the hybrid multiplex mode of code division multiplexing and frequency division multiplexing:
RE corresponding for all DMRS mapped is divided into two groups by frequency domain at equal intervals, and often corresponding 4 layers of group, adopt frequency division multiplexing between two groups;
Each layer in same group adopt length be 4 OCC code, often two-layerly in time domain direction carry out Orthogonal Frequency Division Multiplexing.
Further, said method also can have following characteristics:
In each PRB, total demodulation reference mark expense is 16 RE or 24 RE.
Further, said method also can have following characteristics:
The frequency domain carriers of the RE that demodulation reference mark is corresponding is spaced apart 1 or 2 carrier spacing, and the carrier spacing of every layer of DMRS between PRB and/or in PRB is identical; The time domain mapped corresponding 5th, 6,11,12 OFDM symbols.
Further, said method also can have following characteristics:
On the different time-gap of a subframe, frequency domain position corresponding to demodulation reference mark carries out the staggered of 1 carrier wave or 2 carrier waves.
In order to solve the problems of the technologies described above, the invention provides a kind of mapping device of demodulation reference mark, comprise OCC processing module and mapping block;
Described OCC processing module is used for demodulation reference mark OCC process;
Described mapping block is used for the position according to demodulation reference mark expense and demodulation reference mark in each PRB, is mapped on PRB by the demodulation reference mark through OCC process; Wherein, when adopting expansion CP, in different downlink transfer number of layers situations, identical total demodulation reference mark expense in each PRB, is adopted.
Further, said apparatus also can have following characteristics:
In each PRB, total demodulation reference mark expense is 16 RE or 24 RE.
Backward compatibility when the present invention can make DMRS map, and reduce the mapping complex degree of transmitting terminal and the reception complexity of receiving terminal.When user's speed of service is higher, when channel performance is poor, transmit with 1 or 2 layers (layer), ensure the transmission quality of user; When user's speed of service is lower, and when channel condition is better, 3 or 4 layer transmission can be used, thus the transmission capacity of the system of guarantee.When number of layers is 1 ~ 2 and number of layers is 3 ~ 4, only need to change orthogonal mask (OCC) length, can accomplish number of layers be 1 ~ 2 and number of layers be 3 ~ 4 preferably compatible.Owing to adopting identical DMRS expense, the present invention avoids when different layers number simultaneously, and the deviation between the data power in the signal power of every layer of DMRS and respective layer, reduces reception complexity, without the need to using extra control signal notice.
Accompanying drawing explanation
Fig. 1 a is in normal cyclic prefix situation, and the number of layers of conventional subframe is the demodulation reference mark pattern baseline (baseline) of 1 ~ 4;
Fig. 1 b is in normal cyclic prefix situation, and during descending pilot frequency time slot configuration 12 or 11 OFDM symbol, number of layers is the demodulation reference mark pattern baseline (baseline) of 1 ~ 4;
Fig. 1 c is in normal cyclic prefix situation, and during descending pilot frequency time slot configuration 10 or 9 OFDM symbol, number of layers is the demodulation reference mark pattern baseline (baseline) of 1 ~ 4;
Fig. 2 ~ Fig. 3 is the demodulation reference mark configurations scheme in existing expansion CP situation;
Fig. 4 a and Fig. 4 b is the number of layers of the embodiment of the present invention one adopts the demodulation reference mark configurations scheme of the DMRS expense of 24 RE when being 3 ~ 4;
Fig. 5 a and Fig. 5 b is the number of layers of the embodiment of the present invention one adopts the demodulation reference mark configurations scheme of the DMRS expense of 16 RE when being 3 ~ 4;
Demodulation reference mark configurations scheme when being 3 ~ 4 that Fig. 6 is the number of layers of the embodiment of the present invention two;
Demodulation reference mark configurations scheme when being 5 ~ 8 that Fig. 7 is the number of layers of the embodiment of the present invention three;
Fig. 8 is the device schematic diagram of the embodiment of the present invention.
Embodiment
Simulation result shows, in employing expansion CP situation, when main consideration Vehicle B (vehicle-mounted B) channel circumstance, it is best that frequency domain carriers is spaced apart 1 carrier performance, and when interval is greater than 1 carrier wave, performance can decline.When considering TU (Typical Urban, typical city) channel scenario, when the carrier spacing is 3 ~ 4, performance is best.Adopt the pattern shown in Fig. 3, under high speed TU channel situation, due to stagger (interlocking), performance can be made to decline to some extent.
When adopting the maximum support of expansion CP 4 layers of transmission, be now mainly used in the user that speed is lower, for the user that speed is lower, its channel corresponding time-domain coherence time is longer, can suppose that channel is substantially constant in a subframe; Or main at middle low speed user, it is not very serious situation that frequency domain selectivity is led relatively.Number of layers is the design of 3 ~ 4 simultaneously, should be that the pattern of 1 ~ 2 is compatible with number of layers as far as possible.
The mapping method of demodulation reference mark of the present invention comprises: by demodulation reference mark OCC process, according to the position of demodulation reference mark expense and demodulation reference mark in each PRB, is mapped on PRB by the demodulation reference mark through OCC process; Wherein, when adopting expansion CP, in different downlink transfer number of layers situations, identical total demodulation reference mark expense in each PRB, is adopted.
Preferably, when the maximum layer number of system support equals 4, the code division multiplexing mode in time domain direction can be adopted to carry out DMRS multiplexing, specifically comprise:
When the number of layer is 1 or 2, adopt between each layer length be 2 OCC code carry out Orthogonal Frequency Division Multiplexing in time domain direction;
When the number of layer is 3 or 4, adopt between each layer length be 4 OCC code carry out Orthogonal Frequency Division Multiplexing in time domain direction.
Preferably, when the maximum layer number of system support is 8, can adopt the code division multiplexing in time domain direction with time-division/the hybrid multiplex mode that combines of frequency division multiplexing, specifically comprise:
Mode 1: when number of layers is less than or equal to 2, each layer adopts code division multiplexing; When number of layers is 3 ~ 8, can adopt code division multiplexing+time-division/mode of frequency division multiplexing, can be specifically:
When the number of layer is 3 or 4, RE corresponding for all DMRS mapped is divided into two groups by frequency domain at equal intervals, often corresponding 2 layers of group, adopt frequency division multiplexing between two groups; Each layer in same group adopt length be 2 OCC code, often two-layerly in time domain direction carry out Orthogonal Frequency Division Multiplexing.That is, in order to compatible with number of layers 1 ~ 2, on frequency domain corresponding when can be 1 ~ 2 by number of layers, RE is equally spaced distributes to layer 1 ~ 2 and layer 3 ~ 4.
When the number of layer is 5 ~ 8, RE corresponding for all DMRS mapped is divided into two groups by frequency domain at equal intervals, often corresponding 4 layers of group, adopt frequency division multiplexing between two groups; Each layer in same group adopt length be 4 OCC code, often two-layerly in time domain direction carry out Orthogonal Frequency Division Multiplexing.
Mode 2: when number of layers is less than or equal to 4, adopts code division multiplexing mode between each layer; When number of layers is 5 ~ 8, adopt the code division multiplexing in time domain direction with time-division/the hybrid multiplex mode that combines of frequency division multiplexing.Can be specifically:
When number of layers is 1 ~ 4, the mode of code division multiplexing is identical with the mode when the maximum support of number of layers 4 layers noted earlier; When number of layers is 5 ~ 8, identical with when in mode 1, number of layers is 5 ~ 8.
In addition, preferably, above-mentioned number of layers is in 1 ~ 8, and in each PRB, total demodulation reference mark expense is 16 RE or 24 RE.
Preferably, the frequency domain carriers of the RE that demodulation reference mark is corresponding is spaced apart 1 or 2 carrier spacing, and is preferably spaced apart 1 carrier wave; The carrier spacing of every layer of DMRS between PRB and/or in PRB is identical; The time domain mapped corresponding 5th, 6,11,12 OFDM symbol.
On the different time-gap of a subframe, frequency domain position corresponding to demodulation reference mark can carry out the staggered of 1 carrier wave or 2 carrier waves.
Equal for the number of layers of distributing the process that 4 are described OCC process below, hypothesis 4 layers carry out the orthogonal code that code division multiplexing adopts and are respectively simultaneously
c
11，c
12，c
13，c
14； c
21，c
22，c
23，c
24； c
31，c
32，c
33，c
34； c
41，c
42，c
43，c
44
For single user multiple-input and multiple-output (SU-MIMO), adopt identical demodulation reference mark sequence between each layer, r (xn
1+ 1) ... ..r (x (n
2+ 1)), p is denoted as
0, p
1, p
2... .., p
k-1, k=x (n
2-n
1+ 1) be sequence length, and process by the orthogonal code that different layers is corresponding respectively, after process, the demodulation reference mark sequence of each layer correspondence is respectively:
layer0：c
11p
0，c
12p
1，c
13p
2，c
14p
3，c
11p
5，c
12p
6，....c
14p
k
layer1：c
21p
0，c
22p
1，c
23p
2，c
24p
3，c
21p
5，c
22p
6，....c
24p
k
layer2：c
31p
0，c
32p
1，c
33p
2，c
34p
3，c
31p
5，c
32p
6，....c
34p
k’
layer3：c
41p
0，c
42p
1，c
43p
2，c
44p
3，c
41p
5，c
42p
6，....c
44p
k
Actual when realizing, also can carry out upset in the orthogonal code of different layers and map, afterwards demodulation reference mark sequence be processed.
Below in conjunction with drawings and the specific embodiments, the present invention is described in detail.
Embodiment 1
With reference to Fig. 4 ~ Fig. 5, demodulation reference mark is carried out OCC process, according to the position of demodulation reference mark and expense demodulation reference mark in each PRB, the demodulation reference mark through OCC process is mapped on PRB.
Wherein Fig. 4 a is the pattern based on Fig. 2, a kind of demodulation reference mark detail of design based on CDM of design, according to this pattern, identical demodulation reference mark pilot-frequency expense is kept when being 1 ~ 2 when number of layers is 3 ~ 4 with number of layers, i.e. 24RE/PRB, the frequency domain interval of the demodulation reference mark that same layer is corresponding is 1 subcarrier; The situation of Fig. 5 a to be demodulation reference mark expense be 16RE/PRB, the demodulation reference mark frequency domain interval that now same layer is corresponding is 2 subcarriers.On time domain direction, carry out CDM between each layer multiplexing, OCC code namely used carries out Orthogonal Frequency Division Multiplexing to the demodulation reference mark on distinct symbols on time domain direction, (RE in the OFDM symbol as shown in oval frame in figure).Shared RE position is respectively (x, y), and wherein x represents the index of OFDM symbol, and y represents the phase sub-carrier sequence number in a PRB, and the value of x and y is
Or
CDM is multiplexing to carry out in the different OFDM symbol of same frequency domain position.Namely according to above-mentioned position, be example when taking expense as 24RE/PRB, the RE of DMRS is divided into 6 groups, and the RE in each group carries out code division multiplexing, is respectively:
Group 1:{ (x
1, y
1), (x
2, y
1), (x
3, y
1), (x
4, y
1),
Group 2:{ (x
1, y
2), (x
2, y
2), (x
3, y
2), (x
4, y
2),
Group 3:{ (x
1, y
3), (x
2, y
3), (x
3, y
3), (x
4, y
3),
Group 4:{ (x
1, y
4), (x
2, y
4), (x
3, y
4), (x
4, y
4),
Group 5:{ (x
1, y
5), (x
2, y
5), (x
3, y
5), (x
4, y
5),
Group 6:{ (x
1, y
6), (x
2, y
6), (x
3, y
6), (x
4, y
6)
When expense is 16 RE/PRB, the RE of DMRS is divided into 4 groups, the RE in each group carries out the code division multiplexing of OCC=4, is respectively:
Group 1:{ (x
1, y
1), (x
2, y
1), (x
3, y
1), (x
4, y
1),
Group 2:{ (x
1, y
2), (x
2, y
2), (x
3, y
2), (x
4, y
2),
Group 3:{ (x
1, y
3), (x
2, y
3), (x
3, y
3), (x
4, y
3),
Group 4:{ (x
1, y
4), (x
2, y
4), (x
3, y
4), (x
4, y
4),
In the above example, in order to adaptation layer number is the process of 2, also can to the position of above-mentioned correspondence, will with x
3and x
4the basis of corresponding above-mentioned frequency domain position adds the skew of 1 or 2 carrier wave, even the y of its correspondence
k=y
k+ Δ l, Δ l are 1 or 2.As shown in Fig. 4 b and Fig. 5 b.
Embodiment 2
When number of layers is 3 ~ 4, based on mapping mode of the present invention another specific embodiment as shown in Figure 6.Overhead still remains 24 RE, on frequency domain direction, is divided into 2 groups by equally spaced for demodulation pilot frequency symbol:
And every 2 layers of correspondence one group of RE carries out the code division multiplexing that OCC length is 2 in adjacent two OFDM symbol, and when the frequency domain position of two groups carries out the rotation of frequency domain Inner eycle, rotate size identical.
Simultaneously, number of layers for 3 ~ 4 time each layer shared by total DMRS position and number of layers for 1 ~ 2 time each layer shared by the position of total DMRS RE identical, RE when being 1 ~ 2 by number of layers is divided into 2 groups, distributes to first 2 layers and latter 2 layers when number of layers is 3 ~ 4 respectively.
Embodiment 3
Number of layers for for 5 ~ 8 time, based on mapping mode of the present invention schematic diagram as shown in Figure 7, when identical with RE position with the expense of layer 3 ~ 4 pattern, the length arranging OCC is 4, and carries out code division multiplexing in 4 OFDM symbol of time domain.All RE are divided into 2 groups frequency domain is equally spaced simultaneously, and often organize the DMRS of multiplexing 4 layers of RE, between two groups, adopt frequency division multiplexing.
As shown in Figure 8, the mapping device of the demodulation reference mark of the embodiment of the present invention, can be applicable to the transmitting terminal of base station or subscriber equipment (UE), comprises OCC processing module and mapping block;
Described OCC processing module is used for demodulation reference mark OCC process;
Described mapping block is used for the position according to demodulation reference mark expense and demodulation reference mark in each PRB, is mapped on PRB by the demodulation reference mark through OCC process; Wherein, when adopting expansion CP, in different downlink transfer number of layers situations, identical total demodulation reference mark expense in each PRB, is adopted.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (9)
1. a mapping method for demodulation reference mark, comprising:
By demodulation reference mark orthogonal mask OCC process, according to the position of demodulation reference mark DMRS expense and demodulation reference mark in each Physical Resource Block PRB, the demodulation reference mark through OCC process is mapped on PRB;
Wherein, when adopting extended cyclic prefix CP, in different downlink transfer number of layers situations, identical total demodulation reference mark expense in each PRB, is adopted;
The frequency domain carriers of the resource particle RE that demodulation reference mark is corresponding is spaced apart 1 or 2 carrier spacing, and the carrier spacing of every layer of DMRS between PRB and/or in PRB is identical; The time domain mapped corresponding 5th, 6,11,12 OFDM symbols.
2. the method for claim 1, is characterized in that,
When the number of layer is 1 or 2, adopt between each layer length be 2 OCC code carry out Orthogonal Frequency Division Multiplexing in time domain direction.
3. the method for claim 1, is characterized in that,
When the number of layer is 3 or 4, adopt between each layer length be 4 OCC code carry out Orthogonal Frequency Division Multiplexing in time domain direction.
4. the method for claim 1, is characterized in that,
When the number of layer is 3 or 4, between each layer, adopt the hybrid multiplex mode of code division multiplexing and frequency division multiplexing:
RE corresponding for all DMRS mapped is divided into two groups by frequency domain at equal intervals, and often corresponding 2 layers of group, adopt frequency division multiplexing between two groups;
Each layer in same group adopt length be 2 OCC code, often two-layerly in time domain direction carry out Orthogonal Frequency Division Multiplexing.
5. the method for claim 1, is characterized in that,
When the number of layer is 5 ~ 8, between each layer, adopt the hybrid multiplex mode of code division multiplexing and frequency division multiplexing:
RE corresponding for all DMRS mapped is divided into two groups by frequency domain at equal intervals, and often corresponding 4 layers of group, adopt frequency division multiplexing between two groups;
Each layer in same group adopt length be 4 OCC code, often two-layerly in time domain direction carry out Orthogonal Frequency Division Multiplexing.
6., as the method in Claims 1 to 5 as described in any one, it is characterized in that,
In each PRB, total demodulation reference mark expense is 16 RE or 24 RE.
7., as the method in Claims 1 to 5 as described in any one, it is characterized in that,
On the different time-gap of a subframe, frequency domain position corresponding to demodulation reference mark carries out the staggered of 1 carrier wave or 2 carrier waves.
8. a mapping device for demodulation reference mark, is characterized in that, comprises orthogonal mask OCC processing module and mapping block;
Described OCC processing module is used for demodulation reference mark OCC process;
Described mapping block is used for the position according to demodulation reference mark expense and demodulation reference mark in each Physical Resource Block PRB, is mapped on PRB by the demodulation reference mark through OCC process; Wherein, when adopting extended cyclic prefix CP, in different downlink transfer number of layers situations, identical total demodulation reference mark expense in each PRB, is adopted;
The frequency domain carriers of the resource particle RE that demodulation reference mark is corresponding is spaced apart 1 or 2 carrier spacing, and the carrier spacing of every layer of demodulation reference mark DMRS between PRB and/or in PRB is identical; The time domain mapped corresponding 5th, 6,11,12 OFDM symbols.
9. device as claimed in claim 8, is characterized in that,
In each PRB, total demodulation reference mark expense is 16 RE or 24 RE.
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| CN103096479B (en) * | 2011-11-03 | 2016-05-25 | 中国移动通信集团公司 | A kind of sending method of uplink demodulation reference signal and equipment |
| CN103248469B (en) * | 2012-02-03 | 2018-05-11 | 中兴通讯股份有限公司 | Transmission, detection method, system and the base station of a kind of control signaling and demodulation pilot tone |
| CN107925991B (en) * | 2015-08-19 | 2020-10-16 | 华为技术有限公司 | Reference signal configuration method and equipment |
| CN107113272B (en) * | 2015-09-25 | 2019-11-26 | 华为技术有限公司 | A kind of method for mapping resource and device |
| CN107181579A (en) * | 2016-03-11 | 2017-09-19 | 北京信威通信技术股份有限公司 | A kind of descending DMRS resource multiplexing methods |
| CN107623563A (en) * | 2016-07-11 | 2018-01-23 | 北京信威通信技术股份有限公司 | A kind of method and device of configuration DMRS in V2X communications |
| CN108347320B (en) * | 2017-01-24 | 2022-05-10 | 中兴通讯股份有限公司 | Method and device for processing transmission power state conversion time |
| CN115842704B (en) * | 2021-09-18 | 2024-06-21 | 大唐联仪科技有限公司 | Uplink signal subframe synchronization method, equipment, device and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1274498A (en) * | 1998-07-20 | 2000-11-22 | 三星电子株式会社 | Quasi-orthogonal code mask generating device in mobile communication system |
| CN101577563A (en) * | 2008-05-07 | 2009-11-11 | 大唐移动通信设备有限公司 | Method, device and base station for transmitting PMCH in special subframe |
-
2010
- 2010-01-08 CN CN201010003861.7A patent/CN102123022B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1274498A (en) * | 1998-07-20 | 2000-11-22 | 三星电子株式会社 | Quasi-orthogonal code mask generating device in mobile communication system |
| CN101577563A (en) * | 2008-05-07 | 2009-11-11 | 大唐移动通信设备有限公司 | Method, device and base station for transmitting PMCH in special subframe |
Non-Patent Citations (2)
| Title |
|---|
| Investigation for DMRS of rank 5~8;sunyunfeng;《3GPP TSG RAN WG1 Meeting #59 R1-094751》;20091113;正文第2页第2.1节第2-3及6-7行、第6页第2.3节第6行、第7页第3节第3-4行 * |
| UE-RS Patterns for Extended CP;Qualcomm Europe;《3GPP TSG RAN WG1 Meeting #59 R1-094860》;20091113;全文 * |
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