CN104105202B - Communication means based on new carrier type and equipment - Google Patents
Communication means based on new carrier type and equipment Download PDFInfo
- Publication number
- CN104105202B CN104105202B CN201310113449.4A CN201310113449A CN104105202B CN 104105202 B CN104105202 B CN 104105202B CN 201310113449 A CN201310113449 A CN 201310113449A CN 104105202 B CN104105202 B CN 104105202B
- Authority
- CN
- China
- Prior art keywords
- signal
- physical resource
- resource configuration
- signaling
- base station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004891 communication Methods 0.000 title description 16
- 238000000034 method Methods 0.000 claims abstract description 40
- 230000011664 signaling Effects 0.000 claims description 38
- 230000009897 systematic effect Effects 0.000 abstract 1
- 238000013468 resource allocation Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 239000013256 coordination polymer Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention relates to a kind of methods communicated based on new carrier type, including send demodulated reference signal of the demodulated reference signal (DM RS) as system signal and data-signal；Wherein, it is sent as the DM RS signals of the demodulated signal of the system signal using the configuration of preset physical resource；One kind is selected from the configuration of a variety of DM RS physical resources according to systematic parameter, and is sent as the DM RS signals of the demodulated signal of the data-signal using the configuration.The invention further relates to corresponding products for executing the above method.
Description
Technical Field
The present invention relates generally to communication technologies, and in particular, to a communication method and apparatus based on a New Carrier Type (NCT).
Background
In third generation partnership project (3GPP) systems of release 8 and 9 (referred to as rel.8 and 9) of Long Term Evolution (LTE) technology, a Common Reference Signal (CRS) is responsible for demodulation of system signals and data signals, wherein the system signals include Common Search Space (CSS) signals and user specific search space (USS) signals of a Physical Downlink Control Channel (PDCCH), and the system signals further include Physical Broadcast Channel (PBCH) signals. The data signal includes a Physical Downlink Shared Channel (PDSCH) signal. In addition, the CRS is also responsible for measuring Radio Resource Management (RRM)/Radio Link Management (RLM) based on cell selection and handover, and measuring channel quality based on data scheduling.
In the system of rel.10, a demodulation reference signal (DM-RS) is introduced to demodulate a data signal, and a channel state information reference signal (CSI-RS) is introduced to measure a channel quality based on data scheduling, so as to replace a part of functions of a CRS.
In the system of Rel.11, the DM-RS is also responsible for demodulating USS signals in the PDCCH. However, in the existing system, CRS is still employed to demodulate CSS signals and PBCH signals in PDCCH.
At present, in order to avoid collision between a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), a method of adjusting relative positions of the PSS/SSS and the DM-RS in a Physical Resource Block (PRB) and puncturing a part of physical resources occupied by the DM-RS or prohibiting transmission of the PSS/SSS signal in the PRB for transmitting the PDSCH is adopted.
None of the above methods solves the problem of demodulating CSS and PBSH in a separate NCT system, since there is no CRS signal available in the separate NCT system for demodulating such system signals as CSS and PBSH.
Disclosure of Invention
Due to the above problems and considering the diversity of future cellular systems, a single DM-RS design may not meet the requirements of different types of systems, and the present invention employs DM-RS signals with adjustable physical resource allocation to demodulate the system and data signals accordingly
The invention discloses a method for communication based on a new carrier type, which comprises the steps of sending a demodulation reference signal (DM-RS) as a demodulation signal of a system signal and a data signal; wherein the DM-RS signal which is a demodulation signal of the system signal is transmitted by using a preset physical resource configuration; selecting one from a plurality of DM-RS physical resource configurations according to the system parameters, and transmitting the DM-RS signal as a demodulation signal of the data signal by using the configuration.
In particular, the method further includes sending an indication signaling to inform the user equipment of the physical resource configuration type used for sending the DM-RS signal as the data signal demodulation signal.
Specifically, the system signal at least comprises a common search space signal of a physical broadcast channel and a physical downlink control channel.
In particular, the system parameters include at least the number of antennas and/or the channel quality and/or the cell coverage.
Specifically, the indication signaling at least includes downlink control signaling or radio resource control signaling.
In particular, the method further comprises precoding the DM-RS signal.
In particular, the method further includes receiving a feedback signal from the ue, and determining the channel quality according to the feedback signal.
In particular, the method further includes updating the system parameter periodically or based on a base station trigger and adjusting the physical resource configuration type adopted by the DM-RS signal accordingly.
The invention also discloses a base station for executing any method for communication based on the new carrier type.
The invention also discloses a method for carrying out communication based on the new carrier type, which comprises the following steps: receiving a system and/or data signal and a DM-RS signal for demodulating the system and/or data signal from a base station; judging whether an indication signaling about physical resource configuration for sending the DM-RS signal is received or not; under the condition that the indication signaling is not received, a default base station adopts preset default physical resource configuration to send the DM-RS signal, reads the DM-RS signal according to the default resource configuration, and demodulates the system signal by utilizing the DM-RS signal; and under the condition of receiving the indication signaling, determining the physical resource configuration type of the DM-RS signal according to the indication signaling and a preset physical resource configuration index, reading the DM-RS signal according to the determined resource configuration type, and demodulating the data signal by using the DM-RS signal.
Specifically, the signaling at least includes downlink control signaling or radio resource control signaling.
Specifically, the system signal at least comprises a common search space signal of a physical broadcast channel and a physical downlink control channel.
In particular, the method further comprises sending feedback on the channel quality to the base station periodically or based on a base station trigger.
In particular, the method further comprises decoding the precoded DM-RS signal.
Another aspect of the present invention further provides a user equipment for performing any of the above methods for communication based on a new carrier type.
By adopting the method and the product of the invention, no matter the system signal or the data signal in the NCT system can be demodulated by utilizing the DM-RS signal, and the utilization rate of the system resource is improved by adjusting the physical resource configuration mode of the DM-RS according to the system condition.
Drawings
Fig. 1 is a flow chart of a method for NCT-based communication according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method of communicating based on NCT according to another embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a default physical resource configuration of a DM-RS signal for demodulating a signal according to an embodiment of the present invention;
fig. 4(a) is a diagram illustrating one of a plurality of physical resource configurations for a DM-RS signal for demodulating a data signal according to an embodiment of the present invention;
fig. 4(b) is a diagram of another one of a plurality of physical resource configurations of a DM-RS signal for demodulating a data signal according to an embodiment of the present invention;
fig. 5 is an RRC indication signaling according to an embodiment of the present invention; and
fig. 6 is a NCT-based communication system according to one embodiment of the present invention.
Detailed Description
The making and using of embodiments of the present application are discussed in detail below. It should be appreciated, however, that the present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed are merely illustrative of specific ways to make and use the invention, and do not delimit the scope of the invention.
Fig. 1 is a flowchart illustrating a method for performing communication based on NCT according to an embodiment of the present invention. The method may be performed by a base station 602 in the NCT communication system shown in fig. 6. In step 104, the base station 602 first determines whether the DM-RS signal to be transmitted is for demodulating a system signal or a data signal. Wherein the system signals may include PBCH, PDSCH, and/or CSS signals. The data signals may include PDSCH signals.
If the DM-RS to be transmitted is a demodulated signal of the system signal, the base station 602 determines to transmit the DM-RS signal with a preset default physical resource configuration in step 106. According to different situations and needs, there can be a plurality of different default DM-RS physical resource allocation modes. Regardless of the configuration, the common requirement is that the density and the location of the physical resource units occupied by the DM-RS in the default physical resource configuration are fixed, and the default physical resource configuration is stored in the base station and the user equipment in advance before the base station communicates with the user equipment.
Fig. 3(a) shows a conventional DM-RS physical resource allocation, where a DM-RS signal in each PRB pair generally occupies 24 resource elements, and is divided into 6 groups, each group includes 4 elements, and a space between each group is 3 elements. In case of a normal cyclic prefix (normal CP normal SF), DM-RSs are distributed at positions 5 and 6 in a slot; in case of extended cyclic prefix (extended CP normal sf), DM-RSs are distributed at positions 4 and 5 in the slot.
Fig. 3(b) illustrates a default DM-RS physical resource configuration according to an embodiment of the present invention. The DM-RS signals occupy 16 physical resource elements in each PRB pair, and are divided into 8 groups of 2 elements, and the space between each group is 2 elements. The reduced spacing improves the robustness of the reception of the system signal. The DM-RSs in fig. 3(b) are distributed at positions of 0 and 1 in even slots, and positions of 2 and 3 in odd slots. Such a configuration is more advantageous in improving the accuracy of transmitting system signals in consideration of the conventional location of the PBCH. In addition, the DM-RS density in fig. 3(b) is reduced compared to the conventional configuration, which saves more physical resources.
By employing a default DM-RS physical resource configuration as shown in fig. 3(b) or other types, the user equipment in the NCT cell can successfully demodulate the system signal after being powered on and start initial communication with the base station.
If the DM-RS signal to be transmitted is a demodulated signal of the data signal, the base station 602 selects one of the physical resource allocation manners as the physical resource allocation manner of the DM-RS signal according to the system parameter in step 108. The system parameters may include the number of antennas in the system, the channel quality, and/or the coverage area of the cell, etc.
According to one embodiment of the invention, the larger the number of antennas in the system, the more physical resources occupied by the DM-RS signal. The better the channel quality, the less physical resources the DM-RS signal may occupy. The smaller the coverage of the cell, the less physical resources occupied by the DM-RS signal may be.
Table 1 lists several of many possible DM-RS physical resource configurations. Those skilled in the art can design various resource allocation modes without departing from the invention. Configuration 0 in table 1 is the default DM-RS signal physical resource configuration for transmitting the DM-RS of the demodulated system signal.
Configurations 1 and 2 (not shown in the figure) in table 1 are for transmitting DM-RS for demodulating data signals in a conventional DM-RS physical resource configuration manner when the number of antennas in the system is different. According to an embodiment of the present invention, the number of physical resource units occupied by configuration 1 may be half of that of configuration 2, but the DM-RS resource units that are not occupied in configuration 1 may be reserved and not used for transmitting data signals.
Configurations 3 and 4 in table 1 correspond to the configurations shown in fig. 4(a) and (b), respectively. According to the analysis of the system parameters, the physical resource density occupied by the DM-RS in configurations 3 and 4 is correspondingly reduced, and the saved resource units can be used for transmitting data signals.
TABLE 1
In step 110, the base station 602 sends signaling to the user equipment 604 to inform the physical resource configuration mode of the DM-RS signal. According to an embodiment of the present invention, the signaling may be radio resource control signaling (RRC). Fig. 5 shows an example of indicating, by RRC signaling, a physical resource configuration manner used by a DM-RS signal transmitted by a base station of a user equipment. Where 502 is a portion indicating a DM-RS physical resource configuration. Those of ordinary skill in the art may make the same indication in RRC signaling in other ways without departing from the scope of the present invention.
According to another embodiment of the present invention, a downlink control signaling (DCI) may be used to indicate a physical resource configuration of a DM-RS signal of a user equipment. Those skilled in the art can add the above indication by updating the structure of the conventional DCI signaling in different ways without departing from the scope of the present invention. Since the DCI is an upper layer signaling and the RRC is a lower layer signaling, the updating speed of the DCI signaling may be higher than that of the RRC signaling, so as to dynamically update the DM-RS physical resource configuration indication.
According to an embodiment of the present invention, the base station 602 may also precode the DM-RS signal in step 102 before transmitting the DM-RS signal. In order to preserve the original sequence and structure of the DM-RS signal, according to an embodiment of the present invention, the base station 602 may perform rank-1pre-coding (rank-1pre-coding) on the DM-RS signal by using a codebook corresponding to index 0.
Fig. 2 is a flowchart of a NCT-based communication method according to an embodiment of the present invention. The method may be performed by a user equipment 604 in the NCT communication system shown in fig. 6. In step 202, the user equipment 604 first receives a system signal and/or a data signal and a DM-RS signal for demodulating the system signal and/or the data signal from the base station 602. In step 206, the user equipment 604 determines whether indication signaling about DM-RS physical resource configuration is received.
If no indication signaling is received, the user equipment 604 defaults to the DM-RS being a demodulated signal of a system signal and transmits with a default physical resource configuration in step 208. According to an embodiment of the present invention, the user equipment 604 obtains specific information of a default physical resource configuration according to a configuration index pre-stored therein, for example, as shown in table 1, and reads a DM-RS signal according to the configuration, thereby demodulating a system signal using the DM-RS signal.
If the user equipment 604 receives the physical resource allocation signaling related to DM-RS from the base station 602, then in step 210, the user equipment 604 selects the configuration specified from the several DM-RS physical resource allocations according to the indication in the signaling and the resource allocation index pre-stored in the user equipment as shown in table 1, and reads the DM-RS signal according to the configuration, thereby demodulating the data signal by using the DM-RS signal.
In step 204, the user equipment 604 may decode the precoded DM-RS, according to one embodiment of the present invention.
The user equipment 604 may also send feedback to the base station 602 regarding the channel quality periodically or on demand, according to an embodiment of the invention.
Figure 6 shows a NCT-based communication network. According to an embodiment of the present invention, the base station 602 and the user equipment 604 may be respectively configured to perform one or more of the methods described above.
Those skilled in the art will readily recognize that the materials and methods may be varied within the scope of the present invention. It should also be appreciated that the present invention provides many applicable inventive concepts in addition to the specific context for illustrating the embodiments. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.
Claims (13)
1. A method of communicating based on a new carrier type, comprising:
determining whether a demodulation reference signal (DM-RS) to be transmitted is for demodulating a system signal or a data signal; wherein,
transmitting the DM-RS signal which is a demodulation signal of the system signal by using a preset physical resource configuration under the condition that the demodulation reference signal to be transmitted is the demodulation signal of the system signal;
and when the demodulation reference signal to be transmitted is a demodulation signal of the data signal, selecting one of a plurality of DM-RS physical resource configurations according to a system parameter, and transmitting the DM-RS signal which is the demodulation signal of the data signal by using the configuration.
2. The method of claim 1, further comprising sending an indication signaling to inform a user equipment of a physical resource configuration type employed for transmitting the DM-RS signal as the data signal demodulation signal.
3. The method of claim 1, wherein the system signal comprises at least a common search space signal of a physical broadcast channel and/or a physical downlink control channel.
4. The method according to claim 1, wherein the system parameters comprise at least the number of antennas and/or the channel quality and/or the cell coverage.
5. The method of claim 2, wherein the indication signaling comprises at least downlink control signaling or radio resource control signaling.
6. The method of claim 1 further comprising precoding the DM-RS signal.
7. The method of claim 4 further comprising receiving a feedback signal from the user equipment and determining the channel quality based on the feedback signal.
8. The method of claim 1 further comprising updating the system parameters periodically or based on a base station trigger and adjusting the physical resource configuration category adopted by the DM-RS signal accordingly.
9. A method of communicating based on a new carrier type, comprising:
receiving a system and/or data signal and a DM-RS signal for demodulating the system and/or data signal from a base station;
judging whether an indication signaling about physical resource configuration for sending the DM-RS signal is received or not;
under the condition that the indication signaling is not received, a default base station adopts preset default physical resource configuration to send the DM-RS signal, reads the DM-RS signal according to the default resource configuration, and demodulates the system signal by utilizing the DM-RS signal; and is
And under the condition of receiving the indication signaling, determining the physical resource configuration type of the DM-RS signal according to the indication signaling and a preset physical resource configuration index, reading the DM-RS signal according to the determined resource configuration type, and demodulating the data signal by using the DM-RS signal.
10. The method of claim 9, wherein the signaling comprises at least downlink control signaling or radio resource control signaling.
11. The method of claim 9, wherein the system signal comprises at least a common search space signal of a physical broadcast channel and/or a physical downlink control channel.
12. The method of claim 9 further comprising sending feedback to the base station regarding channel quality, periodically or based on base station triggers.
13. The method of claim 9 further comprising decoding the precoded DM-RS signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310113449.4A CN104105202B (en) | 2013-04-02 | 2013-04-02 | Communication means based on new carrier type and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310113449.4A CN104105202B (en) | 2013-04-02 | 2013-04-02 | Communication means based on new carrier type and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104105202A CN104105202A (en) | 2014-10-15 |
| CN104105202B true CN104105202B (en) | 2018-10-09 |
Family
ID=51672904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310113449.4A Active CN104105202B (en) | 2013-04-02 | 2013-04-02 | Communication means based on new carrier type and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104105202B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011085702A1 (en) * | 2010-06-28 | 2011-07-21 | 华为技术有限公司 | Resource configuration methods for dedicated demodulation reference signal and relevant apparatuses |
| CN102170646A (en) * | 2010-02-26 | 2011-08-31 | 电信科学技术研究院 | Method, system and device for configuring backhaul link resources of relay system |
| CN102340382A (en) * | 2011-10-28 | 2012-02-01 | 电信科学技术研究院 | Method and device for configuring DMRS (demodulation reference signal) scrambling code sequence |
| CN102404854A (en) * | 2011-11-04 | 2012-04-04 | 中兴通讯股份有限公司 | Resource allocation method and resource allocation system for uplink demodulation reference signals (DMRSs) |
-
2013
- 2013-04-02 CN CN201310113449.4A patent/CN104105202B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170646A (en) * | 2010-02-26 | 2011-08-31 | 电信科学技术研究院 | Method, system and device for configuring backhaul link resources of relay system |
| WO2011085702A1 (en) * | 2010-06-28 | 2011-07-21 | 华为技术有限公司 | Resource configuration methods for dedicated demodulation reference signal and relevant apparatuses |
| CN102340382A (en) * | 2011-10-28 | 2012-02-01 | 电信科学技术研究院 | Method and device for configuring DMRS (demodulation reference signal) scrambling code sequence |
| CN102404854A (en) * | 2011-11-04 | 2012-04-04 | 中兴通讯股份有限公司 | Resource allocation method and resource allocation system for uplink demodulation reference signals (DMRSs) |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104105202A (en) | 2014-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9706542B2 (en) | Methods for transmitting and receiving control channel, base station, and user equipment | |
| EP3694123B1 (en) | Methods and apparatus for discovery signals for lte advanced | |
| CN107425948B (en) | Reference signal transmission method and device, network equipment and user equipment | |
| EP2696626B1 (en) | Method and apparatus for transmitting and receiving reference signal in wireless communication system | |
| CN102340379B (en) | CSI-RS (Channel Status Information-Reference Signal) transmission method and detection method, and devices of CSI-RS transmission method and detection method | |
| CN104584452B (en) | Reception under rollback situation for the down link data of cooperative multipoint transmission | |
| EP2941066B1 (en) | Method and apparatus for transmitting common signal | |
| CN105723640B (en) | Method and arrangement for configuring CSI measurements | |
| EP2560449B1 (en) | Method and device for sending sounding reference signals in multi-antenna system | |
| CN102611524B (en) | Method, system and equipment for information transmission | |
| KR101767021B1 (en) | Mapping method and apparatus for a search space of a physical downlink control channel | |
| EP2779768A1 (en) | Downlink control information transmission method and device | |
| KR20180126048A (en) | Data transmission method, network side device and terminal device | |
| US20160119901A1 (en) | System and method for using synchronization signal for demodulation reference | |
| CN108633047A (en) | A kind of channel transmission method and the network equipment | |
| WO2013138814A1 (en) | Down-sampling of cell-specific reference signals (crs) for a new carrier type (nct) | |
| CN104871581A (en) | Flexible spectrum support in cellular wireless communications | |
| CN109964466B (en) | Parameter set dependent downlink control channel mapping | |
| CN102647790A (en) | Method and device for sending and receiving reference signal | |
| EP2880945B1 (en) | Signaling for epdcch resource mapping in the support of comp | |
| CN104081809A (en) | Wireless communication device, wireless communication method, and wireless communication system | |
| CN107889148B (en) | Method, device, equipment and medium for transmitting and receiving signal and detecting channel transmission | |
| US20130286966A1 (en) | Method of allocating radio resources for control channel and method for receiving the control channel | |
| KR20150029024A (en) | Control information transmission method, base station, and user equipment | |
| CN107689839A (en) | A kind of method for transmitting signals and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Pudong New Area, Pudong Jinqiao Ning Bridge Road, No. 388, No. Applicant after: Shanghai NOKIA Baer Limited by Share Ltd Applicant after: Alcatel Optical Networks Israe Address before: 201206 Shanghai, Pudong Jinqiao Ning Bridge Road, No. 388, No. Applicant before: Shanghai Alcatel-Lucent Co., Ltd. Applicant before: Alcatel Optical Networks Israe |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |