CN111328150A - Scheduling method and device in wireless communication - Google Patents
Scheduling method and device in wireless communication Download PDFInfo
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- CN111328150A CN111328150A CN202010078507.4A CN202010078507A CN111328150A CN 111328150 A CN111328150 A CN 111328150A CN 202010078507 A CN202010078507 A CN 202010078507A CN 111328150 A CN111328150 A CN 111328150A
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- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H04W72/12—Wireless traffic scheduling
- H04W72/121—Wireless traffic scheduling for groups of terminals or users
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Abstract
The invention discloses a scheduling method and a scheduling device in wireless communication. The base station first sends a first signaling indicating a first set of frequency domain resources. A second signaling is then sent, the second signaling scheduling data transmission on the target time-frequency resource. And then sending downlink data on the target time frequency resource, wherein the downlink data is scheduled by a second signaling, or receiving uplink data on the target time frequency resource, wherein the uplink data is scheduled by the second signaling. Wherein the first signaling is higher layer signaling. The second signaling indicates a target frequency domain resource from the first set of frequency domain resources, where the target frequency domain resource is a frequency domain resource occupied by the target time frequency resource in a target time window. The target time window is the first time window occupied by the target time frequency resource in the time domain. The invention reduces the expense of dispatching signaling or dispatches more UE under the condition of the same expense, and is particularly suitable for the characteristics of large quantity of UE and small data volume in a narrow-band communication system.
Description
The present application is a divisional application of the following original applications:
application date of the original application: 24 days 12 months in 2015
- -application number of the original application: 201510991379.1
The invention of the original application is named: scheduling method and device in wireless communication
Technical Field
The present invention relates to a transmission scheme in a wireless communication system, and more particularly, to a method and apparatus for scheduling signaling and resource mapping of a data channel for narrowband communication over a cellular network.
Background
The subject of NB-IOT (narrow band Internet of Things) at 3GPP (3rd Generation Partner Project) RAN (radio Access Network) #69 times congress is set forth by 3GPP as a new Work Item of Release 13 and discussed at RAN1#89bis meetings. The technology provides improved indoor coverage, and realizes the work of supporting a large number of user equipment with the characteristics of low communication traffic, low delay sensitivity, ultralow equipment cost, low equipment power consumption and the like through an optimized network architecture. At present, the technology is discussed in three scenes, which are respectively as follows:
1. stand-alone operation (Stand-alone operation), i.e. occupying the bandwidth of the current GERAN (GSM EDGE radio access Network, GSM/EDGE wireless Communication Network) System for narrowband Communication, to replace one or more GSM (Global System for Mobile Communication) carriers at present.
2. Guard band operation (Guard band operation), namely, the unused resource blocks in the Guard band part of the carrier of the 3GPP LTE (Long-term evolution) system are utilized for narrowband communication.
3. In-band operation (In-band operation), i.e., utilizing resource blocks In the carrier of the normal LTE system for narrowband communication.
3GPP RAN1#83 conference, NB-IOT system introduced Single-tone (Single frequency) transmission and Multi-tone (Multi frequency) transmission mechanism. Single-tone means that the UE transmits on only one subcarrier when transmitting uplink. The Multi-tone transmission follows the current LTE (Long Term Evolution) uplink SC-FDMA (single carrier-Frequency Division Multiple Access) transmission scheme, i.e., transmission is performed on Multiple subcarriers. Uplink transmission can adopt Single-tone or Multi-tone, and in the case of Single-tone, the subcarrier spacing of uplink transmission can be 3.75kHz or 15 kHz. The downlink transmission defines only a subcarrier spacing of 15 kHz. One benefit of single frequency transmission is that the UE radio frequency is simple to implement, there is no PAPR (Peak to Average Power Ratio) problem in uplink, the implementation cost is low, and the Power consumption can be kept low, so as to improve the available time of the terminal battery.
In the LTE system, one system bandwidth is composed of a plurality of PRB (Physical Resource Block) pairs, and one PRB pair includes two PRBs and is located in slot 0 and slot 1 of one LTE subframe respectively. In the data transmission of the LTE system, the minimum scheduling unit is one PRB pair, whether PDSCH (Physical Downlink Shared Channel) or PUSCH (Physical Uplink Shared Channel).
After introducing the NB-IOT technology, especially the single frequency transmission mode, the minimum unit of scheduling needs to be considered again.
Disclosure of Invention
The inventor finds that, in narrowband communication, one problem to be studied is to support smaller scheduling granularity (granularity) to adapt to the characteristic that NB-IOT technology has a small data volume and serves more UEs at the same time. A direct method is to change the minimum unit of data transmission scheduling from one PRB pair to one subcarrier, and therefore, an IE (Information Element) of an original DCI (Downlink Control Indication) Format for Enhanced Machine Type Communication (eMTC) data scheduling needs to be added to an Indication of the subcarrier.
The inventor has found through research that the indication of directly introducing the sub-carriers brings two problems:
the first problem is that a PRB pair contains 12 subcarriers, and 12-bit IEs are needed to completely indicate that the subcarriers in the 12 subcarriers are scheduled, which greatly increases redundancy of system control signaling and brings huge control signaling overhead to the NB-IOT system.
The second problem, because the RF (Radio Frequency) capability of an NB-IOT user is only 180kHz at maximum. Thus, if all three users need to occupy 120kHz resources, they can only be scheduled on three different PRB pairs, and cannot share 2 PRB pairs, as described above. Since a 12-bit subcarrier indication can only be valid in one PRB, it cannot span different PRBs.
In view of the above problems, the present invention provides a corresponding solution. It should be noted that, without conflict, the embodiments and features in the embodiments in the UE (User Equipment) of the present application may be applied to the base station, and vice versa. Further, the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict.
The invention discloses a method in a base station supporting narrow-band wireless communication, which comprises the following steps:
-step a. transmitting first signalling, the first signalling indicating a first set of frequency domain resources.
-step b. sending a second signaling, the second signaling scheduling data transmission on the target time-frequency resource.
Step c. transmitting downlink data on the target time frequency resource and the downlink data is scheduled by the second signaling, or receiving uplink data on the target time frequency resource and the uplink data is scheduled by the second signaling.
Wherein the first signaling is higher layer signaling. The second signaling is physical layer signaling or the second signaling is higher layer signaling. The second signaling indicates a target frequency domain resource from a first frequency domain resource set, the target frequency domain resource is a frequency domain resource occupied by the target time frequency resource in a target time window, and the first frequency domain resource comprises N basic frequency domain units. The N is a positive integer, and the frequency band occupied by the basic frequency domain unit does not exceed 180 kHz. The target time window is the first time window occupied by the target time frequency resource in the time domain. The target time frequency resource occupies L time windows in the time domain. L is a positive integer.
In the above method, the second signaling indicates the target frequency domain resource from the first set of frequency domain resources, thereby reducing the redundant Overhead (Overhead) of the second signaling. Furthermore, considering that the RF capability of the UE is likely to only support a bandwidth of one basic frequency domain unit, the method enables the UE to perform channel estimation only in the first frequency domain resource set in a time division manner, thereby avoiding the UE from performing channel estimation on the broadband resource and improving the performance of channel estimation.
As an embodiment, the basic frequency domain unit corresponds to a bandwidth of one PRB.
As an embodiment, the basic frequency domain unit corresponds to a bandwidth of one subcarrier.
As a sub-embodiment of this embodiment, the bandwidth of the one sub-carrier is one of {3.75kHz, 15kHz }.
As an embodiment, L is greater than 1, and frequency domain resources occupied by the target time-frequency resource in adjacent time windows are different.
As an embodiment, L is greater than 1, and frequency domain resources occupied by the target time-frequency resource in different time windows are the same.
As an example, L is equal to 1.
As an embodiment, the first set of frequency domain resources is used for downlink transmission, and the length of the time window is 1 ms.
As an embodiment, the first set of frequency domain resources is for uplink transmission, and the length of the time window is one of {4ms,6ms }.
As an embodiment, the first signaling is RRC (Radio Resource Control) specific signaling.
As an embodiment, the first signaling is RRC common signaling.
As an embodiment, the second signaling is physical layer signaling.
As an embodiment, the N basic frequency domain units are contiguous in the frequency domain.
As one embodiment, the N fundamental frequency domain units are discrete in the frequency domain.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
step A0. sends a third signaling indicating the second set of frequency domain resources.
Wherein the second set of frequency domain resources comprises Q basic frequency domain units. Q is a positive integer, and Q is greater than or equal to N. The frequency domain resources occupied by the first set of frequency domain resources are a subset of the frequency domain resources occupied by the second set of frequency domain resources.
As an embodiment, the third signaling is system information.
As an embodiment, the Q fundamental frequency domain units are contiguous in the frequency domain.
As one embodiment, the Q fundamental frequency domain units are discrete in the frequency domain.
Specifically, according to an aspect of the present invention, the target time-frequency resource occupies K consecutive subcarriers within the target time window. K is a positive integer no greater than 12.
The second signaling indicates one of:
-a first subcarrier and said K
-a second subcarrier and said K
-a first subcarrier and a second subcarrier
The first subcarrier is a subcarrier with the lowest center frequency among subcarriers included in the target frequency domain resource, and the second subcarrier is a subcarrier with the highest center frequency among subcarriers included in the target frequency domain resource.
As one embodiment, K is equal to 1 and the second signaling contains only the first subcarrier.
As an embodiment, the K consecutive subcarriers belong to one basic frequency domain unit, and a frequency band occupied by the basic frequency domain unit is 180 kHz.
As an embodiment, the K consecutive subcarriers belong to two frequency-domain consecutive basic frequency-domain units, and a frequency band occupied by the basic frequency-domain units is 180kHz, and a frequency band occupied by the K consecutive subcarriers is not greater than 180 kHz.
As an embodiment, the second signaling is further used to indicate the number L1 of the time window occupied by one transmission of the data channel carried by the target time-frequency resource. Wherein L1 is a positive integer and L is divisible by L1. The data channels are non-repeating over the L1 time windows.
In particular, according to one aspect of the invention, it is characterized in that the first signaling indicates the first set of frequency domain resources from among the second set of frequency domain resources.
As an embodiment, the indexes of the N basic frequency domain units occupied by the first frequency domain resource set in the Q basic frequency domain units occupied by the second frequency domain resource set are consecutive.
As an embodiment, the indexes of the N basic frequency domain units occupied by the first frequency domain resource set in the Q basic frequency domain units occupied by the second frequency domain resource set are discrete.
Specifically, according to one aspect of the present invention, it is characterized in that the second signaling indicates the first subcarrier and the second signaling indicates the first subcarrier from the N basic frequency domain units; or the second signaling indicates the second subcarrier and the second signaling indicates the second subcarrier from the N basic frequency domain units.
As one embodiment, the basic frequency domain unit includes S subcarriers. The second signaling is used for indicating that the information bit number of the K subcarriers is equal to R. R is a positive integer and is equal to
One of (1). Wherein the content of the first and second substances,
represents a positive integer not greater than W + 1.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
-a step a1. sending a fourth signaling, the fourth signaling indicating a third set of frequency domain resources.
And the frequency domain resources occupied by the third frequency domain resource set do not exceed 180kHz, and the second signaling is transmitted in the third frequency domain resource set.
As an embodiment, the frequency domain resources occupied by the third frequency domain resource set include D basic frequency domain units. D is a positive integer.
As a sub-embodiment of this embodiment, the fourth signaling is a synchronization sequence, and D is equal to 1. The fourth signaling indicates that the third frequency domain resource set is a basic frequency domain unit with the same occupation of the fourth signaling and the third frequency domain resource, and the UE determines the frequency domain position of the third frequency domain resource by detecting the fourth signaling.
As a sub-embodiment of this embodiment, the fourth signaling is one of { broadcast signaling, RRC dedicated signaling }.
As a sub-embodiment of this embodiment, the D basic frequency domain units are contiguous in the frequency domain.
As a sub-embodiment of this embodiment, the D fundamental frequency domain units are discrete in the frequency domain.
In particular, according to an aspect of the invention, it is characterized in that the fourth signaling indicates the third set of frequency domain resources from among the second set of frequency domain resources.
As an embodiment, the indexes of the D basic frequency domain units occupied by the third frequency domain resource set in the Q basic frequency domain units occupied by the second frequency domain resource set are continuous.
As an embodiment, the indexes of the D basic frequency domain units occupied by the third frequency domain resource set in the Q basic frequency domain units occupied by the second frequency domain resource set are discrete.
One peculiarity of the invention lies in that the first frequency domain resource set is indicated by the first signaling, and the time frequency resource position occupied by the data scheduled to the UE is further indicated in the first frequency domain resource set by the dynamic scheduling signaling of the UE, namely the second signaling. Therefore, downlink and uplink data scheduling can be realized by using fewer DCI information bits, and the redundancy of system control signaling is reduced. Meanwhile, because the RF capability of the NB-IOT UE is limited, the scheduling flexibility does not need to cover the whole system bandwidth, therefore, the first signaling is sent by adopting the high-level signaling, the scheduling characteristic of the NB-IOT UE can be well adapted, and the performance can not be influenced. On the other hand, the minimum scheduling granularity in the second signaling is a subcarrier instead of the traditional PRB, so that the base station is ensured to schedule more users on limited resources in a time window, the characteristics of multiple users and small data volume of NB-IOT service can be better adapted, and the overall spectrum efficiency of the system is improved.
At the same time, another peculiarity of the invention consists in indicating in the second set of frequency domain resources the first set of frequency domain resources in which the target time frequency resources are indicated. The indication based on the subset instead of the system frequency band can greatly reduce signaling overhead, particularly dynamic signaling overhead, and improve the overall spectrum efficiency of the system.
The invention discloses a method in UE supporting narrow-band communication, which comprises the following steps:
-step a. receiving first signalling, the first signalling indicating a first set of frequency domain resources.
-step b. receiving a second signaling, the second signaling scheduling data transmission on the target time-frequency resource.
And C, receiving downlink data on the target time frequency resource according to the scheduling of the second signaling, or sending uplink data on the target time frequency resource according to the scheduling of the second signaling.
Wherein the first signaling is higher layer signaling. The second signaling is physical layer signaling or the second signaling is higher layer signaling. The second signaling indicates a target frequency domain resource from a first frequency domain resource set, the target frequency domain resource is a frequency domain resource occupied by the target time frequency resource in a target time window, and the first frequency domain resource comprises N basic frequency domain units. The N is a positive integer, and the frequency band occupied by the basic frequency domain unit does not exceed 180 kHz. The target time window is the first time window occupied by the target time frequency resource in the time domain. The target time frequency resource occupies L time windows in the time domain. L is a positive integer.
As an embodiment, the method further includes the steps of:
-step A0. the UE performs channel estimation in the first set of frequency domain resources.
As a sub-embodiment of the above embodiment, the UE can only receive a downlink RS (Reference Signal) in one basic frequency domain unit in one time window, and the downlink RS is used for channel estimation.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
step A0. receives third signaling indicating the second set of frequency domain resources.
Wherein the second set of frequency domain resources comprises Q basic frequency domain units. Q is a positive integer, and Q is greater than or equal to N. The frequency domain resources occupied by the first set of frequency domain resources are a subset of the frequency domain resources occupied by the second set of frequency domain resources.
Specifically, according to an aspect of the present invention, the target time-frequency resource occupies K consecutive subcarriers within the target time window. K is a positive integer no greater than 12.
The second signaling indicates one of:
-a first subcarrier and said K
-a second subcarrier and said K
-a first subcarrier and a second subcarrier
The first subcarrier is a subcarrier with the lowest center frequency among subcarriers included in the target frequency domain resource, and the second subcarrier is a subcarrier with the highest center frequency among subcarriers included in the target frequency domain resource. In particular, according to one aspect of the invention, it is characterized in that the first signaling indicates the first set of frequency domain resources from among the second set of frequency domain resources.
In particular, according to one aspect of the invention, it is characterized in that the first signaling indicates the first set of frequency domain resources from the second set of frequency domain resources.
Specifically, according to one aspect of the present invention, it is characterized in that the second signaling indicates the first subcarrier and the second signaling indicates the first subcarrier from the N basic frequency domain units; or the second signaling indicates the second subcarrier and the second signaling indicates the second subcarrier from the N basic frequency domain units.
Specifically, the step a is characterized by further comprising the following steps:
step a1. receiving a fourth signaling, the fourth signaling indicating a third set of frequency domain resources.
And the frequency domain resources occupied by the third frequency domain resource set in the third time window are not more than 180kHz, and the second signaling is transmitted in the third frequency domain resource set.
As an embodiment, the UE detects the second signaling in the third set of resources.
The invention discloses a base station device supporting narrow-band wireless communication, which is characterized by comprising:
-a first module: for transmitting first signaling, the first signaling indicating a first set of frequency domain resources; and for transmitting third signaling, the third signaling indicating a second set of frequency domain resources; and means for transmitting fourth signaling, the fourth signaling indicating the third set of frequency domain resources.
-a second module: for sending a second signaling, which schedules data transmission on the target time-frequency resource.
-a third module: and the first signaling is used for sending downlink data on the target time frequency resource, and the downlink data is scheduled by the second signaling, or the second signaling is used for receiving uplink data on the target time frequency resource, and the uplink data is scheduled by the second signaling.
Wherein the first signaling is higher layer signaling. The second signaling is physical layer signaling or the second signaling is higher layer signaling. The second signaling indicates a target frequency domain resource from a first frequency domain resource set, the target frequency domain resource is a frequency domain resource occupied by the target time frequency resource in a target time window, and the first frequency domain resource comprises N basic frequency domain units. The N is a positive integer, and the frequency band occupied by the basic frequency domain unit does not exceed 180 kHz. The target time window is the first time window occupied by the target time frequency resource in the time domain. The target time frequency resource occupies L time windows in the time domain. L is a positive integer. The second set of frequency domain resources comprises Q basic frequency domain units. Q is a positive integer, and Q is greater than or equal to N. The frequency domain resources occupied by the first set of frequency domain resources are a subset of the frequency domain resources occupied by the second set of frequency domain resources. The frequency domain resources occupied by the third frequency domain resource set do not exceed 180kHz, and the second signaling is transmitted in the third frequency domain resource set.
Specifically, according to an aspect of the present invention, the target time-frequency resource occupies K consecutive subcarriers within the target time window. K is a positive integer no greater than 12.
The second signaling indicates one of:
-a first subcarrier and said K
-a second subcarrier and said K
-a first subcarrier and a second subcarrier
The first subcarrier is a subcarrier with the lowest center frequency among subcarriers included in the target frequency domain resource, and the second subcarrier is a subcarrier with the highest center frequency among subcarriers included in the target frequency domain resource.
The invention discloses a user equipment supporting narrow-band wireless communication, which is characterized by comprising:
-a first module: for receiving first signaling, the first signaling indicating a first set of frequency domain resources; and means for receiving third signalling, the third signalling indicating a second set of frequency domain resources; and means for receiving fourth signaling, the fourth signaling indicating a third set of frequency domain resources.
-a second module: for receiving second signaling, the second signaling scheduling data transmission on the target time-frequency resource.
-a third module: and the receiving unit is used for receiving downlink data on the target time-frequency resource according to the scheduling of the second signaling, or is used for sending uplink data on the target time-frequency resource according to the scheduling of the second signaling.
Wherein the first signaling is higher layer signaling. The second signaling is physical layer signaling or the second signaling is higher layer signaling. The second signaling indicates a target frequency domain resource from a first frequency domain resource set, the target frequency domain resource is a frequency domain resource occupied by the target time frequency resource in a target time window, and the first frequency domain resource comprises N basic frequency domain units. The N is a positive integer, and the frequency band occupied by the basic frequency domain unit does not exceed 180 kHz. The target time window is the first time window occupied by the target time frequency resource in the time domain. The target time frequency resource occupies L time windows in the time domain. L is a positive integer. The second set of frequency domain resources comprises Q basic frequency domain units. Q is a positive integer, and Q is greater than or equal to N. The frequency domain resources occupied by the first set of frequency domain resources are a subset of the frequency domain resources occupied by the second set of frequency domain resources. The frequency domain resources occupied by the third frequency domain resource set do not exceed 180kHz, and the second signaling is transmitted in the third frequency domain resource set.
Specifically, according to an aspect of the present invention, the target time-frequency resource occupies K consecutive subcarriers within the target time window. K is a positive integer no greater than 12.
The second signaling indicates one of:
-a first subcarrier and said K
-a second subcarrier and said K
-a first subcarrier and a second subcarrier
The first subcarrier is a subcarrier with the lowest center frequency among subcarriers included in the target frequency domain resource, and the second subcarrier is a subcarrier with the highest center frequency among subcarriers included in the target frequency domain resource.
Compared with the prior art, the invention has the following technical advantages:
indicating a first set of frequency domain resources by a first signaling, and then indicating, by a second signaling, a time-frequency resource location occupied by data scheduled to the UE in the first set of frequency domain resources. And under the condition of not influencing the NB-IOT scheduling performance, the redundancy of control signaling is reduced.
The minimum granularity of scheduling in the second signaling is a subcarrier, instead of the conventional PRB, so that it is ensured that the base station schedules more users on limited resources within a time window, and the method can better adapt to the characteristics of multiple users and small data volume in NB-IOT services, and improve the overall spectrum efficiency of the system.
Indicating a first set of frequency domain resources in the second set of frequency domain resources, indicating target time-frequency resources in the first set of frequency domain resources. The indication based on the subset instead of the system frequency band can greatly reduce signaling overhead, particularly dynamic signaling overhead, and improve the overall spectrum efficiency of the system.
Improving the channel estimation performance.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 shows a flow diagram of the transmission of a first signaling and a second signaling according to one embodiment of the invention;
FIG. 2 shows a flow diagram of upstream data transmission according to one embodiment of the invention;
fig. 3 shows a schematic diagram of frequency domain positions of a positive integer number of basic frequency domain units constituting a given set of frequency domain resources, the given set of frequency domain resources being one of { a first set of frequency domain resources, a second set of frequency domain resources, a third set of frequency domain resources }, according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a resource configuration of a target time-frequency resource according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a resource configuration of a target time-frequency resource according to yet another embodiment of the invention;
FIG. 6 is a diagram illustrating that a target time-frequency resource occupies two basic resource units according to an embodiment of the invention;
fig. 7 shows a block diagram of a processing means in a base station according to an embodiment of the invention;
fig. 8 shows a block diagram of a processing device in a UE according to an embodiment of the invention;
Detailed Description
The technical solutions of the present invention will be further described in detail with reference to the accompanying drawings, and it should be noted that the features of the embodiments and examples of the present application may be arbitrarily combined with each other without conflict.
Example 1
For base station N1, third signaling is sent in step S11, the third signaling indicating a second set of frequency domain resources.
Wherein the second set of frequency domain resources comprises Q basic frequency domain units. Q is a positive integer, and Q is greater than or equal to N. The frequency domain resources occupied by the first set of frequency domain resources are a subset of the frequency domain resources occupied by the second set of frequency domain resources.
For UE U2, third signaling is received in step S21, the third signaling indicating a second set of frequency domain resources.
For base station N1, fourth signaling is sent in step S12, the fourth signaling indicating a third set of frequency domain resources.
And the frequency domain resources occupied by the third frequency domain resource set do not exceed 180kHz, and the second signaling is transmitted in the third frequency domain resource set.
For the UE U2, fourth signaling is received in step S22, the fourth signaling indicating a third set of frequency domain resources.
For base station N1, first signaling is sent in step S13, the first signaling indicating a first set of frequency domain resources.
Wherein the first signaling is higher layer signaling. The frequency domain resources occupied by the first set of frequency domain resources include N basic frequency domain units. The N is a positive integer, and the frequency band occupied by the basic frequency domain unit does not exceed 180 kHz.
For UE U2, first signaling is received in step S23, the first signaling indicating a first set of frequency domain resources.
For base station N1, second signaling is sent in step S14, the second signaling scheduling data transmission on the target time-frequency resource.
Wherein the second signaling is physical layer signaling or the second signaling is higher layer signaling. The second signaling indicates a target frequency domain resource from the first set of frequency domain resources, where the target frequency domain resource is a frequency domain resource occupied by the target time frequency resource in a target time window. The target time window is the first time window occupied by the target time frequency resource in the time domain. The target time frequency resource occupies L time windows in the time domain. L is a positive integer.
For user U2, second signaling is received in step S24, the second signaling scheduling data transmission on the target time-frequency resource.
For the base station N1, downlink data is sent on the target time-frequency resource in step S15 and the downlink data.
For the user U2, downlink data is received on the target time-frequency resource according to the scheduling of the second signaling in step S25.
As a sub-embodiment, the second signaling is DCI (Downlink control information) for scheduling Downlink transmission.
Example 2
Embodiment 2 shows a flowchart of an uplink data transmission according to the present invention; as shown in fig. 2. In fig. 2, base station N3 is the serving cell maintaining base station for UE U4.
For the UE U4, uplink data is transmitted on the target time-frequency resource according to the scheduling of the second signaling in step S41.
For base station N3, uplink data is received on the target time-frequency resource and scheduled by the second signaling in step S31.
As a sub-embodiment, the above steps may replace the optional portion shown in FIG. 1 as F3.
As a sub-embodiment, the second signaling is DCI for scheduling uplink transmission.
Example 3
Embodiment 3 shows a schematic diagram of the frequency domain positions of a positive integer number of basic frequency domain units constituting a given set of frequency domain resources according to the present invention; as shown in fig. 3. Wherein the given set of frequency domain resources is one of { a first set of frequency domain resources, a second set of frequency domain resources, a third set of frequency domain resources };
as shown in fig. 3, a basic frequency domain unit # 1 to a basic frequency domain unit # I are drawn.
As an embodiment, the I basic frequency domain units of the basic frequency domain unit # 1 to the basic frequency domain unit # I constitute a system bandwidth.
As an embodiment, of the basic frequency domain units # 1 to # I, M basic frequency domain units constitute a given set of frequency domain resources. And the frequency domain positions of the M basic frequency domain units are indicated by given signaling. Wherein the given signaling is one of { first signaling, third signaling, fourth signaling }. M is a positive integer.
As a sub-embodiment, M is equal to N, and the given set of frequency domain resources is a first set of frequency domain resources, and the given signaling is a first signaling.
As a sub-embodiment, M is equal to Q, and the given set of frequency domain resources is a second set of frequency domain resources, and the given signaling is a third signaling.
As a sub-embodiment, M is equal to D, and the given set of frequency domain resources is a third set of frequency domain resources, and the given signaling is a fourth signaling.
As a sub-embodiment, N is equal to 1.
As a sub-embodiment, D is equal to 1.
As a sub-embodiment, Q is equal to 1.
As a sub-embodiment, the M basic frequency domain units are contiguous in the frequency domain, and the given signaling includes at least one of:
-a starting frequency point of a lowest frequency basic frequency domain unit of the M basic frequency domain units;
-a starting frequency point of a highest frequency basic frequency domain unit of the M basic frequency domain units;
-an index in the overall system bandwidth of PRBs occupied by the lowest frequency basic frequency domain unit of the M basic frequency domain units;
-an index in the overall system bandwidth of PRBs occupied by the highest frequency basic frequency domain unit of the M basic frequency domain units;
-the value of M;
as a sub-embodiment, the M basic frequency domain units are discrete in the frequency domain, and the given signaling includes at least one of:
-a starting frequency point for an mth of the M basic frequency domain units;
-an index in the overall system bandwidth of PRBs occupied by the mth of the M basic frequency domain units;
wherein M is a positive integer not less than M.
As an embodiment, of the basic frequency domain units # 1 to # I, M basic frequency domain units constitute a given set of frequency domain resources, and Q basic frequency domain units constitute a second set of frequency domain resources. And the frequency domain positions of the M basic frequency domain units are indicated by the given signaling from the second frequency domain resource. Wherein the given signaling is one of { first signaling, fourth signaling }. M is a positive integer.
As a sub-embodiment, M is equal to N, and the given set of frequency domain resources is a first set of frequency domain resources, and the given signaling is a first signaling.
As a sub-embodiment, M is equal to D, and the given set of frequency domain resources is a third set of frequency domain resources, and the given signaling is a fourth signaling.
As a sub-embodiment, the indexes of the M basic frequency domain units in the Q basic frequency domain units are consecutive, and the given signaling includes at least one of:
-an index of a lowest of the M elementary frequency-domain units in the Q elementary frequency-domain units;
-an index of the highest of the M elementary frequency-domain units in the Q elementary frequency-domain units;
-the value of M;
as a sub-embodiment, the indexes of the M basic frequency domain units in the Q basic frequency domain units are discrete, and the given signaling includes at least one of:
-an index of an mth of the M basic frequency domain units in the Q basic frequency domain units;
wherein M is a positive integer not less than M.
Example 4
Embodiment 4 shows a schematic diagram of a resource configuration of a target time-frequency resource according to the present invention; as shown in fig. 4.
As shown in fig. 4, the target time-frequency resources occupy L time windows in the time domain, and the target frequency-domain resources occupied by the target time-frequency resources in the target time window are located on K consecutive subcarriers with fixed frequency-domain positions in the basic frequency-domain unit # n. The frequency domain positions of the frequency domain resources occupied by the target time-frequency resources in the time windows #2 to # L are the same as the frequency domain position of the target frequency domain resource.
Wherein a basic frequency domain unit # N belongs to the first set of frequency domain resources, N being a positive integer no greater than N. The basic frequency domain unit # 1 to the basic frequency domain unit # N in the figure constitute a first set of frequency domain resources.
As an embodiment, the L time windows are consecutive in the time domain.
As an embodiment, the L time windows are discrete in the time domain.
Example 5
Embodiment 5 shows a schematic diagram of a resource configuration of a further target time-frequency resource according to the present invention; as shown in fig. 5.
As shown in fig. 5, the frequency domain resources occupied by the first set of frequency domain resources in adjacent time windows are different. The target time-frequency resource occupies K consecutive subcarriers of basic frequency domain unit # n in time window # i, and the target time-frequency resource occupies K consecutive subcarriers of basic frequency domain unit # m in time window # (i + 1). And a frequency difference between the first center frequency point of K consecutive subcarriers in the basic frequency domain unit # n and the first center frequency point of K consecutive subcarriers in the basic frequency domain unit # m is j (khz).
Wherein i, N and m are positive integers, N is less than m, m is not more than N, and i is not more than L. The time window # i and the time window # (i +1) are subsets of the L time windows occupied by the target time-frequency resource. The basic frequency domain unit # N and the basic frequency domain unit # m are subsets of the N basic frequency domain units occupied by the first frequency domain resource set. The first central frequency point is the central frequency point of the subcarrier with the lowest frequency point in the K continuous subcarriers.
As one example, J is a positive integer multiple of one of {3.75, 15, 180 }.
As an embodiment, J is configured by system information or RRC-specific information.
As one example, J is fixed.
Example 6
Embodiment 6 illustrates a schematic diagram of two basic resource units occupied by a target time-frequency resource according to the present invention; as shown in fig. 6.
As shown in fig. 6, the target time-frequency resource occupies both the frequency-domain resource in the basic frequency-domain unit # n and the frequency-domain resource in the basic frequency-domain unit # (n +1) in the time window # i. Time window # i is a subset of the L time windows occupied by the target time-frequency resource. The basic frequency domain unit # N and the basic frequency domain unit # (N +1) are subsets of the N basic frequency domain units occupied by the first frequency domain resource set, and the basic frequency domain unit # N and the basic frequency domain unit # (N +1) are continuous in the frequency domain. Wherein N is a positive integer less than N, and i is a positive integer no greater than L.
As an embodiment, data transmitted on the target time-frequency resource is demodulated by a cell-specific reference signal.
Example 7
Embodiment 7 shows a block diagram of a processing apparatus in a base station according to the present invention, as shown in fig. 7. In fig. 7, the base station processing apparatus 200 mainly includes a first module 201, a second module 202, and a third module 203.
A first module 201: for transmitting first signaling, the first signaling indicating a first set of frequency domain resources; and for transmitting third signaling, the third signaling indicating a second set of frequency domain resources; and means for transmitting fourth signaling, the fourth signaling indicating the third set of frequency domain resources.
A second module 202: for sending a second signaling, which schedules data transmission on the target time-frequency resource.
-a third module 203: and the first signaling is used for sending downlink data on the target time frequency resource, and the downlink data is scheduled by the second signaling, or the second signaling is used for receiving uplink data on the target time frequency resource, and the uplink data is scheduled by the second signaling.
Wherein the first signaling is higher layer signaling. The second signaling is physical layer signaling or the second signaling is higher layer signaling. The second signaling indicates a target frequency domain resource from a first frequency domain resource set, the target frequency domain resource is a frequency domain resource occupied by the target time frequency resource in a target time window, and the first frequency domain resource comprises N basic frequency domain units. The N is a positive integer, and the frequency band occupied by the basic frequency domain unit does not exceed 180 kHz. The target time window is the first time window occupied by the target time frequency resource in the time domain. The target time frequency resource occupies L time windows in the time domain. L is a positive integer. The second set of frequency domain resources comprises Q basic frequency domain units. Q is a positive integer, and Q is greater than or equal to N. The frequency domain resources occupied by the first set of frequency domain resources are a subset of the frequency domain resources occupied by the second set of frequency domain resources. The frequency domain resources occupied by the third frequency domain resource set do not exceed 180kHz, and the second signaling is transmitted in the third frequency domain resource set.
Example 8
Embodiment 8 shows a block diagram of a processing apparatus in a UE according to the present invention, as shown in fig. 8. In fig. 8, the UE processing apparatus 300 mainly includes a first module 301, a second module 302 and a third module 303.
The first module 301: for receiving first signaling, the first signaling indicating a first set of frequency domain resources; and means for receiving third signalling, the third signalling indicating a second set of frequency domain resources; and means for receiving fourth signaling, the fourth signaling indicating a third set of frequency domain resources.
-a second module 302: for receiving second signaling, the second signaling scheduling data transmission on the target time-frequency resource.
-a third module 303: and the receiving unit is used for receiving downlink data on the target time-frequency resource according to the scheduling of the second signaling, or is used for sending uplink data on the target time-frequency resource according to the scheduling of the second signaling.
Wherein the first signaling is higher layer signaling. The second signaling is physical layer signaling or the second signaling is higher layer signaling. The second signaling indicates a target frequency domain resource from a first frequency domain resource set, the target frequency domain resource is a frequency domain resource occupied by the target time frequency resource in a target time window, and the first frequency domain resource comprises N basic frequency domain units. The N is a positive integer, and the frequency band occupied by the basic frequency domain unit does not exceed 180 kHz. The target time window is the first time window occupied by the target time frequency resource in the time domain. The target time frequency resource occupies L time windows in the time domain. L is a positive integer. The second set of frequency domain resources comprises Q basic frequency domain units. Q is a positive integer, and Q is greater than or equal to N. The frequency domain resources occupied by the first set of frequency domain resources are a subset of the frequency domain resources occupied by the second set of frequency domain resources. The frequency domain resources occupied by the third frequency domain resource set do not exceed 180kHz, and the second signaling is transmitted in the third frequency domain resource set.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE and the terminal in the present invention include, but are not limited to, an RFID, an internet of things terminal device, an MTC (Machine Type Communication) terminal, a vehicle-mounted Communication device, a wireless sensor, an internet card, a mobile phone, a tablet computer, a notebook, and other wireless Communication devices. The base station and the base station device in the present invention include, but are not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (11)
1. A method in a base station supporting narrowband communications, comprising the steps of:
-step a. transmitting first signalling, the first signalling indicating a first set of frequency domain resources;
-step b. sending a second signaling, the second signaling scheduling data transmission on the target time-frequency resource;
-step c. transmitting downlink data on the target time frequency resource and the downlink data is scheduled by the second signaling and the second signaling is downlink control information for scheduling downlink transmission, or receiving uplink data on the target time frequency resource and the uplink data is scheduled by the second signaling and the second signaling is downlink control information for scheduling uplink transmission;
wherein the first signaling is a higher layer signaling; the second signaling is physical layer signaling; the second signaling indicates a target frequency domain resource from the first frequency domain resource set, wherein the target frequency domain resource is a frequency domain resource occupied by the target time frequency resource in a target time window; the first set of frequency domain resources comprises N basic frequency domain units; n is a positive integer, and the frequency band occupied by the basic frequency domain unit does not exceed 180 kHz; the target time window is a first time window occupied by the target time-frequency resource in a time domain; the target time frequency resource occupies L time windows in the time domain; l is a positive integer.
2. The method of claim 1, wherein step a further comprises the steps of:
-step A0. sending a third signaling, the third signaling indicating a second set of frequency domain resources;
wherein the second set of frequency domain resources comprises Q basic frequency domain units; q is a positive integer, said Q being greater than or equal to said N; the frequency domain resources occupied by the first set of frequency domain resources are a subset of the frequency domain resources occupied by the second set of frequency domain resources.
3. The method according to claim 1 or 2, wherein the target time-frequency resource occupies K consecutive subcarriers within the target time window; k is a positive integer no greater than 12; the second signaling indicates one of:
-a first subcarrier and the K;
-a second subcarrier and the K;
-a first subcarrier and a second subcarrier;
the first subcarrier is a subcarrier with the lowest center frequency among subcarriers included in the target frequency domain resource, and the second subcarrier is a subcarrier with the highest center frequency among subcarriers included in the target frequency domain resource.
4. The method of claim 2, wherein the first signaling indicates the first set of frequency domain resources from the second set of frequency domain resources.
5. The method of claim 3, wherein the second signaling indicates the first subcarrier and the second signaling indicates the first subcarrier from the N basic frequency domain units; or the second signaling indicates the second subcarrier and the second signaling indicates the second subcarrier from the N basic frequency domain units.
6. The method according to claim 1 or 2, wherein said step a further comprises the steps of:
a step a1. sending a fourth signaling, the fourth signaling indicating a third set of frequency domain resources;
and the frequency domain resources occupied by the third frequency domain resource set do not exceed 180kHz, and the second signaling is transmitted in the third frequency domain resource set.
7. A method in a UE supporting narrowband communication, comprising:
-step a. receiving first signalling, the first signalling indicating a first set of frequency domain resources;
-step b. receiving a second signaling, the second signaling scheduling data transmission on the target time-frequency resource;
-step c. receiving downlink data on a target time frequency resource according to the scheduling of a second signaling, the second signaling being downlink control information for scheduling downlink transmission, or sending uplink data on a target time frequency resource according to the scheduling of a second signaling, the second signaling being downlink control information for scheduling uplink transmission;
wherein the first signaling is a higher layer signaling; the second signaling is physical layer signaling; the second signaling indicates a target frequency domain resource from the first frequency domain resource set, wherein the target frequency domain resource is a frequency domain resource occupied by the target time frequency resource in a target time window; the first set of frequency domain resources comprises N basic frequency domain units; n is a positive integer, and the frequency band occupied by the basic frequency domain unit does not exceed 180 kHz; the target time window is a first time window occupied by the target time-frequency resource in a time domain; the target time frequency resource occupies L time windows in the time domain; l is a positive integer.
8. A base station apparatus supporting narrowband communication, the apparatus comprising:
-a first module: for transmitting first signaling, the first signaling indicating a first set of frequency domain resources; and for transmitting third signaling, the third signaling indicating a second set of frequency domain resources; and means for sending a fourth signaling, the fourth signaling indicating a third set of frequency domain resources;
-a second module: the system comprises a first signaling and a second signaling, wherein the first signaling is used for sending a first signaling, and the first signaling schedules data transmission on a target time-frequency resource;
-a third module: the downlink control information is used for sending downlink data on a target time frequency resource, the downlink data is scheduled by a second signaling, and the second signaling is downlink control information used for scheduling downlink transmission, or the downlink control information is used for receiving uplink data on the target time frequency resource, the uplink data is scheduled by the second signaling, and the second signaling is downlink control information used for scheduling uplink transmission;
wherein the first signaling is a higher layer signaling; the second signaling is physical layer signaling; the second signaling indicates a target frequency domain resource from the first frequency domain resource set, wherein the target frequency domain resource is a frequency domain resource occupied by the target time frequency resource in a target time window; the first set of frequency domain resources comprises N basic frequency domain units; n is a positive integer, and the frequency band occupied by the basic frequency domain unit does not exceed 180 kHz; the target time window is a first time window occupied by the target time-frequency resource in a time domain; the target time frequency resource occupies L time windows in the time domain; l is a positive integer; the second set of frequency domain resources comprises Q basic frequency domain units; q is a positive integer, said Q being greater than or equal to said N; the frequency domain resources occupied by the first set of frequency domain resources are a subset of the frequency domain resources occupied by the second set of frequency domain resources; the frequency domain resources occupied by the third frequency domain resource set do not exceed 180kHz, and the second signaling is transmitted in the third frequency domain resource set.
9. The apparatus of claim 8, wherein the target time-frequency resource occupies K consecutive subcarriers within the target time window; k is a positive integer no greater than 12; the second signaling indicates one of:
-a first subcarrier and the K;
-a second subcarrier and the K;
-a first subcarrier and a second subcarrier;
the first subcarrier is a subcarrier with the lowest center frequency among subcarriers included in the target frequency domain resource, and the second subcarrier is a subcarrier with the highest center frequency among subcarriers included in the target frequency domain resource.
10. A user equipment supporting narrowband communications, the device comprising:
-a first module: for receiving first signaling, the first signaling indicating a first set of frequency domain resources; and means for receiving third signalling, the third signalling indicating a second set of frequency domain resources; and means for receiving a fourth signaling, the fourth signaling indicating a third set of frequency domain resources;
-a second module: the system comprises a first signaling and a second signaling, wherein the first signaling is used for receiving a first signaling, and the first signaling schedules data transmission on a target time-frequency resource;
-a third module: the system comprises a first signaling and a second signaling, wherein the first signaling is used for receiving downlink data on a target time frequency resource according to the scheduling of the second signaling, and the second signaling is downlink control information used for scheduling downlink transmission, or used for sending uplink data on the target time frequency resource according to the scheduling of the second signaling, and the second signaling is downlink control information used for scheduling uplink transmission;
wherein the first signaling is a higher layer signaling; the second signaling is physical layer signaling; the second signaling indicates target frequency domain resources from a first frequency domain resource set, the target frequency domain resources are frequency domain resources occupied by the target time frequency resources in a target time window, and the first frequency domain resource set comprises N basic frequency domain units; n is a positive integer, and the frequency band occupied by the basic frequency domain unit does not exceed 180 kHz; the target time window is a first time window occupied by the target time-frequency resource in a time domain; the target time frequency resource occupies L time windows in the time domain; l is a positive integer; the second set of frequency domain resources comprises Q basic frequency domain units; q is a positive integer, said Q being greater than or equal to said N; the frequency domain resources occupied by the first set of frequency domain resources are a subset of the frequency domain resources occupied by the second set of frequency domain resources; the frequency domain resources occupied by the third frequency domain resource set do not exceed 180kHz, and the second signaling is transmitted in the third frequency domain resource set.
11. The apparatus of claim 10, wherein the target time-frequency resource occupies K consecutive subcarriers within the target time window; k is a positive integer no greater than 12; the second signaling indicates one of:
-a first subcarrier and the K;
-a second subcarrier and the K;
-a first subcarrier and a second subcarrier;
the first subcarrier is a subcarrier with the lowest center frequency among subcarriers included in the target frequency domain resource, and the second subcarrier is a subcarrier with the highest center frequency among subcarriers included in the target frequency domain resource.
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| CN109756988B (en) * | 2017-11-06 | 2022-03-29 | 上海朗帛通信技术有限公司 | Method and device used in user equipment and base station for wireless communication |
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