TWI440380B - Resource scheduling method and its equipment - Google Patents

Description

Resource scheduling method and its equipment

The present invention relates to the field of wireless communications, and in particular, to a resource scheduling method and device thereof.

It has been agreed to configure only one semi-persistent scheduling (SPS) grant for the UE in the Long Term Evolution Carrier Aggregation (LTE-CA) scenario. SPS means that in the absence of other downlink (DL) control signals, the UE will use a predetermined resource to perform downlink (DL) reception or uplink (UL) link transmission at a predetermined point in time. However, how to operate SPS licenses in LTE-A-CA is still pending.

Embodiments of the present invention propose a resource scheduling method and apparatus thereof to regulate how to operate an SPS license in an LTE-CA.

According to an aspect of the present invention, a resource scheduling method is provided, including allocating a semi-persistent scheduling (SPS) grant on one or more component carriers; and informing a mobile terminal which component carrier the SPS grant is assigned to, In order to enable the mobile terminal to recognize and use the SPS license.

According to another aspect of the present invention, a scheduling method is provided, comprising: receiving information indicating which component carrier is located in an assigned semi-persistent scheduling (SPS) license; acquiring an assigned SPS license based on the information ; and provide services using the assigned SPS license.

According to still another aspect of the present invention, a base station is provided, comprising: a license allocation unit for allocating a semi-persistent scheduling (SPS) license on one or more component carriers; and a notification unit for notifying the mobile Which component carrier the SPS license assigned by the terminal is located to enable the mobile terminal to recognize and use the SPS license.

According to still another aspect of the present invention, a mobile terminal is provided, comprising: a receiving unit, configured to receive information indicating which component carrier is located in an assigned semi-persistent scheduling (SPS) grant; and an information extracting unit Acquiring the assigned SPS license based on the information; and implementing unit for providing the service by using the allocated SPS license.

According to still another aspect of the present invention, a scheduling system is provided, including the base station and the mobile terminal described above.

According to the technical solution proposed by the embodiment of the present invention, how to operate the SPS license in the LTE-A-CA is standardized, so that semi-persistent scheduling can be performed for the UE in the LTE-A-CA.

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, and the details and functions that are not necessary for the present invention are omitted in the description to avoid confusion of the understanding of the present invention.

Embodiments of the present invention propose a scheduling system. As shown in FIG. 1, the scheduling system includes a mobile terminal (UE) and a base station that schedules resources for the UE. The base station herein may be, but not limited to, an eNB. Although only one base station and two UEs (UE1 and UE2) are shown in FIG. 1, those skilled in the art should know that the scheduling system shown in FIG. 1 is schematic and can be implemented in an actual scheduling system. Includes more base stations and mobile terminals.

Embodiments of the present invention also propose a base station, as shown in FIG. 2, the base station includes a license allocation unit 210 for allocating semi-persistent scheduling (SPS) grants on one or more component carriers; and The unit 220 is configured to notify the mobile terminal of which component carrier the SPS license is allocated to enable the mobile terminal to identify and use the SPS license.

The base station further includes a license generation unit 230 for generating an SPS license indicating the resource allocated for the mobile terminal, and providing the SPS license to the license allocation unit.

The base station further includes a reconfiguration unit 240 for reconfiguring the SPS resources allocated for the mobile terminal; the notification unit 220 is further configured to notify the mobile terminal of the reassigned SPS resources to enable the mobile terminal to replace with the newly configured SPS resources. Original SPS resources.

The base station further includes a temporary coverage unit 250 for specifying a specific transmission time interval or a predetermined time period for the mobile terminal to enable the mobile terminal to use the new SPS resource during the specific transmission time interval or a predetermined time period. The original SPS resource is replaced, and the original SPS resource is returned after the specific transmission time interval or the predetermined time period elapses.

An embodiment of the present invention further provides a mobile terminal. As shown in FIG. 3, the mobile terminal includes a receiving unit 310, configured to receive information indicating which component carrier is located in the allocated semi-persistent scheduling (SPS) permission; The information extracting unit 320 is configured to obtain the allocated SPS license according to the received information, and the resource replacing unit 330 is configured to provide the service by using the allocated SPS license.

The mobile terminal further includes an implementation unit 340, configured to replace the original SPS resource with the new SPS resource in a specific transmission time interval or a predetermined time period when the base station specifies a specific transmission time interval or a predetermined time period. And returning to the original SPS resource after the specific transmission time interval or the predetermined time period elapses.

The mobile terminal further includes a storage unit 350 for storing information used by the mobile terminal in the scheduling process, such as, without limitation, information related to the original SPS resource when temporarily replacing the resource.

Although the base station and the mobile terminal of the embodiment of the present invention are described above in the form of separate functional modules, each of the elements shown in FIGS. 2 and 3 can be implemented by a plurality of devices in practical applications, as shown. Multiple components can also be integrated into a single wafer or a device in practical applications. For example and without limitation, the license generation unit 230 and the reconfiguration unit 240 in the base station can be implemented in the same wafer or device.

The base station described above will be described in detail below with reference to the resource scheduling method shown in FIG.

In step 410, the license allocation unit 210 allocates a semi-persistent scheduling (SPS) grant on one or more component carriers.

1. Assignment of SPS Community Radio Network Temporary Identity (C-RNTI)

Considering that for LTE-A, the grant generation unit 230 allocates only one SPS grant per UE on the UL/DL, naturally, only one SPS C-RNTI is required per UE. Therefore, the license generation unit 230 allocates only one SPS C-RNTI to each UE.

2, SPS license configuration

There are two options for this problem:

Option 1, the license allocation unit 210 allocates SPS grants only on one active component carrier (CC), such as, without limitation, such a CC is a primary component carrier (PCC) that is always active.

Option 2, the license allocation unit 210 can allocate SPS licenses on multiple active CCs. Resources on multiple CCs share the same periodic configuration.

Regardless of which option is selected, the UE must be informed which CC the SPS grant is located on. Therefore, in step 420, the notification unit 220 informs the UE which component carrier the assigned semi-persistent scheduling grant is located in, so that the UE can enable the UE to Identify and use SPS licenses.

In the embodiment of the present invention, the following two options can be used to inform:

Option 1, the notification unit 220 explicitly indicates in the RRC message

Option 2, the notification unit 220 implicitly indicates by the physical downlink control channel (PDCCH) transmission

For option one, the indication of the UL/DL CC may be sent in the RRC message along with other SPS parameters indicating which UL/DL CC the assigned SPS grant is on. The SPS C-RNTI based PDCCH only indicates detailed SPS resource information. In this option, there is no restriction on which DL CC the RRC message and the following PDCCH can be sent.

In option two, the DL CC for PDCCH transmission is used to unambiguously identify the CC to which the SPS grant is to be configured, ie, the PDCCH transmission and the SPS are transmitted on the same DL CC, the configuration method is shown below:

(1) For the case of DL, the DL CC carries the PDCCH and a carrier indication field (CIF).

For example, if no CIF is present, the DL SPS is configured on the same DL CC used for the PDCCH transmission. That is, the SPS C-RNTI based PDCCH must be transmitted on the same DL CC intended for DL SPS configuration.

If CIF is considered, there is no restriction on the transmission of the PDCCH because the CIF in the PDCCH indicates the CC for the SPS grant.

(2) For the UL, similarly, the CIF can be used to indicate the UL CC for the UL SPS license. However, if the CIF is not presented, the indication of the SPS has to be based on the DL CC used to transmit the PDCCH. For example, a UL CC corresponding to a DL CC transmitting the PDCCH transmission may be regarded as a target CC of a UL SPS configuration. However, this is not true for the asymmetry where multiple UL CCs are mapped to the same DL CC. Therefore, for the UL SPS configuration, there is no restriction on PDCCH transmission if based on CIF. The CIF-free case is only used for a symmetric scenario. In a symmetric scenario, the UL CC that is linked with the DL CC that transmits the PDCCH is the target UL CC for SPS grant.

In an embodiment of the present invention, reconfiguration of the SPS license may also be involved, and thus embodiments of the present invention may further include step 430, and the reconfiguration unit 240 reconfigures the SPS license.

This involves the identification of SPS licenses. In an embodiment of the present invention, the information extracting unit 320 of the UE identifies the SPS license as follows:

. If the SPS license is configured on only one CC, then each SPS license and its operation can be identified using the SPS C-RNTI.

. If the SPS license is configured on multiple CCs, the SPS C-RNTI and CIF can be used to identify each SPS on the configured CC.

The UE's implementation unit 330 should perform SPS for all subsequent transmissions based on the new SPS reconfiguration until the next configuration or is temporarily overwritten. This reconfiguration can be due to the following reasons: Go to the CC where the SPS resource is located; The CC where the SPS resource is located is in poor wireless condition; The CC where the SPS resource is located is overloaded.

In the technical solution of the embodiment of the present invention, there are two levels of SPS license reconfiguration:

1. The first stage is the SPS parameter (eg, period) reconfiguration. This is based on the RRC message.

2. The second level is SPS resource reconfiguration, including resource information, MCS, and so on. This is done using the SPS C-RNTI based PDCCH. This resource reconfiguration can be done on any CC or on the same CC as its previous CC.

If the SPS grant is configured on only one CC, then the SPS C-RNTI is sufficient to identify the SPS grant and the SPS C-RNTI is used to locate the resources to be reconfigured.

In an embodiment of the present invention, the reconfiguration unit 240 can be used. A resource indication on the PDCCH to locate a new resource used to replace the original SPS resource. That is, the DL CC and CIF for the PDCCH (if present) are used to locate the new resource as follows: If the reconfiguration is on the currently used CC, for the SPS C-RNTI based PDCCH, two options can be used: Option 1: The PDCCH without CIF is transmitted using the configured current DL SPS (for the case of DL) or using the DL CC (for the case of UL) mapped to the configured current UL SPS.

Option 2: A CIF-based solution where the CIF can indicate the current SPS configuration. Then, there is no restriction on PDCCH transmission.

Similarly, for reconfiguration in other CCs, the following two options are also available:

Option 1: If there is no CIF, the DL CC for PDCCH transmission is taken as the target CC for the new DL SPS, and the UL CC to which it is mapped is the target CC for the new UL SPS.

Option 2: The target CC for the new SPS grant is located based on the CIF, so there is no limit to the PDCCH transmission.

On the other hand, if SPS licenses are configured on multiple CCs, the following two options can be used to configure SPS resources for each of these CCs.

Option one:

In one embodiment, SPS C-RNTI and DL CC for PDCCH transmission are used to locate SPS resources to be reconfigured.

. Sending based on SPS C-RNTI on DL CC (for DL case) with DL SPS grant to be reconfigured or DL CC (for UL case) paired with UL SPS to be reconfigured PDCCH.

‧ Reconfigure the SPS resources on the DL CC (for DL) or the paired UL CC (for UL).

In another embodiment, the resources indicated in the PDCCH including the CIF are used to identify the new resource.

In other embodiments, SPS resources may also be reconfigured to any other CC.

Option two:

The technical solution for Option 2 is as follows:

1. Use SPS C-RNTI and CIF to locate SPS resources that will be reconfigured.

2. The resource indicated in the PDCCH is a new resource.

3. The SPS C-RNTI based PDCCH can be sent on any DL CC.

4. The SPS resources can only be reconfigured on the DL CC used for PDCCH transmission.

In some embodiments of the invention, step 440 may also be included to temporarily cover the SPS permissions. It should be noted here that steps 430 and 440 are optional, and whether or not they are executed and the order of execution is independent of the step number.

In the temporary coverage of the SPS grant, the resource replacement unit 340 of the UE will replace the original SPS resource with the new resource only in a specific transmission time interval (TTI) or a predetermined time period. That is, new resources are only valid at one TTI or at a predetermined time. After this TTI or predetermined time, the UE should return to its original SPS resource. Information related to the replaced original SPS resource may be stored in the storage unit 350 of the UE. The above specific transmission time interval (TTI) or predetermined time period is specified by the temporary coverage unit 250 of the base station to the mobile terminal. There are also two options that are overlaid on the same CC or on different CCs, which will affect the PDCCH transmission.

In an embodiment of the present invention, the temporary coverage SPS may be preset to permit one TTI, or the user equipment may be informed by other signals of the specific transmission time interval (TTI) or the length of the predetermined time period.

For coverage on the same CC, the following two options are possible:

Option 1: The C-RNTI based PDCCH is transmitted using a DL CC with the configured current SPS or a UL CC corresponding to the configured UL CC of the current SPS. The UE should use the new resources indicated on the PDCCH. No CIF is required for this option.

Option 2: The C-RNTI based PDCCH may be transmitted on any DL CC in the presence of a CIF to indicate a CC with the configured SPS. Thus, the UE should use the new resources in the PDCCH to replace the configured SPS grants.

However, if it is desired to temporarily change the SPS resources to a new CC, for example, for higher frequency diversity gain and scheduling flexibility, the PDCCH should be transmitted based on the following considerations.

The PDCCH is transmitted on the DL CC with the configured SPS or on the DL CC paired with the UL CC with the configured SPS, and the CIF is used to locate the target CC for the new resource.

The PDCCH without CIF cannot be used on other DL CCs for this purpose because the UE cannot know whether this is a normal DL/UL grant or a license to replace the SPS resource.

Therefore, if it is desired to temporarily cover the SPS grant to a different CC, the C-RNTI based PDCCH must be sent in the same DL CC as used by the configured current SPS grant, and the CIF must be presented to indicate for new The target CC of the resource. However, this may result in a conflict with pre-scheduled transmissions on the target CC. For example, at the time slot of the configured SPS, non-adaptive HARQ transmission will occur on the target CC. However, as SPS resources change to the CC, it will lead to conflicts. In an embodiment of the invention, the pre-scheduled transmission is discarded and instead the SPS transmission is performed based on the new resource.

The operation on the UE side will be described in detail below in conjunction with the resource scheduling method shown in FIG. 5.

In step 510, the receiving unit 310 of the UE receives information indicating which component carrier is located in the assigned semi-persistent scheduling (SPS) grant. As described above, the information may be sent in an RRC message or may be sent through the PDCCH.

In step 520, the information extracting unit 320 of the UE acquires the assigned SPS license based on the received information.

If the SPS license is configured on only one CC, the UE can identify each SPS license and its operation using the SPS C-RNTI, and thereby obtain the SPS license.

If the SPS grant is configured on multiple CCs, the UE may use the SPS C-RNTI and CIF to identify the source of each SPS on the configured CC and obtain the SPS license.

In step 530, the UE's implementation unit 330 utilizes the obtained SPS permissions for resource scheduling to provide services.

In the scenario of the CA, it is possible for the UE to have multiple allocations (for the case of DL) or permissions (for the case of UL), the license including the license for SPS resources and other resources. There are two options for how to use resources: first, specific resources are used to provide services for specific services, such as VOIP services. If there are additional resources left, other services can be served based on the LCP process. Accordingly, specific PHY parameters (eg, HARQ transmission numbers, etc.) can be set to be adaptive to the QOS requirements of a particular service.

According to the LCP process, there is no difference between SPS resources and other resources.

Through the above technical solutions, those skilled in the art can easily implement SPS scheduling in the LTE-CA environment.

Those skilled in the art will readily recognize that the various steps of the above methods can be implemented by programming a computer. Herein, some embodiments also include a machine readable or computer readable program storage device (eg, a digital data storage medium) and an encoded machine executable or computer executable program instructions, wherein the instructions perform some of the above methods or All steps. For example, the program storage device can be a digital memory, a magnetic storage medium (such as a magnetic disk and a magnetic tape), a hardware or an optically readable digital data storage medium. Embodiments also include a programming computer that performs this step of the above method.

The description and drawings merely illustrate the principles of the invention. It will be appreciated that those skilled in the art are able to devise various structures, and the various structures are not described or illustrated herein, but are intended to be within the spirit and scope of the invention. In addition, all of the examples mentioned herein are explicitly used primarily for teaching purposes to assist the reader in understanding the principles of the present invention and the concepts promoted by the inventors, and should be construed as not to the specific examples. And conditional restrictions. Moreover, all statements herein reciting principles, aspects, and embodiments of the invention, as well as the specific examples thereof,

The above description is only used to implement the embodiments of the present invention, and those skilled in the art should understand that any modification or partial substitution without departing from the scope of the present invention should fall within the scope defined by the scope of the present invention. The scope of protection of the present invention should be based on the scope of protection of the scope of the patent application.

210. . . License allocation unit

220. . . Notification unit

230. . . License generation unit

240. . . Reconfiguration unit

250. . . Temporary coverage unit

310. . . Receiving unit

320. . . Information extraction unit

330. . . Resource replacement unit

340. . . Implementation unit

350. . . Storage unit

The advantages of the present invention will become readily apparent from the following description in conjunction with the accompanying drawings in which:

Figure 1 shows a schematic diagram of a scheduling system in accordance with an embodiment of the present invention;

2 shows a schematic block diagram of a base station in accordance with an embodiment of the present invention;

FIG. 3 shows a schematic block diagram of a mobile terminal according to an embodiment of the present invention; FIG.

4 is a schematic flowchart of a resource scheduling method on a base station side according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart of a resource scheduling method on a mobile terminal side according to an embodiment of the present invention.

210. . . License allocation unit

220. . . Notification unit

230. . . License generation unit

240. . . Reconfiguration unit

250. . . Temporary coverage unit

Claims (22)

A resource scheduling method includes: allocating a semi-persistent scheduling (SPS) grant on one or more component carriers; informing a mobile terminal of which component carrier (CC) the SPS grant is allocated to enable the mobile terminal to enable Identify and use the SPS license. The method of claim 1, further comprising assigning each UE a SPS Community Radio Network Temporary Identification Word (C-RNTI). The method of claim 1, wherein the informing the mobile terminal of the SPS grant to which the component carrier is located comprises: explicitly indicating by the radio resource control (RRC) message or the physical downlink control channel (PDCCH) The transmission implicitly indicates which component carrier the assigned SPS grant is located on. The method of claim 3, wherein when the indication is transmitted through the RRC message, indicating in the RRC message, on which uplink/downlink component carrier the allocated SPS permission is sent, based on the SPS community wireless network The PDCCH of the temporary identification word indicates detailed SPS resource information. The method according to claim 3, wherein, when the PDCCH message is indicated, if the PDCCH includes a carrier indication field (CIF), the CIF is used to indicate which uplink of the allocated SPS permission is in/ Downstream component carrier, otherwise Transmitting an SPS C-RNTI-based PDCCH signal using a downlink control channel of a destination downlink carrier of the downlink SPS grant, so that the mobile terminal can find the SPS-licensed destination downlink component carrier; and transmitting and transmitting the SPS C-RNTI-based PDCCH signal The uplink component carrier corresponding to the downlink component carrier is regarded as the target component carrier for the uplink SPS. The method of any one of claims 1 to 5, further comprising: replacing the original SPS parameter with a new SPS parameter or replacing the original SPS resource with a new SPS resource to reconfigure the SPS license. The method of claim 6, wherein if the SPS license is configured on only one CC, the method further includes: on the DL CC of the original SPS license configuration, or in the UL CC where the original UL SPS license is located Transmitting an PDCCH based on the SPS C-RNTI on the corresponding DL CC; or transmitting the PDCCH on any DL CC, and using the CIF to indicate the DL CC where the original DL SPS is licensed or the UL CC where the original UL SPS is licensed, so that the mobile terminal It is possible to replace the original SPS resource with a new resource on the DL CC where the original DL SPS license is located or the DL CC corresponding to the UL CC where the original UL SPS license is located. The method of claim 6, wherein if the SPS license is configured on only one CC, the method further includes: permitting the DL CC where the original DL SPS is licensed or with the original UL SPS Transmitting a PDCCH based on the SPS C-RNTI on the DL CC corresponding to the UL CC, and using the CIF to indicate the target CC where the new SPS license is located; or transmitting the PDCCH on any DL CC, and using the CIF to indicate the original DL SPS license is located DL CC or UL CC where the original UL SPS license is located; the DL CC where the PDCCH is located as the target CC of the new DL SPS grant, or the UL CC corresponding to the DL CC transmitting the PDCCH as the target of the new UL SPS license CC. The method of claim 6, wherein if the SPS license is configured on the plurality of CCs, the method further comprises: corresponding to the DL CC where the original DL SPS license is located or corresponding to the UL CC where the original UL SPS license is located Transmitting an SPS C-RNTI-based PDCCH on the DL CC; and reconfiguring the SPS resource on the DL CC or the UL CC paired with the DL CC; or using the SPS C-RNTI and DL CC for PDCCH transmission The SPS resource to be reconfigured is located, wherein the resource indicated in the PDCCH is a new SPS resource. The method of any one of claims 1 to 5, further comprising: replacing the original SPS resource with a new SPS resource during a specific transmission time interval or a predetermined time period; The original SPS resource is returned after the specific transmission time interval or the predetermined time period elapses. The method of claim 10, wherein if the SPS license is configured on only one CC, the method further comprises: on the DL CC of the original SPS license configuration, or on the UL CC where the original UL SPS license is located Transmitting a C-RNTI-based PDCCH on the corresponding DL CC; or transmitting the PDCCH on any DL CC, and using the CIF to indicate the DL CC where the original DL SPS is licensed or the UL CC where the original UL SPS is licensed, so that the mobile terminal can The original SPS resource is replaced with a new resource on the DL CC where the original DL SPS license is located or the DL CC corresponding to the UL CC where the original UL SPS is licensed. The method of claim 10, wherein if the SPS license is configured on only one CC, the method further comprises: a DL CC where the original DL SPS license is located or a DL corresponding to the UL CC where the original UL SPS license is located Transmitting a C-RNTI-based PDCCH on the CC, and using the CIF to indicate the target CC where the new SPS license is located; or transmitting the PDCCH on any DL CC, and using the CIF to indicate the DL CC or the original UL SPS license where the original DL SPS license is located The UL CC where the PDCCH is located; the DL CC where the PDCCH is located is the target CC of the new DL SPS grant, or the UL CC corresponding to the DL CC transmitting the PDCCH is The target CC of the new UL SPS license. The method of claim 10, wherein if the SPS license is configured on the plurality of CCs, the method further comprises: corresponding to the DL CC where the original DL SPS license is located or corresponding to the UL CC where the original UL SPS license is located Transmitting a C-RNTI-based PDCCH on the DL CC; and reconfiguring the DL CC or SPS resources on the UL CC paired with the DL CC; or using SPS C-RNTI and DL CC for PDCCH transmission The SPS resource to be reconfigured is located, wherein the resource indicated in the PDCCH is a new SPS resource. A scheduling method includes: receiving information indicating which component carrier is located in an assigned semi-persistent scheduling (SPS) license; acquiring an assigned SPS license based on the information; and providing a service using the allocated SPS license. The method of claim 14, wherein: if the allocated SPS resource is configured on one component carrier, the SPS C-RNTI is used to identify the SPS license and its operation, or if the assigned SPS license is Configured on multiple component carriers, SPS C-RNTI and CIF are used to identify each SPS grant and its operation. According to the method described in claim 14 or 15, Providing the service with the allocated SPS license includes: using the allocated SPS license for a specific service; if there are additional resources left, the additional resource is used for other services. A base station includes: a grant allocation unit for allocating a semi-persistent scheduling (SPS) grant on one or more component carriers; and a notifying unit for notifying a mobile terminal of which component carrier the SPS grant is assigned to So that the mobile terminal can recognize and use the SPS license. The base station according to claim 17, further comprising: a reconfiguration unit, configured to reconfigure SPS resources allocated for the mobile terminal; the notification unit is further configured to notify the mobile terminal to re-allocate the SPS resources to enable The mobile terminal can be replaced. The base station according to claim 17, further comprising: a temporary coverage unit, configured to specify a specific transmission time interval or a predetermined time period for the mobile terminal, so that the mobile terminal is at the specific transmission time interval or The original SPS resource is replaced with a new SPS resource within a predetermined period of time, and the original SPS resource is returned after the specific transmission time interval or a predetermined time period elapses. A mobile terminal comprising: a receiving unit, configured to receive information indicating which component carrier is located in an assigned semi-persistent scheduling (SPS) grant; An information extracting unit, configured to acquire the allocated SPS license according to the information; and an implementing unit, configured to provide a service by using the allocated SPS license scheduling resource. The mobile terminal according to claim 20, further comprising: a resource replacement unit, configured to: when the base station specifies a specific transmission time interval or a predetermined time period, at the specific transmission time interval or a predetermined time The original SPS resource is replaced by the new SPS resource in the segment, and the original SPS resource is returned after the specific transmission time interval or the predetermined time period elapses. A scheduling system comprising the base station according to any one of claims 17 to 19 and the mobile terminal according to claim 20 or 21.