WO2012119441A1

WO2012119441A1 - Method, apparatus and system for indicating resource allocation

Info

Publication number: WO2012119441A1
Application number: PCT/CN2011/079380
Authority: WO
Inventors: 孙方林; 张利; 赵泉波
Original assignee: 华为技术有限公司
Priority date: 2011-09-06
Filing date: 2011-09-06
Publication date: 2012-09-13
Also published as: CN102369685A; CN102369685B

Abstract

In one aspect, an embodiment of the present invention provides a method for indicating resource allocation. The method comprises: after allocating time slot resources to a user-side device, a network-side device comparing an original time slot resource block allocated to the user-side device with a reference time slot resource block to obtain a discrepancy part between the two resource blocks, and constructing resource block discrepancy indication information according to the discrepancy part; and the network-side device sending the resource block discrepancy indication information to the user-side device. Also provided is a network-side device, a user-side device and a system for indicating resource allocation. With this embodiment, resource block discrepancy indication information is constructed by using a discrepancy part relative to the reference time slot resource block, so that signaling overhead is greatly reduced.

Description

Resource allocation indication method, device and system

The present invention relates to the field of data communications, and in particular to a resource allocation indication method, apparatus and system. Background technique

In a communication system, in order for a digital signal to be transmitted in a channel, the carrier must be modulated with a digital signal. There are three basic modulation methods for transmitting digital signals: amplitude keying, frequency shift keying, and phase shift keying, which respectively correspond to the digital baseband signal transmitted by the amplitude, frequency, and phase of the sine wave. The above basic modulation methods all use one carrier signal, and therefore belong to the serial mode digital modulation and demodulation method. In order to improve the capacity and spectrum utilization efficiency of a broadband wireless communication system, a multi-carrier technique is often employed; it divides a wideband carrier into multiple subcarriers, and transmitting data in parallel on multiple subcarriers is called multi-carrier technology.

At present, multi-carrier technology has various forms, such as Orthogonal Frequency Division Multiplexing (OFDM). Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access ( SC-FDMA, Single-carrier Frequency-Division Multiple Access), Multi-Carrier CDMA (MC-CDMA, Multicarrier-Code Division Multiple Access), Multi-Carrier Direct Spread CDMA (MC-DS-CDMA, Mul ti carrier-Direct Sequence-Code) Division Multiple Access), and multi-carrier technology extended on the basis of the above. With the multi-carrier technology from theory to practical application, it has become an effective means of high-speed data communication, in wireless (such as LTE, WiMax, HSDPA), telephone lines (such as ADSL, VDSL), cable (such as HomePlug AV, HiNOC), etc. One of the focus technologies in the communication system.

In a multi-user communication system, a base station or a head end can control data traffic distribution and data transmission efficiency of each user terminal by frequency multiplexing (FDD) or/and time domain multiplexing (TDD) to achieve point-to-multipoint . _

Communication. For example, in the LTE system, the downlink uses orthogonal frequency division multiplexing (OFDM) and the uplink uses single carrier frequency division multiple access (SC-FDMA). In addition, a combination of 0FMDA and TDMA (Time Division Multiple Access) is adopted, so that resources can be divided on the time-frequency plane, that is, a group of subcarriers in a specific time period is called an RB (Resource Block). .

The uplink and downlink systems of LTE respectively divide the frequency resources into several resource units (Resource Element,

RE) and Physical Resource Block (PRB), RE and PRB are the minimum allocation units for resource partitioning. The data of the downlink user is sent in the form of a virtual resource block (VRB), and the VRB can be mapped to the PRB in a localized or distributed manner. The Localized mode occupies several adjacent PRBs. In this mode, the system can obtain multi-user gain through frequency domain scheduling. The distributed mode takes up a number of scattered PRBs. In this way, the system can obtain the frequency diversity gain. The uplink RE can be classified into localized or distributed, and the Localized method includes a set of adjacent subcarriers, and the distributed mode includes a set of distributed subcarriers. In order to maintain the single carrier signal format, if one UE (User Equipment, UE) occupies multiple centralized REs, these REs must be adjacent; if multiple dispersed REs are occupied, all subcarriers must be equally spaced.

The base station determines the resource allocation indication signaling according to the start/end position or sequence number of the consecutive time-frequency units allocated to the plurality of scheduling user equipments, and sends the control signaling that carries the resource allocation indication signaling to the user equipment; The scheduling user equipment determines, according to the resource allocation indication signaling, a time-frequency resource allocated thereto.

The network side allocates the allocation of each physical resource block by one bit, and constitutes a resource allocation indication sequence. "1" indicates that the physical resource block is allocated to the same user with a physical resource block adjacent thereto, "0" Indicates that the physical resource block is allocated to a different user from a physical resource block adjacent thereto. At the same time, "0" also indicates the end position of a contiguous physical resource block assigned to a user. Then, the scheduled UEs are correspondingly arranged in the order of consecutive physical resource blocks allocated thereto. The specific indication method is shown in Figure 1. .

However, in this technical solution, each time slot needs to have corresponding resource block difference indication information, but the indication message between each time slot may have duplicate information, if a large amount of distributed resource allocation indication is to be sent, signaling The rearranged user list information (ie, UE ID) must be indicated, such that there are many repeated information indicating the user list in the resource allocation indication sequence, and the resource block difference indication information may occupy a large amount of signaling overhead.

Summary of the invention

In view of the above problems, the present invention provides a resource allocation indication method, apparatus and system.

An aspect of the present invention provides a resource allocation indication method, including: after a network side device allocates a time slot resource to a user side device, the original time slot resource block allocated to the user side device is compared with a reference time slot resource block, and the obtained And the difference between the two resource blocks, the resource block difference indication information is configured according to the difference part; the network side device sends the resource block difference indication information to the user side device. Another aspect of the present invention provides a network side device, where the network side device includes a resource allocation unit, a difference indication information construction unit, a signaling construction unit, and a signaling sending unit, and the resource allocation unit is configured to be a user side device. Allocating the original time slot resource block; the difference indication information construction unit, configured to compare the original time slot resource block allocated to the user side device with the reference time slot resource block, to obtain a difference portion of the two resource blocks, according to The difference portion constructs resource block difference indication information;

The signaling sending unit is configured to send the resource block difference indication information to the user side device. Another aspect of the present invention provides a user side device, where the user side device includes a signaling receiving unit and a difference indication information analyzing unit, and the signaling receiving unit is configured to receive a resource block difference sent from the network side device. Indication .

Information, the resource block difference indication information indicating difference information of the original slot resource block and the reference slot resource block allocated to the user equipment; the difference indication information parsing unit, configured to use the resource block according to the resource block The difference indication information and the reference slot resource block obtain the original slot resource block indication information allocated to the user side device. Another aspect of the present invention provides a resource allocation indication system, where the system includes a network side device and a user side device; and after the network side device allocates a time slot resource to the user side device, the network side device allocates the time zone resource to the user side device. The original time slot resource block is compared with the reference time slot resource block to obtain a difference portion of the two resource blocks, and the resource block difference indication information is constructed according to the difference portion; the network side device uses the resource block difference indication information Sending to the user side device; the user side device receives the resource block difference indication information sent from the network side device, where the resource block difference indication information indicates the original time allocated to the user equipment The difference information of the slot resource block and the reference slot resource block; and the original slot resource block indication information allocated to the user side device according to the resource block difference indication information and the reference slot resource block.

Since the present embodiment constructs the resource block difference indication information by using the difference portion with respect to the reference slot resource block, the signaling overhead is greatly reduced. DRAWINGS

FIG. 1 is a schematic diagram of a physical resource block indication manner;

2 is a flowchart of a resource allocation indication method according to an embodiment of the present invention;

3 is a schematic diagram of a fixed difference bit map according to an embodiment of the present invention;

4 is a schematic diagram of a dynamic based difference bit map according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of distributed distribution of resource allocation indication signaling according to an embodiment of the present invention; FIG.

6 is a schematic diagram of centralized distribution of resource allocation indication signaling according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a network side device according to an embodiment of the present invention; .

FIG. 8 is a schematic structural diagram of a user side device according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a resource allocation indication system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS When performing resource allocation, the network side of the embodiment of the present invention compares the actual allocated resource allocation situation with a specific time slot resource allocation situation, and allocates the resource allocation of the difference. In the case, the difference indication information is constructed and sent to the user equipment user to reduce signaling. It should be noted that the resource block RB is referred to as a physical resource block PRB in LTE. Since the PRB and the RB indicate the same meaning, the following description is only for the RB for convenience of description; the following: the terminal, the user, the user equipment, and the user test Devices represent the same meaning. An embodiment of the present invention provides a resource allocation indication method. As shown in FIG. 2, the method includes: Step 201: After a network side device allocates a time slot resource to a user side device, the original time slot resource block allocated to the user side device is The reference time slot resource blocks are compared to obtain a difference portion of the two resource blocks, and the resource block difference indication information is constructed according to the difference portion; wherein the allocated time slot resource and the reference time slot resource are the same type of time slot. Resources. The resource block difference indication information may be resource block difference bitmap information, or may be other indication information. For example, in the resource block difference bitmap information, only the newly added resource block may be identified, and the deleted resource block is not indicated, and the deleted resource block is occupied by other user equipments (including actual user equipment and virtual user side equipment) (new The indication is performed, and the marking manner can be identified by using bitmap information. The reference time slot resource may be divided into a fixed reference time slot resource and a dynamic reference time slot resource, which respectively correspond to two types of fixed bit difference indication information and dynamic difference indication information. The fixed reference slot resource may be a fixed specific slot resource block in the current resource allocation period; the dynamic reference slot resource may be a corresponding slot before the current slot resource in the current period or in the current resource allocation period. A resource block of a corresponding time slot in the previous cycle. .

If the resource allocation period in which the current slot i is located is C, and there are at most k slots of the same type in one cycle, the fixed reference slot resource may be a resource block of a fixed slot m in the resource allocation period C. Where m is a constant, and 0 mk; the dynamic reference time slot resource may be a resource block of any one of the same type of time slot in the resource allocation period (C - 1 ), or in the resource allocation period C and before the time slot i Any resource block of the same type of time slot. The type of the difference indication information may be dynamically identified by using a newly added resource block to increase the flag bit, or a certain indication type may be fixed by reservation/negotiation. The former may add a N-bit flag bit in the resource allocation indication signaling to indicate the type of the bit difference map; the latter may negotiate to select when random or initial access, or directly specify a fixed bit difference map type . The following describes the process of constructing the difference indication information. As shown in Figure 3, the left side is the original indication information of the resource block in a resource block allocation period (that is, the original allocation of the resource block), if it is relative to a specific time. If the resource block #18 of the time slot 1 and the resource blocks #18 and #19 of the time slot i-1 are new resource blocks of the user, the network side device needs to be paired. The above three resource block locations are identified, as shown on the right side of FIG. It should be noted here that if the resource block #11 and the resource block #16 of the slot i-1 are previously allocated to the user, but this time is allocated to other users, or is not allocated, the location need not be identified. If it is allocated to other users, the resource block may be identified on the difference indication information corresponding to the allocated user; if a resource block is not allocated, it may be considered as being allocated to the virtual user side device, where the virtual user side is The device is not an actual user-side device. When all the actual user-side devices do not occupy a resource block of a certain location, the virtual user-side device uses the resource block to represent, for each actual user-side device. It is as if this resource block has been seized. The foregoing identification of the newly added resource block with respect to the resource block allocation of a specific time period may also be replaced with the resource block allocation of the previous corresponding time slot in the allocation period of the current resource block to the newly added resource block. Identification, such as time slot 1 versus time slot 0, time slot 2 versus time slot 1, and so on, of course, may also be dynamically relative to the first few corresponding time slots in the current period, for example, time slot 1 is relative to .

Slot 0, slot i relative to slot i-2; may also be replaced with a new resource block with respect to the resource block allocation of the corresponding slot in the previous resource block allocation period, for example, period i Slot 0 is relative to the last corresponding slot of period i-1. The corresponding time slots are the same type of time slots, for example, the same as uplink or downlink. If the resource block allocation of the previous corresponding time slot is relatively dynamic, such as time slot 1 relative time slot

0, resource block #18 is new; when H is not i=3, slot i-1 is slot 2, relative slot 1, resource block #19 is the new resource block of the user, then the network side device Only the location of the above two resource blocks needs to be identified, as shown in Figure 4. Step 203: The network side device sends the resource block difference indication information to the user side device.

For example, the message or signaling of the resource block difference indication information, such as the DL-MAP (Downlink map) and the DCI (Downlink Control Information), are obtained by the compression method (full indication information, positive offset, negative offset, etc.). ), etc., and then sent out through some common modulation methods.

Generally, the resource block difference indication information may be included in a message frame, where the message frame further includes a time slot resource corresponding to a time slot resource allocation message, where the time slot includes a data time slot, a sequence time slot, and Interval slots, where sequence slots and interval slots are optional; data slots can be single uplink or single downlink or uplink and downlink hybrid. The sequence slots can be used for channel training and random access, etc.; the interval slots can be used for uplink and downlink interval protection, and the like. The resource allocation indication information sent to the device is dispersed in different time slots in the transmission frame as shown in FIG. 5; and can be collectively located in a certain time slot of the frame (for example, time slot #0) for unified indication, such as Figure 6 shows. The data slot corresponds to the "slot" in the figure, and the indication information and the application data are included therein; the sequence slot corresponds to the DwPTS (Downlink Pilot TimeSlot) and UpTPS (Uplink Pilot TimeSlot) in the following figure. Pilot time slot), the interval time slot corresponds to the GP (Guard Period) of the following figure. .

The resource block difference indication information is arranged according to a certain sequence, and the resource block difference indication information can be determined as the resource block difference indication information of the user side device according to the sequence arrangement order; or the resource block difference The indication information includes an ID identifier of the user side device, and is used to identify that the resource block difference indication information is resource block difference indication information of the user side device.

The method further includes: Step 205: After the user side device receives the resource block difference indication information sent by the network side device, the resource block difference indication information and the reference time slot resource are compared. Block, obtaining original slot resource block indication information allocated to the user side device.

Specifically, if the resource block showing the location in the resource block difference indication information is new relative to the reference time slot resource block, determining that the resource block of the location is allocated to the user side device. Further, the step of obtaining the new resource block indication information further includes: if it is determined that the resource block of one location has been allocated to another user side device or the virtual user side device, determining that the resource block of the location is not allocated to the user side equipment.

Optionally, after receiving the resource block difference indication information sent by the network side device, the signaling receiving unit may request the network side device retransmission if the received resource block difference indication information is an error. The resource block difference indication information.

The slot resource block indication information is sent to the user side device; that is, the original slot resource block indication information and the resource block difference indication information are combined and sent to increase the robustness of the system. The user side device performs receiver configuration of the specified time slot according to the received indication message. Since the present embodiment constructs the resource block difference indication information by using the indication information of the difference between the two, it can be more flexibly applied to various multi-user communication environments, greatly reducing the signaling overhead; and using the original indication information and the difference. Indicating the manner in which the information is combined, periodically transmitting the original indication information may increase the robustness of the system. Further, based on frame scheduling, the network side device can divide each user in the time dimension by time. .

The resource block allocation on the slot is as small as possible, and the difference between the preceding and following time slots is small, which can significantly reduce the overhead of resource allocation indication signaling.

Another embodiment of the present invention further provides a network side device. As shown in FIG. 7, the network side device includes a resource allocation unit, a difference indication information construction unit, and a signaling sending unit. The user side device allocates the original time slot resource block; further, the time slot resource that can be allocated according to the traffic demand and/or the flow control policy of the user side device; the difference indication information construction unit is configured to be the user side The original time slot resource block allocated by the device is compared with the reference time slot resource block, and the difference portion of the two resource blocks is obtained, and the resource block difference indication information is constructed according to the difference portion; specifically, the new difference is added to the difference portion. The location of the resource block is marked, that is, if the resource block allocated by the resource allocation unit is compared with the reference time slot resource block, the resource block is newly identified, and the location of the resource block is identified; otherwise (if no change or deletion) Not identifying the resource block location; the signaling sending unit, configured to send the resource block difference indication information To the user-side device; Furthermore, the signaling transmission unit may select the original instruction information transmitted periodically to said user-side equipment.

The network side device may be specifically a mobile base station, a coaxial access head end, a home network node, or the like. Another embodiment of the present invention provides a user side device. As shown in FIG. 8, the user side device includes a signaling receiving unit and a difference indication information analyzing unit. The signaling receiving unit is configured to receive a slave network side. The resource block difference indication information sent by the device, where the resource block difference indication information indicates difference information of the original slot resource block and the reference slot resource block allocated to the user equipment; further, the signaling The receiving unit may request the network side device to retransmit the resource block difference indication information if the received resource block difference indication information is an error; . _

The difference indication information parsing unit is configured to obtain the original slot resource block indication information allocated to the user side device according to the resource block difference indication information and the reference slot resource block. The original slot resource block indication information indicates the slot resource that can be used by the user side device. The step of obtaining the original slot resource block indication information allocated to the user side device includes: if the resource block showing one location in the resource block difference indication information is new relative to the reference slot resource block, Determining that the resource block of the location is allocated to the user side device; further, if it is determined that the resource block of one location has been allocated to another user side device or a virtual user side device, determining that the resource block of the location is not Assigned to the user side device.

The user equipment may be specifically a mobile terminal, a broadband access terminal, a coaxial access terminal, a home network node, or the like. Another embodiment of the present invention provides a resource allocation indication system. As shown in FIG. 9, the network side device and the user side device are configured. After the network side device allocates time slot resources to the user side device, the network side device will be the user. The original slot resource block allocated by the side device is compared with the reference slot resource block to obtain a difference portion of the two resource blocks, and the resource block difference indication information is constructed according to the difference portion; the network side device uses the resource The block difference indication information is sent to the user side device; the user side device receives the resource block difference indication information sent from the network side device, where the resource block difference indication information indicates that the user is assigned to the user The difference information between the original time slot resource block of the device and the reference time slot resource block; and the original time slot resource block indication information allocated to the user side device according to the resource block difference indication information and the reference time slot resource block .

Since the present embodiment constructs the resource block difference indication information according to the difference portion of the relative reference time slot resource block, the signaling overhead is greatly reduced, and the flexible multi-user communication environment can be more flexibly applied; and the original indication information is used. The manner in which the difference indication information is combined, the original indication information is periodically transmitted, and the robustness of the system can be increased. Further, when the frame scheduling is performed, the network side device can pass .

The resource block allocation of each user in the time dimension (time slot) is equally divided, and the difference between the previous resource block and the previous time slot is used as small as possible, and the overhead of resource allocation indication signaling can be significantly reduced.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary hardware platform, and of course, all can be implemented by hardware. Based on such understanding, all or part of the technical solution of the present invention contributing to the background art may be embodied in the form of a software product, which may be stored in a storage medium, such as

ROM/RAM, diskette, optical disk, etc., comprising instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments or portions of the embodiments of the present invention. .

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request

A resource allocation indication method, characterized in that the method includes

After the network side device allocates the time slot resource to the user side device, the original time slot resource block allocated to the user side device is compared with the reference time slot resource block, and the difference portion of the two resource blocks is obtained, according to the difference portion. The resource block difference indication information is generated, and the network side device sends the resource block difference indication information to the user side device.

2. The resource allocation indication method according to claim 1, wherein the reference slot resource block includes a resource block of one slot in a current resource allocation period, or a period before a current resource allocation period. A resource block for one time slot.

The resource allocation indication method according to claim 1, wherein the resource block difference indication information is arranged according to a certain sequence, and the resource block difference indication information can be determined according to the sequence arrangement order. The resource block difference indication information of the user side device is included; or the resource block difference indication information includes an ID identifier of the user side device, where the resource block difference indication information is used to identify the resource block of the user side device Difference indication information.

The resource allocation indication method according to claim 1, 2 or 3, wherein the step of obtaining the difference portion between the two comprises: marking the newly added resource block in the difference portion.

The resource allocation indication method according to any one of claims 1 to 4, wherein the resource allocation indication information sent to the device is dispersed in different time slots in a transmission frame, or is concentrated in a transmission frame. Within a time slot.

The resource allocation indication method according to claim 4, wherein the marking method comprises identifying by using bit bitmap information.

The resource allocation indication method according to any one of claims 1 to 5, wherein the network side periodically transmits original slot resource block indication information allocated to the user side device to the Household equipment.

The resource allocation indication method according to any one of claims 1 to 7, wherein after the user side device receives the resource block difference indication information sent from the network side device, according to the resource block And the difference indication information and the reference time slot resource block, and the indication information of the original time slot resource block allocated to the user side device is obtained.

A network side device, wherein the network side device includes a resource allocation unit, a difference indication information construction unit, a signaling construction unit, and a signaling sending unit, and the resource allocation unit is configured to be a user side device. Allocating the original time slot resource block; the difference indication information construction unit, configured to compare the original time slot resource block allocated to the user side device with the reference time slot resource block, to obtain a difference portion of the two resource blocks, according to The difference part constructs resource block difference indication information; the signaling sending unit is configured to send the resource block difference indication information to the user side device.

The network side device according to claim 9, wherein the resource block difference indication information is arranged according to a sequence, and the resource block difference indication information can be determined according to the sequence arrangement order. The resource block difference indication information of the user side device; or the resource block difference indication information includes an ID identifier of the user side device, where the resource block difference indication information is used to identify a resource block difference of the user side device Instructions.

The network side device according to claim 9 or 10, wherein the reference time slot resource block includes a resource block of one time slot in a current resource allocation period, or a period before a current resource allocation period A resource block within a time slot.

The network side device according to claim 9, wherein the network side device is moving Mobile base station, coaxial access head end or home network node.

A user-side device, the user-side device includes a signaling receiving unit and a difference indication information analyzing unit, and the signaling receiving unit is configured to receive the resource block sent from the network side device. a difference indication information, where the resource block difference indication information indicates difference information of the original slot resource block and the reference slot resource block that are allocated to the user equipment; the difference indication information parsing unit is configured to The resource block difference indication information and the reference time slot resource block obtain original channel resource block indication information allocated to the user side device.

The user side device according to claim 13, wherein the step of obtaining the original slot resource block indication information allocated to the user side device comprises: displaying the resource block difference indication information If the resource block of one location is new relative to the reference time slot resource block, it is determined that the resource block of the location is allocated to the user side device; if it is determined that the resource block of one location has been allocated to other user side devices Or the virtual user side device determines that the resource block of the location is not allocated to the user side device.

A resource allocation indication system, wherein the system includes a network side device and a user side device; and after the network side device allocates a time slot resource to the user side device, the original device is allocated to the user side device. The time slot resource block is compared with the reference time slot resource block, and the difference portion of the two resource blocks is obtained, and the resource block difference indication information is constructed according to the difference portion; the network side device sends the resource block difference indication information The user side device receives the resource block difference indication information sent from the network side device, where the resource block difference indication information indicates the original time slot allocated to the user equipment Difference information between the resource block and the reference time slot resource block; according to the resource block difference indication information and the reference time The slot resource block obtains original slot resource block indication information allocated to the user side device.