WO2008083603A1

WO2008083603A1 - Reuse assignment method and system

Info

Publication number: WO2008083603A1
Application number: PCT/CN2007/071387
Authority: WO
Inventors: Meng Zhao; Yinggang Du
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-01-06
Filing date: 2007-12-29
Publication date: 2008-07-17
Also published as: CN101217776A

Abstract

A reuse assignment method comprises: a base station persistently assigning reuse resources to a reuse user through a reuse assignment message, and assigning a start of packet channel to the reuse user; the reuse user detecting bearer state on the start of packet channel, determining whether to receive data packets transmitted on the reuse resources according to a detecting result. Additionally, a reuse assignment system is also provided by the present invention and comprises: a base station for sending a reuse assignment message to a reuse user device, persistently assigning reuse resources to the reuse user device, assigning a start of packet channel to the reuse user device, and sending the position of the start of packet channel assigned to the reuse user; a reuse user device, for detecting a bearer state on the start of packet channel, and determining whether to receive data packets transmitted on the reuse resources. The present invention can realize persistent assignment of the reuse resources, reduction of signaling overhead, and saving of power resources.

Description

Reuse method and system for reuse

The present invention relates to resource allocation techniques in wireless communications, and more particularly to a reuse assignment method and system. Background of the invention

Air Interface Evolution (AIE) is a wireless access technology proposed by 3GPP2, a third-generation mobile communication cooperative project organization, which uses Orthogonal Frequency Division Multiplexing (OFDM) technology as the basis of the physical layer. In the AIE system, the forward resource is divided into several basic nodes (BaseNode). Taking 5M bandwidth as an example, the forward resource is divided into about 32 BaseNodes, and the guard band is removed. The number of BaseNodes used for data transmission is about 28, and at least 3 BaseNodes are used for transmission control signaling. The base station assigns resources other than the resources occupied by the control signaling to the user by using the assignment message. The assignment message is transmitted in the forward shared signaling channel (F-SCCH). Table 1 shows the message structure transmitted in the F-SCCH channel. The vertical direction of the table indicates different messages, and the horizontal direction indicates different area fields.

Block

Field MACID Persistent ChanID PF Duration Ext.TX Timing Suppl. Rank type

# bits 3 9-11 1 6-8 4-6 2 1 6 1 2

Access

000 1 0 0 0 0 0 1 0 0 Grant

FLAM 010 0 1 1 1 0 1 0 1 0

RLAM 011 0 1 1 1 0 1 0 1 0

MCW

100 TBD TBD TBD TBD TBD TBD TBD TBD TBD FLAM1

MCW

101 TBD TBD TBD TBD TBD TBD TBD TBD TBD FLAM2

Sew 110 TBD TBD TBD TBD TBD TBD TBD TBD TBD

FLAM Among them, FLAM is used for the assignment of forward resources; RLAM is used for the assignment of reverse resources. It can be seen from Table 1 that both the forward resource assignment message FLAM and the reverse resource assignment message RLAM contain a Persistent field, which is used to indicate whether the assignment is a persistent assignment. The so-called persistent assignment means that the terminal continues to occupy this resource until an explicit de-allocation indication is received or a packet transmission failure occurs. In contrast, a non-persistent assignment is a non-persistent assignment. A non-persistent assignment means that the currently assigned resource is only used for the transmission of the current data packet. Once the current data packet is transmitted or the transmission fails, the current reference is End of the match.

Depending on the type of resource being assigned, users can be divided into persistent users and non-persistent users. For a persistent user, the resource is always allocated to it, and even if there is currently no data to transfer, the resources allocated to the persistent user cannot be used by other users. In this case, if the persistent user is idle for a long time, it will inevitably cause a serious waste of resources.

The reuse of the solution can solve the above problem of resource waste. The basic idea is: When the persistent user is in an idle state, the resource is assigned to the non-persistent user. This assignment is called a reuse assignment. The resource that is reused is called a reuse resource, and the user that is reused is called a reuse user. In this solution, the base station informs the reused user whether the reused resource is available through the bitmap message; at the same time, the base station establishes a new packet indication channel (Start-Packet Channel, F-SPCH) for the persistent users, and performs a new packet indication for the persistent user. And send a signal to the persistent user at a certain period that their resources are still on hold. If the persistent user does not detect a valid packet and does not receive a signal indicating that it is on hold when the period is satisfied, then its allocation expires. The signal transmission on the F-SPCH channel is the same as that on the forward ACK channel in the AIE. It is transmitted in the on-off mode and supports four transmission states, namely three on states and one off state. In addition, the F-SPCH channel and the node are - corresponding, that is, how many nodes have how many F-SPCHs correspond to them.

The base station assigns the reused resource to the reused user by reusing the assignment message. Table 2 shows the structure of the message transmitted in the F-SCCH channel after the assignment of the assignment message is added. In Table 2, SP FLAM, SP MCW FLAMl and SP SCW FLAM These assignment messages beginning with SP are all reused assignment messages. The SP FLAM message corresponds to the sending and receiving scene of the single antenna receiving antenna; the SP MCW FLAM1 and the SP SCW FLAM correspond to the receiving and receiving scenes of the multi-received and multi-transmitting.

Access Grant OOOO

0001

MCW FLAM1

MCW FLAM2

SCW FLAM

Table 2

It can be seen from Table 2 that the reuse of the assignment message does not enable the Persistent domain, and the reuse of the assignment itself can only be non-persistent, and the continuous assignment of reused resources cannot be achieved. That is to say, the reused resource assigned to the reused user by the reused assignment message is limited to the transmission of the current data packet, and once the current data packet is transmitted or the transmission fails, the reuse assignment ends. If the base station wishes to continue to assign the resource to the reused user, the base station must resend the reused assignment message to the reused user. Since the assignment message belongs to the signaling category, a strong transmission power is required for transmission. Therefore, frequently transmitting the reuse assignment message tends to increase the signaling overhead, resulting in waste of power resources. Summary of the invention

In view of the above, it is an object of the present invention to provide a reuse method and system for achieving continuous assignment of reused resources.

To achieve the above objective, the re-use assignment method provided by the embodiment of the present invention is as follows: The base station continuously assigns the reused resource to the reused user by reusing the assignment message, and allocates a new packet indication channel for the reused user;

The reused user detects the status of the new packet indicating the bearer on the channel, and determines whether to connect according to the detection result. The data packet transmitted on the reclaimed resource.

In addition, an embodiment of the present invention further provides a re-use and assignment system, where the system includes: a base station and a reused user equipment, where

a base station, configured to send a reused assignment message to the reused user equipment, continuously assign the reused resource to the reused user equipment, and allocate a new packet indication channel to the reused user equipment, and send the allocated new packet indication channel location to the reused user equipment;

Reusing the user equipment, detecting the status of the bearer on the new packet indication channel, and determining whether to receive the data packet transmitted on the reused resource according to the detection result.

It can be seen that, in the embodiment of the present invention, the base station can continuously assign the reused resource to the reused user by reusing the assignment message, and does not need to send the reused assignment message to the reused user every time the data packet is sent, but only in the first A persistent assignment re-use assignment message can be sent once when sending a data packet, thereby reducing signaling overhead and saving power resources. Moreover, the reused user has its own new packet indication channel, which can conveniently perform power control and obtain higher accuracy. In addition, the new packet indicated by the base station for the reused user indicates that the channel only occupies a resource that is not used by the persistent user or a reserved node, and does not add any additional resource burden. BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flowchart of a method for reusing assignment according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a reuse assignment system according to an embodiment of the present invention. Mode for carrying out the invention

The present invention will be further described in detail below with reference to the drawings and embodiments.

As shown in FIG. 1 , the re-use assignment method provided by the embodiment of the present invention mainly includes the following steps: Step 101: The base station continuously assigns the reused resource to the reused user by reusing the assignment message, and allocates a new packet indication channel F- for the reused user. SPCH; Step 102: The reusing user detects the state of the bearer on the F-SPCH, and determines whether to receive the data packet transmitted on the reused resource according to the detection result.

The resource generally refers to a basic node BaseNode; and the reused assignment message is a message such as SP FLAM, SP MCW FLAM1 or SP SCW FLAM. The base station informs the reused user of the location of the reused resource by reusing the assignment message.

Different from the prior art, in the prior art, the reuse assignment itself can only be non-persistent, and the reused resource can only be assigned to the non-persistent user, even if the base station sends the same specification packet to the same reused user each time. The base station must also send the reused assignment message to the reused user each time. In the embodiment of the present invention, the reused resource can be continuously assigned to the reused user, and the base station does not need to send the reused finger to the reused user every time the data packet is sent. With the message, the re-use assignment message of the persistent assignment can be sent only when the data packet is sent for the first time, and the reused user that is continuously assigned is based on the reuse indicator received for the first time in the subsequent communication process. The message is received by the message. This reduces signaling overhead and saves power resources.

Among them, the persistent assignment of reused resources can be achieved by enabling the persistent domain of the reused message. Table 3 shows the modified message structure of the reused assignment. In Table 3, the persistent field of the reused assignment message such as SP FLAM, SP MCW FLAM1, SP SCW FLAM is set to 1.

table 3

For ease of distinction, the following persistent users are referred to as normal-persistent users, and reuse users who continue to use reused resources are referred to as sp-persistent users. In the embodiment of the present invention, in order to support persistent assignment of reused resources, the base station needs to allocate a new packet indication channel F-SPCH to the sp-persistent user.

As can be seen from the background art, the F-SPCH is corresponding to the base node BaseNode. In order to save resources and not add any additional resource burden, there are two basic principles to follow when assigning F-SPCH to sp-persistent users:

1. When the number of basic nodes occupied by the resources allocated for the normal-persistent user is greater than 1, the base station allocates the F-SPCH corresponding to the node that is not used by the normal-persistent user to the sp-persistent user.

When the number of remaining nodes is greater than 1, the base station may randomly select one of them, or select according to a preset policy.

2. When the number of basic nodes occupied by the resources allocated for the normal-persistent user is equal to 1, the base station will not allocate the F-SPCH corresponding to the node used by the user, that is, the reserved node (such as the node corresponding to the guard band or the control channel). Assigned to sp-persistent users.

The base station then sends the location of the assigned F-SPCH to the sp-persistent user. Regarding the location of the F-SPCH corresponding to the sp-persistent user, the base station can send the message to the sp-persistent user through the reuse of the assignment message, or can be sent to the sp-persistent user through the upper layer signaling when the sp-persistent user initially accesses.

For the second basic principle, the following ways can be allocated:

1) The base station randomly selects an F-SPCH from all the F-SPCHs corresponding to the reserved nodes and assigns them to the sp-persistent user, and notifies the sp-persistent user of the location of the F-SPCH through layer 3 signaling.

2) The base station sequentially numbers all the reserved nodes starting from 0 according to the physical resource order, and calculates the modulus value of the node number corresponding to the reused resource assigned to the sp-persistent user to the number of reserved nodes, and then the node The F-SPCH corresponding to the node with the same modulus value is assigned to the sp-persistent user.

For example, suppose the number of reserved nodes is n, and they are numbered sequentially according to the physical resource order: 0. 1 n- 1. If the node number corresponding to the reused resource occupied by the sp-persistent user is M, the node number corresponding to the resource occupied by the F-SPCH is equal to M mod n.

3) The base station sequentially numbers all the reserved nodes starting from 0 according to the physical resource order, and divides the nodes other than the reserved nodes into n groups in order, and each group node has a one-to-one correspondence with each reserved node. The base station first determines the group to which the node corresponding to the reused resource assigned to the sp-persistent user belongs, and then assigns the F-SPCH corresponding to the reserved node of the group to the sp- according to the correspondence between each group of nodes and each reserved node. Persistent user.

For example, suppose the number of reserved nodes is n, and they are numbered sequentially according to the physical resource order: 0.

1 n-1 , and all nodes except the reserved node are equally divided into n groups in order, and each group node corresponds to each reserved node. In this way, the base station and the sp-persistent user can know the node number corresponding to the resource occupied by the corresponding F-SPCH according to the corresponding relationship.

When allocating resources, the base station should avoid the situation where the resources occupied by two F-SPCHs are mapped to the same node.

It should be noted that the F-SPCH in the prior art is mainly used to indicate whether the normal-persistent user currently sends a new packet, or whether it is a resource hold state. In the embodiment of the present invention, the F allocated for the sp-persistent user. The SPCH is not only used to indicate whether the sp-persistent user is currently sending a new packet, or whether it is a resource hold state, and is also used to indicate whether the sp-persistent user performs resource release.

For example, the F-SPCH corresponding to the sp-persistent user carries the following four states:

^ (state): sp- persistent to assign;

^夫态2 ( On ): sp-persistent pass new package;

State 3 ( On ): sp-persistent remains;

Status 4 ( Off ): Reserved.

The sp-persistent user can determine the transmission of data packets on the reused resource by detecting the state of its own F-SPCH. For example, when the detected F-SPCH state is state 1, sp-persistent is used. The user stops receiving the data packet transmitted on the reused resource, releases the resource, and waits for further indication from the base station; when the detected F-SPCH state is state 2, the sp-persistent user receives the data packet transmitted on the reused resource, and then Waiting for the next detection time to arrive; When the detected F-SPCH status is state 3, the sp-persistent user does not process any data packets transmitted on the reused resource, waiting for the next detection time to arrive.

Further, the F-SPCH corresponding to the sp-persistent user can also be used to indicate the status of the normal-persistent user, and the sp-persistent user can know the status of the normal-persistent user by detecting the bearer status of the F-SPCH. For example, the following four states are carried on the F-SPCH corresponding to the sp-persistent user:

State 1 ( On ): normal-persistent, sp-persistent to assign;

State 2 ( On ): normal-persistent hold, sp-persistent pass;

State 3 ( On ): normal-persistent passes the new package, sp-persistent remains;

State 4 ( Off ): normal-persistent remains, sp-persistent remains.

The sp-persistent user detects the bearer status on its own F-SPCH in real time and performs corresponding processing according to the detection result.

When the detected state is state 1 (normal-persistent hold, sp-persistent de-assignment), the sp-persistent user stops receiving data and waits for further indication from the base station;

When the detected state is state 2 (normal-persistent hold, sp-persistent packet transfer), the sp-persistent user receives the data packet transmitted on the reused resource, and then waits for the next detection time to arrive;

When the detected state is state 3 (normal-persistent new packet, sp-persistent hold), the sp-persistent user waits for the next detection time to arrive;

When the detected state is off (normal-persistent hold, sp-persistent hold) state 4, the sp-persistent user waits for the next detection time to arrive.

In addition, in order to improve the demodulation performance, sp-persistent users can also combine their own corresponding F-SPCH. The bearer status on the host and the information sent by the base station indicating whether the resource is available, such as bitmap information, jointly determine the data packet transmission condition on the reused resource. These two kinds of information can be mutually verified, enhancing the reliability of the sp-persistent user solution F-SPCH.

Moreover, the base station can also assign the same resource to multiple sp-persistent users, that is, perform user overlap port transmission on the sp-persistent. These sp-persistent users determine whether to demodulate the current data packet according to the bearer status on its corresponding F-SPCH, and will not cause error handling.

In addition, the embodiment of the present invention further provides a reusing and assigning system. As shown in FIG. 3, the system mainly includes: a base station and a reused user equipment.

The base station is configured to send a reuse assignment message to the reused user equipment, continuously assign the reused resource to the reused user equipment, and allocate a new packet indication channel to the reused user equipment, and send the allocated new packet indication channel location to the reused user equipment;

The reuse user equipment is configured to detect a state of the bearer on the new packet indication channel, and determine, according to the detection result, whether to receive the data packet transmitted on the reused resource.

The base station may specifically include: a resource assignment unit and a channel allocation unit. The resource assignment unit is configured to send a reuse assignment message to the reused user equipment, and continuously assign the reused resource to the reused user equipment. The channel allocation unit is configured to allocate a new packet indication channel to the reused user equipment, and allocate the new packet. The indication channel location is sent to the reused user equipment.

The reusing user equipment may specifically include: a status detecting unit and a processing unit. The status detecting unit is configured to detect a status of the bearer on the new packet indication channel, and send the detection result to the processing unit. The processing unit is configured to determine, according to the received detection result, whether to receive the data packet transmitted on the reused resource. .

The above-mentioned objects, technical solutions, and advantageous effects of the present invention are further described in detail. It is to be understood that the above description is not intended to limit the present invention, and is within the spirit and principles of the present invention. Any modifications, equivalent substitutions, improvements, etc., shall be included in the scope of protection of the present invention. Within the fence.

Claims

Claim

A reuse assignment method, characterized in that the method comprises:

The base station continuously assigns the reused resource to the reused user by reusing the assignment message, and assigns a new packet indication channel to the reused user;

The reused user detects the state of the new packet indicating the bearer on the channel, and determines whether to receive the data packet transmitted on the reused resource according to the detection result.

The method according to claim 1, wherein the base station continuously assigns the reused resource to the reused user by reusing the assignment message, including:

The base station sends a reuse assignment message to the reusable user and enables reuse of the domain in the assignment message indicating whether the assignment is continued.

The method according to claim 1, wherein the allocating a new packet to the reused user indicates that the channel comprises:

When the number of basic nodes occupied by resources allocated for the persistent user is greater than 1, the base station allocates a new packet indication channel corresponding to the node that is not used by the user to the reused user, and sends the allocated new packet indication channel location to the reuse. user.

When the number of basic nodes occupied by the resources allocated for the persistent user is equal to 1, the base station allocates the new packet indication channel corresponding to the reserved node to the reused user, and transmits the allocated new packet indication channel location to the reused user.

The method according to claim 3 or 4, wherein the transmitting the location of the allocated new packet indication channel to the reused user comprises:

The base station transmits the location of the new packet indication channel to the reused user by reusing the assignment message; or, the base station sends the location of the new packet indication channel to the reused user by using upper layer signaling.

The method according to claim 4, wherein the reserved node is a guard band or The node corresponding to the control channel.

The method according to claim 4 or 6, wherein the base station assigns a new packet indication channel corresponding to the reserved node to the reused user, including:

The base station randomly selects a new packet from the new packet indication channel corresponding to all the reserved nodes to indicate that the channel is allocated to the reused user;

Alternatively, the base station sequentially numbers all the reserved nodes starting from 0 according to the physical resource order, and calculates a modulus value of the node number corresponding to the reused resource assigned to the reused user, and the module number and the mode. The new packet corresponding to the node with the same value indicates that the channel is allocated to the reused user; or, the base station sequentially numbers all the reserved nodes starting from 0 according to the physical resource order, and divides the nodes other than the reserved node into n groups in order, and Each group of nodes and each of the reserved nodes, corresponding to the new packet indication channel corresponding to the reserved node corresponding to the group to which the node corresponding to the reused resource of the reused user belongs, is allocated to the reused user.

The method according to any one of claims 1 to 4, wherein the status of the new packet indication channel uploading comprises: reusing the user to transmit a new packet, reusing the user resource to assign, and reusing the user resource to maintain;

The reusing user determines whether to receive the data packet transmitted on the reused resource according to the detection result, including:

When the detection result is that the reused user transmits a new packet, the reused user receives the data packet transmitted on the reused resource;

When the detection result is to reuse the user resource to be assigned, the reused user stops receiving the data packet uploaded by the reused resource, and releases the resource;

When the detection result is that the reused user resource is maintained, the reused user does not receive the data packet transmitted on the reused resource, waiting for the next detection time to come.

The method according to claim 8, wherein the status indicated by the new packet indication channel further comprises a status of the persistent user.

10. The method according to claim 1, wherein the method further comprises: the base station transmitting information indicating whether the resource is available to the reused user;

The reuse user determines whether to receive the data packet transmitted on the reuse resource according to the detection result: the reuse user determines whether to receive the data packet transmitted on the reuse resource according to the detection result and the information sent by the base station indicating whether the resource is available.

11. A reuse assignment system, the system comprising: a base station and a reuse user device, wherein

The system according to claim 11, wherein the base station comprises: a resource assignment unit and a channel assignment unit, where

a resource assignment unit, configured to send a reuse assignment message to the reused user equipment, and continuously assign the reused resource to the reused user equipment;

And a channel allocation unit, configured to allocate a new packet indication channel to the reused user equipment, and send the allocated new packet indication channel location to the reused user equipment.

The system according to claim 11 or 12, wherein the reusable user equipment comprises: a state detecting unit and a processing unit, wherein

a state detecting unit, configured to detect a state carried on the new packet indication channel, and send the detection result to the processing unit;

And a processing unit, configured to determine, according to the received detection result, whether to receive the data packet transmitted on the reused resource.