WO2009039755A1

WO2009039755A1 - Method, device and system for uplink resource sharing

Info

Publication number: WO2009039755A1
Application number: PCT/CN2008/072284
Authority: WO
Inventors: Juejun Liu
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-09-20
Filing date: 2008-09-06
Publication date: 2009-04-02
Also published as: CN101394586A; CN101394586B

Abstract

A method and device for uplink resource sharing, the method including: receiving an indication message sent by an user terminal, according to the indication message sent by the user terminal judging current state of the user terminal; when the state of the user terminal being about to enter a silence period or in a silence period, reserving reservation resources from the uplink resources allocated to the user terminal, that the user terminal can use the reservation resource to send the indication message; allocating the uplink resource excepting the reservation resource to user terminals excepting this user terminal.

Description

Method, device and system for uplink resource sharing

The present invention relates to the field of communications, and in particular to a method, device and system for uplink resource sharing. Background technique

In a wireless communication system, the uplink (UL) direction is: the direction in which the wireless access terminal transmits data to the base station (BS); and the downlink direction is: the direction in which the base station transmits data to the wireless access terminal. The wireless access terminal may include a mobile terminal (MS) and a fixed terminal (SS). In an Orthogonal Frequency Division Multiple Access (OFDMA) system, to ensure that different users are used in the uplink or downlink.

The orthogonality is maintained between different frequency resources, so the uplink and downlink resources of the BS are uniformly scheduled. For example, for uplink resource scheduling, the BS may notify the scheduled radio access terminal by the control signaling, and the radio access terminal performs data transmission on the uplink resource allocated by the BS.

In the current communication field, wireless communication systems support Voice over Internet Protocol (VoIP) services. The VoIP service is a delay-sensitive service in which the voice coder generates a voice packet every 20 ms, and the voice packet is transmitted through a wireless air interface to provide voice services. Due to the periodic nature of VoIP services, the BS can periodically allocate resources to users to transmit VoIP services. According to the direction of VoIP service transmission, VoIP services can be classified into uplink VoIP and downlink VoIP.

For upstream VoIP services, the current 802.16e protocol provides support for unsolicited bandwidth allocation services (UGS) and extended real-time polling services (ertPS). For UGS, the BS periodically allocates fixed-bandwidth resources to the user, allowing the user to transmit uplink data on the allocated resources. However, due to the characteristics of the VoIP service itself, such as VoIP services using blanking technology, during the VoIP silent period (ie, when the user is in the "listening" state), the user may not need to send data on the uplink or simply Send a background noise packet at regular intervals to maintain the link, so if you still follow UGS The characteristics of the service are to allocate resources for these VoIP, so the allocated resources will be wasted when the VoIP is in the silent period. The ertPS service also periodically allocates resources to users, but the BS can change the size of allocated resources or allocate resources according to user feedback. If the user finds that the VoIP at the next moment will be in the silent period, the BS can be notified by means of in-band signaling, and the BS can no longer allocate resources to the user at the next moment, and allocate resources to the VoIP service allocated to the user. For other users, when the user's VoIP service returns to the call state from the silent period, the user will perform a bandwidth request through the ranging channel, and the BS re-allocates resources for the user's VoIP service according to the bandwidth request.

In the process of implementing the present invention, the inventors have found that in the above prior art, when the VoIP user returns to the call state from the silent period, the user will send a bandwidth request through the competitive ranging channel. Since the competition is adopted, conflict collisions may occur, so the bandwidth request returned by the user may not be correctly parsed by the BS. When the BS does not allocate the corresponding resource for the user, the user can only continue to send the bandwidth request at the next moment, requesting to allocate resources for it, and the occurrence of this situation will not satisfy the VoIP service sensitivity to delay, thereby increasing VoIP transmission delay. In addition, due to the limitation of the bandwidth allocation of the ranging sub-channel, the user can perform the ranging operation to apply for the bandwidth only when the current sub-channel is allocated to the user. In addition, in the scenario of a large number of VoIP users, if a large number of VoIP services need to apply for bandwidth through the ranging operation and return the call state from the silent period, the load of the ranging channel will be greatly increased, causing a large impact on other users applying for bandwidth. interference. Summary of the invention

A main object of the embodiments of the present invention is to provide a method, an apparatus, and a system for uplink resource sharing, so as to implement uplink resource sharing and make full use of uplink resources.

In order to achieve the above objective, a method for uplink resource sharing is provided in the embodiment of the present invention, where the method includes:

Receiving an indication message sent by the user terminal, and determining, according to the indication message sent by the user terminal, the current state of the user terminal;

When the current state of the user terminal is about to enter the silent period or is in the silent period, reserve resources are reserved from the uplink resources allocated to the user terminal, so that the user terminal can use the reserved resource to send Sending an indication message; allocating uplink resources other than reserved resources to user terminals outside the user terminal for use.

An embodiment of the present invention further provides an apparatus for uplink resource sharing, where the apparatus includes: a determination module, a resource allocation module, and a sending module;

The determining module is configured to receive an indication message sent by the user terminal, determine the current state of the user terminal according to the indication information sent by the user terminal, and send the determination result to the resource allocation module, where the resource allocation module is configured to The received judgment result, when the current state of the user terminal is about to enter the silent period or in the silent period, the resource is reserved in the uplink resource allocated to the user terminal, and is allocated to the uplink resource of the user terminal. Allocating an uplink resource other than the reserved resource to the user outside the user terminal in the silent period; outputting the resource allocation message including the resource allocation information to the sending module;

The sending module is configured to send the received resource allocation message.

The embodiment of the present invention further provides a user terminal, where the user terminal includes: a feedback module, a message receiving module, and a data sending module;

The feedback module is configured to send an indication message;

The message receiving module is configured to learn the allocated resource according to the received resource allocation message, and send the information of the allocated resource to the data sending module;

The data sending module is configured to send data by using the allocated resources according to the received information of the allocated resources.

An embodiment of the present invention further provides a system for uplink resource sharing, the system comprising: a device for sharing a user terminal and an uplink resource;

The user terminal is configured to send an indication message to the device for sharing the uplink resource, and receive a resource allocation message sent by the device that is shared by the uplink resource, and learn the allocated resource according to the received resource allocation message. Resource

The uplink resource sharing device is configured to receive an indication message sent by the user terminal, and determine, according to the received indication information sent by the user terminal, a current state of the user terminal; when the current state of the user terminal is When entering the silent period or in the silent period, it is assigned to the user terminal. Allocating resources in the uplink resource, and allocating uplink resources other than reserved resources in the uplink resources allocated to the user terminal to users outside the user terminal; and transmitting resources including the information of the resource allocation Assign a message.

The embodiment of the present invention can be used to reserve a resource for the user terminal after the user terminal enters the silent period, so that when the user terminal is in the silent period, the resource originally allocated to the user terminal can be shared. Used by other user terminals, thereby improving the utilization of resources. DRAWINGS

1 is a schematic diagram of slot time-frequency resources in the prior art;

2 is a schematic diagram of slot time-frequency resources after being set according to an embodiment of the present invention;

3 is a flowchart of a method for uplink resource sharing in an embodiment of the present invention;

FIG. 4 is a schematic diagram of an apparatus for uplink resource sharing according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings.

In the 802.16e protocol, the basic unit of UL data transmission allocation resources is a slot. From a logical point of view, each slot is a continuous time frequency resource block (ie, a frequency sub-block). The carrier χ 0 0FDMA symbol) can be mapped to physical resources through certain mapping rules. Different mapping rules can obtain different effects. For example, the effect of frequency diversity can be obtained by breaking up the time-frequency resources to the entire frequency band, and the frequency selective scheduling gain can be obtained by continuously mapping the time-frequency resources. In order to ensure that the data receiving end can perform channel estimation and then decode according to the channel estimation value, a certain subcarrier is reserved in each slot as a pilot subcarrier.

For each user terminal, the BS will allocate one or more basic slots for UL data transmission for each user terminal on the UL. FIG. 1 is a schematic diagram of logical time-frequency resource allocation in the prior art. As shown in Figure 1, the black dot portion represents the pilot subcarrier, and the white dot portion represents the data subcarrier. Wave.

In the embodiment of the present invention, the logical time-frequency resource of the UL Slot is set, and a resource is reserved for the user terminal by reserving a certain time-frequency resource for each Slot resource block, so that the user terminal (for example, , VoIP user) can quickly return from the silent period to the call state through the reserved resources.

FIG. 2 is a schematic diagram of slot time-frequency resources after setting according to an embodiment of the present invention. As shown in FIG. 2, the part marked with "X" indicates the reserved subcarrier resource. The logical resource diagram is shown in FIG. 2, and in actual application, the above logical resource needs to be mapped to the physical subcarrier. Above.

FIG. 3 is a flowchart of a method for uplink resource sharing in an embodiment of the present invention. As shown in FIG. 3, the method for uplink resource sharing in the embodiment of the present invention includes the following steps:

Step 301: The BS allocates all one UL slot to one VoIP user.

Step 302: The VoIP user transmits the UL VoIP packet on the physical resource corresponding to the UL slot. In the actual application, the above steps 301 and 302 can form a cycle, and by the cycle as described above, the VoIP user can transmit data through the slot allocated by the BS. After the BS allocates a certain slot to the VoIP user in a certain period, if the VoIP is about to transition to the silent period, the following step 303 can be performed.

Step 303: When the VoIP user is about to transition to the silent period, the VoIP user carries an indication message in a last sent VoIP packet (the indication message may be in-band signaling mode), and notifies the BS that the message enters the silent period. .

Step 304: After receiving the foregoing indication message, the BS allocates the UL slot resource originally allocated to the VoIP user to other users by using control signaling, for example, to be used by a data service user, and The data service user is informed that the UL slot resource can be used, but the resource reserved in the UL slot resource cannot be used, that is, the frequency resource reserved for the part of the VoIP user marked "X" cannot be used.

Step 305: The other user, for example, the data service user, transmits data through the foregoing UL slot resource.

Step 306, when the VoIP user needs to return from the silent period to the call state, the foregoing The VoIP user can send an indication message by using the frequency resource reserved in the UL slot resource, that is, an indication message with a length of 1 bit (bit), and notify the BS that it will return to the call state.

Step 307: The BS allocates all resources in the VoIP slot resource to the VoIP user for use according to the received indication information.

Since the above-mentioned silent period generally lasts for a certain period of time, the VoIP user can send an indication information to the BS through the foregoing reserved resources at regular intervals during the silent period to notify the BS that the VoIP user also needs to maintain the uplink. Therefore, the meaning of the indication information sent by VoIP on the reserved resources can be pre-defined. For example, if the indication information is 1, it indicates that the VoIP user needs to return from the silent period to the call state; if the indication information is 0, it indicates that the VoIP user needs to maintain the uplink, but does not need to switch to the call state. The above indication information can be transmitted by Binary Phase Shift Key (BPSK) modulation, and 1 of the above indication information can be mapped to symbol + 1 and information 0 can be mapped to symbol - 1; The symbol is repeated 16 times and then mapped to the corresponding physical subcarrier resource for transmission.

The number and location of the reserved resources mentioned above may be determined in advance by a protocol, or may be determined according to a certain algorithm. For example, in order to randomize interference, the reserved resources may be in different positions in each frame. The original VoIP user, the data user sharing the VoIP slot resource, and the BS can accurately calculate the location of the reserved resource in each frame according to the above protocols and algorithms. In addition, since the VoIP slot resource needs to be allocated to other users for sharing, in order not to affect the channel estimation of these users, the reserved resources may not occupy the resources occupied by the pilot subcarriers. In addition, the shared user may be a data service user or another VoIP user. The scheduling of the resources of the original VoIP user during the silent period is completely determined by the BS. However, once the original VoIP user sends the indication information to the BS and requests to return to the call state, the BS must ensure that the VoIP slot resource can be reassigned to the original VoIP user. At this time, the shared user may still need data transmission, and the BS may All other idle resources continue to be assigned to shared users.

In the foregoing embodiment, the case of allocating a slot for a VoIP user is introduced. If multiple slot resources need to be allocated for a VoIP user, the reservation may be reserved in each slot resource according to the foregoing reservation method. Certain resources. When the VoIP user is in the silent period, the BS can Multiple slot resources are allocated to one or more users. If the original VoIP user needs to return to the call state, the original VoIP user can send indication information to the BS on the resources reserved in each slot. Since there are more resources reserved, the original VoIP user can reduce the power of transmitting the indication information, thereby reducing interference to other users.

In addition, in the prior art, the BS may allocate resources to the user by using the resource assignment message. Therefore, in the foregoing method provided in the embodiment of the present invention, the resource assignment message of the BS needs to be modified accordingly, thereby The BS can be notified by the modified resource assignment message whether the user completely occupies resources or partially occupies resources. For example, the BS in the foregoing method allocates resources to the original VoIP user to completely occupy resources. At this time, the original VoIP user can use all the allocated resources to send data; and for the data service user in the above method, the BS The resource assignment of the data service user is partially occupied by resources, and the reserved resources cannot be used. Therefore, the data service user can only use other resources than the reserved resources to send data. This is also in line with the different requirements for different service QoS, that is, the VoIP service has higher delay requirements, so the VoIP user has higher priority than the data service user, and the performance of the Volp user should be prioritized.

4 is a schematic diagram of a system for uplink resource sharing in an embodiment of the present invention. As shown in FIG. 4, the system for uplink resource sharing in the embodiment of the present invention includes: a user terminal 400 and a base station 401.

The user terminal 400 is configured to send an indication message to the base station 401, and receive a resource allocation message sent by the base station 401, learn the allocated resource according to the received resource allocation message, and send the data by using the allocated resource;

The base station 401 is configured to receive an indication message sent by the user terminal 400, and determine, according to the received indication information sent by the user terminal 400, a current state of the user terminal 400; when the current state of the user terminal 400 is about to enter In the silent period or in the silent period, the resources are reserved in the uplink resources allocated to the user terminal 400, and the uplink resources other than the reserved resources in the uplink resources allocated to the user terminal 400 are allocated. At least one other user terminal other than the user terminal 400 is used; when the current state of the user terminal 400 is returned to the call state from the silent period, all the uplink resources allocated to the user terminal 400 are allocated to the user terminal 400 for use; Transmitting a resource allocation message including the information of the resource allocation described above to the user terminal 400 or His user terminal. In addition, base station 401 can also receive data transmitted by user terminal 400 over the allocated resources.

Specifically, the user terminal 400 further includes: a feedback module 402, a message receiving module 403, and a data sending module 404.

The feedback module 402 is configured to send an indication message to the base station 401.

The message receiving module 403 is configured to receive the resource allocation message sent by the base station 401, learn the allocated resource according to the received resource allocation message, and send the information of the allocated resource to the data sending module 404;

The data sending module 404 is configured to send data to the base station 401 by using the allocated resources according to the received information of the allocated resources.

The base station 401 includes: a determining module 405, a resource allocating module 406, and a sending module 407. The determining module 405 is configured to receive the indication message sent by the user terminal 400, determine the current state of the user terminal 400 according to the received indication information sent by the user terminal 400, and send the determination result to the resource allocation module 406;

The resource allocation module 406 is configured to allocate resources to the user terminal 400 according to the received determination result, that is, when the current state of the user terminal 400 is about to enter a silent period or is in a silent period, then the user is allocated to the user terminal. Allocating resources in the uplink resources of 400, and allocating uplink resources other than the reserved resources in the uplink resources allocated to the user terminal 400 to at least one other user terminal except the user terminal 400; When the current state of the user terminal 400 is that the call state is returned from the silent period, all the uplink resources allocated to the user terminal 400 are allocated to the user terminal 400 for use; and the resource allocation message including the resource allocation information is output to the sending module. 407;

The sending module 407 is configured to send the received resource allocation message to the user terminal 400 and other user terminals;

In addition, the base station 401 can further include a data receiving module 408 for receiving data sent by the user terminal 400 through the allocated resources.

The above method and apparatus provided according to an embodiment of the present invention can be reserved for VoIP users The method of less resources enables the VoIP user to send indication information to the BS through the reserved resource, and informs that the call will be returned to the call state, and the BS can immediately assign the corresponding resource to the VoIP user, thereby ensuring the transmission requirement of the VoIP service. . Since the foregoing reserved resource is not based on a contention manner, the performance of the indication information can be ensured by the VoIP user, that is, the BS can obtain the indication information sent by the VoIP user accurately and timely, and thus the VoIP user can be made. You can quickly return to the call state from the silent period. In addition, since the BS shares the resources originally allocated to the VoIP user to other users when the VoIP user is in the silent period, the utilization of resources is improved.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

A method for uplink resource sharing, the method comprising: receiving an indication message sent by a user terminal, and determining, according to an indication message sent by the user terminal, a current state of the user terminal;

When the current state of the user terminal is about to enter the silent period or is in the silent period, reserve resources are reserved from the uplink resources allocated to the user terminal, so that the user terminal can use the reserved resource to send an indication message; The uplink resources other than the reserved resources are allocated for use by user terminals other than the user terminal.

2. The method according to claim 1, wherein the method further comprises:

When the current state of the user terminal is from the silent period to the call state, the uplink resources allocated to the user terminal are all allocated to the user terminal for use.

The method according to claim 2, wherein the determining the current state of the user terminal comprises:

And determining, according to the indication identifier in the indication message sent by the user terminal to the base station by using the reserved resource, according to the preset time interval, whether the current state of the user terminal is changed from a silent period to a call state.

4. The method according to claim 1, wherein the reserved resource does not occupy resources of a pilot subcarrier.

The method according to claim 1, wherein the leaving the reserved resource from the uplink resource allocated to the user terminal further includes:

When there are at least two time slot resources in the uplink resources allocated to the user terminal, reserved resources are reserved in each time slot resource.

An apparatus for uplink resource sharing, the apparatus comprising: a determining module, a resource allocating module, and a sending module;

The determining module is configured to receive an indication message sent by the user terminal, determine the current state of the user terminal according to the indication information sent by the user terminal, and send the determination result to the resource allocation module;

The resource allocation module is configured to reserve resources in an uplink resource allocated to the user terminal when the current state of the user terminal is about to enter a silent period or a silent period, and allocate an uplink resource to the user terminal. The uplink resource other than the reserved resource is allocated to the user terminal other than the user terminal in the silent period; and the resource allocation message including the information of the resource allocation described above is output to the sending module;

The device according to claim 6, wherein the resource allocation module is further configured to:

When the current state of the user terminal is from the silent period to the call state, the resource allocation module allocates all the uplink resources allocated to the user terminal to the slave. Used by the user terminal that returns to the call state during the silent period.

The device according to claim 6, wherein the device further comprises: a data receiving module, configured to receive data sent by the user terminal through the allocated resources.

A user terminal, the user terminal comprising: a feedback module, a message receiving module, and a data sending module;

The feedback module is configured to send an indication message;

10. A system for uplink resource sharing, the system comprising: a device for sharing a user terminal and an uplink resource;

The device for sharing the uplink resource is configured to receive an indication message sent by the user terminal, and determine, according to the received indication information sent by the user terminal, a current state of the user terminal; when the current state of the user terminal is Enter silent period or in silent period When the resource is allocated in the uplink resource allocated to the user terminal, and the uplink resource other than the reserved resource in the uplink resource allocated to the user terminal is allocated to the user terminal other than the user terminal. Sending a resource allocation message containing the information of the resource allocation described above.

The device according to claim 10, wherein the device for uplink resource sharing is further used to:

When the current state of the user terminal is from the silent period to the call state, the uplink resource sharing device allocates all the uplink resources allocated to the user terminal to the user terminal that returns to the call state from the silent period. use.