WO2008095393A1 - Method of uplink resources distributing on a time division sharing channel mode and base station thereof - Google Patents

Abstract

A method of uplink resources distributing on a time division shared channel mode is disclosed in embodiments of the invention. The method includes that a BS accesses into a network initially,and when the BS detects that a neighboring BS exists in the network, it receives from the neighboring BS an uplink resources selection informing message which carries information of the uplink resources selected by the neighboring BS; the BS initially accessing into the network distributes the uplink resources which do not overlap the uplink resources selected by the neighboring BS. A BS for uplink resources distributing on the time division shared channel mode is disclosed in embodiments of the invention too. By applying the method and the BS disclosed in embodiments of the invention, the different BSs can be distributed different uplink resources so as to avoid the possibly appearing conflicts between each other, avoid the possibility of transferring the same signallings repeatedly, and to economize the resources.

Description

 Uplink resource allocation method and base station in time sharing shared channel mode

 The present invention relates to wireless communication technologies, and in particular, to an uplink resource allocation method and a base station in a time sharing shared channel mode. Background of the invention

 The continuous development of wireless communication technology has put more and more demands on the wireless spectrum, and the existing spectrum resources are limited, so it is necessary to improve the utilization of the wireless spectrum, especially the utilization rate of the licensed frequency band. In recent years, cognitive radio technology has been proposed. Wireless devices supporting cognitive radio technology can dynamically sense changes in the surrounding environment, and adaptively adjust internal states according to environmental changes, thereby effectively utilizing the idle spectrum and avoiding other systems. In particular, authorized users cause interference. However, the idle spectrum resources are also very limited, so each wireless device needs to share the same channel with other devices in a time sharing manner. There are many ways to share, which may be time-sharing channel sharing based on asynchronous carrier frame listening I collision detection mode, or time-sharing channel sharing based on synchronous cooperation mode.

In the prior art, a time-sharing channel sharing method based on synchronous cooperation mode is proposed, which divides a media access control (MAC) frame into two parts: one part is used in the transmission system without interference. The data (common), called the common subframe; the other part is used to transmit the interference data, called the interference subframe. The interference subframe is periodically and uniquely assigned to a system, and the interference subframe is referred to as the primary subframe of the system. In the primary subframe of a system, the system can transmit at maximum power, while other systems reduce their transmit power or even transmit during this period to avoid interference with the system using the primary subframe. This subframe is called A secondary subframe of the neighbor system. The common subframe can be one A part of the MAC frame may also occupy a complete frame of the MAC frame. At this time, the common subframe is also called a shared sub-frame. There are more than four ways to allocate common and interfering subframes.

 Figure 1 is a schematic diagram of the structure of two existing systems with interference between each other. As shown in FIG. 1, system A is composed of base station A, terminal 1, terminal 2 and terminal 3. System B is composed of base station B, terminal 4, terminal 5 and terminal 6. The terminal 3 belongs to the system A, but because it is within the coverage of the base station B, the terminal 3 is interfered by the base station B during the communication process, and the terminal 3 also generates certain interference to the base station B. 4 is the same as in the case of terminal 3. FIG. 2 is a schematic diagram of the system shown in FIG. 1 adopting a time sharing MAC frame mode for data transmission. After adopting the time sharing sharing mode, in a common subframe, system A transmits data related to terminal 1 and terminal 2, and system B transmits data related to terminal 5 and terminal 6; in the main subframe of system A, That is, in the secondary subframe of system B, system A transmits data related to terminal 3, and system B needs to reduce the transmission power or not during this period, thereby avoiding causing interference to system A; correspondingly, in the next MAC frame. In the primary subframe of system B, that is, the secondary subframe of system A, system B transmits data related to terminal 4, and system A needs to reduce the transmission power or not to transmit at this time to avoid interference to system B. Only the time sharing mode of the downlink channel is shown in FIG. 2, and the uplink channel is similar to the downlink channel, and will not be described again.

However, in the time sharing mode of the time sharing, when the terminal in the common coverage area performs the uplink ranging (horizontal) in the terminal 3 and the terminal 4 in FIG. 1, the uplink ranging request signal sent by the terminal may be The two adjacent base stations are simultaneously received by the two neighboring base stations, and the corresponding two base stations may respond to the uplink ranging request at the same time, that is, all the uplink ranging resources are allocated for the uplink ranging request, thereby causing waste of resources and conflicts. Summary of the invention

 The embodiment of the invention provides an uplink resource allocation method in a time sharing channel mode, which can avoid resource waste and conflict.

 The embodiment of the invention provides an uplink resource allocation base station in a time sharing channel mode, and the base station can avoid resource waste and conflict.

 The technical solution of the embodiment of the present invention is implemented as follows:

 An uplink resource allocation method in a time-sharing shared channel mode, the method includes: the base station initially accesses the network, and when detecting that there is a neighboring base station in the network, receiving an uplink resource selection notification message from the neighboring base station, where the uplink resource selection is performed The notification message carries the uplink resource information selected by the neighboring base station;

 The base station of the initial access network allocates uplink resources that do not overlap with the uplink resources selected by the neighboring base station.

 An uplink resource allocation base station in a time sharing channel mode, the base station includes: a detection module, a resource selection notification module, and an uplink resource allocation module;

 The detecting module is configured to detect whether a neighbor base station exists in the network, and send the detection result to the resource selection notification module;

 The resource selection notification module is configured to receive a detection result from the detection module, and if there is a neighbor base station, receive an uplink resource selection notification message from the neighbor base station, and notify the uplink resource selected by the neighbor base station to The uplink resource allocation module;

 The uplink resource allocation module is configured to receive a notification message from the resource selection notification module, and allocate an uplink resource that does not overlap with an uplink resource selected by the neighboring base station according to the notification message.

It can be seen that, by using the technical solution of the embodiment of the present invention, each base station in the network obtains non-repetitive uplink resources through negotiation, so that each base station can transmit signaling in the respective uplink resources, thereby avoiding mutual occurrence. Conflict, and avoid the same signaling with repeated responses Possible, saving resources. BRIEF DESCRIPTION OF THE DRAWINGS

 The above and other features and advantages of the present invention will become more apparent to those skilled in the <

 Figure 1 is a schematic diagram of the structure of two existing systems with interference between each other;

 FIG. 2 is a schematic diagram of the system shown in FIG. 1 adopting a time sharing MAC frame mode for data transmission;

 3 is a schematic structural diagram of a base station embodiment of the present invention;

 4 is a general flow chart of an embodiment of a method of the present invention;

 Figure 5 is a flow chart of a preferred embodiment of the method of the present invention. Mode for carrying out the invention

 In the embodiment of the present invention, each base station performs shared resource allocation negotiation, and performs uplink resource allocation according to the negotiation result.

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

 FIG. 3 is a schematic structural diagram of a base station embodiment of the present invention. As shown in FIG. 3, the base station mainly includes a detection module 301, a resource selection notification module 302, and an uplink resource allocation module 303;

 The detecting module 301 is configured to detect whether a neighbor base station exists in the network, and send the detection result to the resource selection notification module 302.

The resource selection notification module 302 is configured to receive the detection result from the detection module 301, and if there is no neighbor base station, notify the uplink resource allocation module 303 that there is no neighbor base station in the network; if there is a neighbor base station, receive the uplink resource selection from the neighbor base station. Notification message, and The uplink resource selected by the neighboring base station is notified to the uplink resource allocation module 303. The uplink resource allocation module 303 is configured to receive the notification message from the resource selection notification module 302, and perform uplink resource allocation according to the notification message: if there is a neighboring base station, the allocation is performed. An uplink resource that is different from the uplink resource selected by the neighboring base station; if there is no neighboring base station, the uplink resource is allocated according to its own needs.

 The base station further includes a resource update module 304 and an update request sending module 305. The resource update module 304 is configured to receive an update uplink resource setup request from the update request sending module 305, and determine whether the updated uplink resource setting is uplink with the neighbor base station. If the resources are not in conflict, the updated uplink resource settings are notified to the neighboring base station; if the conflict occurs, the resource update module 304 sends an update uplink resource setting request to the neighboring base station, and receives the received uplink base station from the neighboring base station. The response message is sent to the update request sending module 305;

 The update request sending module 305 is configured to send an update uplink resource setting request to the resource update module 304, and notify the uplink resource allocation module 303 to update or maintain the original uplink resource setting according to the neighbor base station response message sent by the resource update module: If the response message indicates that the neighboring base station agrees to give up its own uplink resource, the update request sending module 305 notifies the uplink resource allocation module 303 to update the original uplink resource setting; if the response message indicates that the neighboring base station does not agree to release its own uplink resource, The update request sending module 305 notifies the uplink resource allocation module 303 to maintain the original uplink resource setting.

 The base station further includes an update request receiving module 306, configured to receive an update uplink resource setup request from the neighbor base station, and send back a response message to the neighbor base station to agree to give up its own uplink resource.

If a base station fails to update its own uplink resource setting, it may continue to initiate an update request. For example, the base station wants to add two time slots when first requesting to update the uplink resource setting, but does not obtain the consent of the neighbor base station. In this way, the base station is subsequently You can choose to continue to maintain the original uplink resource settings, or you can choose to continue to initiate the update of the uplink resource setup request. For example, you only need to add one time slot. The subsequent processing is the same as the first request update, and will not be described again.

 Based on the above base station equipment, FIG. 4 is a general flowchart of an embodiment of a method according to the present invention. As shown in Figure 4, the following steps are included:

 Step 401: The base station initially accesses the network, detects whether there is a neighbor base station in the network, and if yes, receives an uplink resource selection notification message from the neighbor base station.

 The uplink resource selection notification message carries the uplink resource information selected by the neighboring base station. For example, if the resource sharing mode of the time-sharing shared MAC frame is used in FIG. 2, the uplink resource selection notification message described in this step carries the primary subframe information selected by the neighboring base station.

 The base station of the initial access network and the neighboring base station can perform information exchange to obtain the required information. The base station of the initial access network learns the location of the neighboring base station and the neighbor base station by querying the database, and sends a request message to the neighbor base station. Requesting to obtain the uplink resource information that has been selected by the neighboring base station, and the neighboring base station sends back an uplink resource selection notification message; or, when the base station initially accesses the network, the base station sends a broadcast message to each neighboring base station in the network, and the neighbor base station learns that there is a new base station according to the broadcast message. Join the network and send an uplink resource selection notification message to the base station. The above methods are all prior art and will not be described in detail.

 Step 402: The base station that initially accesses the network allocates uplink resources that do not overlap with the uplink resources selected by the neighboring base station.

In this step, the base station that initially accesses the network allocates its own uplink resource according to the result of step 401: If the detection result indicates that there is no neighboring base station in the network, the base station that initially accesses the network may allocate uplink resources according to its own needs, if the detection result is displayed. If there are other neighboring base stations in the network, the base station of the initial access network allocates uplink resources different from the uplink resources that the neighboring base station has selected in step 401. Optionally, the base station that initially accesses the network selects itself. The selected uplink resource informs the neighbor base station.

 Correspondingly, if the time-sharing shared MAC frame resource sharing mode shown in FIG. 2 is adopted, the method for the base station of the initial access network to allocate the uplink resource different from the uplink resource selected by the neighboring base station is: A subframe different from the neighbor base station is used as its own primary subframe, and only allocates uplink resources during its own primary subframe, and does not allocate uplink resources during common subframes and secondary subframes; or, only in the interference-free region of the corresponding terminal Allocating uplink resources, that is, for the terminals in the common coverage area, only the uplink resources are allocated in the primary subframe, and the terminals that are not interfered by the neighbor system or do not interfere with the neighbor system may allocate uplink resources in the primary subframe, or may also be in the common sub-frame. The frame allocates uplink resources.

 Further, when any base station in the network needs to update its own uplink resource setting, for example, a certain base station in the network needs to add uplink resources to the existing selected uplink resource base because of the need of data transmission, then The base station needs to determine whether the updated uplink resource setting conflicts with the uplink resource setting of the existing neighboring base station. If there is no conflict, the updated uplink resource setting only needs to be notified to the neighboring base station; if the conflict occurs, the base station needs to The neighboring base station sends an update uplink resource setting request, and if the neighboring base station returns a message for agreeing to release its own uplink resource after the request is sent, the base station updates its own uplink resource setting, and if the neighboring base station does not agree to let its own uplink resource, The base station can only maintain the original uplink resource settings, cannot update, or perform a new update uplink resource setting process.

 The uplink resource is an uplink initial ranging resource, or, for the wireless MAN-OFDMA physical layer of the wireless metropolitan area network, the uplink resource is an uplink initial ranging resource, and an uplink period is generated. Ranging resources and uplink switching ranging resources.

The method of the present invention will be further described in detail by the preferred embodiments. FIG. 5 is a flow chart of a preferred embodiment of the method of the present invention. The uplink resource in this embodiment is an uplink initial ranging resource, as shown in FIG. 5, and includes the following steps: Step 501: The base station initially accesses the network, and detects whether there is a neighbor base station in the network. If not, step 502 is performed; if yes, step 503 is performed.

 Step 502: The base station that initially accesses the network allocates its own uplink initial ranging resource according to its own needs.

 If the base station wishes to update its own initial initial ranging resource setting, then step 506 is performed.

 Step 503: The base station that initially accesses the network receives an uplink resource selection notification message from the neighbor base station.

 If there is a neighboring base station in the network, it indicates that the base station of the initial access network needs to share the channel resources with other neighboring base stations, and the base station of the initial access network performs information exchange with the neighboring base station to receive uplink resource selection from the neighboring base station. The notification message is used to learn the uplink initial ranging resource that the neighbor base station has selected.

 If the resource sharing mode of the time-sharing shared MAC frame is used, the uplink resource selection notification message described in this step carries the primary subframe information selected by the neighboring base station.

 Step 504: The base station of the initial access network selects an uplink initial ranging resource different from the uplink initial ranging resource that the neighbor base station has selected.

 Step 505: The base station that initially accesses the network notifies the neighbor base station of the uplink initial ranging resource selected by itself.

 Step 506: Any base station in the network needs to update its initial initial ranging resource setting. First, it is determined whether the updated initial initial ranging resource setting conflicts with the uplink initial ranging resource setting of the existing neighboring base station, and if not, the execution is performed. Step 507; If the conflict occurs, step 508 is performed.

Step 507: The base station that needs to update the initial initial ranging resource setting notifies the neighboring base station of the updated uplink initial ranging resource setting, and ends the process. Step 508: The base station that needs to update the initial initial ranging resource setting sends an update uplink resource setting request to the neighboring base station, where the message carries the updated uplink initial ranging resource setting.

 Step 509: The neighboring base station sends a response message to the base station that needs to update the initial initial ranging resource setting. If the neighboring base station does not agree to give up its initial initial ranging resource, the base station that needs to update the initial initial ranging resource setting can only maintain the original If the neighboring base station agrees to give up its initial initial ranging resource, the base station that needs to update the initial initial ranging resource setting updates the original uplink initial ranging resource setting, and ends. Process.

 The method for implementing the uplink resource allocation of each base station by using the time-sharing MAC frame mode is similar to that of FIG. 5, except that each base station allocates uplink resources in respective primary subframes or only allocates corresponding primary subframes and common subframes. Upstream resources. However, the process of how to select the respective primary subframes and how to operate the primary subframe settings of the same is the same as that of FIG. 5, and details are not described herein again.

 It can be seen that, by adopting the technical solution of the embodiment of the present invention, each base station in the network obtains each non-repetitive uplink resource through negotiation, so that each base station can transmit signaling in each uplink resource, thereby avoiding mutual possibility. Conflicts occur and avoid the possibility of repeatedly responding to the same signaling, saving resources.

 In conclusion, 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, equivalents, 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

Claim  A method for allocating an uplink resource in a time sharing channel mode, the method comprising:  The base station initially accesses the network, and when detecting that there is a neighboring base station in the network, receiving an uplink resource selection notification message from the neighboring base station, where the uplink resource selection notification message carries the uplink resource information selected by the neighboring base station;  The base station of the initial access network allocates uplink resources that do not overlap with the uplink resources selected by the neighboring base station.  The method according to claim 1, wherein the time-sharing shared channel mode is a time-sharing shared medium access control MAC frame mode, and the uplink resource information selected by the neighboring base station is selected by the neighboring base station. Primary subframe information;  The method for the base station of the initial access network to allocate the uplink resource that does not overlap with the uplink resource selected by the neighboring base station is: the base station of the initial access network selects a subframe different from the neighboring base station as its own master. Frames, and allocate uplink resources only during their own primary subframes, or allocate uplink resources only during their own primary subframes or during common subframes.  The method according to claim 1, wherein the method further comprises: the base station of the initial access network notifying the neighboring base station of the uplink resource selected by itself.  The method according to claim 1, wherein the method further comprises: if any base station in the network needs to update its own uplink resource setting, the base station first determines whether the updated uplink resource setting is related to the neighbor. The uplink resource settings of the base station conflict; If there is no conflict, the updated uplink resource setting is notified to the neighboring base station; if the conflict occurs, the updated uplink resource setting request is sent to the neighboring base station, and if the neighboring base station receives the consent returned The base station updates its own uplink resource setting, and the base station updates its own uplink resource setting. If the neighboring base station returns a disagreement to release its own uplink resource information, the base station maintains the original uplink resource setting or performs a new update uplink resource. Setup process.  The method according to any one of claims 1 to 4, wherein the uplink resource is an uplink initial ranging ranging resource;  Or, the uplink initial ranging resource, the uplink periodic ranging resource, and the uplink switching ranging resource.  An uplink resource allocation base station in a time sharing channel mode, the base station includes: a detection module, a resource selection notification module, and an uplink resource allocation module; and the detection module is configured to detect whether a neighbor exists in the network. a base station, and sending the detection result to the resource selection notification module;  The resource selection notification module is configured to receive a detection result from the detection module, and if there is a neighbor base station, receive an uplink resource selection notification message from the neighbor base station, and notify the uplink resource selected by the neighbor base station to The uplink resource allocation module;  The uplink resource allocation module is configured to receive a notification message from the resource selection notification module, and allocate an uplink resource that does not overlap with an uplink resource selected by the neighboring base station according to the notification message.  The base station according to claim 6, wherein the uplink resource allocation module is further configured to: if the resource selection notification module notifies a neighborless base station in the network, the uplink resource allocation module allocates according to its own needs Upstream resources.  The base station according to claim 6 or 7, wherein the base station further comprises: a resource update module and an update request sending module; The resource update module is configured to receive an update uplink resource setting request from the update request sending module, and determine whether the updated uplink resource setting conflicts with an uplink resource setting of the neighboring base station, and if not, the information is updated. Upstream resource setting notification to neighbor base Sending an update uplink resource setting request to the neighboring base station, and transmitting a response message of the received neighboring base station to the update request sending module;  The update request sending module is configured to send an update uplink resource setting request to the resource update module, and notify the uplink resource allocation module to update or maintain the original uplink resource according to the neighbor base station response message sent by the resource update module. Setting: if the response message shows that the neighboring base station agrees to give up its own uplink resource, the update request sending module notifies the uplink resource allocation module to update the original uplink resource setting; if the response message shows that the neighboring base station does not If the uplink resource is allowed to be released, the update request sending module notifies the uplink resource allocation module to maintain the original uplink resource setting.  The base station according to claim 8, wherein the base station further comprises: an update request receiving module, configured to receive an update uplink resource setup request from the neighbor base station, and send back to the neighbor base station whether to agree to let the uplink The response message for the resource.