CN101277469A - A method, device and system for realizing packet data retry uplink - Google Patents

Abstract

The present invention relates to the technical field of wireless communication. The invention provides a method of realizing grouped data retrial upstream, and device and system, when the network side finds the current area having no available resource, an adjacent area having enough wireless resources is selected, wireless resources are distributed in the adjacent area, and the mobile terminal is appointed to the adjacent area, so as to realize retrial upstream, as far as possible to meet the data transmission requirement of user.

Description

A method, device and system for realizing packet data retry uplink

technical field

The present invention relates to the technical field of wireless communication, in particular to a method, device and system for realizing packet data retry uplink.

Background technique

General Packet Radio Service (GPRS) is a packet data switching technology introduced in the Global System For Mobile Communication (GSM) network. It is superimposed on the GSM system and prolongs the service life of GSM. It is based on the forwarding of packet data packets and the statistical multiplexing of channels, so that the data service provided by the existing GSM leaps from 9.6Kbps to more than 100Kbps for the first time. Since GPRS still uses the same Gaussian Minimum Shift Keying (GMSK) modulation method as GSM, the transmission rate cannot reach the 2Mbps required by the third generation mobile communication (Third Generation, 3G) business. In order to fully meet the bandwidth requirements of future wireless multimedia applications, Enhanced Data Rates for GSM Evolution (EDGE) provides a transitional solution from GPRS to 3G mobile communications. EDGE is a data-enhanced mobile communication technology based on GSM/GPRS network, and it is usually called 2.75G technology. This technology mainly lies in the ability to use broadband services, enabling networks using 800, 900, 1800, and 1900MHz frequency bands to provide some functions of the third-generation mobile communication network.

GPRS or EDGE technology provides users with packet data services. On the air interface between the mobile terminal and the base station, user service data is transmitted through Temporary Block Flow (TBF). A TBF is a physical connection used between a mobile terminal and a base station to support unidirectional uplink protocol data unit (Protocol Data Unit, PDU) transmission on a packet data physical channel.

When the mobile phone needs to send service data to the network, it needs to send a packet resource request message to the network to request to establish an uplink TBF. In the prior art, the resource allocation process before packet data uplink transmission is shown in Figure 1, including the following steps:

Step 101: the mobile terminal sends an uplink packet resource request message to the network;

Step 102: After receiving the packet resource request, the network side, that is, the base station subsystem ("Base Station System" or "Base Station Subsystem", BSS), judges whether it can support the service, that is, whether the current cell can allocate corresponding resources to the mobile terminal. wireless resources, if yes, execute step 103; otherwise execute step 104;

Step 103: The BSS sends a packet uplink TBF assignment message to the mobile terminal, allocates one or more TBFs to the mobile terminal, and then performs a process of uplink packet data transmission based on the allocated TBFs.

Step 104: The BSS sends a rejection message to the mobile terminal, refusing to allocate radio resources for the mobile terminal.

During the process of creating the present invention, the inventor found at least the following problems in the prior art: when the mobile terminal needs to perform packet uplink data transmission, if the network side cannot allocate wireless resources to the mobile terminal in the current cell, it can only reject the mobile terminal. The application of the packet data uplink transmission service is greatly limited due to the request of the mobile terminal, which affects the user experience.

Contents of the invention

In view of this, an embodiment of the present invention proposes a method for retrying uplink packet data, which can implement uplink transmission of packet data through resources of adjacent cells when the current cell has no available wireless resources. The method comprises the steps of:

After receiving the uplink packet resource request from the mobile terminal, the network side finds that there is no wireless resource available for allocation in the current cell, and then selects a neighboring cell with sufficient wireless resources as the target neighboring cell;

The network side assigns the radio resource of the target neighboring cell to the mobile terminal, and the mobile terminal performs uplink transmission of packet data based on the radio resource.

The embodiment of the present invention also proposes a method for packet data uplink, including the following steps:

The network side receives the uplink packet resource request from the terminal and the signal quality measurement results of the current cell and neighboring cells, and selects the cell with the best signal quality as the target cell according to the measurement results;

The network side assigns the radio resource of the target cell to the mobile terminal, and the mobile terminal performs uplink packet data transmission based on the radio resource.

The base station subsystem BSS for implementing packet data retry uplink proposed by the embodiment of the present invention includes:

Adjacent cell information configuration module, used to save the descriptive information list of each cell that is adjacent to each other;

The resource judging module is used to judge whether there are enough wireless resources in the current cell after receiving the uplink packet resource request from the mobile terminal, and if not, notify the selection module;

A selection module, configured to select a neighboring cell as a target neighboring cell from the description information list saved by the neighboring cell information configuration module after receiving the notification from the resource judging module;

The resource allocation module is used to allocate radio resources in the target neighboring cell selected by the selection module, and assign the allocated radio resources to the mobile terminal.

The embodiment of the present invention also proposes a system composed of a BSS and a mobile terminal to realize packet data retry uplink. The mobile terminal includes:

A measurement module, configured to measure the signal quality of neighboring cells and generate measurement results;

The reporting module is configured to send the measurement results obtained by the measurement module to the BSS.

The BSS includes a resource judgment module, which is used to judge whether there are enough wireless resources in the current cell after receiving the uplink packet resource request from the mobile terminal, and if not, notify the selection module;

The selection module is configured to select the neighboring cell as the target neighboring cell according to the signal quality measurement result from the mobile terminal after receiving the notification from the resource judging module;

The resource allocation module is used to allocate radio resources in the target neighboring cell selected by the selection module, and assign the allocated radio resources to the mobile terminal.

It can be seen from the above technical solutions that when the network side finds that the current cell has no available resources, it selects a neighboring cell with sufficient radio resources, allocates radio resources in the neighboring cell, and assigns the mobile terminal to the neighboring cell. In this way, uplink transmission of packet data is retried, which better satisfies the user's data transmission requirements and enhances the user's service experience.

Description of drawings

FIG. 1 is a flowchart of resource allocation before uplink transmission of packet data in the prior art;

FIG. 2 is a schematic diagram of a signaling interaction process for realizing uplink transmission of packet resources according to the first embodiment of the present invention;

FIG. 3 is a schematic diagram of a signaling interaction process for realizing uplink transmission of packet resources according to the second embodiment of the present invention.

Detailed ways

The technical solution provided by the embodiment of the present invention is used to allocate wireless resources for the mobile phone in an adjacent cell if the current cell has no wireless resources to allocate when the mobile terminal initiates an uplink packet resource request, so as to realize packet data uplink transmission. The scheme of the present invention mainly comprises following two basic steps:

Step A: The network judges in which adjacent cell to allocate resources;

Step B: According to the judgment result of step A, assign the radio resource of the adjacent cell to the mobile terminal.

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further elaborated below in conjunction with the accompanying drawings.

The signaling interaction process for realizing uplink transmission of packet resources provided by the first embodiment of the present invention is shown in FIG. 2 , including the following steps:

Step 201: the mobile terminal sends an uplink packet resource request to the BSS to which the current cell belongs. Hereinafter, the BSS to which the current cell belongs is referred to as a source BSS.

Step 202: The source BSS judges whether the current cell has enough radio resources to allocate to the mobile terminal, and if so, allocates one or more TBFs to the mobile terminal in the current cell as in the prior art, and then performs grouping based on the allocated TBFs The process of data uplink transmission; otherwise, execute step 203;

Step 203: The source BSS selects an adjacent cell with sufficient radio resources among the adjacent cells of the current cell as the target adjacent cell.

Step 204: The source BSS sends a packet handover request to the core network, and the request carries target neighbor cell description information including the target neighbor cell identifier.

Step 205: The core network forwards the packet handover request to the BSS to which the target neighboring cell belongs. Hereinafter, the BSS to which the target neighboring cell belongs is referred to as the target BSS.

Step 206 to Step 207: The target BSS allocates one or more TBFs in the target neighboring cell, and sends a packet switching response message to the core network, and the core network forwards the packet switching response message to the source BSS.

Step 208: The source BSS sends a packet switching command to the mobile terminal, and the packet switching command carries description information of the target neighboring cell;

Step 209: The mobile terminal accesses the target neighboring cell according to the description information of the target neighboring cell in the received packet handover command, and transmits uplink packet data through the TBF allocated in the target neighboring cell.

The source BSS and the target BSS may be the same BSS, in this case, it can still be processed according to the above process; or there is no need to send a packet switching request or a packet switching response message, as long as the BSS directly allocates TBF in the target neighboring cell , and then send a packet switching command to the mobile terminal. The names of the messages in the above process refer to the message names of the existing packet switching process, but the content of the messages in the above process is not necessarily consistent with the content of the message with the same name in the existing packet switching process.

In the above process, selecting a suitable target neighboring cell in step 203 is a key issue in the solution of the present invention. Two specific schemes are provided below to realize step 203.

Solution 1: The network side selects an adjacent cell according to the network configuration.

In this solution, the BSS includes a neighbor cell information configuration module, which is used to save the descriptive information list of each cell that is a neighbor cell. Like this, step 203 comprises the following steps:

Step 203a1: The source BSS selects a neighbor cell as a target neighbor cell from the locally configured neighbor cell description information list;

Step 203a2: The source BSS judges whether there are enough radio resources available for allocation to the mobile terminal in the selected target neighboring cell, if so, end step 203 and go to step 204, otherwise return to step 203a1.

The realization of this scheme mainly lies in making corresponding improvements to the existing BSS. To implement Scheme 1, BSS needs to include the following modules:

Adjacent cell information configuration module, used to save the descriptive information list of each cell that is adjacent to each other;

The resource judging module is used to judge whether there are enough wireless resources in the current cell after receiving the uplink packet resource request from the mobile terminal, and if not, notify the selection module;

A selection module, configured to select a neighboring cell as a target neighboring cell from the description information list saved by the neighboring cell information configuration module after receiving the notification from the resource judging module;

The resource allocation module is used to allocate radio resources in the target neighboring cell selected by the selection module, and assign the allocated radio resources to the mobile terminal.

Through solution one, although it is possible to allocate radio resources in the target neighboring cell, it cannot guarantee that the signal quality of the target neighboring cell is the best among all neighboring cells. If you want to select the neighbor cell with the best signal quality, you need to measure the signal quality of the neighbor cell first, and then select the neighbor cell with the best signal quality as the target neighbor cell, which is the content of the second scheme.

Solution 2: The mobile terminal measures and reports the signal quality of neighboring cells to the network side, and the network side selects neighboring cells with better signal quality according to the measurement report reported by the mobile terminal.

In this solution, the mobile terminal needs to include a measurement module and a reporting module, wherein the measurement module is used to measure the signal quality of all neighboring cells and generate measurement results; the measurement results are sent to the BSS on the network side through the reporting module. At this time, step 203 includes the following steps:

Step 203b1: The source BSS on the network side issues a measurement instruction to the mobile terminal, instructing the mobile terminal to measure the signal quality of the neighboring cell;

Step 203b2: The mobile terminal measures the signal quality of neighboring cells, and reports the measurement result to the source BSS;

Step 203b3: The source BSS selects the neighbor cell with the best signal quality as the target neighbor cell according to the received measurement results.

In order to realize the second solution, it is necessary to make corresponding improvements to both the existing mobile terminal and the BSS. Among them, the mobile terminal needs to include the following modules:

A measurement module, configured to measure the signal quality of neighboring cells and generate measurement results;

A reporting module, configured to send the measurement results obtained by the measurement module to the BSS;

The BSS includes the following modules:

The resource judging module is used to judge whether there are enough wireless resources in the current cell after receiving the uplink packet resource request from the mobile terminal, and if not, notify the selection module;

The selection module is configured to select the neighboring cell as the target neighboring cell according to the signal quality measurement result from the mobile terminal after receiving the notification from the resource judging module;

The resource allocation module is used to allocate radio resources in the target neighboring cell selected by the selection module, and assign the allocated radio resources to the mobile terminal.

The above improved mobile terminal and BSS can also be used to realize the solution of the second embodiment of the present invention. The solution of the second embodiment of the present invention is that before the mobile terminal sends an uplink packet resource request to the network side, the mobile terminal measures the signal quality of the current cell and neighboring cells, and reports the measurement results to the network side, and the network side As a result, the cell with the best signal quality is selected as the target cell, and a TBF is allocated in the target cell; the mobile terminal realizes uplink transmission of packet data based on the allocated TBF. The specific implementation process of the second embodiment is shown in Figure 3, including the following steps:

Step 301: the mobile terminal measures the signal quality of the current cell and the neighboring cells of the current cell, and obtains a signal quality measurement result.

Step 302: The mobile terminal sends an uplink packet resource request carrying the measurement result to the source BSS.

Step 303: The source BSS judges the measurement results, and if the signal quality of the current cell is the best, then allocates one or more TBFs to the mobile terminal in the current cell, and then performs packet data uplink transmission based on the allocated TBFs ; If the signal quality of one of the neighboring cells is the best, take the neighboring cell as the target neighboring cell.

This step can also be: the source BSS judges whether the current cell has enough radio resources to be allocated to the mobile terminal, and if so, allocates one or more TBFs for the mobile terminal in the current cell, and then performs packet data based on the allocated TBFs The process of uplink transmission; otherwise, the neighbor cell with the best signal quality is selected as the target neighbor cell according to the received measurement results. In this case, the mobile terminal may not measure the current cell signal in step 301 .

Step 304: The source BSS sends a packet handover request to the core network, and the request carries description information of the target neighboring cell including the identity of the target neighboring cell.

Step 305: The core network forwards the packet handover request to the BSS to which the target neighboring cell belongs. Hereinafter, the BSS to which the target neighboring cell belongs is referred to as the target BSS.

Step 306 to Step 307: The target BSS allocates one or more TBFs in the target neighboring cell, and sends a packet switching response message to the core network, and the core network forwards the packet switching response message to the source BSS.

Step 308: The source BSS sends a packet switching command to the mobile terminal, and the packet switching command carries description information of the target neighboring cell;

Step 309: The mobile terminal accesses the target neighboring cell according to the description information of the target neighboring cell in the received packet handover command, and transmits uplink packet data through the TBF allocated in the target neighboring cell.

The packet handover process of the embodiment of the present invention is different from the packet handover process of the prior art in addition to the specific steps, and also has the following difference: the packet handover command of the existing handover process uses Temporary Flow Identify (TFI) to Mobile terminal addressing, and when the handover process is initiated in the scenario of the present invention, the network has not allocated any TBF for the mobile terminal. In this case, the network cannot use TFI to address the mobile terminal when generating a packet handover command , and must be addressed using the Temporary Logical Link Identity (TLLI) of the mobile terminal.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. A method for realizing packet data retrying upstream, characterized in that the method comprises the steps: After receiving the uplink packet resource request from the mobile terminal, the network side finds that there is no wireless resource available for allocation in the current cell, and then selects a neighboring cell with sufficient wireless resources as the target neighboring cell; The network side assigns the radio resource of the target neighboring cell to the mobile terminal, and the mobile terminal performs uplink transmission of packet data based on the radio resource. 2. The method according to claim 1, wherein the network side preserves a list of descriptive information of each cell that is an adjacent cell, and the selection of an adjacent cell with sufficient wireless resources as the target adjacent cell is: the network side Select an adjacent cell of the current cell with sufficient radio resources from the cell description information list as the target adjacent cell. 3. The method according to claim 2, wherein the network side selecting a neighboring cell of the current cell with sufficient radio resources from the cell description information list as the target neighboring cell includes: The source base station subsystem BSS selects a neighbor cell as a target neighbor cell from the locally configured neighbor cell description information list; The source BSS judges whether there are enough radio resources to be allocated to the mobile terminal in the selected target neighboring cell, and if so, takes the neighboring cell as the target neighboring cell; A step of selecting an adjacent cell of the current cell with sufficient radio resources as a target adjacent cell. 4. The method according to claim 1, wherein the network side selecting an adjacent cell with sufficient wireless resources as the target adjacent cell comprises: The source BSS issues a measurement instruction to the mobile terminal, instructing the mobile terminal to measure the signal quality of neighboring cells; The mobile terminal measures the signal quality of neighboring cells, and reports the measurement result to the source BSS; The source BSS selects a neighbor cell as the target neighbor cell according to the received measurement results. 5. The method according to claim 1, wherein the uplink packet resource request from the mobile terminal carries the measurement result of the signal quality of the adjacent cell by the mobile terminal, and the network side selects one with sufficient radio resources The neighbor cell as the target neighbor cell is: The network side selects the neighbor cell with the best signal quality as the target neighbor cell according to the measurement result. 6. The method according to any one of claims 1 to 5, wherein assigning the wireless resources of the target neighboring cell to the mobile terminal by the network side comprises: The source BSS sends to the core network a packet handover request containing description information of the target neighboring cell, and the core network sends the packet handover request to the target BSS; The target BSS allocates one or more temporary block flow TBFs in the target adjacent cell, and sends a packet switching response message to the core network, and the core network forwards the packet switching response message to the source BSS; The source BSS sends a packet switching command to the mobile terminal, and the packet switching command carries description information of the target neighboring cell; the mobile terminal accesses the target neighboring cell according to the description information of the target neighboring cell in the received packet switching command. 7. The method according to claim 6, wherein the packet switching command uses a temporary logical link identity flag to address the mobile terminal. 8. A method for packet data uplink, characterized in that the method comprises the steps of: The network side receives the uplink packet resource request from the terminal and the signal quality measurement results of the current cell and neighboring cells, and selects the cell with the best signal quality as the target cell according to the measurement results; The network side assigns the radio resource of the target cell to the mobile terminal, and the mobile terminal performs uplink packet data transmission based on the radio resource. 9. A base station subsystem BSS for realizing packet data retry uplink, it is characterized in that, described BSS comprises: Adjacent cell information configuration module, used to save the descriptive information list of each cell that is adjacent to each other; The resource judging module is used to judge whether there are enough wireless resources in the current cell after receiving the uplink packet resource request from the mobile terminal, and if not, notify the selection module; A selection module, configured to select a neighboring cell as a target neighboring cell from the description information list saved by the neighboring cell information configuration module after receiving the notification from the resource judging module; The resource allocation module is used to allocate radio resources in the target neighboring cell selected by the selection module, and assign the allocated radio resources to the mobile terminal. 10. A system for realizing packet data retry uplink, comprising a mobile terminal and a BSS, wherein the mobile terminal comprises: A measurement module, configured to measure the signal quality of neighboring cells and generate measurement results; A reporting module, configured to send the measurement results obtained by the measurement module to the BSS; The BSS includes: The resource judging module is used to judge whether there are enough wireless resources in the current cell after receiving the uplink packet resource request from the mobile terminal, and if not, notify the selection module; The selection module is configured to select the neighboring cell as the target neighboring cell according to the signal quality measurement result from the mobile terminal after receiving the notification from the resource judging module; The resource allocation module is used to allocate radio resources in the target neighboring cell selected by the selection module, and assign the allocated radio resources to the mobile terminal.

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