WO2010105489A1 - Method, apparatus and system for allocating carrier - Google Patents

Abstract

The embodiments of the present invention disclose a method, apparatus and system for allocating carrier. The method is used in a scene that a terminal performs cell handover, and the method comprises: detecting a forward wireless environment where the terminal lies; updating the carrier allocation for the terminal when the forward wireless environment satisfies an update condition. By the embodiments of the present invention, in a handover scene, the data transmission can arrive at an optimal status when the terminal moves to the edge of a cell.

Description

 Method, device and system for allocating carrier

 The present application claims priority to the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the disclosure.

Technical field

 The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for allocating carriers. Background technique

 After the CDMA (Code Division Multiple Access) technology evolved to HRPD (High Rate Packet Data) Rev. B, a multi-carrier bundling technique was introduced. By allocating multiple carriers to the terminal, the data transmission rate can be increased so that the forward peak rate can reach 14.7 Mbps and the reverse peak rate can reach 5.4 Mbps.

 During the research, the inventor found that in the scenario of handover in the HRPD system, when the terminal moves to the cell boundary, the number of carriers configured for each cell in the activation set of the soft handover is different, and the number of carriers finally allocated to the terminal can only be The minimum number of carriers in each cell, therefore, multi-carrier binding cannot be performed when the boundary is switched, and the data transmission effect is not optimal.

 For example, when a terminal switches from a less carrier cell to a more carrier cell, if the transmission power of one frequency point in a plurality of carrier cells is too high, the frequency point interferes with the data transmission of the terminal at another frequency point, so After waiting to remove fewer carrier cells from the active set, the multi-carrier bundling technique is used for the terminal. When the terminal moves to the cell boundary, since the less carrier cell has not been deleted from the active set, the terminal cannot use the multi-carrier for data transmission, so the data transmission rate does not reach the peak value, and the transmission effect is not good.

Summary of the invention

 In view of this, the embodiments of the present invention provide a method, an apparatus, and a system for allocating carriers. In a scenario of performing handover, when the terminal moves to a cell boundary, the data transmission is optimal.

 A method for allocating a carrier, where the method is used in a scenario where a terminal performs cell handover, the method includes:

Detecting a forward wireless environment in which the terminal is located; When the forward wireless environment satisfies the update condition, the carrier allocation to the terminal is updated. A device for allocating a carrier, where the device is used in a scenario where a terminal performs cell handover, the device includes:

 a detecting unit, configured to detect a forward wireless environment in which the terminal is located;

 And an updating unit, configured to update a carrier allocation to the terminal when the detecting unit detects that the forward wireless environment meets an update condition.

 A system for allocating a carrier, where the system is used in a scenario where a terminal performs cell handover, the system includes:

 The access network AN communicates with the terminal for detecting a forward wireless environment in which the terminal is located; and when the forward wireless environment satisfies an update condition, updating a carrier allocation to the terminal.

DRAWINGS

 1 is a flow chart of a method according to an embodiment of the present invention;

 2 is a flowchart of a method according to Embodiment 2 of the present invention;

 3 is a flowchart of a method according to Embodiment 3 of the present invention;

 4 is a schematic diagram of applying the third embodiment of the present invention;

 FIG. 5 is a flowchart of a method according to Embodiment 4 of the present invention; FIG.

 6 is a block diagram showing the structure of a device according to Embodiment 5 of the present invention;

 7 is a structural block diagram of a device according to Embodiment 6 of the present invention;

 FIG. 8 is a structural block diagram of a device according to Embodiment 7 of the present invention.

detailed description

 In order to make the above features and advantages of the embodiments of the present invention more obvious, the detailed description will be described below with reference to specific embodiments.

Referring to FIG. 1 , a flowchart of a method according to an embodiment of the present invention may include the following steps: Step 101: Perform a detection on a forward wireless environment where the terminal is located; Step 102: Update the carrier allocation to the terminal when the forward wireless environment satisfies the update condition. It can be seen that the detection of the forward wireless environment can determine the number of carriers allocated for the terminal. Therefore, when the terminal moves to the cell boundary, when the current wireless environment meets the update condition, the number of carriers allocated to the terminal is updated, and data transmission can be performed. The best transmission state is achieved.

 The steps shown in Figure 1 can be applied to scenarios where switching is performed in the HRPD system. The forward wireless environment described in step 101 may include: a front pilot frequency strength or a DRC Cover (Data Rate Control). In the following, only the previous pilot frequency strength and DRF Cover are taken as an example.

 First, the case where the forward wireless environment is the front pilot frequency intensity will be described in detail.

 Referring to FIG. 2, a flowchart of a method according to Embodiment 2 of the present invention may include the following steps: Step 201: Receive a RU (Route Update Message) message reported by a terminal, where the RU message carries a first front guide. The frequency intensity and the second front pilot frequency strength; the first front pilot frequency strength is the strongest pilot frequency before the activation concentration of the terminal, and the second front pilot frequency strength is strong before the activation concentration of the terminal.

 Step 202: Determine, according to the RU message, whether an update condition is met, where the update condition includes: a difference between a front pilot frequency strength of the first pre-frequency strength cell and the second pre-frequency strength cell is greater than or The number of carriers configured by the cell with the first preamble strength is different from the number of carriers allocated by the cell with the first preamble strength reported by the previous routing update message;

 Since the terminal may move back and forth between the two cells when the terminal is located at the cell boundary, the relative comparison threshold is set to avoid the alternate switching that is more likely to occur at this time, and the number of times of carrier update is stabilized.

 Step 203: If the update condition is met, update the carrier allocation of the terminal to change the number of carriers used by the terminal.

 Steps 201 to 203 will be described in detail below.

 Referring to FIG. 3, a flowchart of a method according to Embodiment 3 of the present invention may include the following steps: Step 301: A terminal and an AN (access network) negotiate attributes in a session configuration negotiation phase.

ServingSectorLockAcrossSubActiveSets negotiates to 4 unlocked mode; Step 302: After the terminal establishes a connection with the AN, the AN sends a TCA (Traffic Channel Assignment message) message to the terminal.

 At this time, the TCA message is used to guide the terminal to perform cell handover;

 In step 302, the TCA message includes the ΡΝ offset of each cell of the established connection, the number of carrier allocations, and the like.

 Step 303: The AN determines whether the number of carriers configured by each cell in the active set of the terminal is the same. If not, the AN starts a timer.

 The configuration refers to a static data configuration of a cell. For example, one cell is configured with 2 carriers.

 Step 304: When the accumulated time of the timer is greater than the preset threshold, the AN sends a RUR (Routing Update Request Message) message to the terminal, requesting the terminal to lick the RU message;

 Step 305: After receiving the RUR message from the AN, the terminal returns a RU message to the AN. The RU message returned by the terminal carries the first pre-frequency and the second pre-frequency. Step 306: After receiving the RU message, the AN determines whether the update condition is met, if yes, proceeds to step 307, otherwise, proceeds to step 304;

 The update condition includes: a difference between a first pilot frequency strength cell and a second preamble strength cell front pilot frequency strength is greater than or equal to a relative comparison threshold, and the number of carriers configured by the cell of the first preamble frequency strength is The number of carriers allocated by the cell of the first pre-frequency strength reported by the last routing update message is different.

 For the update condition, refer to the following example: If the front pilot frequency of the cell with the first preamble strength is -3dB, the preamble strength of the cell with the second preamble strength is -7dB, and the relative comparison threshold is 2dB. The difference between the first pilot frequency strength of the cell of the first preamble strength and the cell of the second preamble strength is greater than the relative comparison threshold, and the number of carriers configured by the cell of the first preamble strength and the last route update message If the number of carriers allocated by the cell of the first pre-frequency of the reported frequency is different, the update condition is satisfied.

Step 307: The AN sends a TCA message to the terminal, and updates the carrier allocation of the terminal to change the location. The number of carriers used by the terminal is described, and the process returns to step 303.

 The allocation refers to the number of carriers dynamically allocated for the terminal. For example, if the number of carriers of a cell delivered by the TCA message is 1, the number of allocated carriers must be less than or equal to the number of carriers configured in the cell. In step 307, the TCA message includes a PN offset of the cell of the first preamble strength, a PN offset of the cell of the second preamble strength, and a carrier configuration corresponding to each cell.

 It should be noted that updating the carrier allocation of the terminal is one of the cases included in the activation set of the update terminal. Another case of updating the active set of terminals is to update the cell in which the terminal is located. The method provided in Embodiment 3 of the present invention can also update the carrier allocation of the terminal while updating the cell in which the terminal is located.

 The method provided in the foregoing Embodiment 3 of the present invention can be applied to a terminal switching from a less carrier cell to a more carrier cell, and can also be applied to a terminal switching from a more carrier cell to a less carrier cell. The third embodiment of the present invention is also applicable to the case where the TCA message instructs the terminal to include at least two cells when performing handover.

 Please refer to FIG. 4, which is a schematic diagram of a third embodiment of the present invention. In Figure 4, the current active set of the terminal includes a cell with a PN bias of a and a cell with a PN bias of b. The carrier configured for the cell with PN offset a is fl, and the carrier for cell configuration with PN offset b is fl and £2. The active set delivered by the TCA message is initially assigned to the carrier fl, both PNa and PNb. When the terminal moves from the position shown in (a) to the position shown in (b), the AN detects that the forward wireless environment satisfies the update condition of the embodiment of the present invention, and updates the carrier allocation of the terminal, and the terminal can utilize fl and £. 2 Data transmission.

 The above is a detailed description of the case where the forward wireless environment is the front pilot frequency. The following describes the case where the forward wireless environment is the DRC Cover.

 Referring to FIG. 5, it is a flowchart of a method according to Embodiment 4 of the present invention, which may include the following steps: Step 501: The terminal and the AN negotiate a non-locked (unlocked) mode on the attribute ServingSectorLockAcrossSubActiveSets in the session configuration negotiation phase;

Step 502: After the terminal establishes a connection with the AN, the AN sends a TCA message to the terminal, where the TCA message is used to guide the terminal to perform cell handover. Step 503: The AN detects the DRC Cover, determines whether the cell pointed to by the DRC Cover has changed, and if the change occurs, the update condition of the embodiment of the present invention is satisfied, and proceeds to step 504, otherwise, step 503 is continued;

 Step 504: The AN sends a TCA message to the terminal according to the number of carriers configured by the cell to which the DRC Cover is currently located, to update the carrier allocation of the terminal, and returns to step 503.

Update the carrier configuration of the terminal.

 It can be seen that the detection of the forward wireless environment can determine the number of carriers allocated for the terminal. Therefore, when the terminal moves to the cell boundary, when the current wireless environment meets the update condition, the number of carriers allocated to the terminal is updated, and data transmission can be performed. The best transmission state is achieved. Please refer to FIG. 6, which is a structural block diagram of a device according to Embodiment 5 of the present invention, which may include:

 The detecting unit 601 is configured to detect a forward wireless environment where the terminal is located, and the updating unit 602 is configured to: when the detecting unit 601 detects that the forward wireless environment meets an update condition, update the terminal Carrier allocation.

 Please refer to FIG. 7, which is a structural block diagram of a device according to Embodiment 6 of the present invention.

 The detecting unit 701 is configured to detect a forward wireless environment where the terminal is located, and the updating unit 702 is configured to: when the detecting unit 701 detects that the forward wireless environment meets an update condition, update the terminal Carrier allocation.

The detecting unit 701 may include: a receiving unit 703, configured to receive a routing update message reported by the terminal, where the routing update message carries a first pre-frequency and a second pre-frequency strength; 704. The method is used to determine, according to the routing update message that is received by the receiving unit 703, whether the update condition is met, where the update condition includes: the first pre-frequency strength cell and the second front pilot frequency The difference between the front pilot frequency strengths of the intensities of the cells is greater than or equal to the preset relative comparison threshold, and the number of carriers configured by the cell of the first preamble frequency strength and the cell of the first preamble frequency reported by the previous routing update message The number of assigned carriers is different. The device can also include:

 The initiating unit 705 is configured to start a timer if the number of carriers configured by each cell in the active set of the terminal is different;

 The sending unit 706 is configured to send a route update request message to the terminal when the accumulated time of the timer is greater than a preset threshold.

 Please refer to FIG. 8, which is a structural block diagram of a device according to Embodiment 7 of the present invention. The detecting unit 801 is configured to detect a forward wireless environment where the terminal is located, and the updating unit 802 is configured to: when the detecting unit 801 detects that the forward wireless environment meets an update condition, update the terminal Carrier allocation to change the number of carriers used by the terminal.

 The detecting unit 801 may include: a detecting subunit 803, configured to detect a direction of the DRC Cover; a second determining unit 804, configured to determine whether a cell pointed by the DRC Cover has changed, if the DRC Cover If the cell pointed to has changed, the update condition is satisfied.

 Embodiment 8 of the present invention further provides a system for allocating carriers in an HRPD system, where the system is used in a scenario where a terminal performs cell handover, and includes:

 The AN is in communication with the terminal for detecting a forward wireless environment in which the terminal is located; and updating a carrier allocation to the terminal when the forward wireless environment satisfies an update condition.

 For the specific operations performed by the AN and the terminal, refer to the description of the method part of the embodiment of the present invention, and details are not described herein.

Finally, it should also be noted that in this context, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities. There is any such actual relationship or order between operations. Furthermore, the terms "comprising,""comprising," or "include" or "the" or "the" Other elements, or elements that are inherent to such a process, method, item, or device. In the absence of more restrictions, by the statement "includes one The term "limited elements" does not exclude the presence of additional identical elements in a process, method, article, or device that includes the elements.

 Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary hardware platform, and of course, all can be implemented by hardware, but in many cases, the former is better. Implementation. Based on such understanding, all or part of the technical solution of the present invention contributing to the background art may be embodied in the form of a software product, which may be stored in a storage medium such as a ROM/RAM, a magnetic disk, an optical disk, or the like. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

 The present invention has been described in detail above, and the principles and embodiments of the present invention have been described with reference to specific examples. The description of the above embodiments is only for helping to understand the method of the present invention and its core ideas; The present invention is not limited by the scope of the present invention, and the details of the present invention are not limited by the scope of the present invention.

Claims

Claim A method for allocating a carrier, where the method is used in a scenario where a terminal performs cell handover, and the method includes:  Detecting a forward wireless environment in which the terminal is located;  When the forward wireless environment satisfies the update condition, the carrier allocation to the terminal is updated. 2. The method according to claim 1, wherein the forward wireless environment comprises: a front pilot frequency strength or a cell DRC Cover to which the data rate control is directed.  The method according to claim 2, wherein when the forward wireless environment is a forward pilot strength, the detecting the forward wireless environment in which the terminal is located includes:  And receiving, by the terminal, a route update message, where the route update message carries a first pre-frequency and a second pre-frequency;  Determining, according to the route update message, whether the update condition is met, where the update condition includes: a difference between a front pilot frequency strength of the cell of the first preamble strength and a cell of the second preamble strength is greater than or It is equal to the preset relative comparison threshold, and the number of carriers configured by the cell of the first preamble strength is different from the number of carriers allocated by the cell of the first preamble strength reported by the previous routing update message.  The method according to claim 3, wherein before the receiving the routing update message reported by the terminal, the method further includes:  If the number of carriers configured in each cell in the active set of the terminal is different, a timer is started; when the accumulated time of the timer is greater than a preset threshold, a route update request message is sent to the terminal. The method according to claim 2, wherein when the forward wireless environment is a DRC Cover, the detecting the forward wireless environment in which the terminal is located includes:  Detecting the direction of the DRC Cover; Determining whether a cell pointed to by the DRC Cover has changed, if the DRC Cover If the cell pointed to has changed, the update condition is satisfied.  The method according to claim 5, wherein the updating the carrier allocation to the terminal comprises:  Updating the carrier allocation of the terminal according to the number of frequency points included in the cell pointed by the DRC Cover.  The method according to claim 1, wherein the method further comprises: negotiating a mode with the attribute ServingSectorLockAcrossSubActiveSets in the session configuration negotiation phase with the terminal.  A device for allocating a carrier, wherein the device is used in a scenario where a terminal performs cell handover, and the device includes:  a detecting unit, configured to detect a forward wireless environment where the terminal is located, and an updating unit, configured to: when the detecting unit detects that the forward wireless environment meets an update condition, update a carrier allocation to the terminal .  The device according to claim 8, wherein the detecting unit comprises: a receiving unit, configured to receive a routing update message reported by the terminal, where the routing update message carries a first pre-frequency strength And the second pre-frequency strength; the first determining unit is configured to determine, according to the routing update message received by the receiving unit, whether the update condition is met, where the update condition includes: the first pre-frequency strength The difference between the previous pilot frequency of the cell of the second preamble strength is greater than or equal to the preset relative comparison threshold, and the number of carriers configured by the cell of the first preamble strength and the last routing update message The number of carriers allocated by the cell of the first pre-frequency of the reported frequency is different.  The device according to claim 9, wherein the device further includes: a starting unit, configured to start a timer if the number of carriers configured by each cell in the active set of the terminal is different; a sending unit, configured to: when the accumulated time of the timer is greater than a preset threshold, The terminal sends a route update request message.  The device according to claim 8, wherein the detecting unit comprises: a detecting subunit, configured to detect a pointing of the DRC Cover;  The second determining unit is configured to determine whether the cell pointed to by the DRC Cover has changed, and if the cell pointed to by the DRC Cover changes, the update condition is met.  A system for allocating a carrier, where the system is used in a scenario in which a terminal performs cell switching, the system includes:  The access network AN communicates with the terminal for detecting a forward wireless environment in which the terminal is located; and when the forward wireless environment satisfies an update condition, updating a carrier allocation to the terminal.