Over-The-Air (OTA) Updates¶

Overview¶

Over-The-Air (OTA) updates enable remote management and configuration of SIM cards. This documentation covers the implementation of OTA updates in TelcoAPI.

Features¶

Remote SIM card configuration
Security key updates
Application management
File system operations
Profile updates

Implementation¶

interface OtaCommand {
  commandId: string;
  type: OtaCommandType;
  target: {
    iccid: string;
    imsi?: string;
  };
  security: {
    kic: string;  // Key for Integrity and Confidentiality
    kid: string;  // Key for ICV Derivation
    spi: number;  // Security Parameter Indicator
    tar: string;  // Toolkit Application Reference
  };
  data: {
    command: string;
    parameters?: Record<string, any>;
  };
}

enum OtaCommandType {
  PROFILE_UPDATE = 'PROFILE_UPDATE',
  KEY_UPDATE = 'KEY_UPDATE',
  APP_INSTALL = 'APP_INSTALL',
  APP_DELETE = 'APP_DELETE',
  FILE_UPDATE = 'FILE_UPDATE'
}

interface OtaResult {
  commandId: string;
  status: 'SUCCESS' | 'FAILED' | 'PENDING';
  timestamp: Date;
  response?: {
    statusCode: number;
    data?: string;
  };
  error?: {
    code: string;
    message: string;
  };
}

Security¶

Command Security¶

class OtaSecurityManager {
  async encryptCommand(command: OtaCommand): Promise<Buffer> {
    // Implementation for securing OTA commands
  }

  async verifyResponse(response: Buffer): Promise<boolean> {
    // Implementation for verifying OTA responses
  }

  async rotateKeys(iccid: string): Promise<void> {
    // Implementation for key rotation
  }
}

Transport Security¶

interface OtaTransport {
  type: 'SMS' | 'CAT_TP' | 'BIP';
  security: {
    encryption: boolean;
    signing: boolean;
    counter: boolean;
  };
  parameters: {
    timeout: number;
    retries: number;
    priority: number;
  };
}

API Operations¶

Command Management¶

class OtaCommandManager {
  async sendCommand(command: OtaCommand): Promise<string> {
    // Implementation for sending OTA commands
  }

  async checkStatus(commandId: string): Promise<OtaResult> {
    // Implementation for checking command status
  }

  async cancelCommand(commandId: string): Promise<void> {
    // Implementation for canceling commands
  }
}

Batch Operations¶

interface OtaBatchCommand {
  commands: OtaCommand[];
  options: {
    parallel: boolean;
    stopOnError: boolean;
    maxRetries: number;
  };
}

class OtaBatchManager {
  async executeBatch(batch: OtaBatchCommand): Promise<OtaResult[]> {
    // Implementation for batch command execution
  }
}

Error Handling¶

enum OtaError {
  COMMAND_FAILED = 'COMMAND_FAILED',
  SECURITY_ERROR = 'SECURITY_ERROR',
  TRANSPORT_ERROR = 'TRANSPORT_ERROR',
  TIMEOUT = 'TIMEOUT',
  INVALID_STATE = 'INVALID_STATE'
}

interface OtaErrorResponse {
  error: OtaError;
  message: string;
  commandId: string;
  timestamp: Date;
  details?: Record<string, any>;
}

Best Practices¶

Command Security
Use strong encryption
Implement counter mechanisms
Regular key rotation
Secure key storage
Transport Management
Implement retry mechanisms
Monitor delivery status
Handle partial updates
Optimize bandwidth usage
Error Handling
Implement comprehensive logging
Define fallback procedures
Monitor error patterns
Regular audits

Monitoring¶

Key Metrics¶

Command success rate
Delivery time
Error rate by type
Key rotation status
Transport performance

Performance Indicators¶

Command execution time
Network latency
Security overhead
Batch processing time

Implementation Example¶

class OtaService {
  constructor(
    private commandManager: OtaCommandManager,
    private securityManager: OtaSecurityManager,
    private logger: Logger
  ) {}

  async updateProfile(iccid: string, profile: SimProfile): Promise<OtaResult> {
    try {
      // Create OTA command
      const command: OtaCommand = {
        commandId: uuid(),
        type: OtaCommandType.PROFILE_UPDATE,
        target: { iccid },
        security: await this.securityManager.getSecurityData(iccid),
        data: {
          command: 'UPDATE_PROFILE',
          parameters: profile
        }
      };

      // Send command
      const commandId = await this.commandManager.sendCommand(command);

      // Monitor status
      return this.monitorCommandExecution(commandId);
    } catch (error) {
      this.logger.error(`OTA update failed for ICCID ${iccid}:`, error);
      throw new OtaError(error.code, error.message);
    }
  }

  private async monitorCommandExecution(commandId: string): Promise<OtaResult> {
    // Implementation for monitoring command execution
  }
}

API Endpoints¶

// Command management
POST /api/v1/ota/commands
GET /api/v1/ota/commands/{commandId}
DELETE /api/v1/ota/commands/{commandId}

// Batch operations
POST /api/v1/ota/batch
GET /api/v1/ota/batch/{batchId}

// Security management
POST /api/v1/ota/security/rotate-keys
GET /api/v1/ota/security/status

// Monitoring
GET /api/v1/ota/metrics
GET /api/v1/ota/health